Mercurial > hg > dmlib
annotate tools/lib64gfx.h @ 1931:410679d2fe8a
"Enable" the image->c64 bitmap conversion path in gfxconv. It does not work
without the necessary bits elsewhere, though. Also add DMC64ImageConvSpec
structure for delivering conversion parameters, though it is not yet used
either.
author | Matti Hamalainen <ccr@tnsp.org> |
---|---|
date | Thu, 28 Jun 2018 17:26:30 +0300 |
parents | 42cd527a01b9 |
children | 10e82be38b8b |
rev | line source |
---|---|
407
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1 /* |
418 | 2 * Functions for reading and converting various restricted |
3 * C64/etc and/or indexed/paletted graphics formats. | |
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4 * Programmed and designed by Matti 'ccr' Hamalainen |
1456 | 5 * (C) Copyright 2012-2018 Tecnic Software productions (TNSP) |
407
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6 * |
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7 * Please read file 'COPYING' for information on license and distribution. |
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8 */ |
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9 #ifndef LIB64GFX_H |
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10 #define LIB64GFX_H 1 |
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11 |
435 | 12 #include "libgfx.h" |
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13 #include "dmgrowbuf.h" |
435 | 14 |
15 #ifdef __cplusplus | |
16 extern "C" { | |
17 #endif | |
18 | |
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19 |
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20 // Bitmap constants |
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21 #define C64_SCR_WIDTH 320 |
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22 #define C64_SCR_HEIGHT 200 |
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23 #define C64_SCR_CH_WIDTH (C64_SCR_WIDTH/8) |
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24 #define C64_SCR_CH_HEIGHT (C64_SCR_HEIGHT/8) |
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25 #define C64_MAX_EXTRA_DATA 64 |
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26 |
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27 // C64 video screen pixel aspect ratio on PAL |
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28 #define C64_SCR_PAR_XY (0.9365f) |
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29 |
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30 // Sprite constants |
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31 #define C64_SPR_WIDTH_PX 24 |
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32 #define C64_SPR_HEIGHT_PX 21 |
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33 #define C64_SPR_WIDTH_UT (C64_SPR_WIDTH_PX / 8) // bytes |
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34 #define C64_SPR_HEIGHT_UT C64_SPR_HEIGHT_PX |
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35 #define C64_SPR_SIZE ((C64_SPR_WIDTH_UT * C64_SPR_HEIGHT_UT) + 1) |
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36 |
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37 // Character constants |
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38 #define C64_CHR_WIDTH_PX 8 |
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39 #define C64_CHR_HEIGHT_PX 8 |
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40 #define C64_CHR_WIDTH_UT 1 // bytes |
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41 #define C64_CHR_HEIGHT_UT 8 // lines |
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42 #define C64_CHR_SIZE (C64_CHR_WIDTH_UT * C64_CHR_HEIGHT_UT) |
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43 |
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44 // Etc. |
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45 #define C64_NCOLORS 16 |
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46 #define C64_VIDBANK_SIZE (16*1024) |
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47 #define C64_MAX_SPRITES 1024 |
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48 #define C64_MAX_CHARS 256 |
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49 |
922 | 50 |
1637 | 51 // Different supported flags/modes |
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52 enum |
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53 { |
1637 | 54 D64_FMT_HIRES = 0x0000, // Hi-res |
55 D64_FMT_MC = 0x0001, // MultiColor | |
56 D64_FMT_ILACE = 0x0002, // Interlace | |
57 D64_FMT_FLI = 0x0004, // FLI | |
58 D64_FMT_CHAR = 0x0008, // Character mode | |
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59 D64_FMT_BORDER = 0x0010, // Uses border area |
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60 }; |
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61 |
1637 | 62 |
63 // Different types of interlace | |
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64 enum |
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65 { |
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66 D64_ILACE_NONE = 0x0000, // Not set (invalid for interlaced images) |
1637 | 67 D64_ILACE_RES = 0x0001, // Interlace doubles resolution |
68 D64_ILACE_COLOR = 0x0002, // Uses color mixing | |
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69 }; |
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70 |
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71 |
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72 // Charmode screen memory configuration |
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73 enum |
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74 { |
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75 D64_CHCFG_SCREEN, // Use screen memory |
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76 D64_CHCFG_LINEAR = 1, // Generate linear pattern so that first line |
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77 // of chars is 0-39, second 40-79, up to 255. |
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78 }; |
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79 |
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80 |
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81 // Image <-> bitmap conversion dithering |
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82 enum |
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83 { |
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84 D64_DITH_NONE = 0, // No dithering |
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85 }; |
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86 |
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87 |
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88 // Different enc/dec operation types (op->type) |
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89 enum |
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90 { |
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91 DO_COPY, // Perform copy between memory (from/to offset) and subject |
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92 DO_SET_MEM, // Set subject value or fill subject memory area to byte value from offset |
