src/video/SDL_video.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 04 Jan 2009 05:41:52 +0000
changeset 2984 0b160c970b7e
parent 2967 e4a469d6ddab
child 2999 b2025ca5d7a5
permissions -rw-r--r--
Fixed some dependency issues with SDL_revision.h
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2009 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Lesser General Public
     7     License as published by the Free Software Foundation; either
     8     version 2.1 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Lesser General Public License for more details.
    14 
    15     You should have received a copy of the GNU Lesser General Public
    16     License along with this library; if not, write to the Free Software
    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 #include "SDL_config.h"
    23 
    24 /* The high-level video driver subsystem */
    25 
    26 #include "SDL_video.h"
    27 #include "SDL_sysvideo.h"
    28 #include "SDL_blit.h"
    29 #include "SDL_pixels_c.h"
    30 #include "SDL_renderer_gl.h"
    31 #include "SDL_renderer_gles.h"
    32 #include "SDL_renderer_sw.h"
    33 #include "../events/SDL_sysevents.h"
    34 #include "../events/SDL_events_c.h"
    35 
    36 #if SDL_VIDEO_OPENGL_ES
    37 #include "SDL_opengles.h"
    38 #endif /* SDL_VIDEO_OPENGL_ES */
    39 
    40 #if SDL_VIDEO_OPENGL
    41 #include "SDL_opengl.h"
    42 
    43 /* On Windows, windows.h defines CreateWindow */
    44 #ifdef CreateWindow
    45 #undef CreateWindow
    46 #endif
    47 #endif /* SDL_VIDEO_OPENGL */
    48 
    49 /* Available video drivers */
    50 static VideoBootStrap *bootstrap[] = {
    51 #if SDL_VIDEO_DRIVER_COCOA
    52     &COCOA_bootstrap,
    53 #endif
    54 #if SDL_VIDEO_DRIVER_X11
    55     &X11_bootstrap,
    56 #endif
    57 #if SDL_VIDEO_DRIVER_NANOX
    58     &NX_bootstrap,
    59 #endif
    60 #if SDL_VIDEO_DRIVER_IPOD
    61     &iPod_bootstrap,
    62 #endif
    63 #if SDL_VIDEO_DRIVER_WSCONS
    64     &WSCONS_bootstrap,
    65 #endif
    66 #if SDL_VIDEO_DRIVER_FBCON
    67     &FBCON_bootstrap,
    68 #endif
    69 #if SDL_VIDEO_DRIVER_DIRECTFB
    70     &DirectFB_bootstrap,
    71 #endif
    72 #if SDL_VIDEO_DRIVER_PS2GS
    73     &PS2GS_bootstrap,
    74 #endif
    75 #if SDL_VIDEO_DRIVER_VGL
    76     &VGL_bootstrap,
    77 #endif
    78 #if SDL_VIDEO_DRIVER_SVGALIB
    79     &SVGALIB_bootstrap,
    80 #endif
    81 #if SDL_VIDEO_DRIVER_GAPI
    82     &GAPI_bootstrap,
    83 #endif
    84 #if SDL_VIDEO_DRIVER_WIN32
    85     &WIN32_bootstrap,
    86 #endif
    87 #if SDL_VIDEO_DRIVER_BWINDOW
    88     &BWINDOW_bootstrap,
    89 #endif
    90 #if SDL_VIDEO_DRIVER_PHOTON
    91     &ph_bootstrap,
    92 #endif
    93 #if SDL_VIDEO_DRIVER_EPOC
    94     &EPOC_bootstrap,
    95 #endif
    96 #if SDL_VIDEO_DRIVER_XBIOS
    97     &XBIOS_bootstrap,
    98 #endif
    99 #if SDL_VIDEO_DRIVER_GEM
   100     &GEM_bootstrap,
   101 #endif
   102 #if SDL_VIDEO_DRIVER_DC
   103     &DC_bootstrap,
   104 #endif
   105 #if SDL_VIDEO_DRIVER_RISCOS
   106     &RISCOS_bootstrap,
   107 #endif
   108 #if SDL_VIDEO_DRIVER_OS2FS
   109     &OS2FSLib_bootstrap,
   110 #endif
   111 #if SDL_VIDEO_DRIVER_NDS
   112     &NDS_bootstrap,
   113 #endif
   114 #if SDL_VIDEO_DRIVER_UIKIT
   115     &UIKIT_bootstrap,
   116 #endif
   117 #if SDL_VIDEO_DRIVER_DUMMY
   118     &DUMMY_bootstrap,
   119 #endif
   120     NULL
   121 };
   122 
   123 static SDL_VideoDevice *_this = NULL;
   124 
   125 /* Various local functions */
   126 static void SDL_UpdateWindowGrab(SDL_Window * window);
   127 
   128 static int
   129 cmpmodes(const void *A, const void *B)
   130 {
   131     SDL_DisplayMode a = *(const SDL_DisplayMode *) A;
   132     SDL_DisplayMode b = *(const SDL_DisplayMode *) B;
   133 
   134     if (a.w != b.w) {
   135         return b.w - a.w;
   136     }
   137     if (a.h != b.h) {
   138         return b.h - a.h;
   139     }
   140     if (SDL_BITSPERPIXEL(a.format) != SDL_BITSPERPIXEL(b.format)) {
   141         return SDL_BITSPERPIXEL(b.format) - SDL_BITSPERPIXEL(a.format);
   142     }
   143     if (a.refresh_rate != b.refresh_rate) {
   144         return b.refresh_rate - a.refresh_rate;
   145     }
   146     return 0;
   147 }
   148 
   149 static void
   150 SDL_UninitializedVideo()
   151 {
   152     SDL_SetError("Video subsystem has not been initialized");
   153 }
   154 
   155 int
   156 SDL_GetNumVideoDrivers(void)
   157 {
   158     return SDL_arraysize(bootstrap) - 1;
   159 }
   160 
   161 const char *
   162 SDL_GetVideoDriver(int index)
   163 {
   164     if (index >= 0 && index < SDL_GetNumVideoDrivers()) {
   165         return bootstrap[index]->name;
   166     }
   167     return NULL;
   168 }
   169 
   170 /*
   171  * Initialize the video and event subsystems -- determine native pixel format
   172  */
   173 int
   174 SDL_VideoInit(const char *driver_name, Uint32 flags)
   175 {
   176     SDL_VideoDevice *video;
   177     int index;
   178     int i;
   179 
   180     /* Toggle the event thread flags, based on OS requirements */
   181 #if defined(MUST_THREAD_EVENTS)
   182     flags |= SDL_INIT_EVENTTHREAD;
   183 #elif defined(CANT_THREAD_EVENTS)
   184     if ((flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD) {
   185         SDL_SetError("OS doesn't support threaded events");
   186         return -1;
   187     }
   188 #endif
   189 
   190     /* Start the event loop */
   191     if (SDL_StartEventLoop(flags) < 0) {
   192         return -1;
   193     }
   194     /* Check to make sure we don't overwrite '_this' */
   195     if (_this != NULL) {
   196         SDL_VideoQuit();
   197     }
   198     /* Select the proper video driver */
   199     index = 0;
   200     video = NULL;
   201     if (driver_name == NULL) {
   202         driver_name = SDL_getenv("SDL_VIDEODRIVER");
   203     }
   204     if (driver_name != NULL) {
   205         for (i = 0; bootstrap[i]; ++i) {
   206             if (SDL_strcasecmp(bootstrap[i]->name, driver_name) == 0) {
   207                 if (bootstrap[i]->available()) {
   208                     video = bootstrap[i]->create(index);
   209                 }
   210                 break;
   211             }
   212         }
   213     } else {
   214         for (i = 0; bootstrap[i]; ++i) {
   215             if (bootstrap[i]->available()) {
   216                 video = bootstrap[i]->create(index);
   217                 if (video != NULL) {
   218                     break;
   219                 }
   220             }
   221         }
   222     }
   223     if (video == NULL) {
   224         if (driver_name) {
   225             SDL_SetError("%s not available", driver_name);
   226         } else {
   227             SDL_SetError("No available video device");
   228         }
   229         return -1;
   230     }
   231     _this = video;
   232     _this->name = bootstrap[i]->name;
   233     _this->next_object_id = 1;
   234 
   235 
   236     /* Set some very sane GL defaults */
   237     _this->gl_config.driver_loaded = 0;
   238     _this->gl_config.dll_handle = NULL;
   239     _this->gl_config.red_size = 3;
   240     _this->gl_config.green_size = 3;
   241     _this->gl_config.blue_size = 2;
   242     _this->gl_config.alpha_size = 0;
   243     _this->gl_config.buffer_size = 0;
   244     _this->gl_config.depth_size = 16;
   245     _this->gl_config.stencil_size = 0;
   246     _this->gl_config.double_buffer = 1;
   247     _this->gl_config.accum_red_size = 0;
   248     _this->gl_config.accum_green_size = 0;
   249     _this->gl_config.accum_blue_size = 0;
   250     _this->gl_config.accum_alpha_size = 0;
   251     _this->gl_config.stereo = 0;
   252     _this->gl_config.multisamplebuffers = 0;
   253     _this->gl_config.multisamplesamples = 0;
   254     _this->gl_config.retained_backing = 1;
   255     _this->gl_config.accelerated = -1;  /* not known, don't set */
   256 
   257     /* Initialize the video subsystem */
   258     if (_this->VideoInit(_this) < 0) {
   259         SDL_VideoQuit();
   260         return -1;
   261     }
   262     /* Make sure some displays were added */
   263     if (_this->num_displays == 0) {
   264         SDL_SetError("The video driver did not add any displays");
   265         SDL_VideoQuit();
   266         return (-1);
   267     }
   268     /* The software renderer is always available */
   269     for (i = 0; i < _this->num_displays; ++i) {
   270 #if SDL_VIDEO_RENDER_OGL
   271         SDL_AddRenderDriver(i, &GL_RenderDriver);
   272 #endif
   273 
   274 #if SDL_VIDEO_RENDER_OGL_ES
   275         SDL_AddRenderDriver(i, &GL_ES_RenderDriver);
   276 #endif
   277         if (_this->displays[i].num_render_drivers > 0) {
   278             SDL_AddRenderDriver(i, &SW_RenderDriver);
   279         }
   280     }
   281 
   282     /* We're ready to go! */
   283     return 0;
   284 }
   285 
   286 const char *
   287 SDL_GetCurrentVideoDriver()
   288 {
   289     if (!_this) {
   290         SDL_UninitializedVideo();
   291         return NULL;
   292     }
   293     return _this->name;
   294 }
   295 
   296 SDL_VideoDevice *
   297 SDL_GetVideoDevice()
   298 {
   299     return _this;
   300 }
   301 
   302 int
   303 SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode)
   304 {
   305     SDL_VideoDisplay display;
   306 
   307     SDL_zero(display);
   308     if (desktop_mode) {
   309         display.desktop_mode = *desktop_mode;
   310     }
   311     display.current_mode = display.desktop_mode;
   312 
   313     return SDL_AddVideoDisplay(&display);
   314 }
   315 
   316 int
   317 SDL_AddVideoDisplay(const SDL_VideoDisplay * display)
   318 {
   319     SDL_VideoDisplay *displays;
   320     int index = -1;
   321 
   322     displays =
   323         SDL_realloc(_this->displays,
   324                     (_this->num_displays + 1) * sizeof(*displays));
   325     if (displays) {
   326         index = _this->num_displays++;
   327         displays[index] = *display;
   328         displays[index].device = _this;
   329         _this->displays = displays;
   330     } else {
   331         SDL_OutOfMemory();
   332     }
   333     return index;
   334 }
   335 
   336 int
   337 SDL_GetNumVideoDisplays(void)
   338 {
   339     if (!_this) {
   340         SDL_UninitializedVideo();
   341         return 0;
   342     }
   343     return _this->num_displays;
   344 }
   345 
   346 int
   347 SDL_SelectVideoDisplay(int index)
   348 {
   349     if (!_this) {
   350         SDL_UninitializedVideo();
   351         return (-1);
   352     }
   353     if (index < 0 || index >= _this->num_displays) {
   354         SDL_SetError("index must be in the range 0 - %d",
   355                      _this->num_displays - 1);
   356         return -1;
   357     }
   358     _this->current_display = index;
   359     return 0;
   360 }
   361 
   362 int
   363 SDL_GetCurrentVideoDisplay(void)
   364 {
   365     if (!_this) {
   366         SDL_UninitializedVideo();
   367         return (-1);
   368     }
   369     return _this->current_display;
