src/SDL12_compat.c
author Ryan C. Gordon <icculus@icculus.org>
Fri, 08 Mar 2019 21:27:57 -0500
changeset 107 675826327470
parent 106 8948c4b1ef8d
child 108 d3b0971aa72c
permissions -rw-r--r--
Load/unload SDL2 at DLL init time.

This catches all the corner cases, but I'm not sure of the ramifications of
this yet. Might dump this change later.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 /* This file contains functions for backwards compatibility with SDL 1.2 */
    23 
    24 // !!! FIXME: clean up code conventions
    25 // !!! FIXME: grep for VideoWindow20 places that might care if it's NULL
    26 
    27 #include "SDL20_include_wrapper.h"
    28 
    29 #if !SDL_VERSION_ATLEAST(2,0,0)
    30 #error You need to compile against SDL 2.0 headers.
    31 #endif
    32 
    33 /*
    34  * We report the library version as 1.2.$(SDL12_COMPAT_VERSION). This number
    35  *  should be way ahead of what SDL-1.2 Classic would report, so apps can
    36  *  decide if they're running under the compat layer, if they really care.
    37  */
    38 #define SDL12_COMPAT_VERSION 50
    39 
    40 #include <stdarg.h>
    41 
    42 // !!! IMPLEMENT_ME SDL_CDClose
    43 // !!! IMPLEMENT_ME SDL_CDEject
    44 // !!! IMPLEMENT_ME SDL_CDName
    45 // !!! IMPLEMENT_ME SDL_CDNumDrives
    46 // !!! IMPLEMENT_ME SDL_CDOpen
    47 // !!! IMPLEMENT_ME SDL_CDPause
    48 // !!! IMPLEMENT_ME SDL_CDPlay
    49 // !!! IMPLEMENT_ME SDL_CDPlayTracks
    50 // !!! IMPLEMENT_ME SDL_CDResume
    51 // !!! IMPLEMENT_ME SDL_CDStatus
    52 // !!! IMPLEMENT_ME SDL_CDStop
    53 // !!! IMPLEMENT_ME SDL_CreateYUVOverlay
    54 
    55 // !!! IMPLEMENT_ME SDL_DisplayFormatAlpha
    56 // !!! IMPLEMENT_ME SDL_DisplayYUVOverlay
    57 // !!! IMPLEMENT_ME SDL_EnableKeyRepeat
    58 // !!! IMPLEMENT_ME SDL_EnableUNICODE
    59 // !!! IMPLEMENT_ME SDL_FreeYUVOverlay
    60 
    61 // !!! IMPLEMENT_ME SDL_GL_Lock
    62 // !!! IMPLEMENT_ME SDL_GL_Unlock
    63 // !!! IMPLEMENT_ME SDL_GL_UpdateRects
    64 
    65 // !!! IMPLEMENT_ME SDL_GetKeyName
    66 // !!! IMPLEMENT_ME SDL_GetKeyState
    67 // !!! IMPLEMENT_ME SDL_GetModState
    68 // !!! IMPLEMENT_ME SDL_GetRelativeMouseState
    69 
    70 // !!! IMPLEMENT_ME SDL_GetVideoSurface
    71 // !!! IMPLEMENT_ME SDL_GetWMInfo
    72 
    73 // !!! IMPLEMENT_ME SDL_LockSurface
    74 // !!! IMPLEMENT_ME SDL_LockYUVOverlay
    75 // !!! IMPLEMENT_ME SDL_LowerBlit
    76 
    77 // !!! IMPLEMENT_ME SDL_SetAlpha
    78 // !!! IMPLEMENT_ME SDL_SetColorKey
    79 // !!! IMPLEMENT_ME SDL_SetColors
    80 
    81 // !!! IMPLEMENT_ME SDL_SetModState
    82 // !!! IMPLEMENT_ME SDL_SetPalette
    83 // !!! IMPLEMENT_ME SDL_SetVideoMode
    84 // !!! IMPLEMENT_ME SDL_SoftStretch
    85 // !!! IMPLEMENT_ME SDL_UnlockSurface
    86 // !!! IMPLEMENT_ME SDL_UnlockYUVOverlay
    87 // !!! IMPLEMENT_ME SDL_UpdateRects
    88 // !!! IMPLEMENT_ME SDL_UpperBlit
    89 
    90 // !!! FIXME: should SDL_VideoInit really be a passthrough?
    91 // !!! FIXME: should SDL_VideoQuit really be a passthrough?
    92 
    93 // !!! IMPLEMENT_ME SDL_WM_SetIcon
    94 // !!! IMPLEMENT_ME SDL_WM_ToggleFullScreen
    95 
    96 // !!! IMPLEMENT_ME X11_KeyToUnicode
    97 
    98 #define SDL_BlitSurface SDL_UpperBlit
    99 
   100 #if 0
   101 #define FIXME(x) do {} while (0)
   102 #else
   103 #define FIXME(x) \
   104     do { \
   105         static SDL_bool seen = SDL_FALSE; \
   106         if (!seen) { \
   107             fprintf(stderr, "FIXME: %s (%s, %s:%d)\n", x, __FUNCTION__, __FILE__, __LINE__); \
   108             seen = SDL_TRUE; \
   109         } \
   110     } while (0)
   111 #endif
   112 
   113 #define SDL20_SYM(rc,fn,params,args,ret) \
   114     typedef rc (SDLCALL *SDL20_##fn##_t) params; \
   115     static SDL20_##fn##_t SDL20_##fn = NULL;
   116 #include "SDL20_syms.h"
   117 
   118 /* Things that _should_ be binary compatible pass right through... */
   119 #define SDL20_SYM_PASSTHROUGH(rc,fn,params,args,ret) \
   120     DECLSPEC rc SDLCALL SDL_##fn params { ret SDL20_##fn args; }
   121 #include "SDL20_syms.h"
   122 
   123 
   124 /* these are macros (etc) in the SDL headers, so make our own. */
   125 #define SDL20_OutOfMemory() SDL20_Error(SDL_ENOMEM)
   126 #define SDL20_Unsupported() SDL20_Error(SDL_UNSUPPORTED)
   127 #define SDL20_InvalidParamError(param) SDL20_SetError("Parameter '%s' is invalid", (param))
   128 #define SDL20_zero(x) SDL20_memset(&(x), 0, sizeof((x)))
   129 #define SDL20_zerop(x) SDL20_memset((x), 0, sizeof(*(x)))
   130 #define SDL_ReportAssertion SDL20_ReportAssertion
   131 
   132 #define SDL12_DEFAULT_REPEAT_DELAY 500
   133 #define SDL12_DEFAULT_REPEAT_INTERVAL 30
   134 
   135 #define SDL12_INIT_TIMER       0x00000001
   136 #define SDL12_INIT_AUDIO       0x00000010
   137 #define SDL12_INIT_VIDEO       0x00000020
   138 #define SDL12_INIT_CDROM       0x00000100
   139 #define SDL12_INIT_JOYSTICK    0x00000200
   140 #define SDL12_INIT_NOPARACHUTE 0x00100000
   141 #define SDL12_INIT_EVENTTHREAD 0x01000000
   142 #define SDL12_INIT_EVERYTHING  0x0000FFFF
   143 
   144 #define SDL12_LOGPAL 1
   145 #define SDL12_PHYSPAL 2
   146 
   147 // this will be in SDL 2.0.10, but here it is in case your headers are missing it.
   148 #ifndef SDL_SIMD_ALIGNED
   149 #define SDL_SIMD_ALIGNED    0x00000008
   150 #endif
   151 
   152 typedef struct SDL12_Rect
   153 {
   154     Sint16 x;
   155     Sint16 y;
   156     Uint16 w;
   157     Uint16 h;
   158 } SDL12_Rect;
   159 
   160 typedef struct SDL12_Palette
   161 {
   162     int       ncolors;
   163     SDL_Color *colors;
   164 } SDL12_Palette;
   165 
   166 typedef struct SDL12_PixelFormat
   167 {
   168     SDL12_Palette *palette;
   169     Uint8 BitsPerPixel;
   170     Uint8 BytesPerPixel;
   171     Uint8 Rloss;
   172     Uint8 Gloss;
   173     Uint8 Bloss;
   174     Uint8 Aloss;
   175     Uint8 Rshift;
   176     Uint8 Gshift;
   177     Uint8 Bshift;
   178     Uint8 Ashift;
   179     Uint32 Rmask;
   180     Uint32 Gmask;
   181     Uint32 Bmask;
   182     Uint32 Amask;
   183     Uint32 colorkey;
   184     Uint8 alpha;
   185 } SDL12_PixelFormat;
   186 
   187 typedef struct SDL12_Surface
   188 {
   189     Uint32 flags;
   190     SDL12_PixelFormat *format;
   191     int w;
   192     int h;
   193     Uint16 pitch;
   194     void *pixels;
   195     int offset;
   196     SDL_Surface *surface20; /* the real SDL 1.2 has an opaque pointer to a platform-specific thing here named "hwdata". */
   197     SDL12_Rect clip_rect;
   198     Uint32 unused1;
   199     Uint32 locked;
   200     void *blitmap;
   201     unsigned int format_version;
   202     int refcount;
   203 } SDL12_Surface;
   204 
   205 typedef struct SDL12_Overlay
   206 {
   207     Uint32 format;
   208     int w;
   209     int h;
   210     int planes;
   211     Uint16 *pitches;
   212     Uint8 **pixels;
   213     void *hwfuncs;
   214     void *hwdata;
   215     Uint32 hw_overlay :1;
   216     Uint32 UnusedBits :31;
   217 } SDL12_Overlay;
   218 
   219 typedef struct
   220 {
   221     Uint32 hw_available :1;
   222     Uint32 wm_available :1;
   223     Uint32 UnusedBits1  :6;
   224     Uint32 UnusedBits2  :1;
   225     Uint32 blit_hw      :1;
   226     Uint32 blit_hw_CC   :1;
   227     Uint32 blit_hw_A    :1;
   228     Uint32 blit_sw      :1;
   229     Uint32 blit_sw_CC   :1;
   230     Uint32 blit_sw_A    :1;
   231     Uint32 blit_fill    :1;
   232     Uint32 UnusedBits3  :16;
   233     Uint32 video_mem;
   234     SDL_PixelFormat *vfmt;
   235     int current_w;
   236     int current_h;
   237 } SDL12_VideoInfo;
   238 
   239 
   240 #define SDL12_HWSURFACE 0x00000001
   241 #define SDL12_ASYNCBLIT 0x00000004
   242 #define SDL12_ANYFORMAT 0x10000000
   243 #define SDL12_HWPALETTE 0x20000000
   244 #define SDL12_DOUBLEBUF 0x40000000
   245 #define SDL12_FULLSCREEN 0x80000000
   246 #define SDL12_OPENGL 0x00000002
   247 #define SDL12_OPENGLBLIT 0x0000000A
   248 #define SDL12_RESIZABLE 0x00000010
   249 #define SDL12_NOFRAME 0x00000020
   250 #define SDL12_HWACCEL 0x00000100
   251 #define SDL12_SRCCOLORKEY 0x00001000
   252 #define SDL12_RLEACCELOK 0x00002000
   253 #define SDL12_RLEACCEL 0x00004000
   254 #define SDL12_SRCALPHA 0x00010000
   255 #define SDL12_PREALLOC 0x01000000
   256 
   257 typedef enum
   258 {
   259     SDLK12_UNKNOWN = 0,
   260     SDLK12_FIRST = 0,
   261     SDLK12_BACKSPACE = 8,
   262     SDLK12_TAB = 9,
   263     SDLK12_CLEAR = 12,
   264     SDLK12_RETURN = 13,
   265     SDLK12_PAUSE = 19,
   266     SDLK12_ESCAPE = 27,
   267     SDLK12_SPACE = 32,
   268     SDLK12_EXCLAIM = 33,
   269     SDLK12_QUOTEDBL = 34,
   270     SDLK12_HASH = 35,
   271     SDLK12_DOLLAR = 36,
   272     SDLK12_AMPERSAND = 38,
   273     SDLK12_QUOTE = 39,
   274     SDLK12_LEFTPAREN = 40,
   275     SDLK12_RIGHTPAREN = 41,
   276     SDLK12_ASTERISK = 42,
   277     SDLK12_PLUS = 43,
   278     SDLK12_COMMA = 44,
   279     SDLK12_MINUS = 45,
   280     SDLK12_PERIOD = 46,
   281     SDLK12_SLASH = 47,
   282     SDLK12_0 = 48,
   283     SDLK12_1 = 49,
   284     SDLK12_2 = 50,
   285     SDLK12_3 = 51,
   286     SDLK12_4 = 52,
   287     SDLK12_5 = 53,
   288     SDLK12_6 = 54,
   289     SDLK12_7 = 55,
   290     SDLK12_8 = 56,
   291     SDLK12_9 = 57,
   292     SDLK12_COLON = 58,
   293     SDLK12_SEMICOLON = 59,
   294     SDLK12_LESS = 60,
   295     SDLK12_EQUALS = 61,
   296     SDLK12_GREATER = 62,
   297     SDLK12_QUESTION = 63,
   298     SDLK12_AT = 64,
   299     SDLK12_LEFTBRACKET = 91,
   300     SDLK12_BACKSLASH = 92,
   301     SDLK12_RIGHTBRACKET = 93,
   302     SDLK12_CARET = 94,
   303     SDLK12_UNDERSCORE = 95,
   304     SDLK12_BACKQUOTE = 96,
   305     SDLK12_a = 97,
   306     SDLK12_b = 98,
   307     SDLK12_c = 99,
   308     SDLK12_d = 100,
   309     SDLK12_e = 101,
   310     SDLK12_f = 102,
   311     SDLK12_g = 103,
   312     SDLK12_h = 104,
   313     SDLK12_i = 105,
   314     SDLK12_j = 106,
   315     SDLK12_k = 107,
   316     SDLK12_l = 108,
   317     SDLK12_m = 109,
   318     SDLK12_n = 110,
   319     SDLK12_o = 111,
   320     SDLK12_p = 112,
   321     SDLK12_q = 113,
   322     SDLK12_r = 114,
   323     SDLK12_s = 115,
   324     SDLK12_t = 116,
   325     SDLK12_u = 117,
   326     SDLK12_v = 118,
   327     SDLK12_w = 119,
   328     SDLK12_x = 120,
   329     SDLK12_y = 121,
   330     SDLK12_z = 122,
   331     SDLK12_DELETE = 127,
   332     SDLK12_WORLD_0 = 160,
   333     SDLK12_WORLD_1 = 161,
   334     SDLK12_WORLD_2 = 162,
   335     SDLK12_WORLD_3 = 163,
   336     SDLK12_WORLD_4 = 164,
   337     SDLK12_WORLD_5 = 165,
   338     SDLK12_WORLD_6 = 166,
   339     SDLK12_WORLD_7 = 167,
   340     SDLK12_WORLD_8 = 168,
   341     SDLK12_WORLD_9 = 169,
   342     SDLK12_WORLD_10 = 170,
   343     SDLK12_WORLD_11 = 171,
   344     SDLK12_WORLD_12 = 172,
   345     SDLK12_WORLD_13 = 173,
   346     SDLK12_WORLD_14 = 174,
   347     SDLK12_WORLD_15 = 175,
   348     SDLK12_WORLD_16 = 176,
   349     SDLK12_WORLD_17 = 177,
   350     SDLK12_WORLD_18 = 178,
   351     SDLK12_WORLD_19 = 179,
   352     SDLK12_WORLD_20 = 180,
   353     SDLK12_WORLD_21 = 181,
   354     SDLK12_WORLD_22 = 182,
   355     SDLK12_WORLD_23 = 183,
   356     SDLK12_WORLD_24 = 184,
   357     SDLK12_WORLD_25 = 185,
   358     SDLK12_WORLD_26 = 186,
   359     SDLK12_WORLD_27 = 187,
   360     SDLK12_WORLD_28 = 188,
   361     SDLK12_WORLD_29 = 189,
   362     SDLK12_WORLD_30 = 190,
   363     SDLK12_WORLD_31 = 191,
   364     SDLK12_WORLD_32 = 192,
   365     SDLK12_WORLD_33 = 193,
   366     SDLK12_WORLD_34 = 194,
   367     SDLK12_WORLD_35 = 195,
   368     SDLK12_WORLD_36 = 196,
   369     SDLK12_WORLD_37 = 197,
   370     SDLK12_WORLD_38 = 198,
   371     SDLK12_WORLD_39 = 199,
   372     SDLK12_WORLD_40 = 200,
   373     SDLK12_WORLD_41 = 201,
   374     SDLK12_WORLD_42 = 202,
   375     SDLK12_WORLD_43 = 203,
   376     SDLK12_WORLD_44 = 204,
   377     SDLK12_WORLD_45 = 205,
   378     SDLK12_WORLD_46 = 206,
   379     SDLK12_WORLD_47 = 207,
   380     SDLK12_WORLD_48 = 208,
   381     SDLK12_WORLD_49 = 209,
   382     SDLK12_WORLD_50 = 210,
   383     SDLK12_WORLD_51 = 211,
   384     SDLK12_WORLD_52 = 212,
   385     SDLK12_WORLD_53 = 213,
   386     SDLK12_WORLD_54 = 214,
   387     SDLK12_WORLD_55 = 215,
   388     SDLK12_WORLD_56 = 216,
   389     SDLK12_WORLD_57 = 217,
   390     SDLK12_WORLD_58 = 218,
   391     SDLK12_WORLD_59 = 219,
   392     SDLK12_WORLD_60 = 220,
   393     SDLK12_WORLD_61 = 221,
   394     SDLK12_WORLD_62 = 222,
   395     SDLK12_WORLD_63 = 223,
   396     SDLK12_WORLD_64 = 224,
   397     SDLK12_WORLD_65 = 225,
   398     SDLK12_WORLD_66 = 226,
   399     SDLK12_WORLD_67 = 227,
   400     SDLK12_WORLD_68 = 228,
   401     SDLK12_WORLD_69 = 229,
   402     SDLK12_WORLD_70 = 230,
   403     SDLK12_WORLD_71 = 231,
   404     SDLK12_WORLD_72 = 232,
   405     SDLK12_WORLD_73 = 233,
   406     SDLK12_WORLD_74 = 234,
   407     SDLK12_WORLD_75 = 235,
   408     SDLK12_WORLD_76 = 236,
   409     SDLK12_WORLD_77 = 237,
   410     SDLK12_WORLD_78 = 238,
   411     SDLK12_WORLD_79 = 239,
   412     SDLK12_WORLD_80 = 240,
   413     SDLK12_WORLD_81 = 241,
   414     SDLK12_WORLD_82 = 242,
   415     SDLK12_WORLD_83 = 243,
   416     SDLK12_WORLD_84 = 244,
   417     SDLK12_WORLD_85 = 245,
   418     SDLK12_WORLD_86 = 246,
   419     SDLK12_WORLD_87 = 247,
   420     SDLK12_WORLD_88 = 248,
   421     SDLK12_WORLD_89 = 249,
   422     SDLK12_WORLD_90 = 250,
   423     SDLK12_WORLD_91 = 251,
   424     SDLK12_WORLD_92 = 252,
   425     SDLK12_WORLD_93 = 253,
   426     SDLK12_WORLD_94 = 254,
   427     SDLK12_WORLD_95 = 255,
   428     SDLK12_KP0 = 256,
   429     SDLK12_KP1 = 257,
   430     SDLK12_KP2 = 258,
   431     SDLK12_KP3 = 259,
   432     SDLK12_KP4 = 260,
   433     SDLK12_KP5 = 261,
   434     SDLK12_KP6 = 262,
   435     SDLK12_KP7 = 263,
   436     SDLK12_KP8 = 264,
   437     SDLK12_KP9 = 265,
   438     SDLK12_KP_PERIOD = 266,
   439     SDLK12_KP_DIVIDE = 267,
   440     SDLK12_KP_MULTIPLY = 268,
   441     SDLK12_KP_MINUS = 269,
   442     SDLK12_KP_PLUS = 270,
   443     SDLK12_KP_ENTER = 271,
   444     SDLK12_KP_EQUALS = 272,
   445     SDLK12_UP = 273,
   446     SDLK12_DOWN = 274,
   447     SDLK12_RIGHT = 275,
   448     SDLK12_LEFT = 276,
   449     SDLK12_INSERT = 277,
   450     SDLK12_HOME = 278,
   451     SDLK12_END = 279,
   452     SDLK12_PAGEUP = 280,
   453     SDLK12_PAGEDOWN = 281,
   454     SDLK12_F1 = 282,
   455     SDLK12_F2 = 283,
   456     SDLK12_F3 = 284,
   457     SDLK12_F4 = 285,
   458     SDLK12_F5 = 286,
   459     SDLK12_F6 = 287,
   460     SDLK12_F7 = 288,
   461     SDLK12_F8 = 289,
   462     SDLK12_F9 = 290,
   463     SDLK12_F10 = 291,
   464     SDLK12_F11 = 292,
   465     SDLK12_F12 = 293,
   466     SDLK12_F13 = 294,
   467     SDLK12_F14 = 295,
   468     SDLK12_F15 = 296,
   469     SDLK12_NUMLOCK = 300,
   470     SDLK12_CAPSLOCK = 301,
   471     SDLK12_SCROLLOCK = 302,
   472     SDLK12_RSHIFT = 303,
   473     SDLK12_LSHIFT = 304,
   474     SDLK12_RCTRL = 305,
   475     SDLK12_LCTRL = 306,
   476     SDLK12_RALT = 307,
   477     SDLK12_LALT = 308,
   478     SDLK12_RMETA = 309,
   479     SDLK12_LMETA = 310,
   480     SDLK12_LSUPER = 311,
   481     SDLK12_RSUPER = 312,
   482     SDLK12_MODE = 313,
   483     SDLK12_COMPOSE = 314,
   484     SDLK12_HELP = 315,
   485     SDLK12_PRINT = 316,
   486     SDLK12_SYSREQ = 317,
   487     SDLK12_BREAK = 318,
   488     SDLK12_MENU = 319,
   489     SDLK12_POWER = 320,
   490     SDLK12_EURO = 321,
   491     SDLK12_UNDO = 322,
   492     SDLK12_LAST
   493 } SDL12Key;
   494 
   495 typedef enum
   496 {
   497     KMOD12_NONE  = 0x0000,
   498     KMOD12_LSHIFT = 0x0001,
   499     KMOD12_RSHIFT = 0x0002,
   500     KMOD12_LCTRL = 0x0040,
   501     KMOD12_RCTRL = 0x0080,
   502     KMOD12_LALT = 0x0100,
   503     KMOD12_RALT = 0x0200,
   504     KMOD12_LMETA = 0x0400,
   505     KMOD12_RMETA = 0x0800,
   506     KMOD12_NUM = 0x1000,
   507     KMOD12_CAPS = 0x2000,
   508     KMOD12_MODE = 0x4000,
   509     KMOD12_RESERVED = 0x8000
   510 } SDL12Mod;
   511 
   512 typedef struct SDL12_keysym
   513 {
   514     Uint8 scancode;
   515     SDL12Key sym;
   516     SDL12Mod mod;
   517     Uint16 unicode;
   518 } SDL12_keysym;
   519 
   520 typedef enum
   521 {
   522     SDL12_NOEVENT = 0,
   523     SDL12_ACTIVEEVENT,
   524     SDL12_KEYDOWN,
   525     SDL12_KEYUP,
   526     SDL12_MOUSEMOTION,
   527     SDL12_MOUSEBUTTONDOWN,
   528     SDL12_MOUSEBUTTONUP,
   529     SDL12_JOYAXISMOTION,
   530     SDL12_JOYBALLMOTION,
   531     SDL12_JOYHATMOTION,
   532     SDL12_JOYBUTTONDOWN,
   533     SDL12_JOYBUTTONUP,
   534     SDL12_QUIT,
   535     SDL12_SYSWMEVENT,
   536     SDL12_EVENT_RESERVEDA,
   537     SDL12_EVENT_RESERVEDB,
   538     SDL12_VIDEORESIZE,
   539     SDL12_VIDEOEXPOSE,
   540     SDL12_USEREVENT = 24,
   541     SDL12_NUMEVENTS = 32
   542 } SDL12_EventType;
   543 
   544 
   545 #define SDL12_APPMOUSEFOCUS (1<<0)
   546 #define SDL12_APPINPUTFOCUS (1<<1)
   547 #define SDL12_APPACTIVE     (1<<2)
   548 
   549 typedef struct
   550 {
   551     Uint8 type;
   552     Uint8 gain;
   553     Uint8 state;
   554 } SDL12_ActiveEvent;
   555 
   556 typedef struct
   557 {
   558     Uint8 type;
   559     Uint8 which;
   560     Uint8 state;
   561     SDL12_keysym keysym;
   562 } SDL12_KeyboardEvent;
   563 
   564 typedef struct
   565 {
   566     Uint8 type;
   567     Uint8 which;
   568     Uint8 state;
   569     Uint16 x, y;
   570     Sint16 xrel;
   571     Sint16 yrel;
   572 } SDL12_MouseMotionEvent;
   573 
   574 typedef struct
   575 {
   576     Uint8 type;
   577     Uint8 which;
   578     Uint8 button;
   579     Uint8 state;
   580     Uint16 x, y;
   581 } SDL12_MouseButtonEvent;
   582 
   583 typedef struct
   584 {
   585     Uint8 type;
   586     Uint8 which;
   587     Uint8 axis;
   588     Sint16 value;
   589 } SDL12_JoyAxisEvent;
   590 
   591 typedef struct
   592 {
   593     Uint8 type;
   594     Uint8 which;
   595     Uint8 ball;
   596     Sint16 xrel;
   597     Sint16 yrel;
   598 } SDL12_JoyBallEvent;
   599 
   600 typedef struct
   601 {
   602     Uint8 type;
   603     Uint8 which;
   604     Uint8 hat;
   605     Uint8 value;
   606 } SDL12_JoyHatEvent;
   607 
   608 typedef struct
   609 {
   610     Uint8 type;
   611     Uint8 which;
   612     Uint8 button;
   613     Uint8 state;
   614 } SDL12_JoyButtonEvent;
   615 
   616 typedef struct
   617 {
   618     Uint8 type;
   619     int w;
   620     int h;
   621 } SDL12_ResizeEvent;
   622 
   623 typedef struct
   624 {
   625     Uint8 type;
   626 } SDL12_ExposeEvent;
   627 
   628 typedef struct
   629 {
   630     Uint8 type;
   631 } SDL12_QuitEvent;
   632 
   633 typedef struct
   634 {
   635     Uint8 type;
   636     int code;
   637     void *data1;
   638     void *data2;
   639 } SDL12_UserEvent;
   640 
   641 typedef struct
   642 {
   643     Uint8 type;
   644     void *msg;
   645 } SDL12_SysWMEvent;
   646 
   647 typedef union
   648 {
   649     Uint8 type;
   650     SDL12_ActiveEvent active;
   651     SDL12_KeyboardEvent key;
   652     SDL12_MouseMotionEvent motion;
   653     SDL12_MouseButtonEvent button;
   654     SDL12_JoyAxisEvent jaxis;
   655     SDL12_JoyBallEvent jball;
   656     SDL12_JoyHatEvent jhat;
   657     SDL12_JoyButtonEvent jbutton;
   658     SDL12_ResizeEvent resize;
   659     SDL12_ExposeEvent expose;
   660     SDL12_QuitEvent quit;
   661     SDL12_UserEvent user;
   662     SDL12_SysWMEvent syswm;
   663 } SDL12_Event;
   664 
   665 typedef int (SDLCALL *SDL12_EventFilter)(const SDL12_Event *event12);
   666 static int EventFilter20to12(void *data, SDL_Event *event20);
   667 
   668 typedef Uint32 (SDLCALL *SDL12_TimerCallback)(Uint32 interval);
   669 typedef SDL_TimerCallback SDL12_NewTimerCallback;
   670 
   671 typedef struct
   672 {
   673     SDL12_Rect area;
   674     Sint16 hot_x;
   675     Sint16 hot_y;
   676     Uint8 *data;
   677     Uint8 *mask;
   678     Uint8 *save[2];
   679     SDL_Cursor *wm_cursor;  /* the real SDL 1.2 has an opaque pointer to a platform-specific cursor here. */
   680 } SDL12_Cursor;
   681 
   682 typedef enum
   683 {
   684     SDL12_GL_RED_SIZE,
   685     SDL12_GL_GREEN_SIZE,
   686     SDL12_GL_BLUE_SIZE,
   687     SDL12_GL_ALPHA_SIZE,
   688     SDL12_GL_BUFFER_SIZE,
   689     SDL12_GL_DOUBLEBUFFER,
   690     SDL12_GL_DEPTH_SIZE,
   691     SDL12_GL_STENCIL_SIZE,
   692     SDL12_GL_ACCUM_RED_SIZE,
   693     SDL12_GL_ACCUM_GREEN_SIZE,
   694     SDL12_GL_ACCUM_BLUE_SIZE,
   695     SDL12_GL_ACCUM_ALPHA_SIZE,
   696     SDL12_GL_STEREO,
   697     SDL12_GL_MULTISAMPLEBUFFERS,
   698     SDL12_GL_MULTISAMPLESAMPLES,
   699     SDL12_GL_ACCELERATED_VISUAL,
   700     SDL12_GL_SWAP_CONTROL,
   701     SDL12_GL_MAX_ATTRIBUTE
   702 } SDL12_GLattr;
   703 
   704 
   705 typedef struct
   706 {
   707     Uint32 format;
   708     SDL12_Rect *modeslist12;
   709     SDL12_Rect **modes12;  /* ptrs to each item in modeslist, for SDL_ListModes() */
   710 } VideoModeList;
   711 
   712 typedef struct
   713 {
   714     int device_index;
   715     SDL_Joystick *joystick;
   716 } JoystickOpenedItem;
   717 
   718 // !!! FIXME: go through all of these.
