Mercurial > hg > dmlib
annotate tools/lib64gfx.h @ 1783:1ce808599129
Add DM_RLE_ZERO_COUNT_MAX flag for RLE decoder which makes it interpret run
lengths of 0 as maximum value of the type, e.g. 256 or 65536 (latter is
probably useless.)
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Wed, 13 Jun 2018 01:34:46 +0300 |
parents | e53dc89c0e56 |
children | 52e90130453b |
rev | line source |
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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) |
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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 3 // bytes |
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32 #define C64_SPR_HEIGHT 21 // lines |
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33 #define C64_SPR_WIDTH_PX (8 * C64_SPR_WIDTH) |
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34 #define C64_SPR_SIZE ((C64_SPR_WIDTH * C64_SPR_HEIGHT) + 1) |
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35 |
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36 // Character constants |
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37 #define C64_CHR_WIDTH 1 // bytes |
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38 #define C64_CHR_HEIGHT 8 // lines |
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39 #define C64_CHR_WIDTH_PX (8 * C64_CHR_WIDTH) |
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40 #define C64_CHR_SIZE (C64_CHR_WIDTH * C64_CHR_HEIGHT) |
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41 |
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42 // Etc. |
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43 #define C64_NCOLORS 16 |
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44 #define C64_VIDBANK_SIZE (16*1024) |
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45 #define C64_MAX_SPRITES (C64_VIDBANK_SIZE / C64_SPR_SIZE) |
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46 #define C64_MAX_CHARS 256 |
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47 |
922 | 48 |
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49 #define DM_GET_ADDR_LO(addr) ((addr) & 0xff) |
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50 #define DM_GET_ADDR_HI(addr) (((addr) >> 8) & 0xff) |
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51 |
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52 |
1637 | 53 // Different supported flags/modes |
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54 enum |
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55 { |
1637 | 56 D64_FMT_HIRES = 0x0000, // Hi-res |
57 D64_FMT_MC = 0x0001, // MultiColor | |
58 D64_FMT_ILACE = 0x0002, // Interlace | |
59 D64_FMT_FLI = 0x0004, // FLI | |
60 D64_FMT_CHAR = 0x0008, // Character mode | |
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61 D64_FMT_BORDER = 0x0010, // Uses border area |
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62 }; |
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63 |
1637 | 64 |
65 // Different types of interlace | |
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66 enum |
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67 { |
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68 D64_ILACE_NONE = 0x0000, // Not set (invalid for interlaced images) |
1637 | 69 D64_ILACE_RES = 0x0001, // Interlace doubles resolution |
70 D64_ILACE_COLOR = 0x0002, // Uses color mixing | |
407
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71 }; |
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72 |
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73 |
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74 // Charmode screen memory configuration |
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75 enum |
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76 { |
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77 D64_CHCFG_SCREEN, // Use screen memory |
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78 D64_CHCFG_LINEAR = 1, // Generate linear pattern so that first line |
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79 // of chars is 0-39, second 40-79, up to 255. |
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80 }; |
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81 |
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82 |
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83 // Different enc/dec operation types (op->type) |
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84 enum |
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85 { |
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86 DO_COPY, // Perform copy between memory (from/to offset) and subject |
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87 DO_SET_MEM, // Set subject value or fill subject memory area to byte value from offset |
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88 DO_SET_OP, // Like above but value from op->offs field instead |
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89 |
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90 DO_SET_MEM_HI, // Copy one byte value like DO_SET_MEM, but high nibble only |
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91 DO_SET_MEM_LO, // Like above, but low nibble |
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92 |
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93 DO_DEC_FUNC, // Execute specified decoding function (only for decoding operations) |
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94 DO_ENC_FUNC, // Same, but for encoding |
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95 |
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96 DO_CHAR_CFG, // Set character mode configuration |
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97 |
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98 DO_LAST, // Last opcode, end processing |
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99 }; |
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100 |
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101 |
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102 // "Subjects" of operations (op->subject) |
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103 enum |
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104 { |
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105 DS_COLOR_RAM, |
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106 DS_BITMAP_RAM, |
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107 DS_SCREEN_RAM, |
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108 DS_EXTRA_DATA, |
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109 DS_CHAR_DATA, |
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110 |
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111 DS_D020, |
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112 DS_BGCOL, |
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113 DS_D021, |
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114 DS_D022, |
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115 DS_D023, |
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116 DS_D024, |
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117 }; |
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118 |
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119 |
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120 typedef struct |
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121 { |
