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Diffstat (limited to 'distrib/sdl-1.2.12/src/video/SDL_bmp.c')
-rw-r--r--distrib/sdl-1.2.12/src/video/SDL_bmp.c520
1 files changed, 0 insertions, 520 deletions
diff --git a/distrib/sdl-1.2.12/src/video/SDL_bmp.c b/distrib/sdl-1.2.12/src/video/SDL_bmp.c
deleted file mode 100644
index 874cb27..0000000
--- a/distrib/sdl-1.2.12/src/video/SDL_bmp.c
+++ /dev/null
@@ -1,520 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
- Sam Lantinga
- slouken@libsdl.org
-*/
-#include "SDL_config.h"
-
-/*
- Code to load and save surfaces in Windows BMP format.
-
- Why support BMP format? Well, it's a native format for Windows, and
- most image processing programs can read and write it. It would be nice
- to be able to have at least one image format that we can natively load
- and save, and since PNG is so complex that it would bloat the library,
- BMP is a good alternative.
-
- This code currently supports Win32 DIBs in uncompressed 8 and 24 bpp.
-*/
-
-#include "SDL_video.h"
-#include "SDL_endian.h"
-
-/* Compression encodings for BMP files */
-#ifndef BI_RGB
-#define BI_RGB 0
-#define BI_RLE8 1
-#define BI_RLE4 2
-#define BI_BITFIELDS 3
-#endif
-
-
-SDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc)
-{
- int was_error;
- long fp_offset;
- int bmpPitch;
- int i, pad;
- SDL_Surface *surface;
- Uint32 Rmask;
- Uint32 Gmask;
- Uint32 Bmask;
- SDL_Palette *palette;
- Uint8 *bits;
- int ExpandBMP;
-
- /* The Win32 BMP file header (14 bytes) */
- char magic[2];
- Uint32 bfSize;
- Uint16 bfReserved1;
- Uint16 bfReserved2;
- Uint32 bfOffBits;
-
- /* The Win32 BITMAPINFOHEADER struct (40 bytes) */
- Uint32 biSize;
- Sint32 biWidth;
- Sint32 biHeight;
- Uint16 biPlanes;
- Uint16 biBitCount;
- Uint32 biCompression;
- Uint32 biSizeImage;
- Sint32 biXPelsPerMeter;
- Sint32 biYPelsPerMeter;
- Uint32 biClrUsed;
- Uint32 biClrImportant;
-
- /* Make sure we are passed a valid data source */
- surface = NULL;
- was_error = 0;
- if ( src == NULL ) {
- was_error = 1;
- goto done;
- }
-
- /* Read in the BMP file header */
- fp_offset = SDL_RWtell(src);
- SDL_ClearError();
- if ( SDL_RWread(src, magic, 1, 2) != 2 ) {
- SDL_Error(SDL_EFREAD);
- was_error = 1;
- goto done;
- }
- if ( SDL_strncmp(magic, "BM", 2) != 0 ) {
- SDL_SetError("File is not a Windows BMP file");
- was_error = 1;
- goto done;
- }
- bfSize = SDL_ReadLE32(src);
- bfReserved1 = SDL_ReadLE16(src);
- bfReserved2 = SDL_ReadLE16(src);
- bfOffBits = SDL_ReadLE32(src);
-
- /* Read the Win32 BITMAPINFOHEADER */
- biSize = SDL_ReadLE32(src);
- if ( biSize == 12 ) {
- biWidth = (Uint32)SDL_ReadLE16(src);
- biHeight = (Uint32)SDL_ReadLE16(src);
- biPlanes = SDL_ReadLE16(src);
- biBitCount = SDL_ReadLE16(src);
- biCompression = BI_RGB;
- biSizeImage = 0;
- biXPelsPerMeter = 0;
- biYPelsPerMeter = 0;
- biClrUsed = 0;
- biClrImportant = 0;
- } else {
- biWidth = SDL_ReadLE32(src);
- biHeight = SDL_ReadLE32(src);
- biPlanes = SDL_ReadLE16(src);
- biBitCount = SDL_ReadLE16(src);
