annotate src/video/SDL_bmp.c @ 4414:2e253188dcd2 SDL-1.2-olpc

Closing obsolete SDL-1.2-olpc named branch
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 28 Feb 2010 00:21:35 -0500
parents d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
0
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7 License as published by the Free Software Foundation; either
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c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
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8 version 2.1 of the License, or (at your option) any later version.
0
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
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parents: 1012
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13 Lesser General Public License for more details.
0
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14
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Sam Lantinga <slouken@libsdl.org>
parents: 1012
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15 You should have received a copy of the GNU Lesser General Public
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
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parents: 1012
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16 License along with this library; if not, write to the Free Software
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
0
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23
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24 /*
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25 Code to load and save surfaces in Windows BMP format.
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26
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27 Why support BMP format? Well, it's a native format for Windows, and
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28 most image processing programs can read and write it. It would be nice
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29 to be able to have at least one image format that we can natively load
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30 and save, and since PNG is so complex that it would bloat the library,
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31 BMP is a good alternative.
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32
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33 This code currently supports Win32 DIBs in uncompressed 8 and 24 bpp.
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34 */
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35
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36 #include "SDL_video.h"
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37 #include "SDL_endian.h"
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38
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39 /* Compression encodings for BMP files */
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40 #ifndef BI_RGB
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41 #define BI_RGB 0
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42 #define BI_RLE8 1
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43 #define BI_RLE4 2
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44 #define BI_BITFIELDS 3
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45 #endif
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46
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47
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48 SDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc)
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49 {
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50 int was_error;
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51 long fp_offset;
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52 int bmpPitch;
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53 int i, pad;
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54 SDL_Surface *surface;
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55 Uint32 Rmask;
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56 Uint32 Gmask;
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57 Uint32 Bmask;
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58 SDL_Palette *palette;
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59 Uint8 *bits;
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60 int ExpandBMP;
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61
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62 /* The Win32 BMP file header (14 bytes) */
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63 char magic[2];
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64 Uint32 bfSize;
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65 Uint16 bfReserved1;
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66 Uint16 bfReserved2;
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67 Uint32 bfOffBits;
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68
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69 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */
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70 Uint32 biSize;
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71 Sint32 biWidth;
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72 Sint32 biHeight;
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73 Uint16 biPlanes;
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74 Uint16 biBitCount;
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75 Uint32 biCompression;
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76 Uint32 biSizeImage;
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77 Sint32 biXPelsPerMeter;
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78 Sint32 biYPelsPerMeter;
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79 Uint32 biClrUsed;
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80 Uint32 biClrImportant;
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81
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82 /* Make sure we are passed a valid data source */
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83 surface = NULL;
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84 was_error = 0;
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85 if ( src == NULL ) {
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86 was_error = 1;
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87 goto done;
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88 }
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89
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90 /* Read in the BMP file header */
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91 fp_offset = SDL_RWtell(src);
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92 SDL_ClearError();
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93 if ( SDL_RWread(src, magic, 1, 2) != 2 ) {
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94 SDL_Error(SDL_EFREAD);
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95 was_error = 1;
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96 goto done;
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97 }
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Sam Lantinga <slouken@libsdl.org>
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98 if ( SDL_strncmp(magic, "BM", 2) != 0 ) {
0
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99 SDL_SetError("File is not a Windows BMP file");
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100 was_error = 1;
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101 goto done;
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102 }
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103 bfSize = SDL_ReadLE32(src);
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104 bfReserved1 = SDL_ReadLE16(src);
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105 bfReserved2 = SDL_ReadLE16(src);
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106 bfOffBits = SDL_ReadLE32(src);
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107
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108 /* Read the Win32 BITMAPINFOHEADER */
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109 biSize = SDL_ReadLE32(src);
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110 if ( biSize == 12 ) {
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111 biWidth = (Uint32)SDL_ReadLE16(src);
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112 biHeight = (Uint32)SDL_ReadLE16(src);
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113 biPlanes = SDL_ReadLE16(src);
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114 biBitCount = SDL_ReadLE16(src);
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115 biCompression = BI_RGB;
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116 biSizeImage = 0;
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117 biXPelsPerMeter = 0;
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118 biYPelsPerMeter = 0;
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119 biClrUsed = 0;
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120 biClrImportant = 0;
