Mercurial > sdl-ios-xcode
annotate src/video/SDL_bmp.c @ 3116:b17f1ae7ad66
Added support for single buffering, if double buffering is not available.
author | Mike Gorchak <lestat@i.com.ua> |
---|---|
date | Tue, 05 May 2009 17:50:34 +0000 |
parents | 69ab1117dd3b |
children | b907e83deb88 |
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 | |
252
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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 int 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 int ExpandBMP; |
0 | 63 |
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64 /* The Win32 BMP file header (14 bytes) */ |
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65 char magic[2]; |
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66 Uint32 bfSize; |
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67 Uint16 bfReserved1; |
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68 Uint16 bfReserved2; |
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69 Uint32 bfOffBits; |
0 | 70 |
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71 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ |
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72 Uint32 biSize; |
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73 Sint32 biWidth; |
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74 Sint32 biHeight; |
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75 Uint16 biPlanes; |
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76 Uint16 biBitCount; |
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77 Uint32 biCompression; |
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78 Uint32 biSizeImage; |
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79 Sint32 biXPelsPerMeter; |
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80 Sint32 biYPelsPerMeter; |
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81 Uint32 biClrUsed; |
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82 Uint32 biClrImportant; |
0 | 83 |
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84 /* Make sure we are passed a valid data source */ |
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85 surface = NULL; |
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86 was_error = 0; |
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87 if (src == NULL) { |
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88 was_error = 1; |
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89 goto done; |
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90 } |
0 | 91 |
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92 /* Read in the BMP file header */ |
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93 fp_offset = SDL_RWtell(src); |
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94 SDL_ClearError(); |
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95 if (SDL_RWread(src, magic, 1, 2) != 2) { |
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96 SDL_Error(SDL_EFREAD); |
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97 was_error = 1; |
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98 goto done; |
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99 } |
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100 if (SDL_strncmp(magic, "BM", 2) != 0) { |
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101 SDL_SetError("File is not a Windows BMP file"); |
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102 was_error = 1; |
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103 goto done; |
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104 } |
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105 bfSize = SDL_ReadLE32(src); |
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106 bfReserved1 = SDL_ReadLE16(src); |
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107 bfReserved2 = SDL_ReadLE16(src); |
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108 bfOffBits = SDL_ReadLE32(src); |
0 | 109 |
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110 /* Read the Win32 BITMAPINFOHEADER */ |
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111 biSize = SDL_ReadLE32(src); |
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112 if (biSize == 12) { |
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113 biWidth = (Uint32) SDL_ReadLE16(src); |
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114 biHeight = (Uint32) SDL_ReadLE16(src); |
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115 biPlanes = SDL_ReadLE16(src); |
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116 biBitCount = SDL_ReadLE16(src); |
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117 biCompression = BI_RGB; |
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118 biSizeImage = 0; |
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119 biXPelsPerMeter = 0; |
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120 biYPelsPerMeter = 0; |
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121 biClrUsed = 0; |
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122 biClrImportant = 0; |
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123 } else { |
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124 biWidth = SDL_ReadLE32(src); |
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125 biHeight = SDL_ReadLE32(src); |
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126 biPlanes = SDL_ReadLE16(src); |
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127 biBitCount = SDL_ReadLE16(src); |
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128 biCompression = SDL_ReadLE32(src); |
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129 biSizeImage = SDL_ReadLE32(src); |
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130 biXPelsPerMeter = SDL_ReadLE32(src); |
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131 biYPelsPerMeter = SDL_ReadLE32(src); |
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132 biClrUsed = SDL_ReadLE32(src); |
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133 biClrImportant = SDL_ReadLE32(src); |
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134 } |
0 | 135 |
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136 /* Check for read error */ |
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137 if (SDL_strcmp(SDL_GetError(), "") != 0) { |
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138 was_error = 1; |
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139 goto done; |
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140 } |
0 | 141 |
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142 /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */ |
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143 switch (biBitCount) { |
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144 case 1: |
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145 case 4: |
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diff
changeset
|
146 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
|
147 biBitCount = 8; |
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
|
148 break; |
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
|
149 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
|
150 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
|
151 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
|
152 } |
0 | 153 |
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
|
154 /* 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
|
155 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
|
156 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
|
157 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:
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diff
changeset
|
158 /* 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
|
159 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
|
160 /* 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
|
161 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:
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diff
changeset
|
162 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:
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diff
changeset
|
163 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:
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diff
changeset
|
164 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:
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diff
changeset
|
165 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:
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diff
changeset
|
166 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:
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diff
changeset
|
167 break; |
c121d94672cb
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
|
168 case 24: |
0 | 169 #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
|
170 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
|
171 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:
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diff
changeset
|
172 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
|
173 break; |
0 | 174 #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
|
175 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:
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diff
changeset
|
176 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:
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diff
changeset
|
177 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:
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diff
changeset
|
178 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:
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changeset
|
179 break; |
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
|
180 default: |
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
|
181 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
|
182 } |
c121d94672cb
