annotate tools/lib64gfx.h @ 1503:c7b9ef56319b

Factor all the c64 file format specific things into lib64fmt.c
author Matti Hamalainen <ccr@tnsp.org>
date Fri, 11 May 2018 07:41:55 +0300
parents 32640e1934d5
children 3265175b24d2
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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_SCR_COLOR_SIZE (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT)
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26 #define C64_SCR_SCREEN_SIZE (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT)
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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
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53
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54 #define DM_RLE_MARKER 1
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55 #define DM_RLE_MASK 2
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56
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57
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58 #define DM_GET_ADDR_LO(addr) ((addr) & 0xff)
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59 #define DM_GET_ADDR_HI(addr) (((addr) >> 8) & 0xff)
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61
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62 // Different supported C64 bitmap "modes"
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63 enum
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64 {
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65 D64_FMT_HIRES = 0x0000,
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66 D64_FMT_MC = 0x0001,
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67 D64_FMT_ILACE = 0x0002,
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68 D64_FMT_FLI = 0x0004,
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69 D64_FMT_CHAR = 0x0008,
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71 D64_FMT_MODE_MASK = 0x000f,
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72
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73 };
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75 enum
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76 {
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77 D64_ILACE_RES,
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78 D64_ILACE_COLOR,
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79 };
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80
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81
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82 // Charmode screen memory configuration
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83 enum
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84 {
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85 D64_CHCFG_SCREEN, // Use screen memory
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86 D64_CHCFG_LINEAR = 1, // Generate linear pattern so that first line
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87 // of chars is 0-39, second 40-79, up to 255.
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88 };
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91 typedef struct
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92 {
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93 BOOL multicolor, xexpand, yexpand;
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94 int color, xc, yc;
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95 Uint8 data[C64_SPR_HEIGHT][C64_SPR_WIDTH];
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96 } DMC64Sprite;
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97
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99 enum
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100 {
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101 DC_D020,
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102 DC_BGCOL,
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103 DC_D021,
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104 DC_D022,
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105 DC_D023,
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106 DC_D024,
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107 };
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108
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109
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110 typedef struct _DMC64Image
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111 {
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112 int type, // Image type (D64_FMT_*)
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113 laceType, // Interlace type (D64_ILACE_*)
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114 nbanks;
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115
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116 int width, height; // Width and height in pixels
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117 int chWidth, chHeight; // Width and height in charblocks
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118
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119 size_t
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120 screenSize,
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121 bitmapSize,
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122 charmemSize;
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123
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124 Uint8
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125 **color,
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126 **bitmap,
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127 **screen,
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128 **charmem,
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129 *extraData[C64_MAX_EXTRA_DATA],
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130 d020, bgcolor, d022, d023, d024;
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131
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132 size_t extraDataSizes[C64_MAX_EXTRA_DATA];
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133
407
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134 DMC64Sprite sprites[C64_MAX_SPRITES];
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135 } DMC64Image;
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136
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137
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138 typedef Uint8 (*DMC64GetPixelFunc)(
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139 const DMC64Image *img, const int bmoffs, const int scroffs,
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140 const int vshift, const int vbitmap, const int raster);
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141
407
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142 enum
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143 {
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144 DT_COLOR_RAM,
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145 DT_BITMAP,
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146 DT_SCREEN_RAM,
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diff changeset
147 DT_COLOR_REG,
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diff changeset
148 DT_COLOR_SET,
1373
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diff changeset
149 DT_EXTRA_DATA,
916
3985f596ece5 Cosmetics.
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diff changeset
150
510
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diff changeset
151 DT_DEC_FUNCTION,
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diff changeset
152 DT_ENC_FUNCTION,
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diff changeset
153
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diff changeset
154 DT_CHAR_DATA,
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diff changeset
155 DT_CHAR_CONFIG,
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156
407
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157 DT_LAST,
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158 };
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159
1379
1e67dd44351e Increase maximum number of enc/dec operations for C64 images.
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160 #define D64_MAX_ENCDEC_OPS 64
937
51dc33efd126 Cosmetics.
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161
1486
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diff changeset
162 typedef struct _DMC64ImageFormat DMC64ImageFormat;
407
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163
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43ea59887c69 Start work on making C64 formats encoding possible by changing DMDecodeOps
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diff changeset
164 typedef struct _DMC64EncDecOp
407
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165 {
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166 int type;
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167 size_t offs;
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168 int bank;
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169 size_t size;
1486
bc13af8954d7 Add DMC64ImageFormat to C64 bitmap format encoding/decoding ops function parameters.
Matti Hamalainen <ccr@tnsp.org>
parents: 1482
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170 BOOL (*decFunction)(DMC64Image *img, const struct _DMC64EncDecOp *op, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt);
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parents: 1482
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171 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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172 } DMC64EncDecOp;
407
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173
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174
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175 typedef struct _DMC64ImageFormat
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176 {
922
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177 int type; // Type flags, see D64_FMT_*
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178 char *fext; // Filename extension
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parents: 921
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179 char *name; // Format description/name
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180
511
4cdcaeb68b54 Collapse most of the probing functions into one generic probe, as they only
Matti Hamalainen <ccr@tnsp.org>
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181 size_t addr; // Loading address (0 if no loading address)
1495
acb607e2c350 Clarify a comment.