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121 } else {
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122 biWidth = SDL_ReadLE32(src);
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123 biHeight = SDL_ReadLE32(src);
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124 biPlanes = SDL_ReadLE16(src);
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125 biBitCount = SDL_ReadLE16(src);
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126 biCompression = SDL_ReadLE32(src);
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127 biSizeImage = SDL_ReadLE32(src);
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128 biXPelsPerMeter = SDL_ReadLE32(src);
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129 biYPelsPerMeter = SDL_ReadLE32(src);
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130 biClrUsed = SDL_ReadLE32(src);
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131 biClrImportant = SDL_ReadLE32(src);
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132 }
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133
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134 /* Check for read error */
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135 if ( SDL_strcmp(SDL_GetError(), "") != 0 ) {
0
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136 was_error = 1;
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137 goto done;
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138 }
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139
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140 /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */
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141 switch (biBitCount) {
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142 case 1:
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143 case 4:
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144 ExpandBMP = biBitCount;
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145 biBitCount = 8;
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146 break;
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147 default:
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148 ExpandBMP = 0;
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149 break;
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150 }
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151
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152 /* We don't support any BMP compression right now */
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153 Rmask = Gmask = Bmask = 0;
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154 switch (biCompression) {
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155 case BI_RGB:
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156 /* If there are no masks, use the defaults */
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157 if ( bfOffBits == (14+biSize) ) {
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158 /* Default values for the BMP format */
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159 switch (biBitCount) {
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160 case 15:
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161 case 16:
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162 Rmask = 0x7C00;
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163 Gmask = 0x03E0;
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164 Bmask = 0x001F;
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165 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
166 case 24:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
167 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
168 Rmask = 0x000000FF;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
169 Gmask = 0x0000FF00;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
170 Bmask = 0x00FF0000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
171 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
172 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
173 case 32:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
174 Rmask = 0x00FF0000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
175 Gmask = 0x0000FF00;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
176 Bmask = 0x000000FF;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
177 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
178 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
180 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
181 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
182 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
183 /* Fall through -- read the RGB masks */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
185 case BI_BITFIELDS:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
186 switch (biBitCount) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
187 case 15:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
188 case 16:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
189 case 32:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
190 Rmask = SDL_ReadLE32(src);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
191 Gmask = SDL_ReadLE32(src);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
192 Bmask = SDL_ReadLE32(src);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
193 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
194 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
195 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
196 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
197 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
198 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
199 SDL_SetError("Compressed BMP files not supported");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
200 was_error = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
201 goto done;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 /* Create a compatible surface, note that the colors are RGB ordered */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 biWidth, biHeight, biBitCount, Rmask, Gmask, Bmask, 0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 if ( surface == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 was_error = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 goto done;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212 /* Load the palette, if any */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 palette = (surface->format)->palette;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214 if ( palette ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 if ( biClrUsed == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 biClrUsed = 1 << biBitCount;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 if ( biSize == 12 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219 for ( i = 0; i < (int)biClrUsed; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220 SDL_RWread(src, &palette->colors[i].b, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
221 SDL_RWread(src, &palette->colors[i].g, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222 SDL_RWread(src, &palette->colors[i].r, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
223 palette->colors[i].unused = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
226 for ( i = 0; i < (int)biClrUsed; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227 SDL_RWread(src, &palette->colors[i].b, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
228 SDL_RWread(src, &palette->colors[i].g, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229 SDL_RWread(src, &palette->colors[i].r, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
230 SDL_RWread(src, &palette->colors[i].unused, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
231 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
233 palette->ncolors = biClrUsed;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
234 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
235
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236 /* Read the surface pixels. Note that the bmp image is upside down */
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1329
diff changeset
237 if ( SDL_RWseek(src, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 SDL_Error(SDL_EFSEEK);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 was_error = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240 goto done;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
241 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
242 bits = (Uint8 *)surface->pixels+(surface->h*surface->pitch);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243 switch (ExpandBMP) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
244 case 1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 bmpPitch = (biWidth + 7) >> 3;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246 pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
248 case 4:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
249 bmpPitch = (biWidth + 1) >> 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
250 pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
252 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 pad = ((surface->pitch%4) ?