   370 }
   371 
   372 SDL_bool
   373 SDL_AddDisplayMode(int displayIndex, const SDL_DisplayMode * mode)
   374 {
   375     SDL_VideoDisplay *display = &_this->displays[displayIndex];
   376     SDL_DisplayMode *modes;
   377     int i, nmodes;
   378 
   379     /* Make sure we don't already have the mode in the list */
   380     modes = display->display_modes;
   381     nmodes = display->num_display_modes;
   382     for (i = nmodes; i--;) {
   383         if (SDL_memcmp(mode, &modes[i], sizeof(*mode)) == 0) {
   384             return SDL_FALSE;
   385         }
   386     }
   387 
   388     /* Go ahead and add the new mode */
   389     if (nmodes == display->max_display_modes) {
   390         modes =
   391             SDL_realloc(modes,
   392                         (display->max_display_modes + 32) * sizeof(*modes));
   393         if (!modes) {
   394             return SDL_FALSE;
   395         }
   396         display->display_modes = modes;
   397         display->max_display_modes += 32;
   398     }
   399     modes[nmodes] = *mode;
   400     display->num_display_modes++;
   401 
   402     return SDL_TRUE;
   403 }
   404 
   405 int
   406 SDL_GetNumDisplayModes()
   407 {
   408     if (_this) {
   409         SDL_VideoDisplay *display = &SDL_CurrentDisplay;
   410         if (!display->num_display_modes && _this->GetDisplayModes) {
   411             _this->GetDisplayModes(_this);
   412             SDL_qsort(display->display_modes, display->num_display_modes,
   413                       sizeof(SDL_DisplayMode), cmpmodes);
   414         }
   415         return display->num_display_modes;
   416     }
   417     return 0;
   418 }
   419 
   420 int
   421 SDL_GetDisplayMode(int index, SDL_DisplayMode * mode)
   422 {
   423     if (index < 0 || index >= SDL_GetNumDisplayModes()) {
   424         SDL_SetError("index must be in the range of 0 - %d",
   425                      SDL_GetNumDisplayModes() - 1);
   426         return -1;
   427     }
   428     if (mode) {
   429         *mode = SDL_CurrentDisplay.display_modes[index];
   430     }
   431     return 0;
   432 }
   433 
   434 int
   435 SDL_GetDesktopDisplayMode(SDL_DisplayMode * mode)
   436 {
   437     if (!_this) {
   438         SDL_UninitializedVideo();
   439         return -1;
   440     }
   441     if (mode) {
   442         *mode = SDL_CurrentDisplay.desktop_mode;
   443     }
   444     return 0;
   445 }
   446 
   447 int
   448 SDL_GetCurrentDisplayMode(SDL_DisplayMode * mode)
   449 {
   450     if (!_this) {
   451         SDL_UninitializedVideo();
   452         return -1;
   453     }
   454     if (mode) {
   455         *mode = SDL_CurrentDisplay.current_mode;
   456     }
   457     return 0;
   458 }
   459 
   460 SDL_DisplayMode *
   461 SDL_GetClosestDisplayMode(const SDL_DisplayMode * mode,
   462                           SDL_DisplayMode * closest)
   463 {
   464     Uint32 target_format;
   465     int target_refresh_rate;
   466     int i;
   467     SDL_DisplayMode *current, *match;
   468 
   469     if (!_this || !mode || !closest) {
   470         return NULL;
   471     }
   472     /* Default to the desktop format */
   473     if (mode->format) {
   474         target_format = mode->format;
   475     } else {
   476         target_format = SDL_CurrentDisplay.desktop_mode.format;
   477     }
   478 
   479     /* Default to the desktop refresh rate */
   480     if (mode->refresh_rate) {
   481         target_refresh_rate = mode->refresh_rate;
   482     } else {
   483         target_refresh_rate = SDL_CurrentDisplay.desktop_mode.refresh_rate;
   484     }
   485 
   486     match = NULL;
   487     for (i = 0; i < SDL_GetNumDisplayModes(); ++i) {
   488         current = &SDL_CurrentDisplay.display_modes[i];
   489 
   490         if (current->w && (current->w < mode->w)) {
   491             /* Out of sorted modes large enough here */
   492             break;
   493         }
   494         if (current->h && (current->h < mode->h)) {
   495             if (current->w && (current->w == mode->w)) {
   496                 /* Out of sorted modes large enough here */
   497                 break;
   498             }
   499             /* Wider, but not tall enough, due to a different
   500                aspect ratio. This mode must be skipped, but closer
   501                modes may still follow. */
   502             continue;
   503         }
   504         if (!match || current->w < match->w || current->h < match->h) {
   505             match = current;
   506             continue;
   507         }
   508         if (current->format != match->format) {
   509             /* Sorted highest depth to lowest */
   510             if (current->format == target_format ||
   511                 (SDL_BITSPERPIXEL(current->format) >=
   512                  SDL_BITSPERPIXEL(target_format)
   513                  && SDL_PIXELTYPE(current->format) ==
   514                  SDL_PIXELTYPE(target_format))) {
   515                 match = current;
   516             }
   517             continue;
   518         }
   519         if (current->refresh_rate != match->refresh_rate) {
   520             /* Sorted highest refresh to lowest */
   521             if (current->refresh_rate >= target_refresh_rate) {
   522                 match = current;
   523             }
   524         }
   525     }
   526     if (match) {
   527         if (match->format) {
   528             closest->format = match->format;
   529         } else {
   530             closest->format = mode->format;
   531         }
   532         if (match->w && match->h) {
   533             closest->w = match->w;
   534             closest->h = match->h;
   535         } else {
   536             closest->w = mode->w;
   537             closest->h = mode->h;
   538         }
   539         if (match->refresh_rate) {
   540             closest->refresh_rate = match->refresh_rate;
   541         } else {
   542             closest->refresh_rate = mode->refresh_rate;
   543         }
   544         closest->driverdata = match->driverdata;
   545 
   546         /*
   547          * Pick some reasonable defaults if the app and driver don't
   548          * care
   549          */
   550         if (!closest->format) {
   551             closest->format = SDL_PIXELFORMAT_RGB888;
   552         }
   553         if (!closest->w) {
   554             closest->w = 640;
   555         }
   556         if (!closest->h) {
   557             closest->h = 480;
   558         }
   559         return closest;
   560     }
   561     return NULL;
   562 }
   563 
   564 int
   565 SDL_SetDisplayMode(const SDL_DisplayMode * mode)
   566 {
   567     SDL_VideoDisplay *display;
   568     SDL_DisplayMode display_mode;
   569     SDL_DisplayMode current_mode;
   570     int i, ncolors;
   571 
   572     if (!_this) {
   573         SDL_UninitializedVideo();
   574         return -1;
   575     }
   576     display = &SDL_CurrentDisplay;
   577     if (!mode) {
   578         mode = &display->desktop_mode;
   579     }
   580     display_mode = *mode;
   581 
   582     /* Default to the current mode */
   583     if (!display_mode.format) {
   584         display_mode.format = display->current_mode.format;
   585     }
   586     if (!display_mode.w) {
   587         display_mode.w = display->current_mode.w;
   588     }
   589     if (!display_mode.h) {
   590         display_mode.h = display->current_mode.h;
   591     }
   592     if (!display_mode.refresh_rate) {
   593         display_mode.refresh_rate = display->current_mode.refresh_rate;
   594     }
   595     /* Get a good video mode, the closest one possible */
   596     if (!SDL_GetClosestDisplayMode(&display_mode, &display_mode)) {
   597         SDL_SetError("No video mode large enough for %dx%d",
   598                      display_mode.w, display_mode.h);
   599         return -1;
   600     }
   601     /* See if there's anything left to do */
   602     SDL_GetCurrentDisplayMode(&current_mode);
   603     if (SDL_memcmp(&display_mode, &current_mode, sizeof(display_mode)) == 0) {
   604         return 0;
   605     }
   606     /* Actually change the display mode */
   607     if (_this->SetDisplayMode(_this, &display_mode) < 0) {
   608         return -1;
   609     }
   610     display->current_mode = display_mode;
   611 
   612     /* Set up a palette, if necessary */
   613     if (SDL_ISPIXELFORMAT_INDEXED(display_mode.format)) {
   614         ncolors = (1 << SDL_BITSPERPIXEL(display_mode.format));
   615     } else {
   616         ncolors = 0;
   617     }
   618     if ((!ncolors && display->palette) || (ncolors && !display->palette)
   619         || (ncolors && ncolors != display->palette->ncolors)) {
   620         if (display->palette) {
   621             SDL_FreePalette(display->palette);
   622             display->palette = NULL;
   623         }
   624         if (ncolors) {
   625             display->palette = SDL_AllocPalette(ncolors);
   626             if (!display->palette) {
   627                 return -1;
   628             }
   629             SDL_DitherColors(display->palette->colors,
   630                              SDL_BITSPERPIXEL(display_mode.format));
   631         }
   632     }
   633     /* Move any fullscreen windows into position */
   634     for (i = 0; i < display->num_windows; ++i) {
   635         SDL_Window *window = &display->windows[i];
   636         if (FULLSCREEN_VISIBLE(window)) {
   637             SDL_SetWindowPosition(window->id, window->x, window->y);
   638         }
   639     }
   640 
   641     return 0;
   642 }
   643 
   644 int
   645 SDL_SetFullscreenDisplayMode(const SDL_DisplayMode * mode)
   646 {
   647     SDL_VideoDisplay *display;
   648     SDL_DisplayMode fullscreen_mode;
   649     int i;
   650 
   651     if (!_this) {
   652         SDL_UninitializedVideo();
   653         return -1;
   654     }
   655     display = &SDL_CurrentDisplay;
   656     if (!mode) {
   657         mode = &display->desktop_mode;
   658     }
   659     if (!SDL_GetClosestDisplayMode(mode, &fullscreen_mode)) {
   660         SDL_SetError("Couldn't find display mode match");
   661         return -1;
   662     }
   663     if (SDL_memcmp
   664         (&fullscreen_mode, &display->fullscreen_mode,
   665          sizeof(fullscreen_mode)) == 0) {
   666         /* Nothing to do... */
   667         return 0;
   668     }
   669     display->fullscreen_mode = fullscreen_mode;
   670 
   671     /* Actually set the mode if we have a fullscreen window visible */
   672     for (i = 0; i < display->num_windows; ++i) {
   673         SDL_Window *window = &display->windows[i];
   674         if (FULLSCREEN_VISIBLE(window)) {
   675             if (SDL_SetDisplayMode(&display->fullscreen_mode) < 0) {
   676                 return -1;
   677             }
   678         }
   679         if (window->flags & SDL_WINDOW_FULLSCREEN) {
   680             SDL_OnWindowResized(window);
   681         }
   682     }
   683     return 0;
   684 }
   685 
   686 int
