src/video/SDL_bmp.c
author Ryan C. Gordon <icculus@icculus.org>
Thu, 09 Aug 2012 14:14:41 -0400
changeset 6389 43a190ad60a7
parent 6138 4c64952a58fb
child 6666 018f8019ce36
permissions -rwxr-xr-x
Removed some unused variables that gcc 4.6.1 complains about.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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/* 
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   Code to load and save surfaces in Windows BMP format.
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   Why support BMP format?  Well, it's a native format for Windows, and
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   most image processing programs can read and write it.  It would be nice
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   to be able to have at least one image format that we can natively load
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   and save, and since PNG is so complex that it would bloat the library,
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   BMP is a good alternative. 
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   This code currently supports Win32 DIBs in uncompressed 8 and 24 bpp.
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*/
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#include "SDL_video.h"
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#include "SDL_endian.h"
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#include "SDL_pixels_c.h"
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#define SAVE_32BIT_BMP
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/* Compression encodings for BMP files */
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#ifndef BI_RGB
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#define BI_RGB		0
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#define BI_RLE8		1
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#define BI_RLE4		2
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#define BI_BITFIELDS	3
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#endif
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SDL_Surface *
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SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
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{
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    SDL_bool was_error;
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    long fp_offset = 0;
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    int bmpPitch;
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    int i, pad;
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    SDL_Surface *surface;
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    Uint32 Rmask;
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    Uint32 Gmask;
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    Uint32 Bmask;
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    Uint32 Amask;
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    SDL_Palette *palette;
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    Uint8 *bits;
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    Uint8 *top, *end;
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    SDL_bool topDown;
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    int ExpandBMP;
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    /* The Win32 BMP file header (14 bytes) */
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    char magic[2];
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    /*Uint32 bfSize = 0;*/
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    /*Uint16 bfReserved1 = 0;*/
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    /*Uint16 bfReserved2 = 0;*/
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    Uint32 bfOffBits = 0;
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    /* The Win32 BITMAPINFOHEADER struct (40 bytes) */
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    Uint32 biSize = 0;
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    Sint32 biWidth = 0;
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    Sint32 biHeight = 0;
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    /*Uint16 biPlanes = 0;*/
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    Uint16 biBitCount = 0;
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    Uint32 biCompression = 0;
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    /*Uint32 biSizeImage = 0;*/
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    /*Sint32 biXPelsPerMeter = 0;*/
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    /*Sint32 biYPelsPerMeter = 0;*/
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    Uint32 biClrUsed = 0;
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    /*Uint32 biClrImportant = 0;*/
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    /* Make sure we are passed a valid data source */
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    surface = NULL;
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    was_error = SDL_FALSE;
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    if (src == NULL) {
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        was_error = SDL_TRUE;
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        goto done;
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    }
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    /* Read in the BMP file header */
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    fp_offset = SDL_RWtell(src);
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    SDL_ClearError();
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    if (SDL_RWread(src, magic, 1, 2) != 2) {
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        SDL_Error(SDL_EFREAD);
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        was_error = SDL_TRUE;
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        goto done;
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    }
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    if (SDL_strncmp(magic, "BM", 2) != 0) {
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        SDL_SetError("File is not a Windows BMP file");
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        was_error = SDL_TRUE;
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        goto done;
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    }
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    /*bfSize =*/ SDL_ReadLE32(src);
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    /*bfReserved1 =*/ SDL_ReadLE16(src);
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    /*bfReserved2 =*/ SDL_ReadLE16(src);
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    bfOffBits = SDL_ReadLE32(src);
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    /* Read the Win32 BITMAPINFOHEADER */
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    biSize = SDL_ReadLE32(src);
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    if (biSize == 12) {
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        biWidth = (Uint32) SDL_ReadLE16(src);
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        biHeight = (Uint32) SDL_ReadLE16(src);
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        /*biPlanes =*/ SDL_ReadLE16(src);
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        biBitCount = SDL_ReadLE16(src);
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        biCompression = BI_RGB;
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    } else {
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        biWidth = SDL_ReadLE32(src);
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        biHeight = SDL_ReadLE32(src);
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        /*biPlanes =*/ SDL_ReadLE16(src);
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        biBitCount = SDL_ReadLE16(src);
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parents: 1402
diff changeset
   127
        biCompression = SDL_ReadLE32(src);
6389
43a190ad60a7 Removed some unused variables that gcc 4.6.1 complains about.