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 (4-(surface->pitch%4)) : 0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
255 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257 while ( bits > (Uint8 *)surface->pixels ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 bits -= surface->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259 switch (ExpandBMP) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 case 1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261 case 4: {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262 Uint8 pixel = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 int shift = (8-ExpandBMP);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 for ( i=0; i<surface->w; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 if ( i%(8/ExpandBMP) == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266 if ( !SDL_RWread(src, &pixel, 1, 1) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267 SDL_SetError(
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268 "Error reading from BMP");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 was_error = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 goto done;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273 *(bits+i) = (pixel>>shift);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
274 pixel <<= ExpandBMP;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275 } }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
276 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 if ( SDL_RWread(src, bits, 1, surface->pitch)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 != surface->pitch ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 SDL_Error(SDL_EFREAD);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282 was_error = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 goto done;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 /* Byte-swap the pixels if needed. Note that the 24bpp
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 case has already been taken care of above. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 switch(biBitCount) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 case 15:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 case 16: {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 Uint16 *pix = (Uint16 *)bits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 for(i = 0; i < surface->w; i++)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 pix[i] = SDL_Swap16(pix[i]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 case 32: {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298 Uint32 *pix = (Uint32 *)bits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 for(i = 0; i < surface->w; i++)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 pix[i] = SDL_Swap32(pix[i]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 /* Skip padding bytes, ugh */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 if ( pad ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 Uint8 padbyte;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 for ( i=0; i<pad; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 SDL_RWread(src, &padbyte, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 done:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 if ( was_error ) {
1329
bc67bbf87818 Seek back to start on error
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
317 if ( src ) {
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1329
diff changeset
318 SDL_RWseek(src, fp_offset, RW_SEEK_SET);
1329
bc67bbf87818 Seek back to start on error
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
319 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 if ( surface ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 SDL_FreeSurface(surface);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 surface = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 if ( freesrc && src ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 SDL_RWclose(src);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 return(surface);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 int SDL_SaveBMP_RW (SDL_Surface *saveme, SDL_RWops *dst, int freedst)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 long fp_offset;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 int i, pad;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 SDL_Surface *surface;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 Uint8 *bits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337
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parents:
diff changeset
338 /* The Win32 BMP file header (14 bytes) */
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parents:
diff changeset
339 char magic[2] = { 'B', 'M' };
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 Uint32 bfSize;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 Uint16 bfReserved1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 Uint16 bfReserved2;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 Uint32 bfOffBits;
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parents:
diff changeset
344
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parents:
diff changeset
345 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 Uint32 biSize;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 Sint32 biWidth;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 Sint32 biHeight;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 Uint16 biPlanes;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 Uint16 biBitCount;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 Uint32 biCompression;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 Uint32 biSizeImage;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 Sint32 biXPelsPerMeter;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 Sint32 biYPelsPerMeter;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 Uint32 biClrUsed;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 Uint32 biClrImportant;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 /* Make sure we have somewhere to save */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 surface = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 if ( dst ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 if ( saveme->format->palette ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 if ( saveme->format->BitsPerPixel == 8 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 surface = saveme;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 SDL_SetError("%d bpp BMP files not supported",
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 saveme->format->BitsPerPixel);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 else if ( (saveme->format->BitsPerPixel == 24) &&
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 (saveme->format->Rmask == 0x00FF0000) &&
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 (saveme->format->Gmask == 0x0000FF00) &&
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 (saveme->format->Bmask == 0x000000FF)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 #else
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 (saveme->format->Rmask == 0x000000FF) &&
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376 (saveme->format->Gmask == 0x0000FF00) &&
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 (saveme->format->Bmask == 0x00FF0000)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380 surface = saveme;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382 SDL_Rect bounds;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 /* Convert to 24 bits per pixel */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 saveme->w, saveme->h, 24,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 0x00FF0000, 0x0000FF00, 0x000000FF,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 0x000000FF, 0x0000FF00, 0x00FF0000,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 if ( surface != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 bounds.x = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 bounds.y = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396 bounds.w = saveme->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 bounds.h = saveme->h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 if ( SDL_LowerBlit(saveme, &bounds, surface,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 &bounds) < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 SDL_FreeSurface(surface);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 SDL_SetError(