   687 SDL_GetFullscreenDisplayMode(SDL_DisplayMode * mode)
   688 {
   689     if (!_this) {
   690         SDL_UninitializedVideo();
   691         return -1;
   692     }
   693     if (mode) {
   694         *mode = SDL_CurrentDisplay.fullscreen_mode;
   695     }
   696     return 0;
   697 }
   698 
   699 int
   700 SDL_SetDisplayPalette(const SDL_Color * colors, int firstcolor, int ncolors)
   701 {
   702     SDL_Palette *palette;
   703     int status = 0;
   704 
   705     if (!_this) {
   706         SDL_UninitializedVideo();
   707         return -1;
   708     }
   709     palette = SDL_CurrentDisplay.palette;
   710     if (!palette) {
   711         SDL_SetError("Display mode does not have a palette");
   712         return -1;
   713     }
   714     status = SDL_SetPaletteColors(palette, colors, firstcolor, ncolors);
   715 
   716     if (_this->SetDisplayPalette) {
   717         if (_this->SetDisplayPalette(_this, palette) < 0) {
   718             status = -1;
   719         }
   720     }
   721     return status;
   722 }
   723 
   724 int
   725 SDL_GetDisplayPalette(SDL_Color * colors, int firstcolor, int ncolors)
   726 {
   727     SDL_Palette *palette;
   728 
   729     if (!_this) {
   730         SDL_UninitializedVideo();
   731         return -1;
   732     }
   733     palette = SDL_CurrentDisplay.palette;
   734     if (!palette->ncolors) {
   735         SDL_SetError("Display mode does not have a palette");
   736         return -1;
   737     }
   738     if (firstcolor < 0 || (firstcolor + ncolors) > palette->ncolors) {
   739         SDL_SetError("Palette indices are out of range");
   740         return -1;
   741     }
   742     SDL_memcpy(colors, &palette->colors[firstcolor],
   743                ncolors * sizeof(*colors));
   744     return 0;
   745 }
   746 
   747 SDL_WindowID
   748 SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)
   749 {
   750     const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
   751                                   SDL_WINDOW_OPENGL |
   752                                   SDL_WINDOW_BORDERLESS |
   753                                   SDL_WINDOW_RESIZABLE |
   754                                   SDL_WINDOW_INPUT_GRABBED);
   755     SDL_VideoDisplay *display;
   756     SDL_Window window;
   757     int num_windows;
   758     SDL_Window *windows;
   759 
   760     if (!_this) {
   761         SDL_UninitializedVideo();
   762         return 0;
   763     }
   764     if ((flags & SDL_WINDOW_OPENGL) && !_this->GL_CreateContext) {
   765         SDL_SetError("No OpenGL support in video driver");
   766         return 0;
   767     }
   768     SDL_zero(window);
   769     window.id = _this->next_object_id++;
   770     window.x = x;
   771     window.y = y;
   772     window.w = w;
   773     window.h = h;
   774     window.flags = (flags & allowed_flags);
   775     window.display = _this->current_display;
   776 
   777     if (_this->CreateWindow && _this->CreateWindow(_this, &window) < 0) {
   778         return 0;
   779     }
   780     display = &SDL_CurrentDisplay;
   781     num_windows = display->num_windows;
   782     windows =
   783         SDL_realloc(display->windows, (num_windows + 1) * sizeof(*windows));
   784     if (!windows) {
   785         if (_this->DestroyWindow) {
   786             _this->DestroyWindow(_this, &window);
   787         }
   788         return 0;
   789     }
   790     windows[num_windows] = window;
   791     display->windows = windows;
   792     display->num_windows++;
   793 
   794     if (title) {
   795         SDL_SetWindowTitle(window.id, title);
   796     }
   797     if (flags & SDL_WINDOW_MAXIMIZED) {
   798         SDL_MaximizeWindow(window.id);
   799     }
   800     if (flags & SDL_WINDOW_MINIMIZED) {
   801         SDL_MinimizeWindow(window.id);
   802     }
   803     if (flags & SDL_WINDOW_SHOWN) {
   804         SDL_ShowWindow(window.id);
   805     }
   806     SDL_UpdateWindowGrab(&window);
   807 
   808     return window.id;
   809 }
   810 
   811 SDL_WindowID
   812 SDL_CreateWindowFrom(const void *data)
   813 {
   814     SDL_VideoDisplay *display;
   815     SDL_Window window;
   816     int num_windows;
   817     SDL_Window *windows;
   818 
   819     if (!_this) {
   820         SDL_UninitializedVideo();
   821         return (0);
   822     }
   823     SDL_zero(window);
   824     window.id = _this->next_object_id++;
   825     window.display = _this->current_display;
   826 
   827     if (!_this->CreateWindowFrom ||
   828         _this->CreateWindowFrom(_this, &window, data) < 0) {
   829         return 0;
   830     }
   831     display = &SDL_CurrentDisplay;
   832     num_windows = display->num_windows;
   833     windows =
   834         SDL_realloc(display->windows, (num_windows + 1) * sizeof(*windows));
   835     if (!windows) {
   836         if (_this->DestroyWindow) {
   837             _this->DestroyWindow(_this, &window);
   838         }
   839         if (window.title) {
   840             SDL_free(window.title);
   841         }
   842         return 0;
   843     }
   844     windows[num_windows] = window;
   845     display->windows = windows;
   846     display->num_windows++;
   847 
   848     return window.id;
   849 }
   850 
   851 int
   852 SDL_RecreateWindow(SDL_Window * window, Uint32 flags)
   853 {
   854     char *title = window->title;
   855 
   856     if ((flags & SDL_WINDOW_OPENGL) && !_this->GL_CreateContext) {
   857         SDL_SetError("No OpenGL support in video driver");
   858         return -1;
   859     }
   860     if (_this->DestroyWindow) {
   861         _this->DestroyWindow(_this, window);
   862     }
   863     window->title = NULL;
   864     window->flags =
   865         (flags &
   866          ~(SDL_WINDOW_MAXIMIZED | SDL_WINDOW_MINIMIZED | SDL_WINDOW_SHOWN |
   867            SDL_WINDOW_INPUT_GRABBED));
   868 
   869     if (_this->CreateWindow && _this->CreateWindow(_this, window) < 0) {
   870         return -1;
   871     }
   872     if (title) {
   873         SDL_SetWindowTitle(window->id, title);
   874         SDL_free(title);
   875     }
   876     if (flags & SDL_WINDOW_MAXIMIZED) {
   877         SDL_MaximizeWindow(window->id);
   878     }
   879     if (flags & SDL_WINDOW_MINIMIZED) {
   880         SDL_MinimizeWindow(window->id);
   881     }
   882     if (flags & SDL_WINDOW_SHOWN) {
   883         SDL_ShowWindow(window->id);
   884     }
   885     SDL_UpdateWindowGrab(window);
   886 
   887     return 0;
   888 }
   889 
   890 SDL_Window *
   891 SDL_GetWindowFromID(SDL_WindowID windowID)
   892 {
   893     int i, j;
   894 
   895     if (!_this) {
   896         SDL_UninitializedVideo();
   897         return NULL;
   898     }
   899     for (i = 0; i < _this->num_displays; ++i) {
   900         SDL_VideoDisplay *display = &_this->displays[i];
   901         for (j = 0; j < display->num_windows; ++j) {
   902             SDL_Window *window = &display->windows[j];
   903             if (window->id == windowID) {
   904                 return window;
   905             }
   906         }
   907     }
   908     return NULL;
   909 }
   910 
   911 SDL_VideoDisplay *
   912 SDL_GetDisplayFromWindow(SDL_Window * window)
   913 {
   914     if (!_this) {
   915         SDL_UninitializedVideo();
   916         return NULL;
   917     }
   918     if (!window) {
   919         return NULL;
   920     }
   921     return &_this->displays[window->display];
   922 }
   923 
   924 Uint32
   925 SDL_GetWindowFlags(SDL_WindowID windowID)
   926 {
   927     SDL_Window *window = SDL_GetWindowFromID(windowID);
   928 
   929     if (!window) {
   930         return 0;
   931     }
   932     return window->flags;
   933 }
   934 
   935 void
   936 SDL_SetWindowTitle(SDL_WindowID windowID, const char *title)
   937 {
   938     SDL_Window *window = SDL_GetWindowFromID(windowID);
   939 
   940     if (!window || title == window->title) {
   941         return;
   942     }
   943     if (window->title) {
   944         SDL_free(window->title);
   945     }
   946     if (title) {
   947         window->title = SDL_strdup(title);
   948     } else {
   949         window->title = NULL;
   950     }
   951 
   952     if (_this->SetWindowTitle) {
   953         _this->SetWindowTitle(_this, window);
   954     }
   955 }
   956 
   957 const char *
   958 SDL_GetWindowTitle(SDL_WindowID windowID)
   959 {
   960     SDL_Window *window = SDL_GetWindowFromID(windowID);
   961 
   962     if (!window) {
   963         return NULL;
   964     }
   965     return window->title;
   966 }
   967 
   968 void
   969 SDL_SetWindowIcon(SDL_WindowID windowID, SDL_Surface * icon)
   970 {
   971     SDL_Window *window = SDL_GetWindowFromID(windowID);
   972 
   973     if (!window) {
   974         return;
   975     }
   976     if (_this->SetWindowIcon) {
   977         _this->SetWindowIcon(_this, window, icon);
   978     }
   979 }
   980 
   981 void
   982 SDL_SetWindowData(SDL_WindowID windowID, void *userdata)
   983 {
   984     SDL_Window *window = SDL_GetWindowFromID(windowID);
   985 
   986     if (!window) {
   987         return;
   988     }
   989     window->userdata = userdata;
   990 }
   991 
   992 void *
   993 SDL_GetWindowData(SDL_WindowID windowID)
   994 {
   995     SDL_Window *window = SDL_GetWindowFromID(windowID);
   996 
   997     if (!window) {
   998         return NULL;
   999     }
  1000     return window->userdata;
  1001 }
  1002 
  1003 void
  1004 SDL_SetWindowPosition(SDL_WindowID windowID, int x, int y)
  1005 {
  1006     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1007     SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
  1008 
  1009     if (!window) {
  1010         return;
  1011     }
  1012     if (x != SDL_WINDOWPOS_UNDEFINED) {
  1013         window->x = x;
  1014     }
  1015     if (y != SDL_WINDOWPOS_UNDEFINED) {
  1016         window->y = y;
  1017     }
  1018     if (_this->SetWindowPosition) {
  1019         _this->SetWindowPosition(_this, window);
  1020     }
  1021     SDL_SendWindowEvent(window->id, SDL_WINDOWEVENT_MOVED, x, y);
  1022 }
  1023 
  1024 void
  1025 SDL_GetWindowPosition(SDL_WindowID windowID, int *x, int *y)
  1026 {
  1027     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1028 
  1029     if (!window) {
  1030         return;
  1031     }
  1032     if (x) {
  1033         *x = window->x;
  1034     }
  1035     if (y) {
  1036         *y = window->y;
  1037     }
  1038 }
  1039 
  1040 void
  1041 SDL_SetWindowSize(SDL_WindowID windowID, int w, int h)
  1042 {
  1043     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1044 
  1045     if (!window) {
  1046         return;
  1047     }
  1048     window->w = w;
  1049     window->h = h;
  1050 
  1051     if (_this->SetWindowSize) {
  1052         _this->SetWindowSize(_this, window);
  1053     }
  1054     SDL_OnWindowResized(window);
  1055 }
  1056 
  1057 void
  1058 SDL_GetWindowSize(SDL_WindowID windowID, int *w, int *h)
  1059 {
  1060     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1061 
