846 lines
21 KiB
C
846 lines
21 KiB
C
/*
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SDL_image: An example image loading library for use with SDL
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Copyright (C) 1997-2009 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#if !defined(__APPLE__) || defined(SDL_IMAGE_USE_COMMON_BACKEND)
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/* This is a BMP image file loading framework */
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/* ICO/CUR file support is here as well since it uses similar internal
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* representation */
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#include <stdio.h>
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#include <string.h>
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#include "SDL_image.h"
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#ifdef LOAD_BMP
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/* See if an image is contained in a data source */
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int IMG_isBMP(SDL_RWops *src)
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{
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int start;
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int is_BMP;
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char magic[2];
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if ( !src )
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return 0;
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start = SDL_RWtell(src);
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is_BMP = 0;
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if ( SDL_RWread(src, magic, sizeof(magic), 1) ) {
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if ( strncmp(magic, "BM", 2) == 0 ) {
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is_BMP = 1;
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}
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}
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SDL_RWseek(src, start, RW_SEEK_SET);
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return(is_BMP);
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}
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static int IMG_isICOCUR(SDL_RWops *src, int type)
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{
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int start;
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int is_ICOCUR;
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/* The Win32 ICO file header (14 bytes) */
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Uint16 bfReserved;
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Uint16 bfType;
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Uint16 bfCount;
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if ( !src )
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return 0;
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start = SDL_RWtell(src);
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is_ICOCUR = 0;
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bfReserved = SDL_ReadLE16(src);
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bfType = SDL_ReadLE16(src);
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bfCount = SDL_ReadLE16(src);
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if ((bfReserved == 0) && (bfType == type) && (bfCount != 0))
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is_ICOCUR = 1;
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SDL_RWseek(src, start, RW_SEEK_SET);
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return (is_ICOCUR);
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}
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int IMG_isICO(SDL_RWops *src)
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{
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return IMG_isICOCUR(src, 1);
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}
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int IMG_isCUR(SDL_RWops *src)
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{
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return IMG_isICOCUR(src, 2);
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}
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#include "SDL_error.h"
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#include "SDL_video.h"
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#include "SDL_endian.h"
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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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static int readRlePixels(SDL_Surface * surface, SDL_RWops * src, int isRle8)
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{
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/*
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| Sets the surface pixels from src. A bmp image is upside down.
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*/
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int pitch = surface->pitch;
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int height = surface->h;
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Uint8 *start = (Uint8 *)surface->pixels;
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Uint8 *end = start + (height*pitch);
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Uint8 *bits = end-pitch, *spot;
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int ofs = 0;
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Uint8 ch;
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Uint8 needsPad;
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#define COPY_PIXEL(x) spot = &bits[ofs++]; if(spot >= start && spot < end) *spot = (x)
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for (;;) {
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if ( !SDL_RWread(src, &ch, 1, 1) ) return 1;
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/*
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| encoded mode starts with a run length, and then a byte
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| with two colour indexes to alternate between for the run
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*/
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if ( ch ) {
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Uint8 pixel;
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if ( !SDL_RWread(src, &pixel, 1, 1) ) return 1;
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if ( isRle8 ) { /* 256-color bitmap, compressed */
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do {
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COPY_PIXEL(pixel);
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} while (--ch);
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} else { /* 16-color bitmap, compressed */
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Uint8 pixel0 = pixel >> 4;
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Uint8 pixel1 = pixel & 0x0F;
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for (;;) {
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COPY_PIXEL(pixel0); /* even count, high nibble */
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if (!--ch) break;
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COPY_PIXEL(pixel1); /* odd count, low nibble */
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if (!--ch) break;
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}
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}
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} else {
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/*
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| A leading zero is an escape; it may signal the end of the bitmap,
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| a cursor move, or some absolute data.