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 "Couldn't convert image to 24 bpp");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 surface = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 if ( surface && (SDL_LockSurface(surface) == 0) ) {
1012
f14e3059e138 Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
410 const int bw = surface->w*surface->format->BytesPerPixel;
f14e3059e138 Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
411
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 /* Set the BMP file header values */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 bfSize = 0; /* We'll write this when we're done */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 bfReserved1 = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 bfReserved2 = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 bfOffBits = 0; /* We'll write this when we're done */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 /* Write the BMP file header values */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 fp_offset = SDL_RWtell(dst);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 SDL_ClearError();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 SDL_RWwrite(dst, magic, 2, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 SDL_WriteLE32(dst, bfSize);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 SDL_WriteLE16(dst, bfReserved1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 SDL_WriteLE16(dst, bfReserved2);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 SDL_WriteLE32(dst, bfOffBits);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 /* Set the BMP info values */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 biSize = 40;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 biWidth = surface->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 biHeight = surface->h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 biPlanes = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 biBitCount = surface->format->BitsPerPixel;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 biCompression = BI_RGB;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434 biSizeImage = surface->h*surface->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 biXPelsPerMeter = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 biYPelsPerMeter = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 if ( surface->format->palette ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 biClrUsed = surface->format->palette->ncolors;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 biClrUsed = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 biClrImportant = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 /* Write the BMP info values */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 SDL_WriteLE32(dst, biSize);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 SDL_WriteLE32(dst, biWidth);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 SDL_WriteLE32(dst, biHeight);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 SDL_WriteLE16(dst, biPlanes);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 SDL_WriteLE16(dst, biBitCount);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 SDL_WriteLE32(dst, biCompression);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 SDL_WriteLE32(dst, biSizeImage);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 SDL_WriteLE32(dst, biXPelsPerMeter);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 SDL_WriteLE32(dst, biYPelsPerMeter);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 SDL_WriteLE32(dst, biClrUsed);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 SDL_WriteLE32(dst, biClrImportant);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 /* Write the palette (in BGR color order) */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 if ( surface->format->palette ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 SDL_Color *colors;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460 int ncolors;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 colors = surface->format->palette->colors;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 ncolors = surface->format->palette->ncolors;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 for ( i=0; i<ncolors; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 SDL_RWwrite(dst, &colors[i].b, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 SDL_RWwrite(dst, &colors[i].g, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 SDL_RWwrite(dst, &colors[i].r, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 SDL_RWwrite(dst, &colors[i].unused, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 /* Write the bitmap offset */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 bfOffBits = SDL_RWtell(dst)-fp_offset;
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1329
diff changeset
474 if ( SDL_RWseek(dst, fp_offset+10, RW_SEEK_SET) < 0 ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 SDL_Error(SDL_EFSEEK);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 SDL_WriteLE32(dst, bfOffBits);
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1329
diff changeset
478 if ( SDL_RWseek(dst, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 SDL_Error(SDL_EFSEEK);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 /* Write the bitmap image upside down */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 bits = (Uint8 *)surface->pixels+(surface->h*surface->pitch);
1012
f14e3059e138 Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
484 pad = ((bw%4) ? (4-(bw%4)) : 0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 while ( bits > (Uint8 *)surface->pixels ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 bits -= surface->pitch;
1012
f14e3059e138 Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
487 if ( SDL_RWwrite(dst, bits, 1, bw) != bw) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 SDL_Error(SDL_EFWRITE);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 if ( pad ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 const Uint8 padbyte = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
493 for ( i=0; i<pad; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 SDL_RWwrite(dst, &padbyte, 1, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
499 /* Write the BMP file size */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 bfSize = SDL_RWtell(dst)-fp_offset;
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1329
diff changeset
501 if ( SDL_RWseek(dst, fp_offset+2, RW_SEEK_SET) < 0 ) {
0
74212992fb08 Initial revision
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502 SDL_Error(SDL_EFSEEK);
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503 }
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504 SDL_WriteLE32(dst, bfSize);
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450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
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505 if ( SDL_RWseek(dst, fp_offset+bfSize, RW_SEEK_SET) < 0 ) {
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506 SDL_Error(SDL_EFSEEK);
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507 }
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508
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509 /* Close it up.. */
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510 SDL_UnlockSurface(surface);
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511 if ( surface != saveme ) {
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512 SDL_FreeSurface(surface);
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513 }
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514 }
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515
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516 if ( freedst && dst ) {
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517 SDL_RWclose(dst);
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518 }
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3692456e7b0f Use SDL_ prefixed versions of C library functions.
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519 return((SDL_strcmp(SDL_GetError(), "") == 0) ? 0 : -1);
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520 }