Matti Hamalainen <ccr@tnsp.org>
parents: 1494
diff changeset
182 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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183
732787cccca8 Add dimension (w/h) information fields to C64 image format struct.
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parents: 923
diff changeset
184 int width, height; // Width and height in pixels
1482
df6dacb48970 Rename some struct members, and sanitize handling of DMC64Image allocation more.
Matti Hamalainen <ccr@tnsp.org>
parents: 1467
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185 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
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186
511
4cdcaeb68b54 Collapse most of the probing functions into one generic probe, as they only
Matti Hamalainen <ccr@tnsp.org>
parents: 510
diff changeset
187 int (*probe)(const Uint8 *buf, const size_t len, const struct _DMC64ImageFormat *fmt);
1442
3773281491c9 Cleanups.
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188
410
e4b2f689aff6 Stdint -> SDL types conversion.
Matti Hamalainen <ccr@tnsp.org>
parents: 407
diff changeset
189 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.
Matti Hamalainen <ccr@tnsp.org>
parents: 1457
diff changeset
190 int (*encode)(DMGrowBuf *buf, const DMC64Image *img, const struct _DMC64ImageFormat *fmt);
1442
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191
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Matti Hamalainen <ccr@tnsp.org>
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diff changeset
192 int (*convertFrom)(DMImage *, const DMC64Image *, const struct _DMC64ImageFormat *fmt);
1442
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193 int (*convertTo)(DMC64Image *, const DMImage *, const struct _DMC64ImageFormat *fmt);
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194
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diff changeset
195 DMC64GetPixelFunc getPixel;
407
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196
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diff changeset
197 DMC64EncDecOp encdecOps[D64_MAX_ENCDEC_OPS];
407
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198 } DMC64ImageFormat;
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199
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200
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201 //
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202 // Global variables
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203 //
1426
4c7b456d7f0b Rename global dmC64Palette to dmDefaultC64Palette.
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parents: 1380
diff changeset
204 extern DMColor dmDefaultC64Palette[C64_NCOLORS];
516
6f141f760c54 Constify.
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parents: 515
diff changeset
205 extern const DMC64ImageFormat dmC64ImageFormats[];
407
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206 extern const int ndmC64ImageFormats;
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207
1488
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208
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209 //
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210 // Miscellaneous functions
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211 //
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
diff changeset
212 void dmC64ImageDump(FILE *fh, const DMC64Image *img, const DMC64ImageFormat *fmt);
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
213 void dmSetDefaultC64Palette(DMImage *img);
1494
3b220604ae3c Add short format attribute names to dmC64GetImageTypeString().
Matti Hamalainen <ccr@tnsp.org>
parents: 1489
diff changeset
214 char * dmC64GetImageTypeString(char *buf, const size_t len, const int type, const BOOL lng);
1503
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
215 int dmC64ConvertCSDataToImage(DMImage *img, int xoffs, int yoffs, const Uint8 *inBuf, int width, int height, BOOL multicolor, int *colors);
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Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
216 int dmC64ImageGetNumBanks(const DMC64ImageFormat *fmt);
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
217 BOOL dmCompareAddr16(const Uint8 *buf, const size_t offs, const Uint16 addr);
1457
dcff9ac95d3f Add function to set DMImage's palette to default C64 palette and use it.
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parents: 1456
diff changeset
218
407
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diff changeset
219
1503
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diff changeset
220 // C64 bitmap image allocation/freeing
1378
c465860e44ed Make c64 image bank allocation dynamic.
Matti Hamalainen <ccr@tnsp.org>
parents: 1376
diff changeset
221 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
222 void dmC64ImageFree(DMC64Image *img);
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diff changeset
223
2270d7f3af77 Refactor the DMC64Image handling to be more dynamic, and start
Matti Hamalainen <ccr@tnsp.org>
parents: 926
diff changeset
224
1503
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225 // Encoding and decoding of formats and images
1442
3773281491c9 Cleanups.
Matti Hamalainen <ccr@tnsp.org>
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diff changeset
226 int dmC64ProbeBMP(const Uint8 *buf, const size_t len, const DMC64ImageFormat **fmt);
3773281491c9 Cleanups.
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227
410
e4b2f689aff6 Stdint -> SDL types conversion.
Matti Hamalainen <ccr@tnsp.org>
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diff changeset
228 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
229 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
230
940
ff18d2511843 Remove the doubleMC madness completely. Should be replaced with x/y aspect
Matti Hamalainen <ccr@tnsp.org>
parents: 937
diff changeset
231 int dmC64ConvertBMP2Image(DMImage **pdst, const DMC64Image *src, const DMC64ImageFormat *fmt);
1467
32203356c652 Add some new functions that are mostly just stubs and not working tho.
