19682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 29682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL - Simple DirectMedia Layer 39682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Copyright (C) 1997-2012 Sam Lantinga 49682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 59682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is free software; you can redistribute it and/or 69682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall modify it under the terms of the GNU Lesser General Public 79682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License as published by the Free Software Foundation; either 89682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall version 2.1 of the License, or (at your option) any later version. 99682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is distributed in the hope that it will be useful, 119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall but WITHOUT ANY WARRANTY; without even the implied warranty of 129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Lesser General Public License for more details. 149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall You should have received a copy of the GNU Lesser General Public 169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License along with this library; if not, write to the Free Software 179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sam Lantinga 209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall slouken@libsdl.org 219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_config.h" 239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Code to load and save surfaces in Windows BMP format. 269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Why support BMP format? Well, it's a native format for Windows, and 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall most image processing programs can read and write it. It would be nice 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall to be able to have at least one image format that we can natively load 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall and save, and since PNG is so complex that it would bloat the library, 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall BMP is a good alternative. 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This code currently supports Win32 DIBs in uncompressed 8 and 24 bpp. 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_video.h" 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_endian.h" 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Compression encodings for BMP files */ 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifndef BI_RGB 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define BI_RGB 0 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define BI_RLE8 1 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define BI_RLE4 2 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define BI_BITFIELDS 3 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallSDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc) 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_bool was_error; 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall long fp_offset = 0; 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int bmpPitch; 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int i, pad; 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Surface *surface; 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 Rmask; 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 Gmask; 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 Bmask; 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Palette *palette; 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *bits; 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *top, *end; 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_bool topDown; 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int ExpandBMP; 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* The Win32 BMP file header (14 bytes) */ 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall char magic[2]; 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 bfSize; 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 bfReserved1; 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 bfReserved2; 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 bfOffBits; 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biSize; 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 biWidth; 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 biHeight; 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 biPlanes; 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 biBitCount; 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biCompression; 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biSizeImage; 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 biXPelsPerMeter; 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 biYPelsPerMeter; 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biClrUsed; 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biClrImportant; 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Make sure we are passed a valid data source */ 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall surface = NULL; 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_FALSE; 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( src == NULL ) { 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Read in the BMP file header */ 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall fp_offset = SDL_RWtell(src); 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_ClearError(); 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_RWread(src, magic, 1, 2) != 2 ) { 969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Error(SDL_EFREAD); 979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_strncmp(magic, "BM", 2) != 0 ) { 1019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("File is not a Windows BMP file"); 1029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 1039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 1049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfSize = SDL_ReadLE32(src); 1069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfReserved1 = SDL_ReadLE16(src); 1079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfReserved2 = SDL_ReadLE16(src); 1089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfOffBits = SDL_ReadLE32(src); 1099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Read the Win32 BITMAPINFOHEADER */ 1119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biSize = SDL_ReadLE32(src); 1129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( biSize == 12 ) { 1139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biWidth = (Uint32)SDL_ReadLE16(src); 1149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biHeight = (Uint32)SDL_ReadLE16(src); 1159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biPlanes = SDL_ReadLE16(src); 1169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biBitCount = SDL_ReadLE16(src); 1179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biCompression = BI_RGB; 1189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biSizeImage = 0; 1199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biXPelsPerMeter = 0; 1209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biYPelsPerMeter = 0; 1219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biClrUsed = 0; 1229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biClrImportant = 0; 1239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 1249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biWidth = SDL_ReadLE32(src); 1259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biHeight = SDL_ReadLE32(src); 1269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biPlanes = SDL_ReadLE16(src); 1279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biBitCount = SDL_ReadLE16(src); 1289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biCompression = SDL_ReadLE32(src); 1299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biSizeImage = SDL_ReadLE32(src); 1309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biXPelsPerMeter = SDL_ReadLE32(src); 1319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biYPelsPerMeter = SDL_ReadLE32(src); 1329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biClrUsed = SDL_ReadLE32(src); 1339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biClrImportant = SDL_ReadLE32(src); 1349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* stop some compiler warnings. */ 