Mercurial > hg > dmlib
annotate tools/libgfx.h @ 2095:80786a28caf0
Mark image format flags with the color formats they support.
This information is not yet used.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Tue, 05 Mar 2019 09:57:32 +0200 |
parents | 4276b8c0fef0 |
children | 81fb21dd3265 |
rev | line source |
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435 | 1 /* |
2 * Functions for loading and saving bitmap images | |
3 * Programmed and designed by Matti 'ccr' Hamalainen | |
2066 | 4 * (C) Copyright 2012-2018 Tecnic Software productions (TNSP) |
435 | 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_ILBM, |
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26 DM_IMGFMT_IFF_PBM, |
2068 | 27 DM_IMGFMT_IFF_ACBM, |
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28 DM_IMGFMT_RAW, |
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29 DM_IMGFMT_ARAW, |
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30 DM_IMGFMT_CDUMP, |
435 | 31 }; |
32 | |
33 | |
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34 // Color formats (these can be used along with DM_FMT_*) |
435 | 35 enum |
36 { | |
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37 DM_COLFMT_PALETTE = 0x0010, |
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38 DM_COLFMT_GRAYSCALE = 0x0020, |
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39 DM_COLFMT_RGB = 0x0040, |
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40 DM_COLFMT_RGBA = 0x0080, |
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41 |
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42 DM_COLFMT_ANY = 0x00f0, |
435 | 43 }; |
44 | |
45 | |
1544 | 46 // Error handling modes |
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47 enum |
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48 { |
1544 | 49 DM_ERRMODE_FAIL = 0, |
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50 DM_ERRMODE_RECOV_1, |
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51 DM_ERRMODE_RECOV_2, |
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52 }; |
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53 |
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54 |
1544 | 55 // Probe scores |
56 enum | |
57 { | |
58 DM_PROBE_SCORE_FALSE = 0, | |
59 DM_PROBE_SCORE_MAYBE = 250, | |
60 DM_PROBE_SCORE_AVG = 500, | |
61 DM_PROBE_SCORE_GOOD = 750, | |
62 DM_PROBE_SCORE_MAX = 1000, | |
63 }; | |
64 | |
65 | |
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66 // Flags for readability/writeability of formats |
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67 enum |
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68 { |
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69 DM_FMT_WR = 0x0001, // Format can be written |
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70 DM_FMT_RD = 0x0002, // Format can be read |
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71 DM_FMT_RDWR = (DM_FMT_RD | DM_FMT_WR), // Read and write support |
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72 DM_FMT_BROKEN = 0x1000, // Support is broken/incomplete |
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73 }; |
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74 |
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75 |
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76 typedef struct |
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77 { |
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78 int ncolors; // number of colors in palette, if any |
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79 int ctransp; // transparency color index, -1 if none |
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80 DMColor *colors;// colors |
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81 } DMPalette; |
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82 |
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83 |
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84 // Bitmapped image struct |
435 | 85 typedef struct |
86 { | |
1801 | 87 int format; // one of types specified by DM_COLFMT_* |
1286 | 88 int width, height; |
89 int pitch; // bytes per scanline | |
90 int bpp; // bits per pixel | |
91 | |
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92 float aspect; // aspect ratio (vert / horiz), <= 0 if not set |
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93 |
1286 | 94 BOOL constpal; // is the palette a const? |
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95 DMPalette *pal; // pointer to palette struct, NULL if no palette |
1286 | 96 |
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97 size_t size; |
435 | 98 Uint8 *data; |
99 } DMImage; | |
100 | |
101 | |
102 typedef struct | |
103 { | |
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104 int fmtid; // DM_IMGFMT_* of target format (a bit of a kludge here) |
2070 | 105 int format; // Target color format DM_COLFMT_* |
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106 int scaleX, scaleY; // Scale factors (1..) |
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107 int nplanes, bpp, mask; |
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108 BOOL planar; |
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109 int compression; // Use compression/compression level (0 = none, 9 = max) |
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110 } DMImageConvSpec; |
435 | 111 |
112 | |
113 typedef struct | |
114 { | |
115 char *fext; | |
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116 char *name; |
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117 int fmtid; // DM_IMGFMT_* |
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118 int flags; // DM_FMT_* and DM_COLFMT_* flags |
435 | 119 int (*probe)(const Uint8 *buf, const size_t len); |
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120 int (*read)(DMResource *fp, DMImage **pimg); |
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121 int (*write)(DMResource *fp, const DMImage *pimg, const DMImageConvSpec *spec); |
435 | 122 } DMImageFormat; |
123 | |
124 | |
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125 extern const DMImageFormat dmImageFormatList[]; |
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126 extern const int ndmImageFormatList; |
