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SDL12_compat.c
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/*
Simple DirectMedia Layer
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Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
/* This file contains functions for backwards compatibility with SDL 1.2 */
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#include "SDL20_include_wrapper.h"
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#if !SDL_VERSION_ATLEAST(2,0,0)
#error You need to compile against SDL 2.0 headers.
#endif
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/*
* We report the library version as 1.2.$(SDL12_COMPAT_VERSION). This number
* should be way ahead of what SDL-1.2 Classic would report, so apps can
* decide if they're running under the compat layer, if they really care.
*/
#define SDL12_COMPAT_VERSION 50
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#include <stdarg.h>
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// !!! IMPLEMENT_ME SDL_ConvertSurface
// !!! IMPLEMENT_ME SDL_GetKeyName
// !!! IMPLEMENT_ME SDL_GetKeyState
// !!! IMPLEMENT_ME SDL_GetModState
// !!! IMPLEMENT_ME SDL_GetRelativeMouseState
// !!! IMPLEMENT_ME SDL_LockSurface
// !!! IMPLEMENT_ME SDL_LowerBlit
// !!! IMPLEMENT_ME SDL_SetColorKey
// !!! IMPLEMENT_ME SDL_SetModState
// !!! IMPLEMENT_ME SDL_SoftStretch
// !!! IMPLEMENT_ME SDL_UnlockSurface
// !!! IMPLEMENT_ME SDL_UpperBlit
// !!! IMPLEMENT_ME X11_KeyToUnicode
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#define SDL20_SYM(rc,fn,params,args,ret) \
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typedef rc (SDLCALL *SDL20_##fn##_t) params; \
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static SDL20_##fn##_t SDL20_##fn = NULL;
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#define SDL20_SYM_PASSTHROUGH(rc,fn,params,args,ret) \
SDL20_SYM(rc,fn,params,args,ret)
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#include "SDL20_syms.h"
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#undef SDL20_SYM_PASSTHROUGH
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#undef SDL20_SYM
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typedef int (SDLCALL *SDL20_SetError_t)(const char *fmt, ...);
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static SDL20_SetError_t SDL20_SetError = NULL;
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/* Things that _should_ be binary compatible pass right through... */
#define SDL20_SYM(rc,fn,params,args,ret)
#define SDL20_SYM_PASSTHROUGH(rc,fn,params,args,ret) \
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DECLSPEC rc SDLCALL SDL_##fn params { ret SDL20_##fn args; }
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#include "SDL20_syms.h"
#undef SDL20_SYM_PASSTHROUGH
#undef SDL20_SYM
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/* these are macros (etc) in the SDL headers, so make our own. */
#define SDL20_OutOfMemory() SDL20_Error(SDL_ENOMEM)
#define SDL20_Unsupported() SDL20_Error(SDL_UNSUPPORTED)
#define SDL20_InvalidParamError(param) SDL20_SetError("Parameter '%s' is invalid", (param))
#define SDL20_zero(x) SDL20_memset(&(x), 0, sizeof((x)))
#define SDL20_zerop(x) SDL20_memset((x), 0, sizeof(*(x)))
#define SDL_ReportAssertion SDL20_ReportAssertion
#define SDL12_DEFAULT_REPEAT_DELAY 500
#define SDL12_DEFAULT_REPEAT_INTERVAL 30
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#define SDL12_INIT_TIMER 0x00000001
#define SDL12_INIT_AUDIO 0x00000010
#define SDL12_INIT_VIDEO 0x00000020
#define SDL12_INIT_CDROM 0x00000100
#define SDL12_INIT_JOYSTICK 0x00000200