   719 static VideoModeList *VideoModes = NULL;
   720 static int VideoModesCount = 0;
   721 static SDL12_VideoInfo VideoInfo12;
   722 static SDL_bool VideoWindowGrabbed = SDL_FALSE;
   723 static SDL_bool VideoCursorHidden = SDL_FALSE;
   724 static SDL_Window *VideoWindow20 = NULL;
   725 static SDL_Renderer *VideoRenderer20 = NULL;
   726 static SDL_Texture *VideoTexture20 = NULL;
   727 static SDL12_Surface *VideoSurface12 = NULL;
   728 static Uint32 VideoSurfacePresentTicks = 0;
   729 static Uint32 VideoSurfaceLastPresentTicks = 0;
   730 static SDL_Surface *VideoConvertSurface20 = NULL;
   731 static SDL_GLContext *VideoGLContext20 = NULL;
   732 static char *WindowTitle = NULL;
   733 static char *WindowIconTitle = NULL;
   734 static SDL_Surface *VideoIcon20 = NULL;
   735 static int EnabledUnicode = 0;
   736 static int VideoDisplayIndex = 0;
   737 static int CDRomInit = 0;
   738 static SDL12_EventFilter EventFilter12 = NULL;
   739 static SDL12_Cursor *CurrentCursor12 = NULL;
   740 static Uint8 EventStates[SDL12_NUMEVENTS];
   741 static int SwapInterval = 0;
   742 static JoystickOpenedItem JoystickOpenList[16];
   743 
   744 // !!! FIXME: need a mutex for the event queue.
   745 #define SDL12_MAXEVENTS 128
   746 typedef struct EventQueueType
   747 {
   748     SDL12_Event event12;
   749     struct EventQueueType *next;
   750 } EventQueueType;
   751 
   752 static EventQueueType EventQueuePool[SDL12_MAXEVENTS];
   753 static EventQueueType *EventQueueHead = NULL;
   754 static EventQueueType *EventQueueTail = NULL;
   755 static EventQueueType *EventQueueAvailable = NULL;
   756 
   757 
   758 /* Obviously we can't use SDL_LoadObject() to load SDL2.  :)  */
   759 #if defined(_WINDOWS)
   760     #define WIN32_LEAN_AND_MEAN 1
   761     #include <windows.h>
   762     #define SDL20_LIBNAME "SDL2.dll"
   763     static HANDLE Loaded_SDL20 = NULL;
   764     #define LoadSDL20Library() ((Loaded_SDL20 = LoadLibraryA(SDL20_LIBNAME)) != NULL)
   765     #define LookupSDL20Sym(sym) GetProcAddress(Loaded_SDL20, sym)
   766     #define CloseSDL20Library() { { if (Loaded_SDL20) { FreeLibrary(Loaded_SDL20); Loaded_SDL20 = NULL; } }
   767 #elif defined(unix) || defined(__APPLE__)
   768     #include <dlfcn.h>
   769     #ifdef __APPLE__
   770     #define SDL20_LIBNAME "libSDL2.dylib"
   771     #else
   772     #define SDL20_LIBNAME "libSDL2-2.0.so.0"
   773     #endif
   774     static void *Loaded_SDL20 = NULL;
   775     #define LoadSDL20Library() ((Loaded_SDL20 = dlopen(SDL20_LIBNAME, RTLD_LOCAL|RTLD_NOW)) != NULL)
   776     #define LookupSDL20Sym(sym) dlsym(Loaded_SDL20, sym)
   777     #define CloseSDL20Library() { if (Loaded_SDL20) { dlclose(Loaded_SDL20); Loaded_SDL20 = NULL; } }
   778 #else
   779     #error Please define your platform.
   780 #endif
   781 
   782 static void *
   783 LoadSDL20Symbol(const char *fn, int *okay)
   784 {
   785     void *retval = NULL;
   786     if (*okay) { /* only bother trying if we haven't previously failed. */
   787         retval = LookupSDL20Sym(fn);
   788         if (retval == NULL) {
   789             /* Flip to 1 to warn but maybe work if nothing calls that function, flip to zero to fail out. */
   790             #if 0
   791             fprintf(stderr, "WARNING: LOAD FAILED: %s\n", fn);
   792             #else
   793             *okay = 0;
   794             #endif
   795         }
   796     }
   797     return retval;
   798 }
   799 
   800 static void
   801 UnloadSDL20(void)
   802 {
   803     #define SDL20_SYM(rc,fn,params,args,ret) SDL20_##fn = NULL;
   804     #include "SDL20_syms.h"
   805     CloseSDL20Library();
   806 }
   807 
   808 static int
   809 LoadSDL20(void)
   810 {
   811     int okay = 1;
   812     if (!Loaded_SDL20)
   813     {
   814         okay = LoadSDL20Library();
   815         #define SDL20_SYM(rc,fn,params,args,ret) SDL20_##fn = (SDL20_##fn##_t) LoadSDL20Symbol("SDL_" #fn, &okay);
   816         #include "SDL20_syms.h"
   817         if (!okay)
   818             UnloadSDL20();
   819     }
   820     return okay;
   821 }
   822 
   823 static void dllinit(void) __attribute__((constructor));
   824 static void dllinit(void)
   825 {
   826     if (!LoadSDL20()) {
   827         fprintf(stderr, "ERROR: sdl12-compat failed to load SDL 2.0! Aborting!\n");
   828         fflush(stderr);
   829         abort();
   830     }
   831 }
   832 
   833 static void dllquit(void) __attribute__((destructor));
   834 static void dllquit(void)
   835 {
   836     UnloadSDL20();
   837 }
   838 
   839 DECLSPEC const SDL_version * SDLCALL
   840 SDL_Linked_Version(void)
   841 {
   842     static const SDL_version version = { 1, 2, SDL12_COMPAT_VERSION };
   843     return &version;
   844 }
   845 
   846 DECLSPEC int SDLCALL
   847 SDL_sscanf(const char *text, const char *fmt, ...)
   848 {
   849     int retval;
   850     va_list ap;
   851     va_start(ap, fmt);
   852     retval = (int) SDL20_sscanf(text, fmt, ap);
   853     va_end(ap);
   854     return retval;
   855 }
   856 
   857 DECLSPEC int SDLCALL
   858 SDL_snprintf(char *text, size_t maxlen, const char *fmt, ...)
   859 {
   860     int retval;
   861     va_list ap;
   862     va_start(ap, fmt);
   863     retval = (int) SDL20_vsnprintf(text, maxlen, fmt, ap);
   864     va_end(ap);
   865     return retval;
   866 }
   867 
   868 DECLSPEC void * SDLCALL
   869 SDL_revcpy(void *dst, const void *src, size_t len)
   870 {
   871     /* this doesn't reverse the data...I think this was just a memcpy that
   872        was meant to be CPU-cache friendly if you knew you were working with
   873        data going backwards in memory, instead of jumping over pages to copy
   874        from the start...? Whatever, just do a memcpy here. */
   875     return SDL_memcpy(dst, src, len);
   876 }
   877 
   878 
   879 DECLSPEC SDL_bool SDLCALL
   880 SDL_HasMMXExt(void)
   881 {
   882     /* this isn't accurate, but SDL2 doesn't have this for some reason.
   883         MMXExt is available in all SSE1 machines, except early Athlon chips,
   884         so we'll just say it's available if they have SSE1. Oh well. */
   885     return SDL20_HasSSE();
   886 }
   887 
   888 DECLSPEC SDL_bool SDLCALL
   889 SDL_Has3DNowExt(void)
   890 {
   891     FIXME("check this");
   892     return SDL20_HasSSE();
   893 }
   894 
   895 DECLSPEC SDL_Joystick * SDLCALL
   896 SDL_JoystickOpen(int device_index)
   897 {
   898     int i;
   899     SDL20_LockJoysticks();
   900     for (i = 0; i < SDL_arraysize(JoystickOpenList); i++) {
   901         if (JoystickOpenList[i].joystick == NULL) {
   902             break;
   903         }
   904     }
   905 
   906     if (i == SDL_arraysize(JoystickOpenList)) {
   907         SDL20_UnlockJoysticks();
   908         SDL20_SetError("Too many open joysticks");
   909         return NULL;
   910     }
   911 
   912     JoystickOpenList[i].joystick = SDL20_JoystickOpen(device_index);
   913     if (JoystickOpenList[i].joystick) {
   914         JoystickOpenList[i].device_index = device_index;
   915     }
   916 
   917     SDL20_UnlockJoysticks();
   918     return JoystickOpenList[i].joystick;
   919 }
   920 
   921 DECLSPEC void SDLCALL
   922 SDL_JoystickClose(SDL_Joystick *joystick)
   923 {
   924     int i;
   925     SDL20_LockJoysticks();
   926     for (i = 0; i < SDL_arraysize(JoystickOpenList); i++) {
   927         if (JoystickOpenList[i].joystick == joystick) {
   928             break;
   929         }
   930     }
   931 
   932     if (i < SDL_arraysize(JoystickOpenList)) {
   933         JoystickOpenList[i].joystick = NULL;
   934     }
   935 
   936     SDL20_UnlockJoysticks();
   937 
   938     SDL20_JoystickClose(joystick);
   939 }
   940 
   941 DECLSPEC const char * SDLCALL
   942 SDL_JoystickName(int device_index)
   943 {
   944     return SDL20_JoystickNameForIndex(device_index);
   945 }
   946 
   947 DECLSPEC int SDLCALL
   948 SDL_JoystickIndex(SDL_Joystick *joystick)
   949 {
   950     int i;
   951 
   952     SDL20_LockJoysticks(); {
   953         for (i = 0; i < SDL_arraysize(JoystickOpenList); i++) {
   954             if (JoystickOpenList[i].joystick == joystick) {
   955                 break;
   956             }
   957         }
   958 
   959         if (i < SDL_arraysize(JoystickOpenList)) {
   960             SDL20_UnlockJoysticks();
   961             return JoystickOpenList[i].device_index;
   962         }
   963 
   964     }
   965     SDL20_UnlockJoysticks();
   966     return SDL20_SetError("Can't find joystick");
   967 }
   968 
   969 DECLSPEC int SDLCALL
   970 SDL_JoystickOpened(int device_index)
   971 {
   972     int retval = 0;
   973     int i;
   974     SDL20_LockJoysticks();
   975     for (i = 0; i < SDL_arraysize(JoystickOpenList); i++) {
   976         if ((JoystickOpenList[i].joystick) && (JoystickOpenList[i].device_index == device_index)) {
   977             retval = 1;
   978             break;
   979         }
   980     }
   981     SDL20_UnlockJoysticks();
   982     return retval;
   983 }
   984 
   985 static int
   986 GetVideoDisplay()
   987 {
   988     FIXME("cache this value during SDL_Init() so it doesn't change.");
   989     const char *variable = SDL20_getenv("SDL_VIDEO_FULLSCREEN_DISPLAY");
   990     if ( !variable ) {
   991         variable = SDL20_getenv("SDL_VIDEO_FULLSCREEN_HEAD");
   992     }
   993     if ( variable ) {
   994         return SDL20_atoi(variable);
   995     } else {
   996         return 0;
   997     }
   998 }
   999 
  1000 /* This sets up VideoModes and VideoModesCount. You end up with arrays by pixel
  1001     format, each with a value that 1.2's SDL_ListModes() can return. */
  1002 static int
  1003 Init12VidModes(void)
  1004 {
  1005     const int total = SDL20_GetNumDisplayModes(VideoDisplayIndex);
  1006     VideoModeList *vmode = NULL;
  1007     int num_modes = 0;
  1008     void *ptr = NULL;
  1009     int i, j;
  1010 
  1011     if (VideoModesCount > 0) {
  1012         return 0;  // already did this.
  1013     }
  1014 
  1015     SDL_assert(VideoModes == NULL);
  1016 
  1017     for (i = 0; i < total; ++i) {
  1018         SDL_DisplayMode mode;
  1019 
  1020         if (SDL20_GetDisplayMode(VideoDisplayIndex, i, &mode) == -1) {
  1021             continue;
  1022         } else if (!mode.w || !mode.h) {
  1023             SDL_assert(0 && "Can this actually happen?");
  1024             continue;
  1025         }
  1026 
  1027         if (!vmode || (mode.format != vmode->format)) {  // SDL20_GetDisplayMode() sorts on bpp first. We know when to change arrays.
  1028             if (VideoModesCount > 0) {
  1029                 VideoModes[VideoModesCount-1].modes12[num_modes] = NULL;
  1030             }
  1031             ptr = (VideoModeList *) SDL20_realloc(VideoModes, sizeof (VideoModeList) * (VideoModesCount+1));
  1032             if (!ptr) {
  1033                 return SDL20_OutOfMemory();
  1034             }
  1035             VideoModes = (VideoModeList *) ptr;
  1036             vmode = &VideoModes[VideoModesCount];
  1037             vmode->format = mode.format;
  1038             vmode->modeslist12 = NULL;
  1039             vmode->modes12 = NULL;
  1040             VideoModesCount++;
  1041             num_modes = 0;
  1042         }
  1043 
  1044         /* make sure we don't have this one already (with a different refresh rate, etc). */
  1045         for (j = 0; j < num_modes; j++) {
  1046             if ((vmode->modeslist12[j].w == mode.w) && (vmode->modeslist12[j].h == mode.h)) {
  1047                 break;
  1048             }
  1049         }
  1050 
  1051         if (j < num_modes) {
  1052             continue;  /* already have this one. */
  1053         }
  1054 
  1055         FIXME("Make sure mode dimensions fit in 16-bits for SDL12_Rect");
  1056 
  1057         ptr = SDL20_realloc(vmode->modes12, sizeof (SDL12_Rect *) * (num_modes + 2));
  1058         if (ptr == NULL) {
  1059             return SDL20_OutOfMemory();
  1060         }
  1061         vmode->modes12 = (SDL12_Rect **) ptr;
  1062 
  1063         ptr = SDL20_realloc(vmode->modeslist12, sizeof (SDL12_Rect) * (num_modes + 1));
  1064         if (ptr == NULL) {
  1065             return SDL20_OutOfMemory();
  1066         }
  1067         vmode->modeslist12 = (SDL12_Rect *) ptr;
  1068 
  1069         vmode->modeslist12[num_modes].x = 0;
  1070         vmode->modeslist12[num_modes].y = 0;
  1071         vmode->modeslist12[num_modes].w = mode.w;
  1072         vmode->modeslist12[num_modes].h = mode.h;
  1073 
  1074         vmode->modes12[num_modes] = &vmode->modeslist12[num_modes];
  1075 
  1076         num_modes++;
  1077     }
  1078 
  1079     if (VideoModesCount > 0) {
  1080         VideoModes[VideoModesCount-1].modes12[num_modes] = NULL;
  1081     }
  1082 
  1083     return 0;
  1084 }
  1085 
  1086 static int
  1087 Init12Video(void)
  1088 {
  1089     int i;
  1090 
  1091     for (i = 0; i < SDL12_MAXEVENTS-1; i++)
  1092         EventQueuePool[i].next = &EventQueuePool[i+1];
  1093     EventQueuePool[SDL12_MAXEVENTS-1].next = NULL;
  1094 
  1095     EventQueueHead = EventQueueTail = NULL;
  1096     EventQueueAvailable = EventQueuePool;
  1097 
  1098     SDL_memset(EventStates, SDL_ENABLE, sizeof (EventStates)); /* on by default */
  1099     EventStates[SDL12_SYSWMEVENT] = SDL_IGNORE;  /* off by default. */
  1100 
  1101     SDL20_SetEventFilter(EventFilter20to12, NULL);
  1102 
  1103     VideoDisplayIndex = GetVideoDisplay();
  1104     SwapInterval = 0;
  1105 
  1106     VideoWindowGrabbed = SDL_FALSE;
  1107     VideoCursorHidden = SDL_FALSE;
  1108     SDL20_ShowCursor(1);
  1109 
  1110     if (Init12VidModes() == -1) {
  1111         return -1;
  1112     }
  1113 
  1114     return 0;
  1115 }
  1116 
  1117 
  1118 
  1119 
  1120 DECLSPEC int SDLCALL
  1121 SDL_InitSubSystem(Uint32 sdl12flags)
  1122 {
  1123     FIXME("there is never a parachute in SDL2, should we catch segfaults ourselves?");
  1124 
  1125     FIXME("support event thread where it makes sense to do so?");
  1126 
  1127     if ( (sdl12flags & SDL12_INIT_EVENTTHREAD) == SDL12_INIT_EVENTTHREAD ) {
  1128         return SDL20_SetError("OS doesn't support threaded events");
  1129     }
  1130 
  1131     Uint32 sdl20flags = 0;
  1132     int rc;
  1133 
  1134 #ifdef __MACOSX__
  1135     extern void sdl12_compat_macos_init(void);
  1136     sdl12_compat_macos_init();
  1137 #endif
  1138 
  1139     #define SETFLAG(flag) if (sdl12flags & SDL12_INIT_##flag) sdl20flags |= SDL_INIT_##flag
  1140     SETFLAG(TIMER);
  1141     SETFLAG(AUDIO);
  1142     SETFLAG(VIDEO);
  1143     SETFLAG(JOYSTICK);
  1144     SETFLAG(NOPARACHUTE);
  1145     #undef SETFLAG
  1146 
  1147     // There's no CDROM in 2.0, but we'll just pretend it succeeded.