  1062     if (window) {
  1063         if (w) {
  1064             *w = window->w;
  1065         }
  1066         if (h) {
  1067             *h = window->h;
  1068         }
  1069     } else {
  1070         if (w) {
  1071             *w = 0;
  1072         }
  1073         if (h) {
  1074             *h = 0;
  1075         }
  1076     }
  1077 }
  1078 
  1079 void
  1080 SDL_ShowWindow(SDL_WindowID windowID)
  1081 {
  1082     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1083 
  1084     if (!window || (window->flags & SDL_WINDOW_SHOWN)) {
  1085         return;
  1086     }
  1087 
  1088     if (_this->ShowWindow) {
  1089         _this->ShowWindow(_this, window);
  1090     }
  1091     SDL_SendWindowEvent(window->id, SDL_WINDOWEVENT_SHOWN, 0, 0);
  1092 }
  1093 
  1094 void
  1095 SDL_HideWindow(SDL_WindowID windowID)
  1096 {
  1097     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1098 
  1099     if (!window || !(window->flags & SDL_WINDOW_SHOWN)) {
  1100         return;
  1101     }
  1102 
  1103     if (_this->HideWindow) {
  1104         _this->HideWindow(_this, window);
  1105     }
  1106     SDL_SendWindowEvent(window->id, SDL_WINDOWEVENT_HIDDEN, 0, 0);
  1107 }
  1108 
  1109 void
  1110 SDL_RaiseWindow(SDL_WindowID windowID)
  1111 {
  1112     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1113 
  1114     if (!window || !(window->flags & SDL_WINDOW_SHOWN)) {
  1115         return;
  1116     }
  1117     if (_this->RaiseWindow) {
  1118         _this->RaiseWindow(_this, window);
  1119     }
  1120 }
  1121 
  1122 void
  1123 SDL_MaximizeWindow(SDL_WindowID windowID)
  1124 {
  1125     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1126 
  1127     if (!window || (window->flags & SDL_WINDOW_MAXIMIZED)) {
  1128         return;
  1129     }
  1130 
  1131     if (_this->MaximizeWindow) {
  1132         _this->MaximizeWindow(_this, window);
  1133     }
  1134     SDL_SendWindowEvent(window->id, SDL_WINDOWEVENT_MAXIMIZED, 0, 0);
  1135 }
  1136 
  1137 void
  1138 SDL_MinimizeWindow(SDL_WindowID windowID)
  1139 {
  1140     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1141 
  1142     if (!window || (window->flags & SDL_WINDOW_MINIMIZED)) {
  1143         return;
  1144     }
  1145 
  1146     if (_this->MinimizeWindow) {
  1147         _this->MinimizeWindow(_this, window);
  1148     }
  1149     SDL_SendWindowEvent(window->id, SDL_WINDOWEVENT_MINIMIZED, 0, 0);
  1150 }
  1151 
  1152 void
  1153 SDL_RestoreWindow(SDL_WindowID windowID)
  1154 {
  1155     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1156 
  1157     if (!window
  1158         || !(window->flags & (SDL_WINDOW_MAXIMIZED | SDL_WINDOW_MINIMIZED))) {
  1159         return;
  1160     }
  1161 
  1162     if (_this->RestoreWindow) {
  1163         _this->RestoreWindow(_this, window);
  1164     }
  1165     SDL_SendWindowEvent(window->id, SDL_WINDOWEVENT_RESTORED, 0, 0);
  1166 }
  1167 
  1168 int
  1169 SDL_SetWindowFullscreen(SDL_WindowID windowID, int fullscreen)
  1170 {
  1171     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1172 
  1173     if (!window) {
  1174         return -1;
  1175     }
  1176     if (fullscreen) {
  1177         fullscreen = SDL_WINDOW_FULLSCREEN;
  1178     }
  1179     if ((window->flags & SDL_WINDOW_FULLSCREEN) == fullscreen) {
  1180         return 0;
  1181     }
  1182     if (fullscreen) {
  1183         window->flags |= SDL_WINDOW_FULLSCREEN;
  1184 
  1185         if (FULLSCREEN_VISIBLE(window)) {
  1186             SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
  1187 
  1188             /* Hide any other fullscreen windows */
  1189             int i;
  1190             for (i = 0; i < display->num_windows; ++i) {
  1191                 SDL_Window *other = &display->windows[i];
  1192                 if (other->id != windowID && FULLSCREEN_VISIBLE(other)) {
  1193                     SDL_MinimizeWindow(other->id);
  1194                 }
  1195             }
  1196 
  1197             SDL_SetDisplayMode(&display->fullscreen_mode);
  1198         }
  1199     } else {
  1200         window->flags &= ~SDL_WINDOW_FULLSCREEN;
  1201 
  1202         if (FULLSCREEN_VISIBLE(window)) {
  1203             SDL_SetDisplayMode(NULL);
  1204         }
  1205     }
  1206     return 0;
  1207 }
  1208 
  1209 void
  1210 SDL_SetWindowGrab(SDL_WindowID windowID, int mode)
  1211 {
  1212     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1213 
  1214     if (!window || (!!mode == !!(window->flags & SDL_WINDOW_INPUT_GRABBED))) {
  1215         return;
  1216     }
  1217     if (mode) {
  1218         window->flags |= SDL_WINDOW_INPUT_GRABBED;
  1219     } else {
  1220         window->flags &= ~SDL_WINDOW_INPUT_GRABBED;
  1221     }
  1222     SDL_UpdateWindowGrab(window);
  1223 }
  1224 
  1225 static void
  1226 SDL_UpdateWindowGrab(SDL_Window * window)
  1227 {
  1228     if ((window->flags & SDL_WINDOW_INPUT_FOCUS) && _this->SetWindowGrab) {
  1229         _this->SetWindowGrab(_this, window);
  1230     }
  1231 }
  1232 
  1233 int
  1234 SDL_GetWindowGrab(SDL_WindowID windowID)
  1235 {
  1236     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1237 
  1238     if (!window) {
  1239         return 0;
  1240     }
  1241     return ((window->flags & SDL_WINDOW_INPUT_GRABBED) != 0);
  1242 }
  1243 
  1244 void
  1245 SDL_OnWindowShown(SDL_Window * window)
  1246 {
  1247     if (window->flags & SDL_WINDOW_FULLSCREEN) {
  1248         SDL_SendWindowEvent(window->id, SDL_WINDOWEVENT_FOCUS_GAINED, 0, 0);
  1249     }
  1250 }
  1251 
  1252 void
  1253 SDL_OnWindowHidden(SDL_Window * window)
  1254 {
  1255     if (window->flags & SDL_WINDOW_FULLSCREEN) {
  1256         SDL_SendWindowEvent(window->id, SDL_WINDOWEVENT_FOCUS_LOST, 0, 0);
  1257     }
  1258 }
  1259 
  1260 void
  1261 SDL_OnWindowResized(SDL_Window * window)
  1262 {
  1263     SDL_Renderer *renderer = window->renderer;
  1264 
  1265     if (renderer && renderer->DisplayModeChanged) {
  1266         renderer->DisplayModeChanged(renderer);
  1267     }
  1268 }
  1269 
  1270 void
  1271 SDL_OnWindowFocusGained(SDL_Window * window)
  1272 {
  1273     SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
  1274 
  1275     if (window->flags & SDL_WINDOW_FULLSCREEN) {
  1276         SDL_SetDisplayMode(&display->fullscreen_mode);
  1277     }
  1278     if (display->gamma && _this->SetDisplayGammaRamp) {
  1279         _this->SetDisplayGammaRamp(_this, display->gamma);
  1280     }
  1281     if ((window->flags & (SDL_WINDOW_INPUT_GRABBED | SDL_WINDOW_FULLSCREEN))
  1282         && _this->SetWindowGrab) {
  1283         _this->SetWindowGrab(_this, window);
  1284     }
  1285 }
  1286 
  1287 void
  1288 SDL_OnWindowFocusLost(SDL_Window * window)
  1289 {
  1290     SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
  1291 
  1292     if (window->flags & SDL_WINDOW_FULLSCREEN) {
  1293         SDL_MinimizeWindow(window->id);
  1294         SDL_SetDisplayMode(NULL);
  1295     }
  1296     if (display->gamma && _this->SetDisplayGammaRamp) {
  1297         _this->SetDisplayGammaRamp(_this, display->saved_gamma);
  1298     }
  1299     if ((window->flags & (SDL_WINDOW_INPUT_GRABBED | SDL_WINDOW_FULLSCREEN))
  1300         && _this->SetWindowGrab) {
  1301         _this->SetWindowGrab(_this, window);
  1302     }
  1303 }
  1304 
  1305 SDL_WindowID
  1306 SDL_GetFocusWindow(void)
  1307 {
  1308     SDL_VideoDisplay *display;
  1309     int i;
  1310 
  1311     if (!_this) {
  1312         return 0;
  1313     }
  1314     display = &SDL_CurrentDisplay;
  1315     for (i = 0; i < display->num_windows; ++i) {
  1316         SDL_Window *window = &display->windows[i];
  1317 
  1318         if (window->flags & SDL_WINDOW_INPUT_FOCUS) {
  1319             return window->id;
  1320         }
  1321     }
  1322     return 0;
  1323 }
  1324 
  1325 void
  1326 SDL_DestroyWindow(SDL_WindowID windowID)
  1327 {
  1328     int i, j;
  1329 
  1330     if (!_this) {
  1331         return;
  1332     }
  1333     /* Restore video mode, etc. */
  1334     SDL_SendWindowEvent(windowID, SDL_WINDOWEVENT_FOCUS_LOST, 0, 0);
  1335 
  1336     for (i = 0; i < _this->num_displays; ++i) {
  1337         SDL_VideoDisplay *display = &_this->displays[i];
  1338         for (j = 0; j < display->num_windows; ++j) {
  1339             SDL_Window *window = &display->windows[j];
  1340             if (window->id != windowID) {
  1341                 continue;
  1342             }
  1343             if (window->title) {
  1344                 SDL_free(window->title);
  1345                 window->title = NULL;
  1346             }
  1347             if (window->renderer) {
  1348                 SDL_DestroyRenderer(window->id);
  1349                 window->renderer = NULL;
  1350             }
  1351             if (_this->DestroyWindow) {
  1352                 _this->DestroyWindow(_this, window);
  1353             }
  1354             if (j != display->num_windows - 1) {
  1355                 SDL_memcpy(&display->windows[i],
  1356                            &display->windows[i + 1],
  1357                            (display->num_windows - i - 1) * sizeof(*window));
  1358             }
  1359             --display->num_windows;
  1360             return;
  1361         }
  1362     }
  1363 }
  1364 
  1365 void
  1366 SDL_AddRenderDriver(int displayIndex, const SDL_RenderDriver * driver)
  1367 {
  1368     SDL_VideoDisplay *display;
  1369     SDL_RenderDriver *render_drivers;
  1370 
  1371     if (displayIndex >= _this->num_displays) {
  1372         return;
  1373     }
  1374     display = &_this->displays[displayIndex];
  1375 
  1376     render_drivers =
  1377         SDL_realloc(display->render_drivers,
  1378                     (display->num_render_drivers +
  1379                      1) * sizeof(*render_drivers));
  1380     if (render_drivers) {
  1381         render_drivers[display->num_render_drivers] = *driver;
  1382         display->render_drivers = render_drivers;
  1383         display->num_render_drivers++;
  1384     }
  1385 }
  1386 
  1387 int
  1388 SDL_GetNumRenderDrivers(void)
  1389 {
  1390     if (_this) {
  1391         return SDL_CurrentDisplay.num_render_drivers;
  1392     }
  1393     return 0;
  1394 }
  1395 
  1396 int
  1397 SDL_GetRenderDriverInfo(int index, SDL_RendererInfo * info)
  1398 {
  1399     if (!_this) {
  1400         SDL_UninitializedVideo();
  1401         return -1;
  1402     }
  1403     if (index < 0 || index >= SDL_GetNumRenderDrivers()) {
  1404         SDL_SetError("index must be in the range of 0 - %d",
  1405                      SDL_GetNumRenderDrivers() - 1);
  1406         return -1;
  1407     }
  1408     *info = SDL_CurrentDisplay.render_drivers[index].info;
  1409     return 0;
  1410 }
  1411 
  1412 int
  1413 SDL_CreateRenderer(SDL_WindowID windowID, int index, Uint32 flags)
  1414 {
  1415     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1416 
  1417     if (!window) {
  1418         return 0;
  1419     }
  1420     if (index < 0) {