#define SDL12_INIT_NOPARACHUTE 0x00100000
#define SDL12_INIT_EVENTTHREAD 0x01000000
#define SDL12_INIT_EVERYTHING 0x0000FFFF
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typedef struct SDL12_Palette
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{
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int ncolors;
SDL_Color *colors;
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} SDL12_Palette;
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typedef struct SDL12_PixelFormat
{
SDL12_Palette *palette;
Uint8 BitsPerPixel;
Uint8 BytesPerPixel;
Uint8 Rloss;
Uint8 Gloss;
Uint8 Bloss;
Uint8 Aloss;
Uint8 Rshift;
Uint8 Gshift;
Uint8 Bshift;
Uint8 Ashift;
Uint32 Rmask;
Uint32 Gmask;
Uint32 Bmask;
Uint32 Amask;
Uint32 colorkey;
Uint8 alpha;
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} SDL12_PixelFormat;
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typedef struct SDL12_Surface
{
Uint32 flags;
SDL12_PixelFormat *format;
int w;
int h;
Uint16 pitch;
void *pixels;
int offset;
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SDL_Surface *surface20; /* the real SDL 1.2 has an opaque pointer to a platform-specific thing here named "hwdata". */
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SDL_Rect clip_rect;
Uint32 unused1;
Uint32 locked;
void *blitmap;
unsigned int format_version;
int refcount;
} SDL12_Surface;
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typedef struct
{
Uint32 hw_available :1;
Uint32 wm_available :1;
Uint32 UnusedBits1 :6;
Uint32 UnusedBits2 :1;
Uint32 blit_hw :1;
Uint32 blit_hw_CC :1;
Uint32 blit_hw_A :1;
Uint32 blit_sw :1;
Uint32 blit_sw_CC :1;
Uint32 blit_sw_A :1;
Uint32 blit_fill :1;
Uint32 UnusedBits3 :16;
Uint32 video_mem;
SDL_PixelFormat *vfmt;
int current_w;
int current_h;
} SDL12_VideoInfo;
#define SDL12_HWSURFACE 0x00000001
#define SDL12_ASYNCBLIT 0x00000004
#define SDL12_ANYFORMAT 0x10000000
#define SDL12_HWPALETTE 0x20000000
#define SDL12_DOUBLEBUF 0x40000000
#define SDL12_FULLSCREEN 0x80000000
#define SDL12_OPENGL 0x00000002
#define SDL12_OPENGLBLIT 0x0000000A
#define SDL12_RESIZABLE 0x00000010
#define SDL12_NOFRAME 0x00000020
#define SDL12_HWACCEL 0x00000100
#define SDL12_SRCCOLORKEY 0x00001000
#define SDL12_RLEACCELOK 0x00002000
#define SDL12_RLEACCEL 0x00004000
#define SDL12_SRCALPHA 0x00010000
#define SDL12_PREALLOC 0x01000000
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typedef enum
{
SDL12_NOEVENT = 0,
SDL12_ACTIVEEVENT,
SDL12_KEYDOWN,
SDL12_KEYUP,
SDL12_MOUSEMOTION,
SDL12_MOUSEBUTTONDOWN,
SDL12_MOUSEBUTTONUP,
SDL12_JOYAXISMOTION,
SDL12_JOYBALLMOTION,
SDL12_JOYHATMOTION,
SDL12_JOYBUTTONDOWN,
SDL12_JOYBUTTONUP,
SDL12_QUIT,
SDL12_SYSWMEVENT,
SDL12_EVENT_RESERVEDA,
SDL12_EVENT_RESERVEDB,
SDL12_VIDEORESIZE,
SDL12_VIDEOEXPOSE,
SDL12_USEREVENT = 24,
SDL12_NUMEVENTS = 32
} SDL12_EventType;
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#define SDL12_APPMOUSEFOCUS (1<<0)
#define SDL12_APPINPUTFOCUS (1<<1)
#define SDL12_APPACTIVE (1<<2)
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typedef struct
{
Uint8 type;
Uint8 gain;
Uint8 state;
} SDL12_ActiveEvent;
typedef struct
{
Uint8 type;
Uint8 which;
Uint8 state;
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//FIXME: SDL12_keysym keysym;
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} SDL12_KeyboardEvent;
typedef struct
{
Uint8 type;
Uint8 which;
Uint8 state;
Uint16 x, y;
Sint16 xrel;
Sint16 yrel;
} SDL12_MouseMotionEvent;
typedef struct
{
Uint8 type;
Uint8 which;
Uint8 button;
Uint8 state;
Uint16 x, y;
} SDL12_MouseButtonEvent;
typedef struct
{
Uint8 type;
Uint8 which;
Uint8 axis;
Sint16 value;
} SDL12_JoyAxisEvent;
