annotate tools/lib64gfx.h @ 1645:262300a0359b

Add helper functions dmReverse{Get,Put}Byte().
author Matti Hamalainen <ccr@tnsp.org>
date Wed, 30 May 2018 00:57:21 +0300
parents 9d9a0e852b3d
children 948d6fda722d
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1 /*
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2 * Functions for reading and converting various restricted
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3 * C64/etc and/or indexed/paletted graphics formats.
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4 * Programmed and designed by Matti 'ccr' Hamalainen
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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
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12 #include "libgfx.h"
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13 #include "dmgrowbuf.h"
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14
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15 #ifdef __cplusplus
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16 extern "C" {
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17 #endif
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18
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19
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20 // 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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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
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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
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53 // Different supported flags/modes
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54 enum
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55 {
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56 D64_FMT_HIRES = 0x0000, // Hi-res
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57 D64_FMT_MC = 0x0001, // MultiColor
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58 D64_FMT_ILACE = 0x0002, // Interlace
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59 D64_FMT_FLI = 0x0004, // FLI
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60 D64_FMT_CHAR = 0x0008, // Character mode
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61 };
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63
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64 // Different types of interlace
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65 enum
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66 {
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67 D64_ILACE_RES = 0x0001, // Interlace doubles resolution
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68 D64_ILACE_COLOR = 0x0002, // Uses color mixing
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69 };
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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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81 typedef struct
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82 {
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83 BOOL multicolor, xexpand, yexpand;
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84 int color, xc, yc;
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85 Uint8 data[C64_SPR_HEIGHT][C64_SPR_WIDTH];
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86 } DMC64Sprite;
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89 enum
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90 {
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91 DC_D020,
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92 DC_BGCOL,
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93 DC_D021,
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94 DC_D022,
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95 DC_D023,
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96 DC_D024,
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97 };
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100 typedef struct
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101 {
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102 Uint8 *data;
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103 size_t size;
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104 } DMC64MemBlock;
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105
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106
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107 typedef struct _DMC64Image
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108 {
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109 int type, // Image type (D64_FMT_*)
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110 laceType, // Interlace type (D64_ILACE_*)
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111 nbanks;
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112
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113 int width, height; // Width and height in pixels
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114 int chWidth, chHeight; // Width and height in charblocks
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115
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116 // Bitmaps, color RAM, screen, etc. blocks * nbanks
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117 // Not all of them may be allocated
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118 DMC64MemBlock
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119 *color,
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120 *bitmap,
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121 *screen,
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122 *charData;
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123
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124 // Other standard colours
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125 Uint8 d020, bgcolor, d022, d023, d024;
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126
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127 // Extra data areas used by some formats,
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128 // for example raster colours might be stored
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129 DMC64MemBlock extraData[C64_MAX_EXTRA_DATA];
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130
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131 DMC64Sprite sprites[C64_MAX_SPRITES];
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132 } DMC64Image;
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133
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134
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135 typedef Uint8 (*DMC64GetPixelFunc)(
1376
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136 const DMC64Image *img, const int bmoffs, const int scroffs,
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137 const int vshift, const int vbitmap, const int raster);
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138
407
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parents:
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139 enum
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140 {
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141 DT_COLOR_RAM,
1586
3c9e5962eca6 Rename DT_BITMAP to DT_BITMAP_RAM.
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diff changeset
142 DT_BITMAP_RAM,
407
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143 DT_SCREEN_RAM,
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diff changeset
144 DT_COLOR_REG,
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parents: 916
diff changeset
145 DT_COLOR_SET,
1373
fc5ee5b4b0e9 Improve handling of extra data.
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diff changeset
146 DT_EXTRA_DATA,
916
3985f596ece5 Cosmetics.
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parents: 915
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147
510
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148 DT_DEC_FUNCTION,
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diff changeset
149 DT_ENC_FUNCTION,
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parents: 916
diff changeset
150
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parents: 916
diff changeset
151 DT_CHAR_DATA,
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diff changeset
152 DT_CHAR_CONFIG,
925
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153
407
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154 DT_LAST,
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155 };
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156
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157
1379
1e67dd44351e Increase maximum number of enc/dec operations for C64 images.
