Mercurial > sdl-ios-xcode
annotate src/video/SDL_bmp.c @ 3477:2c07bb579922
We want to be strict on software renderer tests and opaque tests, but give a decent margin for blending inaccuracy for the blended tests.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 21 Nov 2009 07:59:19 +0000 |
parents | b907e83deb88 |
children | 74d2f44a85de |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
2859 | 3 Copyright (C) 1997-2009 Sam Lantinga |
0 | 4 |
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 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
24 /* | |
25 Code to load and save surfaces in Windows BMP format. | |
26 | |
27 Why support BMP format? Well, it's a native format for Windows, and | |
28 most image processing programs can read and write it. It would be nice | |
29 to be able to have at least one image format that we can natively load | |
30 and save, and since PNG is so complex that it would bloat the library, | |
31 BMP is a good alternative. | |
32 | |
33 This code currently supports Win32 DIBs in uncompressed 8 and 24 bpp. | |
34 */ | |
35 | |
36 #include "SDL_video.h" | |
37 #include "SDL_endian.h" | |
2823 | 38 #include "SDL_pixels_c.h" |
0 | 39 |
40 /* Compression encodings for BMP files */ | |
41 #ifndef BI_RGB | |
42 #define BI_RGB 0 | |
43 #define BI_RLE8 1 | |
44 #define BI_RLE4 2 | |
45 #define BI_BITFIELDS 3 | |
46 #endif | |
47 | |
48 | |
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49 SDL_Surface * |
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50 SDL_LoadBMP_RW(SDL_RWops * src, int freesrc) |
0 | 51 { |
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52 SDL_bool was_error; |
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53 long fp_offset; |
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54 int bmpPitch; |
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55 int i, pad; |
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56 SDL_Surface *surface; |
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57 Uint32 Rmask; |
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58 Uint32 Gmask; |
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59 Uint32 Bmask; |
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60 SDL_Palette *palette; |
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61 Uint8 *bits; |
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62 Uint8 *top, *end; |
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63 SDL_bool topDown; |
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64 int ExpandBMP; |
0 | 65 |
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66 /* The Win32 BMP file header (14 bytes) */ |
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67 char magic[2]; |
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68 Uint32 bfSize; |
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69 Uint16 bfReserved1; |
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70 Uint16 bfReserved2; |
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71 Uint32 bfOffBits; |
0 | 72 |
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73 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ |
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74 Uint32 biSize; |
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75 Sint32 biWidth; |
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76 Sint32 biHeight; |
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77 Uint16 biPlanes; |
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78 Uint16 biBitCount; |
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79 Uint32 biCompression; |
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80 Uint32 biSizeImage; |
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81 Sint32 biXPelsPerMeter; |
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82 Sint32 biYPelsPerMeter; |
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83 Uint32 biClrUsed; |
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84 Uint32 biClrImportant; |
0 | 85 |
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86 /* Make sure we are passed a valid data source */ |
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87 surface = NULL; |
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88 was_error = SDL_FALSE; |
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89 if (src == NULL) { |
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90 was_error = SDL_TRUE; |
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91 goto done; |
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92 } |
0 | 93 |
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94 /* Read in the BMP file header */ |
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95 fp_offset = SDL_RWtell(src); |
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96 SDL_ClearError(); |
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97 if (SDL_RWread(src, magic, 1, 2) != 2) { |
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98 SDL_Error(SDL_EFREAD); |
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99 was_error = SDL_TRUE; |
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100 goto done; |
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101 } |
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102 if (SDL_strncmp(magic, "BM", 2) != 0) { |
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103 SDL_SetError("File is not a Windows BMP file"); |
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104 was_error = SDL_TRUE; |
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105 goto done; |
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106 } |
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107 bfSize = SDL_ReadLE32(src); |
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108 bfReserved1 = SDL_ReadLE16(src); |
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109 bfReserved2 = SDL_ReadLE16(src); |
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110 bfOffBits = SDL_ReadLE32(src); |
0 | 111 |
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112 /* Read the Win32 BITMAPINFOHEADER */ |
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113 biSize = SDL_ReadLE32(src); |
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114 if (biSize == 12) { |
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115 biWidth = (Uint32) SDL_ReadLE16(src); |
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116 biHeight = (Uint32) SDL_ReadLE16(src); |
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117 biPlanes = SDL_ReadLE16(src); |
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118 biBitCount = SDL_ReadLE16(src); |
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119 biCompression = BI_RGB; |
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120 biSizeImage = 0; |
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121 biXPelsPerMeter = 0; |
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122 biYPelsPerMeter = 0; |