typedef struct
{
Uint8 type;
Uint8 which;
Uint8 ball;
Sint16 xrel;
Sint16 yrel;
} SDL12_JoyBallEvent;
typedef struct
{
Uint8 type;
Uint8 which;
Uint8 hat;
Uint8 value;
} SDL12_JoyHatEvent;
typedef struct
{
Uint8 type;
Uint8 which;
Uint8 button;
Uint8 state;
} SDL12_JoyButtonEvent;
typedef struct
{
Uint8 type;
int w;
int h;
} SDL12_ResizeEvent;
typedef struct
{
Uint8 type;
} SDL12_ExposeEvent;
typedef struct
{
Uint8 type;
} SDL12_QuitEvent;
typedef struct
{
Uint8 type;
int code;
void *data1;
void *data2;
} SDL12_UserEvent;
typedef struct
{
Uint8 type;
void *msg;
} SDL12_SysWMEvent;
typedef union
{
Uint8 type;
SDL12_ActiveEvent active;
SDL12_KeyboardEvent key;
SDL12_MouseMotionEvent motion;
SDL12_MouseButtonEvent button;
SDL12_JoyAxisEvent jaxis;
SDL12_JoyBallEvent jball;
SDL12_JoyHatEvent jhat;
SDL12_JoyButtonEvent jbutton;
SDL12_ResizeEvent resize;
SDL12_ExposeEvent expose;
SDL12_QuitEvent quit;
SDL12_UserEvent user;
SDL12_SysWMEvent syswm;
} SDL12_Event;
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typedef int (SDLCALL *SDL12_EventFilter)(const SDL12_Event *event12);
static int EventFilter20to12(void *data, SDL_Event *event20);
typedef Uint32 (SDLCALL *SDL12_TimerCallback)(Uint32 interval);
typedef SDL_TimerCallback SDL12_NewTimerCallback;
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typedef struct
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{
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SDL_Rect area;
Sint16 hot_x;
Sint16 hot_y;
Uint8 *data;
Uint8 *mask;
Uint8 *save[2];
SDL_Cursor *wm_cursor; /* the real SDL 1.2 has an opaque pointer to a platform-specific cursor here. */
} SDL12_Cursor;
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typedef enum
{
SDL12_GL_RED_SIZE,
SDL12_GL_GREEN_SIZE,
SDL12_GL_BLUE_SIZE,
SDL12_GL_ALPHA_SIZE,
SDL12_GL_BUFFER_SIZE,
SDL12_GL_DOUBLEBUFFER,
SDL12_GL_DEPTH_SIZE,
SDL12_GL_STENCIL_SIZE,
SDL12_GL_ACCUM_RED_SIZE,
SDL12_GL_ACCUM_GREEN_SIZE,
SDL12_GL_ACCUM_BLUE_SIZE,
SDL12_GL_ACCUM_ALPHA_SIZE,
SDL12_GL_STEREO,
SDL12_GL_MULTISAMPLEBUFFERS,
SDL12_GL_MULTISAMPLESAMPLES,
SDL12_GL_ACCELERATED_VISUAL,
SDL12_GL_SWAP_CONTROL,
SDL12_GL_MAX_ATTRIBUTE
} SDL12_GLattr;
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typedef struct
{
Uint32 format;
SDL_Rect *modeslist;
SDL_Rect **modes; /* ptrs to each item in modeslist, for SDL_ListModes() */
} VideoModeList;
static VideoModeList *VideoModes = NULL;
static int VideoModesCount = 0;
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static SDL12_VideoInfo VideoInfo;
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static SDL_Window *VideoWindow20 = NULL;
static SDL12_Surface *WindowSurface = NULL;
static SDL12_Surface *VideoSurface = NULL;
static SDL12_Surface *ShadowSurface = NULL;
static SDL12_Surface *PublicSurface = NULL;
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static SDL_GLContext *VideoContext = NULL;
static Uint32 VideoFlags = 0;
static SDL_Rect VideoViewport;
static char *WindowTitle = NULL;
static char *WindowIconTitle = NULL;
static SDL_Surface *VideoIcon;
static int EnabledUnicode = 0;
static int VideoDisplayIndex = 0;
static int CDRomInit = 0;
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static SDL12_EventFilter EventFilter12 = NULL;
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static SDL12_Cursor *CurrentCursor = NULL;
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static Uint8 EventStates[SDL12_NUMEVENTS];
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static int SwapInterval = 0;
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// !!! FIXME: need a mutex for the event queue.