SDL 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 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
|
184 } |
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
|
185 /* Fall through -- read the RGB masks */ |
0 | 186 |
1895
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
|
187 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
|
188 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
|
189 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
|
190 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
|
191 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
|
192 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
|
193 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
|
194 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
|
195 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
|
196 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
|
197 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
|
198 } |
c121d94672cb
SDL 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 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
|
200 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
|
201 SDL_SetError("Compressed BMP files not supported"); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
202 was_error = 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
|
203 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
|
204 } |
0 | 205 |
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
|
206 /* 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
|
207 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
|
208 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
|
209 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
|
210 if (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
|
211 was_error = 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
|
212 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
|
213 } |
0 | 214 |
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
|
215 /* 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
|
216 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
|
217 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
|
218 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
|
219 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
|
220 } |
2920 | 221 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
|
222 palette->ncolors = biClrUsed; |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
223 palette->colors = |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
224 (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
|
225 palette->ncolors * |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
226 sizeof(*palette->colors)); |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
227 if (!palette->colors) { |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
228 SDL_OutOfMemory(); |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
229 was_error = 1; |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
230 goto done; |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
231 } |
2920 | 232 } 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
|
233 palette->ncolors = biClrUsed; |
6c3fbeb04eca
Fixed crash in testpalette and potential crash in SDL_LoadBMP_RW()
Sam Lantinga <slouken@libsdl.org>
parents:
2823
diff
changeset
|
234 } |
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
|
235 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
|
236 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
|
237 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
|
238 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
|
239 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
|
240 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
|
241 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
242 } 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
|
243 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
|
244 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
|
245 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
|
246 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
|
247 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
|
248 } |
c121d94672cb
SDL 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 } |
0 | 251 |
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
|
252 /* 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
|
253 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
|
254 SDL_Error(SDL_EFSEEK); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
255 was_error = 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 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
|
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 bits = (Uint8 *) surface->pixels + (surface->h * surface->pitch); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
259 switch (ExpandBMP) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
260 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
|
261 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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262 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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|
263 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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|
264 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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|
265 bmpPitch = (biWidth + 1) >> 1; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
266 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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|
267 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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|
268 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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|
269 pad = ((surface->pitch % 4) ? (4 - (surface->pitch % 4)) : 0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
270 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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|
271 } |
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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 while (bits > (Uint8 *) surface->pixels) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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273 bits -= surface->pitch; |
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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 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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|
275 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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276 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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|
277 { |
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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 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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279 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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280 for (i = 0; i < surface->w; ++i) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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281 if (i % (8 / ExpandBMP) == 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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282 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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|
283 SDL_SetError("Error reading from BMP"); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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284 was_error = 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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285 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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|
286 } |
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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 } |
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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 *(bits + i) = (pixel >> shift); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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289 pixel <<= 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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|
290 } |
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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 } |
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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>
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|
292 break; |
0 | 293 |
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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294 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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295 if (SDL_RWread(src, bits, 1, surface->pitch) |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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296 != surface->pitch) { |
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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 SDL_Error(SDL_EFREAD); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
298 was_error = 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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|
299 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>
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|
300 } |
0 | 301 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
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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|
302 /* 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.
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parents:
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|
303 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.
