SDL  2.0
SDL_surface.c File Reference
#include "../SDL_internal.h"
#include "SDL_video.h"
#include "SDL_sysvideo.h"
#include "SDL_blit.h"
#include "SDL_RLEaccel_c.h"
#include "SDL_pixels_c.h"
#include "SDL_yuv_c.h"
+ Include dependency graph for SDL_surface.c:

Go to the source code of this file.

Functions

 SDL_COMPILE_TIME_ASSERT (surface_size_assumptions, sizeof(int)==sizeof(Sint32) &&sizeof(size_t) >=sizeof(Sint32))
 
static int SDL_CalculatePitch (Uint32 format, int width)
 
SDL_SurfaceSDL_CreateRGBSurfaceWithFormat (Uint32 flags, int width, int height, int depth, Uint32 format)
 
SDL_SurfaceSDL_CreateRGBSurface (Uint32 flags, int width, int height, int depth, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
 
SDL_SurfaceSDL_CreateRGBSurfaceFrom (void *pixels, int width, int height, int depth, int pitch, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
 
SDL_SurfaceSDL_CreateRGBSurfaceWithFormatFrom (void *pixels, int width, int height, int depth, int pitch, Uint32 format)
 
int SDL_SetSurfacePalette (SDL_Surface *surface, SDL_Palette *palette)
 Set the palette used by a surface. More...
 
int SDL_SetSurfaceRLE (SDL_Surface *surface, int flag)
 Sets the RLE acceleration hint for a surface. More...
 
int SDL_SetColorKey (SDL_Surface *surface, int flag, Uint32 key)
 Sets the color key (transparent pixel) in a blittable surface. More...
 
SDL_bool SDL_HasColorKey (SDL_Surface *surface)
 Returns whether the surface has a color key. More...
 
int SDL_GetColorKey (SDL_Surface *surface, Uint32 *key)
 Gets the color key (transparent pixel) in a blittable surface. More...
 
static void SDL_ConvertColorkeyToAlpha (SDL_Surface *surface, SDL_bool ignore_alpha)
 
int SDL_SetSurfaceColorMod (SDL_Surface *surface, Uint8 r, Uint8 g, Uint8 b)
 Set an additional color value used in blit operations. More...
 
int SDL_GetSurfaceColorMod (SDL_Surface *surface, Uint8 *r, Uint8 *g, Uint8 *b)
 Get the additional color value used in blit operations. More...
 
int SDL_SetSurfaceAlphaMod (SDL_Surface *surface, Uint8 alpha)
 Set an additional alpha value used in blit operations. More...
 
int SDL_GetSurfaceAlphaMod (SDL_Surface *surface, Uint8 *alpha)
 Get the additional alpha value used in blit operations. More...
 
int SDL_SetSurfaceBlendMode (SDL_Surface *surface, SDL_BlendMode blendMode)
 Set the blend mode used for blit operations. More...
 
int SDL_GetSurfaceBlendMode (SDL_Surface *surface, SDL_BlendMode *blendMode)
 Get the blend mode used for blit operations. More...
 
SDL_bool SDL_SetClipRect (SDL_Surface *surface, const SDL_Rect *rect)
 
void SDL_GetClipRect (SDL_Surface *surface, SDL_Rect *rect)
 
int SDL_LowerBlit (SDL_Surface *src, SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect)
 
int SDL_UpperBlit (SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect)
 
int SDL_UpperBlitScaled (SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect)
 
int SDL_LowerBlitScaled (SDL_Surface *src, SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect)
 
int SDL_LockSurface (SDL_Surface *surface)
 Sets up a surface for directly accessing the pixels. More...
 
void SDL_UnlockSurface (SDL_Surface *surface)
 
SDL_SurfaceSDL_DuplicateSurface (SDL_Surface *surface)
 
SDL_SurfaceSDL_ConvertSurface (SDL_Surface *surface, const SDL_PixelFormat *format, Uint32 flags)
 
SDL_SurfaceSDL_ConvertSurfaceFormat (SDL_Surface *surface, Uint32 pixel_format, Uint32 flags)
 
static SDL_INLINE SDL_bool SDL_CreateSurfaceOnStack (int width, int height, Uint32 pixel_format, void *pixels, int pitch, SDL_Surface *surface, SDL_PixelFormat *format, SDL_BlitMap *blitmap)
 
int SDL_ConvertPixels (int width, int height, Uint32 src_format, const void *src, int src_pitch, Uint32 dst_format, void *dst, int dst_pitch)
 Copy a block of pixels of one format to another format. More...
 
void SDL_FreeSurface (SDL_Surface *surface)
 

Function Documentation

◆ SDL_CalculatePitch()

static int SDL_CalculatePitch ( Uint32  format,
int  width 
)
static

Definition at line 41 of file SDL_surface.c.

42 {
43  int pitch;
44 
46  pitch = (width * SDL_BYTESPERPIXEL(format));
47  } else {
48  pitch = ((width * SDL_BITSPERPIXEL(format)) + 7) / 8;
49  }
50  pitch = (pitch + 3) & ~3; /* 4-byte aligning for speed */
51  return pitch;
52 }

References SDL_BITSPERPIXEL, SDL_BYTESPERPIXEL, and SDL_ISPIXELFORMAT_FOURCC.

Referenced by SDL_CreateRGBSurfaceWithFormat().

◆ SDL_COMPILE_TIME_ASSERT()

SDL_COMPILE_TIME_ASSERT ( surface_size_assumptions  ,
sizeof(int)  = =sizeof(Sint32) &&sizeof(size_t) >=sizeof(Sint32) 
)

◆ SDL_ConvertColorkeyToAlpha()

static void SDL_ConvertColorkeyToAlpha ( SDL_Surface surface,
SDL_bool  ignore_alpha 
)
static

Definition at line 308 of file SDL_surface.c.

309 {
310  int x, y;
311 
312  if (!surface) {
313  return;
314  }
315 
316  if (!(surface->map->info.flags & SDL_COPY_COLORKEY) ||
317  !surface->format->Amask) {
318  return;
319  }
320 
322 
323  switch (surface->format->BytesPerPixel) {
324  case 2:
325  {
326  Uint16 *row, *spot;
327  Uint16 ckey = (Uint16) surface->map->info.colorkey;
328  Uint16 mask = (Uint16) (~surface->format->Amask);
329 
330  /* Ignore, or not, alpha in colorkey comparison */
331  if (ignore_alpha) {
332  ckey &= mask;
333  row = (Uint16 *) surface->pixels;
334  for (y = surface->h; y--;) {
335  spot = row;
336  for (x = surface->w; x--;) {
337  if ((*spot & mask) == ckey) {
338  *spot &= mask;
339  }
340  ++spot;
341  }
342  row += surface->pitch / 2;
343  }
344  } else {
345  row = (Uint16 *) surface->pixels;
346  for (y = surface->h; y--;) {
347  spot = row;
348  for (x = surface->w; x--;) {
349  if (*spot == ckey) {
350  *spot &= mask;
351  }
352  ++spot;
353  }
354  row += surface->pitch / 2;
355  }
356  }
357  }
358  break;
359  case 3:
360  /* FIXME */
361  break;
362  case 4:
363  {
364  Uint32 *row, *spot;
365  Uint32 ckey = surface->map->info.colorkey;
366  Uint32 mask = ~surface->format->Amask;
367 
368  /* Ignore, or not, alpha in colorkey comparison */
369  if (ignore_alpha) {
370  ckey &= mask;
371  row = (Uint32 *) surface->pixels;
372  for (y = surface->h; y--;) {
373  spot = row;
374  for (x = surface->w; x--;) {
375  if ((*spot & mask) == ckey) {
376  *spot &= mask;
377  }
378  ++spot;
379  }
380  row += surface->pitch / 4;
381  }
382  } else {
383  row = (Uint32 *) surface->pixels;
384  for (y = surface->h; y--;) {
385  spot = row;
386  for (x = surface->w; x--;) {
387  if (*spot == ckey) {
388  *spot &= mask;
389  }
390  ++spot;
391  }
392  row += surface->pitch / 4;
393  }
394  }
395  }
396  break;
397  }
398 
400 
401  SDL_SetColorKey(surface, 0, 0);
403 }

References SDL_BLENDMODE_BLEND, SDL_COPY_COLORKEY, SDL_LockSurface(), SDL_SetColorKey(), SDL_SetSurfaceBlendMode(), and SDL_UnlockSurface().

Referenced by SDL_ConvertSurface().

◆ SDL_ConvertPixels()

int SDL_ConvertPixels ( int  width,
int  height,
Uint32  src_format,
const void src,
int  src_pitch,
Uint32  dst_format,
void dst,
int  dst_pitch 
)

Copy a block of pixels of one format to another format.

Returns
0 on success, or -1 if there was an error

Definition at line 1242 of file SDL_surface.c.