  1421         const char *override = SDL_getenv("SDL_VIDEO_RENDERER");
  1422         int n = SDL_GetNumRenderDrivers();
  1423         for (index = 0; index < n; ++index) {
  1424             SDL_RenderDriver *driver =
  1425                 &SDL_CurrentDisplay.render_drivers[index];
  1426 
  1427             if (override) {
  1428                 if (SDL_strcasecmp(override, driver->info.name) == 0) {
  1429                     break;
  1430                 }
  1431             } else {
  1432                 if ((driver->info.flags & flags) == flags) {
  1433                     break;
  1434                 }
  1435             }
  1436         }
  1437         if (index == n) {
  1438             SDL_SetError("Couldn't find matching render driver");
  1439             return -1;
  1440         }
  1441     }
  1442     if (index >= SDL_GetNumRenderDrivers()) {
  1443         SDL_SetError("index must be -1 or in the range of 0 - %d",
  1444                      SDL_GetNumRenderDrivers() - 1);
  1445         return -1;
  1446     }
  1447     /* Free any existing renderer */
  1448     SDL_DestroyRenderer(windowID);
  1449 
  1450     /* Create a new renderer instance */
  1451     window->renderer = SDL_CurrentDisplay.render_drivers[index]
  1452         .CreateRenderer(window, flags);
  1453     SDL_SelectRenderer(window->id);
  1454 
  1455     return 0;
  1456 }
  1457 
  1458 int
  1459 SDL_SelectRenderer(SDL_WindowID windowID)
  1460 {
  1461     SDL_Window *window = SDL_GetWindowFromID(windowID);
  1462     SDL_Renderer *renderer;
  1463 
  1464     if (!window || !window->renderer) {
  1465         return -1;
  1466     }
  1467     renderer = window->renderer;
  1468     if (renderer && renderer->ActivateRenderer) {
  1469         if (renderer->ActivateRenderer(renderer) < 0) {
  1470             return -1;
  1471         }
  1472     }
  1473     SDL_CurrentDisplay.current_renderer = renderer;
  1474     return 0;
  1475 }
  1476 
  1477 int
  1478 SDL_GetRendererInfo(SDL_RendererInfo * info)
  1479 {
  1480     if (!_this) {
  1481         SDL_UninitializedVideo();
  1482         return -1;
  1483     }
  1484     if (!SDL_CurrentDisplay.current_renderer) {
  1485         SDL_SetError("There is no current renderer");
  1486         return -1;
  1487     }
  1488     *info = SDL_CurrentDisplay.current_renderer->info;
  1489     return 0;
  1490 }
  1491 
  1492 SDL_TextureID
  1493 SDL_CreateTexture(Uint32 format, int access, int w, int h)
  1494 {
  1495     int hash;
  1496     SDL_Renderer *renderer;
  1497     SDL_Texture *texture;
  1498 
  1499     if (!_this) {
  1500         SDL_UninitializedVideo();
  1501         return 0;
  1502     }
  1503     renderer = SDL_CurrentDisplay.current_renderer;
  1504     if (!renderer) {
  1505         return 0;
  1506     }
  1507     if (!renderer->CreateTexture) {
  1508         SDL_Unsupported();
  1509         return 0;
  1510     }
  1511     texture = (SDL_Texture *) SDL_calloc(1, sizeof(*texture));
  1512     if (!texture) {
  1513         SDL_OutOfMemory();
  1514         return 0;
  1515     }
  1516     texture->id = _this->next_object_id++;
  1517     texture->format = format;
  1518     texture->access = access;
  1519     texture->w = w;
  1520     texture->h = h;
  1521     texture->r = 255;
  1522     texture->g = 255;
  1523     texture->b = 255;
  1524     texture->a = 255;
  1525     texture->renderer = renderer;
  1526 
  1527     if (renderer->CreateTexture(renderer, texture) < 0) {
  1528         if (renderer->DestroyTexture) {
  1529             renderer->DestroyTexture(renderer, texture);
  1530         }
  1531         SDL_free(texture);
  1532         return 0;
  1533     }
  1534     hash = (texture->id % SDL_arraysize(SDL_CurrentDisplay.textures));
  1535     texture->next = SDL_CurrentDisplay.textures[hash];
  1536     SDL_CurrentDisplay.textures[hash] = texture;
  1537 
  1538     return texture->id;
  1539 }
  1540 
  1541 SDL_TextureID
  1542 SDL_CreateTextureFromSurface(Uint32 format, SDL_Surface * surface)
  1543 {
  1544     SDL_TextureID textureID;
  1545     SDL_PixelFormat *fmt;
  1546     int bpp;
  1547     Uint32 Rmask, Gmask, Bmask, Amask;
  1548 
  1549     if (!surface) {
  1550         SDL_SetError("SDL_CreateTextureFromSurface() passed NULL surface");
  1551         return 0;
  1552     }
  1553     fmt = surface->format;
  1554 
  1555     if (format) {
  1556         if (!SDL_PixelFormatEnumToMasks
  1557             (format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
  1558             SDL_SetError("Unknown pixel format");
  1559             return 0;
  1560         }
  1561     } else {
  1562         if (surface->format->Amask
  1563             || !(surface->map->info.flags &
  1564                  (SDL_COPY_COLORKEY | SDL_COPY_MASK | SDL_COPY_BLEND))) {
  1565             bpp = fmt->BitsPerPixel;
  1566             Rmask = fmt->Rmask;
  1567             Gmask = fmt->Gmask;
  1568             Bmask = fmt->Bmask;
  1569             Amask = fmt->Amask;
  1570         } else {
  1571             /* Need a format with alpha */
  1572             bpp = 32;
  1573             Rmask = 0x00FF0000;
  1574             Gmask = 0x0000FF00;
  1575             Bmask = 0x000000FF;
  1576             Amask = 0xFF000000;
  1577         }
  1578         format = SDL_MasksToPixelFormatEnum(bpp, Rmask, Gmask, Bmask, Amask);
  1579         if (!format) {
  1580             SDL_SetError("Unknown pixel format");
  1581             return 0;
  1582         }
  1583     }
  1584 
  1585     textureID =
  1586         SDL_CreateTexture(format, SDL_TEXTUREACCESS_STATIC, surface->w,
  1587                           surface->h);
  1588     if (!textureID) {
  1589         return 0;
  1590     }
  1591     if (bpp == fmt->BitsPerPixel && Rmask == fmt->Rmask && Gmask == fmt->Gmask
  1592         && Bmask == fmt->Bmask && Amask == fmt->Amask) {
  1593         if (SDL_MUSTLOCK(surface)) {
  1594             if (SDL_LockSurface(surface) < 0) {
  1595                 SDL_DestroyTexture(textureID);
  1596                 return 0;
  1597             }
  1598             SDL_UpdateTexture(textureID, NULL, surface->pixels,
  1599                               surface->pitch);
  1600             SDL_UnlockSurface(surface);
  1601         } else {
  1602             SDL_UpdateTexture(textureID, NULL, surface->pixels,
  1603                               surface->pitch);
  1604         }
  1605     } else {
  1606         SDL_PixelFormat dst_fmt;
  1607         SDL_Surface *dst = NULL;
  1608 
  1609         /* Set up a destination surface for the texture update */
  1610         SDL_InitFormat(&dst_fmt, bpp, Rmask, Gmask, Bmask, Amask);
  1611         if (SDL_ISPIXELFORMAT_INDEXED(format)) {
  1612             dst_fmt.palette =
  1613                 SDL_AllocPalette((1 << SDL_BITSPERPIXEL(format)));
  1614             if (dst_fmt.palette) {
  1615                 /*
  1616                  * FIXME: Should we try to copy
  1617                  * fmt->palette?
  1618                  */
  1619                 SDL_DitherColors(dst_fmt.palette->colors,
  1620                                  SDL_BITSPERPIXEL(format));
  1621             }
  1622         }
  1623         dst = SDL_ConvertSurface(surface, &dst_fmt, 0);
  1624         if (dst) {
  1625             SDL_UpdateTexture(textureID, NULL, dst->pixels, dst->pitch);
  1626             SDL_FreeSurface(dst);
  1627         }
  1628         if (dst_fmt.palette) {
  1629             SDL_FreePalette(dst_fmt.palette);
  1630         }
  1631         if (!dst) {
  1632             SDL_DestroyTexture(textureID);
  1633             return 0;
  1634         }
  1635     }
  1636 
  1637     if (SDL_ISPIXELFORMAT_INDEXED(format) && fmt->palette) {
  1638         SDL_SetTexturePalette(textureID, fmt->palette->colors, 0,
  1639                               fmt->palette->ncolors);
  1640     }
  1641     return textureID;
  1642 }
  1643 
  1644 static __inline__ SDL_Texture *
  1645 SDL_GetTextureFromID(SDL_TextureID textureID)
  1646 {
  1647     int hash;
  1648     SDL_Texture *texture;
  1649 
  1650     if (!_this) {
  1651         return NULL;
  1652     }
  1653     hash = (textureID % SDL_arraysize(SDL_CurrentDisplay.textures));
  1654     for (texture = SDL_CurrentDisplay.textures[hash]; texture;
  1655          texture = texture->next) {
  1656         if (texture->id == textureID) {
  1657             return texture;
  1658         }
  1659     }
  1660     return NULL;
  1661 }
  1662 
  1663 int
  1664 SDL_QueryTexture(SDL_TextureID textureID, Uint32 * format, int *access,
  1665                  int *w, int *h)
  1666 {
  1667     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1668 
  1669     if (!texture) {
  1670         return -1;
  1671     }
  1672     if (format) {
  1673         *format = texture->format;
  1674     }
  1675     if (access) {
  1676         *access = texture->access;
  1677     }
  1678     if (w) {
  1679         *w = texture->w;
  1680     }
  1681     if (h) {
  1682         *h = texture->h;
  1683     }
  1684     return 0;
  1685 }
  1686 
  1687 int
  1688 SDL_QueryTexturePixels(SDL_TextureID textureID, void **pixels, int *pitch)
  1689 {
  1690     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1691     SDL_Renderer *renderer;
  1692 
  1693     if (!texture) {
  1694         return -1;
  1695     }
  1696     renderer = texture->renderer;
  1697     if (!renderer->QueryTexturePixels) {
  1698         SDL_Unsupported();
  1699         return -1;
  1700     }
  1701     return renderer->QueryTexturePixels(renderer, texture, pixels, pitch);
  1702 }
  1703 
  1704 int
  1705 SDL_SetTexturePalette(SDL_TextureID textureID, const SDL_Color * colors,
  1706                       int firstcolor, int ncolors)
  1707 {
  1708     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1709     SDL_Renderer *renderer;
  1710 
  1711     if (!texture) {
  1712         return -1;
  1713     }
  1714     renderer = texture->renderer;
  1715     if (!renderer->SetTexturePalette) {
  1716         SDL_Unsupported();
  1717         return -1;
  1718     }
  1719     return renderer->SetTexturePalette(renderer, texture, colors, firstcolor,
  1720                                        ncolors);
  1721 }
  1722 
  1723 int
  1724 SDL_GetTexturePalette(SDL_TextureID textureID, SDL_Color * colors,
  1725                       int firstcolor, int ncolors)
  1726 {
  1727     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1728     SDL_Renderer *renderer;
  1729 
  1730     if (!texture) {
  1731         return -1;
  1732     }
  1733     renderer = texture->renderer;
  1734     if (!renderer->GetTexturePalette) {
  1735         SDL_Unsupported();
  1736         return -1;
  1737     }
  1738     return renderer->GetTexturePalette(renderer, texture, colors, firstcolor,
  1739                                        ncolors);
  1740 }
  1741 
  1742 int
  1743 SDL_SetTextureColorMod(SDL_TextureID textureID, Uint8 r, Uint8 g, Uint8 b)
  1744 {
  1745     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1746     SDL_Renderer *renderer;