Ryan C. Gordon <icculus@icculus.org>
parents: 6138
diff changeset
   128
        /*biSizeImage =*/ SDL_ReadLE32(src);
43a190ad60a7 Removed some unused variables that gcc 4.6.1 complains about.
Ryan C. Gordon <icculus@icculus.org>
parents: 6138
diff changeset
   129
        /*biXPelsPerMeter =*/ SDL_ReadLE32(src);
43a190ad60a7 Removed some unused variables that gcc 4.6.1 complains about.
Ryan C. Gordon <icculus@icculus.org>
parents: 6138
diff changeset
   130
        /*biYPelsPerMeter =*/ SDL_ReadLE32(src);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   131
        biClrUsed = SDL_ReadLE32(src);
6389
43a190ad60a7 Removed some unused variables that gcc 4.6.1 complains about.
Ryan C. Gordon <icculus@icculus.org>
parents: 6138
diff changeset
   132
        /*biClrImportant =*/ SDL_ReadLE32(src);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   133
    }
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   134
    if (biHeight < 0) {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   135
        topDown = SDL_TRUE;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   136
        biHeight = -biHeight;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   137
    } else {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   138
        topDown = SDL_FALSE;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   139
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   140
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   141
    /* Check for read error */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   142
    if (SDL_strcmp(SDL_GetError(), "") != 0) {
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   143
        was_error = SDL_TRUE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   144
        goto done;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   145
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   146
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   147
    /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   148
    switch (biBitCount) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   149
    case 1:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   150
    case 4:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   151
        ExpandBMP = biBitCount;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   152
        biBitCount = 8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   153
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   154
    default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   155
        ExpandBMP = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   156
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   157
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   158
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   159
    /* We don't support any BMP compression right now */
3497
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   160
    Rmask = Gmask = Bmask = Amask = 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   161
    switch (biCompression) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   162
    case BI_RGB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   163
        /* If there are no masks, use the defaults */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   164
        if (bfOffBits == (14 + biSize)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   165
            /* Default values for the BMP format */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   166
            switch (biBitCount) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   167
            case 15:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   168
            case 16:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   169
                Rmask = 0x7C00;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   170
                Gmask = 0x03E0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   171
                Bmask = 0x001F;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   172
                break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   173
            case 24:
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   174
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   175
                Rmask = 0x000000FF;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   176
                Gmask = 0x0000FF00;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   177
                Bmask = 0x00FF0000;
3497
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   178
#else
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   179
                Rmask = 0x00FF0000;
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   180
                Gmask = 0x0000FF00;
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   181
                Bmask = 0x000000FF;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   182
#endif
3497
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   183
                break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   184
            case 32:
3497
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   185
                Amask = 0xFF000000;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   186
                Rmask = 0x00FF0000;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   187
                Gmask = 0x0000FF00;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   188
                Bmask = 0x000000FF;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   189
                break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   190
            default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   191
                break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   192
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   193
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   194
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   195
        /* Fall through -- read the RGB masks */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   196
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   197
    case BI_BITFIELDS:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   198
        switch (biBitCount) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   199
        case 15:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   200
        case 16:
3497
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   201
            Rmask = SDL_ReadLE32(src);
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   202
            Gmask = SDL_ReadLE32(src);
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   203
            Bmask = SDL_ReadLE32(src);
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   204
            break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   205
        case 32:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   206
            Rmask = SDL_ReadLE32(src);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   207
            Gmask = SDL_ReadLE32(src);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   208
            Bmask = SDL_ReadLE32(src);
3497
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   209
            Amask = SDL_ReadLE32(src);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   210
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   211
        default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   212
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   213
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   214
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   215
    default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   216
        SDL_SetError("Compressed BMP files not supported");
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   217
        was_error = SDL_TRUE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   218
        goto done;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   219
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   220
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   221
    /* Create a compatible surface, note that the colors are RGB ordered */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   222
    surface =
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   223
        SDL_CreateRGBSurface(0, biWidth, biHeight, biBitCount, Rmask, Gmask,
3497
74d2f44a85de Added support for 32-bit BMP files with an alpha channel
Sam Lantinga <slouken@libsdl.org>
parents: 3310
diff changeset
   224
                             Bmask, Amask);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   225
    if (surface == NULL) {
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   226
        was_error = SDL_TRUE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   227
        goto done;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   228
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   229