1245 {
1246  SDL_Surface src_surface, dst_surface;
1247  SDL_PixelFormat src_fmt, dst_fmt;
1248  SDL_BlitMap src_blitmap, dst_blitmap;
1249  SDL_Rect rect;
1250  void *nonconst_src = (void *) src;
1251 
1252  /* Check to make sure we are blitting somewhere, so we don't crash */
1253  if (!dst) {
1254  return SDL_InvalidParamError("dst");
1255  }
1256  if (!dst_pitch) {
1257  return SDL_InvalidParamError("dst_pitch");
1258  }
1259 
1260 #if SDL_HAVE_YUV
1261  if (SDL_ISPIXELFORMAT_FOURCC(src_format) && SDL_ISPIXELFORMAT_FOURCC(dst_format)) {
1262  return SDL_ConvertPixels_YUV_to_YUV(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
1263  } else if (SDL_ISPIXELFORMAT_FOURCC(src_format)) {
1264  return SDL_ConvertPixels_YUV_to_RGB(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
1265  } else if (SDL_ISPIXELFORMAT_FOURCC(dst_format)) {
1266  return SDL_ConvertPixels_RGB_to_YUV(width, height, src_format, src, src_pitch, dst_format, dst, dst_pitch);
1267  }
1268 #else
1269  if (SDL_ISPIXELFORMAT_FOURCC(src_format) || SDL_ISPIXELFORMAT_FOURCC(dst_format)) {
1270  SDL_SetError("SDL not built with YUV support");
1271  return -1;
1272  }
1273 #endif
1274 
1275  /* Fast path for same format copy */
1276  if (src_format == dst_format) {
1277  int i;
1278  const int bpp = SDL_BYTESPERPIXEL(src_format);
1279  width *= bpp;
1280  for (i = height; i--;) {
1281  SDL_memcpy(dst, src, width);
1282  src = (const Uint8*)src + src_pitch;
1283  dst = (Uint8*)dst + dst_pitch;
1284  }
1285  return 0;
1286  }
1287 
1288  if (!SDL_CreateSurfaceOnStack(width, height, src_format, nonconst_src,
1289  src_pitch,
1290  &src_surface, &src_fmt, &src_blitmap)) {
1291  return -1;
1292  }
1293  if (!SDL_CreateSurfaceOnStack(width, height, dst_format, dst, dst_pitch,
1294  &dst_surface, &dst_fmt, &dst_blitmap)) {
1295  return -1;
1296  }
1297 
1298  /* Set up the rect and go! */
1299  rect.x = 0;
1300  rect.y = 0;
1301  rect.w = width;
1302  rect.h = height;
1303  return SDL_LowerBlit(&src_surface, &rect, &dst_surface, &rect);
1304 }

References bpp, SDL_Rect::h, i, rect, SDL_BYTESPERPIXEL, SDL_ConvertPixels_RGB_to_YUV(), SDL_ConvertPixels_YUV_to_RGB(), SDL_ConvertPixels_YUV_to_YUV(), SDL_CreateSurfaceOnStack(), SDL_InvalidParamError, SDL_ISPIXELFORMAT_FOURCC, SDL_LowerBlit(), SDL_memcpy, SDL_SetError, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

◆ SDL_ConvertSurface()

SDL_Surface* SDL_ConvertSurface ( SDL_Surface src,
const SDL_PixelFormat fmt,
Uint32  flags 
)

Creates a new surface of the specified format, and then copies and maps the given surface to it so the blit of the converted surface will be as fast as possible. If this function fails, it returns NULL.

The flags parameter is passed to SDL_CreateRGBSurface() and has those semantics. You can also pass SDL_RLEACCEL in the flags parameter and SDL will try to RLE accelerate colorkey and alpha blits in the resulting surface.

Definition at line 957 of file SDL_surface.c.

959 {
960  SDL_Surface *convert;
961  Uint32 copy_flags;
962  SDL_Color copy_color;
963  SDL_Rect bounds;
964  int ret;
965  SDL_bool palette_ck_transform = SDL_FALSE;
966  int palette_ck_value = 0;
967  SDL_bool palette_has_alpha = SDL_FALSE;
968  Uint8 *palette_saved_alpha = NULL;
969 
970  if (!surface) {
971  SDL_InvalidParamError("surface");
972  return NULL;
973  }
974  if (!format) {
975  SDL_InvalidParamError("format");
976  return NULL;
977  }
978 
979  /* Check for empty destination palette! (results in empty image) */
980  if (format->palette != NULL) {
981  int i;
982  for (i = 0; i < format->palette->ncolors; ++i) {
983  if ((format->palette->colors[i].r != 0xFF) ||
984  (format->palette->colors[i].g != 0xFF) ||
985  (format->palette->colors[i].b != 0xFF))
986  break;
987  }
988  if (i == format->palette->ncolors) {
989  SDL_SetError("Empty destination palette");
990  return (NULL);
991  }
992  }
993 
994  /* Create a new surface with the desired format */
995  convert = SDL_CreateRGBSurface(flags, surface->w, surface->h,
996  format->BitsPerPixel, format->Rmask,
997  format->Gmask, format->Bmask,
998  format->Amask);
999  if (convert == NULL) {
1000  return (NULL);
1001  }
1002 
1003  /* Copy the palette if any */
1004  if (format->palette && convert->format->palette) {
1005  SDL_memcpy(convert->format->palette->colors,
1006  format->palette->colors,
1007  format->palette->ncolors * sizeof(SDL_Color));
1008  convert->format->palette->ncolors = format->palette->ncolors;
1009  }
1010 
1011  /* Save the original copy flags */
1012  copy_flags = surface->map->info.flags;
1013  copy_color.r = surface->map->info.r;
1014  copy_color.g = surface->map->info.g;
1015  copy_color.b = surface->map->info.b;
1016  copy_color.a = surface->map->info.a;
1017  surface->map->info.r = 0xFF;
1018  surface->map->info.g = 0xFF;
1019  surface->map->info.b = 0xFF;
1020  surface->map->info.a = 0xFF;
1021  surface->map->info.flags = 0;
1022  SDL_InvalidateMap(surface->map);
1023 
1024  /* Copy over the image data */
1025  bounds.x = 0;
1026  bounds.y = 0;
1027  bounds.w = surface->w;
1028  bounds.h = surface->h;
1029 
1030  /* Source surface has a palette with no real alpha (0 or OPAQUE).
1031  * Destination format has alpha.
1032  * -> set alpha channel to be opaque */
1033  if (surface->format->palette && format->Amask) {
1034  SDL_bool set_opaque = SDL_FALSE;
1035  {
1036  int i;
1037  for (i = 0; i < surface->format->palette->ncolors; i++) {
1038  Uint8 alpha_value = surface->format->palette->colors[i].a;
1039 
1040  if (alpha_value != 0 && alpha_value != SDL_ALPHA_OPAQUE) {
1041  /* Palette has at least one alpha value. Don't do anything */
1042  set_opaque = SDL_FALSE;
1043  palette_has_alpha = SDL_TRUE;
1044  break;
1045  }
1046 
1047  if (alpha_value == 0) {
1048  set_opaque = SDL_TRUE;
1049  }
1050  }
1051  }
1052 
1053  /* Set opaque and backup palette alpha values */
1054  if (set_opaque) {
1055  int i;
1056  palette_saved_alpha = SDL_stack_alloc(Uint8, surface->format->palette->ncolors);
1057  for (i = 0; i < surface->format->palette->ncolors; i++) {
1058  palette_saved_alpha[i] = surface->format->palette->colors[i].a;
1059  surface->format->palette->colors[i].a = SDL_ALPHA_OPAQUE;
1060  }
1061  }
1062  }
1063 
1064  /* Transform colorkey to alpha. for cases where source palette has duplicate values, and colorkey is one of them */
1065  if (copy_flags & SDL_COPY_COLORKEY) {
1066  if (surface->format->palette && !format->palette) {
1067  palette_ck_transform = SDL_TRUE;
1068  palette_has_alpha = SDL_TRUE;
1069  palette_ck_value = surface->format->palette->colors[surface->map->info.colorkey].a;
1070  surface->format->palette->colors[surface->map->info.colorkey].a = SDL_ALPHA_TRANSPARENT;
1071  }
1072  }
1073 
1074  ret = SDL_LowerBlit(surface, &bounds, convert, &bounds);
1075 
1076  /* Restore colorkey alpha value */
1077  if (palette_ck_transform) {
1078  surface->format->palette->colors[surface->map->info.colorkey].a = palette_ck_value;
1079  }
1080 
1081  /* Restore palette alpha values */
1082  if (palette_saved_alpha) {
1083  int i;
1084  for (i = 0; i < surface->format->palette->ncolors; i++) {
1085  surface->format->palette->colors[i].a = palette_saved_alpha[i];
1086  }
1087  SDL_stack_free(palette_saved_alpha);
1088  }
1089 
1090  /* Clean up the original surface, and update converted surface */
1091  convert->map->info.r = copy_color.r;
1092  convert->map->info.g = copy_color.g;
1093  convert->map->info.b = copy_color.b;
1094  convert->map->info.a = copy_color.a;
1095  convert->map->info.flags =
1096  (copy_flags &
1100  surface->map->info.r = copy_color.r;
1101  surface->map->info.g = copy_color.g;
1102  surface->map->info.b = copy_color.b;
1103  surface->map->info.a = copy_color.a;
1104  surface->map->info.flags = copy_flags;
1105  SDL_InvalidateMap(surface->map);
1106 
1107  /* SDL_LowerBlit failed, and so the conversion */
1108  if (ret < 0) {
1109  SDL_FreeSurface(convert);
1110  return NULL;
1111  }
1112 
1113  if (copy_flags & SDL_COPY_COLORKEY) {
1114  SDL_bool set_colorkey_by_color = SDL_FALSE;
1115 
1116  if (surface->format->palette) {
1117  if (format->palette &&
1118  surface->format->palette->ncolors <= format->palette->ncolors &&
1119  (SDL_memcmp(surface->format->palette->colors, format->palette->colors,
1120  surface->format->palette->ncolors * sizeof(SDL_Color)) == 0)) {
1121  /* The palette is identical, just set the same colorkey */
1122  SDL_SetColorKey(convert, 1, surface->map->info.colorkey);
1123  } else if (!format->palette) {
1124  /* Was done by 'palette_ck_transform' */
1125  } else {
1126  set_colorkey_by_color = SDL_TRUE;
1127  }
1128  } else {
1129  set_colorkey_by_color = SDL_TRUE;
1130  }
1131 
1132  if (set_colorkey_by_color) {
1133  SDL_Surface *tmp;
1134  SDL_Surface *tmp2;
1135  int converted_colorkey = 0;
1136 
1137  /* Create a dummy surface to get the colorkey converted */
1138  tmp = SDL_CreateRGBSurface(0, 1, 1,
1139  surface->format->BitsPerPixel, surface->format->Rmask,
1140  surface->format->Gmask, surface->format->Bmask,
1141  surface->format->Amask);
1142 
1143  /* Share the palette, if any */
1144  if (surface->format->palette) {
1145  SDL_SetSurfacePalette(tmp, surface->format->palette);
1146  }
1147 
1148  SDL_FillRect(tmp, NULL, surface->map->info.colorkey);
1149 
1150  tmp->map->info.flags &= ~SDL_COPY_COLORKEY;
1151 
1152  /* Convertion of the colorkey */
1153  tmp2 = SDL_ConvertSurface(tmp, format, 0);
1154 
1155  /* Get the converted colorkey */
1156  SDL_memcpy(&converted_colorkey, tmp2->pixels, tmp2->format->BytesPerPixel);
1157 
1158  SDL_FreeSurface(tmp);
1159  SDL_FreeSurface(tmp2);
1160 
1161  /* Set the converted colorkey on the new surface */
1162  SDL_SetColorKey(convert, 1, converted_colorkey);
1163 
1164  /* This is needed when converting for 3D texture upload */
1166  }
1167  }
1168  SDL_SetClipRect(convert, &surface->clip_rect);
1169 
1170  /* Enable alpha blending by default if the new surface has an
1171  * alpha channel or alpha modulation */
1172  if ((surface->format->Amask && format->Amask) ||
1173  (palette_has_alpha && format->Amask) ||
1174  (copy_flags & SDL_COPY_MODULATE_ALPHA)) {
1176  }
1177  if ((copy_flags & SDL_COPY_RLE_DESIRED) || (flags & SDL_RLEACCEL)) {
1178  SDL_SetSurfaceRLE(convert, SDL_RLEACCEL);
1179  }
1180 
1181  /* We're ready to go! */
1182  return (convert);
1183 }