  1747 
  1748     if (!texture) {
  1749         return -1;
  1750     }
  1751     renderer = texture->renderer;
  1752     if (!renderer->SetTextureColorMod) {
  1753         SDL_Unsupported();
  1754         return -1;
  1755     }
  1756     if (r < 255 || g < 255 || b < 255) {
  1757         texture->modMode |= SDL_TEXTUREMODULATE_COLOR;
  1758     } else {
  1759         texture->modMode &= ~SDL_TEXTUREMODULATE_COLOR;
  1760     }
  1761     texture->r = r;
  1762     texture->g = g;
  1763     texture->b = b;
  1764     return renderer->SetTextureColorMod(renderer, texture);
  1765 }
  1766 
  1767 int
  1768 SDL_GetTextureColorMod(SDL_TextureID textureID, Uint8 * r, Uint8 * g,
  1769                        Uint8 * b)
  1770 {
  1771     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1772     SDL_Renderer *renderer;
  1773 
  1774     if (!texture) {
  1775         return -1;
  1776     }
  1777     renderer = texture->renderer;
  1778     if (r) {
  1779         *r = texture->r;
  1780     }
  1781     if (g) {
  1782         *g = texture->g;
  1783     }
  1784     if (b) {
  1785         *b = texture->b;
  1786     }
  1787     return 0;
  1788 }
  1789 
  1790 int
  1791 SDL_SetTextureAlphaMod(SDL_TextureID textureID, Uint8 alpha)
  1792 {
  1793     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1794     SDL_Renderer *renderer;
  1795 
  1796     if (!texture) {
  1797         return -1;
  1798     }
  1799     renderer = texture->renderer;
  1800     if (!renderer->SetTextureAlphaMod) {
  1801         SDL_Unsupported();
  1802         return -1;
  1803     }
  1804     if (alpha < 255) {
  1805         texture->modMode |= SDL_TEXTUREMODULATE_ALPHA;
  1806     } else {
  1807         texture->modMode &= ~SDL_TEXTUREMODULATE_ALPHA;
  1808     }
  1809     texture->a = alpha;
  1810     return renderer->SetTextureAlphaMod(renderer, texture);
  1811 }
  1812 
  1813 int
  1814 SDL_GetTextureAlphaMod(SDL_TextureID textureID, Uint8 * alpha)
  1815 {
  1816     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1817 
  1818     if (!texture) {
  1819         return -1;
  1820     }
  1821     if (alpha) {
  1822         *alpha = texture->a;
  1823     }
  1824     return 0;
  1825 }
  1826 
  1827 int
  1828 SDL_SetTextureBlendMode(SDL_TextureID textureID, int blendMode)
  1829 {
  1830     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1831     SDL_Renderer *renderer;
  1832 
  1833     if (!texture) {
  1834         return -1;
  1835     }
  1836     renderer = texture->renderer;
  1837     if (!renderer->SetTextureBlendMode) {
  1838         SDL_Unsupported();
  1839         return -1;
  1840     }
  1841     texture->blendMode = blendMode;
  1842     return renderer->SetTextureBlendMode(renderer, texture);
  1843 }
  1844 
  1845 int
  1846 SDL_GetTextureBlendMode(SDL_TextureID textureID, int *blendMode)
  1847 {
  1848     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1849 
  1850     if (!texture) {
  1851         return -1;
  1852     }
  1853     if (blendMode) {
  1854         *blendMode = texture->blendMode;
  1855     }
  1856     return 0;
  1857 }
  1858 
  1859 int
  1860 SDL_SetTextureScaleMode(SDL_TextureID textureID, int scaleMode)
  1861 {
  1862     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1863     SDL_Renderer *renderer;
  1864 
  1865     if (!texture) {
  1866         return -1;
  1867     }
  1868     renderer = texture->renderer;
  1869     if (!renderer->SetTextureScaleMode) {
  1870         SDL_Unsupported();
  1871         return -1;
  1872     }
  1873     texture->scaleMode = scaleMode;
  1874     return renderer->SetTextureScaleMode(renderer, texture);
  1875 }
  1876 
  1877 int
  1878 SDL_GetTextureScaleMode(SDL_TextureID textureID, int *scaleMode)
  1879 {
  1880     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1881 
  1882     if (!texture) {
  1883         return -1;
  1884     }
  1885     if (scaleMode) {
  1886         *scaleMode = texture->scaleMode;
  1887     }
  1888     return 0;
  1889 }
  1890 
  1891 int
  1892 SDL_UpdateTexture(SDL_TextureID textureID, const SDL_Rect * rect,
  1893                   const void *pixels, int pitch)
  1894 {
  1895     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1896     SDL_Renderer *renderer;
  1897     SDL_Rect full_rect;
  1898 
  1899     if (!texture) {
  1900         return -1;
  1901     }
  1902     renderer = texture->renderer;
  1903     if (!renderer->UpdateTexture) {
  1904         SDL_Unsupported();
  1905         return -1;
  1906     }
  1907     if (!rect) {
  1908         full_rect.x = 0;
  1909         full_rect.y = 0;
  1910         full_rect.w = texture->w;
  1911         full_rect.h = texture->h;
  1912         rect = &full_rect;
  1913     }
  1914     return renderer->UpdateTexture(renderer, texture, rect, pixels, pitch);
  1915 }
  1916 
  1917 int
  1918 SDL_LockTexture(SDL_TextureID textureID, const SDL_Rect * rect, int markDirty,
  1919                 void **pixels, int *pitch)
  1920 {
  1921     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1922     SDL_Renderer *renderer;
  1923     SDL_Rect full_rect;
  1924 
  1925     if (!texture) {
  1926         return -1;
  1927     }
  1928     if (texture->access != SDL_TEXTUREACCESS_STREAMING) {
  1929         SDL_SetError("SDL_LockTexture(): texture must be streaming");
  1930         return -1;
  1931     }
  1932     renderer = texture->renderer;
  1933     if (!renderer->LockTexture) {
  1934         SDL_Unsupported();
  1935         return -1;
  1936     }
  1937     if (!rect) {
  1938         full_rect.x = 0;
  1939         full_rect.y = 0;
  1940         full_rect.w = texture->w;
  1941         full_rect.h = texture->h;
  1942         rect = &full_rect;
  1943     }
  1944     return renderer->LockTexture(renderer, texture, rect, markDirty, pixels,
  1945                                  pitch);
  1946 }
  1947 
  1948 void
  1949 SDL_UnlockTexture(SDL_TextureID textureID)
  1950 {
  1951     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1952     SDL_Renderer *renderer;
  1953 
  1954     if (!texture) {
  1955         return;
  1956     }
  1957     if (texture->access != SDL_TEXTUREACCESS_STREAMING) {
  1958         return;
  1959     }
  1960     renderer = texture->renderer;
  1961     if (!renderer->UnlockTexture) {
  1962         return;
  1963     }
  1964     renderer->UnlockTexture(renderer, texture);
  1965 }
  1966 
  1967 void
  1968 SDL_DirtyTexture(SDL_TextureID textureID, int numrects,
  1969                  const SDL_Rect * rects)
  1970 {
  1971     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  1972     SDL_Renderer *renderer;
  1973 
  1974     if (!texture) {
  1975         return;
  1976     }
  1977     if (texture->access != SDL_TEXTUREACCESS_STREAMING) {
  1978         return;
  1979     }
  1980     renderer = texture->renderer;
  1981     if (!renderer->DirtyTexture) {
  1982         return;
  1983     }
  1984     renderer->DirtyTexture(renderer, texture, numrects, rects);
  1985 }
  1986 
  1987 int
  1988 SDL_SetRenderDrawColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a)
  1989 {
  1990     SDL_Renderer *renderer;
  1991 
  1992     if (!_this) {
  1993         SDL_UninitializedVideo();
  1994         return -1;
  1995     }
  1996     renderer = SDL_CurrentDisplay.current_renderer;
  1997     if (!renderer) {
  1998         return -1;
  1999     }
  2000     renderer->r = r;
  2001     renderer->g = g;
  2002     renderer->b = b;
  2003     renderer->a = a;
  2004     if (renderer->SetDrawColor) {
  2005         return renderer->SetDrawColor(renderer);
  2006     } else {
  2007         return 0;
  2008     }
  2009 }
  2010 
  2011 int
  2012 SDL_GetRenderDrawColor(Uint8 * r, Uint8 * g, Uint8 * b, Uint8 * a)
  2013 {
  2014     SDL_Renderer *renderer;
  2015 
  2016     if (!_this) {
  2017         SDL_UninitializedVideo();
  2018         return -1;
  2019     }
  2020     renderer = SDL_CurrentDisplay.current_renderer;
  2021     if (!renderer) {
  2022         return -1;
  2023     }
  2024     if (r) {
  2025         *r = renderer->r;
  2026     }
  2027     if (g) {
  2028         *g = renderer->g;
  2029     }
  2030     if (b) {
  2031         *b = renderer->b;
  2032     }
  2033     if (a) {
  2034         *a = renderer->a;
  2035     }
  2036     return 0;
  2037 }
  2038 
  2039 int
  2040 SDL_SetRenderDrawBlendMode(int blendMode)
  2041 {
  2042     SDL_Renderer *renderer;
  2043 
  2044     if (!_this) {
  2045         SDL_UninitializedVideo();
  2046         return -1;
  2047     }
  2048     renderer = SDL_CurrentDisplay.current_renderer;
  2049     if (!renderer) {
  2050         return -1;
  2051     }
  2052     renderer->blendMode = blendMode;
  2053     if (renderer->SetDrawBlendMode) {
  2054         return renderer->SetDrawBlendMode(renderer);
  2055     } else {
  2056         return 0;
  2057     }
  2058 }
  2059 
  2060 int
  2061 SDL_GetRenderDrawBlendMode(int *blendMode)
  2062 {
  2063     SDL_Renderer *renderer;
  2064 
  2065     if (!_this) {
  2066         SDL_UninitializedVideo();
  2067         return -1;
  2068     }
  2069     renderer = SDL_CurrentDisplay.current_renderer;
  2070     if (!renderer) {
  2071         return -1;
  2072     }
  2073     *blendMode = renderer->blendMode;
  2074     return 0;
  2075 }
  2076 
  2077 int
  2078 SDL_RenderPoint(int x, int y)
  2079 {
  2080     SDL_Renderer *renderer;
  2081     SDL_Window *window;
  2082 
  2083     if (!_this) {
  2084         SDL_UninitializedVideo();
  2085         return -1;
  2086     }
  2087     renderer = SDL_CurrentDisplay.current_renderer;
  2088     if (!renderer) {
  2089         return -1;
  2090     }
  2091     if (!renderer->RenderPoint) {
  2092         SDL_Unsupported();
  2093         return -1;
  2094     }
  2095     window = SDL_GetWindowFromID(renderer->window);
  2096     if (x < 0 || y < 0 || x >= window->w || y >= window->h) {
  2097         return 0;
  2098     }
  2099     return renderer->RenderPoint(renderer, x, y);
  2100 }
  2101 
  2102 int
  2103 SDL_RenderLine(int x1, int y1, int x2, int y2)
  2104 {
  2105     SDL_Renderer *renderer;
  2106     SDL_Window *window;
  2107     SDL_Rect real_rect;
  2108 
  2109     if (x1 == x2 && y1 == y2) {
  2110         return SDL_RenderPoint(x1, y1);
  2111     }
  2112 
  2113     if (!_this) {
  2114         SDL_UninitializedVideo();
  2115         return -1;
  2116     }
  2117     renderer = SDL_CurrentDisplay.current_renderer;
  2118     if (!renderer) {
  2119         return -1;
  2120     }
  2121     if (!renderer->RenderLine) {
  2122         SDL_Unsupported();
  2123         return -1;
  2124     }
  2125     window = SDL_GetWindowFromID(renderer->window);
  2126 
  2127     real_rect.x = 0;
  2128     real_rect.y = 0;
  2129     real_rect.w = window->w;
  2130     real_rect.h = window->h;
  2131     if (!SDL_IntersectRectAndLine(&real_rect, &x1, &y1, &x2, &y2)) {
  2132         return (0);
  2133     }
  2134     return renderer->RenderLine(renderer, x1, y1, x2, y2);
  2135 }