- biCompression = SDL_ReadLE32(src);
- biSizeImage = SDL_ReadLE32(src);
- biXPelsPerMeter = SDL_ReadLE32(src);
- biYPelsPerMeter = SDL_ReadLE32(src);
- biClrUsed = SDL_ReadLE32(src);
- biClrImportant = SDL_ReadLE32(src);
- }
-
- /* Check for read error */
- if ( SDL_strcmp(SDL_GetError(), "") != 0 ) {
- was_error = 1;
- goto done;
- }
-
- /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */
- switch (biBitCount) {
- case 1:
- case 4:
- ExpandBMP = biBitCount;
- biBitCount = 8;
- break;
- default:
- ExpandBMP = 0;
- break;
- }
-
- /* We don't support any BMP compression right now */
- Rmask = Gmask = Bmask = 0;
- switch (biCompression) {
- case BI_RGB:
- /* If there are no masks, use the defaults */
- if ( bfOffBits == (14+biSize) ) {
- /* Default values for the BMP format */
- switch (biBitCount) {
- case 15:
- case 16:
- Rmask = 0x7C00;
- Gmask = 0x03E0;
- Bmask = 0x001F;
- break;
- case 24:
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
- Rmask = 0x000000FF;
- Gmask = 0x0000FF00;
- Bmask = 0x00FF0000;
- break;
-#endif
- case 32:
- Rmask = 0x00FF0000;
- Gmask = 0x0000FF00;
- Bmask = 0x000000FF;
- break;
- default:
- break;
- }
- break;
- }
- /* Fall through -- read the RGB masks */
-
- case BI_BITFIELDS:
- switch (biBitCount) {
- case 15:
- case 16:
- case 32:
- Rmask = SDL_ReadLE32(src);
- Gmask = SDL_ReadLE32(src);
- Bmask = SDL_ReadLE32(src);
- break;
- default:
- break;
- }
- break;
- default:
- SDL_SetError("Compressed BMP files not supported");
- was_error = 1;
- goto done;
- }
-
- /* Create a compatible surface, note that the colors are RGB ordered */
- surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
- biWidth, biHeight, biBitCount, Rmask, Gmask, Bmask, 0);
- if ( surface == NULL ) {
- was_error = 1;
- goto done;
- }
-
- /* Load the palette, if any */
- palette = (surface->format)->palette;
- if ( palette ) {
- if ( biClrUsed == 0 ) {
- biClrUsed = 1 << biBitCount;
- }
- if ( biSize == 12 ) {
- for ( i = 0; i < (int)biClrUsed; ++i ) {
- SDL_RWread(src, &palette->colors[i].b, 1, 1);
- SDL_RWread(src, &palette->colors[i].g, 1, 1);
- SDL_RWread(src, &palette->colors[i].r, 1, 1);
- palette->colors[i].unused = 0;
- }
- } else {
- for ( i = 0; i < (int)biClrUsed; ++i ) {
- SDL_RWread(src, &palette->colors[i].b, 1, 1);
- SDL_RWread(src, &palette->colors[i].g, 1, 1);
- SDL_RWread(src, &palette->colors[i].r, 1, 1);
- SDL_RWread(src, &palette->colors[i].unused, 1, 1);
- }
- }
- palette->ncolors = biClrUsed;
- }
-
- /* Read the surface pixels. Note that the bmp image is upside down */
- if ( SDL_RWseek(src, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) {
- SDL_Error(SDL_EFSEEK);
- was_error = 1;
- goto done;
- }
- bits = (Uint8 *)surface->pixels+(surface->h*surface->pitch);
- switch (ExpandBMP) {
- case 1:
- bmpPitch = (biWidth + 7) >> 3;
- pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0);
- break;
- case 4:
- bmpPitch = (biWidth + 1) >> 1;
- pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0);
- break;
- default:
- pad = ((surface->pitch%4) ?