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93 DO_SET_OP, // Like above but value from op->offs field instead |
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94 |
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95 DO_SET_MEM_HI, // Copy one byte value like DO_SET_MEM, but high nibble only |
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96 DO_SET_MEM_LO, // Like above, but low nibble |
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97 |
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98 DO_FUNC, // Execute specified decoding / encoding function |
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99 |
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100 DO_CHAR_CFG, // Set character mode configuration |
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101 |
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102 DO_LAST, // Last opcode, end processing |
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103 }; |
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104 |
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105 |
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106 // "Subjects" of operations (op->subject) |
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107 enum |
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108 { |
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109 DS_COLOR_RAM, |
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110 DS_BITMAP_RAM, |
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111 DS_SCREEN_RAM, |
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112 DS_EXTRA_DATA, |
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113 DS_CHAR_DATA, |
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114 |
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115 DS_D020, |
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116 DS_BGCOL, |
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117 DS_D021, |
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118 DS_D022, |
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119 DS_D023, |
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120 DS_D024, |
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121 |
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122 DS_LAST |
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123 }; |
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124 |
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125 |
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126 typedef struct |
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127 { |
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128 int dither; // Dither mode (D64_DITH_*) |
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129 BOOL aspect; // Correct pixel aspect ratio? |
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130 } DMC64ImageConvSpec; |
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131 |
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132 |
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133 typedef struct |
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134 { |
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135 Uint8 *data; |
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136 size_t size; |
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137 } DMC64MemBlock; |
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138 |
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139 |
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140 typedef struct |
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141 { |
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142 BOOL multicolor, xexpand, yexpand; |
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143 int color, xc, yc; |
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144 Uint8 data[C64_SPR_HEIGHT_UT][C64_SPR_WIDTH_UT]; |
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145 } DMC64Sprite; |
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146 |
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147 |
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148 typedef struct _DMC64Image |
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149 { |
922 | 150 int type, // Image type (D64_FMT_*) |
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151 laceType, // Interlace type (D64_ILACE_*) |
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152 nbanks; |
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153 |
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154 int width, height; // Width and height in pixels |
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155 int chWidth, chHeight; // Width and height in charblocks |
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156 |
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157 // Bitmaps, color RAM, screen, etc. blocks * nbanks |
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158 // Not all of them may be allocated |
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159 DMC64MemBlock |
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160 *color, |
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161 *bitmap, |
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162 *screen, |
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163 *charData; |
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164 |
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165 // Other standard colours |
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166 Uint8 d020, bgcolor, d022, d023, d024; |
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167 |
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168 // Extra data areas used by some formats, |
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169 // for example raster colours might be stored |
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170 DMC64MemBlock extraData[C64_MAX_EXTRA_DATA]; |
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171 |
407
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172 DMC64Sprite sprites[C64_MAX_SPRITES]; |
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173 } DMC64Image; |
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174 |
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175 |
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176 typedef Uint8 (*DMC64GetPixelFunc)( |
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177 const DMC64Image *img, const int bmoffs, const int scroffs, |
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178 const int vshift, const int vbitmap, const int rasterX, const int rasterY); |
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179 |
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180 #define D64_MAX_ENCDEC_OPS 64 |
937 | 181 |
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182 |
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183 typedef struct _DMC64ImageFormat DMC64ImageFormat; |
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184 |
