Mercurial > hg > dmlib
annotate tools/lib64gfx.h @ 1505:3265175b24d2
Change the passing of RLE compression/decompression parameters to be in a dedicated struct.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Fri, 11 May 2018 20:18:14 +0300 |
parents | c7b9ef56319b |
children | 776aa43b2c57 |
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) |
926 | 25 #define C64_SCR_COLOR_SIZE (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT) |
26 #define C64_SCR_SCREEN_SIZE (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT) | |
923 | 27 #define C64_SCR_BITMAP_SIZE ((C64_SCR_WIDTH * C64_SCR_HEIGHT)/8) |
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28 #define C64_MAX_EXTRA_DATA 64 |
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29 |
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30 // C64 video screen pixel aspect ratio on PAL |
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31 #define C64_SCR_PAR_XY (0.9365f) |
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32 |
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33 // Sprite constants |
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34 #define C64_SPR_WIDTH 3 // bytes |
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35 #define C64_SPR_HEIGHT 21 // lines |
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36 #define C64_SPR_WIDTH_PX (8 * C64_SPR_WIDTH) |
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37 #define C64_SPR_SIZE ((C64_SPR_WIDTH * C64_SPR_HEIGHT) + 1) |
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38 |
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39 // Character constants |
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40 #define C64_CHR_WIDTH 1 // bytes |
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41 #define C64_CHR_HEIGHT 8 // lines |
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42 #define C64_CHR_WIDTH_PX (8 * C64_CHR_WIDTH) |
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43 #define C64_CHR_SIZE (C64_CHR_WIDTH * C64_CHR_HEIGHT) |
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44 |
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45 // Etc. |
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46 #define C64_RAM_SIZE (64*1024) |
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47 #define C64_NCOLORS 16 |
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48 #define C64_MAX_COLORS 16 |
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49 #define C64_VIDBANK_SIZE (16*1024) |
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50 #define C64_MAX_SPRITES (C64_VIDBANK_SIZE / C64_SPR_SIZE) |
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51 #define C64_MAX_CHARS 256 |
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52 |
922 | 53 |
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54 #define DM_GET_ADDR_LO(addr) ((addr) & 0xff) |
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55 #define DM_GET_ADDR_HI(addr) (((addr) >> 8) & 0xff) |
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56 |
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57 |
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58 // Different supported C64 bitmap "modes" |
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59 enum |
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60 { |
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61 D64_FMT_HIRES = 0x0000, |
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62 D64_FMT_MC = 0x0001, |
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63 D64_FMT_ILACE = 0x0002, |
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64 D64_FMT_FLI = 0x0004, |
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65 D64_FMT_CHAR = 0x0008, |
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66 |
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67 D64_FMT_MODE_MASK = 0x000f, |
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68 |
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69 }; |
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70 |
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71 enum |
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72 { |
1380 | 73 D64_ILACE_RES, |
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74 D64_ILACE_COLOR, |
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75 }; |
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76 |
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77 |
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78 // Charmode screen memory configuration |
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79 enum |
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80 { |
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81 D64_CHCFG_SCREEN, // Use screen memory |
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82 D64_CHCFG_LINEAR = 1, // Generate linear pattern so that first line |
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83 // of chars is 0-39, second 40-79, up to 255. |
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84 }; |
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85 |
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86 |
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87 typedef struct |
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88 { |
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89 BOOL multicolor, xexpand, yexpand; |
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90 int color, xc, yc; |
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91 Uint8 data[C64_SPR_HEIGHT][C64_SPR_WIDTH]; |
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92 } DMC64Sprite; |
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93 |
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94 |
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95 enum |
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96 { |
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97 DC_D020, |
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98 DC_BGCOL, |
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99 DC_D021, |
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100 DC_D022, |
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101 DC_D023, |
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102 DC_D024, |
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103 }; |
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104 |
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105 |
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106 typedef struct _DMC64Image |
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107 { |
922 | 108 int type, // Image type (D64_FMT_*) |
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109 laceType, // Interlace type (D64_ILACE_*) |
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110 nbanks; |
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111 |
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112 int width, height; // Width and height in pixels |
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113 int chWidth, chHeight; // Width and height in charblocks |
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114 |
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115 size_t |
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116 screenSize, |
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117 bitmapSize, |
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118 charmemSize; |
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119 |
915 | 120 Uint8 |
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121 **color, |
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122 **bitmap, |
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123 **screen, |