- (4-(surface->pitch%4)) : 0);
- break;
- }
- while ( bits > (Uint8 *)surface->pixels ) {
- bits -= surface->pitch;
- switch (ExpandBMP) {
- case 1:
- case 4: {
- Uint8 pixel = 0;
- int shift = (8-ExpandBMP);
- for ( i=0; i<surface->w; ++i ) {
- if ( i%(8/ExpandBMP) == 0 ) {
- if ( !SDL_RWread(src, &pixel, 1, 1) ) {
- SDL_SetError(
- "Error reading from BMP");
- was_error = 1;
- goto done;
- }
- }
- *(bits+i) = (pixel>>shift);
- pixel <<= ExpandBMP;
- } }
- break;
-
- default:
- if ( SDL_RWread(src, bits, 1, surface->pitch)
- != surface->pitch ) {
- SDL_Error(SDL_EFREAD);
- was_error = 1;
- goto done;
- }
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
- /* Byte-swap the pixels if needed. Note that the 24bpp
- case has already been taken care of above. */
- switch(biBitCount) {
- case 15:
- case 16: {
- Uint16 *pix = (Uint16 *)bits;
- for(i = 0; i < surface->w; i++)
- pix[i] = SDL_Swap16(pix[i]);
- break;
- }
-
- case 32: {
- Uint32 *pix = (Uint32 *)bits;
- for(i = 0; i < surface->w; i++)
- pix[i] = SDL_Swap32(pix[i]);
- break;
- }
- }
-#endif
- break;
- }
- /* Skip padding bytes, ugh */
- if ( pad ) {
- Uint8 padbyte;
- for ( i=0; i<pad; ++i ) {
- SDL_RWread(src, &padbyte, 1, 1);
- }
- }
- }
-done:
- if ( was_error ) {
- if ( src ) {
- SDL_RWseek(src, fp_offset, RW_SEEK_SET);
- }
- if ( surface ) {
- SDL_FreeSurface(surface);
- }
- surface = NULL;
- }
- if ( freesrc && src ) {
- SDL_RWclose(src);
- }
- return(surface);
-}
-
-int SDL_SaveBMP_RW (SDL_Surface *saveme, SDL_RWops *dst, int freedst)
-{
- long fp_offset;
- int i, pad;
- SDL_Surface *surface;
- Uint8 *bits;
-
- /* The Win32 BMP file header (14 bytes) */
- char magic[2] = { 'B', 'M' };
- Uint32 bfSize;
- Uint16 bfReserved1;
- Uint16 bfReserved2;
- Uint32 bfOffBits;
-
- /* The Win32 BITMAPINFOHEADER struct (40 bytes) */
- Uint32 biSize;
- Sint32 biWidth;
- Sint32 biHeight;
- Uint16 biPlanes;
- Uint16 biBitCount;
- Uint32 biCompression;
- Uint32 biSizeImage;
- Sint32 biXPelsPerMeter;
- Sint32 biYPelsPerMeter;
- Uint32 biClrUsed;
- Uint32 biClrImportant;
-
- /* Make sure we have somewhere to save */
- surface = NULL;
- if ( dst ) {
- if ( saveme->format->palette ) {
- if ( saveme->format->BitsPerPixel == 8 ) {
- surface = saveme;
- } else {
- SDL_SetError("%d bpp BMP files not supported",
- saveme->format->BitsPerPixel);
- }
- }
- else if ( (saveme->format->BitsPerPixel == 24) &&
-#if SDL_BYTEORDER == SDL_LIL_ENDIAN
- (saveme->format->Rmask == 0x00FF0000) &&
- (saveme->format->Gmask == 0x0000FF00) &&
- (saveme->format->Bmask == 0x000000FF)
-#else
- (saveme->format->Rmask == 0x000000FF) &&
- (saveme->format->Gmask == 0x0000FF00) &&
- (saveme->format->Bmask == 0x00FF0000)
-#endif
- ) {
- surface = saveme;
- } else {
- SDL_Rect bounds;
-
- /* Convert to 24 bits per pixel */
- surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
- saveme->w, saveme->h, 24,
-#if SDL_BYTEORDER == SDL_LIL_ENDIAN
- 0x00FF0000, 0x0000FF00, 0x000000FF,
-#else
- 0x000000FF, 0x0000FF00, 0x00FF0000,
-#endif
- 0);
- if ( surface != NULL ) {
- bounds.x = 0;
- bounds.y = 0;
- bounds.w = saveme->w;
- bounds.h = saveme->h;
- if ( SDL_LowerBlit(saveme, &bounds, surface,
- &bounds) < 0 ) {
- SDL_FreeSurface(surface);
