src/video/SDL_bmp.c
author Sam Lantinga <slouken@libsdl.org>
Tue, 16 Apr 2013 09:33:33 -0700
changeset 7068 1fa727447de3
parent 7024 72cb3e205571
child 7191 75360622e65f
permissions -rw-r--r--
BMP files don't contain alpha information in the palette, the fourth element is reserved and must be zero.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2013 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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0
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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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    Sint64 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);
7024
72cb3e205571 We're using the alpha component of the palette entries, let's name it appropriately.
Sam Lantinga <slouken@libsdl.org>
parents: 6885
diff changeset
   255
                palette->colors[i].a = SDL_ALPHA_OPAQUE;
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
   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);
7024
72cb3e205571 We're using the alpha component of the palette entries, let's name it appropriately.
Sam Lantinga <slouken@libsdl.org>
parents: 6885
diff changeset
   262
                SDL_RWread(src, &palette->colors[i].a, 1, 1);
7068
1fa727447de3 BMP files don't contain alpha information in the palette, the fourth element is reserved and must be zero.
Sam Lantinga <slouken@libsdl.org>
parents: 7024
diff changeset
   263
1fa727447de3 BMP files don't contain alpha information in the palette, the fourth element is reserved and must be zero.
Sam Lantinga <slouken@libsdl.org>
parents: 7024
diff changeset
   264
                /* According to Microsoft documentation, the fourth element
1fa727447de3 BMP files don't contain alpha information in the palette, the fourth element is reserved and must be zero.
Sam Lantinga <slouken@libsdl.org>
parents: 7024
diff changeset
   265
                   is reserved and must be zero, so we shouldn't treat it as
1fa727447de3 BMP files don't contain alpha information in the palette, the fourth element is reserved and must be zero.
Sam Lantinga <slouken@libsdl.org>
parents: 7024
diff changeset
   266
                   alpha.
1fa727447de3 BMP files don't contain alpha information in the palette, the fourth element is reserved and must be zero.
Sam Lantinga <slouken@libsdl.org>
parents: 7024
diff changeset
   267
                */
1fa727447de3 BMP files don't contain alpha information in the palette, the fourth element is reserved and must be zero.
Sam Lantinga <slouken@libsdl.org>
parents: 7024
diff changeset
   268
                palette->colors[i].a = SDL_ALPHA_OPAQUE;
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
   269
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   270
        }
c121d94672cb SDL 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
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   272
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
   273
    /* 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
   274
    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
   275
        SDL_Error(SDL_EFSEEK);
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   276
        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
   277
        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
   278
    }
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   279
    top = (Uint8 *)surface->pixels;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   280
    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
   281
    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
   282
    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
   283
        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
   284
        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
   285
        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
   286
    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
   287
        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
   288
        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
   289
        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
   290
    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
   291
        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
   292
        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
   293
    }
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   294
    if (topDown) {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   295
        bits = top;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   296
    } else {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   297
        bits = end - surface->pitch;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   298
    }
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   299
    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
   300
        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
   301
        case 1:
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   302
        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
   303
                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
   304
                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
   305
                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
   306
                    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
   307
                        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
   308
                            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
   309
                            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
   310
                            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
   311
                        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   312
                    }
c121d94672cb SDL 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
                    *(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
   314
                    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
   315
                }
c121d94672cb SDL 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
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   317
            break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   318
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
   319
        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
   320
            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
   321
                != 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
   322
                SDL_Error(SDL_EFREAD);
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   323
                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
   324
                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
   325
            }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   326
#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
   327
            /* 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
   328
               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
   329
            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
   330
            case 15:
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   331
            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
   332
                    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
   333
                    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
   334
                        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
   335
                    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
   336
                }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   337
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   338
            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
   339
                    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
   340
                    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
   341
                        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
   342
                    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
   343
                }
c121d94672cb SDL 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
            }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   345
#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
   346
            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
   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
        /* 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
   349
        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
   350
            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
   351
            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
   352
                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
   353
            }
c121d94672cb SDL 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
        }
3310
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   355
        if (topDown) {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   356
            bits += surface->pitch;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   357
        } else {
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   358
            bits -= surface->pitch;
b907e83deb88 Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents: 3026
diff changeset
   359
        }
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
   360
    }
c121d94672cb SDL 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
  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
   362
    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
   363
        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
   364
            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
   365
        }
c121d94672cb SDL 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
        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
   367
            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
   368
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   369
        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
   370
    }
c121d94672cb SDL 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
    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
   372
        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
   373
    }
c121d94672cb SDL 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
    return (surface);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   375
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   376
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
   377
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
   378
SDL_SaveBMP_RW(SDL_Surface * saveme, SDL_RWops * dst, int freedst)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   379
{
6666
018f8019ce36 Reset the mouse button state when losing mouse focus.