References SDL_BlitInfo::a, SDL_Color::a, SDL_BlitInfo::b, SDL_Color::b, SDL_PixelFormat::BytesPerPixel, SDL_Surface::clip_rect, SDL_BlitInfo::colorkey, SDL_Palette::colors, SDL_BlitInfo::flags, SDL_Surface::format, SDL_BlitInfo::g, SDL_Color::g, SDL_Rect::h, i, SDL_BlitMap::info, SDL_Surface::map, SDL_Palette::ncolors, NULL, SDL_PixelFormat::palette, SDL_Surface::pixels, SDL_BlitInfo::r, SDL_Color::r, SDL_ALPHA_OPAQUE, SDL_ALPHA_TRANSPARENT, SDL_BLENDMODE_BLEND, SDL_ConvertColorkeyToAlpha(), SDL_COPY_BLEND, SDL_COPY_COLORKEY, SDL_COPY_MODULATE_ALPHA, SDL_COPY_RLE_ALPHAKEY, SDL_COPY_RLE_COLORKEY, SDL_COPY_RLE_DESIRED, SDL_CreateRGBSurface(), SDL_FALSE, SDL_FillRect, SDL_FreeSurface(), SDL_InvalidateMap(), SDL_InvalidParamError, SDL_LowerBlit(), SDL_memcmp, SDL_memcpy, SDL_RLEACCEL, SDL_SetClipRect(), SDL_SetColorKey(), SDL_SetError, SDL_SetSurfaceBlendMode(), SDL_SetSurfacePalette(), SDL_SetSurfaceRLE(), SDL_stack_alloc, SDL_stack_free, SDL_TRUE, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_ConvertSurfaceFormat(), and SDL_DuplicateSurface().

◆ SDL_ConvertSurfaceFormat()

SDL_Surface* SDL_ConvertSurfaceFormat ( SDL_Surface surface,
Uint32  pixel_format,
Uint32  flags 
)

Definition at line 1186 of file SDL_surface.c.

1188 {
1189  SDL_PixelFormat *fmt;
1190  SDL_Surface *convert = NULL;
1191 
1192  fmt = SDL_AllocFormat(pixel_format);
1193  if (fmt) {
1194  convert = SDL_ConvertSurface(surface, fmt, flags);
1195  SDL_FreeFormat(fmt);
1196  }
1197  return convert;
1198 }

References NULL, SDL_AllocFormat, SDL_ConvertSurface(), and SDL_FreeFormat.

◆ SDL_CreateRGBSurface()

SDL_Surface* SDL_CreateRGBSurface ( Uint32  flags,
int  width,
int  height,
int  depth,
Uint32  Rmask,
Uint32  Gmask,
Uint32  Bmask,
Uint32  Amask 
)

Allocate and free an RGB surface.

If the depth is 4 or 8 bits, an empty palette is allocated for the surface. If the depth is greater than 8 bits, the pixel format is set using the flags '[RGB]mask'.

If the function runs out of memory, it will return NULL.

Parameters
flagsThe flags are obsolete and should be set to 0.
widthThe width in pixels of the surface to create.
heightThe height in pixels of the surface to create.
depthThe depth in bits of the surface to create.
RmaskThe red mask of the surface to create.
GmaskThe green mask of the surface to create.
BmaskThe blue mask of the surface to create.
AmaskThe alpha mask of the surface to create.

Definition at line 147 of file SDL_surface.c.

150 {
151  Uint32 format;
152 
153  /* Get the pixel format */
154  format = SDL_MasksToPixelFormatEnum(depth, Rmask, Gmask, Bmask, Amask);
156  SDL_SetError("Unknown pixel format");
157  return NULL;
158  }
159 
161 }

References NULL, SDL_CreateRGBSurfaceWithFormat(), SDL_MasksToPixelFormatEnum, SDL_PIXELFORMAT_UNKNOWN, and SDL_SetError.

Referenced by SDL_ConvertSurface(), and SDL_CreateRGBSurfaceFrom().

◆ SDL_CreateRGBSurfaceFrom()

SDL_Surface* SDL_CreateRGBSurfaceFrom ( void pixels,
int  width,
int  height,
int  depth,
int  pitch,
Uint32  Rmask,
Uint32  Gmask,
Uint32  Bmask,
Uint32  Amask 
)

Definition at line 167 of file SDL_surface.c.

171 {
173 
174  surface = SDL_CreateRGBSurface(0, 0, 0, depth, Rmask, Gmask, Bmask, Amask);
175  if (surface != NULL) {
176  surface->flags |= SDL_PREALLOC;
177  surface->pixels = pixels;
178  surface->w = width;
179  surface->h = height;
180  surface->pitch = pitch;
182  }
183  return surface;
184 }

References NULL, SDL_CreateRGBSurface(), SDL_PREALLOC, and SDL_SetClipRect().

◆ SDL_CreateRGBSurfaceWithFormat()

SDL_Surface* SDL_CreateRGBSurfaceWithFormat ( Uint32  flags,
int  width,
int  height,
int  depth,
Uint32  format 
)

Definition at line 59 of file SDL_surface.c.

61 {
63 
64  /* The flags are no longer used, make the compiler happy */
65  (void)flags;
66 
67  /* Allocate the surface */
68  surface = (SDL_Surface *) SDL_calloc(1, sizeof(*surface));
69  if (surface == NULL) {
71  return NULL;
72  }
73 
74  surface->format = SDL_AllocFormat(format);
75  if (!surface->format) {
77  return NULL;
78  }
79  surface->w = width;
80  surface->h = height;
83 
84  if (SDL_ISPIXELFORMAT_INDEXED(surface->format->format)) {
85  SDL_Palette *palette =
86  SDL_AllocPalette((1 << surface->format->BitsPerPixel));
87  if (!palette) {
89  return NULL;
90  }
91  if (palette->ncolors == 2) {
92  /* Create a black and white bitmap palette */
93  palette->colors[0].r = 0xFF;
94  palette->colors[0].g = 0xFF;
95  palette->colors[0].b = 0xFF;
96  palette->colors[1].r = 0x00;
97  palette->colors[1].g = 0x00;
98  palette->colors[1].b = 0x00;
99  }
100  SDL_SetSurfacePalette(surface, palette);
101  SDL_FreePalette(palette);
102  }
103 
104  /* Get the pixels */
105  if (surface->w && surface->h) {
106  /* Assumptions checked in surface_size_assumptions assert above */
107  Sint64 size = ((Sint64)surface->h * surface->pitch);
109  /* Overflow... */
111  SDL_OutOfMemory();
112  return NULL;
113  }
114 
115  surface->pixels = SDL_SIMDAlloc((size_t)size);
116  if (!surface->pixels) {
118  SDL_OutOfMemory();
119  return NULL;
120  }
121  surface->flags |= SDL_SIMD_ALIGNED;
122  /* This is important for bitmaps */
123  SDL_memset(surface->pixels, 0, surface->h * surface->pitch);
124  }
125 
126  /* Allocate an empty mapping */
127  surface->map = SDL_AllocBlitMap();
128  if (!surface->map) {
130  return NULL;
131  }
132 
133  /* By default surface with an alpha mask are set up for blending */
134  if (surface->format->Amask) {
136  }
137 
138  /* The surface is ready to go */
139  surface->refcount = 1;
140  return surface;
141 }

References SDL_Color::b, SDL_Palette::colors, SDL_Color::g, SDL_Palette::ncolors, NULL, SDL_Color::r, SDL_AllocBlitMap(), SDL_AllocFormat, SDL_AllocPalette, SDL_BLENDMODE_BLEND, SDL_CalculatePitch(), SDL_calloc, SDL_FreePalette, SDL_FreeSurface(), SDL_ISPIXELFORMAT_INDEXED, SDL_MAX_SINT32, SDL_memset, SDL_OutOfMemory, SDL_SetClipRect(), SDL_SetSurfaceBlendMode(), SDL_SetSurfacePalette(), SDL_SIMD_ALIGNED, SDL_SIMDAlloc, and void.