- SDL_SetError(
- "Couldn't convert image to 24 bpp");
- surface = NULL;
- }
- }
- }
- }
-
- if ( surface && (SDL_LockSurface(surface) == 0) ) {
- const int bw = surface->w*surface->format->BytesPerPixel;
-
- /* Set the BMP file header values */
- bfSize = 0; /* We'll write this when we're done */
- bfReserved1 = 0;
- bfReserved2 = 0;
- bfOffBits = 0; /* We'll write this when we're done */
-
- /* Write the BMP file header values */
- fp_offset = SDL_RWtell(dst);
- SDL_ClearError();
- SDL_RWwrite(dst, magic, 2, 1);
- SDL_WriteLE32(dst, bfSize);
- SDL_WriteLE16(dst, bfReserved1);
- SDL_WriteLE16(dst, bfReserved2);
- SDL_WriteLE32(dst, bfOffBits);
-
- /* Set the BMP info values */
- biSize = 40;
- biWidth = surface->w;
- biHeight = surface->h;
- biPlanes = 1;
- biBitCount = surface->format->BitsPerPixel;
- biCompression = BI_RGB;
- biSizeImage = surface->h*surface->pitch;
- biXPelsPerMeter = 0;
- biYPelsPerMeter = 0;
- if ( surface->format->palette ) {
- biClrUsed = surface->format->palette->ncolors;
- } else {
- biClrUsed = 0;
- }
- biClrImportant = 0;
-
- /* Write the BMP info values */
- SDL_WriteLE32(dst, biSize);
- SDL_WriteLE32(dst, biWidth);
- SDL_WriteLE32(dst, biHeight);
- SDL_WriteLE16(dst, biPlanes);
- SDL_WriteLE16(dst, biBitCount);
- SDL_WriteLE32(dst, biCompression);
- SDL_WriteLE32(dst, biSizeImage);
- SDL_WriteLE32(dst, biXPelsPerMeter);
- SDL_WriteLE32(dst, biYPelsPerMeter);
- SDL_WriteLE32(dst, biClrUsed);
- SDL_WriteLE32(dst, biClrImportant);
-
- /* Write the palette (in BGR color order) */
- if ( surface->format->palette ) {
- SDL_Color *colors;
- int ncolors;
-
- colors = surface->format->palette->colors;
- ncolors = surface->format->palette->ncolors;
- for ( i=0; i<ncolors; ++i ) {
- SDL_RWwrite(dst, &colors[i].b, 1, 1);
- SDL_RWwrite(dst, &colors[i].g, 1, 1);
- SDL_RWwrite(dst, &colors[i].r, 1, 1);
- SDL_RWwrite(dst, &colors[i].unused, 1, 1);
- }
- }
-
- /* Write the bitmap offset */
- bfOffBits = SDL_RWtell(dst)-fp_offset;
- if ( SDL_RWseek(dst, fp_offset+10, RW_SEEK_SET) < 0 ) {
- SDL_Error(SDL_EFSEEK);
- }
- SDL_WriteLE32(dst, bfOffBits);
- if ( SDL_RWseek(dst, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) {
- SDL_Error(SDL_EFSEEK);
- }
-
- /* Write the bitmap image upside down */
- bits = (Uint8 *)surface->pixels+(surface->h*surface->pitch);
- pad = ((bw%4) ? (4-(bw%4)) : 0);
- while ( bits > (Uint8 *)surface->pixels ) {
- bits -= surface->pitch;
- if ( SDL_RWwrite(dst, bits, 1, bw) != bw) {
- SDL_Error(SDL_EFWRITE);
- break;
- }
- if ( pad ) {
- const Uint8 padbyte = 0;
- for ( i=0; i<pad; ++i ) {
- SDL_RWwrite(dst, &padbyte, 1, 1);
- }
- }
- }
-
- /* Write the BMP file size */
- bfSize = SDL_RWtell(dst)-fp_offset;
- if ( SDL_RWseek(dst, fp_offset+2, RW_SEEK_SET) < 0 ) {
- SDL_Error(SDL_EFSEEK);
- }
- SDL_WriteLE32(dst, bfSize);
- if ( SDL_RWseek(dst, fp_offset+bfSize, RW_SEEK_SET) < 0 ) {
- SDL_Error(SDL_EFSEEK);
- }
-
- /* Close it up.. */
- SDL_UnlockSurface(surface);
- if ( surface != saveme ) {
- SDL_FreeSurface(surface);
- }
- }
-
- if ( freedst && dst ) {
- SDL_RWclose(dst);
- }
- return((SDL_strcmp(SDL_GetError(), "") == 0) ? 0 : -1);
-}
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