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   230
    /* Load the palette, if any */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   231
    palette = (surface->format)->palette;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   232
    if (palette) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   233
        if (biClrUsed == 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   234
            biClrUsed = 1 << biBitCount;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   235
        }
2920
Sam Lantinga <slouken@libsdl.org>
parents: 2918
diff changeset
   236
        if ((int) biClrUsed > palette->ncolors) {
2851
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   237
            palette->ncolors = biClrUsed;
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   238
            palette->colors =
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   239
                (SDL_Color *) SDL_realloc(palette->colors,
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   240
                                          palette->ncolors *
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   241
                                          sizeof(*palette->colors));
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   242
            if (!palette->colors) {
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   243
                SDL_OutOfMemory();
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   244
                was_error = SDL_TRUE;
2851
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   245
                goto done;
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   246
            }
2920
Sam Lantinga <slouken@libsdl.org>
parents: 2918
diff changeset
   247
        } else if ((int) biClrUsed < palette->ncolors) {
2851
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   248
            palette->ncolors = biClrUsed;
6c3fbeb04eca Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents: 2823
diff changeset
   249
        }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   250
        if (biSize == 12) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   251
            for (i = 0; i < (int) biClrUsed; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   252
                SDL_RWread(src, &palette->colors[i].b, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   253
                SDL_RWread(src, &palette->colors[i].g, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   254
                SDL_RWread(src, &palette->colors[i].r, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   255
                palette->colors[i].unused = SDL_ALPHA_OPAQUE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   256
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   257
        } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   258
            for (i = 0; i < (int) biClrUsed; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   259
                SDL_RWread(src, &palette->colors[i].b, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   260
                SDL_RWread(src, &palette->colors[i].g, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   261
                SDL_RWread(src, &palette->colors[i].r, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   262
                SDL_RWread(src, &palette->colors[i].unused, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   263
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   264
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   265
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   266
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   267
    /* Read the surface pixels.  Note that the bmp image is upside down */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   268
    if (SDL_RWseek(src, fp_offset + bfOffBits, RW_SEEK_SET) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   269
        SDL_Error(SDL_EFSEEK);
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   270
        was_error = SDL_TRUE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   271
        goto done;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   272
    }
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   273
    top = (Uint8 *)surface->pixels;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   274
    end = (Uint8 *)surface->pixels+(surface->h*surface->pitch);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   275
    switch (ExpandBMP) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   276
    case 1:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   277
        bmpPitch = (biWidth + 7) >> 3;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   278
        pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   279
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   280
    case 4:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   281
        bmpPitch = (biWidth + 1) >> 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   282
        pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   283
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   284
    default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   285
        pad = ((surface->pitch % 4) ? (4 - (surface->pitch % 4)) : 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   286
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   287
    }
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   288
    if (topDown) {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   289
        bits = top;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   290
    } else {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   291
        bits = end - surface->pitch;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   292
    }
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   293
    while (bits >= top && bits < end) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   294
        switch (ExpandBMP) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   295
        case 1:
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   296
        case 4:{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   297
                Uint8 pixel = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   298
                int shift = (8 - ExpandBMP);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   299
                for (i = 0; i < surface->w; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   300
                    if (i % (8 / ExpandBMP) == 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   301
                        if (!SDL_RWread(src, &pixel, 1, 1)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   302
                            SDL_SetError("Error reading from BMP");
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   303
                            was_error = SDL_TRUE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   304
                            goto done;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   305
                        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   306
                    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   307
                    *(bits + i) = (pixel >> shift);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   308
                    pixel <<= ExpandBMP;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   309
                }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   310
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   311
            break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   312
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   313
        default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   314
            if (SDL_RWread(src, bits, 1, surface->pitch)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   315
                != surface->pitch) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   316
                SDL_Error(SDL_EFREAD);
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   317
                was_error = SDL_TRUE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   318
                goto done;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   319
            }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   320
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   321
            /* Byte-swap the pixels if needed. Note that the 24bpp
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   322
               case has already been taken care of above. */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   323
            switch (biBitCount) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   324
            case 15:
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   325
            case 16:{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   326
                    Uint16 *pix = (Uint16 *) bits;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   327