#define SDL12_MAXEVENTS 128
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typedef struct EventQueueType
{
SDL12_Event event12;
struct EventQueueType *next;
} EventQueueType;
static EventQueueType EventQueuePool[SDL12_MAXEVENTS];
static EventQueueType *EventQueueHead = NULL;
static EventQueueType *EventQueueTail = NULL;
static EventQueueType *EventQueueAvailable = NULL;
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/* Obviously we can't use SDL_LoadObject() to load SDL2. :) */
#if defined(_WINDOWS)
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#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
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#define SDL20_LIBNAME "SDL2.dll"
static HANDLE Loaded_SDL20 = NULL;
#define LoadSDL20Library() ((Loaded_SDL20 = LoadLibraryA(SDL20_LIBNAME)) != NULL)
#define LookupSDL20Sym(sym) GetProcAddress(Loaded_SDL20, sym)
#define CloseSDL20Library() { { if (Loaded_SDL20) { FreeLibrary(Loaded_SDL20); Loaded_SDL20 = NULL; } }
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#elif defined(unix) || defined(__APPLE__)
#include <dlfcn.h>
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#ifdef __APPLE__
#define SDL20_LIBNAME "libSDL2.dylib"
#else
#define SDL20_LIBNAME "libSDL2-2.0.so.0"
#endif
static void *Loaded_SDL20 = NULL;
#define LoadSDL20Library() ((Loaded_SDL20 = dlopen(SDL20_LIBNAME, RTLD_LOCAL)) != NULL)
#define LookupSDL20Sym(sym) dlsym(Loaded_SDL20, sym)
#define CloseSDL20Library() { if (Loaded_SDL20) { dlclose(Loaded_SDL20); Loaded_SDL20 = NULL; } }
#else
#error Please define your platform.
#endif
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static void *
LoadSDL20Symbol(const char *fn, int *okay)
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{
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void *retval = NULL;
if (*okay) /* only bother trying if we haven't previously failed. */
{
retval = LookupSDL20Sym(fn);
if (retval == NULL)
*okay = 0;
}
return retval;
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}
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static void
UnloadSDL20(void)
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{
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#define SDL20_SYM(rc,fn,params,args,ret) SDL20_##fn = NULL;
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#define SDL20_SYM_PASSTHROUGH(rc,fn,params,args,ret) SDL20_SYM(rc,fn,params,args,ret)
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#include "SDL20_syms.h"
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#undef SDL20_SYM_PASSTHROUGH
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#undef SDL20_SYM
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SDL20_SetError = NULL;
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CloseSDL20Library();
}
static int
LoadSDL20(void)
{
int okay = 1;
if (!Loaded_SDL20)
{
okay = LoadSDL20Library();
#define SDL20_SYM(rc,fn,params,args,ret) SDL20_##fn = (SDL20_##fn##_t) LoadSDL20Symbol("SDL_" #fn, &okay);
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#define SDL20_SYM_PASSTHROUGH(rc,fn,params,args,ret) SDL20_SYM(rc,fn,params,args,ret)
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#include "SDL20_syms.h"
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#undef SDL20_SYM_PASSTHROUGH
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#undef SDL20_SYM
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SDL20_SetError = (SDL20_SetError_t) LoadSDL20Symbol("SDL_SetError", &okay);
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if (!okay)
UnloadSDL20();
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}
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return okay;
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}
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DECLSPEC const SDL_version * SDLCALL
SDL_Linked_Version(void)
{
static const SDL_version version = { 1, 2, SDL12_COMPAT_VERSION };
return &version;
}
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static int
GetVideoDisplay()
{
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// !!! FIXME: cache this value during SDL_Init() so it doesn't change.