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185 |
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186 typedef struct _DMC64EncDecOp |
407
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187 { |
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188 int type; // Operation type (DO_*) |
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189 int subject; // Operation "subject" (DS_*) |
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190 |
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191 size_t offs; // Offset in "memory" |
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192 int bank; // Bank number or extradata index |
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193 size_t size; // Size of data (0 for "default") |
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194 size_t offs2; // Offset in data-block |
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195 |
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196 BOOL (*decFunction)(DMC64Image *img, const struct _DMC64EncDecOp *op, const DMGrowBuf *buf, const DMC64ImageFormat *fmt); |
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197 BOOL (*encFunction)(const struct _DMC64EncDecOp *op, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
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198 } DMC64EncDecOp; |
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199 |
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200 |
1592
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201 typedef DMC64EncDecOp DMC64EncDecOpList[D64_MAX_ENCDEC_OPS]; |
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202 |
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203 |
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204 typedef struct |
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205 { |
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206 int type; // Type flags, see D64_FMT_* |
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207 int width, height; // Width and height in pixels |
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208 int chWidth, chHeight; // Width and height in charblocks |
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209 |
1931
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210 int (*convertFrom)(DMImage *, const DMC64Image *, const DMC64ImageFormat *fmt, const DMC64ImageConvSpec *spec); |
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211 int (*convertTo)(DMC64Image *, const DMImage *, const DMC64ImageFormat *fmt, const DMC64ImageConvSpec *spec); |
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212 |
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213 DMC64GetPixelFunc getPixel; |
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214 |
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215 DMC64EncDecOpList encdecOps; |
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216 } DMC64ImageCommonFormat; |
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217 |
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218 |
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219 typedef struct _DMC64ImageFormat |
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220 { |
922 | 221 char *fext; // Filename extension |
222 char *name; // Format description/name | |
223 | |
511
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224 size_t addr; // Loading address (0 if no loading address) |
1495 | 225 size_t size; // Size, including loading address. Only used in probing and encoding. |
924
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226 |
1545
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227 int flags; // DM_FMT_* flags, see libgfx.h |
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228 |
1780
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229 int (*probe)(const DMGrowBuf *buf, const DMC64ImageFormat *fmt); |
1442 | 230 |
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231 int (*decode)(DMC64Image *img, const DMGrowBuf *buf, const DMC64ImageFormat *fmt); |
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232 int (*encode)(DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
1442 | 233 |
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234 DMC64ImageCommonFormat formatDef, *format; |
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235 } DMC64ImageFormat; |
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236 |
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237 |
1637 | 238 // |
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239 // Compression types and flags |
1637 | 240 // |
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241 enum |
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242 { |
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243 DM_COMP_RLE_MARKER = 1, // RLE with a separate marker byte |
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244 DM_COMP_RLE_MASK = 2, // RLE that has marker bits and lower part acts as run length |
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245 }; |
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246 |
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247 enum |
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248 { |
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249 DM_RLE_BYTE_RUNS = 0x0001, // Uses one-byte run lengths |
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250 DM_RLE_WORD_RUNS = 0x0002, // Uses two-byte (word) run lengths |
1825 | 251 DM_RLE_RUNS_MASK = 0x0003, |
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252 |
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253 DM_RLE_ORDER_1 = 0x0000, // Order: <marker>, <count/run length>, <data> |
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254 DM_RLE_ORDER_2 = 0x0010, // Order: <marker>, <data>, <count/run length> |
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255 DM_RLE_ORDER_MASK = 0x00f0, |
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256 |
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257 DM_RLE_BACKWARDS_INPUT = 0x0100, // Input is read backwards |
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258 DM_RLE_BACKWARDS_OUTPUT = 0x0200, // Output is written backwards |
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259 DM_RLE_ZERO_COUNT_MAX = 0x0400, // Zero "count" / run length value is max run (2^8, 2^16) |
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260 |
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261 DM_OUT_CROP_NONE = 0x0000, |
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262 DM_OUT_CROP_START = 0x1000, |
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263 DM_OUT_CROP_END = 0x2000, |
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264 DM_OUT_CROP_MASK = 0xf000, |
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265 }; |
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266 |
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267 |
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268 typedef struct |