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122 Uint8 *data; |
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123 size_t size; |
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124 } DMC64MemBlock; |
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125 |
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126 |
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127 typedef struct |
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128 { |
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129 BOOL multicolor, xexpand, yexpand; |
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130 int color, xc, yc; |
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131 Uint8 data[C64_SPR_HEIGHT][C64_SPR_WIDTH]; |
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132 } DMC64Sprite; |
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133 |
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134 |
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135 typedef struct _DMC64Image |
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136 { |
922 | 137 int type, // Image type (D64_FMT_*) |
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138 laceType, // Interlace type (D64_ILACE_*) |
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139 nbanks; |
407
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140 |
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141 int width, height; // Width and height in pixels |
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142 int chWidth, chHeight; // Width and height in charblocks |
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143 |
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144 // Bitmaps, color RAM, screen, etc. blocks * nbanks |
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145 // Not all of them may be allocated |
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146 DMC64MemBlock |
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147 *color, |
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148 *bitmap, |
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149 *screen, |
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150 *charData; |
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151 |
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152 // Other standard colours |
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153 Uint8 d020, bgcolor, d022, d023, d024; |
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154 |
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155 // Extra data areas used by some formats, |
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156 // for example raster colours might be stored |
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157 DMC64MemBlock extraData[C64_MAX_EXTRA_DATA]; |
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158 |
407
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159 DMC64Sprite sprites[C64_MAX_SPRITES]; |
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160 } DMC64Image; |
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161 |
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162 |
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163 typedef Uint8 (*DMC64GetPixelFunc)( |
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164 const DMC64Image *img, const int bmoffs, const int scroffs, |
1764
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165 const int vshift, const int vbitmap, const int rasterX, const int rasterY); |
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166 |
1379
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167 #define D64_MAX_ENCDEC_OPS 64 |
937 | 168 |
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169 |
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170 typedef struct _DMC64ImageFormat DMC64ImageFormat; |
407
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171 |
1668
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172 |
510
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173 typedef struct _DMC64EncDecOp |
407
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174 { |
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175 int type; // Operation type (DO_*) |
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176 int subject; // Operation "subject" (DS_*) |
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177 |
407
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178 size_t offs; |
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179 int bank; |
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180 size_t size; |
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181 |
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182 BOOL (*decFunction)(DMC64Image *img, const struct _DMC64EncDecOp *op, const DMGrowBuf *buf, const DMC64ImageFormat *fmt); |
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183 BOOL (*encFunction)(const struct _DMC64EncDecOp *op, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
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184 } DMC64EncDecOp; |
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185 |
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186 |
1592
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187 typedef DMC64EncDecOp DMC64EncDecOpList[D64_MAX_ENCDEC_OPS]; |
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188 |
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189 |
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190 typedef struct |
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191 { |
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192 int type; // Type flags, see D64_FMT_* |
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193 int width, height; // Width and height in pixels |
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194 int chWidth, chHeight; // Width and height in charblocks |
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195 |
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196 int (*convertFrom)(DMImage *, const DMC64Image *, const DMC64ImageFormat *fmt); |
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197 int (*convertTo)(DMC64Image *, const DMImage *, const DMC64ImageFormat *fmt); |
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198 |
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199 DMC64GetPixelFunc getPixel; |
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200 |
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201 DMC64EncDecOpList encdecOps; |
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202 } DMC64ImageCommonFormat; |
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203 |
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204 |
407
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205 typedef struct _DMC64ImageFormat |
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206 { |
922 | 207 char *fext; // Filename extension |
208 char *name; // Format description/name | |
209 | |
511
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210 size_t addr; // Loading address (0 if no loading address) |
1495 | 211 size_t size; // Size, including loading address. Only used in probing and encoding. |
924
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212 |
1545
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Improve how format read/write capabilities are marked and shown.