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123 biClrUsed = 0; |
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124 biClrImportant = 0; |
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125 } else { |
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126 biWidth = SDL_ReadLE32(src); |
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127 biHeight = SDL_ReadLE32(src); |
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128 biPlanes = SDL_ReadLE16(src); |
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129 biBitCount = SDL_ReadLE16(src); |
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130 biCompression = SDL_ReadLE32(src); |
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131 biSizeImage = SDL_ReadLE32(src); |
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132 biXPelsPerMeter = SDL_ReadLE32(src); |
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133 biYPelsPerMeter = SDL_ReadLE32(src); |
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134 biClrUsed = SDL_ReadLE32(src); |
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135 biClrImportant = SDL_ReadLE32(src); |
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136 } |
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137 if (biHeight < 0) { |
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138 topDown = SDL_TRUE; |
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139 biHeight = -biHeight; |
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140 } else { |
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141 topDown = SDL_FALSE; |
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142 } |
0 | 143 |
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144 /* Check for read error */ |
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145 if (SDL_strcmp(SDL_GetError(), "") != 0) { |
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146 was_error = SDL_TRUE; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
147 goto done; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
148 } |
0 | 149 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
150 /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
151 switch (biBitCount) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
152 case 1: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
153 case 4: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
154 ExpandBMP = biBitCount; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
155 biBitCount = 8; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
156 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
157 default: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
158 ExpandBMP = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
159 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
160 } |
0 | 161 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
162 /* We don't support any BMP compression right now */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
163 Rmask = Gmask = Bmask = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
164 switch (biCompression) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
165 case BI_RGB: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
166 /* If there are no masks, use the defaults */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
167 if (bfOffBits == (14 + biSize)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
168 /* Default values for the BMP format */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
169 switch (biBitCount) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
170 case 15: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
171 case 16: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
172 Rmask = 0x7C00; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
173 Gmask = 0x03E0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
174 Bmask = 0x001F; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
175 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
176 case 24: |
0 | 177 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
178 Rmask = 0x000000FF; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
179 Gmask = 0x0000FF00; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
180 Bmask = 0x00FF0000; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
181 break; |
0 | 182 #endif |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
183 case 32: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
184 Rmask = 0x00FF0000; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
185 Gmask = 0x0000FF00; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
186 Bmask = 0x000000FF; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
187 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
188 default: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
189 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
190 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
191 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
192 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
193 /* Fall through -- read the RGB masks */ |
0 | 194 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
195 case BI_BITFIELDS: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
196 switch (biBitCount) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
197 case 15: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
198 case 16: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
199 case 32: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
200 Rmask = SDL_ReadLE32(src); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
201 Gmask = SDL_ReadLE32(src); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
202 Bmask = SDL_ReadLE32(src); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
203 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
204 default: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
205 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
206 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
207 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
208 default: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
209 SDL_SetError("Compressed BMP files not supported"); |
3310
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
210 was_error = SDL_TRUE; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
211 goto done; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
212 } |
0 | 213 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
214 /* Create a compatible surface, note that the colors are RGB ordered */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
215 surface = |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
216 SDL_CreateRGBSurface(0, biWidth, biHeight, biBitCount, Rmask, Gmask, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
217 Bmask, 0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
218 if (surface == NULL) { |
3310
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
219 was_error = SDL_TRUE; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