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const char *variable = SDL_getenv("SDL_VIDEO_FULLSCREEN_DISPLAY");
if ( !variable ) {
variable = SDL_getenv("SDL_VIDEO_FULLSCREEN_HEAD");
}
if ( variable ) {
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return SDL20_atoi(variable);
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} else {
return 0;
}
}
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/* This sets up VideoModes and VideoModesCount. You end up with arrays by pixel
format, each with a value that 1.2's SDL_ListModes() can return. */
static int
Init12VidModes(void)
{
const int total = SDL20_GetNumDisplayModes(VideoDisplayIndex);
VideoModeList *vmode = NULL;
int num_modes = 0;
void *ptr = NULL;
int i, j;
SDL_assert(VideoModes == NULL);
SDL_assert(VideoModesCount == 0);
for (i = 0; i < total; ++i) {
SDL_DisplayMode mode;
if (SDL20_GetDisplayMode(VideoDisplayIndex, i, &mode) == -1) {
continue;
} else if (!mode.w || !mode.h) {
SDL_assert(0 && "Can this actually happen?");
continue;
}
if (!vmode || (mode.format != vmode->format)) { // SDL20_GetDisplayMode() sorts on bpp first. We know when to change arrays.
if (VideoModesCount > 0) {
VideoModes[VideoModesCount-1].modes[num_modes] = NULL;
}
ptr = (VideoModeList *) SDL20_realloc(VideoModes, sizeof (VideoModeList) * (VideoModesCount+1));
if (!ptr) {
return SDL20_OutOfMemory();
}
VideoModes = (VideoModeList *) ptr;
vmode = &VideoModes[VideoModesCount];
vmode->format = mode.format;
vmode->modeslist = NULL;
vmode->modes = NULL;
VideoModesCount++;
num_modes = 0;
}
/* make sure we don't have this one already (with a different refresh rate, etc). */
for (j = 0; j < num_modes; j++) {
if ((vmode->modeslist[j].w == mode.w) && (vmode->modeslist[j].h == mode.h)) {
break;
}
}
if (j < num_modes) {
continue; /* already have this one. */
}
ptr = SDL20_realloc(vmode->modes, sizeof (SDL_Rect *) * (num_modes + 2));
if (ptr == NULL) {
return SDL20_OutOfMemory();
}
vmode->modes = (SDL_Rect **) ptr;
ptr = SDL20_realloc(vmode->modeslist, sizeof (SDL_Rect) * (num_modes + 1));
if (ptr == NULL) {
return SDL20_OutOfMemory();
}
vmode->modeslist = (SDL_Rect *) ptr;
vmode->modeslist[num_modes].x = 0;
vmode->modeslist[num_modes].y = 0;
vmode->modeslist[num_modes].w = mode.w;
vmode->modeslist[num_modes].h = mode.h;
vmode->modes[num_modes] = &vmode->modeslist[num_modes];
num_modes++;
}
if (VideoModesCount > 0) {
VideoModes[VideoModesCount-1].modes[num_modes] = NULL;
}
return 0;
}
static int
Init12Video(void)
{
int i;
for (i = 0; i < SDL12_MAXEVENTS-1; i++)
EventQueuePool[i].next = &EventQueuePool[i+1];
EventQueuePool[SDL12_MAXEVENTS-1].next = NULL;
EventQueueHead = EventQueueTail = NULL;
EventQueueAvailable = EventQueuePool;
SDL_memset(EventStates, SDL_ENABLE, sizeof (EventStates)); /* on by default */
EventStates[SDL12_SYSWMEVENT] = SDL_IGNORE; /* off by default. */
SDL20_SetEventFilter(EventFilter20to12, NULL);
VideoDisplayIndex = GetVideoDisplay();
SwapInterval = 0;
if (Init12VidModes() == -1) {
return -1;
}
return 0;
}
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DECLSPEC int SDLCALL
SDL_InitSubSystem(Uint32 sdl12flags)
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{
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// !!! FIXME: there is never a parachute in SDL2, should we catch segfaults ourselves?