                    for (i = 0; i < surface->w; i++)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   328
                        pix[i] = SDL_Swap16(pix[i]);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   329
                    break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   330
                }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   331
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   332
            case 32:{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   333
                    Uint32 *pix = (Uint32 *) bits;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   334
                    for (i = 0; i < surface->w; i++)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   335
                        pix[i] = SDL_Swap32(pix[i]);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   336
                    break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   337
                }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   338
            }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   339
#endif
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   340
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   341
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   342
        /* Skip padding bytes, ugh */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   343
        if (pad) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   344
            Uint8 padbyte;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   345
            for (i = 0; i < pad; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   346
                SDL_RWread(src, &padbyte, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   347
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   348
        }
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   349
        if (topDown) {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   350
            bits += surface->pitch;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   351
        } else {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   352
            bits -= surface->pitch;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   353
        }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   354
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   355
  done:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   356
    if (was_error) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   357
        if (src) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   358
            SDL_RWseek(src, fp_offset, RW_SEEK_SET);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   359
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   360
        if (surface) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   361
            SDL_FreeSurface(surface);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   362
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   363
        surface = NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   364
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   365
    if (freesrc && src) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   366
        SDL_RWclose(src);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   367
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   368
    return (surface);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   369
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   370
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   371
int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   372
SDL_SaveBMP_RW(SDL_Surface * saveme, SDL_RWops * dst, int freedst)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   373
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   374
    long fp_offset;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   375
    int i, pad;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   376
    SDL_Surface *surface;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   377
    Uint8 *bits;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   378
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   379
    /* The Win32 BMP file header (14 bytes) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   380
    char magic[2] = { 'B', 'M' };
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   381
    Uint32 bfSize;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   382
    Uint16 bfReserved1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   383
    Uint16 bfReserved2;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   384
    Uint32 bfOffBits;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   385
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   386
    /* The Win32 BITMAPINFOHEADER struct (40 bytes) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   387
    Uint32 biSize;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   388
    Sint32 biWidth;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   389
    Sint32 biHeight;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   390
    Uint16 biPlanes;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   391
    Uint16 biBitCount;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   392
    Uint32 biCompression;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   393
    Uint32 biSizeImage;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   394
    Sint32 biXPelsPerMeter;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   395
    Sint32 biYPelsPerMeter;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   396
    Uint32 biClrUsed;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   397
    Uint32 biClrImportant;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   398
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   399
    /* Make sure we have somewhere to save */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   400
    surface = NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   401
    if (dst) {
2969
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   402
        SDL_bool save32bit = SDL_FALSE;
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   403
#ifdef SAVE_32BIT_BMP
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   404
        /* We can save alpha information in a 32-bit BMP */
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   405
        if (saveme->map->info.flags & SDL_COPY_COLORKEY ||
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   406
            saveme->format->Amask) {
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   407
            save32bit = SDL_TRUE;
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   408
        }
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   409
#endif /* SAVE_32BIT_BMP */
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   410
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   411
        if (saveme->format->palette && !save32bit) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   412
            if (saveme->format->BitsPerPixel == 8) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   413
                surface = saveme;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   414
            } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   415
                SDL_SetError("%d bpp BMP files not supported",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   416
                             saveme->format->BitsPerPixel);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   417
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   418
        } else if ((saveme->format->BitsPerPixel == 24) &&
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   419
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   420
                   (saveme->format->Rmask == 0x00FF0000) &&
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   421
                   (saveme->format->Gmask == 0x0000FF00) &&
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   422
                   (saveme->format->Bmask == 0x000000FF)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   423
#else
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   424
                   (saveme->format->Rmask == 0x000000FF) &&
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   425
                   (saveme->format->Gmask == 0x0000FF00) &&
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   426
                   (saveme->format->Bmask == 0x00FF0000)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   427
#endif
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   428
            ) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   429
            surface = saveme;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   430
        } else {
2967
e4a469d6ddab Implemented SDL_SetWindowIcon(), with translucent icon support under X11.