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127 extern int dmGFXErrorMode; |
435 | 128 |
129 | |
1286 | 130 DMImage * dmImageAlloc(const int width, const int height, const int format, const int bpp); |
435 | 131 void dmImageFree(DMImage *img); |
1286 | 132 int dmImageGetBytesPerPixel(const int format); |
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133 int dmImageGetBitsPerPixel(const int format); |
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134 int dmImageProbeGeneric(const Uint8 *buf, const size_t len, const DMImageFormat **fmt, int *index); |
435 | 135 |
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136 BOOL dmCompareColor(const DMColor *c1, const DMColor *c2, const BOOL alpha); |
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137 int dmPaletteAlloc(DMPalette **ppal, const int ncolors, const int ctransp); |
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138 int dmPaletteResize(DMPalette **ppal, const int ncolors); |
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139 void dmPaletteFree(DMPalette *pal); |
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140 int dmPaletteCopy(DMPalette **pdst, const DMPalette *src); |
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141 |
435 | 142 |
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143 int dmWriteImageData(const DMImage *img, void *cbdata, |
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144 int (*writeRowCB)(void *, const Uint8 *, const size_t), const DMImageConvSpec *spec); |
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145 |
435 | 146 |
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147 int dmWriteIFFMasterRAWHeader(DMResource *fp, const char *filename, const char *prefix, const DMImage *img, const DMImageConvSpec *spec); |
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148 int dmWriteRAWImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
435 | 149 |
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150 int dmWritePPMImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
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151 int dmReadPPMImage(DMResource *fp, DMImage **pimg); |
435 | 152 |
153 #ifdef DM_USE_LIBPNG | |
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154 int dmWritePNGImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
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155 int dmReadPNGImage(DMResource *fp, DMImage **pimg); |
435 | 156 #endif |
157 | |
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158 int dmWritePCXImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
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159 int dmReadPCXImage(DMResource *fp, DMImage **pimg); |
435 | 160 |
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161 int dmReadIFFImage(DMResource *fp, DMImage **pimg); |
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162 int dmWriteIFFImage(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec); |
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163 |
435 | 164 |
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165 typedef struct _DMBitStreamContext |
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166 { |
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167 void *handle; |
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168 |
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169 int (*putByte)(struct _DMBitStreamContext *ctx); |
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170 int (*getByte)(struct _DMBitStreamContext *ctx); |
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171 |
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172 unsigned int |
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173 outBuf, outBitCount, outByteCount, |
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174 inBuf, inBitCount, inByteCount; |
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175 } DMBitStreamContext; |
5ad7d780a09b
Move bitstream reading functions to libgfx, as they were only used there.
Matti Hamalainen <ccr@tnsp.org>
parents:
1307
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176 |
5ad7d780a09b
Move bitstream reading functions to libgfx, as they were only used there.
Matti Hamalainen <ccr@tnsp.org>
parents:
1307
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177 |
5ad7d780a09b
Move bitstream reading functions to libgfx, as they were only used there.
Matti Hamalainen <ccr@tnsp.org>
parents:
1307
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178 void dmInitBitStreamContext(DMBitStreamContext *ctx); |
5ad7d780a09b
Move bitstream reading functions to libgfx, as they were only used there.
Matti Hamalainen <ccr@tnsp.org>
parents:
1307
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179 int dmFlushBitStream(DMBitStreamContext *ctx); |
2086
aedadff9e116
Implement dmGetBits() to the DMBitStreamContext API. Also improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
2070
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180 int dmInitBitStreamRes(DMBitStreamContext *ctx, DMResource *fp); |
aedadff9e116
Implement dmGetBits() to the DMBitStreamContext API. Also improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
2070
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181 |
aedadff9e116
Implement dmGetBits() to the DMBitStreamContext API. Also improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
2070
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182 int dmPutBits(DMBitStreamContext *ctx, const unsigned int val, const unsigned int n); |
aedadff9e116
Implement dmGetBits() to the DMBitStreamContext API. Also improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
2070
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183 int dmGetBits(DMBitStreamContext *ctx, unsigned int *val, const unsigned int n); |
1309
5ad7d780a09b
Move bitstream reading functions to libgfx, as they were only used there.
Matti Hamalainen <ccr@tnsp.org>
parents:
1307
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184 |
5ad7d780a09b
Move bitstream reading functions to libgfx, as they were only used there.
Matti Hamalainen <ccr@tnsp.org>
parents:
1307
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185 |
435 | 186 #ifdef __cplusplus |
187 } | |
188 #endif | |
189 | |
190 #endif // LIBMGFX_H |