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124 **charmem, |
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125 *extraData[C64_MAX_EXTRA_DATA], |
915 | 126 d020, bgcolor, d022, d023, d024; |
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127 |
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128 size_t extraDataSizes[C64_MAX_EXTRA_DATA]; |
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129 |
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130 DMC64Sprite sprites[C64_MAX_SPRITES]; |
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131 } DMC64Image; |
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132 |
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133 |
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134 typedef Uint8 (*DMC64GetPixelFunc)( |
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135 const DMC64Image *img, const int bmoffs, const int scroffs, |
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136 const int vshift, const int vbitmap, const int raster); |
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137 |
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138 enum |
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139 { |
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140 DT_COLOR_RAM, |
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141 DT_BITMAP, |
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142 DT_SCREEN_RAM, |
917
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143 DT_COLOR_REG, |
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144 DT_COLOR_SET, |
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145 DT_EXTRA_DATA, |
916 | 146 |
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147 DT_DEC_FUNCTION, |
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148 DT_ENC_FUNCTION, |
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149 |
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150 DT_CHAR_DATA, |
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151 DT_CHAR_CONFIG, |
925 | 152 |
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153 DT_LAST, |
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154 }; |
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155 |
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156 |
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157 #define D64_MAX_ENCDEC_OPS 64 |
937 | 158 |
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159 |
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160 typedef struct _DMC64ImageFormat DMC64ImageFormat; |
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161 |
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162 typedef struct _DMC64EncDecOp |
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163 { |
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164 int type; |
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165 size_t offs; |
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166 int bank; |
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167 size_t size; |
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168 BOOL (*decFunction)(DMC64Image *img, const struct _DMC64EncDecOp *op, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt); |
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169 BOOL (*encFunction)(const struct _DMC64EncDecOp *op, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
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170 } DMC64EncDecOp; |
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171 |
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172 |
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173 typedef struct _DMC64ImageFormat |
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174 { |
922 | 175 int type; // Type flags, see D64_FMT_* |
176 char *fext; // Filename extension | |
177 char *name; // Format description/name | |
178 | |
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179 size_t addr; // Loading address (0 if no loading address) |
1495 | 180 size_t size; // Size, including loading address. Only used in probing and encoding. |
924
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181 |
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182 int width, height; // Width and height in pixels |
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183 int chWidth, chHeight; // Width and height in charblocks |
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184 |
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185 int (*probe)(const Uint8 *buf, const size_t len, const struct _DMC64ImageFormat *fmt); |
1442 | 186 |
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187 int (*decode)(DMC64Image *img, const Uint8 *buf, const size_t len, const struct _DMC64ImageFormat *fmt); |
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188 int (*encode)(DMGrowBuf *buf, const DMC64Image *img, const struct _DMC64ImageFormat *fmt); |
1442 | 189 |
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190 int (*convertFrom)(DMImage *, const DMC64Image *, const struct _DMC64ImageFormat *fmt); |
1442 | 191 int (*convertTo)(DMC64Image *, const DMImage *, const struct _DMC64ImageFormat *fmt); |
192 | |
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193 DMC64GetPixelFunc getPixel; |
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194 |
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195 DMC64EncDecOp encdecOps[D64_MAX_ENCDEC_OPS]; |
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196 } DMC64ImageFormat; |
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197 |
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198 |
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199 #define DM_COMP_RLE_MARKER 1 |
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200 #define DM_COMP_RLE_MASK 2 |
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201 |
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202 |
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203 typedef struct |
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204 { |
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205 int type; |
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206 Uint8 rleMarker, rleMask1, rleMask2, rleMinCount, rleMaxCount; |
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207 } DMCompParams; |
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208 |
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209 |
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210 // |
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211 // Global variables |
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212 // |
1426
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213 extern DMColor dmDefaultC64Palette[C64_NCOLORS]; |
516 | 214 extern const DMC64ImageFormat dmC64ImageFormats[]; |
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215 extern const int ndmC64ImageFormats; |
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216 |
1488
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217 |
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218 // |
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219 // Miscellaneous functions |
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220 // |
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221 void dmC64ImageDump(FILE *fh, const DMC64Image *img, const DMC64ImageFormat *fmt); |
1457
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222 void dmSetDefaultC64Palette(DMImage *img); |
1494
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223 char * dmC64GetImageTypeString(char *buf, const size_t len, const int type, const BOOL lng); |
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224 int dmC64ConvertCSDataToImage(DMImage *img, int xoffs, int yoffs, const Uint8 *inBuf, int width, int height, BOOL multicolor, int *colors); |