  1148     if (sdl12flags & SDL12_INIT_CDROM)
  1149         CDRomInit = 1;
  1150 
  1151     FIXME("do something about SDL12_INIT_EVENTTHREAD");
  1152 
  1153     rc = SDL20_Init(sdl20flags);
  1154     if ((rc == 0) && (sdl20flags & SDL_INIT_VIDEO)) {
  1155         if (Init12Video() == -1) {
  1156             FIXME("should we deinit other subsystems?");
  1157             return -1;
  1158         }
  1159     }
  1160 
  1161     return rc;
  1162 }
  1163 
  1164 DECLSPEC int SDLCALL
  1165 SDL_Init(Uint32 sdl12flags)
  1166 {
  1167     FIXME("what was different in 1.2?");
  1168     return SDL_InitSubSystem(sdl12flags);   /* there's no difference betwee Init and InitSubSystem in SDL2. */
  1169 }
  1170 
  1171 
  1172 static void
  1173 InitFlags12To20(const Uint32 flags12, Uint32 *_flags20, Uint32 *_extraflags)
  1174 {
  1175     Uint32 flags20 = 0;
  1176     Uint32 extraflags = 0;
  1177 
  1178     #define SETFLAG(flag) if (flags12 & SDL12_INIT_##flag) flags20 |= SDL_INIT_##flag
  1179     SETFLAG(TIMER);
  1180     SETFLAG(AUDIO);
  1181     SETFLAG(VIDEO);
  1182     SETFLAG(JOYSTICK);
  1183     SETFLAG(NOPARACHUTE);
  1184     #undef SETFLAG
  1185 
  1186     if ((flags12 & SDL12_INIT_CDROM) && (CDRomInit)) {
  1187         extraflags |= SDL12_INIT_CDROM;
  1188     }
  1189 
  1190     FIXME("do something about SDL12_INIT_EVENTTHREAD");
  1191 
  1192     *_flags20 = flags20;
  1193     *_extraflags = extraflags;
  1194 }
  1195 
  1196 static Uint32
  1197 InitFlags20to12(const Uint32 flags20)
  1198 {
  1199     Uint32 flags12 = 0;
  1200 
  1201     #define SETFLAG(flag) if (flags20 & SDL_INIT_##flag) flags12 |= SDL12_INIT_##flag
  1202     SETFLAG(TIMER);
  1203     SETFLAG(AUDIO);
  1204     SETFLAG(VIDEO);
  1205     SETFLAG(JOYSTICK);
  1206     SETFLAG(NOPARACHUTE);
  1207     #undef SETFLAG
  1208 
  1209     return flags12;
  1210 }
  1211 
  1212 
  1213 DECLSPEC Uint32 SDLCALL
  1214 SDL_WasInit(Uint32 sdl12flags)
  1215 {
  1216     Uint32 sdl20flags, extraflags;
  1217     InitFlags12To20(sdl12flags, &sdl20flags, &extraflags);
  1218 
  1219     return InitFlags20to12(SDL20_WasInit(sdl20flags)) | extraflags;
  1220 }
  1221 
  1222 static void
  1223 Quit12Video(void)
  1224 {
  1225     int i;
  1226 
  1227     SDL20_FreeSurface(VideoIcon20);
  1228     VideoIcon20 = NULL;
  1229 
  1230     for (i = 0; i < VideoModesCount; i++) {
  1231         SDL20_free(VideoModes[i].modeslist12);
  1232         SDL20_free(VideoModes[i].modes12);
  1233     }
  1234     SDL20_free(VideoModes);
  1235 
  1236     SDL20_FreeFormat(VideoInfo12.vfmt);
  1237     SDL20_zero(VideoInfo12);
  1238 
  1239     EventFilter12 = NULL;
  1240     EventQueueAvailable = EventQueueHead = EventQueueTail = NULL;
  1241     CurrentCursor12 = NULL;
  1242     VideoModes = NULL;
  1243     VideoModesCount = 0;
  1244 }
  1245 
  1246 DECLSPEC void SDLCALL
  1247 SDL_QuitSubSystem(Uint32 sdl12flags)
  1248 {
  1249     Uint32 sdl20flags, extraflags;
  1250     InitFlags12To20(sdl12flags, &sdl20flags, &extraflags);
  1251 
  1252     if (extraflags & SDL12_INIT_CDROM) {
  1253         CDRomInit = 0;
  1254     }
  1255 
  1256     FIXME("reset a bunch of other global variables too.");
  1257     if (sdl12flags & SDL12_INIT_VIDEO) {
  1258         Quit12Video();
  1259     }
  1260 
  1261     FIXME("do something about SDL12_INIT_EVENTTHREAD");
  1262     SDL20_QuitSubSystem(sdl20flags);
  1263 
  1264     if ((SDL20_WasInit(0) == 0) && (!CDRomInit)) {
  1265         SDL20_Quit();
  1266     }
  1267 }
  1268 
  1269 DECLSPEC void SDLCALL
  1270 SDL_Quit(void)
  1271 {
  1272     SDL_QuitSubSystem(SDL_WasInit(0) | SDL12_INIT_CDROM);
  1273 }
  1274 
  1275 DECLSPEC void SDLCALL
  1276 SDL_SetError(const char *fmt, ...)
  1277 {
  1278     char ch;
  1279     char *str = NULL;
  1280     size_t len = 0;
  1281     va_list ap;
  1282 
  1283     va_start(ap, fmt);
  1284     len = SDL20_vsnprintf(&ch, 1, fmt, ap);
  1285     va_end(ap);
  1286 
  1287     str = (char *) SDL20_malloc(len + 1);
  1288     if (!str)
  1289         SDL20_OutOfMemory();
  1290     else
  1291     {
  1292         va_start(ap, fmt);
  1293         SDL20_vsnprintf(str, len + 1, fmt, ap);
  1294         va_end(ap);
  1295         SDL20_SetError("%s", str);
  1296         SDL20_free(str);
  1297     }
  1298 }
  1299 
  1300 DECLSPEC const char * SDLCALL
  1301 SDL_GetError(void)
  1302 {
  1303     if (SDL20_GetError == NULL)
  1304     {
  1305         static const char noload_errstr[] = "The SDL 2.0 library that the 1.2 compatibility layer needs isn't loaded";
  1306         return noload_errstr;
  1307     }
  1308     return SDL20_GetError();
  1309 }
  1310 
  1311 
  1312 static const char *
  1313 GetDriverName(const char *name, char *namebuf, int maxlen)
  1314 {
  1315     if (name) {
  1316         if (namebuf) {
  1317             SDL20_strlcpy(namebuf, name, maxlen);
  1318             return namebuf;
  1319         } else {
  1320             return name;
  1321         }
  1322     }
  1323     return NULL;
  1324 }
  1325 
  1326 DECLSPEC const char * SDLCALL
  1327 SDL_AudioDriverName(char *namebuf, int maxlen)
  1328 {
  1329     return GetDriverName(SDL20_GetCurrentAudioDriver(), namebuf, maxlen);
  1330 }
  1331 
  1332 DECLSPEC const char * SDLCALL
  1333 SDL_VideoDriverName(char *namebuf, int maxlen)
  1334 {
  1335     return GetDriverName(SDL20_GetCurrentVideoDriver(), namebuf, maxlen);
  1336 }
  1337 
  1338 
  1339 DECLSPEC int SDLCALL
  1340 SDL_PollEvent(SDL12_Event *event12)
  1341 {
  1342     EventQueueType *next;
  1343 
  1344     SDL_PumpEvents();  /* this will run our filter and build our 1.2 queue. */
  1345 
  1346     if (EventQueueHead == NULL) {
  1347         return 0;  /* no events at the moment. */
  1348     }
  1349 
  1350     SDL_memcpy(event12, &EventQueueHead->event12, sizeof (SDL12_Event));
  1351     next = EventQueueHead->next;
  1352     EventQueueHead->next = EventQueueAvailable;
  1353     EventQueueAvailable = EventQueueHead;
  1354     EventQueueHead = next;
  1355     if (!next) {
  1356         EventQueueTail = NULL;
  1357     }
  1358 
  1359     return 1;
  1360 }
  1361 
  1362 DECLSPEC int SDLCALL
  1363 SDL_PushEvent(SDL12_Event *event12)
  1364 {
  1365     EventQueueType *item = EventQueueAvailable;
  1366     if (item == NULL) {
  1367         return -1;  /* no space available at the moment. */
  1368     }
  1369 
  1370     EventQueueAvailable = item->next;
  1371     if (EventQueueTail) {
  1372         EventQueueTail->next = item;
  1373         EventQueueTail = item;
  1374     } else {
  1375         EventQueueHead = EventQueueTail = item;
  1376     }
  1377     item->next = NULL;
  1378 
  1379     SDL_memcpy(&item->event12, event12, sizeof (SDL12_Event));
  1380 
  1381     return 0;
  1382 }
  1383 
  1384 DECLSPEC int SDLCALL
  1385 SDL_PeepEvents(SDL12_Event *events12, int numevents, SDL_eventaction action, Uint32 mask)
  1386 {
  1387     if (action == SDL_ADDEVENT)
  1388     {
  1389         int i;
  1390         for (i = 0; i < numevents; i++)
  1391         {
  1392             if (SDL_PushEvent(&events12[i]) == -1)
  1393                 break;  /* out of space for more events. */
  1394         }
  1395         return i;
  1396     }
  1397     else if ((action == SDL_PEEKEVENT) || (action == SDL_GETEVENT))
  1398     {
  1399         const SDL_bool isGet = (action == SDL_GETEVENT);
  1400         EventQueueType *prev = NULL;
  1401         EventQueueType *item = EventQueueHead;
  1402         EventQueueType *next = NULL;
  1403         int chosen = 0;
  1404         while (chosen < numevents)
  1405         {
  1406             EventQueueType *nextPrev = item;
  1407             if (!item)
  1408                 break;  /* no more events at the moment. */
  1409 
  1410             next = item->next;  /* copy, since we might overwrite item->next */
  1411 
  1412             if (mask & (1<<item->event12.type))
  1413             {
  1414                 SDL_memcpy(&events12[chosen++], &item->event12, sizeof (SDL12_Event));
  1415                 if (isGet)  /* remove from list? */
  1416                 {
  1417                     if (prev != NULL)
  1418                         prev->next = next;
  1419                     if (item == EventQueueHead)
  1420                         EventQueueHead = next;
  1421                     if (item == EventQueueTail)
  1422                         EventQueueTail = prev;
  1423 
  1424                     /* put it back in the free pool. */
  1425                     item->next = EventQueueAvailable;
  1426                     EventQueueAvailable = item;
  1427                     nextPrev = prev;  /* previous item doesn't change. */
  1428                 }
  1429             }
  1430 
  1431             item = next;
  1432             prev = nextPrev;
  1433         }
  1434         return chosen;
  1435     }
  1436 
  1437     return 0;
  1438 }
  1439 
  1440 DECLSPEC int SDLCALL
  1441 SDL_WaitEvent(SDL12_Event *event12)
  1442 {
  1443     FIXME("In 1.2, this only fails (-1) if you haven't SDL_Init()'d.");
  1444     while (!SDL_PollEvent(event12))
  1445         SDL20_Delay(10);
  1446     return 1;
  1447 }
  1448 
  1449 static SDL_bool
  1450 PushEventIfNotFiltered(SDL12_Event *event12)
  1451 {
  1452     if (event12->type != SDL12_NOEVENT)
  1453     {
  1454         if (EventStates[event12->type] != SDL_IGNORE)
  1455         {
  1456             if ((!EventFilter12) || (EventFilter12(event12)))
  1457                 return (SDL_PushEvent(event12) == 0);
  1458         }
  1459     }
  1460     return SDL_FALSE;
  1461 }
  1462 
  1463 DECLSPEC Uint8 SDLCALL
  1464 SDL_EventState(Uint8 type, int state)
  1465 {
  1466     /* the values of "state" match between 1.2 and 2.0 */
  1467     const Uint8 retval = EventStates[type];
  1468     SDL12_Event e;
  1469 
  1470     if (state != SDL_QUERY)
  1471         EventStates[type] = state;
  1472     if (state == SDL_IGNORE)  /* drop existing events of this type. */
  1473         while (SDL_PeepEvents(&e, 1, SDL_GETEVENT, (1<<type))) {}
  1474 
  1475     return retval;
  1476 }
  1477 
  1478 DECLSPEC Uint8 SDLCALL
  1479 SDL_GetMouseState(int *x, int *y)
  1480 {
  1481     const Uint32 state20 = SDL20_GetMouseState(x, y);
  1482     Uint8 retval = (state20 & 0x7);  /* left, right, and middle will match. */
  1483 
  1484     /* the X[12] buttons are different in 1.2; mousewheel was in the way. */
  1485     if (state20 & SDL_BUTTON(SDL_BUTTON_X1))
  1486         retval |= (1<<5);
  1487     if (state20 & SDL_BUTTON(SDL_BUTTON_X2))
  1488         retval |= (1<<6);
  1489 
  1490     return retval;
  1491 }
  1492 
  1493 DECLSPEC char * SDLCALL
  1494 SDL_GetKeyName(SDL12Key key)
  1495 {
  1496     switch (key) {
  1497         #define CASESDLK12TONAME(k, n) case k: return (char *) n
  1498 	    CASESDLK12TONAME(SDLK12_BACKSPACE, "backspace");
  1499 	    CASESDLK12TONAME(SDLK12_TAB, "tab");
  1500 	    CASESDLK12TONAME(SDLK12_CLEAR, "clear");
  1501 	    CASESDLK12TONAME(SDLK12_RETURN, "return");
  1502 	    CASESDLK12TONAME(SDLK12_PAUSE, "pause");
  1503 	    CASESDLK12TONAME(SDLK12_ESCAPE, "escape");
  1504 	    CASESDLK12TONAME(SDLK12_SPACE, "space");
  1505 	    CASESDLK12TONAME(SDLK12_EXCLAIM, "!");
  1506 	    CASESDLK12TONAME(SDLK12_QUOTEDBL, "\"");
  1507 	    CASESDLK12TONAME(SDLK12_HASH, "#");
  1508 	    CASESDLK12TONAME(SDLK12_DOLLAR, "$");
  1509 	    CASESDLK12TONAME(SDLK12_AMPERSAND, "&");
  1510 	    CASESDLK12TONAME(SDLK12_QUOTE, "'");
  1511 	    CASESDLK12TONAME(SDLK12_LEFTPAREN, "(");
  1512 	    CASESDLK12TONAME(SDLK12_RIGHTPAREN, ")");
  1513 	    CASESDLK12TONAME(SDLK12_ASTERISK, "*");
  1514 	    CASESDLK12TONAME(SDLK12_PLUS, "+");
  1515 	    CASESDLK12TONAME(SDLK12_COMMA, ",");
  1516 	    CASESDLK12TONAME(SDLK12_MINUS, "-");
  1517 	    CASESDLK12TONAME(SDLK12_PERIOD, ".");
  1518 	    CASESDLK12TONAME(SDLK12_SLASH, "/");
  1519 	    CASESDLK12TONAME(SDLK12_0, "0");
  1520 	    CASESDLK12TONAME(SDLK12_1, "1");
  1521 	    CASESDLK12TONAME(SDLK12_2, "2");
  1522 	    CASESDLK12TONAME(SDLK12_3, "3");
  1523 	    CASESDLK12TONAME(SDLK12_4, "4");
  1524 	    CASESDLK12TONAME(SDLK12_5, "5");
  1525 	    CASESDLK12TONAME(SDLK12_6, "6");
  1526 	    CASESDLK12TONAME(SDLK12_7, "7");
  1527 	    CASESDLK12TONAME(SDLK12_8, "8");
  1528 	    CASESDLK12TONAME(SDLK12_9, "9");
  1529 	    CASESDLK12TONAME(SDLK12_COLON, ":");
  1530 	    CASESDLK12TONAME(SDLK12_SEMICOLON, ");");
  1531 	    CASESDLK12TONAME(SDLK12_LESS, "<");
  1532 	    CASESDLK12TONAME(SDLK12_EQUALS, "=");
  1533 	    CASESDLK12TONAME(SDLK12_GREATER, ">");
  1534 	    CASESDLK12TONAME(SDLK12_QUESTION, "?");
  1535 	    CASESDLK12TONAME(SDLK12_AT, "@");
  1536 	    CASESDLK12TONAME(SDLK12_LEFTBRACKET, "[");
  1537 	    CASESDLK12TONAME(SDLK12_BACKSLASH, "\\");
  1538 	    CASESDLK12TONAME(SDLK12_RIGHTBRACKET, "]");
  1539 	    CASESDLK12TONAME(SDLK12_CARET, "^");
  1540 	    CASESDLK12TONAME(SDLK12_UNDERSCORE, "_");
  1541 	    CASESDLK12TONAME(SDLK12_BACKQUOTE, "`");
  1542 	    CASESDLK12TONAME(SDLK12_a, "a");
  1543 	    CASESDLK12TONAME(SDLK12_b, "b");
  1544 	    CASESDLK12TONAME(SDLK12_c, "c");
  1545 	    CASESDLK12TONAME(SDLK12_d, "d");
  1546 	    CASESDLK12TONAME(SDLK12_e, "e");
  1547 	    CASESDLK12TONAME(SDLK12_f, "f");
  1548 	    CASESDLK12TONAME(SDLK12_g, "g");
  1549 	    CASESDLK12TONAME(SDLK12_h, "h");
  1550 	    CASESDLK12TONAME(SDLK12_i, "i");
  1551 	    CASESDLK12TONAME(SDLK12_j, "j");
  1552 	    CASESDLK12TONAME(SDLK12_k, "k");
  1553 	    CASESDLK12TONAME(SDLK12_l, "l");
  1554 	    CASESDLK12TONAME(SDLK12_m, "m");
  1555 	    CASESDLK12TONAME(SDLK12_n, "n");
  1556 	    CASESDLK12TONAME(SDLK12_o, "o");
  1557 	    CASESDLK12TONAME(SDLK12_p, "p");
  1558 	    CASESDLK12TONAME(SDLK12_q, "q");
  1559 	    CASESDLK12TONAME(SDLK12_r, "r");
  1560 	    CASESDLK12TONAME(SDLK12_s, "s");
  1561 	    CASESDLK12TONAME(SDLK12_t, "t");
  1562 	    CASESDLK12TONAME(SDLK12_u, "u");
  1563 	    CASESDLK12TONAME(SDLK12_v, "v");
  1564 	    CASESDLK12TONAME(SDLK12_w, "w");
  1565 	    CASESDLK12TONAME(SDLK12_x, "x");
  1566 	    CASESDLK12TONAME(SDLK12_y, "y");
  1567 	    CASESDLK12TONAME(SDLK12_z, "z");
  1568 	    CASESDLK12TONAME(SDLK12_DELETE, "delete");
  1569 
  1570 	    CASESDLK12TONAME(SDLK12_WORLD_0, "world 0");
  1571 	    CASESDLK12TONAME(SDLK12_WORLD_1, "world 1");
  1572 	    CASESDLK12TONAME(SDLK12_WORLD_2, "world 2");
  1573 	    CASESDLK12TONAME(SDLK12_WORLD_3, "world 3");
  1574 	    CASESDLK12TONAME(SDLK12_WORLD_4, "world 4");
  1575 	    CASESDLK12TONAME(SDLK12_WORLD_5, "world 5");
  1576 	    CASESDLK12TONAME(SDLK12_WORLD_6, "world 6");
  1577 	    CASESDLK12TONAME(SDLK12_WORLD_7, "world 7");
  1578 	    CASESDLK12TONAME(SDLK12_WORLD_8, "world 8");
  1579 	    CASESDLK12TONAME(SDLK12_WORLD_9, "world 9");
  1580 	    CASESDLK12TONAME(SDLK12_WORLD_10, "world 10");
  1581 	    CASESDLK12TONAME(SDLK12_WORLD_11, "world 11");
  1582 	    CASESDLK12TONAME(SDLK12_WORLD_12, "world 12");