// !!! FIXME: support event thread where it makes sense to do so?
if ( (sdl12flags & SDL12_INIT_EVENTTHREAD) == SDL12_INIT_EVENTTHREAD ) {
return SDL20_SetError("OS doesn't support threaded events");
}
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Uint32 sdl20flags = 0;
int rc;
if (!LoadSDL20())
return -1;
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#define SETFLAG(flag) if (sdl12flags & SDL12_INIT_##flag) sdl20flags |= SDL_INIT_##flag
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SETFLAG(TIMER);
SETFLAG(AUDIO);
SETFLAG(VIDEO);
SETFLAG(JOYSTICK);
SETFLAG(NOPARACHUTE);
#undef SETFLAG
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// There's no CDROM in 2.0, but we'll just pretend it succeeded.
if (sdl12flags & SDL12_INIT_CDROM)
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CDRomInit = 1;
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// !!! FIXME: do something about SDL12_INIT_EVENTTHREAD
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rc = SDL20_Init(sdl20flags);
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if ((rc == 0) && (sdl20flags & SDL_INIT_VIDEO)) {
if (Init12Video() == -1) {
return -1; /* !!! FIXME: should we deinit other subsystems? */
}
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}
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return rc;
}
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DECLSPEC int SDLCALL
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SDL_Init(Uint32 sdl12flags)
{
648
return SDL_InitSubSystem(sdl12flags); /* there's no difference betwee Init and InitSubSystem in SDL2. */
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}
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static void
InitFlags12To20(const Uint32 flags12, Uint32 *_flags20, Uint32 *_extraflags)
654
{
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Uint32 flags20 = 0;
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Uint32 extraflags = 0;
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#define SETFLAG(flag) if (flags12 & SDL12_INIT_##flag) flags20 |= SDL_INIT_##flag
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SETFLAG(TIMER);
SETFLAG(AUDIO);
SETFLAG(VIDEO);
SETFLAG(JOYSTICK);
SETFLAG(NOPARACHUTE);
#undef SETFLAG
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if ((flags12 & SDL12_INIT_CDROM) && (CDRomInit)) {
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extraflags |= SDL12_INIT_CDROM;
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}
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// !!! FIXME: do something about SDL12_INIT_EVENTTHREAD
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*_flags20 = flags20;
*_extraflags = extraflags;
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}
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static Uint32
InitFlags20to12(const Uint32 flags20)
678
{
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Uint32 flags12 = 0;
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#define SETFLAG(flag) if (flags20 & SDL_INIT_##flag) flags12 |= SDL12_INIT_##flag
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SETFLAG(TIMER);
SETFLAG(AUDIO);
SETFLAG(VIDEO);
SETFLAG(JOYSTICK);
SETFLAG(NOPARACHUTE);
#undef SETFLAG
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return flags12;
}
DECLSPEC Uint32 SDLCALL
SDL_WasInit(Uint32 sdl12flags)
{
Uint32 sdl20flags, extraflags;
InitFlags12To20(sdl12flags, &sdl20flags, &extraflags);
return InitFlags20to12(SDL20_WasInit(sdl20flags)) | extraflags;
}
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static void
Quit12Video(void)
{
int i;
for (i = 0; i < VideoModesCount; i++) {
SDL20_free(VideoModes[i].modeslist);
SDL20_free(VideoModes[i].modes);
}
SDL20_free(VideoModes);
SDL20_FreeFormat(VideoInfo.vfmt);
SDL20_zero(VideoInfo);
EventFilter12 = NULL;
EventQueueAvailable = EventQueueHead = EventQueueTail = NULL;
CurrentCursor = NULL;
VideoModes = NULL;
VideoModesCount = 0;
}
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DECLSPEC void SDLCALL
SDL_QuitSubSystem(Uint32 sdl12flags)
{
Uint32 sdl20flags, extraflags;
InitFlags12To20(sdl12flags, &sdl20flags, &extraflags);
if (extraflags & SDL12_INIT_CDROM) {
730
CDRomInit = 0;
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}
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// !!! FIXME: reset a bunch of other global variables too.
if (sdl12flags & SDL12_INIT_VIDEO) {
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Quit12Video();
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}
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// !!! FIXME: do something about SDL12_INIT_EVENTTHREAD
SDL20_QuitSubSystem(sdl20flags);
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if ((SDL20_WasInit(0) == 0) && (!CDRomInit)) {
SDL20_Quit();
UnloadSDL20();
}
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}
747
DECLSPEC void SDLCALL
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SDL_Quit(void)
{
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SDL_QuitSubSystem(SDL_WasInit(0) | SDL12_INIT_CDROM);
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}
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DECLSPEC void SDLCALL
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SDL_SetError(const char *fmt, ...)