Sam Lantinga <slouken@libsdl.org>
parents: 2920
diff changeset
   431
            SDL_PixelFormat format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   432
2969
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   433
            /* If the surface has a colorkey or alpha channel we'll save a
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   434
               32-bit BMP with alpha channel, otherwise save a 24-bit BMP. */
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   435
            if (save32bit) {
5288
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   436
                SDL_InitFormat(&format, 
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   437
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
5288
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   438
                               SDL_PIXELFORMAT_ARGB8888
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   439
#else
5288
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   440
                               SDL_PIXELFORMAT_BGRA8888
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   441
#endif
5288
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   442
                               );
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   443
            } else {
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   444
                SDL_InitFormat(&format, SDL_PIXELFORMAT_BGR24);
2969
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   445
            }
2967
e4a469d6ddab Implemented SDL_SetWindowIcon(), with translucent icon support under X11.
Sam Lantinga <slouken@libsdl.org>
parents: 2920
diff changeset
   446
            surface = SDL_ConvertSurface(saveme, &format, 0);
e4a469d6ddab Implemented SDL_SetWindowIcon(), with translucent icon support under X11.
Sam Lantinga <slouken@libsdl.org>
parents: 2920
diff changeset
   447
            if (!surface) {
2990
Sam Lantinga <slouken@libsdl.org>
parents: 2969
diff changeset
   448
                SDL_SetError("Couldn't convert image to %d bpp",
Sam Lantinga <slouken@libsdl.org>
parents: 2969
diff changeset
   449
                             format.BitsPerPixel);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   450
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   451
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   452
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   453
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   454
    if (surface && (SDL_LockSurface(surface) == 0)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   455
        const int bw = surface->w * surface->format->BytesPerPixel;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   456
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   457
        /* Set the BMP file header values */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   458
        bfSize = 0;             /* We'll write this when we're done */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   459
        bfReserved1 = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   460
        bfReserved2 = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   461
        bfOffBits = 0;          /* We'll write this when we're done */
1012
f14e3059e138 Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
   462
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   463
        /* Write the BMP file header values */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   464
        fp_offset = SDL_RWtell(dst);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   465
        SDL_ClearError();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   466
        SDL_RWwrite(dst, magic, 2, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   467
        SDL_WriteLE32(dst, bfSize);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   468
        SDL_WriteLE16(dst, bfReserved1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   469
        SDL_WriteLE16(dst, bfReserved2);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   470
        SDL_WriteLE32(dst, bfOffBits);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   471
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   472
        /* Set the BMP info values */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   473
        biSize = 40;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   474
        biWidth = surface->w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   475
        biHeight = surface->h;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   476
        biPlanes = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   477
        biBitCount = surface->format->BitsPerPixel;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   478
        biCompression = BI_RGB;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   479
        biSizeImage = surface->h * surface->pitch;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   480
        biXPelsPerMeter = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   481
        biYPelsPerMeter = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   482
        if (surface->format->palette) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   483
            biClrUsed = surface->format->palette->ncolors;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   484
        } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   485
            biClrUsed = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   486
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   487
        biClrImportant = 0;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   488
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   489
        /* Write the BMP info values */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   490
        SDL_WriteLE32(dst, biSize);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   491
        SDL_WriteLE32(dst, biWidth);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   492
        SDL_WriteLE32(dst, biHeight);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   493
        SDL_WriteLE16(dst, biPlanes);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   494
        SDL_WriteLE16(dst, biBitCount);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   495
        SDL_WriteLE32(dst, biCompression);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   496