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| zero tag may be absolute mode or an escape
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*/
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if ( !SDL_RWread(src, &ch, 1, 1) ) return 1;
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switch (ch) {
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case 0: /* end of line */
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ofs = 0;
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bits -= pitch; /* go to previous */
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break;
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case 1: /* end of bitmap */
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return 0; /* success! */
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case 2: /* delta */
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if ( !SDL_RWread(src, &ch, 1, 1) ) return 1;
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ofs += ch;
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if ( !SDL_RWread(src, &ch, 1, 1) ) return 1;
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bits -= (ch * pitch);
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break;
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default: /* no compression */
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if (isRle8) {
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needsPad = ( ch & 1 );
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do {
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Uint8 pixel;
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if ( !SDL_RWread(src, &pixel, 1, 1) ) return 1;
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COPY_PIXEL(pixel);
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} while (--ch);
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} else {
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needsPad = ( ((ch+1)>>1) & 1 ); /* (ch+1)>>1: bytes size */
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for (;;) {
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Uint8 pixel;
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if ( !SDL_RWread(src, &pixel, 1, 1) ) return 1;
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COPY_PIXEL(pixel >> 4);
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if (!--ch) break;
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COPY_PIXEL(pixel & 0x0F);
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if (!--ch) break;
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}
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}
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/* pad at even boundary */
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if ( needsPad && !SDL_RWread(src, &ch, 1, 1) ) return 1;
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break;
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}
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}
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}
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}
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static SDL_Surface *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;
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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;
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Uint16 bfReserved1;
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Uint16 bfReserved2;
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Uint32 bfOffBits;
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/* The Win32 BITMAPINFOHEADER struct (40 bytes) */
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Uint32 biSize;
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Sint32 biWidth;
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Sint32 biHeight;
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Uint16 biPlanes;
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Uint16 biBitCount;
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Uint32 biCompression;
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Uint32 biSizeImage;
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Sint32 biXPelsPerMeter;
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Sint32 biYPelsPerMeter;
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Uint32 biClrUsed;
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Uint32 biClrImportant;
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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 ( 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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biSizeImage = 0;
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biXPelsPerMeter = 0;
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biYPelsPerMeter = 0;
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biClrUsed = 0;
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biClrImportant = 0;
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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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biCompression = SDL_ReadLE32(src);
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biSizeImage = SDL_ReadLE32(src);
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biXPelsPerMeter = SDL_ReadLE32(src);
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biYPelsPerMeter = SDL_ReadLE32(src);
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biClrUsed = SDL_ReadLE32(src);
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biClrImportant = SDL_ReadLE32(src);
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}
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if (biHeight < 0) {
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topDown = SDL_TRUE;
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biHeight = -biHeight;
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} else {
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topDown = SDL_FALSE;
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}
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/* Check for read error */
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if ( strcmp(SDL_GetError(), "") != 0 ) {