220 goto done; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
221 } |
0 | 222 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
223 /* Load the palette, if any */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
224 palette = (surface->format)->palette; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
225 if (palette) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
226 if (biClrUsed == 0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
227 biClrUsed = 1 << biBitCount; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
228 } |
2920 | 229 if ((int) biClrUsed > palette->ncolors) { |
2851
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
230 palette->ncolors = biClrUsed; |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
231 palette->colors = |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
232 (SDL_Color *) SDL_realloc(palette->colors, |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
233 palette->ncolors * |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
234 sizeof(*palette->colors)); |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
235 if (!palette->colors) { |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
236 SDL_OutOfMemory(); |
3310
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
237 was_error = SDL_TRUE; |
2851
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
238 goto done; |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
239 } |
2920 | 240 } else if ((int) biClrUsed < palette->ncolors) { |
2851
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
241 palette->ncolors = biClrUsed; |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
242 } |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
243 if (biSize == 12) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
244 for (i = 0; i < (int) biClrUsed; ++i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
245 SDL_RWread(src, &palette->colors[i].b, 1, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
246 SDL_RWread(src, &palette->colors[i].g, 1, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
247 SDL_RWread(src, &palette->colors[i].r, 1, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
248 palette->colors[i].unused = SDL_ALPHA_OPAQUE; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
249 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
250 } else { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
251 for (i = 0; i < (int) biClrUsed; ++i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
252 SDL_RWread(src, &palette->colors[i].b, 1, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
253 SDL_RWread(src, &palette->colors[i].g, 1, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
254 SDL_RWread(src, &palette->colors[i].r, 1, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
255 SDL_RWread(src, &palette->colors[i].unused, 1, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
256 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
257 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
258 } |
0 | 259 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
260 /* Read the surface pixels. Note that the bmp image is upside down */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
261 if (SDL_RWseek(src, fp_offset + bfOffBits, RW_SEEK_SET) < 0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
262 SDL_Error(SDL_EFSEEK); |
3310
b907e83deb88
Fixed crash with right side up BMP files
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changeset
|
263 was_error = SDL_TRUE; |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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diff
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|
264 goto done; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
265 } |
3310
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Fixed crash with right side up BMP files
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|
266 top = (Uint8 *)surface->pixels; |
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Fixed crash with right side up BMP files
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|
267 end = (Uint8 *)surface->pixels+(surface->h*surface->pitch); |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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changeset
|
268 switch (ExpandBMP) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
269 case 1: |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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changeset
|
270 bmpPitch = (biWidth + 7) >> 3; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
271 pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
272 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
273 case 4: |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
274 bmpPitch = (biWidth + 1) >> 1; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
275 pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
276 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
277 default: |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
278 pad = ((surface->pitch % 4) ? (4 - (surface->pitch % 4)) : 0); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
279 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
280 } |
3310
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Fixed crash with right side up BMP files
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changeset
|
281 if (topDown) { |
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Fixed crash with right side up BMP files
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changeset
|
282 bits = top; |
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Fixed crash with right side up BMP files
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|
283 } else { |
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Fixed crash with right side up BMP files
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|
284 bits = end - surface->pitch; |
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Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
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changeset
|
285 } |
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Fixed crash with right side up BMP files
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changeset
|
286 while (bits >= top && bits < end) { |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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287 switch (ExpandBMP) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
288 case 1: |
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Fixed crash with right side up BMP files
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|
289 case 4:{ |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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290 Uint8 pixel = 0; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
291 int shift = (8 - ExpandBMP); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