Referenced by SDL_CreateRGBSurface(), and SDL_CreateRGBSurfaceWithFormatFrom().

◆ SDL_CreateRGBSurfaceWithFormatFrom()

SDL_Surface* SDL_CreateRGBSurfaceWithFormatFrom ( void pixels,
int  width,
int  height,
int  depth,
int  pitch,
Uint32  format 
)

Definition at line 191 of file SDL_surface.c.

194 {
196 
198  if (surface != NULL) {
199  surface->flags |= SDL_PREALLOC;
200  surface->pixels = pixels;
201  surface->w = width;
202  surface->h = height;
203  surface->pitch = pitch;
205  }
206  return surface;
207 }

References NULL, SDL_CreateRGBSurfaceWithFormat(), SDL_PREALLOC, and SDL_SetClipRect().

◆ SDL_CreateSurfaceOnStack()

static SDL_INLINE SDL_bool SDL_CreateSurfaceOnStack ( int  width,
int  height,
Uint32  pixel_format,
void pixels,
int  pitch,
SDL_Surface surface,
SDL_PixelFormat format,
SDL_BlitMap blitmap 
)
static

Definition at line 1204 of file SDL_surface.c.

1207 {
1208  if (SDL_ISPIXELFORMAT_INDEXED(pixel_format)) {
1209  SDL_SetError("Indexed pixel formats not supported");
1210  return SDL_FALSE;
1211  }
1212  if (SDL_InitFormat(format, pixel_format) < 0) {
1213  return SDL_FALSE;
1214  }
1215 
1216  SDL_zerop(surface);
1217  surface->flags = SDL_PREALLOC;
1218  surface->format = format;
1219  surface->pixels = pixels;
1220  surface->w = width;
1221  surface->h = height;
1222  surface->pitch = pitch;
1223  /* We don't actually need to set up the clip rect for our purposes */
1224  /* SDL_SetClipRect(surface, NULL); */
1225 
1226  /* Allocate an empty mapping */
1227  SDL_zerop(blitmap);
1228  blitmap->info.r = 0xFF;
1229  blitmap->info.g = 0xFF;
1230  blitmap->info.b = 0xFF;
1231  blitmap->info.a = 0xFF;
1232  surface->map = blitmap;
1233 
1234  /* The surface is ready to go */
1235  surface->refcount = 1;
1236  return SDL_TRUE;
1237 }

References SDL_BlitInfo::a, SDL_BlitInfo::b, SDL_BlitInfo::g, SDL_BlitMap::info, SDL_BlitInfo::r, SDL_FALSE, SDL_InitFormat(), SDL_ISPIXELFORMAT_INDEXED, SDL_PREALLOC, SDL_SetError, SDL_TRUE, and SDL_zerop.

Referenced by SDL_ConvertPixels().

◆ SDL_DuplicateSurface()

SDL_Surface* SDL_DuplicateSurface ( SDL_Surface surface)

Definition at line 948 of file SDL_surface.c.

949 {
950  return SDL_ConvertSurface(surface, surface->format, surface->flags);
951 }

References SDL_ConvertSurface().

◆ SDL_FreeSurface()

void SDL_FreeSurface ( SDL_Surface surface)

Definition at line 1310 of file SDL_surface.c.

1311 {
1312  if (surface == NULL) {
1313  return;
1314  }
1315  if (surface->flags & SDL_DONTFREE) {
1316  return;
1317  }
1318  SDL_InvalidateMap(surface->map);
1319 
1320  if (--surface->refcount > 0) {
1321  return;
1322  }
1323  while (surface->locked > 0) {
1325  }
1326 #if SDL_HAVE_RLE
1327  if (surface->flags & SDL_RLEACCEL) {
1329  }
1330 #endif
1331  if (surface->format) {
1333  SDL_FreeFormat(surface->format);
1334  surface->format = NULL;
1335  }
1336  if (surface->flags & SDL_PREALLOC) {
1337  /* Don't free */
1338  } else if (surface->flags & SDL_SIMD_ALIGNED) {
1339  /* Free aligned */
1340  SDL_SIMDFree(surface->pixels);
1341  } else {
1342  /* Normal */
1343  SDL_free(surface->pixels);
1344  }
1345  if (surface->map) {
1346  SDL_FreeBlitMap(surface->map);
1347  }
1348  SDL_free(surface);
1349 }

References NULL, SDL_DONTFREE, SDL_free, SDL_FreeBlitMap(), SDL_FreeFormat, SDL_InvalidateMap(), SDL_PREALLOC, SDL_RLEACCEL, SDL_SetSurfacePalette(), SDL_SIMD_ALIGNED, SDL_SIMDFree, SDL_UnlockSurface(), and SDL_UnRLESurface().

Referenced by SDL_ConvertSurface(), and SDL_CreateRGBSurfaceWithFormat().

◆ SDL_GetClipRect()

void SDL_GetClipRect ( SDL_Surface surface,
SDL_Rect rect 
)

Gets the clipping rectangle for the destination surface in a blit.

rect must be a pointer to a valid rectangle which will be filled with the correct values.

Definition at line 583 of file SDL_surface.c.

584 {
585  if (surface && rect) {
586  *rect = surface->clip_rect;
587  }
588 }

References rect.

◆ SDL_GetColorKey()

int SDL_GetColorKey ( SDL_Surface surface,
Uint32 key 
)

Gets the color key (transparent pixel) in a blittable surface.

Parameters
surfaceThe surface to update
keyA pointer filled in with the transparent pixel in the native surface format
Returns
0 on success, or -1 if the surface is not valid or colorkey is not enabled.

Definition at line 290 of file SDL_surface.c.

291 {
292  if (!surface) {
293  return SDL_InvalidParamError("surface");
294  }
295 
296  if (!(surface->map->info.flags & SDL_COPY_COLORKEY)) {
297  return SDL_SetError("Surface doesn't have a colorkey");
298  }
299 
300  if (key) {
301  *key = surface->map->info.colorkey;
302  }
303  return 0;
304 }

References SDL_COPY_COLORKEY, SDL_InvalidParamError, and SDL_SetError.

◆ SDL_GetSurfaceAlphaMod()

int SDL_GetSurfaceAlphaMod ( SDL_Surface surface,
Uint8 alpha 
)

Get the additional alpha value used in blit operations.

Parameters
surfaceThe surface to query.
alphaA pointer filled in with the current alpha value.
Returns
0 on success, or -1 if the surface is not valid.
See also
SDL_SetSurfaceAlphaMod()

Definition at line 474 of file SDL_surface.c.

475 {
476  if (!surface) {
477  return -1;
478  }
479 
480  if (alpha) {
481  *alpha = surface->map->info.a;
482  }
483  return 0;
484 }

◆ SDL_GetSurfaceBlendMode()

int SDL_GetSurfaceBlendMode ( SDL_Surface surface,
SDL_BlendMode blendMode 
)

Get the blend mode used for blit operations.

Parameters
surfaceThe surface to query.
blendModeA pointer filled in with the current blend mode.
Returns
0 on success, or -1 if the surface is not valid.
See also
SDL_SetSurfaceBlendMode()

Definition at line 527 of file SDL_surface.c.

528 {
529  if (!surface) {
530  return -1;
531  }
532 
533  if (!blendMode) {
534  return 0;
535  }
536 
537  switch (surface->map->
538  info.flags & (SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD | SDL_COPY_MUL)) {
539  case SDL_COPY_BLEND:
541  break;
542  case SDL_COPY_ADD:
544  break;
545  case SDL_COPY_MOD:
547  break;
548  case SDL_COPY_MUL:
550  break;
551  default:
553  break;
554  }
555  return 0;
556 }

References blendMode, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_BLENDMODE_MOD, SDL_BLENDMODE_MUL, SDL_BLENDMODE_NONE, SDL_COPY_ADD, SDL_COPY_BLEND, SDL_COPY_MOD, and SDL_COPY_MUL.

◆ SDL_GetSurfaceColorMod()

int SDL_GetSurfaceColorMod ( SDL_Surface surface,
Uint8 r,
Uint8 g,
Uint8 b 
)

Get the additional color value used in blit operations.

Parameters
surfaceThe surface to query.
rA pointer filled in with the current red color value.
gA pointer filled in with the current green color value.
bA pointer filled in with the current blue color value.
Returns
0 on success, or -1 if the surface is not valid.
See also
SDL_SetSurfaceColorMod()

Definition at line 432 of file SDL_surface.c.

433 {
434  if (!surface) {
435  return -1;
436  }
437 
438  if (r) {
439  *r = surface->map->info.r;
440  }
441  if (g) {
442  *g = surface->map->info.g;
443  }
444  if (b) {
445  *b = surface->map->info.b;
446  }
447  return 0;
448 }

◆ SDL_HasColorKey()

SDL_bool SDL_HasColorKey ( SDL_Surface surface)

Returns whether the surface has a color key.

Returns
SDL_TRUE if the surface has a color key, or SDL_FALSE if the surface is NULL or has no color key

Definition at line 276 of file SDL_surface.c.

277 {
278  if (!surface) {
279  return SDL_FALSE;
280  }
281 
282  if (!(surface->map->info.flags & SDL_COPY_COLORKEY)) {
283  return SDL_FALSE;
284  }
285 
286  return SDL_TRUE;
287 }

References SDL_COPY_COLORKEY, SDL_FALSE, and SDL_TRUE.

◆ SDL_LockSurface()

int SDL_LockSurface ( SDL_Surface surface)

Sets up a surface for directly accessing the pixels.