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213 int flags; // DM_FMT_* flags, see libgfx.h |
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214 |
1780
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215 int (*probe)(const DMGrowBuf *buf, const DMC64ImageFormat *fmt); |
1442 | 216 |
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217 int (*decode)(DMC64Image *img, const DMGrowBuf *buf, const DMC64ImageFormat *fmt); |
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218 int (*encode)(DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
1442 | 219 |
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220 DMC64ImageCommonFormat formatDef, *format; |
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221 } DMC64ImageFormat; |
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222 |
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223 |
1637 | 224 // |
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225 // Compression types and flags |
1637 | 226 // |
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227 enum |
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228 { |
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229 DM_COMP_RLE_MARKER = 1, // RLE with a separate marker byte |
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230 DM_COMP_RLE_MASK = 2, // RLE that has marker bits and lower part acts as run length |
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231 }; |
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232 |
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233 enum |
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234 { |
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235 DM_RLE_BYTE_RUNS = 0x0001, // Uses one-byte run lengths |
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236 DM_RLE_WORD_RUNS = 0x0002, // Uses two-byte (word) run lengths |
1650
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237 DM_RLE_RUNS_MASK = 0x000f, |
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238 |
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239 DM_RLE_ORDER_1 = 0x0000, // Order: <marker>, <count/run length>, <data> |
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240 DM_RLE_ORDER_2 = 0x0010, // Order: <marker>, <data>, <count/run length> |
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241 DM_RLE_ORDER_MASK = 0x00f0, |
1707
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242 |
1709
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243 DM_RLE_BACKWARDS_INPUT = 0x0100, |
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244 DM_RLE_BACKWARDS_OUTPUT = 0x0200, |
1783
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Add DM_RLE_ZERO_COUNT_MAX flag for RLE decoder which makes it interpret run
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245 DM_RLE_ZERO_COUNT_MAX = 0x0400, |
1720
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246 |
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247 DM_OUT_CROP_NONE = 0x0000, |
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248 DM_OUT_CROP_START = 0x1000, |
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249 DM_OUT_CROP_END = 0x2000, |
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250 DM_OUT_CROP_MASK = 0xf000, |
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251 }; |
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252 |
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253 |
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254 typedef struct |
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255 { |
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256 char *func; |
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257 int type; |
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258 int flags; |
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259 size_t cropOutLen; |
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260 |
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261 Uint8 |
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262 // DM_COMP_RLE_MARKER mode |
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263 rleMarkerB, // Marker byte for byte length runs (if DM_RLE_BYTE_RUNS used) |
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264 rleMarkerW, // Marker byte for word length runs (if DM_RLE_WORD_RUNS used) |
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265 |
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266 // DM_COMP_RLE_MASK mode |
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267 rleMarkerBits, |
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268 rleMarkerMask, // Mask bits for marker: data & rleMarkerMask == rleMarkerBits |
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269 rleCountMask; // Mask bits for length: count = data & rleCountMask |
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270 |
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271 unsigned int |
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272 // Minimum and maximum run lengths |
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273 rleMinCountB, |
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274 rleMinCountW, |
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275 rleMaxCountB, |
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276 rleMaxCountW; |
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277 } DMCompParams; |
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278 |
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279 |
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280 // |
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281 // Global variables |
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282 // |
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283 extern DMColor dmDefaultC64Palette[C64_NCOLORS]; |
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284 extern DMC64ImageFormat dmC64ImageFormats[]; |
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285 extern const int ndmC64ImageFormats; |
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286 |
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287 |
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288 // |
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289 // Miscellaneous functions |
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290 // |
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291 void dmC64InitializeFormats(void); |
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292 int dmC64ProbeBMP(const DMGrowBuf *buf, const DMC64ImageFormat **fmt); |
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293 |
1644 | 294 char * dmC64GetImageTypeString(char *buf, const size_t len, const int type, const BOOL lng); |
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295 void dmC64ImageDump(FILE *fh, const DMC64Image *img, const DMC64ImageFormat *fmt); |
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296 |
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297 void dmSetDefaultC64Palette(DMImage *img); |
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298 BOOL dmSetMixedColorC64Palette(DMImage *img); |
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299 |
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300 BOOL dmCompareAddr16(const DMGrowBuf *buf, const size_t offs, const Uint16 addr); |
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301 int dmC64ImageGetNumBanks(const DMC64ImageFormat *fmt); |
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302 |
1644 | 303 // C64 bitmap image allocation/freeing |
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304 int dmC64MemBlockAlloc(DMC64MemBlock *blk, const size_t size); |
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305 int dmC64MemBlockCopy(DMC64MemBlock *dst, const DMC64MemBlock *src); |
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306 void dmC64MemBlockFree(DMC64MemBlock *blk); |
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307 |
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308 DMC64Image *dmC64ImageAlloc(const DMC64ImageFormat *fmt); |
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309 void dmC64ImageFree(DMC64Image *img); |
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310 |
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311 |