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parents: 1378
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158 #define D64_MAX_ENCDEC_OPS 64
937
51dc33efd126 Cosmetics.
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parents: 936
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159
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160
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parents: 1482
diff changeset
161 typedef struct _DMC64ImageFormat DMC64ImageFormat;
407
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162
510
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parents: 507
diff changeset
163 typedef struct _DMC64EncDecOp
407
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164 {
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165 int type;
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diff changeset
166 size_t offs;
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parents:
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167 int bank;
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parents:
diff changeset
168 size_t size;
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bc13af8954d7 Add DMC64ImageFormat to C64 bitmap format encoding/decoding ops function parameters.
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parents: 1482
diff changeset
169 BOOL (*decFunction)(DMC64Image *img, const struct _DMC64EncDecOp *op, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt);
bc13af8954d7 Add DMC64ImageFormat to C64 bitmap format encoding/decoding ops function parameters.
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parents: 1482
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170 BOOL (*encFunction)(const struct _DMC64EncDecOp *op, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt);
510
43ea59887c69 Start work on making C64 formats encoding possible by changing DMDecodeOps
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parents: 507
diff changeset
171 } DMC64EncDecOp;
407
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172
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173
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diff changeset
174 typedef DMC64EncDecOp DMC64EncDecOpList[D64_MAX_ENCDEC_OPS];
91d1bb571fca Implement common encdec ops lists for sharing oplists between formats that
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175
91d1bb571fca Implement common encdec ops lists for sharing oplists between formats that
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parents: 1591
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176
407
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177 typedef struct _DMC64ImageFormat
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178 {
922
658bf4c452d0 Comments, cosmetics.
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parents: 921
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179 int type; // Type flags, see D64_FMT_*
658bf4c452d0 Comments, cosmetics.
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parents: 921
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180 char *fext; // Filename extension
658bf4c452d0 Comments, cosmetics.
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parents: 921
diff changeset
181 char *name; // Format description/name
658bf4c452d0 Comments, cosmetics.
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parents: 921
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182
511
4cdcaeb68b54 Collapse most of the probing functions into one generic probe, as they only
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parents: 510
diff changeset
183 size_t addr; // Loading address (0 if no loading address)
1495
acb607e2c350 Clarify a comment.
Matti Hamalainen <ccr@tnsp.org>
parents: 1494
diff changeset
184 size_t size; // Size, including loading address. Only used in probing and encoding.
924
732787cccca8 Add dimension (w/h) information fields to C64 image format struct.
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parents: 923
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185
1545
3b613fcbf3ff Improve how format read/write capabilities are marked and shown.
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diff changeset
186 int flags; // DM_FMT_* flags, see libgfx.h
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parents: 1537
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187
924
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parents: 923
diff changeset
188 int width, height; // Width and height in pixels
1482
df6dacb48970 Rename some struct members, and sanitize handling of DMC64Image allocation more.
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parents: 1467
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189 int chWidth, chHeight; // Width and height in charblocks
924
732787cccca8 Add dimension (w/h) information fields to C64 image format struct.
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parents: 923
diff changeset
190
511
4cdcaeb68b54 Collapse most of the probing functions into one generic probe, as they only
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parents: 510
diff changeset
191 int (*probe)(const Uint8 *buf, const size_t len, const struct _DMC64ImageFormat *fmt);
1442
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192
410
e4b2f689aff6 Stdint -> SDL types conversion.
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parents: 407
diff changeset
193 int (*decode)(DMC64Image *img, const Uint8 *buf, const size_t len, const struct _DMC64ImageFormat *fmt);
1465
88845f95e791 Change dmC64EncodeGenericBMP() to use DMGrowBuf, and make the necessary changes in gfxconv as well.