292 for (i = 0; i < surface->w; ++i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
293 if (i % (8 / ExpandBMP) == 0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
294 if (!SDL_RWread(src, &pixel, 1, 1)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
295 SDL_SetError("Error reading from BMP"); |
3310
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Fixed crash with right side up BMP files
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|
296 was_error = SDL_TRUE; |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
297 goto done; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
298 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
299 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
300 *(bits + i) = (pixel >> shift); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
301 pixel <<= ExpandBMP; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
302 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
303 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
304 break; |
0 | 305 |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
306 default: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
307 if (SDL_RWread(src, bits, 1, surface->pitch) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
308 != surface->pitch) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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1402
diff
changeset
|
309 SDL_Error(SDL_EFREAD); |
3310
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Fixed crash with right side up BMP files
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changeset
|
310 was_error = SDL_TRUE; |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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diff
changeset
|
311 goto done; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
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changeset
|
312 } |
0 | 313 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
1402
diff
changeset
|
314 /* Byte-swap the pixels if needed. Note that the 24bpp |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
315 case has already been taken care of above. */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
316 switch (biBitCount) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
317 case 15: |
3310
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Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
318 case 16:{ |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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diff
changeset
|
319 Uint16 *pix = (Uint16 *) bits; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
320 for (i = 0; i < surface->w; i++) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
321 pix[i] = SDL_Swap16(pix[i]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
322 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
323 } |
0 | 324 |
3310
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
325 case 32:{ |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
326 Uint32 *pix = (Uint32 *) bits; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
327 for (i = 0; i < surface->w; i++) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
328 pix[i] = SDL_Swap32(pix[i]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
329 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
330 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
331 } |
0 | 332 #endif |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
333 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
334 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
335 /* Skip padding bytes, ugh */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
336 if (pad) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
337 Uint8 padbyte; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
338 for (i = 0; i < pad; ++i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
339 SDL_RWread(src, &padbyte, 1, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
340 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
341 } |
3310
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
342 if (topDown) { |
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
343 bits += surface->pitch; |
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
344 } else { |
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
345 bits -= surface->pitch; |
b907e83deb88
Fixed crash with right side up BMP files
Sam Lantinga <slouken@libsdl.org>
parents:
3026
diff
changeset
|
346 } |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
347 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
348 done: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
349 if (was_error) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
350 if (src) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
351 SDL_RWseek(src, fp_offset, RW_SEEK_SET); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
352 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
353 if (surface) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
354 SDL_FreeSurface(surface); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
355 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
356 surface = NULL; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
357 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
358 if (freesrc && src) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
359 SDL_RWclose(src); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
360 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
361 return (surface); |
0 | 362 } |
363 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
364 int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
365 SDL_SaveBMP_RW(SDL_Surface * saveme, SDL_RWops * dst, int freedst) |
0 | 366 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
367 long fp_offset; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
368 int i, pad; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
369 SDL_Surface *surface; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
370 Uint8 *bits; |
0 | 371 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
372 /* The Win32 BMP file header (14 bytes) */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
373 char magic[2] = { 'B', 'M' }; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
374 Uint32 bfSize; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
375 Uint16 bfReserved1; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
376 Uint16 bfReserved2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
377 Uint32 bfOffBits; |
0 | 378 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
379 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
380 Uint32 biSize; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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381 Sint32 biWidth; |
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382 Sint32 biHeight; |
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383 Uint16 biPlanes; |
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384 Uint16 biBitCount; |