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was_error = SDL_TRUE;
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goto done;
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}
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/* Expand 1 and 4 bit bitmaps to 8 bits per pixel */
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switch (biBitCount) {
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case 1:
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case 4:
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ExpandBMP = biBitCount;
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biBitCount = 8;
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break;
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default:
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ExpandBMP = 0;
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break;
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}
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/* RLE4 and RLE8 BMP compression is supported */
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Rmask = Gmask = Bmask = Amask = 0;
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switch (biCompression) {
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case BI_RGB:
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/* If there are no masks, use the defaults */
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if ( bfOffBits == (14+biSize) ) {
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/* Default values for the BMP format */
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switch (biBitCount) {
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case 15:
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case 16:
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Rmask = 0x7C00;
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Gmask = 0x03E0;
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Bmask = 0x001F;
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break;
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case 24:
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#if SDL_BYTEORDER == SDL_BIG_ENDIAN
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Rmask = 0x000000FF;
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Gmask = 0x0000FF00;
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Bmask = 0x00FF0000;
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#else
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Rmask = 0x00FF0000;
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Gmask = 0x0000FF00;
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Bmask = 0x000000FF;
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#endif
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break;
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case 32:
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Amask = 0xFF000000;
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Rmask = 0x00FF0000;
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Gmask = 0x0000FF00;
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Bmask = 0x000000FF;
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break;
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default:
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break;
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}
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break;
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}
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/* Fall through -- read the RGB masks */
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default:
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switch (biBitCount) {
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case 15:
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case 16:
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case 32:
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Rmask = SDL_ReadLE32(src);
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Gmask = SDL_ReadLE32(src);
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Bmask = SDL_ReadLE32(src);
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Amask = SDL_ReadLE32(src);
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break;
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default:
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break;
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}
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break;
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}
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/* Create a compatible surface, note that the colors are RGB ordered */
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surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
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biWidth, biHeight, biBitCount, Rmask, Gmask, Bmask, Amask);
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if ( surface == NULL ) {
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was_error = SDL_TRUE;
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goto done;
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}
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/* Load the palette, if any */
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palette = (surface->format)->palette;
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if ( palette ) {
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if ( SDL_RWseek(src, fp_offset+14+biSize, RW_SEEK_SET) < 0 ) {
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SDL_Error(SDL_EFSEEK);
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was_error = SDL_TRUE;
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goto done;
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}
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/*
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| guich: always use 1<<bpp b/c some bitmaps can bring wrong information
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| for colorsUsed
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*/