{
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char ch;
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char *str = NULL;
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size_t len = 0;
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va_list ap;
va_start(ap, fmt);
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len = SDL20_vsnprintf(&ch, 1, fmt, ap);
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va_end(ap);
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str = (char *) SDL20_malloc(len + 1);
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if (!str)
SDL20_OutOfMemory();
else
{
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va_start(ap, fmt);
SDL20_vsnprintf(str, len + 1, fmt, ap);
va_end(ap);
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SDL20_SetError("%s", str);
773
SDL20_free(str);
774
}
775
}
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DECLSPEC const char * SDLCALL
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781
SDL_GetError(void)
{
if (!Loaded_SDL20)
{
782
static const char noload_errstr[] = "Failed to load SDL 2.0 shared library";
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800
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802
return noload_errstr;
}
return SDL20_GetError();
}
static const char *
GetDriverName(const char *name, char *namebuf, int maxlen)
{
if (name) {
if (namebuf) {
SDL20_strlcpy(namebuf, name, maxlen);
return namebuf;
} else {
return name;
}
}
return NULL;
}
803
DECLSPEC const char * SDLCALL
804
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806
807
808
SDL_AudioDriverName(char *namebuf, int maxlen)
{
return GetDriverName(SDL20_GetCurrentAudioDriver(), namebuf, maxlen);
}
809
DECLSPEC const char * SDLCALL
810
811
812
813
814
SDL_VideoDriverName(char *namebuf, int maxlen)
{
return GetDriverName(SDL20_GetCurrentVideoDriver(), namebuf, maxlen);
}
815
DECLSPEC int SDLCALL
816
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820
821
822
823
824
825
826
827
828
829
830
831
832
SDL_PollEvent(SDL12_Event *event12)
{
EventQueueType *next;
SDL20_PumpEvents(); /* this will run our filter and build our 1.2 queue. */
if (EventQueueHead == NULL)
return 0; /* no events at the moment. */
SDL_memcpy(event12, &EventQueueHead->event12, sizeof (SDL12_Event));
next = EventQueueHead->next;
EventQueueHead->next = EventQueueAvailable;
EventQueueAvailable = EventQueueHead;
EventQueueHead = next;
return 1;
}
833
DECLSPEC int SDLCALL
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
SDL_PushEvent(SDL12_Event *event12)
{
EventQueueType *item = EventQueueAvailable;
if (item == NULL)
return -1; /* no space available at the moment. */
EventQueueAvailable = item->next;
if (EventQueueTail)
EventQueueTail->next = item;
else
EventQueueHead = EventQueueTail = item;
item->next = NULL;
SDL_memcpy(&item->event12, event12, sizeof (SDL12_Event));
return 0;
}
851
DECLSPEC int SDLCALL
852
853
854
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856
857
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861
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863
864
865
866
867
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869
870
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890
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899
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901
902
903
904
905
906
SDL_PeepEvents(SDL12_Event *events12, int numevents, SDL_eventaction action, Uint32 mask)
{
if (action == SDL_ADDEVENT)
{
int i;