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|
304 switch (biBitCount) { |
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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|
305 case 15: |
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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>
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|
306 case 16: |
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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>
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|
307 { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
308 Uint16 *pix = (Uint16 *) bits; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
309 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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|
310 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:
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|
311 break; |
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
|
312 } |
0 | 313 |
1895
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
|
314 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:
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changeset
|
315 { |
c121d94672cb
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
|
316 Uint32 *pix = (Uint32 *) bits; |
c121d94672cb
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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|
317 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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changeset
|
318 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:
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|
319 break; |
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
|
320 } |
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
|
321 } |
0 | 322 #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:
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diff
changeset
|
323 break; |
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
|
324 } |
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
|
325 /* 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:
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diff
changeset
|
326 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:
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diff
changeset
|
327 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:
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diff
changeset
|
328 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:
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diff
changeset
|
329 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:
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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 } |
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
|
332 } |
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
|
333 done: |
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
|
334 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:
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diff
changeset
|
335 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:
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diff
changeset
|
336 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:
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diff
changeset
|
337 } |
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
|
338 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:
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diff
changeset
|
339 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:
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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:
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diff
changeset
|
341 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:
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diff
changeset
|
342 } |
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
|
343 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:
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diff
changeset
|
344 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:
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diff
changeset
|
345 } |
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
|
346 return (surface); |
0 | 347 } |
348 | |
1895
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
|
349 int |
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
|
350 SDL_SaveBMP_RW(SDL_Surface * saveme, SDL_RWops * dst, int freedst) |
0 | 351 { |
1895
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
|
352 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:
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diff
changeset
|
353 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:
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diff
changeset
|
354 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:
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diff
changeset
|
355 Uint8 *bits; |
0 | 356 |
1895
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
|
357 /* 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:
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diff
changeset
|
358 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:
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diff
changeset
|
359 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:
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diff
changeset
|
360 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:
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diff
changeset
|
361 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:
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diff
changeset
|
362 Uint32 bfOffBits; |
0 | 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 /* 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:
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diff
changeset
|
365 Uint32 biSize; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
366 Sint32 biWidth; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
367 Sint32 biHeight; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
368 Uint16 biPlanes; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
369 Uint16 biBitCount; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
370 Uint32 biCompression; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
371 Uint32 biSizeImage; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
372 Sint32 biXPelsPerMeter; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
373 Sint32 biYPelsPerMeter; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
374 Uint32 biClrUsed; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
375 Uint32 biClrImportant; |
0 | 376 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
377 /* Make sure we have somewhere to save */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
378 surface = NULL; |
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379 if (dst) { |
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380 SDL_bool save32bit = SDL_FALSE; |
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381 #ifdef SAVE_32BIT_BMP |
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382 /* We can save alpha information in a 32-bit BMP */ |
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383 if (saveme->map->info.flags & SDL_COPY_COLORKEY || |
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384 saveme->format->Amask) { |
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385 save32bit = SDL_TRUE; |
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386 } |
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387 #endif /* SAVE_32BIT_BMP */ |
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388 |
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389 if (saveme->format->palette && !save32bit) { |
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390 if (saveme->format->BitsPerPixel == 8) { |
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391 surface = saveme; |
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392 } else { |
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393 SDL_SetError("%d bpp BMP files not supported", |
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394 saveme->format->BitsPerPixel); |
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395 } |
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396 } else if ((saveme->format->BitsPerPixel == 24) && |
0 | 397 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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398 (saveme->format->Rmask == 0x00FF0000) && |
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399 (saveme->format->Gmask == 0x0000FF00) && |
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400 (saveme->format->Bmask == 0x000000FF) |
0 | 401 #else |
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402 (saveme->format->Rmask == 0x000000FF) && |
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403 (saveme->format->Gmask == 0x0000FF00) && |
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404 (saveme->format->Bmask == 0x00FF0000) |
0 | 405 #endif |
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406 ) { |
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407 surface = saveme; |
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408 } else { |
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409 SDL_PixelFormat format; |
0 | 410 |
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411 /* If the surface has a colorkey or alpha channel we'll save a |
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412 32-bit BMP with alpha channel, otherwise save a 24-bit BMP. */ |
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413 if (save32bit) { |
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414 SDL_InitFormat(&format, 32, |
2990 | 415 0x00FF0000, 0x0000FF00, 0x000000FF, |
416 0xFF000000); | |
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417 } else { |