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parents: 1457
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194 int (*encode)(DMGrowBuf *buf, const DMC64Image *img, const struct _DMC64ImageFormat *fmt);
1442
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195
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196 int (*convertFrom)(DMImage *, const DMC64Image *, const struct _DMC64ImageFormat *fmt);
1442
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197 int (*convertTo)(DMC64Image *, const DMImage *, const struct _DMC64ImageFormat *fmt);
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198
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diff changeset
199 DMC64GetPixelFunc getPixel;
407
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200
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diff changeset
201 const DMC64EncDecOpList encdecOps, *encdecOpsRef;
407
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202 } DMC64ImageFormat;
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203
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204
1637
58ef0124394d Add some comments.
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205 //
58ef0124394d Add some comments.
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diff changeset
206 // Compression types
58ef0124394d Add some comments.
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parents: 1592
diff changeset
207 //
1573
86373ac0861a Implement another RLE variant, with different ordering of marker, count and data bytes.
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diff changeset
208 #define DM_COMP_RLE_MARKER1 1
86373ac0861a Implement another RLE variant, with different ordering of marker, count and data bytes.
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209 #define DM_COMP_RLE_MARKER2 2
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210 #define DM_COMP_RLE_MASK 3
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211
3265175b24d2 Change the passing of RLE compression/decompression parameters to be in a dedicated struct.
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parents: 1503
diff changeset
212
3265175b24d2 Change the passing of RLE compression/decompression parameters to be in a dedicated struct.
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parents: 1503
diff changeset
213 typedef struct
3265175b24d2 Change the passing of RLE compression/decompression parameters to be in a dedicated struct.
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parents: 1503
diff changeset
214 {
3265175b24d2 Change the passing of RLE compression/decompression parameters to be in a dedicated struct.
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parents: 1503
diff changeset
215 int type;
3265175b24d2 Change the passing of RLE compression/decompression parameters to be in a dedicated struct.
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diff changeset
216 Uint8 rleMarker, rleMask1, rleMask2, rleMinCount, rleMaxCount;
3265175b24d2 Change the passing of RLE compression/decompression parameters to be in a dedicated struct.
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diff changeset
217 } DMCompParams;
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parents: 1503
diff changeset
218
3265175b24d2 Change the passing of RLE compression/decompression parameters to be in a dedicated struct.
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parents: 1503
diff changeset
219
1503
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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220 //
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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221 // Global variables
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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222 //
1426
4c7b456d7f0b Rename global dmC64Palette to dmDefaultC64Palette.
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parents: 1380
diff changeset
223 extern DMColor dmDefaultC64Palette[C64_NCOLORS];
516
6f141f760c54 Constify.
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parents: 515
diff changeset
224 extern const DMC64ImageFormat dmC64ImageFormats[];
407
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225 extern const int ndmC64ImageFormats;
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226
1488
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parents: 1486
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227
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228 //
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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229 // Miscellaneous functions
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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230 //
1644
9d9a0e852b3d Reorder some functions.
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231 char * dmC64GetImageTypeString(char *buf, const size_t len, const int type, const BOOL lng);
1488
c71b6c5204af Factor the C64 bitmap image format info dump function to lib64gfx and use it from 64vw.
Matti Hamalainen <ccr@tnsp.org>
parents: 1486
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232 void dmC64ImageDump(FILE *fh, const DMC64Image *img, const DMC64ImageFormat *fmt);
1588
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parents: 1586
diff changeset
233
1457
dcff9ac95d3f Add function to set DMImage's palette to default C64 palette and use it.
Matti Hamalainen <ccr@tnsp.org>
parents: 1456
diff changeset
234 void dmSetDefaultC64Palette(DMImage *img);
1644
9d9a0e852b3d Reorder some functions.
Matti Hamalainen <ccr@tnsp.org>
parents: 1637
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235 BOOL dmCompareAddr16(const Uint8 *buf, const size_t offs, const Uint16 addr);
1588
ca087c0cc9c4 Refactor the c64 format memory handling a bit for more flexibility.