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269 { |
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270 char *func; |
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271 int type; |
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272 int flags; |
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273 size_t cropOutLen; |
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274 |
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275 Uint8 |
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276 // DM_COMP_RLE_MARKER mode |
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277 rleMarkerB, // Marker byte for byte length runs (if DM_RLE_BYTE_RUNS used) |
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278 rleMarkerW, // Marker byte for word length runs (if DM_RLE_WORD_RUNS used) |
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279 |
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280 // DM_COMP_RLE_MASK mode |
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281 rleMarkerBits, |
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282 rleMarkerMask, // Mask bits for marker: data & rleMarkerMask == rleMarkerBits |
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283 rleCountMask; // Mask bits for length: count = data & rleCountMask |
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284 |
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285 unsigned int |
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286 // Minimum and maximum run lengths |
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287 rleMinCountB, |
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288 rleMinCountW, |
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289 rleMaxCountB, |
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290 rleMaxCountW; |
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291 } DMCompParams; |
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292 |
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293 |
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294 // |
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295 // Global variables |
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296 // |
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297 extern DMColor dmDefaultC64Palette[C64_NCOLORS]; |
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298 extern DMC64ImageFormat dmC64ImageFormats[]; |
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299 extern const int ndmC64ImageFormats; |
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300 |
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301 |
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302 // |
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303 // Miscellaneous functions |
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304 // |
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305 void dmC64InitializeFormats(void); |
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306 int dmC64ProbeBMP(const DMGrowBuf *buf, const DMC64ImageFormat **fmt); |
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307 |
1644 | 308 char * dmC64GetImageTypeString(char *buf, const size_t len, const int type, const BOOL lng); |
1822
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309 void dmC64ImageDump(FILE *fh, const DMC64Image *img, const DMC64ImageFormat *fmt, const char *indent); |
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310 |
1457
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311 void dmSetDefaultC64Palette(DMImage *img); |
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312 BOOL dmSetMixedColorC64Palette(DMImage *img); |
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313 |
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314 BOOL dmCompareAddr16(const DMGrowBuf *buf, const size_t offs, const Uint16 addr); |
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315 int dmC64ImageGetNumBanks(const DMC64ImageFormat *fmt); |
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316 |
1644 | 317 // C64 bitmap image allocation/freeing |
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318 int dmC64MemBlockAlloc(DMC64MemBlock *blk, const size_t size); |
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319 int dmC64MemBlockCopy(DMC64MemBlock *dst, const DMC64MemBlock *src); |
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320 void dmC64MemBlockFree(DMC64MemBlock *blk); |
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321 |
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322 DMC64Image *dmC64ImageAlloc(const DMC64ImageFormat *fmt); |
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323 void dmC64ImageFree(DMC64Image *img); |
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324 |
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325 |
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326 // Encoding and decoding of formats and images |
1644 | 327 int dmC64ConvertCSDataToImage(DMImage *img, int xoffs, int yoffs, const Uint8 *inBuf, int width, int height, BOOL multicolor, int *colors); |
328 | |
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329 const char *dmC64GetOpSubjectName(const int subject); |
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330 void dmC64GetOpMemBlock(const DMC64Image *img, const int subject, const int bank, const DMC64MemBlock **blk); |
1644 | 331 int dmC64SanityCheckEncDecOp(const int i, const DMC64EncDecOp *op, const DMC64Image *img); |
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332 |
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333 size_t dmC64GetSubjectSize(const int subject, const DMC64ImageFormat *fmt); |
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334 size_t dmC64GetOpSubjectSize(const DMC64EncDecOp *op, const DMC64ImageFormat *fmt); |
1644 | 335 |
1442 | 336 |
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337 int dmC64DecodeGenericBMP(DMC64Image *img, const DMGrowBuf *buf, const DMC64ImageFormat *fmt); |
1499
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338 int dmC64EncodeGenericBMP(const BOOL allocate, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
537
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339 |
1931
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340 int dmC64ConvertBMP2Image(DMImage **pdst, const DMC64Image *src, const DMC64ImageFormat *fmt, const DMC64ImageConvSpec *spec); |
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341 int dmC64ConvertImage2BMP(DMC64Image **pdst, const DMImage *src, const DMC64ImageFormat *fmt, const DMC64ImageConvSpec *spec); |
1446 | 342 |
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343 int dmC64DecodeBMP(DMC64Image **img, const DMGrowBuf *buf, const size_t probeOffs, const size_t loadOffs, const DMC64ImageFormat **fmt, const DMC64ImageFormat *forced); |
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344 int dmC64EncodeBMP(DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
419
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345 |