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418 SDL_InitFormat(&format, 24, |
0 | 419 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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420 0x00FF0000, 0x0000FF00, 0x000000FF, |
0 | 421 #else |
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422 0x000000FF, 0x0000FF00, 0x00FF0000, |
0 | 423 #endif |
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424 0); |
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425 } |
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426 surface = SDL_ConvertSurface(saveme, &format, 0); |
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427 if (!surface) { |
2990 | 428 SDL_SetError("Couldn't convert image to %d bpp", |
429 format.BitsPerPixel); | |
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430 } |
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431 } |
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432 } |
0 | 433 |
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434 if (surface && (SDL_LockSurface(surface) == 0)) { |
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435 const int bw = surface->w * surface->format->BytesPerPixel; |
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436 |
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437 /* Set the BMP file header values */ |
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438 bfSize = 0; /* We'll write this when we're done */ |
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439 bfReserved1 = 0; |
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440 bfReserved2 = 0; |
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441 bfOffBits = 0; /* We'll write this when we're done */ |
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442 |
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443 /* Write the BMP file header values */ |
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444 fp_offset = SDL_RWtell(dst); |
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445 SDL_ClearError(); |
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446 SDL_RWwrite(dst, magic, 2, 1); |
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447 SDL_WriteLE32(dst, bfSize); |
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448 SDL_WriteLE16(dst, bfReserved1); |
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449 SDL_WriteLE16(dst, bfReserved2); |
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450 SDL_WriteLE32(dst, bfOffBits); |
0 | 451 |
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452 /* Set the BMP info values */ |
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453 biSize = 40; |
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454 biWidth = surface->w; |
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455 biHeight = surface->h; |
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456 biPlanes = 1; |
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457 biBitCount = surface->format->BitsPerPixel; |
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458 biCompression = BI_RGB; |
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459 biSizeImage = surface->h * surface->pitch; |
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460 biXPelsPerMeter = 0; |
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461 biYPelsPerMeter = 0; |
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462 if (surface->format->palette) { |
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463 biClrUsed = surface->format->palette->ncolors; |
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464 } else { |
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465 biClrUsed = 0; |
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466 } |
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467 biClrImportant = 0; |
0 | 468 |
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469 /* Write the BMP info values */ |
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470 SDL_WriteLE32(dst, biSize); |
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471 SDL_WriteLE32(dst, biWidth); |
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472 SDL_WriteLE32(dst, biHeight); |
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473 SDL_WriteLE16(dst, biPlanes); |
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474 SDL_WriteLE16(dst, biBitCount); |
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475 SDL_WriteLE32(dst, biCompression); |
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476 SDL_WriteLE32(dst, biSizeImage); |
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477 SDL_WriteLE32(dst, biXPelsPerMeter); |
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478 SDL_WriteLE32(dst, biYPelsPerMeter); |
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479 SDL_WriteLE32(dst, biClrUsed); |
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480 SDL_WriteLE32(dst, biClrImportant); |
0 | 481 |
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482 /* Write the palette (in BGR color order) */ |
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483 if (surface->format->palette) { |
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484 SDL_Color *colors; |
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485 int ncolors; |
0 | 486 |
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487 colors = surface->format->palette->colors; |
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488 ncolors = surface->format->palette->ncolors; |
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489 for (i = 0; i < ncolors; ++i) { |
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490 SDL_RWwrite(dst, &colors[i].b, 1, 1); |
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491 SDL_RWwrite(dst, &colors[i].g, 1, 1); |
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492 SDL_RWwrite(dst, &colors[i].r, 1, 1); |
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493 SDL_RWwrite(dst, &colors[i].unused, 1, 1); |
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494 } |
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495 } |
0 | 496 |
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497 /* Write the bitmap offset */ |
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498 bfOffBits = SDL_RWtell(dst) - fp_offset; |
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499 if (SDL_RWseek(dst, fp_offset + 10, RW_SEEK_SET) < 0) { |
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500 SDL_Error(SDL_EFSEEK); |
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501 } |
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502 SDL_WriteLE32(dst, bfOffBits); |
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503 if (SDL_RWseek(dst, fp_offset + bfOffBits, RW_SEEK_SET) < 0) { |
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504 SDL_Error(SDL_EFSEEK); |
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505 } |
0 | 506 |
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507 /* Write the bitmap image upside down */ |
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508 bits = (Uint8 *) surface->pixels + (surface->h * surface->pitch); |
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509 pad = ((bw % 4) ? (4 - (bw % 4)) : 0); |
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510 while (bits > (Uint8 *) surface->pixels) { |
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511 bits -= surface->pitch; |
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512 if (SDL_RWwrite(dst, bits, 1, bw) != bw) { |
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513 SDL_Error(SDL_EFWRITE); |
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514 break; |
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515 } |
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516 if (pad) { |
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517 const Uint8 padbyte = 0; |
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518 for (i = 0; i < pad; ++i) { |
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519 SDL_RWwrite(dst, &padbyte, 1, 1); |
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520 } |
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521 } |
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522 } |
0 | 523 |
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524 /* Write the BMP file size */ |
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525 bfSize = SDL_RWtell(dst) - fp_offset; |
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526 if (SDL_RWseek(dst, fp_offset + 2, RW_SEEK_SET) < 0) { |
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527 SDL_Error(SDL_EFSEEK); |
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528 } |
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529 SDL_WriteLE32(dst, bfSize); |
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530 if (SDL_RWseek(dst, fp_offset + bfSize, RW_SEEK_SET) < 0) { |
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531 SDL_Error(SDL_EFSEEK); |
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532 } |
0 | 533 |
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534 /* Close it up.. */ |
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535 SDL_UnlockSurface(surface); |
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536 if (surface != saveme) { |
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537 SDL_FreeSurface(surface); |
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538 } |
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539 } |
0 | 540 |
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541 if (freedst && dst) { |
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542 SDL_RWclose(dst); |
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543 } |
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544 return ((SDL_strcmp(SDL_GetError(), "") == 0) ? 0 : -1); |
0 | 545 } |
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546 |
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547 /* vi: set ts=4 sw=4 expandtab: */ |