  1583 	    CASESDLK12TONAME(SDLK12_WORLD_13, "world 13");
  1584 	    CASESDLK12TONAME(SDLK12_WORLD_14, "world 14");
  1585 	    CASESDLK12TONAME(SDLK12_WORLD_15, "world 15");
  1586 	    CASESDLK12TONAME(SDLK12_WORLD_16, "world 16");
  1587 	    CASESDLK12TONAME(SDLK12_WORLD_17, "world 17");
  1588 	    CASESDLK12TONAME(SDLK12_WORLD_18, "world 18");
  1589 	    CASESDLK12TONAME(SDLK12_WORLD_19, "world 19");
  1590 	    CASESDLK12TONAME(SDLK12_WORLD_20, "world 20");
  1591 	    CASESDLK12TONAME(SDLK12_WORLD_21, "world 21");
  1592 	    CASESDLK12TONAME(SDLK12_WORLD_22, "world 22");
  1593 	    CASESDLK12TONAME(SDLK12_WORLD_23, "world 23");
  1594 	    CASESDLK12TONAME(SDLK12_WORLD_24, "world 24");
  1595 	    CASESDLK12TONAME(SDLK12_WORLD_25, "world 25");
  1596 	    CASESDLK12TONAME(SDLK12_WORLD_26, "world 26");
  1597 	    CASESDLK12TONAME(SDLK12_WORLD_27, "world 27");
  1598 	    CASESDLK12TONAME(SDLK12_WORLD_28, "world 28");
  1599 	    CASESDLK12TONAME(SDLK12_WORLD_29, "world 29");
  1600 	    CASESDLK12TONAME(SDLK12_WORLD_30, "world 30");
  1601 	    CASESDLK12TONAME(SDLK12_WORLD_31, "world 31");
  1602 	    CASESDLK12TONAME(SDLK12_WORLD_32, "world 32");
  1603 	    CASESDLK12TONAME(SDLK12_WORLD_33, "world 33");
  1604 	    CASESDLK12TONAME(SDLK12_WORLD_34, "world 34");
  1605 	    CASESDLK12TONAME(SDLK12_WORLD_35, "world 35");
  1606 	    CASESDLK12TONAME(SDLK12_WORLD_36, "world 36");
  1607 	    CASESDLK12TONAME(SDLK12_WORLD_37, "world 37");
  1608 	    CASESDLK12TONAME(SDLK12_WORLD_38, "world 38");
  1609 	    CASESDLK12TONAME(SDLK12_WORLD_39, "world 39");
  1610 	    CASESDLK12TONAME(SDLK12_WORLD_40, "world 40");
  1611 	    CASESDLK12TONAME(SDLK12_WORLD_41, "world 41");
  1612 	    CASESDLK12TONAME(SDLK12_WORLD_42, "world 42");
  1613 	    CASESDLK12TONAME(SDLK12_WORLD_43, "world 43");
  1614 	    CASESDLK12TONAME(SDLK12_WORLD_44, "world 44");
  1615 	    CASESDLK12TONAME(SDLK12_WORLD_45, "world 45");
  1616 	    CASESDLK12TONAME(SDLK12_WORLD_46, "world 46");
  1617 	    CASESDLK12TONAME(SDLK12_WORLD_47, "world 47");
  1618 	    CASESDLK12TONAME(SDLK12_WORLD_48, "world 48");
  1619 	    CASESDLK12TONAME(SDLK12_WORLD_49, "world 49");
  1620 	    CASESDLK12TONAME(SDLK12_WORLD_50, "world 50");
  1621 	    CASESDLK12TONAME(SDLK12_WORLD_51, "world 51");
  1622 	    CASESDLK12TONAME(SDLK12_WORLD_52, "world 52");
  1623 	    CASESDLK12TONAME(SDLK12_WORLD_53, "world 53");
  1624 	    CASESDLK12TONAME(SDLK12_WORLD_54, "world 54");
  1625 	    CASESDLK12TONAME(SDLK12_WORLD_55, "world 55");
  1626 	    CASESDLK12TONAME(SDLK12_WORLD_56, "world 56");
  1627 	    CASESDLK12TONAME(SDLK12_WORLD_57, "world 57");
  1628 	    CASESDLK12TONAME(SDLK12_WORLD_58, "world 58");
  1629 	    CASESDLK12TONAME(SDLK12_WORLD_59, "world 59");
  1630 	    CASESDLK12TONAME(SDLK12_WORLD_60, "world 60");
  1631 	    CASESDLK12TONAME(SDLK12_WORLD_61, "world 61");
  1632 	    CASESDLK12TONAME(SDLK12_WORLD_62, "world 62");
  1633 	    CASESDLK12TONAME(SDLK12_WORLD_63, "world 63");
  1634 	    CASESDLK12TONAME(SDLK12_WORLD_64, "world 64");
  1635 	    CASESDLK12TONAME(SDLK12_WORLD_65, "world 65");
  1636 	    CASESDLK12TONAME(SDLK12_WORLD_66, "world 66");
  1637 	    CASESDLK12TONAME(SDLK12_WORLD_67, "world 67");
  1638 	    CASESDLK12TONAME(SDLK12_WORLD_68, "world 68");
  1639 	    CASESDLK12TONAME(SDLK12_WORLD_69, "world 69");
  1640 	    CASESDLK12TONAME(SDLK12_WORLD_70, "world 70");
  1641 	    CASESDLK12TONAME(SDLK12_WORLD_71, "world 71");
  1642 	    CASESDLK12TONAME(SDLK12_WORLD_72, "world 72");
  1643 	    CASESDLK12TONAME(SDLK12_WORLD_73, "world 73");
  1644 	    CASESDLK12TONAME(SDLK12_WORLD_74, "world 74");
  1645 	    CASESDLK12TONAME(SDLK12_WORLD_75, "world 75");
  1646 	    CASESDLK12TONAME(SDLK12_WORLD_76, "world 76");
  1647 	    CASESDLK12TONAME(SDLK12_WORLD_77, "world 77");
  1648 	    CASESDLK12TONAME(SDLK12_WORLD_78, "world 78");
  1649 	    CASESDLK12TONAME(SDLK12_WORLD_79, "world 79");
  1650 	    CASESDLK12TONAME(SDLK12_WORLD_80, "world 80");
  1651 	    CASESDLK12TONAME(SDLK12_WORLD_81, "world 81");
  1652 	    CASESDLK12TONAME(SDLK12_WORLD_82, "world 82");
  1653 	    CASESDLK12TONAME(SDLK12_WORLD_83, "world 83");
  1654 	    CASESDLK12TONAME(SDLK12_WORLD_84, "world 84");
  1655 	    CASESDLK12TONAME(SDLK12_WORLD_85, "world 85");
  1656 	    CASESDLK12TONAME(SDLK12_WORLD_86, "world 86");
  1657 	    CASESDLK12TONAME(SDLK12_WORLD_87, "world 87");
  1658 	    CASESDLK12TONAME(SDLK12_WORLD_88, "world 88");
  1659 	    CASESDLK12TONAME(SDLK12_WORLD_89, "world 89");
  1660 	    CASESDLK12TONAME(SDLK12_WORLD_90, "world 90");
  1661 	    CASESDLK12TONAME(SDLK12_WORLD_91, "world 91");
  1662 	    CASESDLK12TONAME(SDLK12_WORLD_92, "world 92");
  1663 	    CASESDLK12TONAME(SDLK12_WORLD_93, "world 93");
  1664 	    CASESDLK12TONAME(SDLK12_WORLD_94, "world 94");
  1665 	    CASESDLK12TONAME(SDLK12_WORLD_95, "world 95");
  1666 
  1667 	    CASESDLK12TONAME(SDLK12_KP0, "[0]");
  1668 	    CASESDLK12TONAME(SDLK12_KP1, "[1]");
  1669 	    CASESDLK12TONAME(SDLK12_KP2, "[2]");
  1670 	    CASESDLK12TONAME(SDLK12_KP3, "[3]");
  1671 	    CASESDLK12TONAME(SDLK12_KP4, "[4]");
  1672 	    CASESDLK12TONAME(SDLK12_KP5, "[5]");
  1673 	    CASESDLK12TONAME(SDLK12_KP6, "[6]");
  1674 	    CASESDLK12TONAME(SDLK12_KP7, "[7]");
  1675 	    CASESDLK12TONAME(SDLK12_KP8, "[8]");
  1676 	    CASESDLK12TONAME(SDLK12_KP9, "[9]");
  1677 	    CASESDLK12TONAME(SDLK12_KP_PERIOD, "[.]");
  1678 	    CASESDLK12TONAME(SDLK12_KP_DIVIDE, "[/]");
  1679 	    CASESDLK12TONAME(SDLK12_KP_MULTIPLY, "[*]");
  1680 	    CASESDLK12TONAME(SDLK12_KP_MINUS, "[-]");
  1681 	    CASESDLK12TONAME(SDLK12_KP_PLUS, "[+]");
  1682 	    CASESDLK12TONAME(SDLK12_KP_ENTER, "enter");
  1683 	    CASESDLK12TONAME(SDLK12_KP_EQUALS, "equals");
  1684 
  1685 	    CASESDLK12TONAME(SDLK12_UP, "up");
  1686 	    CASESDLK12TONAME(SDLK12_DOWN, "down");
  1687 	    CASESDLK12TONAME(SDLK12_RIGHT, "right");
  1688 	    CASESDLK12TONAME(SDLK12_LEFT, "left");
  1689 	    CASESDLK12TONAME(SDLK12_INSERT, "insert");
  1690 	    CASESDLK12TONAME(SDLK12_HOME, "home");
  1691 	    CASESDLK12TONAME(SDLK12_END, "end");
  1692 	    CASESDLK12TONAME(SDLK12_PAGEUP, "page up");
  1693 	    CASESDLK12TONAME(SDLK12_PAGEDOWN, "page down");
  1694 
  1695 	    CASESDLK12TONAME(SDLK12_F1, "f1");
  1696 	    CASESDLK12TONAME(SDLK12_F2, "f2");
  1697 	    CASESDLK12TONAME(SDLK12_F3, "f3");
  1698 	    CASESDLK12TONAME(SDLK12_F4, "f4");
  1699 	    CASESDLK12TONAME(SDLK12_F5, "f5");
  1700 	    CASESDLK12TONAME(SDLK12_F6, "f6");
  1701 	    CASESDLK12TONAME(SDLK12_F7, "f7");
  1702 	    CASESDLK12TONAME(SDLK12_F8, "f8");
  1703 	    CASESDLK12TONAME(SDLK12_F9, "f9");
  1704 	    CASESDLK12TONAME(SDLK12_F10, "f10");
  1705 	    CASESDLK12TONAME(SDLK12_F11, "f11");
  1706 	    CASESDLK12TONAME(SDLK12_F12, "f12");
  1707 	    CASESDLK12TONAME(SDLK12_F13, "f13");
  1708 	    CASESDLK12TONAME(SDLK12_F14, "f14");
  1709 	    CASESDLK12TONAME(SDLK12_F15, "f15");
  1710 
  1711 	    CASESDLK12TONAME(SDLK12_NUMLOCK, "numlock");
  1712 	    CASESDLK12TONAME(SDLK12_CAPSLOCK, "caps lock");
  1713 	    CASESDLK12TONAME(SDLK12_SCROLLOCK, "scroll lock");
  1714 	    CASESDLK12TONAME(SDLK12_RSHIFT, "right shift");
  1715 	    CASESDLK12TONAME(SDLK12_LSHIFT, "left shift");
  1716 	    CASESDLK12TONAME(SDLK12_RCTRL, "right ctrl");
  1717 	    CASESDLK12TONAME(SDLK12_LCTRL, "left ctrl");
  1718 	    CASESDLK12TONAME(SDLK12_RALT, "right alt");
  1719 	    CASESDLK12TONAME(SDLK12_LALT, "left alt");
  1720 	    CASESDLK12TONAME(SDLK12_RMETA, "right meta");
  1721 	    CASESDLK12TONAME(SDLK12_LMETA, "left meta");
  1722 	    CASESDLK12TONAME(SDLK12_LSUPER, "left super");	/* "Windows" keys */
  1723 	    CASESDLK12TONAME(SDLK12_RSUPER, "right super");	
  1724 	    CASESDLK12TONAME(SDLK12_MODE, "alt gr");
  1725 	    CASESDLK12TONAME(SDLK12_COMPOSE, "compose");
  1726 
  1727 	    CASESDLK12TONAME(SDLK12_HELP, "help");
  1728 	    CASESDLK12TONAME(SDLK12_PRINT, "print screen");
  1729 	    CASESDLK12TONAME(SDLK12_SYSREQ, "sys req");
  1730 	    CASESDLK12TONAME(SDLK12_BREAK, "break");
  1731 	    CASESDLK12TONAME(SDLK12_MENU, "menu");
  1732 	    CASESDLK12TONAME(SDLK12_POWER, "power");
  1733 	    CASESDLK12TONAME(SDLK12_EURO, "euro");
  1734 	    CASESDLK12TONAME(SDLK12_UNDO, "undo");
  1735         #undef CASESDLK12TONAME
  1736         default: break;
  1737     }
  1738 
  1739     return (char *) "unknown key";
  1740 }
  1741 
  1742 static SDL12Key
  1743 Keysym20to12(const SDL_Keycode keysym20)
  1744 {
  1745     if ( ((int) keysym20) < 127 ) {  /* (most of) low-ASCII maps directly */
  1746         if (keysym20 == SDLK_PAUSE) {
  1747             return SDLK12_PAUSE;
  1748         } else if (keysym20 == SDLK_CLEAR) {
  1749             return SDLK12_CLEAR;
  1750         }
  1751         return (SDL12Key) keysym20;
  1752     }
  1753 
  1754     switch (keysym20) {
  1755         #define CASEKEYSYM20TO12(k20, k12) case SDLK_##k20: return SDLK12_##k12
  1756         CASEKEYSYM20TO12(KP_0, KP0);
  1757         CASEKEYSYM20TO12(KP_1, KP1);
  1758         CASEKEYSYM20TO12(KP_2, KP2);
  1759         CASEKEYSYM20TO12(KP_3, KP3);
  1760         CASEKEYSYM20TO12(KP_4, KP4);
  1761         CASEKEYSYM20TO12(KP_5, KP5);
  1762         CASEKEYSYM20TO12(KP_6, KP6);
  1763         CASEKEYSYM20TO12(KP_7, KP7);
  1764         CASEKEYSYM20TO12(KP_8, KP8);
  1765         CASEKEYSYM20TO12(KP_9, KP9);
  1766         CASEKEYSYM20TO12(NUMLOCKCLEAR, NUMLOCK);
  1767         CASEKEYSYM20TO12(SCROLLLOCK, SCROLLOCK);
  1768         CASEKEYSYM20TO12(RGUI, RMETA);
  1769         CASEKEYSYM20TO12(LGUI, LMETA);
  1770         CASEKEYSYM20TO12(PRINTSCREEN, PRINT);
  1771         #undef CASEKEYSYM20TO12
  1772 
  1773         #define CASEKEYSYM20TO12(k) case SDLK_##k: return SDLK12_##k
  1774         CASEKEYSYM20TO12(CLEAR);
  1775         CASEKEYSYM20TO12(PAUSE);
  1776         CASEKEYSYM20TO12(KP_PERIOD);
  1777         CASEKEYSYM20TO12(KP_DIVIDE);
  1778         CASEKEYSYM20TO12(KP_MULTIPLY);
  1779         CASEKEYSYM20TO12(KP_MINUS);
  1780         CASEKEYSYM20TO12(KP_PLUS);
  1781         CASEKEYSYM20TO12(KP_ENTER);
  1782         CASEKEYSYM20TO12(KP_EQUALS);
  1783         CASEKEYSYM20TO12(UP);
  1784         CASEKEYSYM20TO12(DOWN);
  1785         CASEKEYSYM20TO12(RIGHT);
  1786         CASEKEYSYM20TO12(LEFT);
  1787         CASEKEYSYM20TO12(INSERT);
  1788         CASEKEYSYM20TO12(HOME);
  1789         CASEKEYSYM20TO12(END);
  1790         CASEKEYSYM20TO12(PAGEUP);
  1791         CASEKEYSYM20TO12(PAGEDOWN);
  1792         CASEKEYSYM20TO12(F1);
  1793         CASEKEYSYM20TO12(F2);
  1794         CASEKEYSYM20TO12(F3);
  1795         CASEKEYSYM20TO12(F4);
  1796         CASEKEYSYM20TO12(F5);
  1797         CASEKEYSYM20TO12(F6);
  1798         CASEKEYSYM20TO12(F7);
  1799         CASEKEYSYM20TO12(F8);
  1800         CASEKEYSYM20TO12(F9);
  1801         CASEKEYSYM20TO12(F10);
  1802         CASEKEYSYM20TO12(F11);
  1803         CASEKEYSYM20TO12(F12);
  1804         CASEKEYSYM20TO12(F13);
  1805         CASEKEYSYM20TO12(F14);
  1806         CASEKEYSYM20TO12(F15);
  1807         CASEKEYSYM20TO12(CAPSLOCK);
  1808         CASEKEYSYM20TO12(RSHIFT);
  1809         CASEKEYSYM20TO12(LSHIFT);
  1810         CASEKEYSYM20TO12(RCTRL);
  1811         CASEKEYSYM20TO12(LCTRL);
  1812         CASEKEYSYM20TO12(RALT);
  1813         CASEKEYSYM20TO12(LALT);
  1814         CASEKEYSYM20TO12(MODE);
  1815         CASEKEYSYM20TO12(HELP);
  1816         CASEKEYSYM20TO12(SYSREQ);;
  1817         CASEKEYSYM20TO12(MENU);
  1818         CASEKEYSYM20TO12(POWER);
  1819         CASEKEYSYM20TO12(UNDO);
  1820         #undef CASEKEYSYM20TO12
  1821         default: break;
  1822     }
  1823 
  1824     FIXME("nothing maps to SDLK12_COMPOSE, SDLK12_BREAK, or SDLK12_EURO ...?");
  1825     FIXME("map some of the SDLK12_WORLD keys");
  1826     return SDLK12_UNKNOWN;
  1827 }
  1828 
  1829 static int
  1830 EventFilter20to12(void *data, SDL_Event *event20)
  1831 {
  1832     //const int maxUserEvents12 = SDL12_NUMEVENTS - SDL12_USEREVENT;
  1833     SDL12_Event event12;
  1834     int x, y;
  1835 
  1836     SDL_assert(data == NULL);  /* currently unused. */
  1837 
  1838     SDL20_zero(event12);
  1839 
  1840     switch (event20->type)
  1841     {
  1842         case SDL_QUIT:
  1843             event12.type = SDL12_QUIT;
  1844             break;
  1845 
  1846         case SDL_WINDOWEVENT:
  1847             switch (event20->window.event)
  1848             {
  1849                 case SDL_WINDOWEVENT_CLOSE:
  1850                     event12.type = SDL12_QUIT;
  1851                     break;
  1852 
  1853                 case SDL_WINDOWEVENT_SHOWN:
  1854                 case SDL_WINDOWEVENT_EXPOSED:
  1855                     event12.type = SDL12_VIDEOEXPOSE;
  1856                     break;
  1857 
  1858                 case SDL_WINDOWEVENT_RESIZED:
  1859                 case SDL_WINDOWEVENT_SIZE_CHANGED:
  1860                     FIXME("what's the difference between RESIZED and SIZE_CHANGED?");
  1861                     event12.type = SDL12_VIDEORESIZE;
  1862                     event12.resize.w = event20->window.data1;
  1863                     event12.resize.h = event20->window.data2;
  1864                     break;
  1865 
  1866                 case SDL_WINDOWEVENT_MINIMIZED:
  1867                     event12.type = SDL12_ACTIVEEVENT;
  1868                     event12.active.gain = 0;
  1869                     event12.active.state = SDL12_APPACTIVE;
  1870                     break;
  1871 
  1872                 case SDL_WINDOWEVENT_RESTORED:
  1873                     event12.type = SDL12_ACTIVEEVENT;
  1874                     event12.active.gain = 1;
  1875                     event12.active.state = SDL12_APPACTIVE;
  1876                     break;
  1877 
  1878                 case SDL_WINDOWEVENT_ENTER:
  1879                     event12.type = SDL12_ACTIVEEVENT;
  1880                     event12.active.gain = 1;
  1881                     event12.active.state = SDL12_APPMOUSEFOCUS;
  1882                     break;
  1883 
  1884                 case SDL_WINDOWEVENT_LEAVE:
  1885                     event12.type = SDL12_ACTIVEEVENT;
  1886                     event12.active.gain = 0;
  1887                     event12.active.state = SDL12_APPMOUSEFOCUS;
  1888                     break;
  1889 
  1890                 case SDL_WINDOWEVENT_FOCUS_GAINED:
  1891                     event12.type = SDL12_ACTIVEEVENT;
  1892                     event12.active.gain = 1;
  1893                     event12.active.state = SDL12_APPINPUTFOCUS;
  1894                     break;
  1895 
  1896                 case SDL_WINDOWEVENT_FOCUS_LOST:
  1897                     event12.type = SDL12_ACTIVEEVENT;
  1898                     event12.active.gain = 0;
  1899                     event12.active.state = SDL12_APPINPUTFOCUS;
  1900                     break;
  1901             }
  1902             break;
  1903 
  1904         // !!! FIXME: this is sort of a mess to convert.