1931
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346 int dmC64ConvertGenericBMP2Image(DMImage *dst, const DMC64Image *src, const DMC64ImageFormat *fmt, const DMC64ImageConvSpec *spec); |
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347 int dmC64ConvertGenericImage2BMP(DMC64Image *dst, const DMImage *src, const DMC64ImageFormat *fmt, const DMC64ImageConvSpec *spec); |
1446 | 348 |
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349 void dmGenericRLEAnalyze(const DMGrowBuf *buf, DMCompParams *cfg); |
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350 |
1713
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351 void dmSetupRLEBuffers(DMGrowBuf *dst, DMGrowBuf *src, const DMCompParams *cfg); |
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352 void dmFinishRLEBuffers(DMGrowBuf *dst, DMGrowBuf *src, const DMCompParams *cfg); |
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353 |
1713
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354 int dmGenericRLEOutputRun(DMGrowBuf *dst, const DMCompParams *cfg, const Uint8 data, const unsigned int count); |
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355 int dmEncodeGenericRLESequence(DMGrowBuf *dst, const Uint8 data, const unsigned int count, const DMCompParams *cfg); |
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356 |
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357 int dmDecodeGenericRLE(DMGrowBuf *dst, const DMGrowBuf *src, const DMCompParams *cfg); |
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358 int dmDecodeGenericRLEAlloc(DMGrowBuf *dst, const DMGrowBuf *src, const DMCompParams *cfg); |
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359 |
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360 int dmEncodeGenericRLE(DMGrowBuf *dst, const DMGrowBuf *src, const DMCompParams *cfg); |
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361 int dmEncodeGenericRLEAlloc(DMGrowBuf *dst, const DMGrowBuf *src, const DMCompParams *cfg); |
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362 |
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363 |
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364 // |
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365 // Inline helper functions for pixel format decoding |
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366 // |
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367 static inline Uint8 dmC64GetGenericSCPixel( |
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368 const DMC64Image *img, const int bmoffs, const int scroffs, |
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369 const int vshift, const int vbank, const int vbitmap, const int cbank) |
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370 { |
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371 (void) cbank; |
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372 if ((img->bitmap[vbitmap].data[bmoffs] >> vshift) & 1) |
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373 return img->screen[vbank].data[scroffs] >> 4; |
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374 else |
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375 return img->screen[vbank].data[scroffs] & 15; |
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376 } |
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377 |
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378 |
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379 static inline Uint8 dmC64GetGenericMCPixel( |
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380 const DMC64Image *img, const int bmoffs, const int scroffs, |
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381 const int vshift, const int vbank, const int vbitmap, const int cbank, const int bgcolor) |
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382 { |
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383 switch ((img->bitmap[vbitmap].data[bmoffs] >> vshift) & 3) |
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384 { |
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385 case 0: return bgcolor; |
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386 case 1: return img->screen[vbank].data[scroffs] >> 4; |
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387 case 2: return img->screen[vbank].data[scroffs] & 15; |
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388 default: return img->color[cbank].data[scroffs] & 15; |
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389 } |
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390 } |
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391 |
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392 |
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393 static inline Uint8 fmtGetGenericSCPixel( |
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394 const DMC64Image *img, const int bmoffs, const int scroffs, |
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395 const int vshift, const int vbitmap, const int rasterX, const int rasterY) |
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396 { |
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397 (void) rasterX; |
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398 (void) rasterY; |
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399 return dmC64GetGenericSCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0); |
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400 } |
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401 |
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402 |
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403 static inline Uint8 fmtGetGenericMCPixel( |
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404 const DMC64Image *img, const int bmoffs, const int scroffs, |
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405 const int vshift, const int vbitmap, const int rasterX, const int rasterY) |
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406 { |
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407 (void) rasterX; |
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408 (void) rasterY; |
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409 return dmC64GetGenericMCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0, img->bgcolor); |
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410 } |
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411 |
435 | 412 |
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413 static inline const DMC64EncDecOp * fmtGetEncDecOp(const DMC64ImageFormat *fmt, const int index) |
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414 { |
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415 return &fmt->format->encdecOps[index]; |
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416 } |
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417 |
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418 |
435 | 419 #ifdef __cplusplus |
420 } | |
421 #endif | |
422 | |
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423 #endif // LIB64GFX_H |