Mercurial > hg > dmlib
annotate src/dmimage.c @ 950:88d9440afad0
Use dmzlib module in stb_image.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 26 Feb 2015 18:35:29 +0200 |
| parents | df2a9c635175 |
| children | 985225a93aeb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * DMLib | |
| 3 * -- Bitmap image conversion and loading | |
| 4 * Programmed and designed by Matti 'ccr' Hamalainen | |
|
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Use dmzlib module in stb_image.
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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 |
| 10 | |
| 900 | 11 #define STBI_NO_FAILURE_STRINGS 1 |
| 12 #define STBI_FAILURE_USERMSG 1 | |
| 13 | |
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14 #define STB_IMAGE_IMPLEMENTATION 1 |
| 0 | 15 #define STBI_NO_STDIO 1 |
| 16 #define STBI_NO_HDR 1 | |
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17 |
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18 #define STBI_MALLOC(sz) dmMalloc(sz) |
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19 #define STBI_REALLOC(p,sz) dmRealloc(p,sz) |
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20 #define STBI_FREE(p) dmFree(p) |
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21 |
| 0 | 22 #include "stb_image.c" |
| 23 | |
| 24 | |
| 25 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) | |
| 26 { | |
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27 // Create source surface from given data |
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28 SDL_Surface *tmp = SDL_CreateRGBSurfaceFrom(data, width, height, depth, pitch, bmask, gmask, rmask, amask); |
| 0 | 29 |
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30 // Result surface component orders as masks |
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31 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
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32 Uint32 |
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33 Xrmask = 0xff000000, |
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34 Xgmask = 0x00ff0000, |
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35 Xbmask = 0x0000ff00, |
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36 Xamask = 0x000000ff; |
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37 #else |
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38 Uint32 |
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39 Xrmask = 0x000000ff, |
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40 Xgmask = 0x0000ff00, |
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41 Xbmask = 0x00ff0000, |
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42 Xamask = 0xff000000; |
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43 #endif |
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44 |
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45 // Create result conversion surface |
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46 SDL_Surface |
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47 *result = NULL, |
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48 *pixtmp = SDL_CreateRGBSurface( |
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49 SDL_SWSURFACE | SDL_SRCALPHA, 16, 16, 32, Xrmask, Xgmask, Xbmask, Xamask); |
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50 |
| 0 | 51 if (tmp != NULL && pixtmp != NULL) |
| 52 { | |
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53 // Convert surface |
| 0 | 54 result = SDL_ConvertSurface(tmp, pixtmp->format, SDL_SWSURFACE | SDL_SRCALPHA); |
| 55 SDL_FreeSurface(tmp); | |
| 56 } | |
| 57 if (pixtmp != NULL) | |
| 58 SDL_FreeSurface(pixtmp); | |
| 59 | |
| 60 return result; | |
| 61 } | |
| 62 | |
| 63 | |
| 64 SDL_Surface *dmCreatePaletteSurfaceFrom(void *data, const int width, const int height, const int pitch) | |
| 65 { | |
| 66 int yc; | |
| 67 Uint8 *dst, *src; | |
| 68 SDL_Surface *result; | |
| 69 result = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 8, 0,0,0,0); | |
| 70 if (result == NULL) | |
| 71 return NULL; | |
| 72 | |
| 73 dst = result->pixels; | |
| 74 src = data; | |
| 75 for (yc = 0; yc < height; yc++) | |
| 76 { | |
| 77 memcpy(dst, src, width * sizeof(Uint8)); | |
| 78 dst += result->pitch; | |
| 79 src += pitch; | |
| 80 } | |
| 81 | |
| 82 return result; | |
| 83 } | |
| 84 | |
| 85 | |
| 86 | |
| 87 static int dmSTBIread(void *user, char *data, int size) | |
| 88 { | |
| 89 return dmfread(data, 1, size, (DMResource *) user); | |
| 90 } | |
| 91 | |
| 92 | |
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93 static void dmSTBIskip(void *user, int n) |
| 0 | 94 { |
| 95 dmfseek((DMResource *) user, n, SEEK_CUR); | |
| 96 } | |
| 97 | |
| 98 | |
| 99 static int dmSTBIeof(void *user) | |
| 100 { | |
| 101 return dmfeof((DMResource *) user); | |
| 102 } | |
| 103 | |
| 104 | |
| 105 static const stbi_io_callbacks dmSTBICallbacks = | |
| 106 { | |
| 107 dmSTBIread, | |
| 108 dmSTBIskip, | |
| 109 dmSTBIeof, | |
| 110 }; | |
| 111 | |
| 112 | |
| 113 SDL_Surface *dmLoadImage(DMResource *file) | |
| 114 { | |
| 115 Uint32 rmask, gmask, bmask, amask; | |
| 116 SDL_Surface *result = NULL; | |
| 117 int width, height, comp; | |
| 118 Uint8 *data; | |
| 119 | |
| 120 data = stbi_load_from_callbacks(&dmSTBICallbacks, file, &width, &height, &comp, 0); | |
| 121 | |
| 122 if (data == NULL) | |
| 123 { | |
| 124 dmError("Error decoding image resource %p '%s' [%d, %d, %d]: %s\n", | |
| 125 file, file->filename, width, height, comp, stbi_failure_reason()); | |
| 126 return NULL; | |
| 127 } | |
| 128 | |
| 129 | |
| 130 switch (comp) | |
| 131 { | |
| 132 case 4: | |
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133 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
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134 rmask = 0xff000000; |
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135 gmask = 0x00ff0000; |
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136 bmask = 0x0000ff00; |
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137 amask = 0x000000ff; |
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138 #else |
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139 rmask = 0x000000ff; |
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140 gmask = 0x0000ff00; |
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141 bmask = 0x00ff0000; |
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142 amask = 0xff000000; |
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143 #endif |
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144 result = dmCreateRGBSurfaceFrom(data, width, height, comp * 8, |
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145 width * comp, rmask, gmask, bmask, amask); |
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146 break; |
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147 |
| 0 | 148 case 3: |
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149 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
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150 rmask = 0x00ff0000; |
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151 gmask = 0x0000ff00; |
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152 bmask = 0x000000ff; |
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153 amask = 0x00000000; |
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154 #else |
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155 rmask = 0x000000ff; |
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156 gmask = 0x0000ff00; |
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157 bmask = 0x00ff0000; |
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158 amask = 0x00000000; |
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159 #endif |
| 0 | 160 result = dmCreateRGBSurfaceFrom(data, width, height, comp * 8, |
| 161 width * comp, rmask, gmask, bmask, amask); | |
| 162 break; | |
| 163 | |
| 164 case 1: | |
| 165 result = dmCreatePaletteSurfaceFrom(data, width, height, width * comp); | |
| 166 break; | |
| 167 } | |
| 168 | |
| 169 stbi_image_free(data); | |
| 170 | |
| 171 if (result == NULL) | |
| 172 { | |
| 173 dmError("Format conversion failed for image resource %p '%s' [%d, %d, %d].\n", | |
| 174 file, file->filename, width, height, comp); | |
| 175 } | |
| 176 | |
| 177 return result; | |
| 178 } |