Mercurial > hg > dmlib
annotate src/dmimage.c @ 1046:7e54b2d08ce7
Add special debug error message function/macro that can be
disabled and compiled out.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sun, 01 Mar 2015 18:03:08 +0200 |
| parents | c71fcf44b678 |
| children | 509e6ed3a24e |
| 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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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 { | |
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126 dmError(DMERR_DATA_ERROR, |
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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 dmErrorDBG(DMERR_DATA_ERROR, |
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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 } |