21 #include "../SDL_internal.h" 41 #define SAVE_32BIT_BMP 48 #define BI_BITFIELDS 3 52 #ifndef LCS_WINDOWS_COLOR_SPACE 54 #define LCS_WINDOWS_COLOR_SPACE 0x57696E20 61 #if SDL_BYTEORDER == SDL_BIG_ENDIAN 62 int alphaChannelOffset = 0;
64 int alphaChannelOffset = 3;
78 alpha = ((
Uint8*)surface->
pixels) + alphaChannelOffset;
128 (
void) haveAlphaMask;
164 }
else if (biSize >= 40) {
225 if (biSize > headerSize) {
229 if (biWidth <= 0 || biHeight == 0) {
230 SDL_SetError(
"BMP file with bad dimensions (%dx%d)", biWidth, biHeight);
236 biHeight = -biHeight;
248 switch (biBitCount) {
251 ExpandBMP = biBitCount;
259 SDL_SetError(
"%d-bpp BMP images are not supported", biBitCount);
268 switch (biCompression) {
274 switch (biBitCount) {
282 #if SDL_BYTEORDER == SDL_BIG_ENDIAN 318 if (surface ==
NULL) {
324 palette = (surface->
format)->palette;
327 if (biClrUsed == 0) {
328 biClrUsed = 1 << biBitCount;
329 }
else if (biClrUsed > (1 << biBitCount)) {
330 SDL_SetError(
"BMP file has an invalid number of colors");
334 if ((
int) biClrUsed > palette->
ncolors) {
336 int ncolors = biClrUsed;
340 sizeof(*palette->
colors));
348 }
else if ((
int) biClrUsed < palette->ncolors) {
352 for (i = 0; i < (int) biClrUsed; ++
i) {
359 for (i = 0; i < (int) biClrUsed; ++
i) {
384 bmpPitch = (biWidth + 7) >> 3;
385 pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
388 bmpPitch = (biWidth + 1) >> 1;
389 pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
392 pad = ((surface->
pitch % 4) ? (4 - (surface->
pitch % 4)) : 0);
398 bits = end - surface->
pitch;
400 while (bits >= top && bits < end) {
405 int shift = (8 - ExpandBMP);
406 for (i = 0; i < surface->
w; ++
i) {
407 if (i % (8 / ExpandBMP) == 0) {
414 bits[
i] = (pixel >> shift);
415 if (bits[i] >= biClrUsed) {
416 SDL_SetError(
"A BMP image contains a pixel with a color out of the palette");
431 if (biBitCount == 8 && palette && biClrUsed < (1 << biBitCount)) {
432 for (i = 0; i < surface->
w; ++
i) {
433 if (bits[i] >= biClrUsed) {
434 SDL_SetError(
"A BMP image contains a pixel with a color out of the palette");
440 #if SDL_BYTEORDER == SDL_BIG_ENDIAN 443 switch (biBitCount) {
447 for (i = 0; i < surface->
w; i++)
454 for (i = 0; i < surface->
w; i++)
465 for (i = 0; i < pad; ++
i) {
470 bits += surface->
pitch;
472 bits -= surface->
pitch;
486 if (freesrc && src) {
503 char magic[2] = {
'B',
'M' };
528 Sint32 bV4Endpoints[3 * 3] = {0};
536 #ifdef SAVE_32BIT_BMP 609 biWidth = surface->
w;
610 biHeight = surface->
h;
614 biSizeImage = surface->
h * surface->
pitch;
625 if (save32bit && !saveLegacyBMP) {
629 bV4RedMask = 0x00ff0000;
630 bV4GreenMask = 0x0000ff00;
631 bV4BlueMask = 0x000000ff;
632 bV4AlphaMask = 0xff000000;
653 if (save32bit && !saveLegacyBMP) {
659 for (i = 0; i < 3 * 3; i++) {
674 for (i = 0; i < ncolors; ++
i) {
694 pad = ((bw % 4) ? (4 - (bw % 4)) : 0);
696 bits -= surface->
pitch;
702 const Uint8 padbyte = 0;
703 for (i = 0; i < pad; ++
i) {
721 if (surface != saveme) {
726 if (freedst && dst) {
GLdouble GLdouble GLdouble r
#define SDL_UnlockSurface
#define SDL_COPY_COLORKEY
#define LCS_WINDOWS_COLOR_SPACE
#define SDL_RWwrite(ctx, ptr, size, n)
#define SDL_ConvertSurface
A collection of pixels used in software blitting.
#define SDL_RWread(ctx, ptr, size, n)
GLenum GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const void * bits
static void CorrectAlphaChannel(SDL_Surface *surface)
GLdouble GLdouble GLdouble GLdouble top
GLfloat GLfloat GLfloat alpha
#define SDL_GetHintBoolean
#define SDL_RWseek(ctx, offset, whence)
SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x)
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
#define SDL_HINT_BMP_SAVE_LEGACY_FORMAT
Prevent SDL from using version 4 of the bitmap header when saving BMPs.
SDL_FORCE_INLINE Uint16 SDL_Swap16(Uint16 x)
int SDL_InitFormat(SDL_PixelFormat *format, Uint32 pixel_format)
int SDL_SaveBMP_RW(SDL_Surface *saveme, SDL_RWops *dst, int freedst)
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)
#define SDL_assert(condition)
#define SDL_OutOfMemory()
SDL_Surface * SDL_LoadBMP_RW(SDL_RWops *src, int freesrc)
#define SDL_CreateRGBSurface
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
GLboolean GLboolean GLboolean GLboolean a
GLboolean GLboolean GLboolean b