  1905         case SDL_SYSWMEVENT: FIXME("write me"); return 0;
  1906 
  1907         case SDL_KEYUP:
  1908         case SDL_KEYDOWN:
  1909             if (event20->key.repeat) {
  1910                 return 0;  /* ignore 2.0-style key repeat events */
  1911             }
  1912             event12.key.keysym.sym = Keysym20to12(event20->key.keysym.sym);
  1913             if (event12.key.keysym.sym == SDLK12_UNKNOWN) {
  1914                 return 0;  /* drop it if we can't map it */
  1915             }
  1916             event12.type = (event20->type == SDL_KEYDOWN) ? SDL12_KEYDOWN : SDL12_KEYUP;
  1917             event12.key.which = 0;
  1918             event12.key.state = event20->key.state;
  1919             event12.key.keysym.scancode = (event20->key.keysym.scancode < 256) ? (Uint8) event20->key.keysym.scancode : 0;
  1920             event12.key.keysym.mod = event20->key.keysym.mod;  /* these match up between 1.2 and 2.0! */
  1921             event12.key.keysym.unicode = 0;  FIXME("unicode");
  1922             break;
  1923 
  1924         case SDL_TEXTEDITING: FIXME("write me"); return 0;
  1925         case SDL_TEXTINPUT: FIXME("write me"); return 0;
  1926 
  1927         case SDL_MOUSEMOTION:
  1928         	event12.type = SDL12_MOUSEMOTION;
  1929             event12.motion.which = (Uint8) event20->motion.which;
  1930             event12.motion.state = event20->motion.state;
  1931             event12.motion.x = (Uint16) event20->motion.x;
  1932             event12.motion.y = (Uint16) event20->motion.y;
  1933             event12.motion.xrel = (Sint16) event20->motion.xrel;
  1934             event12.motion.yrel = (Sint16) event20->motion.yrel;
  1935             break;
  1936 
  1937         case SDL_MOUSEBUTTONDOWN:
  1938         	event12.type = SDL12_MOUSEBUTTONDOWN;
  1939             event12.button.which = (Uint8) event20->button.which;
  1940             event12.button.button = event20->button.button;
  1941             event12.button.state = event20->button.state;
  1942             event12.button.x = (Uint16) event20->button.x;
  1943             event12.button.y = (Uint16) event20->button.y;
  1944             break;
  1945 
  1946         case SDL_MOUSEBUTTONUP:
  1947         	event12.type = SDL12_MOUSEBUTTONUP;
  1948             event12.button.which = (Uint8) event20->button.which;
  1949             event12.button.button = event20->button.button;
  1950             event12.button.state = event20->button.state;
  1951             event12.button.x = (Uint16) event20->button.x;
  1952             event12.button.y = (Uint16) event20->button.y;
  1953             break;
  1954 
  1955         case SDL_MOUSEWHEEL:
  1956             if (event20->wheel.y == 0)
  1957                 break;  /* don't support horizontal wheels in 1.2. */
  1958 
  1959             event12.type = SDL12_MOUSEBUTTONDOWN;
  1960             event12.button.which = (Uint8) event20->wheel.which;
  1961             event12.button.button = (event20->wheel.y > 0) ? 4 : 5;  /* wheelup is 4, down is 5. */
  1962             event12.button.state = SDL_GetMouseState(&x, &y);
  1963             event12.button.x = (Uint16) x;
  1964             event12.button.y = (Uint16) y;
  1965             PushEventIfNotFiltered(&event12);
  1966 
  1967             event12.type = SDL12_MOUSEBUTTONUP;  /* immediately release mouse "button" at the end of this switch. */
  1968             break;
  1969 
  1970         case SDL_JOYAXISMOTION:
  1971             event12.type = SDL12_JOYAXISMOTION;
  1972             event12.jaxis.which = (Uint8) event20->jaxis.which;
  1973             event12.jaxis.axis = event20->jaxis.axis;
  1974             event12.jaxis.value = event20->jaxis.value;
  1975             break;
  1976 
  1977         case SDL_JOYBALLMOTION:
  1978             event12.type = SDL12_JOYBALLMOTION;
  1979             event12.jball.which = (Uint8) event20->jball.which;
  1980             event12.jball.ball = event20->jball.ball;
  1981             event12.jball.xrel = event20->jball.xrel;
  1982             event12.jball.yrel = event20->jball.yrel;
  1983             break;
  1984 
  1985         case SDL_JOYHATMOTION:
  1986             event12.type = SDL12_JOYHATMOTION;
  1987             event12.jhat.which = (Uint8) event20->jhat.which;
  1988             event12.jhat.hat = event20->jhat.hat;
  1989             event12.jhat.value = event20->jhat.value;
  1990             break;
  1991 
  1992         case SDL_JOYBUTTONDOWN:
  1993             event12.type = SDL12_JOYBUTTONDOWN;
  1994             event12.jbutton.which = (Uint8) event20->jbutton.which;
  1995             event12.jbutton.button = event20->jbutton.button;
  1996             event12.jbutton.state = event20->jbutton.state;
  1997             break;
  1998 
  1999         case SDL_JOYBUTTONUP:
  2000             event12.type = SDL12_JOYBUTTONUP;
  2001             event12.jbutton.which = (Uint8) event20->jbutton.which;
  2002             event12.jbutton.button = event20->jbutton.button;
  2003             event12.jbutton.state = event20->jbutton.state;
  2004             break;
  2005 
  2006         //case SDL_JOYDEVICEADDED:
  2007         //case SDL_JOYDEVICEREMOVED:
  2008 	    //case SDL_CONTROLLERAXISMOTION:
  2009 	    //case SDL_CONTROLLERBUTTONDOWN:
  2010 	    //case SDL_CONTROLLERBUTTONUP:
  2011 	    //case SDL_CONTROLLERDEVICEADDED:
  2012 	    //case SDL_CONTROLLERDEVICEREMOVED:
  2013 	    //case SDL_CONTROLLERDEVICEREMAPPED:
  2014         //case SDL_FINGERDOWN:
  2015         //case SDL_FINGERUP:
  2016         //case SDL_FINGERMOTION:
  2017         //case SDL_DOLLARGESTURE:
  2018         //case SDL_DOLLARRECORD:
  2019         //case SDL_MULTIGESTURE:
  2020         //case SDL_CLIPBOARDUPDATE:
  2021         //case SDL_DROPFILE:
  2022 
  2023         default:
  2024             return 0;  /* drop everything else. */
  2025     }
  2026 
  2027     PushEventIfNotFiltered(&event12);
  2028 
  2029     return 0;  /* always drop it from the 2.0 event queue. */
  2030 }
  2031 
  2032 DECLSPEC void SDLCALL
  2033 SDL_SetEventFilter(SDL12_EventFilter filter12)
  2034 {
  2035     /* We always have a filter installed, but will call the app's too. */
  2036     EventFilter12 = filter12;
  2037 }
  2038 
  2039 DECLSPEC SDL12_EventFilter SDLCALL
  2040 SDL_GetEventFilter(void)
  2041 {
  2042     return EventFilter12;
  2043 }
  2044 
  2045 
  2046 static SDL12_Rect *
  2047 Rect20to12(const SDL_Rect *rect20, SDL12_Rect *rect12)
  2048 {
  2049     rect12->x = (Sint16) rect20->x;
  2050     rect12->y = (Sint16) rect20->y;
  2051     rect12->w = (Uint16) rect20->w;
  2052     rect12->h = (Uint16) rect20->h;
  2053     return rect12;
  2054 }
  2055 
  2056 static SDL_Rect *
  2057 Rect12to20(const SDL12_Rect *rect12, SDL_Rect *rect20)
  2058 {
  2059     rect20->x = (int) rect12->x;
  2060     rect20->y = (int) rect12->y;
  2061     rect20->w = (int) rect12->w;
  2062     rect20->h = (int) rect12->h;
  2063     return rect20;
  2064 }
  2065 
  2066 static SDL12_Surface *
  2067 Surface20to12(SDL_Surface *surface20)
  2068 {
  2069     SDL12_Surface *surface12 = NULL;
  2070     SDL12_Palette *palette12 = NULL;
  2071     SDL12_PixelFormat *format12 = NULL;
  2072     Uint32 flags = 0;
  2073 
  2074     if (!surface20)
  2075         return NULL;
  2076 
  2077     surface12 = (SDL12_Surface *) SDL20_malloc(sizeof (SDL12_Surface));
  2078     if (!surface12)
  2079         goto failed;
  2080 
  2081     if (surface20->format->palette) {
  2082         palette12 = (SDL12_Palette *) SDL20_malloc(sizeof (SDL12_Palette));
  2083         if (!palette12)
  2084             goto failed;
  2085     }
  2086 
  2087     format12 = (SDL12_PixelFormat *) SDL20_malloc(sizeof (SDL12_PixelFormat));
  2088     if (!format12)
  2089         goto failed;
  2090 
  2091     if (palette12) {
  2092         SDL20_zerop(palette12);
  2093         SDL_assert(surface20->format->palette);
  2094         palette12->ncolors = surface20->format->palette->ncolors;
  2095         palette12->colors = surface20->format->palette->colors;
  2096     }
  2097 
  2098     SDL20_zerop(format12);
  2099     format12->palette = palette12;
  2100     format12->BitsPerPixel = surface20->format->BitsPerPixel;
  2101     format12->BytesPerPixel = surface20->format->BytesPerPixel;
  2102     format12->Rloss = surface20->format->Rloss;
  2103     format12->Gloss = surface20->format->Gloss;
  2104     format12->Bloss = surface20->format->Bloss;
  2105     format12->Aloss = surface20->format->Aloss;
  2106     format12->Rshift = surface20->format->Rshift;
  2107     format12->Gshift = surface20->format->Gshift;
  2108     format12->Bshift = surface20->format->Bshift;
  2109     format12->Ashift = surface20->format->Ashift;
  2110     format12->Rmask = surface20->format->Rmask;
  2111     format12->Gmask = surface20->format->Gmask;
  2112     format12->Bmask = surface20->format->Bmask;
  2113     format12->Amask = surface20->format->Amask;
  2114 
  2115     if (SDL20_HasColorKey(surface20)) {
  2116         if (SDL20_GetColorKey(surface20, &format12->colorkey) == -1) {
  2117             format12->colorkey = 0;
  2118         } else {
  2119             surface12->flags |= SDL12_SRCCOLORKEY;
  2120         }
  2121     }
  2122 
  2123     if (SDL20_GetSurfaceAlphaMod(surface20, &format12->alpha) == -1) {
  2124         format12->alpha = 255;
  2125     }
  2126 
  2127     SDL_BlendMode blendmode = SDL_BLENDMODE_NONE;
  2128     if ((SDL20_GetSurfaceBlendMode(surface20, &blendmode) == 0) && (blendmode == SDL_BLENDMODE_BLEND)) {
  2129         surface12->flags |= SDL12_SRCALPHA;
  2130     }
  2131 
  2132     SDL20_zerop(surface12);
  2133     flags = surface20->flags;
  2134     flags &= ~SDL_SIMD_ALIGNED;  /* we don't need to map this to 1.2 */
  2135     #define MAPSURFACEFLAGS(fl) { if (surface20->flags & SDL_##fl) { surface12->flags |= SDL12_##fl; flags &= ~SDL_##fl; } }
  2136     MAPSURFACEFLAGS(PREALLOC);
  2137     MAPSURFACEFLAGS(RLEACCEL);
  2138     /*MAPSURFACEFLAGS(DONTFREE);*/
  2139     #undef MAPSURFACEFLAGS
  2140     SDL_assert(flags == 0);  /* non-zero if there's a flag we didn't map. */
  2141 
  2142     surface12->format = format12;
  2143     surface12->w = surface20->w;
  2144     surface12->h = surface20->h;
  2145     surface12->pitch = (Uint16) surface20->pitch;  FIXME("make sure this fits in a Uint16");
  2146     surface12->pixels = surface20->pixels;
  2147     surface12->offset = 0;
  2148     surface12->surface20 = surface20;
  2149     Rect20to12(&surface20->clip_rect, &surface12->clip_rect);
  2150     surface12->refcount = surface20->refcount;
  2151 
  2152     return surface12;
  2153 
  2154 failed:
  2155     SDL20_free(surface12);
  2156     SDL20_free(palette12);
  2157     SDL20_free(format12);
  2158     return NULL;
  2159 }
  2160 
  2161 static void
  2162 SetPalette12ForMasks(SDL12_Surface *surface12, const Uint32 Rmask, const Uint32 Gmask, const Uint32 Bmask)
  2163 {
  2164     SDL12_PixelFormat *format12 = surface12->format;
  2165     if (format12->palette && (Rmask || Bmask || Gmask)) {
  2166         #define LOSSMASKSHIFTSETUP(t) { \
  2167             format12->t##shift = 0; \
  2168             format12->t##loss = 8; \
  2169             if (t##mask) { \
  2170                 Uint32 mask; \
  2171                 for (mask = t##mask; !(mask & 1); mask >>= 1) { \
  2172                     format12->t##shift++; \
  2173                 } \
  2174                 while (mask & 1) { \
  2175                     format12->t##loss--; \
  2176                     mask >>= 1; \
  2177                 } \
  2178             } \
  2179             format12->t##mask = t##mask; \
  2180         }
  2181         LOSSMASKSHIFTSETUP(R);
  2182         LOSSMASKSHIFTSETUP(G);
  2183         LOSSMASKSHIFTSETUP(B);
  2184         #undef LOSSMASSSHIFTSETUP
  2185         format12->Amask = 0;
  2186         format12->Ashift = 0;
  2187         format12->Aloss = 8;
  2188 
  2189         #define MASKSETUP(t) \
  2190             int t##w = 0, t##m = 0; \
  2191             if (t##mask) { \
  2192             t##w = 8 - format12->t##loss; \
  2193             for (int i = format12->t##loss; i > 0; i -= t##w) { \
  2194                 t##m |= 1 << i; \
  2195             } \
  2196         }
  2197         MASKSETUP(R);
  2198         MASKSETUP(G);
  2199         MASKSETUP(B);
  2200         #undef MASKSETUP
  2201 
  2202         const int ncolors = format12->palette->ncolors;
  2203         SDL_Color *color = format12->palette->colors;
  2204         for (int i = 0; i < ncolors; i++, color++) {
  2205             #define SETCOLOR(T, t) { \
  2206                 const int x = (i & T##mask) >> format12->T##shift; \
  2207                 color->t = (x << format12->T##loss) | ((x * T##m) >> T##w); \
  2208             }
  2209             SETCOLOR(R, r);
  2210             SETCOLOR(G, g);
  2211             SETCOLOR(B, b);
  2212             #undef SETCOLOR
  2213             color->a = 255;
  2214         }
  2215 
  2216         SDL_PixelFormat *format20 = surface12->surface20->format;
  2217         #define UPDATEFMT20(t) \
  2218             format20->t##mask = format12->t##mask; \
  2219             format20->t##loss = format12->t##loss; \
  2220             format20->t##shift = format12->t##shift;
  2221         UPDATEFMT20(R);
  2222         UPDATEFMT20(G);
  2223         UPDATEFMT20(B);
  2224         UPDATEFMT20(A);
  2225         #undef UPDATEFMT20
  2226     }
  2227 }
  2228 
  2229 DECLSPEC SDL12_Surface * SDLCALL
  2230 SDL_CreateRGBSurface(Uint32 flags12, int width, int height, int depth, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
  2231 {
  2232     // SDL 1.2 checks this.
  2233     if ((width >= 16384) || (height >= 65536)) {
  2234         SDL20_SetError("Width or height is too large");
  2235         return NULL;
  2236     }
  2237 
  2238     SDL_Surface *surface20;
  2239     if (depth == 8) {  // don't pass masks to SDL2 for 8-bit surfaces, it'll cause problems.
  2240         surface20 = SDL20_CreateRGBSurface(0, width, height, depth, 0, 0, 0, 0);
  2241     } else {
  2242         surface20 = SDL20_CreateRGBSurface(0, width, height, depth, Rmask, Gmask, Bmask, Amask);
  2243     }
  2244 
  2245     SDL12_Surface *surface12 = Surface20to12(surface20);
  2246     if (!surface12) {
  2247         SDL20_FreeSurface(surface20);
  2248         return NULL;
  2249     }
  2250 
  2251     SDL_assert((surface12->flags & ~(SDL12_SRCCOLORKEY|SDL12_SRCALPHA)) == 0);  // shouldn't have prealloc, rleaccel, or dontfree.
  2252 
  2253     SetPalette12ForMasks(surface12, Rmask, Gmask, Bmask);
  2254 
  2255     if (flags12 & SDL12_SRCALPHA) {
  2256         surface12->flags |= SDL12_SRCALPHA;
  2257         SDL20_SetSurfaceBlendMode(surface20, SDL_BLENDMODE_BLEND);
  2258     }
  2259 
  2260     return surface12;
  2261 }
  2262 
  2263 DECLSPEC SDL12_Surface * SDLCALL
  2264 SDL_CreateRGBSurfaceFrom(void *pixels, int width, int height, int depth, int pitch, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
  2265 {
  2266     if ((width >= 16384) || (height >= 65536)) {
  2267         SDL20_SetError("Width or height is too large");
  2268         return NULL;
  2269     }
  2270 
  2271     SDL_Surface *surface20;
  2272     if (depth == 8) {  // don't pass masks to SDL2 for 8-bit surfaces, it'll cause problems.
  2273         surface20 = SDL20_CreateRGBSurfaceFrom(pixels, width, height, depth, pitch, 0, 0, 0, 0);
  2274     } else {
  2275         surface20 = SDL20_CreateRGBSurfaceFrom(pixels, width, height, depth, pitch, Rmask, Gmask, Bmask, Amask);
  2276     }
  2277 
  2278     SDL12_Surface *surface12 = Surface20to12(surface20);
  2279     if (!surface12) {
  2280         SDL20_FreeSurface(surface20);
  2281         return NULL;
  2282     }
  2283 
  2284     SDL_assert((surface12->flags & ~(SDL12_SRCCOLORKEY|SDL12_SRCALPHA)) == SDL12_PREALLOC);  // should _only_ have prealloc.
  2285 
  2286     SetPalette12ForMasks(surface12, Rmask, Gmask, Bmask);
  2287 
  2288     return surface12;
  2289 }
  2290 
  2291 DECLSPEC void SDLCALL
  2292 SDL_FreeSurface(SDL12_Surface *surface12)
  2293 {
  2294     if (surface12) {
  2295         SDL20_FreeSurface(surface12->surface20);
  2296         if (surface12->format) {
  2297             SDL20_free(surface12->format->palette);
  2298             SDL20_free(surface12->format);
  2299         }
  2300         SDL20_free(surface12);
  2301     }
  2302 }
  2303 
  2304 DECLSPEC void SDLCALL
  2305 SDL_GetClipRect(SDL12_Surface *surface12, SDL12_Rect *rect)
  2306 {
  2307     if (surface12 && rect) {
  2308         SDL_memcpy(rect, &surface12->clip_rect, sizeof (SDL12_Rect));
  2309     }
  2310 }
  2311 
  2312 DECLSPEC SDL_bool SDLCALL
  2313 SDL_SetClipRect(SDL12_Surface *surface12, const SDL12_Rect *rect12)
  2314 {
  2315     SDL_bool retval = SDL_FALSE;
  2316     if (surface12)
  2317     {
  2318         SDL_Rect rect20;
  2319         retval = SDL20_SetClipRect(surface12->surface20, rect12 ? Rect12to20(rect12, &rect20) : NULL);
  2320         SDL20_GetClipRect(surface12->surface20, &rect20);
  2321         Rect20to12(&rect20, &surface12->clip_rect);
  2322     }
  2323     return retval;
  2324 }
  2325 
  2326 DECLSPEC int SDLCALL
  2327 SDL_FillRect(SDL12_Surface *dst, SDL12_Rect *dstrect12, Uint32 color)
  2328 {
  2329     SDL_Rect dstrect20;
  2330     const int retval = SDL20_FillRect(dst->surface20, dstrect12 ? Rect12to20(dstrect12, &dstrect20) : NULL, color);
  2331     if (retval != -1)
  2332     {
  2333         if (dstrect12) {  /* 1.2 stores the clip intersection in dstrect */
  2334             SDL_Rect intersected20;
  2335             SDL20_IntersectRect(&dstrect20, &dst->surface20->clip_rect, &intersected20);
  2336             Rect20to12(&intersected20, dstrect12);
  2337         }
  2338     }
  2339     return retval;
  2340 }
  2341 
  2342 
  2343 static SDL_PixelFormat *
  2344 PixelFormat12to20(SDL_PixelFormat *format20, SDL_Palette *palette20, const SDL12_PixelFormat *format12)
  2345 {
  2346     if (format12->palette) {
  2347         palette20->ncolors = format12->palette->ncolors;
  2348         palette20->colors = format12->palette->colors;
  2349         palette20->version = 1;
  2350         palette20->refcount = 1;
  2351         format20->palette = palette20;
  2352     } else {
  2353         format20->palette = NULL;
  2354     }
  2355 
  2356     format20->format = SDL20_MasksToPixelFormatEnum(format12->BitsPerPixel, format12->Rmask, format12->Gmask, format12->Bmask, format12->Amask);
  2357     format20->BitsPerPixel = format12->BitsPerPixel;
  2358     format20->BytesPerPixel = format12->BytesPerPixel;
  2359     format20->Rmask = format12->Rmask;
  2360     format20->Gmask = format12->Gmask;
  2361     format20->Bmask = format12->Bmask;
  2362     format20->Amask = format12->Amask;
  2363     format20->Rloss = format12->Rloss;
  2364     format20->Gloss = format12->Gloss;
  2365     format20->Bloss = format12->Bloss;
  2366     format20->Aloss = format12->Aloss;
  2367     format20->Rshift = format12->Rshift;
  2368     format20->Gshift = format12->Gshift;
  2369     format20->Bshift = format12->Bshift;
  2370     format20->Ashift = format12->Ashift;
  2371     format20->refcount = 1;
  2372     format20->next = NULL;
  2373     return format20;
  2374 }
  2375 
  2376 DECLSPEC Uint32 SDLCALL
  2377 SDL_MapRGB(const SDL12_PixelFormat *format12, Uint8 r, Uint8 g, Uint8 b)
  2378 {
  2379     /* This is probably way slower than apps expect. */
  2380     SDL_PixelFormat format20;
  2381     SDL_Palette palette20;
  2382     return SDL20_MapRGB(PixelFormat12to20(&format20, &palette20, format12), r, g, b);
  2383 }
  2384 
  2385 DECLSPEC Uint32 SDLCALL
  2386 SDL_MapRGBA(const SDL12_PixelFormat *format12, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
  2387 {
  2388     /* This is probably way slower than apps expect. */
  2389     SDL_PixelFormat format20;
  2390     SDL_Palette palette20;