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/* if ( biClrUsed == 0 ) { */
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biClrUsed = 1 << biBitCount;
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/* } */
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if ( biSize == 12 ) {
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for ( i = 0; i < (int)biClrUsed; ++i ) {
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SDL_RWread(src, &palette->colors[i].b, 1, 1);
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SDL_RWread(src, &palette->colors[i].g, 1, 1);
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SDL_RWread(src, &palette->colors[i].r, 1, 1);
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palette->colors[i].unused = 0;
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}
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} else {
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for ( i = 0; i < (int)biClrUsed; ++i ) {
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SDL_RWread(src, &palette->colors[i].b, 1, 1);
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SDL_RWread(src, &palette->colors[i].g, 1, 1);
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SDL_RWread(src, &palette->colors[i].r, 1, 1);
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SDL_RWread(src, &palette->colors[i].unused, 1, 1);
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}
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}
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palette->ncolors = biClrUsed;
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}
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/* Read the surface pixels. Note that the bmp image is upside down */
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if ( SDL_RWseek(src, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) {
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SDL_Error(SDL_EFSEEK);
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was_error = SDL_TRUE;
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goto done;
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}
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if ((biCompression == BI_RLE4) || (biCompression == BI_RLE8)) {
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was_error = readRlePixels(surface, src, biCompression == BI_RLE8);
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if (was_error) SDL_SetError("Error reading from BMP");
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goto done;
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}
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top = (Uint8 *)surface->pixels;
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end = (Uint8 *)surface->pixels+(surface->h*surface->pitch);
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switch (ExpandBMP) {
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case 1:
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bmpPitch = (biWidth + 7) >> 3;
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pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0);
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break;
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case 4:
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bmpPitch = (biWidth + 1) >> 1;
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pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0);
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break;
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default:
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pad = ((surface->pitch%4) ?
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(4-(surface->pitch%4)) : 0);
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break;
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}
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if ( topDown ) {
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bits = top;
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} else {
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bits = end - surface->pitch;
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}
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while ( bits >= top && bits < end ) {
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switch (ExpandBMP) {
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case 1:
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case 4: {
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Uint8 pixel = 0;
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int shift = (8-ExpandBMP);
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for ( i=0; i<surface->w; ++i ) {
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if ( i%(8/ExpandBMP) == 0 ) {
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if ( !SDL_RWread(src, &pixel, 1, 1) ) {
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SDL_SetError(
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"Error reading from BMP");
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was_error = SDL_TRUE;
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goto done;
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}
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}
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*(bits+i) = (pixel>>shift);
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pixel <<= ExpandBMP;
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} }
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break;
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default:
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if ( SDL_RWread(src, bits, 1, surface->pitch)
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!= surface->pitch ) {
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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_BYTEORDER == SDL_BIG_ENDIAN
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/* Byte-swap the pixels if needed. Note that the 24bpp
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case has already been taken care of above. */
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switch(biBitCount) {