Between calls to SDL_LockSurface() / SDL_UnlockSurface(), you can write to and read from surface->pixels, using the pixel format stored in surface->format. Once you are done accessing the surface, you should use SDL_UnlockSurface() to release it.

Not all surfaces require locking. If SDL_MUSTLOCK(surface) evaluates to 0, then you can read and write to the surface at any time, and the pixel format of the surface will not change.

No operating system or library calls should be made between lock/unlock pairs, as critical system locks may be held during this time.

SDL_LockSurface() returns 0, or -1 if the surface couldn't be locked.

See also
SDL_UnlockSurface()

Definition at line 905 of file SDL_surface.c.

906 {
907  if (!surface->locked) {
908 #if SDL_HAVE_RLE
909  /* Perform the lock */
910  if (surface->flags & SDL_RLEACCEL) {
912  surface->flags |= SDL_RLEACCEL; /* save accel'd state */
913  }
914 #endif
915  }
916 
917  /* Increment the surface lock count, for recursive locks */
918  ++surface->locked;
919 
920  /* Ready to go.. */
921  return (0);
922 }

References SDL_RLEACCEL, and SDL_UnRLESurface().

Referenced by SDL_ConvertColorkeyToAlpha().

◆ SDL_LowerBlit()

int SDL_LowerBlit ( SDL_Surface src,
SDL_Rect srcrect,
SDL_Surface dst,
SDL_Rect dstrect 
)

This is a semi-private blit function and it performs low-level surface blitting only.

Definition at line 602 of file SDL_surface.c.

604 {
605  /* Check to make sure the blit mapping is valid */
606  if ((src->map->dst != dst) ||
607  (dst->format->palette &&
608  src->map->dst_palette_version != dst->format->palette->version) ||
609  (src->format->palette &&
610  src->map->src_palette_version != src->format->palette->version)) {
611  if (SDL_MapSurface(src, dst) < 0) {
612  return (-1);
613  }
614  /* just here for debugging */
615 /* printf */
616 /* ("src = 0x%08X src->flags = %08X src->map->info.flags = %08x\ndst = 0x%08X dst->flags = %08X dst->map->info.flags = %08X\nsrc->map->blit = 0x%08x\n", */
617 /* src, dst->flags, src->map->info.flags, dst, dst->flags, */
618 /* dst->map->info.flags, src->map->blit); */
619  }
620  return (src->map->blit(src, srcrect, dst, dstrect));
621 }

References SDL_MapSurface().

Referenced by SDL_ConvertPixels(), SDL_ConvertSurface(), SDL_LowerBlitScaled(), and SDL_UpperBlit().

◆ SDL_LowerBlitScaled()

int SDL_LowerBlitScaled ( SDL_Surface src,
SDL_Rect srcrect,
SDL_Surface dst,
SDL_Rect dstrect 
)

This is a semi-private blit function and it performs low-level surface scaled blitting only.

Definition at line 878 of file SDL_surface.c.

880 {
881  static const Uint32 complex_copy_flags = (
885  );
886 
887  if (!(src->map->info.flags & SDL_COPY_NEAREST)) {
888  src->map->info.flags |= SDL_COPY_NEAREST;
889  SDL_InvalidateMap(src->map);
890  }
891 
892  if ( !(src->map->info.flags & complex_copy_flags) &&
893  src->format->format == dst->format->format &&
894  !SDL_ISPIXELFORMAT_INDEXED(src->format->format) ) {
895  return SDL_SoftStretch( src, srcrect, dst, dstrect );
896  } else {
897  return SDL_LowerBlit( src, srcrect, dst, dstrect );
898  }
899 }

References SDL_COPY_ADD, SDL_COPY_BLEND, SDL_COPY_COLORKEY, SDL_COPY_MOD, SDL_COPY_MODULATE_ALPHA, SDL_COPY_MODULATE_COLOR, SDL_COPY_MUL, SDL_COPY_NEAREST, SDL_InvalidateMap(), SDL_ISPIXELFORMAT_INDEXED, SDL_LowerBlit(), and SDL_SoftStretch.

Referenced by SDL_UpperBlitScaled().

◆ SDL_SetClipRect()

SDL_bool SDL_SetClipRect ( SDL_Surface surface,
const SDL_Rect rect 
)

Sets the clipping rectangle for the destination surface in a blit.

If the clip rectangle is NULL, clipping will be disabled.

If the clip rectangle doesn't intersect the surface, the function will return SDL_FALSE and blits will be completely clipped. Otherwise the function returns SDL_TRUE and blits to the surface will be clipped to the intersection of the surface area and the clipping rectangle.

Note that blits are automatically clipped to the edges of the source and destination surfaces.

Definition at line 559 of file SDL_surface.c.

560 {
561  SDL_Rect full_rect;
562 
563  /* Don't do anything if there's no surface to act on */
564  if (!surface) {
565  return SDL_FALSE;
566  }
567 
568  /* Set up the full surface rectangle */
569  full_rect.x = 0;
570  full_rect.y = 0;
571  full_rect.w = surface->w;
572  full_rect.h = surface->h;
573 
574  /* Set the clipping rectangle */
575  if (!rect) {
576  surface->clip_rect = full_rect;
577  return SDL_TRUE;
578  }
579  return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect);
580 }

References SDL_Rect::h, rect, SDL_FALSE, SDL_IntersectRect, SDL_TRUE, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_ConvertSurface(), SDL_CreateRGBSurfaceFrom(), SDL_CreateRGBSurfaceWithFormat(), and SDL_CreateRGBSurfaceWithFormatFrom().

◆ SDL_SetColorKey()

int SDL_SetColorKey ( SDL_Surface surface,
int  flag,
Uint32  key 
)

Sets the color key (transparent pixel) in a blittable surface.

Parameters
surfaceThe surface to update
flagNon-zero to enable colorkey and 0 to disable colorkey
keyThe transparent pixel in the native surface format
Returns
0 on success, or -1 if the surface is not valid

You can pass SDL_RLEACCEL to enable RLE accelerated blits.

Definition at line 245 of file SDL_surface.c.

246 {
247  int flags;
248 
249  if (!surface) {
250  return SDL_InvalidParamError("surface");
251  }
252 
253  if (surface->format->palette && key >= ((Uint32) surface->format->palette->ncolors)) {
254  return SDL_InvalidParamError("key");
255  }
256 
257  if (flag & SDL_RLEACCEL) {
259  }
260 
261  flags = surface->map->info.flags;
262  if (flag) {
263  surface->map->info.flags |= SDL_COPY_COLORKEY;
264  surface->map->info.colorkey = key;
265  } else {
266  surface->map->info.flags &= ~SDL_COPY_COLORKEY;
267  }
268  if (surface->map->info.flags != flags) {
270  }
271 
272  return 0;
273 }

References SDL_COPY_COLORKEY, SDL_InvalidateMap(), SDL_InvalidParamError, SDL_RLEACCEL, and SDL_SetSurfaceRLE().

Referenced by SDL_ConvertColorkeyToAlpha(), and SDL_ConvertSurface().

◆ SDL_SetSurfaceAlphaMod()

int SDL_SetSurfaceAlphaMod ( SDL_Surface surface,
Uint8  alpha 
)

Set an additional alpha value used in blit operations.

Parameters
surfaceThe surface to update.
alphaThe alpha value multiplied into blit operations.
Returns
0 on success, or -1 if the surface is not valid.
See also
SDL_GetSurfaceAlphaMod()

Definition at line 451 of file SDL_surface.c.

452 {
453  int flags;
454 
455  if (!surface) {
456  return -1;
457  }
458 
459  surface->map->info.a = alpha;
460 
461  flags = surface->map->info.flags;
462  if (alpha != 0xFF) {
463  surface->map->info.flags |= SDL_COPY_MODULATE_ALPHA;
464  } else {
465  surface->map->info.flags &= ~SDL_COPY_MODULATE_ALPHA;
466  }
467  if (surface->map->info.flags != flags) {
469  }
470  return 0;
471 }

References SDL_COPY_MODULATE_ALPHA, and SDL_InvalidateMap().

◆ SDL_SetSurfaceBlendMode()

int SDL_SetSurfaceBlendMode ( SDL_Surface surface,
SDL_BlendMode  blendMode 
)

Set the blend mode used for blit operations.

Parameters
surfaceThe surface to update.
blendModeSDL_BlendMode to use for blit blending.
Returns
0 on success, or -1 if the parameters are not valid.
See also
SDL_GetSurfaceBlendMode()

Definition at line 487 of file SDL_surface.c.

488 {
489  int flags, status;
490 
491  if (!surface) {
492  return -1;
493  }
494 
495  status = 0;
496  flags = surface->map->info.flags;
497  surface->map->info.flags &=
499  switch (blendMode) {
500  case SDL_BLENDMODE_NONE:
501  break;
502  case SDL_BLENDMODE_BLEND:
503  surface->map->info.flags |= SDL_COPY_BLEND;
504  break;
505  case SDL_BLENDMODE_ADD:
506  surface->map->info.flags |= SDL_COPY_ADD;
507  break;
508  case SDL_BLENDMODE_MOD:
509  surface->map->info.flags |= SDL_COPY_MOD;
510  break;
511  case SDL_BLENDMODE_MUL:
512  surface->map->info.flags |= SDL_COPY_MUL;
513  break;
514  default:
515  status = SDL_Unsupported();
516  break;
517  }
518 
519  if (surface->map->info.flags != flags) {
521  }
522 
523  return status;
524 }

References blendMode, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_BLENDMODE_MOD, SDL_BLENDMODE_MUL, SDL_BLENDMODE_NONE, SDL_COPY_ADD, SDL_COPY_BLEND, SDL_COPY_MOD, SDL_COPY_MUL, SDL_InvalidateMap(), and SDL_Unsupported.