  2391     return SDL20_MapRGBA(PixelFormat12to20(&format20, &palette20, format12), r, g, b, a);
  2392 }
  2393 
  2394 DECLSPEC void SDLCALL
  2395 SDL_GetRGB(Uint32 pixel, const SDL12_PixelFormat *format12, Uint8 *r, Uint8 *g, Uint8 *b)
  2396 {
  2397     /* This is probably way slower than apps expect. */
  2398     SDL_PixelFormat format20;
  2399     SDL_Palette palette20;
  2400     return SDL20_GetRGB(pixel, PixelFormat12to20(&format20, &palette20, format12), r, g, b);
  2401 }
  2402 
  2403 DECLSPEC void SDLCALL
  2404 SDL_GetRGBA(Uint32 pixel, const SDL12_PixelFormat *format12, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a)
  2405 {
  2406     /* This is probably way slower than apps expect. */
  2407     SDL_PixelFormat format20;
  2408     SDL_Palette palette20;
  2409     return SDL20_GetRGBA(pixel, PixelFormat12to20(&format20, &palette20, format12), r, g, b, a);
  2410 }
  2411 
  2412 DECLSPEC const SDL12_VideoInfo * SDLCALL
  2413 SDL_GetVideoInfo(void)
  2414 {
  2415     SDL_DisplayMode mode;
  2416 
  2417     FIXME("calculate this in Init12Video(), then this just does: return VideoInfo.vfmt ? &VideoInfo : NULL;");
  2418 
  2419     if (!VideoInfo12.vfmt && SDL20_GetDesktopDisplayMode(VideoDisplayIndex, &mode) == 0) {
  2420         VideoInfo12.vfmt = SDL20_AllocFormat(mode.format);
  2421         VideoInfo12.current_w = mode.w;
  2422         VideoInfo12.current_h = mode.h;
  2423         FIXME("vidinfo details commented out");
  2424         //VideoInfo12.wm_available = 1;
  2425         //VideoInfo12.video_mem = 1024 * 256;
  2426     }
  2427     return &VideoInfo12;
  2428 }
  2429 
  2430 DECLSPEC int SDLCALL
  2431 SDL_VideoModeOK(int width, int height, int bpp, Uint32 sdl12flags)
  2432 {
  2433     int i, nummodes, actual_bpp = 0;
  2434 
  2435     if (!SDL20_WasInit(SDL_INIT_VIDEO)) {
  2436         return 0;
  2437     }
  2438 
  2439     if (!(sdl12flags & SDL12_FULLSCREEN)) {
  2440         SDL_DisplayMode mode;
  2441         SDL20_GetDesktopDisplayMode(VideoDisplayIndex, &mode);
  2442         return SDL_BITSPERPIXEL(mode.format);
  2443     }
  2444 
  2445     nummodes = SDL20_GetNumDisplayModes(VideoDisplayIndex);
  2446     for (i = 0; i < nummodes; ++i) {
  2447         SDL_DisplayMode mode;
  2448         SDL20_GetDisplayMode(VideoDisplayIndex, i, &mode);
  2449         if (!mode.w || !mode.h || (width == mode.w && height == mode.h)) {
  2450             if (!mode.format) {
  2451                 return bpp;
  2452             }
  2453             if (SDL_BITSPERPIXEL(mode.format) >= (Uint32) bpp) {
  2454                 actual_bpp = SDL_BITSPERPIXEL(mode.format);
  2455             }
  2456         }
  2457     }
  2458     return actual_bpp;
  2459 }
  2460 
  2461 DECLSPEC SDL12_Rect ** SDLCALL
  2462 SDL_ListModes(const SDL12_PixelFormat *format12, Uint32 flags)
  2463 {
  2464     Uint32 fmt;
  2465     int i;
  2466 
  2467     if (!SDL20_WasInit(SDL_INIT_VIDEO)) {
  2468         return NULL;
  2469     }
  2470 
  2471     if ((!format12) && (!VideoInfo12.vfmt)) {
  2472         SDL20_SetError("No pixel format specified");
  2473         return NULL;
  2474     }
  2475 
  2476     if (!(flags & SDL12_FULLSCREEN)) {
  2477         return (SDL12_Rect **) (-1);  /* any resolution is fine. */
  2478     }
  2479 
  2480     if (format12) {
  2481         fmt = SDL20_MasksToPixelFormatEnum(format12->BitsPerPixel, format12->Rmask, format12->Gmask, format12->Bmask, format12->Amask);
  2482     } else {
  2483         fmt = VideoInfo12.vfmt->format;
  2484     }
  2485 
  2486     for (i = 0; i < VideoModesCount; i++) {
  2487         VideoModeList *modes = &VideoModes[i];
  2488         if (modes->format == fmt) {
  2489             return modes->modes12;
  2490         }
  2491     }
  2492 
  2493     SDL20_SetError("No modes support requested pixel format");
  2494     return NULL;
  2495 }
  2496 
  2497 DECLSPEC void SDLCALL
  2498 SDL_FreeCursor(SDL12_Cursor *cursor12)
  2499 {
  2500     if (cursor12) {
  2501         if (cursor12->wm_cursor)
  2502             SDL20_FreeCursor(cursor12->wm_cursor);
  2503         SDL20_free(cursor12->data);
  2504         SDL20_free(cursor12->mask);
  2505         SDL20_free(cursor12);
  2506     }
  2507 }
  2508 
  2509 DECLSPEC SDL12_Cursor * SDLCALL
  2510 SDL_CreateCursor(Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
  2511 {
  2512     const size_t datasize = h * (w / 8);
  2513     SDL_Cursor *cursor20 = NULL;
  2514     SDL12_Cursor *retval = NULL;
  2515 
  2516     retval = (SDL12_Cursor *) SDL20_malloc(sizeof (SDL12_Cursor));
  2517     if (!retval)
  2518         goto outofmem;
  2519 
  2520     SDL20_zerop(retval);
  2521 
  2522     retval->data = (Uint8 *) SDL20_malloc(datasize);
  2523     if (!retval->data)
  2524         goto outofmem;
  2525 
  2526     retval->mask = (Uint8 *) SDL20_malloc(datasize);
  2527     if (!retval->mask)
  2528         goto outofmem;
  2529 
  2530     cursor20 = SDL20_CreateCursor(data, mask, w, h, hot_x, hot_y);
  2531     if (!cursor20)
  2532         goto failed;
  2533 
  2534     retval->area.w = w;
  2535     retval->area.h = h;
  2536     retval->hot_x = hot_x;
  2537     retval->hot_y = hot_y;
  2538     retval->wm_cursor = cursor20;
  2539     /* we always leave retval->save as null pointers. */
  2540 
  2541     SDL20_memcpy(retval->data, data, datasize);
  2542     SDL20_memcpy(retval->mask, mask, datasize);
  2543 
  2544     return retval;
  2545 
  2546 outofmem:
  2547     SDL20_OutOfMemory();
  2548 
  2549 failed:
  2550     SDL_FreeCursor(retval);
  2551     return NULL;
  2552 }
  2553 
  2554 DECLSPEC void SDLCALL
  2555 SDL_SetCursor(SDL12_Cursor *cursor)
  2556 {
  2557     CurrentCursor12 = cursor;
  2558     SDL20_SetCursor(cursor ? cursor->wm_cursor : NULL);
  2559 }
  2560 
  2561 DECLSPEC SDL12_Cursor * SDLCALL
  2562 SDL_GetCursor(void)
  2563 {
  2564     return CurrentCursor12;
  2565 }
  2566 
  2567 static void
  2568 GetEnvironmentWindowPosition(int *x, int *y)
  2569 {
  2570     int display = VideoDisplayIndex;
  2571     const char *window = SDL20_getenv("SDL_VIDEO_WINDOW_POS");
  2572     const char *center = SDL20_getenv("SDL_VIDEO_CENTERED");
  2573     if (window) {
  2574         if (SDL20_strcmp(window, "center") == 0) {
  2575             center = window;
  2576         } else if (SDL20_sscanf(window, "%d,%d", x, y) == 2) {
  2577             return;
  2578         }
  2579     }
  2580 
  2581     if (center) {
  2582         *x = SDL_WINDOWPOS_CENTERED_DISPLAY(display);
  2583         *y = SDL_WINDOWPOS_CENTERED_DISPLAY(display);
  2584     }
  2585 }
  2586 
  2587 static void
  2588 SetupScreenSaver(const int flags12)
  2589 {
  2590     const char *env;
  2591     SDL_bool allow_screensaver;
  2592 
  2593     /* Allow environment override of screensaver disable */
  2594     env = SDL20_getenv("SDL_VIDEO_ALLOW_SCREENSAVER");
  2595     if (env) {
  2596         allow_screensaver = SDL20_atoi(env) ? SDL_TRUE : SDL_FALSE;
  2597     } else if (flags12 & SDL12_FULLSCREEN) {
  2598         allow_screensaver = SDL_FALSE;
  2599     } else {
  2600         allow_screensaver = SDL_TRUE;
  2601     }
  2602     if (allow_screensaver) {
  2603         SDL20_EnableScreenSaver();
  2604     } else {
  2605         SDL20_DisableScreenSaver();
  2606     }
  2607 }
  2608 
  2609 
  2610 static SDL12_Surface *
  2611 EndVidModeCreate(void)
  2612 {
  2613     if (VideoTexture20) {
  2614         SDL20_DestroyTexture(VideoTexture20);
  2615         VideoTexture20 = NULL;
  2616     }
  2617     if (VideoRenderer20) {
  2618         SDL20_DestroyRenderer(VideoRenderer20);
  2619         VideoRenderer20 = NULL;
  2620     }
  2621     if (VideoGLContext20) {
  2622         SDL20_GL_MakeCurrent(NULL, NULL);
  2623         SDL20_GL_DeleteContext(VideoGLContext20);
  2624         VideoGLContext20 = NULL;
  2625     }
  2626     if (VideoWindow20) {
  2627         SDL20_DestroyWindow(VideoWindow20);
  2628         VideoWindow20 = NULL;
  2629     }
  2630     if (VideoSurface12) {
  2631         SDL20_free(VideoSurface12->pixels);
  2632         VideoSurface12->pixels = NULL;
  2633         SDL_FreeSurface(VideoSurface12);
  2634         VideoSurface12 = NULL;
  2635     }
  2636     if (VideoConvertSurface20) {
  2637         SDL20_FreeSurface(VideoConvertSurface20);
  2638         VideoConvertSurface20 = NULL;
  2639     }
  2640     return NULL;
  2641 }
  2642 
  2643 
  2644 static SDL12_Surface *
  2645 CreateSurface12WithFormat(const int w, const int h, const Uint32 fmt)
  2646 {
  2647     Uint32 rmask, gmask, bmask, amask;
  2648     int bpp;
  2649     if (!SDL20_PixelFormatEnumToMasks(fmt, &bpp, &rmask, &gmask, &bmask, &amask)) {
  2650         return NULL;
  2651     }
  2652     return SDL_CreateRGBSurface(0, w, h, bpp, rmask, gmask, bmask, amask);
  2653 }
  2654 
  2655 static SDL_Surface *
  2656 CreateNullPixelSurface20(const int width, const int height, const Uint32 fmt)
  2657 {
  2658     SDL_Surface *surface20 = SDL20_CreateRGBSurfaceWithFormat(0, 0, 0, SDL_BITSPERPIXEL(fmt), fmt);
  2659     if (surface20) {
  2660         surface20->flags |= SDL_PREALLOC;
  2661         surface20->pixels = NULL;
  2662         surface20->w = width;
  2663         surface20->h = height;
  2664         surface20->pitch = 0;
  2665         SDL20_SetClipRect(surface20, NULL);
  2666     }
  2667     return surface20;
  2668 }
  2669 
  2670 
  2671 DECLSPEC SDL12_Surface * SDLCALL
  2672 SDL_SetVideoMode(int width, int height, int bpp, Uint32 flags12)
  2673 {
  2674     FIXME("currently ignores SDL_WINDOWID, which we could use with SDL_CreateWindowFrom ...?");
  2675     SDL_DisplayMode dmode;
  2676     Uint32 fullscreen_flags20 = 0;
  2677     Uint32 appfmt;
  2678 
  2679     /* SDL_SetVideoMode() implicitly inits if necessary. */
  2680     if (SDL20_WasInit(SDL_INIT_VIDEO) == 0) {
  2681         if (SDL20_Init(SDL_INIT_VIDEO) < 0) {
  2682             return NULL;
  2683         }
  2684     }
  2685 
  2686     if ((flags12 & SDL12_OPENGLBLIT) == SDL12_OPENGLBLIT) {
  2687         FIXME("No OPENGLBLIT support at the moment");
  2688         SDL20_SetError("SDL_OPENGLBLIT is (currently) unsupported");
  2689         return NULL;
  2690     }
  2691 
  2692     FIXME("handle SDL_ANYFORMAT");
  2693 
  2694     if ((width < 0) || (height < 0)) {
  2695         SDL20_SetError("Invalid width or height");
  2696         return NULL;
  2697     }
  2698 
  2699     FIXME("There's an environment variable to choose a display");
  2700     if (SDL20_GetCurrentDisplayMode(0, &dmode) < 0) {
  2701         return NULL;
  2702     }
  2703 
  2704     if (width == 0) {
  2705         width = dmode.w;
  2706     }
  2707 
  2708     if (height == 0) {
  2709         height = dmode.h;
  2710     }
  2711 
  2712     if (bpp == 0) {
  2713         bpp = SDL_BITSPERPIXEL(dmode.format);
  2714     }
  2715 
  2716     switch (bpp) {
  2717         case  8: appfmt = SDL_PIXELFORMAT_INDEX8; break;
  2718         case 16: appfmt = SDL_PIXELFORMAT_RGB565; FIXME("bgr instead of rgb?"); break;
  2719         case 24: appfmt = SDL_PIXELFORMAT_RGB24; FIXME("bgr instead of rgb?"); break;
  2720         case 32: appfmt = SDL_PIXELFORMAT_ARGB8888; FIXME("bgr instead of rgb?"); break;
  2721         default: SDL20_SetError("Unsupported bits-per-pixel"); return NULL;
  2722     }
  2723 
  2724     SDL_assert((VideoSurface12 != NULL) == (VideoWindow20 != NULL));
  2725 
  2726     FIXME("don't do anything if the window's dimensions, etc haven't changed.");
  2727     FIXME("we need to preserve VideoSurface12 (but not its pixels), I think...");
  2728 
  2729     if ( VideoSurface12 && ((VideoSurface12->flags & SDL12_OPENGL) != (flags12 & SDL12_OPENGL)) ) {
  2730         EndVidModeCreate();  /* rebuild the window if moving to/from a GL context */
  2731     } else if ( VideoSurface12 && (VideoSurface12->surface20->format->format != appfmt)) {
  2732         EndVidModeCreate();  /* rebuild the window if changing pixel format */
  2733     } else if (VideoGLContext20) {
  2734         /* SDL 1.2 (infuriatingly!) destroys the GL context on each resize, so we will too */
  2735         SDL20_GL_MakeCurrent(NULL, NULL);
  2736         SDL20_GL_DeleteContext(VideoGLContext20);
  2737         VideoGLContext20 = NULL;
  2738     }
  2739 
  2740     if (flags12 & SDL12_FULLSCREEN) {
  2741         // OpenGL tries to force the real resolution requested, but for
  2742         //  software rendering, we're just going to push it off onto the
  2743         //  GPU, so use FULLSCREEN_DESKTOP and logical scaling there.
  2744         FIXME("OpenGL will still expect letterboxing and centering if it didn't get an exact resolution match.");
  2745         if (flags12 & SDL12_OPENGL) {
  2746             fullscreen_flags20 |= SDL_WINDOW_FULLSCREEN;
  2747         } else {
  2748             fullscreen_flags20 |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  2749         }
  2750     }
  2751 
  2752     if (!VideoWindow20) {  /* create it */
  2753         int x = SDL_WINDOWPOS_UNDEFINED, y = SDL_WINDOWPOS_UNDEFINED;
  2754         Uint32 flags20 = fullscreen_flags20;
  2755         if (flags12 & SDL12_OPENGL) { flags20 |= SDL_WINDOW_OPENGL; }
  2756         if (flags12 & SDL12_RESIZABLE) { flags20 |= SDL_WINDOW_RESIZABLE; }
  2757         if (flags12 & SDL12_NOFRAME) { flags20 |= SDL_WINDOW_BORDERLESS; }
  2758 
  2759         /* most platforms didn't check these environment variables, but the major
  2760            ones did (x11, windib, quartz), so we'll just offer it everywhere. */
  2761         GetEnvironmentWindowPosition(&x, &y);
  2762 
  2763         VideoWindow20 = SDL20_CreateWindow(WindowTitle, x, y, width, height, flags20);
  2764         if (!VideoWindow20) {
  2765             return EndVidModeCreate();
  2766         }
  2767         if (VideoIcon20) {
  2768             SDL20_SetWindowIcon(VideoWindow20, VideoIcon20);
  2769         }
  2770     } else {  /* resize it */
  2771         SDL20_SetWindowSize(VideoWindow20, width, height);
  2772         SDL20_SetWindowFullscreen(VideoWindow20, fullscreen_flags20);
  2773         SDL20_SetWindowBordered(VideoWindow20, (flags12 & SDL12_NOFRAME) ? SDL_FALSE : SDL_TRUE);
  2774         SDL20_SetWindowResizable(VideoWindow20, (flags12 & SDL12_RESIZABLE) ? SDL_TRUE : SDL_FALSE);
  2775     }
  2776 
  2777     if (VideoSurface12) {
  2778         SDL20_free(VideoSurface12->pixels);
  2779     } else {
  2780         VideoSurface12 = CreateSurface12WithFormat(0, 0, appfmt);
  2781         if (!VideoSurface12) {
  2782             return EndVidModeCreate();
  2783         }
  2784     }
  2785 
  2786     VideoSurface12->surface20->flags |= SDL_PREALLOC;
  2787     VideoSurface12->flags |= SDL12_PREALLOC;
  2788     VideoSurface12->pixels = VideoSurface12->surface20->pixels = NULL;
  2789     VideoSurface12->w = VideoSurface12->surface20->w = width;
  2790     VideoSurface12->h = VideoSurface12->surface20->h = height;
  2791     VideoSurface12->pitch = VideoSurface12->surface20->pitch = width * SDL_BYTESPERPIXEL(appfmt);
  2792     SDL_SetClipRect(VideoSurface12, NULL);
  2793 
  2794     if (flags12 & SDL12_FULLSCREEN) {
  2795         VideoSurface12->flags |= SDL12_FULLSCREEN;
  2796     } else {
  2797         VideoSurface12->flags &= ~SDL12_FULLSCREEN;
  2798     }
  2799 
  2800     if (flags12 & SDL12_OPENGL) {
  2801         SDL_assert(!VideoTexture20);  /* either a new window or we destroyed all this */
  2802         SDL_assert(!VideoRenderer20);
  2803         VideoGLContext20 = SDL20_GL_CreateContext(VideoWindow20);
  2804         if (!VideoGLContext20) {
  2805             return EndVidModeCreate();
  2806         }
  2807 
  2808         VideoSurface12->flags |= SDL12_OPENGL;
  2809     } else {
  2810         /* always use a renderer for non-OpenGL windows. */
  2811         SDL_RendererInfo rinfo;
  2812         SDL_assert(!VideoGLContext20);  /* either a new window or we destroyed all this */
  2813         if (!VideoRenderer20) {
  2814             VideoRenderer20 = SDL20_CreateRenderer(VideoWindow20, -1, SDL_RENDERER_ACCELERATED|SDL_RENDERER_PRESENTVSYNC);
  2815         }
  2816         if (!VideoRenderer20) {
  2817             VideoRenderer20 = SDL20_CreateRenderer(VideoWindow20, -1, SDL_RENDERER_ACCELERATED);
  2818         }
  2819         if (!VideoRenderer20) {
  2820             VideoRenderer20 = SDL20_CreateRenderer(VideoWindow20, -1, 0);
  2821         }
  2822         if (!VideoRenderer20) {
  2823             return EndVidModeCreate();
  2824         }
  2825 
  2826         SDL20_RenderSetLogicalSize(VideoRenderer20, width, height);
  2827         SDL20_SetRenderDrawColor(VideoRenderer20, 0, 0, 0, 255);
  2828         SDL20_RenderClear(VideoRenderer20);
  2829         SDL20_RenderPresent(VideoRenderer20);
  2830         SDL20_SetRenderDrawColor(VideoRenderer20, 255, 255, 255, 255);
  2831 
  2832         if (SDL20_GetRendererInfo(VideoRenderer20, &rinfo) < 0) {
  2833             return EndVidModeCreate();
  2834         }
  2835 
  2836         if (VideoTexture20) {
  2837             SDL20_DestroyTexture(VideoTexture20);
  2838         }
  2839 
  2840         if (VideoConvertSurface20) {
  2841             SDL20_FreeSurface(VideoConvertSurface20);
  2842             VideoConvertSurface20 = NULL;
  2843         }
  2844 
  2845         VideoTexture20 = SDL20_CreateTexture(VideoRenderer20, rinfo.texture_formats[0], SDL_TEXTUREACCESS_STREAMING, width, height);
  2846         if (!VideoTexture20) {
  2847             return EndVidModeCreate();
  2848         }
  2849 
  2850         if (rinfo.texture_formats[0] != appfmt) {
  2851             /* need to convert between app's format and texture format */
  2852             VideoConvertSurface20 = CreateNullPixelSurface20(width, height, rinfo.texture_formats[0]);
  2853             if (!VideoConvertSurface20) {
  2854                 return EndVidModeCreate();
  2855             }
  2856         }
  2857 
  2858         VideoSurface12->flags &= ~SDL12_OPENGL;
  2859         VideoSurface12->flags |= SDL12_DOUBLEBUF;
  2860         VideoSurface12->surface20->pixels = SDL20_malloc(height * VideoSurface12->pitch);
  2861         VideoSurface12->pixels = VideoSurface12->surface20->pixels;
  2862         if (!VideoSurface12->pixels) {
  2863             SDL20_OutOfMemory();
  2864             return EndVidModeCreate();
  2865         }
  2866 
  2867         /* fill in the same default palette that SDL 1.2 does... */
  2868         if (VideoSurface12->format->BitsPerPixel == 8) {
  2869             int i;
  2870             SDL_Color *color = VideoSurface12->format->palette->colors;
  2871             for (i = 0; i < 256; i++, color++) {
  2872                 { const int x = i & 0xe0; color->r = x | x >> 3 | x >> 6; }
  2873                 { const int x = (i << 3) & 0xe0; color->g = x | x >> 3 | x >> 6; }
  2874                 { const int x = (i & 0x3) | ((i & 0x3) << 2); color->b = x | x << 4; }
  2875                 color->a = 255;
  2876             }
  2877         }
  2878     }
  2879 
  2880     SDL20_RaiseWindow(VideoWindow20);
  2881 
  2882     FIXME("setup screen saver");
  2883 
  2884     VideoSurfacePresentTicks = 0;
  2885     VideoSurfaceLastPresentTicks = 0;
  2886 
  2887     return VideoSurface12;
  2888 }
  2889 
  2890 DECLSPEC SDL12_Surface * SDLCALL
  2891 SDL_GetVideoSurface(void)
  2892 {
  2893     return VideoSurface12;
  2894 }
  2895 
  2896 static int
  2897 SaveDestAlpha(SDL12_Surface *src12, SDL12_Surface *dst12, Uint8 **retval)
  2898 {
  2899     FIXME("This should only save the dst rect in use");
  2900 
  2901     /* The 1.2 docs say this:
  2902      * RGBA->RGBA:
  2903      *     SDL_SRCALPHA set:
  2904      * 	alpha-blend (using the source alpha channel) the RGB values;
  2905      * 	leave destination alpha untouched. [Note: is this correct?]
  2906      *
  2907      * In SDL2, we change the destination alpha. We have to save it off in this case, which sucks.