  2136 
  2137 int
  2138 SDL_RenderFill(const SDL_Rect * rect)
  2139 {
  2140     SDL_Renderer *renderer;
  2141     SDL_Window *window;
  2142     SDL_Rect real_rect;
  2143 
  2144     if (!_this) {
  2145         SDL_UninitializedVideo();
  2146         return -1;
  2147     }
  2148     renderer = SDL_CurrentDisplay.current_renderer;
  2149     if (!renderer) {
  2150         return -1;
  2151     }
  2152     if (!renderer->RenderFill) {
  2153         SDL_Unsupported();
  2154         return -1;
  2155     }
  2156     window = SDL_GetWindowFromID(renderer->window);
  2157 
  2158     real_rect.x = 0;
  2159     real_rect.y = 0;
  2160     real_rect.w = window->w;
  2161     real_rect.h = window->h;
  2162     if (rect) {
  2163         if (!SDL_IntersectRect(rect, &real_rect, &real_rect)) {
  2164             return 0;
  2165         }
  2166     }
  2167     return renderer->RenderFill(renderer, &real_rect);
  2168 }
  2169 
  2170 int
  2171 SDL_RenderCopy(SDL_TextureID textureID, const SDL_Rect * srcrect,
  2172                const SDL_Rect * dstrect)
  2173 {
  2174     SDL_Texture *texture = SDL_GetTextureFromID(textureID);
  2175     SDL_Renderer *renderer;
  2176     SDL_Window *window;
  2177     SDL_Rect real_srcrect;
  2178     SDL_Rect real_dstrect;
  2179 
  2180     if (!texture || texture->renderer != SDL_CurrentDisplay.current_renderer) {
  2181         return -1;
  2182     }
  2183     renderer = SDL_CurrentDisplay.current_renderer;
  2184     if (!renderer) {
  2185         return -1;
  2186     }
  2187     if (!renderer->RenderCopy) {
  2188         SDL_Unsupported();
  2189         return -1;
  2190     }
  2191     window = SDL_GetWindowFromID(renderer->window);
  2192 
  2193     real_srcrect.x = 0;
  2194     real_srcrect.y = 0;
  2195     real_srcrect.w = texture->w;
  2196     real_srcrect.h = texture->h;
  2197     if (srcrect) {
  2198         if (!SDL_IntersectRect(srcrect, &real_srcrect, &real_srcrect)) {
  2199             return 0;
  2200         }
  2201     }
  2202 
  2203     real_dstrect.x = 0;
  2204     real_dstrect.y = 0;
  2205     real_dstrect.w = window->w;
  2206     real_dstrect.h = window->h;
  2207     if (dstrect) {
  2208         if (!SDL_IntersectRect(dstrect, &real_dstrect, &real_dstrect)) {
  2209             return 0;
  2210         }
  2211         /* Clip srcrect by the same amount as dstrect was clipped */
  2212         if (dstrect->w != real_dstrect.w) {
  2213             int deltax = (real_dstrect.x - dstrect->x);
  2214             int deltaw = (real_dstrect.w - dstrect->w);
  2215             real_srcrect.x += (deltax * dstrect->w) / real_srcrect.w;
  2216             real_srcrect.w += (deltaw * dstrect->w) / real_srcrect.w;
  2217         }
  2218         if (dstrect->h != real_dstrect.h) {
  2219             int deltay = (real_dstrect.y - dstrect->y);
  2220             int deltah = (real_dstrect.h - dstrect->h);
  2221             real_srcrect.y += (deltay * dstrect->h) / real_srcrect.h;
  2222             real_srcrect.h += (deltah * dstrect->h) / real_srcrect.h;
  2223         }
  2224     }
  2225 
  2226     return renderer->RenderCopy(renderer, texture, &real_srcrect,
  2227                                 &real_dstrect);
  2228 }
  2229 
  2230 void
  2231 SDL_RenderPresent(void)
  2232 {
  2233     SDL_Renderer *renderer;
  2234 
  2235     if (!_this) {
  2236         SDL_UninitializedVideo();
  2237         return;
  2238     }
  2239     renderer = SDL_CurrentDisplay.current_renderer;
  2240     if (!renderer || !renderer->RenderPresent) {
  2241         return;
  2242     }
  2243     renderer->RenderPresent(renderer);
  2244 }
  2245 
  2246 void
  2247 SDL_DestroyTexture(SDL_TextureID textureID)
  2248 {
  2249     int hash;
  2250     SDL_Texture *prev, *texture;
  2251     SDL_Renderer *renderer;
  2252 
  2253     if (!_this) {
  2254         SDL_UninitializedVideo();
  2255         return;
  2256     }
  2257     /* Look up the texture in the hash table */
  2258     hash = (textureID % SDL_arraysize(SDL_CurrentDisplay.textures));
  2259     prev = NULL;
  2260     for (texture = SDL_CurrentDisplay.textures[hash]; texture;
  2261          prev = texture, texture = texture->next) {
  2262         if (texture->id == textureID) {
  2263             break;
  2264         }
  2265     }
  2266     if (!texture) {
  2267         return;
  2268     }
  2269     /* Unlink the texture from the list */
  2270     if (prev) {
  2271         prev->next = texture->next;
  2272     } else {
  2273         SDL_CurrentDisplay.textures[hash] = texture->next;
  2274     }
  2275 
  2276     /* Free the texture */
  2277     renderer = texture->renderer;
  2278     renderer->DestroyTexture(renderer, texture);
  2279     SDL_free(texture);
  2280 }
  2281 
  2282 void
  2283 SDL_DestroyRenderer(SDL_WindowID windowID)
  2284 {
  2285     SDL_Window *window = SDL_GetWindowFromID(windowID);
  2286     SDL_Renderer *renderer;
  2287     int i;
  2288 
  2289     if (!window) {
  2290         return;
  2291     }
  2292     renderer = window->renderer;
  2293     if (!renderer) {
  2294         return;
  2295     }
  2296     /* Free existing textures for this renderer */
  2297     for (i = 0; i < SDL_arraysize(SDL_CurrentDisplay.textures); ++i) {
  2298         SDL_Texture *texture;
  2299         SDL_Texture *prev = NULL;
  2300         SDL_Texture *next;
  2301         for (texture = SDL_CurrentDisplay.textures[i]; texture;
  2302              texture = next) {
  2303             next = texture->next;
  2304             if (texture->renderer == renderer) {
  2305                 if (prev) {
  2306                     prev->next = next;
  2307                 } else {
  2308                     SDL_CurrentDisplay.textures[i] = next;
  2309                 }
  2310                 renderer->DestroyTexture(renderer, texture);
  2311                 SDL_free(texture);
  2312             } else {
  2313                 prev = texture;
  2314             }
  2315         }
  2316     }
  2317 
  2318     /* Free the renderer instance */
  2319     renderer->DestroyRenderer(renderer);
  2320 
  2321     /* Clear references */
  2322     window->renderer = NULL;
  2323     if (SDL_CurrentDisplay.current_renderer == renderer) {
  2324         SDL_CurrentDisplay.current_renderer = NULL;
  2325     }
  2326 }
  2327 
  2328 void
  2329 SDL_VideoQuit(void)
  2330 {
  2331     int i, j;
  2332 
  2333     if (!_this) {
  2334         return;
  2335     }
  2336     /* Halt event processing before doing anything else */
  2337     SDL_StopEventLoop();
  2338 
  2339     /* Clean up the system video */
  2340     for (i = _this->num_displays; i--;) {
  2341         SDL_VideoDisplay *display = &_this->displays[i];
  2342         for (j = display->num_windows; j--;) {
  2343             SDL_DestroyWindow(display->windows[i].id);
  2344         }
  2345         if (display->windows) {
  2346             SDL_free(display->windows);
  2347             display->windows = NULL;
  2348         }
  2349         display->num_windows = 0;
  2350         if (display->render_drivers) {
  2351             SDL_free(display->render_drivers);
  2352             display->render_drivers = NULL;
  2353         }
  2354         display->num_render_drivers = 0;
  2355     }
  2356     _this->VideoQuit(_this);
  2357 
  2358     for (i = _this->num_displays; i--;) {
  2359         SDL_VideoDisplay *display = &_this->displays[i];
  2360         for (j = display->num_display_modes; j--;) {
  2361             if (display->display_modes[j].driverdata) {
  2362                 SDL_free(display->display_modes[j].driverdata);
  2363                 display->display_modes[j].driverdata = NULL;
  2364             }
  2365         }
  2366         if (display->display_modes) {
  2367             SDL_free(display->display_modes);
  2368             display->display_modes = NULL;
  2369         }
  2370         if (display->desktop_mode.driverdata) {
  2371             SDL_free(display->desktop_mode.driverdata);
  2372             display->desktop_mode.driverdata = NULL;
  2373         }
  2374         if (display->palette) {
  2375             SDL_FreePalette(display->palette);
  2376             display->palette = NULL;
  2377         }
  2378         if (display->gamma) {
  2379             SDL_free(display->gamma);
  2380             display->gamma = NULL;
  2381         }
  2382         if (display->driverdata) {
  2383             SDL_free(display->driverdata);
  2384             display->driverdata = NULL;
  2385         }
  2386     }
  2387     if (_this->displays) {
  2388         SDL_free(_this->displays);
  2389         _this->displays = NULL;
  2390     }
  2391     _this->free(_this);
  2392     _this = NULL;
  2393 }
  2394 
  2395 int
  2396 SDL_GL_LoadLibrary(const char *path)
  2397 {
  2398     int retval;
  2399 
  2400     if (!_this) {
  2401         SDL_UninitializedVideo();
  2402         return -1;
  2403     }
  2404     if (_this->GL_LoadLibrary) {
  2405         retval = _this->GL_LoadLibrary(_this, path);
  2406     } else {
  2407         SDL_SetError("No dynamic GL support in video driver");
  2408         retval = -1;
  2409     }
  2410     return (retval);
  2411 }
  2412 
  2413 void *
  2414 SDL_GL_GetProcAddress(const char *proc)
  2415 {
  2416     void *func;
  2417 
  2418     if (!_this) {
  2419         SDL_UninitializedVideo();
  2420         return NULL;
  2421     }
  2422     func = NULL;
  2423     if (_this->GL_GetProcAddress) {
  2424         if (_this->gl_config.driver_loaded) {
  2425             func = _this->GL_GetProcAddress(_this, proc);
  2426         } else {
  2427             SDL_SetError("No GL driver has been loaded");
  2428         }
  2429     } else {
  2430         SDL_SetError("No dynamic GL support in video driver");
  2431     }
  2432     return func;
  2433 }
  2434 
  2435 SDL_bool
  2436 SDL_GL_ExtensionSupported(const char *extension)
  2437 {
  2438 #if SDL_VIDEO_OPENGL || SDL_VIDEO_OPENGL_ES
  2439     const GLubyte *(APIENTRY * glGetStringFunc) (GLenum);
  2440     const char *extensions;
  2441     const char *start;
  2442     const char *where, *terminator;
  2443 
  2444     /* Extension names should not have spaces. */
  2445     where = SDL_strchr(extension, ' ');
  2446     if (where || *extension == '\0') {
  2447         return SDL_FALSE;
  2448     }
  2449     /* See if there's an environment variable override */
  2450     start = SDL_getenv(extension);
  2451     if (start && *start == '0') {
  2452         return SDL_FALSE;
  2453     }
  2454     /* Lookup the available extensions */
  2455     glGetStringFunc = SDL_GL_GetProcAddress("glGetString");
  2456     if (glGetStringFunc) {
  2457         extensions = (const char *) glGetStringFunc(GL_EXTENSIONS);
  2458     } else {
  2459         extensions = NULL;
  2460     }
  2461     if (!extensions) {
  2462         return SDL_FALSE;
  2463     }
  2464     /*
  2465      * It takes a bit of care to be fool-proof about parsing the OpenGL
  2466      * extensions string. Don't be fooled by sub-strings, etc.
