Mercurial > hg > dmlib
annotate tools/libgfx.h @ 1896:f80b2dc77c30
Work begins on IFF ILBM/PBM image writer. It is pretty broken, some things
will not work and some things are hardcoded. The ByteRun1 compression
implementation is somewhat inefficient. Interleaved files do not work yet.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Tue, 26 Jun 2018 03:13:38 +0300 |
| parents | cbc911ffd21e |
| children | ee9bbf891352 |
| 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 #include "dmres.h" |
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13 |
| 435 | 14 |
| 15 #ifdef __cplusplus | |
| 16 extern "C" { | |
| 17 #endif | |
| 18 | |
| 19 | |
| 20 enum | |
| 21 { | |
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22 DM_IMGFMT_PNG, |
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23 DM_IMGFMT_PPM, |
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24 DM_IMGFMT_PCX, |
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25 DM_IMGFMT_IFF, |
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26 DM_IMGFMT_RAW, |
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27 DM_IMGFMT_ARAW, |
| 435 | 28 }; |
| 29 | |
| 30 | |
| 31 enum | |
| 32 { | |
| 1801 | 33 DM_COLFMT_PALETTE, |
| 34 DM_COLFMT_RGB, | |
| 35 DM_COLFMT_RGBA, | |
| 435 | 36 }; |
| 37 | |
| 38 | |
| 1544 | 39 // Error handling modes |
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40 enum |
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41 { |
| 1544 | 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 |
| 1544 | 48 // Probe scores |
| 49 enum | |
| 50 { | |
| 51 DM_PROBE_SCORE_FALSE = 0, | |
| 52 DM_PROBE_SCORE_MAYBE = 250, | |
| 53 DM_PROBE_SCORE_AVG = 500, | |
| 54 DM_PROBE_SCORE_GOOD = 750, | |
| 55 DM_PROBE_SCORE_MAX = 1000, | |
| 56 }; | |
| 57 | |
| 58 | |
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59 // Flags for readability/writeability of formats |
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60 enum |
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61 { |
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62 DM_FMT_WR = 0x0001, // Format can be written |
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63 DM_FMT_RD = 0x0002, // Format can be read |
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64 DM_FMT_RDWR = (DM_FMT_RD | DM_FMT_WR), // Read and write support |
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65 DM_FMT_BROKEN = 0x1000, // Support is broken/incomplete |
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66 }; |
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67 |
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68 |
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69 // Bitmapped image struct |
| 435 | 70 typedef struct |
| 71 { | |
| 1801 | 72 int format; // one of types specified by DM_COLFMT_* |
| 1286 | 73 int width, height; |
| 74 int pitch; // bytes per scanline | |
| 75 int bpp; // bits per pixel | |
| 76 | |
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77 float aspect; // aspect ratio (vert / horiz), <= 0 if not set |
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78 |
| 1286 | 79 int ncolors; // number of colors in palette, if any |
| 80 int ctransp; // transparency color index | |
| 81 BOOL constpal; // is the palette a const? | |
| 82 DMColor *pal; // pointer to palette struct, NULL if no palette | |
| 83 | |
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84 size_t size; |
| 435 | 85 Uint8 *data; |
| 86 } DMImage; | |
| 87 | |
| 88 | |
| 89 typedef struct | |
| 90 { | |
| 1288 | 91 int format; |
| 92 int scaleX, scaleY; | |
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93 int nplanes, bpp, mask; |
| 1291 | 94 BOOL planar, paletted; |
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95 int compression; |
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96 } DMImageConvSpec; |
| 435 | 97 |
| 98 | |
| 99 typedef struct | |
| 100 { | |
| 101 char *fext; | |
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102 char *name; |
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103 int fmtid; // DM_IMGFMT_* |
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104 int flags; // DM_FMT_* flags |
| 435 | 105 int (*probe)(const Uint8 *buf, const size_t len); |
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106 int (*read)(DMResource *fp, DMImage **pimg); |
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107 int (*write)(DMResource *fp, const DMImage *pimg, const DMImageConvSpec *spec); |
| 435 | 108 } DMImageFormat; |
| 109 | |
| 110 | |
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111 extern const DMImageFormat dmImageFormatList[]; |
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112 extern const int ndmImageFormatList; |
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113 extern int dmGFXErrorMode; |
| 435 | 114 |
| 115 | |
| 1286 | 116 DMImage * dmImageAlloc(const int width, const int height, const int format, const int bpp); |
| 435 | 117 void dmImageFree(DMImage *img); |
| 1286 | 118 int dmImageGetBytesPerPixel(const int format); |
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119 int dmImageProbeGeneric(const Uint8 *buf, const size_t len, const DMImageFormat **fmt, int *index); |
| 435 | 120 |
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121 BOOL dmCompareColor(const DMColor *c1, const DMColor *c2, BOOL alpha); |
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122 BOOL dmPaletteAlloc(DMColor **ppal, int ncolors, int ctransp); |
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123 BOOL dmImagePaletteAlloc(DMImage *img, int ncolors, int ctransp); |
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124 |
| 435 | 125 |
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126 int dmWriteImageData(const DMImage *img, void *cbdata, |
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127 int (*writeRowCB)(void *, const Uint8 *, const size_t), const DMImageConvSpec *spec); |
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128 |
| 435 | 129 |
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130 int dmWriteIFFMasterRAWHeader(DMResource *fp, const char *filename, const char *prefix, const DMImage *img, const DMImageConvSpec *spec, const int fmtid); |
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131 int dmWriteRAWImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
| 435 | 132 |
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133 int dmWritePPMImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
| 435 | 134 |
| 135 #ifdef DM_USE_LIBPNG | |
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136 int dmWritePNGImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
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137 int dmReadPNGImage(DMResource *fp, DMImage **pimg); |
| 435 | 138 #endif |
| 139 | |
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140 int dmWritePCXImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
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141 int dmReadPCXImage(DMResource *fp, DMImage **pimg); |
| 435 | 142 |
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143 int dmReadIFFImage(DMResource *fp, DMImage **pimg); |
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144 int dmWriteIFFImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
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145 |
| 435 | 146 |
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147 typedef struct _DMBitStreamContext |
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148 { |
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149 void *handle; |
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150 |
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151 BOOL (*putByte)(struct _DMBitStreamContext *ctx, Uint8 val); |
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152 |
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153 int outBuf, outBitCount, outByteCount; |
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154 } DMBitStreamContext; |
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155 |
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156 |
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157 void dmInitBitStreamContext(DMBitStreamContext *ctx); |
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158 int dmFlushBitStream(DMBitStreamContext *ctx); |
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159 BOOL dmPutBits(DMBitStreamContext *ctx, const int val, const int n); |
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160 int dmInitBitStreamFILE(DMBitStreamContext *ctx, DMResource *fp); |
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161 |
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162 |
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163 |
| 435 | 164 #ifdef __cplusplus |
| 165 } | |
| 166 #endif | |
| 167 | |
| 168 #endif // LIBMGFX_H |