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385 Uint32 biCompression; |
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386 Uint32 biSizeImage; |
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387 Sint32 biXPelsPerMeter; |
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388 Sint32 biYPelsPerMeter; |
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389 Uint32 biClrUsed; |
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390 Uint32 biClrImportant; |
0 | 391 |
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392 /* Make sure we have somewhere to save */ |
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393 surface = NULL; |
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394 if (dst) { |
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395 SDL_bool save32bit = SDL_FALSE; |
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396 #ifdef SAVE_32BIT_BMP |
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397 /* We can save alpha information in a 32-bit BMP */ |
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398 if (saveme->map->info.flags & SDL_COPY_COLORKEY || |
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399 saveme->format->Amask) { |
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400 save32bit = SDL_TRUE; |
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401 } |
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402 #endif /* SAVE_32BIT_BMP */ |
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403 |
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404 if (saveme->format->palette && !save32bit) { |
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405 if (saveme->format->BitsPerPixel == 8) { |
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406 surface = saveme; |
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407 } else { |
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408 SDL_SetError("%d bpp BMP files not supported", |
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409 saveme->format->BitsPerPixel); |
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410 } |
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411 } else if ((saveme->format->BitsPerPixel == 24) && |
0 | 412 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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413 (saveme->format->Rmask == 0x00FF0000) && |
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414 (saveme->format->Gmask == 0x0000FF00) && |
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415 (saveme->format->Bmask == 0x000000FF) |
0 | 416 #else |
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417 (saveme->format->Rmask == 0x000000FF) && |
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418 (saveme->format->Gmask == 0x0000FF00) && |
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419 (saveme->format->Bmask == 0x00FF0000) |
0 | 420 #endif |
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421 ) { |
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422 surface = saveme; |
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423 } else { |
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424 SDL_PixelFormat format; |
0 | 425 |
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426 /* If the surface has a colorkey or alpha channel we'll save a |
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427 32-bit BMP with alpha channel, otherwise save a 24-bit BMP. */ |
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428 if (save32bit) { |
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429 SDL_InitFormat(&format, 32, |
2990 | 430 0x00FF0000, 0x0000FF00, 0x000000FF, |
431 0xFF000000); | |
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432 } else { |
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433 SDL_InitFormat(&format, 24, |
0 | 434 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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435 0x00FF0000, 0x0000FF00, 0x000000FF, |
0 | 436 #else |
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437 0x000000FF, 0x0000FF00, 0x00FF0000, |
0 | 438 #endif |
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439 0); |
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440 } |
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441 surface = SDL_ConvertSurface(saveme, &format, 0); |
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442 if (!surface) { |
2990 | 443 SDL_SetError("Couldn't convert image to %d bpp", |
444 format.BitsPerPixel); | |
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445 } |
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446 } |
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447 } |
0 | 448 |
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449 if (surface && (SDL_LockSurface(surface) == 0)) { |
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450 const int bw = surface->w * surface->format->BytesPerPixel; |
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451 |
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452 /* Set the BMP file header values */ |
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453 bfSize = 0; /* We'll write this when we're done */ |
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454 bfReserved1 = 0; |
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455 bfReserved2 = 0; |
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456 bfOffBits = 0; /* We'll write this when we're done */ |
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Date: Mon, 13 Dec 2004 21:28:18 -0500
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457 |
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458 /* Write the BMP file header values */ |
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459 fp_offset = SDL_RWtell(dst); |
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460 SDL_ClearError(); |
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461 SDL_RWwrite(dst, magic, 2, 1); |
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462 SDL_WriteLE32(dst, bfSize); |
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463 SDL_WriteLE16(dst, bfReserved1); |
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464 SDL_WriteLE16(dst, bfReserved2); |
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465 SDL_WriteLE32(dst, bfOffBits); |
0 | 466 |
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467 /* Set the BMP info values */ |
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468 biSize = 40; |
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469 biWidth = surface->w; |
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470 biHeight = surface->h; |
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471 biPlanes = 1; |
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472 biBitCount = surface->format->BitsPerPixel; |
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473 biCompression = BI_RGB; |