  2467      */
  2468 
  2469     start = extensions;
  2470 
  2471     for (;;) {
  2472         where = SDL_strstr(start, extension);
  2473         if (!where)
  2474             break;
  2475 
  2476         terminator = where + SDL_strlen(extension);
  2477         if (where == start || *(where - 1) == ' ')
  2478             if (*terminator == ' ' || *terminator == '\0')
  2479                 return SDL_TRUE;
  2480 
  2481         start = terminator;
  2482     }
  2483     return SDL_FALSE;
  2484 #else
  2485     return SDL_FALSE;
  2486 #endif
  2487 }
  2488 
  2489 int
  2490 SDL_GL_SetAttribute(SDL_GLattr attr, int value)
  2491 {
  2492 #if SDL_VIDEO_OPENGL || SDL_VIDEO_OPENGL_ES
  2493     int retval;
  2494 
  2495     if (!_this) {
  2496         SDL_UninitializedVideo();
  2497         return -1;
  2498     }
  2499     retval = 0;
  2500     switch (attr) {
  2501     case SDL_GL_RED_SIZE:
  2502         _this->gl_config.red_size = value;
  2503         break;
  2504     case SDL_GL_GREEN_SIZE:
  2505         _this->gl_config.green_size = value;
  2506         break;
  2507     case SDL_GL_BLUE_SIZE:
  2508         _this->gl_config.blue_size = value;
  2509         break;
  2510     case SDL_GL_ALPHA_SIZE:
  2511         _this->gl_config.alpha_size = value;
  2512         break;
  2513     case SDL_GL_DOUBLEBUFFER:
  2514         _this->gl_config.double_buffer = value;
  2515         break;
  2516     case SDL_GL_BUFFER_SIZE:
  2517         _this->gl_config.buffer_size = value;
  2518         break;
  2519     case SDL_GL_DEPTH_SIZE:
  2520         _this->gl_config.depth_size = value;
  2521         break;
  2522     case SDL_GL_STENCIL_SIZE:
  2523         _this->gl_config.stencil_size = value;
  2524         break;
  2525     case SDL_GL_ACCUM_RED_SIZE:
  2526         _this->gl_config.accum_red_size = value;
  2527         break;
  2528     case SDL_GL_ACCUM_GREEN_SIZE:
  2529         _this->gl_config.accum_green_size = value;
  2530         break;
  2531     case SDL_GL_ACCUM_BLUE_SIZE:
  2532         _this->gl_config.accum_blue_size = value;
  2533         break;
  2534     case SDL_GL_ACCUM_ALPHA_SIZE:
  2535         _this->gl_config.accum_alpha_size = value;
  2536         break;
  2537     case SDL_GL_STEREO:
  2538         _this->gl_config.stereo = value;
  2539         break;
  2540     case SDL_GL_MULTISAMPLEBUFFERS:
  2541         _this->gl_config.multisamplebuffers = value;
  2542         break;
  2543     case SDL_GL_MULTISAMPLESAMPLES:
  2544         _this->gl_config.multisamplesamples = value;
  2545         break;
  2546     case SDL_GL_ACCELERATED_VISUAL:
  2547         _this->gl_config.accelerated = value;
  2548         break;
  2549     case SDL_GL_RETAINED_BACKING:
  2550         _this->gl_config.retained_backing = value;
  2551         break;
  2552     default:
  2553         SDL_SetError("Unknown OpenGL attribute");
  2554         retval = -1;
  2555         break;
  2556     }
  2557     return retval;
  2558 #else
  2559     SDL_Unsupported();
  2560     return -1;
  2561 #endif /* SDL_VIDEO_OPENGL */
  2562 }
  2563 
  2564 int
  2565 SDL_GL_GetAttribute(SDL_GLattr attr, int *value)
  2566 {
  2567 #if SDL_VIDEO_OPENGL || SDL_VIDEO_OPENGL_ES
  2568     void (APIENTRY * glGetIntegervFunc) (GLenum pname, GLint * params);
  2569     GLenum attrib = 0;
  2570 
  2571     glGetIntegervFunc = SDL_GL_GetProcAddress("glGetIntegerv");
  2572     if (!glGetIntegervFunc) {
  2573         return -1;
  2574     }
  2575     switch (attr) {
  2576     case SDL_GL_RETAINED_BACKING:
  2577         *value = _this->gl_config.retained_backing;
  2578         return 0;
  2579     case SDL_GL_RED_SIZE:
  2580         attrib = GL_RED_BITS;
  2581         break;
  2582     case SDL_GL_BLUE_SIZE:
  2583         attrib = GL_BLUE_BITS;
  2584         break;
  2585     case SDL_GL_GREEN_SIZE:
  2586         attrib = GL_GREEN_BITS;
  2587         break;
  2588     case SDL_GL_ALPHA_SIZE:
  2589         attrib = GL_ALPHA_BITS;
  2590         break;
  2591     case SDL_GL_DOUBLEBUFFER:
  2592 #ifndef SDL_VIDEO_OPENGL_ES
  2593         attrib = GL_DOUBLEBUFFER;
  2594         break;
  2595 #else
  2596         /*
  2597          * I believe double buffering is the only option in OpenGL ES
  2598          * -- in any case, GL_DOUBLEBUFFER doesn't exist
  2599          */
  2600         *value = 1;
  2601         return 0;
  2602 #endif
  2603     case SDL_GL_DEPTH_SIZE:
  2604         attrib = GL_DEPTH_BITS;
  2605         break;
  2606     case SDL_GL_STENCIL_SIZE:
  2607         attrib = GL_STENCIL_BITS;
  2608         break;
  2609 #ifndef SDL_VIDEO_OPENGL_ES
  2610     case SDL_GL_ACCUM_RED_SIZE:
  2611         attrib = GL_ACCUM_RED_BITS;
  2612         break;
  2613     case SDL_GL_ACCUM_GREEN_SIZE:
  2614         attrib = GL_ACCUM_GREEN_BITS;
  2615         break;
  2616     case SDL_GL_ACCUM_BLUE_SIZE:
  2617         attrib = GL_ACCUM_BLUE_BITS;
  2618         break;
  2619     case SDL_GL_ACCUM_ALPHA_SIZE:
  2620         attrib = GL_ACCUM_ALPHA_BITS;
  2621         break;
  2622     case SDL_GL_STEREO:
  2623         attrib = GL_STEREO;
  2624         break;
  2625 #else
  2626     case SDL_GL_ACCUM_RED_SIZE:
  2627     case SDL_GL_ACCUM_GREEN_SIZE:
  2628     case SDL_GL_ACCUM_BLUE_SIZE:
  2629     case SDL_GL_ACCUM_ALPHA_SIZE:
  2630     case SDL_GL_STEREO:
  2631         /* none of these are supported in OpenGL ES */
  2632         *value = 0;
  2633         return 0;
  2634 #endif
  2635     case SDL_GL_MULTISAMPLEBUFFERS:
  2636 #ifndef SDL_VIDEO_OPENGL_ES
  2637         attrib = GL_SAMPLE_BUFFERS_ARB;
  2638 #else
  2639         attrib = GL_SAMPLE_BUFFERS;
  2640 #endif
  2641         break;
  2642     case SDL_GL_MULTISAMPLESAMPLES:
  2643 #ifndef SDL_VIDEO_OPENGL_ES
  2644         attrib = GL_SAMPLES_ARB;
  2645 #else
  2646         attrib = GL_SAMPLES;
  2647 #endif
  2648         break;
  2649     case SDL_GL_BUFFER_SIZE:
  2650         {
  2651             GLint bits = 0;
  2652             GLint component;
  2653 
  2654             /*
  2655              * there doesn't seem to be a single flag in OpenGL
  2656              * for this!
  2657              */
  2658             glGetIntegervFunc(GL_RED_BITS, &component);
  2659             bits += component;
  2660             glGetIntegervFunc(GL_GREEN_BITS, &component);
  2661             bits += component;
  2662             glGetIntegervFunc(GL_BLUE_BITS, &component);
  2663             bits += component;
  2664             glGetIntegervFunc(GL_ALPHA_BITS, &component);
  2665             bits += component;
  2666 
  2667             *value = bits;
  2668             return 0;
  2669         }
  2670     case SDL_GL_ACCELERATED_VISUAL:
  2671         {
  2672             /* FIXME: How do we get this information? */
  2673             *value = (_this->gl_config.accelerated != 0);
  2674             return 0;
  2675         }
  2676     default:
  2677         SDL_SetError("Unknown OpenGL attribute");
  2678         return -1;
  2679     }
  2680 
  2681     glGetIntegervFunc(attrib, (GLint *) value);
  2682     return 0;
  2683 #else
  2684     SDL_Unsupported();
  2685     return -1;
  2686 #endif /* SDL_VIDEO_OPENGL */
  2687 }
  2688 
  2689 SDL_GLContext
  2690 SDL_GL_CreateContext(SDL_WindowID windowID)
  2691 {
  2692     SDL_Window *window = SDL_GetWindowFromID(windowID);
  2693 
  2694     if (!window) {
  2695         return NULL;
  2696     }
  2697     if (!(window->flags & SDL_WINDOW_OPENGL)) {
  2698         SDL_SetError("The specified window isn't an OpenGL window");
  2699         return NULL;
  2700     }
  2701     return _this->GL_CreateContext(_this, window);
  2702 }
  2703 
  2704 int
  2705 SDL_GL_MakeCurrent(SDL_WindowID windowID, SDL_GLContext context)
  2706 {
  2707     SDL_Window *window = SDL_GetWindowFromID(windowID);
  2708 
  2709     if (window && !(window->flags & SDL_WINDOW_OPENGL)) {
  2710         SDL_SetError("The specified window isn't an OpenGL window");
  2711         return -1;
  2712     }
  2713     if (!context) {
  2714         window = NULL;
  2715     }
  2716     return _this->GL_MakeCurrent(_this, window, context);
  2717 }
  2718 
  2719 int
  2720 SDL_GL_SetSwapInterval(int interval)
  2721 {
  2722     if (!_this) {
  2723         SDL_UninitializedVideo();
  2724         return -1;
  2725     }
  2726     if (_this->GL_SetSwapInterval) {
  2727         return _this->GL_SetSwapInterval(_this, interval);
  2728     } else {
  2729         SDL_SetError("Setting the swap interval is not supported");
  2730         return -1;
  2731     }
  2732 }
  2733 
  2734 int
  2735 SDL_GL_GetSwapInterval(void)
  2736 {
  2737     if (!_this) {
  2738         SDL_UninitializedVideo();
  2739         return -1;
  2740     }
  2741     if (_this->GL_GetSwapInterval) {
  2742         return _this->GL_GetSwapInterval(_this);
  2743     } else {
  2744         SDL_SetError("Getting the swap interval is not supported");
  2745         return -1;
  2746     }
  2747 }
  2748 
  2749 void
  2750 SDL_GL_SwapWindow(SDL_WindowID windowID)
  2751 {
  2752     SDL_Window *window = SDL_GetWindowFromID(windowID);
  2753 
  2754     if (!window) {
  2755         return;
  2756     }
  2757     if (!(window->flags & SDL_WINDOW_OPENGL)) {
  2758         SDL_SetError("The specified window isn't an OpenGL window");
  2759         return;
  2760     }
  2761     _this->GL_SwapWindow(_this, window);
  2762 }
  2763 
  2764 void
  2765 SDL_GL_DeleteContext(SDL_GLContext context)
  2766 {
  2767     if (!_this || !context) {
  2768         return;
  2769     }
  2770     _this->GL_MakeCurrent(_this, NULL, NULL);
  2771     _this->GL_DeleteContext(_this, context);
  2772 }
  2773 
  2774 #if 0                           // FIXME
  2775 /*
  2776  * Utility function used by SDL_WM_SetIcon(); flags & 1 for color key, flags
  2777  * & 2 for alpha channel.
  2778  */
  2779 static void
  2780 CreateMaskFromColorKeyOrAlpha(SDL_Surface * icon, Uint8 * mask, int flags)
  2781 {
  2782     int x, y;
  2783     Uint32 colorkey;
  2784 #define SET_MASKBIT(icon, x, y, mask) \
  2785 	mask[(y*((icon->w+7)/8))+(x/8)] &= ~(0x01<<(7-(x%8)))
  2786 
  2787     colorkey = icon->format->colorkey;
  2788     switch (icon->format->BytesPerPixel) {
  2789     case 1:
  2790         {
  2791             Uint8 *pixels;
  2792             for (y = 0; y < icon->h; ++y) {
  2793                 pixels = (Uint8 *) icon->pixels + y * icon->pitch;
  2794                 for (x = 0; x < icon->w; ++x) {
  2795                     if (*pixels++ == colorkey) {
  2796                         SET_MASKBIT(icon, x, y, mask);
  2797                     }
  2798                 }
  2799             }
  2800         }
  2801         break;
  2802 
  2803     case 2:
  2804         {
  2805             Uint16 *pixels;
  2806             for (y = 0; y < icon->h; ++y) {
  2807                 pixels = (Uint16 *) icon->pixels + y * icon->pitch / 2;
  2808                 for (x = 0; x < icon->w; ++x) {
  2809                     if ((flags & 1) && *pixels == colorkey) {
  2810                         SET_MASKBIT(icon, x, y, mask);
  2811                     } else if ((flags & 2)
  2812                                && (*pixels & icon->format->Amask) == 0) {
  2813                         SET_MASKBIT(icon, x, y, mask);
  2814                     }
  2815                     pixels++;
  2816                 }
  2817             }
  2818         }
  2819         break;
  2820 
  2821     case 4:
  2822         {
  2823             Uint32 *pixels;
  2824             for (y = 0; y < icon->h; ++y) {
  2825                 pixels = (Uint32 *) icon->pixels + y * icon->pitch / 4;
  2826                 for (x = 0; x < icon->w; ++x) {
  2827                     if ((flags & 1) && *pixels == colorkey) {
  2828                         SET_MASKBIT(icon, x, y, mask);
  2829                     } else if ((flags & 2)
  2830                                && (*pixels & icon->format->Amask) == 0) {
  2831                         SET_MASKBIT(icon, x, y, mask);
  2832                     }
  2833                     pixels++;
  2834                 }
  2835             }
  2836         }
  2837         break;
  2838     }
  2839 }
  2840 
  2841 /*
  2842  * Sets the window manager icon for the display window.
  2843  */
  2844 void
  2845 SDL_WM_SetIcon(SDL_Surface * icon, Uint8 * mask)
  2846 {
  2847     if (icon && _this->SetIcon) {
  2848         /* Generate a mask if necessary, and create the icon! */
  2849         if (mask == NULL) {
  2850             int mask_len = icon->h * (icon->w + 7) / 8;
  2851             int flags = 0;
  2852             mask = (Uint8 *) SDL_malloc(mask_len);
  2853             if (mask == NULL) {
  2854                 return;
  2855             }
  2856             SDL_memset(mask, ~0, mask_len);
  2857             if (icon->flags & SDL_SRCCOLORKEY)
  2858                 flags |= 1;
  2859             if (icon->flags & SDL_SRCALPHA)
  2860                 flags |= 2;
  2861             if (flags) {
  2862                 CreateMaskFromColorKeyOrAlpha(icon, mask, flags);
  2863             }
  2864             _this->SetIcon(_this, icon, mask);
  2865             SDL_free(mask);
  2866         } else {
  2867             _this->SetIcon(_this, icon, mask);
  2868         }
  2869     }
  2870 }
  2871 #endif
  2872 
  2873 SDL_bool
  2874 SDL_GetWindowWMInfo(SDL_WindowID windowID, struct SDL_SysWMinfo *info)
  2875 {
  2876     SDL_Window *window = SDL_GetWindowFromID(windowID);
  2877 
  2878     if (!window || !_this->GetWindowWMInfo) {
  2879         return SDL_FALSE;
  2880     }
  2881     return (_this->GetWindowWMInfo(_this, window, info));
  2882 }
  2883 
  2884 /* vi: set ts=4 sw=4 expandtab: */