        SDL_WriteLE32(dst, biSizeImage);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   497
        SDL_WriteLE32(dst, biXPelsPerMeter);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   498
        SDL_WriteLE32(dst, biYPelsPerMeter);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   499
        SDL_WriteLE32(dst, biClrUsed);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   500
        SDL_WriteLE32(dst, biClrImportant);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   501
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   502
        /* Write the palette (in BGR color order) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   503
        if (surface->format->palette) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   504
            SDL_Color *colors;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   505
            int ncolors;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   506
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   507
            colors = surface->format->palette->colors;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   508
            ncolors = surface->format->palette->ncolors;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   509
            for (i = 0; i < ncolors; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   510
                SDL_RWwrite(dst, &colors[i].b, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   511
                SDL_RWwrite(dst, &colors[i].g, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   512
                SDL_RWwrite(dst, &colors[i].r, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   513
                SDL_RWwrite(dst, &colors[i].unused, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   514
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   515
        }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   516
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   517
        /* Write the bitmap offset */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   518
        bfOffBits = SDL_RWtell(dst) - fp_offset;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   519
        if (SDL_RWseek(dst, fp_offset + 10, RW_SEEK_SET) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   520
            SDL_Error(SDL_EFSEEK);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   521
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   522
        SDL_WriteLE32(dst, bfOffBits);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   523
        if (SDL_RWseek(dst, fp_offset + bfOffBits, RW_SEEK_SET) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   524
            SDL_Error(SDL_EFSEEK);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   525
        }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   526
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   527
        /* Write the bitmap image upside down */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   528
        bits = (Uint8 *) surface->pixels + (surface->h * surface->pitch);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   529
        pad = ((bw % 4) ? (4 - (bw % 4)) : 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   530
        while (bits > (Uint8 *) surface->pixels) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   531
            bits -= surface->pitch;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   532
            if (SDL_RWwrite(dst, bits, 1, bw) != bw) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   533
                SDL_Error(SDL_EFWRITE);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   534
                break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   535
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   536
            if (pad) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   537
                const Uint8 padbyte = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   538
                for (i = 0; i < pad; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   539
                    SDL_RWwrite(dst, &padbyte, 1, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   540
                }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   541
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   542
        }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   543
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   544
        /* Write the BMP file size */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   545
        bfSize = SDL_RWtell(dst) - fp_offset;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   546
        if (SDL_RWseek(dst, fp_offset + 2, RW_SEEK_SET) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   547
            SDL_Error(SDL_EFSEEK);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   548
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   549
        SDL_WriteLE32(dst, bfSize);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   550
        if (SDL_RWseek(dst, fp_offset + bfSize, RW_SEEK_SET) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   551
            SDL_Error(SDL_EFSEEK);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   552
        }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   553
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   554
        /* Close it up.. */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   555
        SDL_UnlockSurface(surface);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   556
        if (surface != saveme) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   557
            SDL_FreeSurface(surface);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   558
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   559
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   560
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   561
    if (freedst && dst) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   562
        SDL_RWclose(dst);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   563
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   564
    return ((SDL_strcmp(SDL_GetError(), "") == 0) ? 0 : -1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   565
}
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   566
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   567
/* vi: set ts=4 sw=4 expandtab: */