Mercurial > hg > dmlib
annotate src/dmimage.c @ 1080:76b7d1d20545
Change message to debug.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Mon, 02 Mar 2015 05:00:50 +0200 |
parents | 509e6ed3a24e |
children | e06abfde6c39 |
rev | line source |
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0 | 1 /* |
2 * DMLib | |
3 * -- Bitmap image conversion and loading | |
4 * Programmed and designed by Matti 'ccr' Hamalainen | |
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5 * (C) Copyright 2012-2015 Tecnic Software productions (TNSP) |
0 | 6 */ |
7 #include "dmimage.h" | |
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8 #include "dmzlib.h" |
0 | 9 |
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10 #ifndef DM_DEBUG |
900 | 11 #define STBI_NO_FAILURE_STRINGS 1 |
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12 #endif |
900 | 13 #define STBI_FAILURE_USERMSG 1 |
14 | |
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15 #define STB_IMAGE_IMPLEMENTATION 1 |
0 | 16 #define STBI_NO_STDIO 1 |
17 #define STBI_NO_HDR 1 | |
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18 |
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19 #define STBI_MALLOC(sz) dmMalloc(sz) |
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20 #define STBI_REALLOC(p,sz) dmRealloc(p,sz) |
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21 #define STBI_FREE(p) dmFree(p) |
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22 |
0 | 23 #include "stb_image.c" |
24 | |
25 | |
26 SDL_Surface *dmCreateRGBSurfaceFrom(void *data, const int width, const int height, const int depth, const int pitch, const int rmask, const int gmask, const int bmask, const int amask) | |
27 { | |
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28 // Create source surface from given data |
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29 SDL_Surface *tmp = SDL_CreateRGBSurfaceFrom(data, width, height, depth, pitch, bmask, gmask, rmask, amask); |
0 | 30 |
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31 // Result surface component orders as masks |
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32 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
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33 Uint32 |
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34 Xrmask = 0xff000000, |
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35 Xgmask = 0x00ff0000, |
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36 Xbmask = 0x0000ff00, |
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37 Xamask = 0x000000ff; |
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38 #else |
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39 Uint32 |
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40 Xrmask = 0x000000ff, |
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41 Xgmask = 0x0000ff00, |
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42 Xbmask = 0x00ff0000, |
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43 Xamask = 0xff000000; |
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44 #endif |
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45 |
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46 // Create result conversion surface |
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47 SDL_Surface |
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48 *result = NULL, |
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49 *pixtmp = SDL_CreateRGBSurface( |
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50 SDL_SWSURFACE | SDL_SRCALPHA, 16, 16, 32, Xrmask, Xgmask, Xbmask, Xamask); |
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51 |
0 | 52 if (tmp != NULL && pixtmp != NULL) |
53 { | |
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54 // Convert surface |
0 | 55 result = SDL_ConvertSurface(tmp, pixtmp->format, SDL_SWSURFACE | SDL_SRCALPHA); |
56 SDL_FreeSurface(tmp); | |
57 } | |
58 if (pixtmp != NULL) | |
59 SDL_FreeSurface(pixtmp); | |
60 | |
61 return result; | |
62 } | |
63 | |
64 | |
65 SDL_Surface *dmCreatePaletteSurfaceFrom(void *data, const int width, const int height, const int pitch) | |
66 { | |
67 int yc; | |
68 Uint8 *dst, *src; | |
69 SDL_Surface *result; | |
70 result = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 8, 0,0,0,0); | |
71 if (result == NULL) | |
72 return NULL; | |
73 | |
74 dst = result->pixels; | |
75 src = data; | |
76 for (yc = 0; yc < height; yc++) | |
77 { | |
78 memcpy(dst, src, width * sizeof(Uint8)); | |
79 dst += result->pitch; | |
80 src += pitch; | |
81 } | |
82 | |
83 return result; | |
84 } | |
85 | |
86 | |
87 | |
88 static int dmSTBIread(void *user, char *data, int size) | |
89 { | |
90 return dmfread(data, 1, size, (DMResource *) user); | |
91 } | |
92 | |
93 | |
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94 static void dmSTBIskip(void *user, int n) |
0 | 95 { |
96 dmfseek((DMResource *) user, n, SEEK_CUR); | |
97 } | |
98 | |
99 | |
100 static int dmSTBIeof(void *user) | |
101 { | |
102 return dmfeof((DMResource *) user); | |
103 } | |
104 | |
105 | |
106 static const stbi_io_callbacks dmSTBICallbacks = | |
107 { | |
108 dmSTBIread, | |
109 dmSTBIskip, | |
110 dmSTBIeof, | |
111 }; | |
112 | |
113 | |
114 SDL_Surface *dmLoadImage(DMResource *file) | |
115 { | |
116 Uint32 rmask, gmask, bmask, amask; | |
117 SDL_Surface *result = NULL; | |
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118 int width = 0, height = 0, comp = 0; |
0 | 119 Uint8 *data; |
120 | |
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121 dmfseek(file, 0, SEEK_SET); |
0 | 122 data = stbi_load_from_callbacks(&dmSTBICallbacks, file, &width, &height, &comp, 0); |
123 | |
124 if (data == NULL) | |
125 { | |
1080 | 126 dmErrorDBGMsg( |
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127 "Error decoding image resource %p '%s' [%d, %d, %d]: %s\n", |
0 | 128 file, file->filename, width, height, comp, stbi_failure_reason()); |
129 return NULL; | |
130 } | |
131 | |
132 | |
133 switch (comp) | |
134 { | |
135 case 4: | |
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136 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
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137 rmask = 0xff000000; |
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138 gmask = 0x00ff0000; |
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139 bmask = 0x0000ff00; |
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140 amask = 0x000000ff; |
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141 #else |
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142 rmask = 0x000000ff; |
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143 gmask = 0x0000ff00; |
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144 bmask = 0x00ff0000; |
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145 amask = 0xff000000; |
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146 #endif |
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147 result = dmCreateRGBSurfaceFrom(data, width, height, comp * 8, |
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148 width * comp, rmask, gmask, bmask, amask); |
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149 break; |
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150 |
0 | 151 case 3: |
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152 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
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153 rmask = 0x00ff0000; |
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154 gmask = 0x0000ff00; |
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155 bmask = 0x000000ff; |
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156 amask = 0x00000000; |
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157 #else |
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158 rmask = 0x000000ff; |
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159 gmask = 0x0000ff00; |
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160 bmask = 0x00ff0000; |
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161 amask = 0x00000000; |
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162 #endif |
0 | 163 result = dmCreateRGBSurfaceFrom(data, width, height, comp * 8, |
164 width * comp, rmask, gmask, bmask, amask); | |
165 break; | |
166 | |
167 case 1: | |
168 result = dmCreatePaletteSurfaceFrom(data, width, height, width * comp); | |
169 break; | |
170 } | |
171 | |
172 stbi_image_free(data); | |
173 | |
174 if (result == NULL) | |
175 { | |
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176 dmErrorDBGMsg( |
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177 "Format conversion failed for image resource %p '%s' [%d, %d, %d].\n", |
0 | 178 file, file->filename, width, height, comp); |
179 } | |
180 | |
181 return result; | |
182 } |