1379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (void) bfSize; 1389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (void) bfReserved1; 1399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (void) bfReserved2; 1409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (void) biPlanes; 1419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (void) biSizeImage; 1429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (void) biXPelsPerMeter; 1439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (void) biYPelsPerMeter; 1449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (void) biClrImportant; 1459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (biHeight < 0) { 1479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall topDown = SDL_TRUE; 1489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biHeight = -biHeight; 1499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 1509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall topDown = SDL_FALSE; 1519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Check for read error */ 1549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_strcmp(SDL_GetError(), "") != 0 ) { 1559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 1569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 1579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */ 1609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (biBitCount) { 1619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 1: 1629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 4: 1639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ExpandBMP = biBitCount; 1649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biBitCount = 8; 1659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 1679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ExpandBMP = 0; 1689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* We don't support any BMP compression right now */ 1729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Rmask = Gmask = Bmask = 0; 1739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (biCompression) { 1749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case BI_RGB: 1759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* If there are no masks, use the defaults */ 1769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( bfOffBits == (14+biSize) ) { 1779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Default values for the BMP format */ 1789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (biBitCount) { 1799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 15: 1809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 16: 1819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Rmask = 0x7C00; 1829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Gmask = 0x03E0; 1839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Bmask = 0x001F; 1849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 24: 1869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#if SDL_BYTEORDER == SDL_BIG_ENDIAN 1879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Rmask = 0x000000FF; 1889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Gmask = 0x0000FF00; 1899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Bmask = 0x00FF0000; 1909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 1929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 32: 1939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Rmask = 0x00FF0000; 1949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Gmask = 0x0000FF00; 1959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Bmask = 0x000000FF; 1969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 1989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 2019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Fall through -- read the RGB masks */ 2039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case BI_BITFIELDS: 2059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (biBitCount) { 2069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 15: 2079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 16: 2089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 32: 2099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Rmask = SDL_ReadLE32(src); 2109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Gmask = SDL_ReadLE32(src); 2119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Bmask = SDL_ReadLE32(src); 2129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 2139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 2149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 2159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 2179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 2189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Compressed BMP files not supported"); 2199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 2209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 2219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Create a compatible surface, note that the colors are RGB ordered */ 2249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 2259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biWidth, biHeight, biBitCount, Rmask, Gmask, Bmask, 0); 2269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface == NULL ) { 2279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 2289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 2299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Load the palette, if any */ 2329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall palette = (surface->format)->palette; 2339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( palette ) { 2349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( biClrUsed == 0 ) { 2359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biClrUsed = 1 << biBitCount; 2369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( biSize == 12 ) { 2389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( i = 0; i < (int)biClrUsed; ++i ) { 2399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWread(src, &palette->colors[i].b, 1, 1); 2409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWread(src, &palette->colors[i].g, 1, 1); 2419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWread(src, &palette->colors[i].r, 1, 1); 2429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall palette->colors[i].unused = 0; 2439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 2459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( i = 0; i < (int)biClrUsed; ++i ) { 2469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWread(src, &palette->colors[i].b, 1, 1); 2479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWread(src, &palette->colors[i].g, 1, 1); 2489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWread(src, &palette->colors[i].r, 1, 1); 2499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWread(src, &palette->colors[i].unused, 1, 1); 2509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall palette->ncolors = biClrUsed; 2539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Read the surface pixels. Note that the bmp image is upside down */ 2569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_RWseek(src, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) { 2579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Error(SDL_EFSEEK); 2589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 2599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 2609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall top = (Uint8 *)surface->pixels; 2629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall end = (Uint8 *)surface->pixels+(surface->h*surface->pitch); 2639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (ExpandBMP) { 2649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 1: 2659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bmpPitch = (biWidth + 7) >> 3; 2669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0); 2679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 2689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 4: 2699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bmpPitch = (biWidth + 1) >> 1; 2709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0); 2719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 2729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 2739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pad = ((surface->pitch%4) ? 