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312 // Encoding and decoding of formats and images |
1644 | 313 int dmC64ConvertCSDataToImage(DMImage *img, int xoffs, int yoffs, const Uint8 *inBuf, int width, int height, BOOL multicolor, int *colors); |
314 | |
315 int dmC64SanityCheckEncDecOp(const int i, const DMC64EncDecOp *op, const DMC64Image *img); | |
316 BOOL dmC64GetOpSize(const DMC64EncDecOp *op, const DMC64ImageFormat *fmt, size_t *size); | |
317 | |
1442 | 318 |
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319 int dmC64DecodeGenericBMP(DMC64Image *img, const DMGrowBuf *buf, const DMC64ImageFormat *fmt); |
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320 int dmC64EncodeGenericBMP(const BOOL allocate, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
537
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321 |
940
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322 int dmC64ConvertBMP2Image(DMImage **pdst, const DMC64Image *src, const DMC64ImageFormat *fmt); |
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323 int dmC64ConvertImage2BMP(DMC64Image **pdst, const DMImage *src, const DMC64ImageFormat *fmt); |
1446 | 324 |
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325 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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326 int dmC64EncodeBMP(DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
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327 |
1446 | 328 int dmC64ConvertGenericBMP2Image(DMImage *dst, const DMC64Image *src, const DMC64ImageFormat *fmt); |
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329 int dmC64ConvertGenericImage2BMP(DMC64Image *dst, const DMImage *src, const DMC64ImageFormat *fmt); |
1446 | 330 |
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331 void dmGenericRLEAnalyze(const DMGrowBuf *buf, DMCompParams *cfg); |
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332 |
1713
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333 void dmSetupRLEBuffers(DMGrowBuf *dst, DMGrowBuf *src, const DMCompParams *cfg); |
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334 void dmFinishRLEBuffers(DMGrowBuf *dst, DMGrowBuf *src, const DMCompParams *cfg); |
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335 |
1713
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336 int dmGenericRLEOutputRun(DMGrowBuf *dst, const DMCompParams *cfg, const Uint8 data, const unsigned int count); |
1719
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337 int dmEncodeGenericRLESequence(DMGrowBuf *dst, const Uint8 data, const unsigned int count, const DMCompParams *cfg); |
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338 |
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339 int dmDecodeGenericRLE(DMGrowBuf *dst, const DMGrowBuf *src, const DMCompParams *cfg); |
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340 int dmDecodeGenericRLEAlloc(DMGrowBuf *dst, const DMGrowBuf *src, const DMCompParams *cfg); |
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341 |
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342 int dmEncodeGenericRLE(DMGrowBuf *dst, const DMGrowBuf *src, const DMCompParams *cfg); |
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343 int dmEncodeGenericRLEAlloc(DMGrowBuf *dst, const DMGrowBuf *src, const DMCompParams *cfg); |
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344 |
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345 |
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346 // |
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347 // Inline helper functions for pixel format decoding |
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348 // |
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349 static inline Uint8 dmC64GetGenericSCPixel( |
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350 const DMC64Image *img, const int bmoffs, const int scroffs, |
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351 const int vshift, const int vbank, const int vbitmap, const int cbank) |
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352 { |
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353 (void) cbank; |
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354 if ((img->bitmap[vbitmap].data[bmoffs] >> vshift) & 1) |
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355 return img->screen[vbank].data[scroffs] >> 4; |
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356 else |
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357 return img->screen[vbank].data[scroffs] & 15; |
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358 } |
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359 |
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360 |
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361 static inline Uint8 dmC64GetGenericMCPixel( |
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362 const DMC64Image *img, const int bmoffs, const int scroffs, |
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363 const int vshift, const int vbank, const int vbitmap, const int cbank, const int bgcolor) |
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364 { |
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365 switch ((img->bitmap[vbitmap].data[bmoffs] >> vshift) & 3) |
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366 { |
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367 case 0: return bgcolor; |
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368 case 1: return img->screen[vbank].data[scroffs] >> 4; |
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369 case 2: return img->screen[vbank].data[scroffs] & 15; |
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370 default: return img->color[cbank].data[scroffs] & 15; |
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371 } |
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372 } |
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373 |
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374 |
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375 static inline Uint8 fmtGetGenericSCPixel( |
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376 const DMC64Image *img, const int bmoffs, const int scroffs, |
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377 const int vshift, const int vbitmap, const int rasterX, const int rasterY) |
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378 { |
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379 (void) rasterX; |
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380 (void) rasterY; |
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381 return dmC64GetGenericSCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0); |
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382 } |
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383 |
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384 |
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385 static inline Uint8 fmtGetGenericMCPixel( |
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386 const DMC64Image *img, const int bmoffs, const int scroffs, |
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387 const int vshift, const int vbitmap, const int rasterX, const int rasterY) |
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388 { |
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389 (void) rasterX; |
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390 (void) rasterY; |
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391 return dmC64GetGenericMCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0, img->bgcolor); |
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392 } |
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393 |
435 | 394 |
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395 static inline const DMC64EncDecOp * fmtGetEncDecOp(const DMC64ImageFormat *fmt, const int index) |
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396 { |
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397 return &fmt->format->encdecOps[index]; |
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398 } |
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399 |
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400 |
435 | 401 #ifdef __cplusplus |
402 } | |
403 #endif | |
404 | |
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405 #endif // LIB64GFX_H |