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case 15:
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case 16: {
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Uint16 *pix = (Uint16 *)bits;
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for(i = 0; i < surface->w; i++)
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pix[i] = SDL_Swap16(pix[i]);
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break;
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}
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case 32: {
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Uint32 *pix = (Uint32 *)bits;
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for(i = 0; i < surface->w; i++)
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pix[i] = SDL_Swap32(pix[i]);
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break;
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}
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}
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#endif
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break;
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}
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/* Skip padding bytes, ugh */
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if ( pad ) {
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Uint8 padbyte;
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for ( i=0; i<pad; ++i ) {
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SDL_RWread(src, &padbyte, 1, 1);
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}
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}
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if ( topDown ) {
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bits += surface->pitch;
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} else {
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bits -= surface->pitch;
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}
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}
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done:
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if ( was_error ) {
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if ( src ) {
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SDL_RWseek(src, fp_offset, RW_SEEK_SET);
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}
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if ( surface ) {
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SDL_FreeSurface(surface);
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}
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surface = NULL;
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}
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if ( freesrc && src ) {
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SDL_RWclose(src);
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}
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return(surface);
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}
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static Uint8
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SDL_Read8(SDL_RWops * src)
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{
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Uint8 value;
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SDL_RWread(src, &value, 1, 1);
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return (value);
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}
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static SDL_Surface *
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LoadICOCUR_RW(SDL_RWops * src, int type, int freesrc)
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{
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SDL_bool was_error;
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long fp_offset;
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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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Uint8 *bits;
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int ExpandBMP;
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int maxCol = 0;
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int icoOfs = 0;
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Uint32 palette[256];
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/* The Win32 ICO file header (14 bytes) */
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Uint16 bfReserved;
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Uint16 bfType;
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Uint16 bfCount;
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|
|
/* The Win32 BITMAPINFOHEADER struct (40 bytes) */
|
|
Uint32 biSize;
|
|
Sint32 biWidth;
|
|
Sint32 biHeight;
|
|
Uint16 biPlanes;
|
|
Uint16 biBitCount;
|
|
Uint32 biCompression;
|
|
Uint32 biSizeImage;
|
|
Sint32 biXPelsPerMeter;
|
|
Sint32 biYPelsPerMeter;
|
|
Uint32 biClrUsed;
|
|
Uint32 biClrImportant;
|
|
|
|
/* Make sure we are passed a valid data source */
|
|
surface = NULL;
|
|
was_error = SDL_FALSE;
|
|
if (src == NULL) {
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
|
|
/* Read in the ICO file header */
|
|
fp_offset = SDL_RWtell(src);
|
|
SDL_ClearError();
|
|
|
|
bfReserved = SDL_ReadLE16(src);
|
|
bfType = SDL_ReadLE16(src);
|
|
bfCount = SDL_ReadLE16(src);
|
|
if ((bfReserved != 0) || (bfType != type) || (bfCount == 0)) {
|
|
SDL_SetError("File is not a Windows %s file", type == 1 ? "ICO" : "CUR");
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
|
|
/* Read the Win32 Icon Directory */
|
|
for (i = 0; i < bfCount; i++) {
|
|
/* Icon Directory Entries */
|
|
int bWidth = SDL_Read8(src); /* Uint8, but 0 = 256 ! */
|
|
int bHeight = SDL_Read8(src); /* Uint8, but 0 = 256 ! */
|
|
int bColorCount = SDL_Read8(src); /* Uint8, but 0 = 256 ! */
|
|
Uint8 bReserved = SDL_Read8(src);
|
|
Uint16 wPlanes = SDL_ReadLE16(src);
|
|
Uint16 wBitCount = SDL_ReadLE16(src);
|
|
Uint32 dwBytesInRes = SDL_ReadLE32(src);
|
|
Uint32 dwImageOffset = SDL_ReadLE32(src);
|
|
|
|
if (!bWidth)
|
|
bWidth = 256;
|
|
if (!bHeight)
|
|
bHeight = 256;
|
|
if (!bColorCount)
|
|
bColorCount = 256;
|
|
|