2749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (4-(surface->pitch%4)) : 0); 2759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 2769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( topDown ) { 2789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits = top; 2799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 2809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits = end - surface->pitch; 2819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( bits >= top && bits < end ) { 2839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (ExpandBMP) { 2849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 1: 2859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 4: { 2869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 pixel = 0; 2879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int shift = (8-ExpandBMP); 2889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( i=0; i<surface->w; ++i ) { 2899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( i%(8/ExpandBMP) == 0 ) { 2909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( !SDL_RWread(src, &pixel, 1, 1) ) { 2919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError( 2929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall "Error reading from BMP"); 2939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 2949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 2959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(bits+i) = (pixel>>shift); 2989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pixel <<= ExpandBMP; 2999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } } 3009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 3019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 3039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_RWread(src, bits, 1, surface->pitch) 3049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall != surface->pitch ) { 3059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Error(SDL_EFREAD); 3069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall was_error = SDL_TRUE; 3079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall goto done; 3089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#if SDL_BYTEORDER == SDL_BIG_ENDIAN 3109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Byte-swap the pixels if needed. Note that the 24bpp 3119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case has already been taken care of above. */ 3129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch(biBitCount) { 3139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 15: 3149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 16: { 3159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 *pix = (Uint16 *)bits; 3169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for(i = 0; i < surface->w; i++) 3179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pix[i] = SDL_Swap16(pix[i]); 3189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 3199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 32: { 3229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 *pix = (Uint32 *)bits; 3239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for(i = 0; i < surface->w; i++) 3249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pix[i] = SDL_Swap32(pix[i]); 3259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 3269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 3299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 3309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Skip padding bytes, ugh */ 3329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( pad ) { 3339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 padbyte; 3349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( i=0; i<pad; ++i ) { 3359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWread(src, &padbyte, 1, 1); 3369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( topDown ) { 3399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits += surface->pitch; 3409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 3419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits -= surface->pitch; 3429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Halldone: 3459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( was_error ) { 3469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( src ) { 3479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWseek(src, fp_offset, RW_SEEK_SET); 3489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface ) { 3509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_FreeSurface(surface); 3519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall surface = NULL; 3539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( freesrc && src ) { 3559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWclose(src); 3569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(surface); 3589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint SDL_SaveBMP_RW (SDL_Surface *saveme, SDL_RWops *dst, int freedst) 3619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall long fp_offset; 3639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int i, pad; 3649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Surface *surface; 3659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *bits; 3669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* The Win32 BMP file header (14 bytes) */ 3689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall char magic[2] = { 'B', 'M' }; 3699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 bfSize; 3709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 bfReserved1; 3719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 bfReserved2; 3729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 bfOffBits; 3739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ 3759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biSize; 3769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 biWidth; 3779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 biHeight; 3789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 biPlanes; 3799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 biBitCount; 3809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biCompression; 3819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biSizeImage; 3829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 biXPelsPerMeter; 3839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 biYPelsPerMeter; 3849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biClrUsed; 3859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 biClrImportant; 3869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Make sure we have somewhere to save */ 3889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall surface = NULL; 3899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( dst ) { 3909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( saveme->format->palette ) { 3919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( saveme->format->BitsPerPixel == 8 ) { 3929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall surface = saveme; 3939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 3949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("%d bpp BMP files not supported", 3959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall saveme->format->BitsPerPixel); 3969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall else if ( (saveme->format->BitsPerPixel == 24) && 3999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#if SDL_BYTEORDER == SDL_LIL_ENDIAN 4009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (saveme->format->Rmask == 0x00FF0000) && 4019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (saveme->format->Gmask == 0x0000FF00) && 4029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (saveme->format->Bmask == 0x000000FF) 4039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 4049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (saveme->format->Rmask == 0x000000FF) && 4059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (saveme->format->Gmask == 0x0000FF00) && 4069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (saveme->format->Bmask == 0x00FF0000) 4079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 4089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ) { 4099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall surface = saveme; 4109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 4119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Rect bounds; 4129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Convert to 24 bits per pixel */ 4149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 4159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall saveme->w, saveme->h, 24, 4169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#if