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474 biSizeImage = surface->h * surface->pitch; |
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475 biXPelsPerMeter = 0; |
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476 biYPelsPerMeter = 0; |
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477 if (surface->format->palette) { |
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478 biClrUsed = surface->format->palette->ncolors; |
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479 } else { |
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480 biClrUsed = 0; |
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481 } |
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482 biClrImportant = 0; |
0 | 483 |
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484 /* Write the BMP info values */ |
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485 SDL_WriteLE32(dst, biSize); |
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486 SDL_WriteLE32(dst, biWidth); |
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487 SDL_WriteLE32(dst, biHeight); |
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488 SDL_WriteLE16(dst, biPlanes); |
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489 SDL_WriteLE16(dst, biBitCount); |
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490 SDL_WriteLE32(dst, biCompression); |
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491 SDL_WriteLE32(dst, biSizeImage); |
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492 SDL_WriteLE32(dst, biXPelsPerMeter); |
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493 SDL_WriteLE32(dst, biYPelsPerMeter); |
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494 SDL_WriteLE32(dst, biClrUsed); |
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495 SDL_WriteLE32(dst, biClrImportant); |
0 | 496 |
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497 /* Write the palette (in BGR color order) */ |
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498 if (surface->format->palette) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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499 SDL_Color *colors; |
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500 int ncolors; |
0 | 501 |
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502 colors = surface->format->palette->colors; |
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503 ncolors = surface->format->palette->ncolors; |
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504 for (i = 0; i < ncolors; ++i) { |
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505 SDL_RWwrite(dst, &colors[i].b, 1, 1); |
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506 SDL_RWwrite(dst, &colors[i].g, 1, 1); |
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507 SDL_RWwrite(dst, &colors[i].r, 1, 1); |
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508 SDL_RWwrite(dst, &colors[i].unused, 1, 1); |
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509 } |
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510 } |
0 | 511 |
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512 /* Write the bitmap offset */ |
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513 bfOffBits = SDL_RWtell(dst) - fp_offset; |
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514 if (SDL_RWseek(dst, fp_offset + 10, RW_SEEK_SET) < 0) { |
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515 SDL_Error(SDL_EFSEEK); |
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516 } |
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517 SDL_WriteLE32(dst, bfOffBits); |
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518 if (SDL_RWseek(dst, fp_offset + bfOffBits, RW_SEEK_SET) < 0) { |
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519 SDL_Error(SDL_EFSEEK); |
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520 } |
0 | 521 |
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522 /* Write the bitmap image upside down */ |
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523 bits = (Uint8 *) surface->pixels + (surface->h * surface->pitch); |
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524 pad = ((bw % 4) ? (4 - (bw % 4)) : 0); |
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525 while (bits > (Uint8 *) surface->pixels) { |
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526 bits -= surface->pitch; |
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527 if (SDL_RWwrite(dst, bits, 1, bw) != bw) { |
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528 SDL_Error(SDL_EFWRITE); |
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529 break; |
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530 } |
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531 if (pad) { |
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532 const Uint8 padbyte = 0; |
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533 for (i = 0; i < pad; ++i) { |
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534 SDL_RWwrite(dst, &padbyte, 1, 1); |
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535 } |
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536 } |
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537 } |
0 | 538 |
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539 /* Write the BMP file size */ |
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540 bfSize = SDL_RWtell(dst) - fp_offset; |
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541 if (SDL_RWseek(dst, fp_offset + 2, RW_SEEK_SET) < 0) { |
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542 SDL_Error(SDL_EFSEEK); |
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543 } |
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544 SDL_WriteLE32(dst, bfSize); |
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545 if (SDL_RWseek(dst, fp_offset + bfSize, RW_SEEK_SET) < 0) { |
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546 SDL_Error(SDL_EFSEEK); |
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547 } |
0 | 548 |
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549 /* Close it up.. */ |
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550 SDL_UnlockSurface(surface); |
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551 if (surface != saveme) { |
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552 SDL_FreeSurface(surface); |
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553 } |
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554 } |
0 | 555 |
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556 if (freedst && dst) { |
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557 SDL_RWclose(dst); |
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558 } |
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559 return ((SDL_strcmp(SDL_GetError(), "") == 0) ? 0 : -1); |
0 | 560 } |
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561 |
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562 /* vi: set ts=4 sw=4 expandtab: */ |