Matti Hamalainen <ccr@tnsp.org>
parents: 1465
diff changeset
232 int dmC64ConvertImage2BMP(DMC64Image **pdst, const DMImage *src, const DMC64ImageFormat *fmt);
1446
948b32bd67ef Cosmetics.
Matti Hamalainen <ccr@tnsp.org>
parents: 1442
diff changeset
233
931
2270d7f3af77 Refactor the DMC64Image handling to be more dynamic, and start
Matti Hamalainen <ccr@tnsp.org>
parents: 926
diff changeset
234 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);
1467
32203356c652 Add some new functions that are mostly just stubs and not working tho.
Matti Hamalainen <ccr@tnsp.org>
parents: 1465
diff changeset
235 int dmC64EncodeBMP(DMGrowBuf *buf, const DMC64Image *img, const DMC64ImageFormat *fmt);
419
936bc27a79d6 Modularize some functions to lib64gfx, fix bitmap -> image conversion,
Matti Hamalainen <ccr@tnsp.org>
parents: 418
diff changeset
236
1446
948b32bd67ef Cosmetics.
Matti Hamalainen <ccr@tnsp.org>
parents: 1442
diff changeset
237 int dmC64ConvertGenericBMP2Image(DMImage *dst, const DMC64Image *src, const DMC64ImageFormat *fmt);
1467
32203356c652 Add some new functions that are mostly just stubs and not working tho.
Matti Hamalainen <ccr@tnsp.org>
parents: 1465
diff changeset
238 int dmC64ConvertGenericImage2BMP(DMC64Image *dst, const DMImage *src, const DMC64ImageFormat *fmt);
1446
948b32bd67ef Cosmetics.
Matti Hamalainen <ccr@tnsp.org>
parents: 1442
diff changeset
239
1503
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
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diff changeset
240 void dmGenericRLEAnalyze(const DMGrowBuf *buf, Uint8 *rleMarker, const int rleType);
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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parents: 1499
diff changeset
241
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
242 int dmDecodeGenericRLE(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd,
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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parents: 1499
diff changeset
243 const Uint8 rleMarker, const Uint8 rleMask1, const Uint8 rleMask2, const int rleType);
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Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
244 int dmDecodeGenericRLEAlloc(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd,
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
245 const Uint8 rleMarker, const Uint8 rleMask1, const Uint8 rleMask2, const int rleType);
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Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
246
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
247 int dmEncodeGenericRLE(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd,
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
248 const Uint8 rleMarker, const Uint8 rleMinCount, const Uint8 rleMaxCount, const int rleType);
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
249 int dmEncodeGenericRLEAlloc(DMGrowBuf *dst, const Uint8 *src, const Uint8 *srcEnd,
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
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parents: 1499
diff changeset
250 const Uint8 rleMarker, const Uint8 rleMinCount, const Uint8 rleMaxCount, const int rleType);
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
251
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
252
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
253 //
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
parents: 1499
diff changeset
254 // Inline helper functions for pixel format decoding
c7b9ef56319b Factor all the c64 file format specific things into lib64fmt.c
Matti Hamalainen <ccr@tnsp.org>
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255 //
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256 static inline Uint8 dmC64GetGenericSCPixel(
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257 const DMC64Image *img, const int bmoffs, const int scroffs,
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258 const int vshift, const int vbank, const int vbitmap, const int cbank)
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259 {
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260 (void) cbank;
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261 if ((img->bitmap[vbitmap][bmoffs] >> vshift) & 1)
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262 return img->screen[vbank][scroffs] >> 4;
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263 else
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264 return img->screen[vbank][scroffs] & 15;
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265 }
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266
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267
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268 static inline Uint8 dmC64GetGenericMCPixel(
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269 const DMC64Image *img, const int bmoffs, const int scroffs,
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270 const int vshift, const int vbank, const int vbitmap, const int cbank)
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271 {
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272 switch ((img->bitmap[vbitmap][bmoffs] >> vshift) & 3)
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273 {
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274 case 0: return img->bgcolor; break;
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275 case 1: return img->screen[vbank][scroffs] >> 4; break;
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276 case 2: return img->screen[vbank][scroffs] & 15; break;
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277 default: return img->color[cbank][scroffs] & 15; break;
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278 }
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279 }
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280
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281
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282 static inline Uint8 fmtGetGenericSCPixel(
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283 const DMC64Image *img, const int bmoffs, const int scroffs,
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284 const int vshift, const int vbitmap, const int raster)
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285 {
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286 (void) raster;
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287 return dmC64GetGenericSCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0);
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288 }
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289
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290
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291 static inline Uint8 fmtGetGenericMCPixel(
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292 const DMC64Image *img, const int bmoffs, const int scroffs,
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293 const int vshift, const int vbitmap, const int raster)
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294 {
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295 (void) raster;
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296 return dmC64GetGenericMCPixel(img, bmoffs, scroffs, vshift, 0, vbitmap, 0);
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297 }
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298
435
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299
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300 #ifdef __cplusplus
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301 }
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302 #endif
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303
407
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304 #endif // LIB64GFX_H