SDL_BYTEORDER == SDL_LIL_ENDIAN 4179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 0x00FF0000, 0x0000FF00, 0x000000FF, 4189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 4199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 0x000000FF, 0x0000FF00, 0x00FF0000, 4209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 4219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 0); 4229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface != NULL ) { 4239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bounds.x = 0; 4249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bounds.y = 0; 4259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bounds.w = saveme->w; 4269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bounds.h = saveme->h; 4279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_LowerBlit(saveme, &bounds, surface, 4289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall &bounds) < 0 ) { 4299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_FreeSurface(surface); 4309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError( 4319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall "Couldn't convert image to 24 bpp"); 4329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall surface = NULL; 4339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface && (SDL_LockSurface(surface) == 0) ) { 4399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const int bw = surface->w*surface->format->BytesPerPixel; 4409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set the BMP file header values */ 4429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfSize = 0; /* We'll write this when we're done */ 4439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfReserved1 = 0; 4449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfReserved2 = 0; 4459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfOffBits = 0; /* We'll write this when we're done */ 4469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Write the BMP file header values */ 4489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall fp_offset = SDL_RWtell(dst); 4499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_ClearError(); 4509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWwrite(dst, magic, 2, 1); 4519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, bfSize); 4529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE16(dst, bfReserved1); 4539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE16(dst, bfReserved2); 4549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, bfOffBits); 4559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set the BMP info values */ 4579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biSize = 40; 4589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biWidth = surface->w; 4599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biHeight = surface->h; 4609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biPlanes = 1; 4619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biBitCount = surface->format->BitsPerPixel; 4629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biCompression = BI_RGB; 4639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biSizeImage = surface->h*surface->pitch; 4649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biXPelsPerMeter = 0; 4659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biYPelsPerMeter = 0; 4669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface->format->palette ) { 4679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biClrUsed = surface->format->palette->ncolors; 4689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 4699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biClrUsed = 0; 4709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall biClrImportant = 0; 4729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Write the BMP info values */ 4749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biSize); 4759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biWidth); 4769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biHeight); 4779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE16(dst, biPlanes); 4789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE16(dst, biBitCount); 4799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biCompression); 4809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biSizeImage); 4819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biXPelsPerMeter); 4829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biYPelsPerMeter); 4839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biClrUsed); 4849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, biClrImportant); 4859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Write the palette (in BGR color order) */ 4879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface->format->palette ) { 4889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Color *colors; 4899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int ncolors; 4909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall colors = surface->format->palette->colors; 4929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ncolors = surface->format->palette->ncolors; 4939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( i=0; i<ncolors; ++i ) { 4949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWwrite(dst, &colors[i].b, 1, 1); 4959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWwrite(dst, &colors[i].g, 1, 1); 4969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWwrite(dst, &colors[i].r, 1, 1); 4979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWwrite(dst, &colors[i].unused, 1, 1); 4989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Write the bitmap offset */ 5029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfOffBits = SDL_RWtell(dst)-fp_offset; 5039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_RWseek(dst, fp_offset+10, RW_SEEK_SET) < 0 ) { 5049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Error(SDL_EFSEEK); 5059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, bfOffBits); 5079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_RWseek(dst, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) { 5089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Error(SDL_EFSEEK); 5099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Write the bitmap image upside down */ 5129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits = (Uint8 *)surface->pixels+(surface->h*surface->pitch); 5139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pad = ((bw%4) ? (4-(bw%4)) : 0); 5149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( bits > (Uint8 *)surface->pixels ) { 5159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits -= surface->pitch; 5169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_RWwrite(dst, bits, 1, bw) != bw) { 5179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Error(SDL_EFWRITE); 5189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 5199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( pad ) { 5219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const Uint8 padbyte = 0; 5229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( i=0; i<pad; ++i ) { 5239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWwrite(dst, &padbyte, 1, 1); 5249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Write the BMP file size */ 5299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bfSize = SDL_RWtell(dst)-fp_offset; 5309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_RWseek(dst, fp_offset+2, RW_SEEK_SET) < 0 ) { 5319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Error(SDL_EFSEEK); 5329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_WriteLE32(dst, bfSize); 5349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_RWseek(dst, fp_offset+bfSize, RW_SEEK_SET) < 0 ) { 5359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Error(SDL_EFSEEK); 5369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Close it up.. */ 5399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_UnlockSurface(surface); 5409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface != saveme ) { 5419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_FreeSurface(surface); 5429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( freedst && dst ) { 5469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_RWclose(dst); 5479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return((SDL_strcmp(SDL_GetError(), "") == 0) ? 0 : -1); 5499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 550