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parents: 1586
diff changeset
236 int dmC64ImageGetNumBanks(const DMC64ImageFormat *fmt);
1645
262300a0359b Add helper functions dmReverse{Get,Put}Byte().
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parents: 1644
diff changeset
237 BOOL dmReverseGetByte(const Uint8 *buf, size_t *offs, Uint8 *data);
262300a0359b Add helper functions dmReverse{Get,Put}Byte().
Matti Hamalainen <ccr@tnsp.org>
parents: 1644
diff changeset
238 BOOL dmReversePutByte(Uint8 *buf, size_t *offs, const Uint8 data);
1588
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diff changeset
239
1644
9d9a0e852b3d Reorder some functions.
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diff changeset
240 // C64 bitmap image allocation/freeing
1588
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parents: 1586
diff changeset
241 int dmC64MemBlockAlloc(DMC64MemBlock *blk, const size_t size);
ca087c0cc9c4 Refactor the c64 format memory handling a bit for more flexibility.
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parents: 1586
diff changeset
242 int dmC64MemBlockCopy(DMC64MemBlock *dst, const DMC64MemBlock *src);
ca087c0cc9c4 Refactor the c64 format memory handling a bit for more flexibility.
Matti Hamalainen <ccr@tnsp.org>
parents: 1586
diff changeset
243 void dmC64MemBlockFree(DMC64MemBlock *blk);
ca087c0cc9c4 Refactor the c64 format memory handling a bit for more flexibility.
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diff changeset
244
1378
c465860e44ed Make c64 image bank allocation dynamic.
Matti Hamalainen <ccr@tnsp.org>
parents: 1376
diff changeset
245 DMC64Image *dmC64ImageAlloc(const DMC64ImageFormat *fmt);
931
2270d7f3af77 Refactor the DMC64Image handling to be more dynamic, and start
Matti Hamalainen <ccr@tnsp.org>
parents: 926
diff changeset
246 void dmC64ImageFree(DMC64Image *img);
2270d7f3af77 Refactor the DMC64Image handling to be more dynamic, and start
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parents: 926
diff changeset
247
2270d7f3af77 Refactor the DMC64Image handling to be more dynamic, and start
Matti Hamalainen <ccr@tnsp.org>
parents: 926
diff changeset
248
1503
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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parents: 1499
diff changeset
249 // Encoding and decoding of formats and images
1644
9d9a0e852b3d Reorder some functions.
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parents: 1637
diff changeset
250 int dmC64ConvertCSDataToImage(DMImage *img, int xoffs, int yoffs, const Uint8 *inBuf, int width, int height, BOOL multicolor, int *colors);
9d9a0e852b3d Reorder some functions.
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parents: 1637
diff changeset
251
9d9a0e852b3d Reorder some functions.
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parents: 1637
diff changeset
252 int dmC64SanityCheckEncDecOp(const int i, const DMC64EncDecOp *op, const DMC64Image *img);
9d9a0e852b3d Reorder some functions.
Matti Hamalainen <ccr@tnsp.org>
parents: 1637
diff changeset
253 BOOL dmC64GetOpSize(const DMC64EncDecOp *op, const DMC64ImageFormat *fmt, size_t *size);
9d9a0e852b3d Reorder some functions.
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parents: 1637
diff changeset
254
1442
3773281491c9 Cleanups.
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diff changeset
255 int dmC64ProbeBMP(const Uint8 *buf, const size_t len, const DMC64ImageFormat **fmt);
3773281491c9 Cleanups.
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parents: 1426
diff changeset
256
410
e4b2f689aff6 Stdint -> SDL types conversion.
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parents: 407
diff changeset
257 int dmC64DecodeGenericBMP(DMC64Image *img, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt);
1499
32640e1934d5 Simplify some encoding bits.
Matti Hamalainen <ccr@tnsp.org>
parents: 1495
diff changeset
258 int dmC64EncodeGenericBMP(const BOOL allocate, DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt);
537
32d9e67da189 Rename generic probing function to match the style of other lib64gfx functions.
