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annotate tools/libgfx.h @ 1809:a20655e40e6c

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Move ILBM function declarations to position that better reflects their location in the code.
author Matti Hamalainen <ccr@tnsp.org>
date Thu, 21 Jun 2018 11:14:26 +0300
parents 0562dd55a1f6
children 1af79412f249
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1 /*
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2 * Functions for loading and saving bitmap images
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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4 * (C) Copyright 2012 Tecnic Software productions (TNSP)
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5 *
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6 * Please read file 'COPYING' for information on license and distribution.
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7 */
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8 #ifndef LIBMGFX_H
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9 #define LIBMGFX_H 1
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10
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11 #include "dmlib.h"
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12 #include "dmres.h"
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13
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14
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15 #ifdef __cplusplus
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16 extern "C" {
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17 #endif
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18
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19
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20 enum
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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_ILBM,
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26 DM_IMGFMT_RAW,
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27 DM_IMGFMT_ARAW,
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28 };
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29
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30
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31 enum
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32 {
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33 DM_COLFMT_PALETTE,
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34 DM_COLFMT_RGB,
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35 DM_COLFMT_RGBA,
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36 };
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37
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38
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39 // Error handling modes
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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
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48 // Probe scores
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49 enum
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50 {
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51 DM_PROBE_SCORE_FALSE = 0,
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52 DM_PROBE_SCORE_MAYBE = 250,
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53 DM_PROBE_SCORE_AVG = 500,
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54 DM_PROBE_SCORE_GOOD = 750,
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55 DM_PROBE_SCORE_MAX = 1000,
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56 };
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57
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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
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70 typedef struct
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71 {
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72 int format; // one of types specified by DM_COLFMT_*
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73 int width, height;
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74 int pitch; // bytes per scanline
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75 int bpp; // bits per pixel
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76
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77 float aspect; // aspect ratio (vert / horiz), <= 0 if not set
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78
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79 int ncolors; // number of colors in palette, if any
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80 int ctransp; // transparency color index
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81 BOOL constpal; // is the palette a const?
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82 DMColor *pal; // pointer to palette struct, NULL if no palette
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83
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84 size_t size;
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85 Uint8 *data;
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86 } DMImage;
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87
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88
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89 typedef struct
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90 {
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91 int format;
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92 int scaleX, scaleY;
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93 int nplanes, bpp;
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94 BOOL planar, paletted;
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95 } DMImageConvSpec;
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96
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97
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98 typedef struct
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99 {
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100 char *fext;
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101 char *name;
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102 int fmtid; // DM_IMGFMT_*
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103 int flags; // DM_FMT_* flags
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104 int (*probe)(const Uint8 *buf, const size_t len);
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105 int (*read)(const char *filename, DMImage **pimg);
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106 int (*readFILE)(DMResource *fp, DMImage **pimg);
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107 int (*write)(const char *filename, const DMImage *pimg, const DMImageConvSpec *spec);
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108 int (*writeFILE)(DMResource *fp, const DMImage *pimg, const DMImageConvSpec *spec);
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109 } DMImageFormat;
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110
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111
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112 extern const DMImageFormat dmImageFormatList[];
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113 extern const int ndmImageFormatList;
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114 extern int dmGFXErrorMode;
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115
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116
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117 DMImage * dmImageAlloc(const int width, const int height, const int format, const int bpp);
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118 void dmImageFree(DMImage *img);
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119 int dmImageGetBytesPerPixel(const int format);
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120 int dmImageProbeGeneric(const Uint8 *buf, const size_t len, const DMImageFormat **fmt, int *index);
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121
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122 BOOL dmCompareColor(const DMColor *c1, const DMColor *c2, BOOL alpha);
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123 BOOL dmPaletteAlloc(DMColor **ppal, int ncolors, int ctransp);
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124 BOOL dmImagePaletteAlloc(DMImage *img, int ncolors, int ctransp);
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125
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126
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127 int dmWriteImageData(const DMImage *img, void *cbdata, int (*writeRowCB)(void *, const Uint8 *, const size_t), const DMImageConvSpec *spec);
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128
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129 int dmWriteRAWImageFILE(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec);
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130 int dmWriteRAWImage(const char *filename, const DMImage *img, const DMImageConvSpec *spec);
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131
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132 int dmWritePPMImageFILE(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec);
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133 int dmWritePPMImage(const char *filename, const DMImage *img, const DMImageConvSpec *spec);
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134
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135 #ifdef DM_USE_LIBPNG
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136 int dmWritePNGImageFILE(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec);
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137 int dmWritePNGImage(const char *filename, const DMImage *img, const DMImageConvSpec *spec);
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138 #endif
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139
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140 int dmWritePCXImageFILE(DMResource *fp, const DMImage *img, const DMImageConvSpec *spec);
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141 int dmWritePCXImage(const char *filename, const DMImage *img, const DMImageConvSpec *spec);
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142 int dmReadPCXImageFILE(DMResource *fp, DMImage **pimg);
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143 int dmReadPCXImage(const char *filename, DMImage **pimg);
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144
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145 int dmReadILBMImageFILE(DMResource *fp, DMImage **pimg);
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146 int dmReadILBMImage(const char *filename, DMImage **pimg);
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147
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148
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149 typedef struct _DMBitStreamContext
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150 {
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151 void *handle;
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152
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153 BOOL (*putByte)(struct _DMBitStreamContext *ctx, Uint8 val);
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154
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155 int outBuf, outBitCount, outByteCount;
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156 } DMBitStreamContext;
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157
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158
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159 void dmInitBitStreamContext(DMBitStreamContext *ctx);
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160 int dmFlushBitStream(DMBitStreamContext *ctx);
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161 BOOL dmPutBits(DMBitStreamContext *ctx, const int val, const int n);
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162 int dmInitBitStreamFILE(DMBitStreamContext *ctx, DMResource *fp);
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163
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164
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165
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166 #ifdef __cplusplus
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167 }
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168 #endif
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169
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170 #endif // LIBMGFX_H