Mercurial > hg > dmlib
annotate tools/libgfx.h @ 1309:5ad7d780a09b
Move bitstream reading functions to libgfx, as they were only used there.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sat, 19 Aug 2017 15:27:43 +0300 |
| parents | 43b13dbbdcd1 |
| children | ae2ba8cb510f |
| rev | line source |
|---|---|
| 435 | 1 /* |
| 2 * Functions for loading and saving bitmap images | |
| 3 * Programmed and designed by Matti 'ccr' Hamalainen | |
| 4 * (C) Copyright 2012 Tecnic Software productions (TNSP) | |
| 5 * | |
| 6 * Please read file 'COPYING' for information on license and distribution. | |
| 7 */ | |
| 8 #ifndef LIBMGFX_H | |
| 9 #define LIBMGFX_H 1 | |
| 10 | |
| 11 #include "dmlib.h" | |
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12 |
| 435 | 13 |
| 14 #ifdef __cplusplus | |
| 15 extern "C" { | |
| 16 #endif | |
| 17 | |
| 18 | |
| 19 enum | |
| 20 { | |
| 21 IMGFMT_PNG, | |
| 22 IMGFMT_PPM, | |
| 23 IMGFMT_PCX, | |
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Beginnings of IFF ILBM reader. Not functional, only chunk parsing,
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24 IMGFMT_ILBM, |
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25 IMGFMT_RAW, |
| 435 | 26 IMGFMT_ARAW, |
| 27 | |
| 28 IMGFMT_LAST | |
| 29 }; | |
| 30 | |
| 31 | |
| 32 enum | |
| 33 { | |
| 34 DM_IFMT_PALETTE, | |
| 35 DM_IFMT_RGB, | |
| 36 DM_IFMT_RGBA, | |
| 37 }; | |
| 38 | |
| 39 | |
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40 enum |
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41 { |
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42 DM_ERRMODE_FAIL = 0, |
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43 DM_ERRMODE_RECOV_1, |
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44 DM_ERRMODE_RECOV_2, |
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45 }; |
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46 |
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47 |
| 1286 | 48 // Bitmapped image struct |
| 435 | 49 typedef struct |
| 50 { | |
| 1286 | 51 int format; // one of types specified by DM_IFMT_* |
| 52 int width, height; | |
| 53 int pitch; // bytes per scanline | |
| 54 int bpp; // bits per pixel | |
| 55 | |
| 56 int ncolors; // number of colors in palette, if any | |
| 57 int ctransp; // transparency color index | |
| 58 BOOL constpal; // is the palette a const? | |
| 59 DMColor *pal; // pointer to palette struct, NULL if no palette | |
| 60 | |
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61 size_t size; |
| 435 | 62 Uint8 *data; |
| 63 } DMImage; | |
| 64 | |
| 65 | |
| 66 typedef struct | |
| 67 { | |
| 1288 | 68 int format; |
| 69 int scaleX, scaleY; | |
| 70 int nplanes, bpp; | |
| 1291 | 71 BOOL planar, paletted; |
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72 } DMImageConvSpec; |
| 435 | 73 |
| 74 | |
| 75 typedef struct | |
| 76 { | |
| 77 char *fext; | |
| 78 char *desc; | |
| 79 int (*probe)(const Uint8 *buf, const size_t len); | |
| 80 int (*read)(const char *filename, DMImage **pimg); | |
| 81 int (*readFILE)(FILE *fp, DMImage **pimg); | |
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82 int (*write)(const char *filename, DMImage *pimg, const DMImageConvSpec *spec); |
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83 int (*writeFILE)(FILE *fp, DMImage *pimg, const DMImageConvSpec *spec); |
| 435 | 84 } DMImageFormat; |
| 85 | |
| 86 | |
| 87 // Probe scores | |
| 88 #define DM_PROBE_SCORE_MAX 1000 | |
| 89 #define DM_PROBE_SCORE_GOOD 750 | |
| 90 #define DM_PROBE_SCORE_AVG 500 | |
| 91 #define DM_PROBE_SCORE_MAYBE 250 | |
| 92 #define DM_PROBE_SCORE_FALSE 0 | |
| 93 | |
| 94 | |
| 95 extern DMImageFormat dmImageFormatList[IMGFMT_LAST]; | |
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96 extern int dmGFXErrorMode; |
| 435 | 97 |
| 98 | |
| 1286 | 99 DMImage * dmImageAlloc(const int width, const int height, const int format, const int bpp); |
| 435 | 100 void dmImageFree(DMImage *img); |
| 1286 | 101 int dmImageGetBytesPerPixel(const int format); |
| 435 | 102 int dmImageProbeGeneric(const Uint8 *buf, const size_t len, DMImageFormat **fmt, int *index); |
| 103 | |
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104 BOOL dmCompareColor(const DMColor *c1, const DMColor *c2, BOOL alpha); |
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105 |
| 435 | 106 |
| 1301 | 107 int dmWriteImageData(DMImage *img, void *cbdata, int (*writeRowCB)(void *, const Uint8 *, const size_t), const DMImageConvSpec *spec); |
| 435 | 108 |
| 462 | 109 int dmWriteIFFMasterRAWPalette(FILE *fp, DMImage *img, int ncolors, const char *indent, const char *type); |
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110 int dmWriteRAWImageFILE(FILE *fp, DMImage *img, const DMImageConvSpec *spec); |
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111 int dmWriteRAWImage(const char *filename, DMImage *img, const DMImageConvSpec *spec); |
| 435 | 112 |
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113 int dmWritePPMImageFILE(FILE *fp, DMImage *img, const DMImageConvSpec *spec); |
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114 int dmWritePPMImage(const char *filename, DMImage *img, const DMImageConvSpec *spec); |
| 435 | 115 |
| 116 #ifdef DM_USE_LIBPNG | |
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117 int dmWritePNGImageFILE(FILE *fp, DMImage *img, const DMImageConvSpec *spec); |
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118 int dmWritePNGImage(const char *filename, DMImage *img, const DMImageConvSpec *spec); |
| 435 | 119 #endif |
| 120 | |
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121 int dmWritePCXImageFILE(FILE *fp, DMImage *img, const DMImageConvSpec *spec); |
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122 int dmWritePCXImage(const char *filename, DMImage *img, const DMImageConvSpec *spec); |
| 435 | 123 int dmReadPCXImageFILE(FILE *fp, DMImage **pimg); |
| 124 int dmReadPCXImage(const char *filename, DMImage **pimg); | |
| 125 | |
| 126 | |
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127 typedef struct _DMBitStreamContext |
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128 { |
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129 void *handle; |
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130 |
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131 BOOL (*putByte)(struct _DMBitStreamContext *ctx, Uint8 val); |
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132 |
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133 int outBuf, outBitCount, outByteCount; |
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134 } DMBitStreamContext; |
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135 |
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136 |
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137 void dmInitBitStreamContext(DMBitStreamContext *ctx); |
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138 int dmFlushBitStream(DMBitStreamContext *ctx); |
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139 BOOL dmPutBits(DMBitStreamContext *ctx, const int val, const int n); |
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140 int dmInitBitStreamFILE(DMBitStreamContext *ctx, FILE *fp); |
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141 |
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142 |
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143 |
| 435 | 144 #ifdef __cplusplus |
| 145 } | |
| 146 #endif | |
| 147 | |
| 148 #endif // LIBMGFX_H |