  2908      */
  2909     Uint8 *dstalpha = NULL;
  2910     const SDL_bool save_dstalpha = ((src12->flags & SDL12_SRCALPHA) && dst12->format->Amask && ((src12->format->alpha != 255) || src12->format->Amask)) ? SDL_TRUE : SDL_FALSE;
  2911     if (save_dstalpha) {
  2912         const int w = dst12->w;
  2913         const int h = dst12->h;
  2914         dstalpha = (Uint8 *) SDL_malloc(w * h);
  2915         if (!dstalpha) {
  2916             *retval = NULL;
  2917             return SDL20_OutOfMemory();
  2918         }
  2919 
  2920         Uint8 *dptr = dstalpha;
  2921         const Uint32 amask = dst12->format->Amask;
  2922         const Uint32 ashift = dst12->format->Ashift;
  2923         const Uint16 pitch = dst12->pitch;
  2924         if ((amask == 0xFF) || (amask == 0xFF00) || (amask == 0xFF0000) ||(amask == 0xFF000000)) {
  2925             FIXME("this could be SIMD'd");
  2926         }
  2927         if (dst12->format->BytesPerPixel == 2) {
  2928             const Uint16 *sptr = (const Uint16 *) dst12->pixels;
  2929             for (int y = 0; y < h; y++) {
  2930                 for (int x = 0; x < w; x++) {
  2931                     *(dptr++) = (Uint8) ((sptr[x] & amask) >> ashift);
  2932                 }
  2933                 sptr = (Uint16 *) (((Uint8 *) sptr) + pitch);
  2934             }
  2935         } else if (dst12->format->BytesPerPixel == 4) {
  2936             const Uint32 *sptr = (const Uint32 *) dst12->pixels;
  2937             for (int y = 0; y < h; y++) {
  2938                 for (int x = 0; x < w; x++) {
  2939                     *(dptr++) = (Uint8) ((sptr[x] & amask) >> ashift);
  2940                 }
  2941                 sptr = (Uint32 *) (((Uint8 *) sptr) + pitch);
  2942             }
  2943         } else {
  2944             FIXME("Unhandled dest alpha");
  2945         }
  2946     }
  2947 
  2948     *retval = dstalpha;
  2949     return 0;
  2950 }
  2951 
  2952 static void
  2953 RestoreDestAlpha(SDL12_Surface *dst12, Uint8 *dstalpha)
  2954 {
  2955     if (dstalpha) {
  2956         const int w = dst12->w;
  2957         const int h = dst12->h;
  2958         const Uint8 *sptr = dstalpha;
  2959         const Uint32 amask = dst12->format->Amask;
  2960         const Uint32 ashift = dst12->format->Ashift;
  2961         const Uint16 pitch = dst12->pitch;
  2962         if ((amask == 0xFF) || (amask == 0xFF00) || (amask == 0xFF0000) ||(amask == 0xFF000000)) {
  2963             FIXME("this could be SIMD'd");
  2964         }
  2965         if (dst12->format->BytesPerPixel == 2) {
  2966             Uint16 *dptr = (Uint16 *) dst12->pixels;
  2967             for (int y = 0; y < h; y++) {
  2968                 for (int x = 0; x < w; x++) {
  2969                     dptr[x] = (Uint16) ((dptr[x] & ~amask) | ((((Uint16) *(sptr++)) << ashift) & amask));
  2970                 }
  2971                 dptr = (Uint16 *) (((Uint8 *) dptr) + pitch);
  2972             }
  2973         } else if (dst12->format->BytesPerPixel == 4) {
  2974             Uint32 *dptr = (Uint32 *) dst12->pixels;
  2975             for (int y = 0; y < h; y++) {
  2976                 for (int x = 0; x < w; x++) {
  2977                     dptr[x] = (dptr[x] & ~amask) | ((((Uint32) *(sptr++)) << ashift) & amask);
  2978                 }
  2979                 dptr = (Uint32 *) (((Uint8 *) dptr) + pitch);
  2980             }
  2981         } else {
  2982             FIXME("Unhandled dest alpha");
  2983         }
  2984         SDL_free(dstalpha);
  2985     }
  2986 }
  2987 
  2988 DECLSPEC int SDLCALL
  2989 SDL_UpperBlit(SDL12_Surface *src12, SDL12_Rect *srcrect12, SDL12_Surface *dst12, SDL12_Rect *dstrect12)
  2990 {
  2991     Uint8 *dstalpha;
  2992     if (SaveDestAlpha(src12, dst12, &dstalpha) < 0) {
  2993         return -1;
  2994     }
  2995 
  2996     SDL_Rect srcrect20, dstrect20;
  2997     const int retval = SDL20_UpperBlit(src12->surface20,
  2998                                        srcrect12 ? Rect12to20(srcrect12, &srcrect20) : NULL,
  2999                                        dst12->surface20,
  3000                                        dstrect12 ? Rect12to20(dstrect12, &dstrect20) : NULL);
  3001 
  3002     RestoreDestAlpha(dst12, dstalpha);
  3003 
  3004     if (srcrect12) {
  3005         Rect20to12(&srcrect20, srcrect12);
  3006     }
  3007 
  3008     if (dstrect12) {
  3009         Rect20to12(&dstrect20, dstrect12);
  3010     }
  3011 
  3012     return retval;
  3013 }
  3014 
  3015 DECLSPEC int SDLCALL
  3016 SDL_LowerBlit(SDL12_Surface *src12, SDL12_Rect *srcrect12, SDL12_Surface *dst12, SDL12_Rect *dstrect12)
  3017 {
  3018     Uint8 *dstalpha;
  3019     if (SaveDestAlpha(src12, dst12, &dstalpha) < 0) {
  3020         return -1;
  3021     }
  3022 
  3023     SDL_Rect srcrect20, dstrect20;
  3024     const int retval = SDL20_LowerBlit(src12->surface20,
  3025                                        srcrect12 ? Rect12to20(srcrect12, &srcrect20) : NULL,
  3026                                        dst12->surface20,
  3027                                        dstrect12 ? Rect12to20(dstrect12, &dstrect20) : NULL);
  3028 
  3029     RestoreDestAlpha(dst12, dstalpha);
  3030 
  3031     if (srcrect12) {
  3032         Rect20to12(&srcrect20, srcrect12);
  3033     }
  3034 
  3035     if (srcrect12) {
  3036         Rect20to12(&dstrect20, dstrect12);
  3037     }
  3038 
  3039     return retval;
  3040 }
  3041 
  3042 DECLSPEC int SDLCALL
  3043 SDL_SetAlpha(SDL12_Surface *surface12, Uint32 flags12, Uint8 value)
  3044 {
  3045     const SDL_bool addkey = (flags12 & SDL12_SRCALPHA) ? SDL_TRUE : SDL_FALSE;
  3046     const int retval = SDL20_SetSurfaceAlphaMod(surface12->surface20, addkey ? value : 255);
  3047     if (SDL20_GetSurfaceAlphaMod(surface12->surface20, &surface12->format->alpha) < 0) {
  3048         surface12->format->alpha = 255;
  3049     }
  3050     FIXME("Should this set SDL12_SRCALPHA on the surface?");
  3051     return retval;
  3052 }
  3053 
  3054 DECLSPEC int SDLCALL
  3055 SDL_LockSurface(SDL12_Surface *surface12)
  3056 {
  3057     const int retval = SDL20_LockSurface(surface12->surface20);
  3058     surface12->pixels = surface12->surface20->pixels;
  3059     surface12->pitch = surface12->surface20->pitch;
  3060     return retval;
  3061 }
  3062 
  3063 DECLSPEC void SDLCALL
  3064 SDL_UnlockSurface(SDL12_Surface *surface12)
  3065 {
  3066     SDL20_UnlockSurface(surface12->surface20);
  3067     surface12->pixels = surface12->surface20->pixels;
  3068     surface12->pitch = surface12->surface20->pitch;
  3069 }
  3070 
  3071 DECLSPEC SDL12_Surface * SDLCALL
  3072 SDL_ConvertSurface(SDL12_Surface *src12, const SDL12_PixelFormat *format12, Uint32 flags12)
  3073 {
  3074     Uint32 flags20 = 0;
  3075     SDL_PixelFormat format20;
  3076     SDL_Palette palette20;
  3077     SDL_Surface *surface20;
  3078     SDL12_Surface *retval = NULL;
  3079 
  3080     if (flags12 & SDL12_PREALLOC) flags20 |= SDL_PREALLOC;
  3081     if (flags12 & SDL12_RLEACCEL) flags20 |= SDL_RLEACCEL;
  3082 
  3083     surface20 = SDL20_ConvertSurface(src12->surface20, PixelFormat12to20(&format20, &palette20, format12), flags20);
  3084     if (surface20) {
  3085         retval = Surface20to12(surface20);
  3086         if (!retval) {
  3087             SDL20_FreeSurface(surface20);
  3088         } else {
  3089             if (flags12 & SDL12_SRCALPHA) {
  3090                 SDL20_SetSurfaceBlendMode(surface20, SDL_BLENDMODE_BLEND);
  3091                 retval->flags |= SDL12_SRCALPHA;
  3092             }
  3093         }
  3094     }
  3095     return retval;
  3096 }
  3097 
  3098 DECLSPEC SDL12_Surface * SDLCALL
  3099 SDL_DisplayFormat(SDL12_Surface *surface12)
  3100 {
  3101     const Uint32 flags = surface12->flags & (SDL12_SRCCOLORKEY|SDL12_SRCALPHA|SDL12_RLEACCELOK);
  3102     return SDL_ConvertSurface(surface12, VideoSurface12->format, flags);
  3103 }
  3104 
  3105 DECLSPEC SDL12_Surface * SDLCALL
  3106 SDL_DisplayFormatAlpha(SDL12_Surface *surface12)
  3107 {
  3108     return SDL_DisplayFormat(surface12);
  3109 }
  3110 
  3111 static void
  3112 PresentScreen(void)
  3113 {
  3114     void *pixels = NULL;
  3115     int pitch = 0;
  3116 
  3117     SDL_assert(VideoSurface12 != NULL);
  3118 
  3119     if (SDL20_LockTexture(VideoTexture20, NULL, &pixels, &pitch) < 0) {
  3120         return;  /* oh well */
  3121     }
  3122 
  3123     FIXME("Maybe lock texture always, until present, if no conversion needed?");
  3124     if (VideoConvertSurface20) {
  3125         VideoConvertSurface20->pixels = pixels;
  3126         VideoConvertSurface20->pitch = pitch;
  3127         SDL20_UpperBlit(VideoSurface12->surface20, NULL, VideoConvertSurface20, NULL);
  3128         VideoConvertSurface20->pixels = NULL;
  3129         VideoConvertSurface20->pitch = 0;
  3130     } else if (pitch == VideoSurface12->pitch) {
  3131         SDL_memcpy(pixels, VideoSurface12->pixels, pitch * VideoSurface12->h);
  3132     } else {
  3133         const int srcpitch = VideoSurface12->pitch;
  3134         const int cpy = SDL_min(srcpitch, pitch);
  3135         const int h = VideoSurface12->h;
  3136         char *dst = (char *) pixels;
  3137         char *src = (char *) VideoSurface12->pixels;
  3138         for (int i = 0; i < h; i++) {
  3139             SDL_memcpy(dst, src, cpy);
  3140             src += srcpitch;
  3141             dst += pitch;
  3142         }
  3143     }
  3144 
  3145     SDL20_UnlockTexture(VideoTexture20);
  3146     SDL20_RenderCopy(VideoRenderer20, VideoTexture20, NULL, NULL);
  3147     SDL20_RenderPresent(VideoRenderer20);
  3148     VideoSurfaceLastPresentTicks = SDL20_GetTicks();
  3149     VideoSurfacePresentTicks = 0;
  3150 }
  3151 
  3152 DECLSPEC void SDLCALL
  3153 SDL_UpdateRects(SDL12_Surface *surface12, int numrects, SDL12_Rect *rects12)
  3154 {
  3155     /* strangely, SDL 1.2 doesn't check if surface12 is NULL before touching it */
  3156     /* (UpdateRect, singular, does...) */
  3157     if (surface12->flags & SDL12_OPENGL) {
  3158         SDL20_SetError("Use SDL_GL_SwapBuffers() on OpenGL surfaces");
  3159         return;
  3160     }
  3161 
  3162     // everything else is marked SDL12_DOUBLEBUF and SHOULD BE a no-op here,
  3163     //  but in practice most apps never got a double-buffered surface and
  3164     //  don't handle it correctly, so we have to work around it.
  3165     if (surface12 == VideoSurface12) {
  3166         SDL_bool whole_screen = SDL_FALSE;
  3167         if (numrects == 1) {
  3168             const SDL12_Rect *r = rects12;
  3169             if (!r->x && !r->y && !r->w && !r->h) {
  3170                 whole_screen = SDL_TRUE;
  3171             } else if (!r->x && !r->y && (r->w == surface12->w) && (r->h == surface12->h)) {
  3172                 whole_screen = SDL_TRUE;
  3173             }
  3174         }
  3175                 
  3176         if (whole_screen) {  
  3177             PresentScreen();  // flip it now.
  3178         } else {
  3179             VideoSurfacePresentTicks = VideoSurfaceLastPresentTicks + 15;  // flip it later.
  3180         }
  3181     }
  3182 }
  3183 
  3184 DECLSPEC void SDLCALL
  3185 SDL_UpdateRect(SDL12_Surface *screen12, Sint32 x, Sint32 y, Uint32 w, Uint32 h)
  3186 {
  3187     if (screen12) {
  3188         SDL12_Rect rect12;
  3189         rect12.x = (Sint16) x;
  3190         rect12.y = (Sint16) y;
  3191         rect12.w = (Uint16) (w ? w : screen12->w);
  3192         rect12.h = (Uint16) (h ? h : screen12->h);
  3193         SDL_UpdateRects(screen12, 1, &rect12);
  3194     }
  3195 }
  3196 
  3197 DECLSPEC int SDLCALL
  3198 SDL_Flip(SDL12_Surface *surface12)
  3199 {
  3200     if (surface12->flags & SDL12_OPENGL) {
  3201         return SDL20_SetError("Use SDL_GL_SwapBuffers() on OpenGL surfaces");
  3202     }
  3203 
  3204     if (surface12 == VideoSurface12) {
  3205         PresentScreen();
  3206     }
  3207 
  3208     return 0;
  3209 }
  3210 
  3211 DECLSPEC void SDLCALL
  3212 SDL_PumpEvents(void)
  3213 {
  3214     // If the app is doing dirty rectangles, we set a flag and present the
  3215     //  screen surface when they pump for new events if we're close to 60Hz,
  3216     //  which we consider a sign that they are done rendering for the current
  3217     //  frame and it would make sense to send it to the screen.
  3218     if (VideoSurfacePresentTicks && SDL_TICKS_PASSED(SDL20_GetTicks(), VideoSurfacePresentTicks)) {
  3219         PresentScreen();
  3220     }
  3221     SDL20_PumpEvents();
  3222 }
  3223 
  3224 DECLSPEC void SDLCALL
  3225 SDL_WM_SetCaption(const char *title, const char *icon)
  3226 {
  3227     if (WindowTitle) {
  3228         SDL20_free(WindowTitle);
  3229     }
  3230     if (WindowIconTitle) {
  3231         SDL20_free(WindowIconTitle);
  3232     }
  3233     WindowTitle = title ? SDL_strdup(title) : NULL;
  3234     WindowIconTitle = icon ? SDL_strdup(icon) : NULL;
  3235     if (VideoWindow20) {
  3236         SDL20_SetWindowTitle(VideoWindow20, WindowTitle);
  3237     }
  3238 }
  3239 
  3240 DECLSPEC void SDLCALL
  3241 SDL_WM_GetCaption(const char **title, const char **icon)
  3242 {
  3243     if (title) {
  3244         *title = WindowTitle;
  3245     }
  3246     if (icon) {
  3247         *icon = WindowIconTitle;
  3248     }
  3249 }
  3250 
  3251 DECLSPEC void SDLCALL
  3252 SDL_WM_SetIcon(SDL12_Surface *icon12, Uint8 *mask)
  3253 {
  3254 SDL20_SetWindowIcon(VideoWindow20, icon12->surface20);
  3255 return;
  3256 
  3257     // take the mask and zero out those alpha values.
  3258     SDL_BlendMode blendmode = SDL_BLENDMODE_NONE;
  3259     if (SDL20_GetSurfaceBlendMode(icon12->surface20, &blendmode) < 0) {
  3260         return;  // oh well.
  3261     }
  3262 
  3263     Uint32 rmask, gmask, bmask, amask;
  3264     int bpp;
  3265     if (!SDL20_PixelFormatEnumToMasks(SDL_PIXELFORMAT_ARGB8888, &bpp, &rmask, &gmask, &bmask, &amask)) {
  3266         return;  // oh well.
  3267     }
  3268 
  3269     SDL_Surface *icon20 = SDL20_CreateRGBSurface(0, icon12->w, icon12->h, bpp, rmask, gmask, bmask, amask);
  3270     if (!icon20) {
  3271         return;  // oh well.
  3272     }
  3273 
  3274     SDL20_SetSurfaceBlendMode(icon12->surface20, SDL_BLENDMODE_NONE);
  3275     const int rc = SDL20_UpperBlit(icon12->surface20, NULL, icon20, NULL);
  3276     SDL20_SetSurfaceBlendMode(icon12->surface20, blendmode);
  3277     if (rc == 0) {
  3278         SDL_assert(icon20->format->BytesPerPixel == 4);
  3279         SDL_assert(icon20->pitch == icon20->w * 4);
  3280         const int w = icon12->w;
  3281         const int h = icon12->h;
  3282         const int mpitch = (w + 7) / 8;
  3283         Uint32 *ptr = (Uint32 *) icon20->pixels;
  3284         for (int y = 0; y < h; y++) {
  3285             for (int x = 0; x < w; x++, ptr++) {
  3286                 if (!(mask[y*mpitch + x/8] & (128 >> (x % 8)))) {
  3287                     *ptr &= ~amask;
  3288                 }
  3289             }
  3290         }
  3291         SDL20_SetWindowIcon(VideoWindow20, icon20);
  3292         SDL20_FreeSurface(VideoIcon20);
  3293         VideoIcon20 = icon20;
  3294     }
  3295 }
  3296 
  3297 DECLSPEC int SDLCALL
  3298 SDL_WM_IconifyWindow(void)
  3299 {
  3300     SDL20_MinimizeWindow(VideoWindow20);
  3301     return 0;
  3302 }
  3303 
  3304 DECLSPEC int SDLCALL
  3305 SDL_WM_ToggleFullScreen(SDL12_Surface *surface)
  3306 {
  3307     int retval = 0;
  3308     if (surface == VideoSurface12) {
  3309         SDL_assert(VideoWindow20);
  3310         const Uint32 flags20 = SDL20_GetWindowFlags(VideoWindow20);
  3311         if (flags20 & SDL_WINDOW_FULLSCREEN) {
  3312             SDL_assert(VideoSurface12->flags & SDL12_FULLSCREEN);
  3313             retval = (SDL20_SetWindowFullscreen(VideoWindow20, 0) == 0);
  3314             if (retval) {
  3315                 VideoSurface12->flags &= ~SDL12_FULLSCREEN;
  3316             }
  3317         } else {
  3318             SDL_assert((VideoSurface12->flags & SDL12_FULLSCREEN) == 0);
  3319             const Uint32 newflags20 = (VideoSurface12->flags & SDL12_OPENGL) ? SDL_WINDOW_FULLSCREEN : SDL_WINDOW_FULLSCREEN_DESKTOP;
  3320             retval = (SDL20_SetWindowFullscreen(VideoWindow20, newflags20) == 0);
  3321             if (retval) {
  3322                 VideoSurface12->flags |= SDL12_FULLSCREEN;
  3323             }
  3324         }
  3325         if (retval && VideoRenderer20) {
  3326             SDL20_RenderSetLogicalSize(VideoRenderer20, VideoSurface12->w, VideoSurface12->h);
  3327         }
  3328     }
  3329     return retval;
  3330 }
  3331 
  3332 typedef enum
  3333 {
  3334     SDL12_GRAB_QUERY = -1,
  3335     SDL12_GRAB_OFF = 0,
  3336     SDL12_GRAB_ON = 1
  3337 } SDL12_GrabMode;
  3338 
  3339 static void
  3340 UpdateRelativeMouseMode(void)
  3341 {
  3342     // in SDL 1.2, hiding+grabbing the cursor was like SDL2's relative mouse mode.
  3343     if (VideoWindow20) {
  3344         SDL20_SetRelativeMouseMode((VideoWindowGrabbed && VideoCursorHidden) ? SDL_TRUE : SDL_FALSE);
  3345     }
  3346 }
  3347 
  3348 DECLSPEC int SDLCALL
  3349 SDL_ShowCursor(int toggle)
  3350 {
  3351     const int retval = VideoCursorHidden ? 0 : 1;
  3352 
  3353     if (toggle >= 0) {
  3354         const SDL_bool wanthide = (toggle == 0) ? SDL_TRUE : SDL_FALSE;
  3355         if (VideoCursorHidden != wanthide) {
  3356             SDL20_ShowCursor(wanthide ? 0 : 1);
  3357             VideoCursorHidden = wanthide;
  3358             UpdateRelativeMouseMode();
  3359         }
  3360     }
  3361     return retval;
  3362 }
  3363 
  3364 
  3365 DECLSPEC SDL12_GrabMode SDLCALL
  3366 SDL_WM_GrabInput(SDL12_GrabMode mode)
  3367 {
  3368     if (mode != SDL12_GRAB_QUERY) {
  3369         const SDL_bool wantgrab = (mode == SDL12_GRAB_ON) ? SDL_TRUE : SDL_FALSE;
  3370         if (VideoWindowGrabbed != wantgrab) {
  3371             SDL20_SetWindowGrab(VideoWindow20, wantgrab);
  3372             VideoWindowGrabbed = wantgrab;
  3373             UpdateRelativeMouseMode();
  3374         }
  3375     }
  3376     return VideoWindowGrabbed ? SDL12_GRAB_ON : SDL12_GRAB_OFF;
  3377 }
  3378 
  3379 DECLSPEC void SDLCALL
  3380 SDL_WarpMouse(Uint16 x, Uint16 y)
  3381 {
  3382     SDL20_WarpMouseInWindow(VideoWindow20, x, y);
  3383 }
  3384 
  3385 DECLSPEC Uint8 SDLCALL
  3386 SDL_GetAppState(void)
  3387 {
  3388     Uint8 state12 = 0;
  3389     Uint32 flags20 = 0;
  3390 
  3391     flags20 = SDL20_GetWindowFlags(VideoWindow20);
  3392     if ((flags20 & SDL_WINDOW_SHOWN) && !(flags20 & SDL_WINDOW_MINIMIZED)) {
  3393         state12 |= SDL12_APPACTIVE;
  3394     }
  3395     if (flags20 & SDL_WINDOW_INPUT_FOCUS) {
  3396         state12 |= SDL12_APPINPUTFOCUS;
  3397     }
  3398     if (flags20 & SDL_WINDOW_MOUSE_FOCUS) {
  3399         state12 |= SDL12_APPMOUSEFOCUS;
  3400     }
  3401     return state12;
  3402 }
  3403 
  3404 DECLSPEC int SDLCALL
  3405 SDL_SetColorKey(SDL12_Surface *surface12, Uint32 flag12, Uint32 key)
  3406 {
  3407     const SDL_bool addkey = (flag12 & SDL12_SRCCOLORKEY) ? SDL_TRUE : SDL_FALSE;
  3408     const int retval = SDL20_SetColorKey(surface12->surface20, addkey, key);
  3409     if (SDL20_GetColorKey(surface12->surface20, &surface12->format->colorkey) < 0) {
  3410         surface12->format->colorkey = 0;
  3411     }
  3412 
  3413     if (addkey) {
  3414         surface12->flags |= SDL12_SRCCOLORKEY;
  3415     } else {
  3416         surface12->flags &= ~SDL12_SRCCOLORKEY;
  3417     }
  3418 
  3419     return retval;
  3420 }
  3421 
  3422 DECLSPEC int SDLCALL
  3423 SDL_SetPalette(SDL12_Surface *surface12, int flags, const SDL_Color *colors,
  3424                int firstcolor, int ncolors)
  3425 {
  3426     if (!surface12) {
  3427         return 0;  // not an error, a no-op.
  3428     }
  3429 
  3430     SDL12_Palette *palette12 = surface12->format->palette;
  3431     if (!palette12) {
  3432         return 0;  // not an error, a no-op.
  3433     }
  3434 
  3435     SDL_Palette *palette20 = surface12->surface20->format->palette;
  3436     SDL_assert(palette20 != NULL);
  3437 
  3438     // we need to force the "unused" field to 255, since it's "alpha" in SDL2.
  3439     SDL_Color *opaquecolors = (SDL_Color *) SDL20_malloc(sizeof (SDL_Color) * ncolors);
  3440     if (!opaquecolors) {
  3441         return SDL20_OutOfMemory();
  3442     }
  3443 
  3444     // don't SDL_memcpy in case the 'a' field is uninitialized and upsets
  3445     //  memory tools like Valgrind.
  3446     for (int i = 0; i < ncolors; i++) {
  3447         opaquecolors[i].r = colors[i].r;
  3448         opaquecolors[i].g = colors[i].g;
  3449         opaquecolors[i].b = colors[i].b;
  3450         opaquecolors[i].a = 255;
  3451     }
  3452 
  3453     const int retval = SDL20_SetPaletteColors(palette20, opaquecolors, firstcolor, ncolors);
  3454     SDL20_free(opaquecolors);
  3455 
  3456     // in case this pointer changed...
  3457     palette12->colors = palette20->colors;
  3458 
  3459     return retval;
  3460 }
  3461 
  3462 DECLSPEC int SDLCALL
  3463 SDL_SetColors(SDL12_Surface *surface12, const SDL_Color * colors, int firstcolor,
  3464               int ncolors)
  3465 {
  3466     return SDL_SetPalette(surface12, SDL12_LOGPAL | SDL12_PHYSPAL, colors, firstcolor, ncolors);
  3467 }
  3468 
  3469 DECLSPEC int SDLCALL
  3470 SDL_GetWMInfo(SDL_SysWMinfo * info)
  3471 {
  3472     FIXME("write me");
  3473     //return SDL20_GetWindowWMInfo(VideoWindow20, info);
  3474     return SDL20_Unsupported();
  3475 }
  3476 
  3477 DECLSPEC SDL12_Overlay * SDLCALL
  3478 SDL_CreateYUVOverlay(int w, int h, Uint32 format, SDL12_Surface *display)
  3479 {
  3480     FIXME("write me");
  3481     SDL20_Unsupported();
  3482     return NULL;
  3483 }
  3484 
  3485 DECLSPEC int SDLCALL
  3486 SDL_LockYUVOverlay(SDL12_Overlay * overlay)
  3487 {
  3488     FIXME("write me");
  3489     return SDL20_Unsupported();
  3490 }
  3491 
  3492 DECLSPEC void SDLCALL
  3493 SDL_UnlockYUVOverlay(SDL12_Overlay * overlay)
  3494 {
  3495     FIXME("write me");
  3496 }
  3497 
  3498 DECLSPEC int SDLCALL
  3499 SDL_DisplayYUVOverlay(SDL12_Overlay * overlay, SDL12_Rect * dstrect12)
  3500 {
  3501     FIXME("write me");
  3502     return SDL20_Unsupported();
  3503 }
  3504 
  3505 DECLSPEC void SDLCALL
  3506 SDL_FreeYUVOverlay(SDL12_Overlay * overlay)
  3507 {
  3508     FIXME("write me");
  3509 }
  3510 
  3511 DECLSPEC int SDLCALL
  3512 SDL_GL_LoadLibrary(const char *libname)
  3513 {
  3514     /* SDL 1.2 would unload the previous library if one was loaded. SDL2
  3515        reports an error if one is already loaded, and sometimes loads it
  3516        internally for some video targets, so unloading it probably isn't safe.
  3517        There really isn't a good reason to be using anything other than the
  3518        system OpenGL in 2019, so we ignore the error in this case to match 1.2
  3519        behavior, even if you were going to load a different library this time.
