annotate lib64gfx.h @ 507:272e64259fde

Add function pointers for encoding and convertTo/convertFrom to the DMC64ImageFormat structure.
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 19 Nov 2012 13:49:44 +0200
parents e4a3f183e463
children 43ea59887c69
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rev   line source
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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.
407
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4 * Programmed and designed by Matti 'ccr' Hamalainen
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5 * (C) Copyright 2012 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
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14 #ifdef __cplusplus
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15 extern "C" {
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16 #endif
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17
407
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18
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19 // Bitmap constants
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20 #define C64_SCR_WIDTH 320
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21 #define C64_SCR_HEIGHT 200
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22 #define C64_SCR_CH_WIDTH (C64_SCR_WIDTH/8)
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23 #define C64_SCR_CH_HEIGHT (C64_SCR_HEIGHT/8)
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24 #define C64_SCR_COLOR_SIZE (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT)
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25 #define C64_SCR_SCREEN_SIZE (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT)
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26 #define C64_SCR_BITMAP_SIZE (C64_SCR_WIDTH * C64_SCR_HEIGHT/8)
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27 #define C64_SCR_EXTRADATA 1024
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28 #define C64_SCR_MAX_BANK 8
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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 // Different supported C64 bitmap "modes"
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54 enum
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55 {
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56 DM_C64IFMT_HIRES,
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57 DM_C64IFMT_MC,
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58 DM_C64IFMT_HIRES_ILACE,
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59 DM_C64IFMT_MC_ILACE,
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60 DM_C64IFMT_HIRES_FLI,
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61 DM_C64IFMT_MC_FLI,
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62
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63 DM_C64IFMT_LAST_TYPE
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64 };
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65
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66
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67 enum
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68 {
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69 DM_C64ILACE_COLOR,
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70 DM_C64ILACE_RES,
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71 };
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72
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73 typedef struct
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74 {
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75 BOOL multicolor, xexpand, yexpand;
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76 int color, xc, yc;
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77 Uint8 data[C64_SPR_HEIGHT][C64_SPR_WIDTH];
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78 } DMC64Sprite;
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79
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80
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81 typedef struct
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82 {
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83 int type, // Image type (DM_C64IFMT_*)
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84 laceType, // Interlace type (DM_C64ILACE_*)
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85 fliType, // FLI type (if FLI used)
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86 fliLines, // FLI on every # line
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87 laceBank2;
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88
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89 Uint8 color[C64_SCR_MAX_BANK][C64_SCR_COLOR_SIZE],
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90 bitmap[C64_SCR_MAX_BANK][C64_SCR_BITMAP_SIZE],
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91 screen[C64_SCR_MAX_BANK][C64_SCR_SCREEN_SIZE],
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92 extradata[C64_SCR_EXTRADATA],
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93 d020, bgcolor, d022, d023, d024;
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94
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95 Uint8 charset[C64_MAX_CHARS][C64_CHR_HEIGHT * C64_CHR_WIDTH];
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96 DMC64Sprite sprites[C64_MAX_SPRITES];
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97 } DMC64Image;
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98
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99
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100 enum
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101 {
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102 DT_COLOR_RAM,
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103 DT_BITMAP,
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104 DT_SCREEN_RAM,
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105 DT_BGCOLOR,
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106 DT_EXTRADATA,
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107
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108 DT_FUNCTION,
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109
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110 DT_LAST,
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111 };
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112
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113
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114 typedef struct _DMDecodeOp
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115 {
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116 int type;
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117 size_t offs;
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118 int bank;
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119 size_t size;
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120 BOOL (*function)(DMC64Image *img, const struct _DMDecodeOp *op, const Uint8 *buf, const size_t len);
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121 } DMDecodeOp;
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122
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123
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124 typedef struct _DMC64ImageFormat
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125 {
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126 int type;
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127 char *extension;
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128 char *name;
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129 int (*probe)(const Uint8 *buf, const size_t len);
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130 int (*decode)(DMC64Image *img, const Uint8 *buf, const size_t len, const struct _DMC64ImageFormat *fmt);
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131 int (*encode)(DMC64Image *img, Uint8 **buf, size_t *len, const struct _DMC64ImageFormat *fmt);
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132 int (*convertFrom)(DMImage *, DMC64Image *);
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133 int (*convertTo)(DMImage *, DMC64Image *);
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134
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135 int ndecodeOps;
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136 DMDecodeOp decodeOps[16];
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137 } DMC64ImageFormat;
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138
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139
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140 extern const size_t dmC64DefaultSizes[DT_LAST];
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141 extern DMColor dmC64Palette[C64_NCOLORS];
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142 extern DMC64ImageFormat dmC64ImageFormats[];
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143 extern const int ndmC64ImageFormats;
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144 extern const char * dmC64ImageTypeNames[];
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145
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146
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147 int dmC64ConvertCSData(DMImage *img, int xoffs, int yoffs, const Uint8 *inBuf, int width, int height, BOOL multicolor, int *colors);
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148 int dmC64ProbeGeneric(const Uint8 *buf, const size_t len, DMC64ImageFormat **fmt);
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149 int dmC64DecodeGenericBMP(DMC64Image *img, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt);
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150 int dmC64ConvertGenericBMP2Image(DMImage *screen, const DMC64Image *img);
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151 int dmC64DecodeBMP(DMC64Image *img, const Uint8 *buf, const size_t len, const size_t probeOffs, const size_t loadOffs, DMC64ImageFormat **fmt, DMC64ImageFormat *forced);
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152
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153 int dmReadDataFile(FILE *inFile, const char *filename, Uint8 **buf, size_t *size);
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154
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155
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156 #ifdef __cplusplus
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157 }
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158 #endif
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159
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160 #endif // LIB64GFX_H