Referenced by SDL_ConvertColorkeyToAlpha(), SDL_ConvertSurface(), and SDL_CreateRGBSurfaceWithFormat().

◆ SDL_SetSurfaceColorMod()

int SDL_SetSurfaceColorMod ( SDL_Surface surface,
Uint8  r,
Uint8  g,
Uint8  b 
)

Set an additional color value used in blit operations.

Parameters
surfaceThe surface to update.
rThe red color value multiplied into blit operations.
gThe green color value multiplied into blit operations.
bThe blue color value multiplied into blit operations.
Returns
0 on success, or -1 if the surface is not valid.
See also
SDL_GetSurfaceColorMod()

Definition at line 406 of file SDL_surface.c.

407 {
408  int flags;
409 
410  if (!surface) {
411  return -1;
412  }
413 
414  surface->map->info.r = r;
415  surface->map->info.g = g;
416  surface->map->info.b = b;
417 
418  flags = surface->map->info.flags;
419  if (r != 0xFF || g != 0xFF || b != 0xFF) {
420  surface->map->info.flags |= SDL_COPY_MODULATE_COLOR;
421  } else {
422  surface->map->info.flags &= ~SDL_COPY_MODULATE_COLOR;
423  }
424  if (surface->map->info.flags != flags) {
426  }
427  return 0;
428 }

References SDL_COPY_MODULATE_COLOR, and SDL_InvalidateMap().

◆ SDL_SetSurfacePalette()

int SDL_SetSurfacePalette ( SDL_Surface surface,
SDL_Palette palette 
)

Set the palette used by a surface.

Returns
0, or -1 if the surface format doesn't use a palette.
Note
A single palette can be shared with many surfaces.

Definition at line 210 of file SDL_surface.c.

211 {
212  if (!surface) {
213  return SDL_SetError("SDL_SetSurfacePalette() passed a NULL surface");
214  }
215  if (SDL_SetPixelFormatPalette(surface->format, palette) < 0) {
216  return -1;
217  }
219 
220  return 0;
221 }

References SDL_InvalidateMap(), SDL_SetError, and SDL_SetPixelFormatPalette.

Referenced by SDL_ConvertSurface(), SDL_CreateRGBSurfaceWithFormat(), and SDL_FreeSurface().

◆ SDL_SetSurfaceRLE()

int SDL_SetSurfaceRLE ( SDL_Surface surface,
int  flag 
)

Sets the RLE acceleration hint for a surface.

Returns
0 on success, or -1 if the surface is not valid
Note
If RLE is enabled, colorkey and alpha blending blits are much faster, but the surface must be locked before directly accessing the pixels.

Definition at line 224 of file SDL_surface.c.

225 {
226  int flags;
227 
228  if (!surface) {
229  return -1;
230  }
231 
232  flags = surface->map->info.flags;
233  if (flag) {
234  surface->map->info.flags |= SDL_COPY_RLE_DESIRED;
235  } else {
236  surface->map->info.flags &= ~SDL_COPY_RLE_DESIRED;
237  }
238  if (surface->map->info.flags != flags) {
240  }
241  return 0;
242 }

References SDL_COPY_RLE_DESIRED, and SDL_InvalidateMap().

Referenced by SDL_ConvertSurface(), and SDL_SetColorKey().

◆ SDL_UnlockSurface()

void SDL_UnlockSurface ( SDL_Surface surface)
See also
SDL_LockSurface()

Definition at line 928 of file SDL_surface.c.

929 {
930  /* Only perform an unlock if we are locked */
931  if (!surface->locked || (--surface->locked > 0)) {
932  return;
933  }
934 
935 #if SDL_HAVE_RLE
936  /* Update RLE encoded surface with new data */
937  if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
938  surface->flags &= ~SDL_RLEACCEL; /* stop lying */
940  }
941 #endif
942 }

References SDL_RLEACCEL, and SDL_RLESurface().

Referenced by SDL_ConvertColorkeyToAlpha(), and SDL_FreeSurface().

◆ SDL_UpperBlit()

int SDL_UpperBlit ( SDL_Surface src,
const SDL_Rect srcrect,
SDL_Surface dst,
SDL_Rect dstrect 
)

This is the public blit function, SDL_BlitSurface(), and it performs rectangle validation and clipping before passing it to SDL_LowerBlit()

Definition at line 625 of file SDL_surface.c.

627 {
628  SDL_Rect fulldst;
629  int srcx, srcy, w, h;
630 
631  /* Make sure the surfaces aren't locked */
632  if (!src || !dst) {
633  return SDL_SetError("SDL_UpperBlit: passed a NULL surface");
634  }
635  if (src->locked || dst->locked) {
636  return SDL_SetError("Surfaces must not be locked during blit");
637  }
638 
639  /* If the destination rectangle is NULL, use the entire dest surface */
640  if (dstrect == NULL) {
641  fulldst.x = fulldst.y = 0;
642  fulldst.w = dst->w;
643  fulldst.h = dst->h;
644  dstrect = &fulldst;
645  }
646 
647  /* clip the source rectangle to the source surface */
648  if (srcrect) {
649  int maxw, maxh;
650 
651  srcx = srcrect->x;
652  w = srcrect->w;
653  if (srcx < 0) {
654  w += srcx;
655  dstrect->x -= srcx;
656  srcx = 0;
657  }
658  maxw = src->w - srcx;
659  if (maxw < w)
660  w = maxw;
661 
662  srcy = srcrect->y;
663  h = srcrect->h;
664  if (srcy < 0) {
665  h += srcy;
666  dstrect->y -= srcy;
667  srcy = 0;
668  }
669  maxh = src->h - srcy;
670  if (maxh < h)
671  h = maxh;
672 
673  } else {
674  srcx = srcy = 0;
675  w = src->w;
676  h = src->h;
677  }
678 
679  /* clip the destination rectangle against the clip rectangle */
680  {
681  SDL_Rect *clip = &dst->clip_rect;
682  int dx, dy;
683 
684  dx = clip->x - dstrect->x;
685  if (dx > 0) {
686  w -= dx;
687  dstrect->x += dx;
688  srcx += dx;
689  }
690  dx = dstrect->x + w - clip->x - clip->w;
691  if (dx > 0)
692  w -= dx;
693 
694  dy = clip->y - dstrect->y;
695  if (dy > 0) {
696  h -= dy;
697  dstrect->y += dy;
698  srcy += dy;
699  }
700  dy = dstrect->y + h - clip->y - clip->h;
701  if (dy > 0)
702  h -= dy;
703  }
704 
705  /* Switch back to a fast blit if we were previously stretching */
706  if (src->map->info.flags & SDL_COPY_NEAREST) {
707  src->map->info.flags &= ~SDL_COPY_NEAREST;
708  SDL_InvalidateMap(src->map);
709  }
710 
711  if (w > 0 && h > 0) {
712  SDL_Rect sr;
713  sr.x = srcx;
714  sr.y = srcy;
715  sr.w = dstrect->w = w;
716  sr.h = dstrect->h = h;
717  return SDL_LowerBlit(src, &sr, dst, dstrect);
718  }
719  dstrect->w = dstrect->h = 0;
720  return 0;
721 }

References SDL_Rect::h, NULL, SDL_COPY_NEAREST, SDL_InvalidateMap(), SDL_LowerBlit(), SDL_SetError, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

◆ SDL_UpperBlitScaled()

int SDL_UpperBlitScaled ( SDL_Surface src,
const SDL_Rect srcrect,
SDL_Surface dst,
SDL_Rect dstrect 
)

This is the public scaled blit function, SDL_BlitScaled(), and it performs rectangle validation and clipping before passing it to SDL_LowerBlitScaled()

Definition at line 724 of file SDL_surface.c.