  3520        Oh well. */
  3521     const int rc = SDL20_GL_LoadLibrary(libname);
  3522     if (rc == -1) {
  3523         const char *err = SDL20_GetError();
  3524         if (SDL20_strcmp(err, "OpenGL library already loaded") == 0) {
  3525             return 0;
  3526         }
  3527 
  3528         /* reset the actual error. */
  3529         char *dup = SDL20_strdup(err);
  3530         if (!dup) {
  3531             SDL20_OutOfMemory();
  3532         } else {
  3533             SDL20_SetError(dup);
  3534             SDL20_free(dup);
  3535         }
  3536     }
  3537     return rc;
  3538 }
  3539 
  3540 
  3541 DECLSPEC int SDLCALL
  3542 SDL_GL_SetAttribute(SDL12_GLattr attr, int value)
  3543 {
  3544     if (attr >= SDL12_GL_MAX_ATTRIBUTE)
  3545         return SDL20_SetError("Unknown GL attribute");
  3546 
  3547     /* swap control was moved out of this API, everything else lines up. */
  3548     if (attr == SDL12_GL_SWAP_CONTROL)
  3549     {
  3550         SwapInterval = value;
  3551         FIXME("Actually set swap interval somewhere");
  3552         return 0;
  3553     }
  3554 
  3555     return SDL20_GL_SetAttribute((SDL_GLattr) attr, value);
  3556 }
  3557 
  3558 DECLSPEC int SDLCALL
  3559 SDL_GL_GetAttribute(SDL12_GLattr attr, int* value)
  3560 {
  3561     if (attr >= SDL12_GL_MAX_ATTRIBUTE)
  3562         return SDL20_SetError("Unknown GL attribute");
  3563 
  3564     /* swap control was moved out of this API, everything else lines up. */
  3565     if (attr == SDL12_GL_SWAP_CONTROL)
  3566     {
  3567         *value = SDL20_GL_GetSwapInterval();
  3568         return 0;
  3569     }
  3570 
  3571     return SDL20_GL_GetAttribute((SDL_GLattr) attr, value);
  3572 }
  3573 
  3574 
  3575 DECLSPEC void SDLCALL
  3576 SDL_GL_SwapBuffers(void)
  3577 {
  3578     if (VideoWindow20)
  3579         SDL20_GL_SwapWindow(VideoWindow20);
  3580 }
  3581 
  3582 DECLSPEC int SDLCALL
  3583 SDL_SetGamma(float red, float green, float blue)
  3584 {
  3585     Uint16 red_ramp[256];
  3586     Uint16 green_ramp[256];
  3587     Uint16 blue_ramp[256];
  3588 
  3589     SDL20_CalculateGammaRamp(red, red_ramp);
  3590     if (green == red) {
  3591         SDL20_memcpy(green_ramp, red_ramp, sizeof(red_ramp));
  3592     } else {
  3593         SDL20_CalculateGammaRamp(green, green_ramp);
  3594     }
  3595     if (blue == red) {
  3596         SDL20_memcpy(blue_ramp, red_ramp, sizeof(red_ramp));
  3597     } else if (blue == green) {
  3598         SDL20_memcpy(blue_ramp, green_ramp, sizeof(green_ramp));
  3599     } else {
  3600         SDL20_CalculateGammaRamp(blue, blue_ramp);
  3601     }
  3602     return SDL20_SetWindowGammaRamp(VideoWindow20, red_ramp, green_ramp, blue_ramp);
  3603 }
  3604 
  3605 DECLSPEC int SDLCALL
  3606 SDL_SetGammaRamp(const Uint16 *red, const Uint16 *green, const Uint16 *blue)
  3607 {
  3608     return SDL20_SetWindowGammaRamp(VideoWindow20, red, green, blue);
  3609 }
  3610 
  3611 DECLSPEC int SDLCALL
  3612 SDL_GetGammaRamp(Uint16 *red, Uint16 *green, Uint16 *blue)
  3613 {
  3614     return SDL20_GetWindowGammaRamp(VideoWindow20, red, green, blue);
  3615 }
  3616 
  3617 DECLSPEC int SDLCALL
  3618 SDL_EnableKeyRepeat(int delay, int interval)
  3619 {
  3620     FIXME("write me");
  3621     return 0;
  3622 }
  3623 
  3624 DECLSPEC void SDLCALL
  3625 SDL_GetKeyRepeat(int *delay, int *interval)
  3626 {
  3627     FIXME("write me");
  3628     if (delay) {
  3629         *delay = SDL12_DEFAULT_REPEAT_DELAY;
  3630     }
  3631     if (interval) {
  3632         *interval = SDL12_DEFAULT_REPEAT_INTERVAL;
  3633     }
  3634 }
  3635 
  3636 DECLSPEC int SDLCALL
  3637 SDL_EnableUNICODE(int enable)
  3638 {
  3639     FIXME("write me");
  3640     return SDL20_Unsupported();
  3641 }
  3642 
  3643 static Uint32
  3644 SetTimerOld_Callback(Uint32 interval, void* param)
  3645 {
  3646     return ((SDL12_TimerCallback)param)(interval);
  3647 }
  3648 
  3649 DECLSPEC int SDLCALL
  3650 SDL_SetTimer(Uint32 interval, SDL12_TimerCallback callback)
  3651 {
  3652     static SDL_TimerID compat_timer;
  3653 
  3654     if (compat_timer) {
  3655         SDL20_RemoveTimer(compat_timer);
  3656         compat_timer = 0;
  3657     }
  3658 
  3659     if (interval && callback) {
  3660         compat_timer = SDL20_AddTimer(interval, SetTimerOld_Callback, callback);
  3661         if (!compat_timer) {
  3662             return -1;
  3663         }
  3664     }
  3665     return 0;
  3666 }
  3667 
  3668 DECLSPEC int SDLCALL
  3669 SDL_putenv(const char *_var)
  3670 {
  3671     char *ptr = NULL;
  3672     char *var = SDL20_strdup(_var);
  3673     if (var == NULL) {
  3674         return -1;  /* we don't set errno. */
  3675     }
  3676 
  3677     ptr = SDL20_strchr(var, '=');
  3678     if (ptr == NULL) {
  3679         SDL20_free(var);
  3680         return -1;
  3681     }
  3682 
  3683     *ptr = '\0';  /* split the string into name and value. */
  3684     SDL20_setenv(var, ptr + 1, 1);
  3685     SDL20_free(var);
  3686     return 0;
  3687 }
  3688 
  3689 
  3690 
  3691 /* CD-ROM support is gone from SDL 2.0, so just have stubs that fail. */
  3692 
  3693 typedef void *SDL12_CD;  /* close enough.  :) */
  3694 typedef int SDL12_CDstatus;  /* close enough.  :) */
  3695 
  3696 DECLSPEC int SDLCALL
  3697 SDL_CDNumDrives(void)
  3698 {
  3699     FIXME("should return -1 without SDL_INIT_CDROM");
  3700     return 0;
  3701 }
  3702 
  3703 DECLSPEC const char *SDLCALL SDL_CDName(int drive) { SDL20_Unsupported(); return NULL; }
  3704 DECLSPEC SDL12_CD *SDLCALL SDL_CDOpen(int drive) { SDL20_Unsupported(); return NULL; }
  3705 DECLSPEC SDL12_CDstatus SDLCALL SDL_CDStatus(SDL12_CD *cdrom) { return SDL20_Unsupported(); }
  3706 DECLSPEC int SDLCALL SDL_CDPlayTracks(SDL12_CD *cdrom, int start_track, int start_frame, int ntracks, int nframes) { return SDL20_Unsupported(); }
  3707 DECLSPEC int SDLCALL SDL_CDPlay(SDL12_CD *cdrom, int start, int length) { return SDL20_Unsupported(); }
  3708 DECLSPEC int SDLCALL SDL_CDPause(SDL12_CD *cdrom) { return SDL20_Unsupported(); }
  3709 DECLSPEC int SDLCALL SDL_CDResume(SDL12_CD *cdrom) { return SDL20_Unsupported(); }
  3710 DECLSPEC int SDLCALL SDL_CDStop(SDL12_CD *cdrom) { return SDL20_Unsupported(); }
  3711 DECLSPEC int SDLCALL SDL_CDEject(SDL12_CD *cdrom) { return SDL20_Unsupported(); }
  3712 DECLSPEC void SDLCALL SDL_CDClose(SDL12_CD *cdrom) {}
  3713 
  3714 
  3715 #ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
  3716 DECLSPEC SDL_Thread * SDLCALL
  3717 SDL_CreateThread(int (SDLCALL *fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
  3718 {
  3719     return SDL20_CreateThread(fn, NULL, data, pfnBeginThread, pfnEndThread);
  3720 }
  3721 #else
  3722 DECLSPEC SDL_Thread * SDLCALL
  3723 SDL_CreateThread(int (SDLCALL *fn)(void *), void *data)
  3724 {
  3725     return SDL20_CreateThread(fn, NULL, data);
  3726 }
  3727 #endif
  3728 
  3729 DECLSPEC int SDLCALL
  3730 SDL_mutexP(SDL_mutex *mutex)
  3731 {
  3732     return SDL20_LockMutex(mutex);
  3733 }
  3734 
  3735 DECLSPEC int SDLCALL
  3736 SDL_mutexV(SDL_mutex *mutex)
  3737 {
  3738     return SDL20_UnlockMutex(mutex);
  3739 }
  3740 
  3741 DECLSPEC void SDLCALL
  3742 SDL_KillThread(SDL_Thread *thread)
  3743 {
  3744     FIXME("Removed from 2.0; do nothing. We can't even report failure.");
  3745     fprintf(stderr,
  3746         "WARNING: this app used SDL_KillThread(), an unforgivable curse.\n"
  3747         "This program should be fixed. No thread was actually harmed.\n");
  3748 }
  3749 
  3750 /* This changed from an opaque pointer to an int in 2.0. */
  3751 typedef struct _SDL12_TimerID *SDL12_TimerID;
  3752 SDL_COMPILE_TIME_ASSERT(timer, sizeof(SDL12_TimerID) >= sizeof(SDL_TimerID));
  3753 
  3754 
  3755 DECLSPEC SDL12_TimerID SDLCALL
  3756 SDL_AddTimer(Uint32 interval, SDL12_NewTimerCallback callback, void *param)
  3757 {
  3758     return (SDL12_TimerID) ((size_t) SDL20_AddTimer(interval, callback, param));
  3759 }
  3760 
  3761 DECLSPEC SDL_bool SDLCALL
  3762 SDL_RemoveTimer(SDL12_TimerID id)
  3763 {
  3764     return SDL20_RemoveTimer((SDL_TimerID) ((size_t)id));
  3765 }
  3766 
  3767 
  3768 typedef struct SDL12_RWops {
  3769     int (SDLCALL *seek)(struct SDL12_RWops *context, int offset, int whence);
  3770     int (SDLCALL *read)(struct SDL12_RWops *context, void *ptr, int size, int maxnum);
  3771     int (SDLCALL *write)(struct SDL12_RWops *context, const void *ptr, int size, int num);
  3772     int (SDLCALL *close)(struct SDL12_RWops *context);
  3773     Uint32 type;
  3774     void *padding[8];
  3775     SDL_RWops *rwops20;
  3776 } SDL12_RWops;
  3777 
  3778 
  3779 DECLSPEC SDL12_RWops * SDLCALL
  3780 SDL_AllocRW(void)
  3781 {
  3782     SDL12_RWops *rwops = (SDL12_RWops *) SDL20_malloc(sizeof (SDL12_RWops));
  3783     if (!rwops)
  3784         SDL20_OutOfMemory();
  3785     return rwops;
  3786 }
  3787 
  3788 DECLSPEC void SDLCALL
  3789 SDL_FreeRW(SDL12_RWops *rwops12)
  3790 {
  3791     SDL20_free(rwops12);
  3792 }
  3793 
  3794 static int SDLCALL
  3795 RWops20to12_seek(struct SDL12_RWops *rwops12, int offset, int whence)
  3796 {
  3797     return rwops12->rwops20->seek(rwops12->rwops20, offset, whence);
  3798 }
  3799 
  3800 static int SDLCALL
  3801 RWops20to12_read(struct SDL12_RWops *rwops12, void *ptr, int size, int maxnum)
  3802 {
  3803     return rwops12->rwops20->read(rwops12->rwops20, ptr, size, maxnum);
  3804 }
  3805 
  3806 static int SDLCALL
  3807 RWops20to12_write(struct SDL12_RWops *rwops12, const void *ptr, int size, int num)
  3808 {
  3809     return rwops12->rwops20->write(rwops12->rwops20, ptr, size, num);
  3810 }
  3811 
  3812 static int SDLCALL
  3813 RWops20to12_close(struct SDL12_RWops *rwops12)
  3814 {
  3815     int rc = 0;
  3816     if (rwops12)
  3817     {
  3818         rc = rwops12->rwops20->close(rwops12->rwops20);
  3819         if (rc == 0)
  3820             SDL_FreeRW(rwops12);
  3821     }
  3822     return rc;
  3823 }
  3824 
  3825 static SDL12_RWops *
  3826 RWops20to12(SDL_RWops *rwops20)
  3827 {
  3828     SDL12_RWops *rwops12;
  3829 
  3830     if (!rwops20)
  3831         return NULL;
  3832 
  3833     rwops12 = SDL_AllocRW();
  3834     if (!rwops12)
  3835         return NULL;
  3836 
  3837     SDL20_zerop(rwops12);
  3838     rwops12->type = rwops20->type;
  3839     rwops12->rwops20 = rwops20;
  3840     rwops12->seek = RWops20to12_seek;
  3841     rwops12->read = RWops20to12_read;
  3842     rwops12->write = RWops20to12_write;
  3843     rwops12->close = RWops20to12_close;
  3844 
  3845     return rwops12;
  3846 }
  3847 
  3848 DECLSPEC SDL12_RWops * SDLCALL
  3849 SDL_RWFromFile(const char *file, const char *mode)
  3850 {
  3851     if ( !file || !*file || !mode || !*mode ) {
  3852         SDL_SetError("SDL_RWFromFile(): No file or no mode specified");
  3853         return NULL;
  3854     }
  3855     return RWops20to12(SDL20_RWFromFile(file, mode));
  3856 }
  3857 
  3858 DECLSPEC SDL12_RWops * SDLCALL
  3859 SDL_RWFromFP(FILE *io, int autoclose)
  3860 {
  3861     return RWops20to12(SDL20_RWFromFP(io, autoclose));
  3862 }
  3863 
  3864 DECLSPEC SDL12_RWops * SDLCALL
  3865 SDL_RWFromMem(void *mem, int size)
  3866 {
  3867     return RWops20to12(SDL20_RWFromMem(mem, size));
  3868 }
  3869 
  3870 DECLSPEC SDL12_RWops * SDLCALL
  3871 SDL_RWFromConstMem(const void *mem, int size)
  3872 {
  3873     return RWops20to12(SDL20_RWFromConstMem(mem, size));
  3874 }
  3875 
  3876 #define READ_AND_BYTESWAP(endian, bits) \
  3877     DECLSPEC Uint##bits SDLCALL SDL_Read##endian##bits(SDL12_RWops *rwops12) { \
  3878         Uint##bits val; rwops12->read(rwops12, &val, sizeof (val), 1); \
  3879         return SDL_Swap##endian##bits(val); \
  3880     }
  3881 
  3882 READ_AND_BYTESWAP(LE,16)
  3883 READ_AND_BYTESWAP(BE,16)
  3884 READ_AND_BYTESWAP(LE,32)
  3885 READ_AND_BYTESWAP(BE,32)
  3886 READ_AND_BYTESWAP(LE,64)
  3887 READ_AND_BYTESWAP(BE,64)
  3888 #undef READ_AND_BYTESWAP
  3889 
  3890 #define BYTESWAP_AND_WRITE(endian, bits) \
  3891     DECLSPEC int SDLCALL SDL_Write##endian##bits(SDL12_RWops *rwops12, Uint##bits val) { \
  3892         val = SDL_Swap##endian##bits(val); \
  3893         return rwops12->write(rwops12, &val, sizeof (val), 1); \
  3894     }
  3895 BYTESWAP_AND_WRITE(LE,16)
  3896 BYTESWAP_AND_WRITE(BE,16)
  3897 BYTESWAP_AND_WRITE(LE,32)
  3898 BYTESWAP_AND_WRITE(BE,32)
  3899 BYTESWAP_AND_WRITE(LE,64)
  3900 BYTESWAP_AND_WRITE(BE,64)
  3901 #undef BYTESWAP_AND_WRITE
  3902 
  3903 
  3904 static Sint64 SDLCALL
  3905 RWops12to20_size(struct SDL_RWops *rwops20)
  3906 {
  3907     SDL12_RWops *rwops12 = (SDL12_RWops *) rwops20->hidden.unknown.data1;
  3908     int size = (int) ((size_t) rwops20->hidden.unknown.data2);
  3909     int pos;
  3910 
  3911     if (size != -1)
  3912         return size;
  3913 
  3914     pos = rwops12->seek(rwops12, 0, SEEK_CUR);
  3915     if (pos == -1)
  3916         return -1;
  3917 
  3918     size = (Sint64) rwops12->seek(rwops12, 0, SEEK_END);
  3919     if (size == -1)
  3920         return -1;
  3921 
  3922     rwops12->seek(rwops12, pos, SEEK_SET);  FIXME("...and if this fails?");
  3923     rwops20->hidden.unknown.data2 = (void *) ((size_t) size);
  3924     return size;
  3925 }
  3926 
  3927 static Sint64 SDLCALL
  3928 RWops12to20_seek(struct SDL_RWops *rwops20, Sint64 offset, int whence)
  3929 {
  3930     FIXME("fail if (offset) is too big");
  3931     SDL12_RWops *rwops12 = (SDL12_RWops *) rwops20->hidden.unknown.data1;
  3932     return (Sint64) rwops12->seek(rwops12, (int) offset, whence);
  3933 }
  3934 
  3935 static size_t SDLCALL
  3936 RWops12to20_read(struct SDL_RWops *rwops20, void *ptr, size_t size, size_t maxnum)
  3937 {
  3938     FIXME("fail if (size) or (maxnum) is too big");
  3939     SDL12_RWops *rwops12 = (SDL12_RWops *) rwops20->hidden.unknown.data1;
  3940     return (size_t) rwops12->read(rwops12, ptr, (int) size, (int) maxnum);
  3941 }
  3942 
  3943 static size_t SDLCALL
  3944 RWops12to20_write(struct SDL_RWops *rwops20, const void *ptr, size_t size, size_t num)
  3945 {
  3946     FIXME("fail if (size) or (maxnum) is too big");
  3947     SDL12_RWops *rwops12 = (SDL12_RWops *) rwops20->hidden.unknown.data1;
  3948     return (size_t) rwops12->write(rwops12, ptr, (int) size, (int) num);
  3949 }
  3950 
  3951 static int SDLCALL
  3952 RWops12to20_close(struct SDL_RWops *rwops20)
  3953 {
  3954     int rc = 0;
  3955     if (rwops20)
  3956     {
  3957         SDL12_RWops *rwops12 = (SDL12_RWops *) rwops20->hidden.unknown.data1;
  3958         rc = rwops12->close(rwops12);
  3959         if (rc == 0)
  3960             SDL20_FreeRW(rwops20);
  3961     }
  3962     return rc;
  3963 }
  3964 
  3965 static SDL_RWops *
  3966 RWops12to20(SDL12_RWops *rwops12)
  3967 {
  3968     SDL_RWops *rwops20;
  3969 
  3970     if (!rwops12)
  3971         return NULL;
  3972 
  3973     rwops20 = SDL20_AllocRW();
  3974     if (!rwops20)
  3975         return NULL;
  3976 
  3977     SDL20_zerop(rwops20);
  3978     rwops20->type = rwops12->type;
  3979     rwops20->hidden.unknown.data1 = rwops12;
  3980     rwops20->hidden.unknown.data2 = (void *) ((size_t) -1);  /* cached size of stream */
  3981     rwops20->size = RWops12to20_size;
  3982     rwops20->seek = RWops12to20_seek;
  3983     rwops20->read = RWops12to20_read;
  3984     rwops20->write = RWops12to20_write;
  3985     rwops20->close = RWops12to20_close;
  3986     return rwops20;
  3987 }
  3988 
  3989 DECLSPEC SDL12_Surface * SDLCALL
  3990 SDL_LoadBMP_RW(SDL12_RWops *rwops12, int freerwops12)
  3991 {
  3992     SDL_RWops *rwops20 = RWops12to20(rwops12);
  3993     SDL_Surface *surface20 = SDL20_LoadBMP_RW(rwops20, freerwops12);
  3994     SDL12_Surface *surface12 = Surface20to12(surface20);
  3995     if (!freerwops12)  /* free our wrapper if SDL2 didn't close it. */
  3996         SDL20_FreeRW(rwops20);
  3997     if ((!surface12) && (surface20))
  3998         SDL20_FreeSurface(surface20);
  3999     return surface12;
  4000 }
  4001 
  4002 DECLSPEC int SDLCALL
  4003 SDL_SaveBMP_RW(SDL12_Surface *surface12, SDL12_RWops *rwops12, int freerwops12)
  4004 {
  4005     FIXME("wrap surface");
  4006     SDL_RWops *rwops20 = RWops12to20(rwops12);
  4007     const int retval = SDL20_SaveBMP_RW(surface12->surface20, rwops20, freerwops12);
  4008     if (!freerwops12)  /* free our wrapper if SDL2 didn't close it. */
  4009         SDL20_FreeRW(rwops20);
  4010     return retval;
  4011 }
  4012 
  4013 DECLSPEC SDL_AudioSpec * SDLCALL
  4014 SDL_LoadWAV_RW(SDL12_RWops *rwops12, int freerwops12,
  4015                SDL_AudioSpec *spec, Uint8 **buf, Uint32 *len)
  4016 {
  4017     SDL_RWops *rwops20 = RWops12to20(rwops12);
  4018     SDL_AudioSpec *retval = SDL20_LoadWAV_RW(rwops20, freerwops12, spec, buf, len);
  4019     FIXME("deal with non-1.2 formats, like float32");
  4020     if (!freerwops12)  /* free our wrapper if SDL2 didn't close it. */
  4021         SDL20_FreeRW(rwops20);
  4022     return retval;
  4023 }
  4024 
  4025 typedef struct
  4026 {
  4027     void (SDLCALL *app_callback)(void *userdata, Uint8 *stream, int len);
  4028     void *app_userdata;
  4029     Uint8 silence;
  4030 } AudioCallbackWrapperData;
  4031 
  4032 static void SDLCALL
  4033 AudioCallbackWrapper(void *userdata, Uint8 *stream, int len)
  4034 {
  4035     AudioCallbackWrapperData *data = (AudioCallbackWrapperData *) userdata;
  4036     SDL_memset(stream, data->silence, len);  // SDL2 doesn't clear the stream before calling in here, but 1.2 expects it.
  4037     data->app_callback(data->app_userdata, stream, len);
  4038 }
  4039 
  4040 
  4041 DECLSPEC int SDLCALL
  4042 SDL_OpenAudio(SDL_AudioSpec *want, SDL_AudioSpec *obtained)
  4043 {
  4044     // SDL2 uses a NULL callback to mean "we play to use SDL_QueueAudio()"
  4045     if (want && (want->callback == NULL)) {
  4046         return SDL20_SetError("Callback can't be NULL");
  4047     }
  4048 
  4049     AudioCallbackWrapperData *data = (AudioCallbackWrapperData *) SDL20_calloc(1, sizeof (AudioCallbackWrapperData));
  4050     if (!data) {
  4051         return SDL20_OutOfMemory();
  4052     }
  4053     data->app_callback = want->callback;
  4054     data->app_userdata = want->userdata;
  4055     want->callback = AudioCallbackWrapper;
  4056     want->userdata = data;
  4057 
  4058     FIXME("Don't allow int32 or float32");
  4059     FIXME("clamp output to mono/stereo");
  4060     const int retval = SDL20_OpenAudio(want, obtained);
  4061     want->callback = data->app_callback;
  4062     want->userdata = data->app_userdata;
  4063     if (retval == -1) {
  4064         SDL20_free(data);
  4065     } else {
  4066         FIXME("memory leak on callback data");
  4067         if (!obtained) {
  4068             data->silence = want->silence;
  4069         } else {
  4070             data->silence = obtained->silence;
  4071             obtained->callback = data->app_callback;
  4072             obtained->userdata = data->app_userdata;
  4073         }
  4074     }
  4075 
  4076     return retval;
  4077 }
  4078 
  4079 
  4080 
  4081 /* vi: set ts=4 sw=4 expandtab: */