|
//printf("%dx%d@%d - %08x\n", bWidth, bHeight, bColorCount, dwImageOffset);
|
|
if (bColorCount > maxCol) {
|
|
maxCol = bColorCount;
|
|
icoOfs = dwImageOffset;
|
|
//printf("marked\n");
|
|
}
|
|
}
|
|
|
|
/* Advance to the DIB Data */
|
|
if (SDL_RWseek(src, icoOfs, RW_SEEK_SET) < 0) {
|
|
SDL_Error(SDL_EFSEEK);
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
|
|
/* Read the Win32 BITMAPINFOHEADER */
|
|
biSize = SDL_ReadLE32(src);
|
|
if (biSize == 40) {
|
|
biWidth = SDL_ReadLE32(src);
|
|
biHeight = SDL_ReadLE32(src);
|
|
biPlanes = SDL_ReadLE16(src);
|
|
biBitCount = SDL_ReadLE16(src);
|
|
biCompression = SDL_ReadLE32(src);
|
|
biSizeImage = SDL_ReadLE32(src);
|
|
biXPelsPerMeter = SDL_ReadLE32(src);
|
|
biYPelsPerMeter = SDL_ReadLE32(src);
|
|
biClrUsed = SDL_ReadLE32(src);
|
|
biClrImportant = SDL_ReadLE32(src);
|
|
} else {
|
|
SDL_SetError("Unsupported ICO bitmap format");
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
|
|
/* Check for read error */
|
|
if (SDL_strcmp(SDL_GetError(), "") != 0) {
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
|
|
/* We don't support any BMP compression right now */
|
|
switch (biCompression) {
|
|
case BI_RGB:
|
|
/* Default values for the BMP format */
|
|
switch (biBitCount) {
|
|
case 1:
|
|
case 4:
|
|
ExpandBMP = biBitCount;
|
|
biBitCount = 8;
|
|
break;
|
|
case 8:
|
|
ExpandBMP = 8;
|
|
break;
|
|
case 32:
|
|
Rmask = 0x00FF0000;
|
|
Gmask = 0x0000FF00;
|
|
Bmask = 0x000000FF;
|
|
ExpandBMP = 0;
|
|
break;
|
|
default:
|
|
SDL_SetError("ICO file with unsupported bit count");
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
break;
|
|
default:
|
|
SDL_SetError("Compressed ICO files not supported");
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
|
|
/* Create a RGBA surface */
|
|
biHeight = biHeight >> 1;
|
|
//printf("%d x %d\n", biWidth, biHeight);
|
|
surface =
|
|
SDL_CreateRGBSurface(0, biWidth, biHeight, 32, 0x00FF0000,
|
|
0x0000FF00, 0x000000FF, 0xFF000000);
|
|
if (surface == NULL) {
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
|
|
/* Load the palette, if any */
|
|
//printf("bc %d bused %d\n", biBitCount, biClrUsed);
|
|
if (biBitCount <= 8) {
|
|
if (biClrUsed == 0) {
|
|
biClrUsed = 1 << biBitCount;
|
|
}
|
|
for (i = 0; i < (int) biClrUsed; ++i) {
|
|
SDL_RWread(src, &palette[i], 4, 1);
|
|
}
|
|
}
|
|
|
|
/* Read the surface pixels. Note that the bmp image is upside down */
|
|
bits = (Uint8 *) surface->pixels + (surface->h * surface->pitch);
|
|
switch (ExpandBMP) {
|
|
case 1:
|
|
bmpPitch = (biWidth + 7) >> 3;
|
|
pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
|
|
break;
|
|
case 4:
|
|
bmpPitch = (biWidth + 1) >> 1;
|
|
pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
|
|
break;
|
|
case 8:
|
|
bmpPitch = biWidth;
|
|
pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
|
|
break;
|
|
default:
|
|
bmpPitch = biWidth * 4;
|
|
pad = 0;
|
|
break;
|
|
}
|
|
while (bits > (Uint8 *) surface->pixels) {
|
|
bits -= surface->pitch;
|
|
switch (ExpandBMP) {
|
|
case 1:
|
|
case 4:
|
|
case 8:
|
|
{
|
|
Uint8 pixel = 0;
|
|
int shift = (8 - ExpandBMP);
|
|
for (i = 0; i < surface->w; ++i) {
|
|
if (i % (8 / ExpandBMP) == 0) {
|
|
if (!SDL_RWread(src, &pixel, 1, 1)) {
|
|
SDL_SetError("Error reading from ICO");
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
}
|
|
*((Uint32 *) bits + i) = (palette[pixel >> shift]);
|
|
pixel <<= ExpandBMP;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (SDL_RWread(src, bits, 1, surface->pitch)
|
|
!= surface->pitch) {
|
|
SDL_Error(SDL_EFREAD);
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
break;
|
|
}
|
|
/* Skip padding bytes, ugh */
|
|
if (pad) {
|
|
Uint8 padbyte;
|
|
for (i = 0; i < pad; ++i) {
|
|
SDL_RWread(src, &padbyte, 1, 1);
|
|
}
|
|
}
|
|
}
|
|
/* Read the mask pixels. Note that the bmp image is upside down */
|
|
bits = (Uint8 *) surface->pixels + (surface->h * surface->pitch);
|
|
ExpandBMP = 1;
|
|
bmpPitch = (biWidth + 7) >> 3;
|
|
pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
|
|
while (bits > (Uint8 *) surface->pixels) {
|
|
Uint8 pixel = 0;
|
|
int shift = (8 - ExpandBMP);
|
|
|
|
bits -= surface->pitch;
|
|
for (i = 0; i < surface->w; ++i) {
|
|
if (i % (8 / ExpandBMP) == 0) {
|
|
if (!SDL_RWread(src, &pixel, 1, 1)) {
|
|
SDL_SetError("Error reading from ICO");
|
|
was_error = SDL_TRUE;
|
|
goto done;
|
|
}
|
|
}
|
|
*((Uint32 *) bits + i) |= ((pixel >> shift) ? 0 : 0xFF000000);
|
|
pixel <<= ExpandBMP;
|
|
}
|
|
/* Skip padding bytes, ugh */
|
|
if (pad) {
|
|
Uint8 padbyte;
|
|
for (i = 0; i < pad; ++i) {
|
|
SDL_RWread(src, &padbyte, 1, 1);
|
|
}
|
|
}
|
|
}
|
|
done:
|
|
if (was_error) {
|
|
if (src) {
|
|
SDL_RWseek(src, fp_offset, RW_SEEK_SET);
|
|
}
|
|
if (surface) {
|
|
SDL_FreeSurface(surface);
|
|
}
|
|
surface = NULL;
|
|
}
|
|
if (freesrc && src) {
|
|
SDL_RWclose(src);
|
|
}
|
|
return (surface);
|
|
}
|
|
|
|
/* Load a BMP type image from an SDL datasource */
|
|
SDL_Surface *IMG_LoadBMP_RW(SDL_RWops *src)
|
|
{
|
|
return(LoadBMP_RW(src, 0));
|
|
}
|
|
|
|
/* Load a ICO type image from an SDL datasource */
|
|
SDL_Surface *IMG_LoadICO_RW(SDL_RWops *src)
|
|
{
|
|
return(LoadICOCUR_RW(src, 1, 0));
|
|
}
|
|
|
|
/* Load a CUR type image from an SDL datasource */
|
|
SDL_Surface *IMG_LoadCUR_RW(SDL_RWops *src)
|
|
{
|
|
return(LoadICOCUR_RW(src, 2, 0));
|
|
}
|
|
|
|
#else
|
|
|
|
/* See if an image is contained in a data source */
|
|
int IMG_isBMP(SDL_RWops *src)
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
int IMG_isICO(SDL_RWops *src)
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
int IMG_isCUR(SDL_RWops *src)
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
/* Load a BMP type image from an SDL datasource */
|
|
SDL_Surface *IMG_LoadBMP_RW(SDL_RWops *src)
|
|
{
|
|
return(NULL);
|
|
}
|
|
|
|
/* Load a BMP type image from an SDL datasource */
|
|
SDL_Surface *IMG_LoadCUR_RW(SDL_RWops *src)
|
|
{
|
|
return(NULL);
|
|
}
|
|
|
|
/* Load a BMP type image from an SDL datasource */
|
|
SDL_Surface *IMG_LoadICO_RW(SDL_RWops *src)
|
|
{
|
|
return(NULL);
|
|
}
|
|
|
|
#endif /* LOAD_BMP */
|
|
|
|
#endif /* !defined(__APPLE__) || defined(SDL_IMAGE_USE_COMMON_BACKEND) */
|