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225 int dmC64ImageGetNumBanks(const DMC64ImageFormat *fmt); |
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226 BOOL dmCompareAddr16(const Uint8 *buf, const size_t offs, const Uint16 addr); |
1457
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227 |
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228 |
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229 // C64 bitmap image allocation/freeing |
1378
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230 DMC64Image *dmC64ImageAlloc(const DMC64ImageFormat *fmt); |
931
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231 void dmC64ImageFree(DMC64Image *img); |
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232 |
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233 |
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234 // Encoding and decoding of formats and images |
1442 | 235 int dmC64ProbeBMP(const Uint8 *buf, const size_t len, const DMC64ImageFormat **fmt); |
236 | |
410
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237 int dmC64DecodeGenericBMP(DMC64Image *img, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt); |
1499
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238 int dmC64EncodeGenericBMP(const BOOL allocate, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
537
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239 |
940
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240 int dmC64ConvertBMP2Image(DMImage **pdst, const DMC64Image *src, const DMC64ImageFormat *fmt); |
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241 int dmC64ConvertImage2BMP(DMC64Image **pdst, const DMImage *src, const DMC64ImageFormat *fmt); |
1446 | 242 |
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243 int dmC64DecodeBMP(DMC64Image **img, const Uint8 *buf, const size_t len, const size_t probeOffs, const size_t loadOffs, const DMC64ImageFormat **fmt, const DMC64ImageFormat *forced); |
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244 int dmC64EncodeBMP(DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt); |
419
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245 |
1446 | 246 int dmC64ConvertGenericBMP2Image(DMImage *dst, const DMC64Image *src, const DMC64ImageFormat *fmt); |
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247 int dmC64ConvertGenericImage2BMP(DMC64Image *dst, const DMImage *src, const DMC64ImageFormat *fmt); |
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249 void dmGenericRLEAnalyze(const DMGrowBuf *buf, Uint8 *rleMarker, const int rleType); |
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250 |
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251 int dmDecodeGenericRLE(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd, const DMCompParams *cfg); |
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252 int dmDecodeGenericRLEAlloc(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd, const DMCompParams *cfg); |
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253 |
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254 int dmEncodeGenericRLE(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd, const DMCompParams *cfg); |
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255 int dmEncodeGenericRLEAlloc(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd, const DMCompParams *cfg); |
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256 |
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257 |
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258 // |
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259 // Inline helper functions for pixel format decoding |
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260 // |
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261 static inline Uint8 dmC64GetGenericSCPixel( |
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262 const DMC64Image *img, const int bmoffs, const int scroffs, |
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263 const int vshift, const int vbank, const int vbitmap, const int cbank) |
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264 { |
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265 (void) cbank; |
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266 if ((img->bitmap[vbitmap][bmoffs] >> vshift) & 1) |
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267 return img->screen[vbank][scroffs] >> 4; |
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268 else |
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269 return img->screen[vbank][scroffs] & 15; |
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270 } |
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271 |
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272 |
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273 static inline Uint8 dmC64GetGenericMCPixel( |
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274 const DMC64Image *img, const int bmoffs, const int scroffs, |
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275 const int vshift, const int vbank, const int vbitmap, const int cbank) |
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276 { |
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277 switch ((img->bitmap[vbitmap][bmoffs] >> vshift) & 3) |
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278 { |
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279 case 0: return img->bgcolor; break; |
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280 case 1: return img->screen[vbank][scroffs] >> 4; break; |
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281 case 2: return img->screen[vbank][scroffs] & 15; break; |
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282 default: return img->color[cbank][scroffs] & 15; break; |
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283 } |
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284 } |
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285 |
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286 |
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287 static inline Uint8 fmtGetGenericSCPixel( |
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288 const DMC64Image *img, const int bmoffs, const int scroffs, |
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289 const int vshift, const int vbitmap, const int raster) |
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290 { |
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291 (void) raster; |
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292 return dmC64GetGenericSCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0); |
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293 } |
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294 |
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295 |
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296 static inline Uint8 fmtGetGenericMCPixel( |
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297 const DMC64Image *img, const int bmoffs, const int scroffs, |
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298 const int vshift, const int vbitmap, const int raster) |
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299 { |
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300 (void) raster; |
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301 return dmC64GetGenericMCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0); |
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302 } |
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303 |
435 | 304 |
305 #ifdef __cplusplus | |
306 } | |
307 #endif | |
308 | |
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309 #endif // LIB64GFX_H |