Sam Lantinga <slouken@libsdl.org>
parents: 6389
diff changeset
   380
    Sint64 fp_offset;
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
   381
    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
   382
    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
   383
    Uint8 *bits;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   384
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
   385
    /* 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
   386
    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
   387
    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
   388
    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
   389
    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
   390
    Uint32 bfOffBits;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   391
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
   392
    /* 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
   393
    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
   394
    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
   395
    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
   396
    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
   397
    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
   398
    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
   399
    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
   400
    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
   401
    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
   402
    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
   403
    Uint32 biClrImportant;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   404
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
   405
    /* 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
   406
    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
   407
    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
   408
        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
   409
#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
   410
        /* 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
   411
        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
   412
            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
   413
            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
   414
        }
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   415
#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
   416
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   417
        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
   418
            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
   419
                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
   420
            } 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
   421
                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
   422
                             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
   423
            }
c121d94672cb SDL 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
        } else if ((saveme->format->BitsPerPixel == 24) &&
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   425
#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
   426
                   (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
   427
                   (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
   428
                   (saveme->format->Bmask == 0x000000FF)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   429
#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
   430
                   (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
   431
                   (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
   432
                   (saveme->format->Bmask == 0x00FF0000)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   433
#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
   434
            ) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   435
            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
   436
        } else {
2967
e4a469d6ddab Implemented SDL_SetWindowIcon(), with translucent icon support under X11.
Sam Lantinga <slouken@libsdl.org>
parents: 2920
diff changeset
   437
            SDL_PixelFormat format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   438
2969
1ee69e7e7cea Added support for saving 32-bit BMP with alpha channel (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 2967
diff changeset
   439
            /* 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
   440
               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
   441
            if (save32bit) {
5288
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   442
                SDL_InitFormat(&format, 
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   443
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
5288
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   444
                               SDL_PIXELFORMAT_ARGB8888
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   445
#else
5288
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   446
                               SDL_PIXELFORMAT_BGRA8888
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   447
#endif
5288
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   448
                               );
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   449
            } else {
d4381f3b0d1e A few fixes:
Sam Lantinga <slouken@libsdl.org>
parents: 5262
diff changeset
   450
                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
   451
            }
2967
e4a469d6ddab Implemented SDL_SetWindowIcon(), with translucent icon support under X11.
Sam Lantinga <slouken@libsdl.org>
parents: 2920
diff changeset
   452
            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
   453
            if (!surface) {
2990
Sam Lantinga <slouken@libsdl.org>
parents: 2969
diff changeset
   454
                SDL_SetError("Couldn't convert image to %d bpp",
Sam Lantinga <slouken@libsdl.org>
parents: 2969
diff changeset
   455
                             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
   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
        }
c121d94672cb SDL 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
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   459
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
   460
    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
   461
        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
   462
c121d94672cb SDL 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
        /* 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
   464
        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
   465
        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
   466
        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
   467
        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
   468
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
   469
        /* 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
   470
        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
   471
        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
   472
        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
   473
        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
   474
        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
   475
        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
   476
        SDL_WriteLE32(dst, bfOffBits);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   477
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
   478
        /* 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
   479
        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
   480
        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
   481
        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
   482
        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
   483
        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
   484
        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
   485
        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
   486
        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
   487
        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
   488
        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
   489
            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
   490
        } 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
   491
            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
   492
        }
c121d94672cb SDL 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
        biClrImportant = 0;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   494
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
   495
        /* 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
   496
        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
   497
        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
   498
        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
   499
        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
   500
        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
   501
        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
   502
        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
   503
        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
   504
        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
   505
        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
   506
        SDL_WriteLE32(dst, biClrImportant);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   507
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
   508
        /* 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
   509
        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
   510
            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
   511
            int ncolors;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   512
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
   513
            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
   514
            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
   515
            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
   516
                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
   517
                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
   518
                SDL_RWwrite(dst, &colors[i].r, 1, 1);
7024
72cb3e205571 We're using the alpha component of the palette entries, let's name it appropriately.
Sam Lantinga <slouken@libsdl.org>
parents: 6885
diff changeset
   519
                SDL_RWwrite(dst, &colors[i].a, 1, 1);
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
   520
            }
c121d94672cb SDL 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
        }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   522
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
   523
        /* Write the bitmap offset */
6666
018f8019ce36 Reset the mouse button state when losing mouse focus.
Sam Lantinga <slouken@libsdl.org>
parents: 6389
diff changeset
   524
        bfOffBits = (Uint32)(SDL_RWtell(dst) - fp_offset);
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
   525
        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
   526
            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
   527
        }
c121d94672cb SDL 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
        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
   529
        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
   530
            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
   531
        }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   532
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
   533
        /* 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
   534
        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
   535
        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
   536
        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
   537
            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
   538
            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
   539
                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
   540
                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
   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
            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
   543
                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
   544
                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
   545
                    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
   546
                }
c121d94672cb SDL 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
            }
c121d94672cb SDL 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
        }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   549
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
   550
        /* Write the BMP file size */
6666
018f8019ce36 Reset the mouse button state when losing mouse focus.
Sam Lantinga <slouken@libsdl.org>
parents: 6389
diff changeset
   551
        bfSize = (Uint32)(SDL_RWtell(dst) - fp_offset);
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
   552
        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
   553
            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
   554
        }
c121d94672cb SDL 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_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
   556
        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
   557
            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
   558
        }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   559
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
   560
        /* 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
   561
        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
   562
        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
   563
            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
   564
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   565
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   566
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
   567
    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
   568
        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
   569
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   570
    return ((SDL_strcmp(SDL_GetError(), "") == 0) ? 0 : -1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   571
}
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
   572
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   573
/* vi: set ts=4 sw=4 expandtab: */