726 {
727  double src_x0, src_y0, src_x1, src_y1;
728  double dst_x0, dst_y0, dst_x1, dst_y1;
729  SDL_Rect final_src, final_dst;
730  double scaling_w, scaling_h;
731  int src_w, src_h;
732  int dst_w, dst_h;
733 
734  /* Make sure the surfaces aren't locked */
735  if (!src || !dst) {
736  return SDL_SetError("SDL_UpperBlitScaled: passed a NULL surface");
737  }
738  if (src->locked || dst->locked) {
739  return SDL_SetError("Surfaces must not be locked during blit");
740  }
741 
742  if (NULL == srcrect) {
743  src_w = src->w;
744  src_h = src->h;
745  } else {
746  src_w = srcrect->w;
747  src_h = srcrect->h;
748  }
749 
750  if (NULL == dstrect) {
751  dst_w = dst->w;
752  dst_h = dst->h;
753  } else {
754  dst_w = dstrect->w;
755  dst_h = dstrect->h;
756  }
757 
758  if (dst_w == src_w && dst_h == src_h) {
759  /* No scaling, defer to regular blit */
760  return SDL_BlitSurface(src, srcrect, dst, dstrect);
761  }
762 
763  scaling_w = (double)dst_w / src_w;
764  scaling_h = (double)dst_h / src_h;
765 
766  if (NULL == dstrect) {
767  dst_x0 = 0;
768  dst_y0 = 0;
769  dst_x1 = dst_w - 1;
770  dst_y1 = dst_h - 1;
771  } else {
772  dst_x0 = dstrect->x;
773  dst_y0 = dstrect->y;
774  dst_x1 = dst_x0 + dst_w - 1;
775  dst_y1 = dst_y0 + dst_h - 1;
776  }
777 
778  if (NULL == srcrect) {
779  src_x0 = 0;
780  src_y0 = 0;
781  src_x1 = src_w - 1;
782  src_y1 = src_h - 1;
783  } else {
784  src_x0 = srcrect->x;
785  src_y0 = srcrect->y;
786  src_x1 = src_x0 + src_w - 1;
787  src_y1 = src_y0 + src_h - 1;
788 
789  /* Clip source rectangle to the source surface */
790 
791  if (src_x0 < 0) {
792  dst_x0 -= src_x0 * scaling_w;
793  src_x0 = 0;
794  }
795 
796  if (src_x1 >= src->w) {
797  dst_x1 -= (src_x1 - src->w + 1) * scaling_w;
798  src_x1 = src->w - 1;
799  }
800 
801  if (src_y0 < 0) {
802  dst_y0 -= src_y0 * scaling_h;
803  src_y0 = 0;
804  }
805 
806  if (src_y1 >= src->h) {
807  dst_y1 -= (src_y1 - src->h + 1) * scaling_h;
808  src_y1 = src->h - 1;
809  }
810  }
811 
812  /* Clip destination rectangle to the clip rectangle */
813 
814  /* Translate to clip space for easier calculations */
815  dst_x0 -= dst->clip_rect.x;
816  dst_x1 -= dst->clip_rect.x;
817  dst_y0 -= dst->clip_rect.y;
818  dst_y1 -= dst->clip_rect.y;
819 
820  if (dst_x0 < 0) {
821  src_x0 -= dst_x0 / scaling_w;
822  dst_x0 = 0;
823  }
824 
825  if (dst_x1 >= dst->clip_rect.w) {
826  src_x1 -= (dst_x1 - dst->clip_rect.w + 1) / scaling_w;
827  dst_x1 = dst->clip_rect.w - 1;
828  }
829 
830  if (dst_y0 < 0) {
831  src_y0 -= dst_y0 / scaling_h;
832  dst_y0 = 0;
833  }
834 
835  if (dst_y1 >= dst->clip_rect.h) {
836  src_y1 -= (dst_y1 - dst->clip_rect.h + 1) / scaling_h;
837  dst_y1 = dst->clip_rect.h - 1;
838  }
839 
840  /* Translate back to surface coordinates */
841  dst_x0 += dst->clip_rect.x;
842  dst_x1 += dst->clip_rect.x;
843  dst_y0 += dst->clip_rect.y;
844  dst_y1 += dst->clip_rect.y;
845 
846  final_src.x = (int)SDL_floor(src_x0 + 0.5);
847  final_src.y = (int)SDL_floor(src_y0 + 0.5);
848  final_src.w = (int)SDL_floor(src_x1 + 1 + 0.5) - (int)SDL_floor(src_x0 + 0.5);
849  final_src.h = (int)SDL_floor(src_y1 + 1 + 0.5) - (int)SDL_floor(src_y0 + 0.5);
850 
851  final_dst.x = (int)SDL_floor(dst_x0 + 0.5);
852  final_dst.y = (int)SDL_floor(dst_y0 + 0.5);
853  final_dst.w = (int)SDL_floor(dst_x1 - dst_x0 + 1.5);
854  final_dst.h = (int)SDL_floor(dst_y1 - dst_y0 + 1.5);
855 
856  if (final_dst.w < 0)
857  final_dst.w = 0;
858  if (final_dst.h < 0)
859  final_dst.h = 0;
860 
861  if (dstrect)
862  *dstrect = final_dst;
863 
864  if (final_dst.w == 0 || final_dst.h == 0 ||
865  final_src.w <= 0 || final_src.h <= 0) {
866  /* No-op. */
867  return 0;
868  }
869 
870  return SDL_LowerBlitScaled(src, &final_src, dst, &final_dst);
871 }

References SDL_Rect::h, NULL, SDL_BlitSurface, SDL_floor, SDL_LowerBlitScaled(), SDL_SetError, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