for (i = 0; i < numevents; i++)
{
if (SDL_PushEvent(&events12[i]) == -1)
break; /* out of space for more events. */
}
return i;
}
else if ((action == SDL_PEEKEVENT) || (action == SDL_GETEVENT))
{
const SDL_bool isGet = (action == SDL_GETEVENT);
EventQueueType *prev = NULL;
EventQueueType *item = EventQueueHead;
EventQueueType *next = NULL;
int chosen = 0;
while (chosen < numevents)
{
EventQueueType *nextPrev = item;
if (!item)
break; /* no more events at the moment. */
next = item->next; /* copy, since we might overwrite item->next */
if (mask & (1<<item->event12.type))
{
SDL_memcpy(&events12[chosen++], &item->event12, sizeof (SDL12_Event));
if (isGet) /* remove from list? */
{
if (prev != NULL)
prev->next = next;
if (item == EventQueueHead)
EventQueueHead = next;
if (item == EventQueueTail)
EventQueueTail = prev;
/* put it back in the free pool. */
item->next = EventQueueAvailable;
EventQueueAvailable = item;
nextPrev = prev; /* previous item doesn't change. */
}
}
item = next;
prev = nextPrev;
}
return chosen;
}
return 0;
}
907
DECLSPEC int SDLCALL
908
909
910
911
912
913
914
915
SDL_WaitEvent(SDL12_Event *event12)
{
/* In 1.2, this only fails (-1) if you haven't SDL_Init()'d. */
while (!SDL_PollEvent(event12))
SDL_Delay(10);
return 1;
}
916
917
918
919
920
921
922
923
924
925
926
927
928
929
static SDL_bool
PushEventIfNotFiltered(SDL12_Event *event12)
{
if (event12->type != SDL12_NOEVENT)
{
if (EventStates[event12->type] != SDL_IGNORE)
{
if ((!EventFilter12) || (EventFilter12(event12)))
return (SDL_PushEvent(event12) == 0);
}
}
return SDL_FALSE;
}
930
DECLSPEC Uint8 SDLCALL
931
932
933
934
935
936
937
938
939
940
941
942
943
944
SDL_EventState(Uint8 type, int state)
{
/* the values of "state" match between 1.2 and 2.0 */
const Uint8 retval = EventStates[type];
SDL12_Event e;
if (state != SDL_QUERY)
EventStates[type] = state;
if (state == SDL_IGNORE) /* drop existing events of this type. */
while (SDL_PeepEvents(&e, 1, SDL_GETEVENT, (1<<type))) {}
return retval;
}
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
DECLSPEC Uint8 SDLCALL
SDL_GetMouseState(int *x, int *y)
{
const Uint32 state20 = SDL20_GetMouseState(x, y);
Uint8 retval = (state20 & 0x7); /* left, right, and middle will match. */
/* the X[12] buttons are different in 1.2; mousewheel was in the way. */
if (state20 & SDL_BUTTON(SDL_BUTTON_X1))
retval |= (1<<5);
if (state20 & SDL_BUTTON(SDL_BUTTON_X2))
retval |= (1<<6);
return retval;
}
960
961
static int
EventFilter20to12(void *data, SDL_Event *event20)
962
{
963
//const int maxUserEvents12 = SDL12_NUMEVENTS - SDL12_USEREVENT;
964
SDL12_Event event12;
965
int x, y;
966
967
968
SDL_assert(data == NULL); /* currently unused. */
969
SDL20_zero(event12);
970
971
972
973
switch (event20->type)
{
case SDL_QUIT:
974
event12.type = SDL12_QUIT;
975
976
977
978
979
980
break;
case SDL_WINDOWEVENT:
switch (event20->window.event)
{
case SDL_WINDOWEVENT_CLOSE:
981
event12.type = SDL12_QUIT;
982
983
984
985
break;
case SDL_WINDOWEVENT_SHOWN:
case SDL_WINDOWEVENT_EXPOSED:
986
event12.type = SDL12_VIDEOEXPOSE;
987
988
989
990
break;
case SDL_WINDOWEVENT_RESIZED:
case SDL_WINDOWEVENT_SIZE_CHANGED: // !!! FIXME: what's the difference between RESIZED and SIZE_CHANGED?
991
992
993
event12.type = SDL12_VIDEORESIZE;
event12.resize.w = event20->window.data1;
event12.resize.h = event20->window.data2;
994
995
996
break;
case SDL_WINDOWEVENT_MINIMIZED:
997
998
999
event12.type = SDL12_ACTIVEEVENT;
event12.active.gain = 0;
event12.active.state = SDL12_APPACTIVE;
1000
break;