Matti Hamalainen <ccr@tnsp.org>
parents: 534
diff changeset
259
940
ff18d2511843 Remove the doubleMC madness completely. Should be replaced with x/y aspect
Matti Hamalainen <ccr@tnsp.org>
parents: 937
diff changeset
260 int dmC64ConvertBMP2Image(DMImage **pdst, const DMC64Image *src, const DMC64ImageFormat *fmt);
1467
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261 int dmC64ConvertImage2BMP(DMC64Image **pdst, const DMImage *src, const DMC64ImageFormat *fmt);
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262
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263 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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264 int dmC64EncodeBMP(DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt);
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265
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266 int dmC64ConvertGenericBMP2Image(DMImage *dst, const DMC64Image *src, const DMC64ImageFormat *fmt);
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267 int dmC64ConvertGenericImage2BMP(DMC64Image *dst, const DMImage *src, const DMC64ImageFormat *fmt);
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268
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269 void dmGenericRLEAnalyze(const DMGrowBuf *buf, Uint8 *rleMarker, const int rleType);
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270
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271 int dmDecodeGenericRLE(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd, const DMCompParams *cfg);
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272 int dmDecodeGenericRLEAlloc(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd, const DMCompParams *cfg);
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273
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274 int dmEncodeGenericRLE(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd, const DMCompParams *cfg);
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275 int dmEncodeGenericRLEAlloc(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd, const DMCompParams *cfg);
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276
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277
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278 //
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279 // Inline helper functions for pixel format decoding
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280 //
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281 static inline Uint8 dmC64GetGenericSCPixel(
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282 const DMC64Image *img, const int bmoffs, const int scroffs,
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283 const int vshift, const int vbank, const int vbitmap, const int cbank)
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284 {
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285 (void) cbank;
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286 if ((img->bitmap[vbitmap].data[bmoffs] >> vshift) & 1)
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287 return img->screen[vbank].data[scroffs] >> 4;
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288 else
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289 return img->screen[vbank].data[scroffs] & 15;
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290 }
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291
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292
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293 static inline Uint8 dmC64GetGenericMCPixel(
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294 const DMC64Image *img, const int bmoffs, const int scroffs,
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295 const int vshift, const int vbank, const int vbitmap, const int cbank,
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296 const int bgcolor)
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297 {
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298 switch ((img->bitmap[vbitmap].data[bmoffs] >> vshift) & 3)
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299 {
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300 case 0: return bgcolor;
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301 case 1: return img->screen[vbank].data[scroffs] >> 4;
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302 case 2: return img->screen[vbank].data[scroffs] & 15;
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303 default: return img->color[cbank].data[scroffs] & 15;
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304 }
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305 }
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306
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307
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308 static inline Uint8 fmtGetGenericSCPixel(
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309 const DMC64Image *img, const int bmoffs, const int scroffs,
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310 const int vshift, const int vbitmap, const int raster)
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311 {
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312 (void) raster;
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313 return dmC64GetGenericSCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0);
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314 }
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315
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316
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317 static inline Uint8 fmtGetGenericMCPixel(
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318 const DMC64Image *img, const int bmoffs, const int scroffs,
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319 const int vshift, const int vbitmap, const int raster)
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320 {
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321 (void) raster;
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322 return dmC64GetGenericMCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0, img->bgcolor);
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323 }
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324
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325
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326 static inline const DMC64EncDecOp * fmtGetEncDecOp(const DMC64ImageFormat *fmt, const int index)
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327 {
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328 // Ooh .. look at that beaauuuutiful deref ..
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329 return fmt->encdecOpsRef != NULL ? &(* (fmt->encdecOpsRef))[index] : &fmt->encdecOps[index];
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330 }
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331
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332
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333 #ifdef __cplusplus
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334 }
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335 #endif
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336
407
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337 #endif // LIB64GFX_H