format
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: SDL_opengl.h:1572
SDL_memset
#define SDL_memset
Definition: SDL_dynapi_overrides.h:386
SDL_BITSPERPIXEL
#define SDL_BITSPERPIXEL(X)
Definition: SDL_pixels.h:127
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:203
SDL_PixelFormat::BytesPerPixel
Uint8 BytesPerPixel
Definition: SDL_pixels.h:323
mask
GLenum GLint GLuint mask
Definition: SDL_opengl_glext.h:660
Sint64
int64_t Sint64
Definition: SDL_stdinc.h:210
SDL_Palette::ncolors
int ncolors
Definition: SDL_pixels.h:309
blendMode
static SDL_BlendMode blendMode
Definition: testdraw2.c:34
SDL_Color::b
Uint8 b
Definition: SDL_pixels.h:302
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:70
SDL_LowerBlit
int SDL_LowerBlit(SDL_Surface *src, SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect)
Definition: SDL_surface.c:602
SDL_BlitMap
Definition: SDL_blit.h:87
SDL_SoftStretch
#define SDL_SoftStretch
Definition: SDL_dynapi_overrides.h:470
SDL_BLENDMODE_ADD
@ SDL_BLENDMODE_ADD
Definition: SDL_blendmode.h:47
SDL_COPY_RLE_COLORKEY
#define SDL_COPY_RLE_COLORKEY
Definition: SDL_blit.h:43
SDL_RLEACCEL
#define SDL_RLEACCEL
Definition: SDL_surface.h:54
NULL
#define NULL
Definition: begin_code.h:167
surface
EGLSurface surface
Definition: eglext.h:248
SDL_ALPHA_OPAQUE
#define SDL_ALPHA_OPAQUE
Definition: SDL_pixels.h:46
b
GLboolean GLboolean GLboolean b
Definition: SDL_opengl_glext.h:1112
width
GLint GLint GLsizei width
Definition: SDL_opengl.h:1572
SDL_Surface::pixels
void * pixels
Definition: SDL_surface.h:76
g
GLboolean GLboolean g
Definition: SDL_opengl_glext.h:1112
SDL_BlitInfo::b
Uint8 b
Definition: SDL_blit.h:71
SDL_zerop
#define SDL_zerop(x)
Definition: SDL_stdinc.h:419
SDL_UnRLESurface
void SDL_UnRLESurface(SDL_Surface *surface, int recode)
Definition: SDL_RLEaccel.c:1547
SDL_Color::r
Uint8 r
Definition: SDL_pixels.h:300
SDL_CreateSurfaceOnStack
static SDL_INLINE SDL_bool SDL_CreateSurfaceOnStack(int width, int height, Uint32 pixel_format, void *pixels, int pitch, SDL_Surface *surface, SDL_PixelFormat *format, SDL_BlitMap *blitmap)
Definition: SDL_surface.c:1204
r
GLdouble GLdouble GLdouble r
Definition: SDL_opengl.h:2079
SDL_MasksToPixelFormatEnum
#define SDL_MasksToPixelFormatEnum
Definition: SDL_dynapi_overrides.h:279
SDL_AllocBlitMap
SDL_BlitMap * SDL_AllocBlitMap(void)
Definition: SDL_pixels.c:959
SDL_InvalidParamError
#define SDL_InvalidParamError(param)
Definition: SDL_error.h:54
SDL_LowerBlitScaled
int SDL_LowerBlitScaled(SDL_Surface *src, SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect)
Definition: SDL_surface.c:878
SDL_IntersectRect
#define SDL_IntersectRect
Definition: SDL_dynapi_overrides.h:294
SDL_floor
#define SDL_floor
Definition: SDL_dynapi_overrides.h:431
SDL_DONTFREE
#define SDL_DONTFREE
Definition: SDL_surface.h:55
SDL_COPY_COLORKEY
#define SDL_COPY_COLORKEY
Definition: SDL_blit.h:40
SDL_ISPIXELFORMAT_INDEXED
#define SDL_ISPIXELFORMAT_INDEXED(format)
Definition: SDL_pixels.h:134
SDL_BlitMap::info
SDL_BlitInfo info
Definition: SDL_blit.h:93
h
GLfloat GLfloat GLfloat GLfloat h
Definition: SDL_opengl_glext.h:1949
SDL_Rect::x
int x
Definition: SDL_rect.h:79
SDL_AllocFormat
#define SDL_AllocFormat
Definition: SDL_dynapi_overrides.h:280
SDL_ConvertSurface
SDL_Surface * SDL_ConvertSurface(SDL_Surface *surface, const SDL_PixelFormat *format, Uint32 flags)
Definition: SDL_surface.c:957
SDL_Rect::w
int w
Definition: SDL_rect.h:80
row
GLenum GLenum void * row
Definition: SDL_opengl_glext.h:3141
SDL_stack_alloc
#define SDL_stack_alloc(type, count)
Definition: SDL_stdinc.h:354
SDL_Color::a
Uint8 a
Definition: SDL_pixels.h:303
SDL_COPY_RLE_DESIRED
#define SDL_COPY_RLE_DESIRED
Definition: SDL_blit.h:42
SDL_PREALLOC
#define SDL_PREALLOC
Definition: SDL_surface.h:53
alpha
GLfloat GLfloat GLfloat alpha
Definition: SDL_opengl_glext.h:415
dst
GLenum GLenum dst
Definition: SDL_opengl_glext.h:1740
SDL_SetSurfaceBlendMode
int SDL_SetSurfaceBlendMode(SDL_Surface *surface, SDL_BlendMode blendMode)
Set the blend mode used for blit operations.
Definition: SDL_surface.c:487
SDL_BLENDMODE_MOD
@ SDL_BLENDMODE_MOD
Definition: SDL_blendmode.h:50
SDL_COPY_MUL
#define SDL_COPY_MUL
Definition: SDL_blit.h:39
SDL_BLENDMODE_NONE
@ SDL_BLENDMODE_NONE
Definition: SDL_blendmode.h:42
SDL_memcpy
#define SDL_memcpy
Definition: SDL_dynapi_overrides.h:387
SDL_FALSE
@ SDL_FALSE
Definition: SDL_stdinc.h:163
SDL_Palette::colors
SDL_Color * colors
Definition: SDL_pixels.h:310
SDL_MapSurface
int SDL_MapSurface(SDL_Surface *src, SDL_Surface *dst)
Definition: SDL_pixels.c:998
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
SDL_Color::g
Uint8 g
Definition: SDL_pixels.h:301
SDL_Rect::y
int y
Definition: SDL_rect.h:79
SDL_memcmp
#define SDL_memcmp
Definition: SDL_dynapi_overrides.h:389
SDL_Rect::h
int h
Definition: SDL_rect.h:80
SDL_free
#define SDL_free
Definition: SDL_dynapi_overrides.h:377
SDL_BlitSurface
#define SDL_BlitSurface
Definition: SDL_surface.h:484
SDL_CreateRGBSurface
SDL_Surface * SDL_CreateRGBSurface(Uint32 flags, int width, int height, int depth, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
Definition: SDL_surface.c:147
height
GLint GLint GLsizei GLsizei height
Definition: SDL_opengl.h:1572
SDL_BLENDMODE_MUL
@ SDL_BLENDMODE_MUL
Definition: SDL_blendmode.h:53
SDL_COPY_BLEND
#define SDL_COPY_BLEND
Definition: SDL_blit.h:36
SDL_RLESurface
int SDL_RLESurface(SDL_Surface *surface)
Definition: SDL_RLEaccel.c:1407
rect
SDL_Rect rect
Definition: testrelative.c:27
SDL_PixelFormat::palette
SDL_Palette * palette
Definition: SDL_pixels.h:321
Uint16
uint16_t Uint16
Definition: SDL_stdinc.h:191
key
GLuint64 key
Definition: gl2ext.h:2192
SDL_SetColorKey
int SDL_SetColorKey(SDL_Surface *surface, int flag, Uint32 key)
Sets the color key (transparent pixel) in a blittable surface.
Definition: SDL_surface.c:245
SDL_FreeFormat
#define SDL_FreeFormat
Definition: SDL_dynapi_overrides.h:281
SDL_BlitInfo::g
Uint8 g
Definition: SDL_blit.h:71
SDL_Surface::map
struct SDL_BlitMap * map
Definition: SDL_surface.h:89
SDL_PixelFormat
Definition: SDL_pixels.h:318
SDL_BlitInfo::a
Uint8 a
Definition: SDL_blit.h:71
depth
GLint GLint GLsizei GLsizei GLsizei depth
Definition: SDL_opengl.h:1572
SDL_UnlockSurface
void SDL_UnlockSurface(SDL_Surface *surface)
Definition: SDL_surface.c:928
pixels
GLint GLint GLsizei GLsizei GLsizei GLint GLenum GLenum const GLvoid * pixels
Definition: SDL_opengl.h:1572
SDL_COPY_MODULATE_ALPHA
#define SDL_COPY_MODULATE_ALPHA
Definition: SDL_blit.h:35
SDL_SetClipRect
SDL_bool SDL_SetClipRect(SDL_Surface *surface, const SDL_Rect *rect)
Definition: SDL_surface.c:559
SDL_CreateRGBSurfaceWithFormat
SDL_Surface * SDL_CreateRGBSurfaceWithFormat(Uint32 flags, int width, int height, int depth, Uint32 format)
Definition: SDL_surface.c:59
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_FreePalette
#define SDL_FreePalette
Definition: SDL_dynapi_overrides.h:285
SDL_BLENDMODE_BLEND
@ SDL_BLENDMODE_BLEND
Definition: SDL_blendmode.h:44
size
GLsizeiptr size
Definition: SDL_opengl_glext.h:540
y
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
SDL_COPY_RLE_ALPHAKEY
#define SDL_COPY_RLE_ALPHAKEY
Definition: SDL_blit.h:44
bpp
set set set set set set set macro pixldst1 abits if abits op else op endif endm macro pixldst2 abits if abits op else op endif endm macro pixldst4 abits if abits op else op endif endm macro pixldst0 abits op endm macro pixldst3 mem_operand op endm macro pixldst30 mem_operand op endm macro pixldst abits if abits elseif abits elseif abits elseif abits elseif abits pixldst0 abits else pixldst0 abits pixldst0 abits pixldst0 abits pixldst0 abits endif elseif abits else pixldst0 abits pixldst0 abits endif elseif abits else error unsupported bpp
Definition: pixman-arm-neon-asm.h:146
SDL_SetSurfacePalette
int SDL_SetSurfacePalette(SDL_Surface *surface, SDL_Palette *palette)
Set the palette used by a surface.
Definition: SDL_surface.c:210
SDL_AllocPalette
#define SDL_AllocPalette
Definition: SDL_dynapi_overrides.h:282
SDL_calloc
#define SDL_calloc
Definition: SDL_dynapi_overrides.h:375
SDL_ConvertPixels_YUV_to_YUV
int SDL_ConvertPixels_YUV_to_YUV(int width, int height, Uint32 src_format, const void *src, int src_pitch, Uint32 dst_format, void *dst, int dst_pitch)
Definition: SDL_yuv.c:1817
SDL_CalculatePitch
static int SDL_CalculatePitch(Uint32 format, int width)
Definition: SDL_surface.c:41
SDL_Palette
Definition: SDL_pixels.h:307
src
GLenum src
Definition: SDL_opengl_glext.h:1740
SDL_SetSurfaceRLE
int SDL_SetSurfaceRLE(SDL_Surface *surface, int flag)
Sets the RLE acceleration hint for a surface.
Definition: SDL_surface.c:224
SDL_TRUE
@ SDL_TRUE
Definition: SDL_stdinc.h:164
SDL_stack_free
#define SDL_stack_free(data)
Definition: SDL_stdinc.h:355
SDL_ISPIXELFORMAT_FOURCC
#define SDL_ISPIXELFORMAT_FOURCC(format)
Definition: SDL_pixels.h:167
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_BYTESPERPIXEL
#define SDL_BYTESPERPIXEL(X)
Definition: SDL_pixels.h:128
SDL_InvalidateMap
void SDL_InvalidateMap(SDL_BlitMap *map)
Definition: SDL_pixels.c:979
SDL_COPY_NEAREST
#define SDL_COPY_NEAREST
Definition: SDL_blit.h:41
SDL_Rect
A rectangle, with the origin at the upper left (integer).
Definition: SDL_rect.h:77
SDL_MAX_SINT32
#define SDL_MAX_SINT32
A signed 32-bit integer type.
Definition: SDL_stdinc.h:195
SDL_BlitInfo::r
Uint8 r
Definition: SDL_blit.h:71
SDL_SIMDAlloc
#define SDL_SIMDAlloc
Definition: SDL_dynapi_overrides.h:718
SDL_PIXELFORMAT_UNKNOWN
@ SDL_PIXELFORMAT_UNKNOWN
Definition: SDL_pixels.h:173
SDL_COPY_ADD
#define SDL_COPY_ADD
Definition: SDL_blit.h:37
SDL_Color
Definition: SDL_pixels.h:298
SDL_FreeSurface
void SDL_FreeSurface(SDL_Surface *surface)
Definition: SDL_surface.c:1310
SDL_COPY_MOD
#define SDL_COPY_MOD
Definition: SDL_blit.h:38
SDL_FillRect
#define SDL_FillRect
Definition: SDL_dynapi_overrides.h:466
SDL_BlitInfo::flags
int flags
Definition: SDL_blit.h:69
SDL_COPY_MODULATE_COLOR
#define SDL_COPY_MODULATE_COLOR
Definition: SDL_blit.h:34
SDL_ConvertPixels_RGB_to_YUV
int SDL_ConvertPixels_RGB_to_YUV(int width, int height, Uint32 src_format, const void *src, int src_pitch, Uint32 dst_format, void *dst, int dst_pitch)
Definition: SDL_yuv.c:786
SDL_ALPHA_TRANSPARENT
#define SDL_ALPHA_TRANSPARENT
Definition: SDL_pixels.h:47
SDL_Unsupported
#define SDL_Unsupported()
Definition: SDL_error.h:53
SDL_FreeBlitMap
void SDL_FreeBlitMap(SDL_BlitMap *map)
Definition: SDL_pixels.c:1086
SDL_ConvertColorkeyToAlpha
static void SDL_ConvertColorkeyToAlpha(SDL_Surface *surface, SDL_bool ignore_alpha)
Definition: SDL_surface.c:308
void
const SDL_PRINTF_FORMAT_STRING char int const SDL_PRINTF_FORMAT_STRING char int const SDL_PRINTF_FORMAT_STRING char int const SDL_PRINTF_FORMAT_STRING char const char const SDL_SCANF_FORMAT_STRING char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
Definition: SDL_dynapi_procs.h:89
flags
GLbitfield flags
Definition: SDL_opengl_glext.h:1483
SDL_SetPixelFormatPalette
#define SDL_SetPixelFormatPalette
Definition: SDL_dynapi_overrides.h:283
SDL_LockSurface
int SDL_LockSurface(SDL_Surface *surface)
Sets up a surface for directly accessing the pixels.
Definition: SDL_surface.c:905
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:73
SDL_SIMD_ALIGNED
#define SDL_SIMD_ALIGNED
Definition: SDL_surface.h:56
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
SDL_ConvertPixels_YUV_to_RGB
int SDL_ConvertPixels_YUV_to_RGB(int width, int height, Uint32 src_format, const void *src, int src_pitch, Uint32 dst_format, void *dst, int dst_pitch)
Definition: SDL_yuv.c:397
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:161
w
GLubyte GLubyte GLubyte GLubyte w
Definition: SDL_opengl_glext.h:734
SDL_SIMDFree
#define SDL_SIMDFree
Definition: SDL_dynapi_overrides.h:719
SDL_InitFormat
int SDL_InitFormat(SDL_PixelFormat *format, Uint32 pixel_format)
Definition: SDL_pixels.c:544
Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:179