annotate lib64gfx.h @ 419:936bc27a79d6

Modularize some functions to lib64gfx, fix bitmap -> image conversion, and implement various cleanups.
author Matti Hamalainen <ccr@tnsp.org>
date Sat, 03 Nov 2012 07:53:38 +0200
parents b6a1dc3bd2c3
children e4a3f183e463
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1 /*
418
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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 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 "dmlib.h"
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13
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14 // Bitmap constants
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15 #define C64_SCR_WIDTH 320
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16 #define C64_SCR_HEIGHT 200
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17 #define C64_SCR_CH_WIDTH (C64_SCR_WIDTH/8)
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18 #define C64_SCR_CH_HEIGHT (C64_SCR_HEIGHT/8)
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19 #define C64_SCR_COLOR_SIZE (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT)
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20 #define C64_SCR_SCREEN_SIZE (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT)
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21 #define C64_SCR_BITMAP_SIZE (C64_SCR_WIDTH * C64_SCR_HEIGHT/8)
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22 #define C64_SCR_EXTRADATA 1024
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23 #define C64_SCR_MAX_BANK 8
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24
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25 // C64 video screen pixel aspect ratio on PAL
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26 #define C64_SCR_PAR_XY (0.9365f)
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27
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28 // Sprite constants
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29 #define C64_SPR_WIDTH 3 // bytes
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30 #define C64_SPR_HEIGHT 21 // lines
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31 #define C64_SPR_WIDTH_PX (8 * C64_SPR_WIDTH)
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32 #define C64_SPR_SIZE ((C64_SPR_WIDTH * C64_SPR_HEIGHT) + 1)
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33
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34 // Character constants
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35 #define C64_CHR_WIDTH 1 // bytes
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36 #define C64_CHR_HEIGHT 8 // lines
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37 #define C64_CHR_WIDTH_PX (8 * C64_CHR_WIDTH)
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38 #define C64_CHR_SIZE (C64_CHR_WIDTH * C64_CHR_HEIGHT)
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39
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40 // Etc.
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41 #define C64_RAM_SIZE (64*1024)
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42 #define C64_NCOLORS 16
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43 #define C64_MAX_COLORS 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 // Probe scores
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49 #define DM_PROBE_SCORE_MAX 1000
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50 #define DM_PROBE_SCORE_GOOD 750
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51 #define DM_PROBE_SCORE_AVG 500
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52 #define DM_PROBE_SCORE_MAYBE 250
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53 #define DM_PROBE_SCORE_FALSE 0
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54
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55 enum
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56 {
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57 DM_IFMT_PALETTE,
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58 DM_IFMT_RGB,
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59 DM_IFMT_RGBA,
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60 DM_IFMT_RGB_PLANE,
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61 };
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62
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63
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64 // RGBx color struct
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65 typedef struct
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66 {
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67 Uint8 r, g, b, x;
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68 } DMColor;
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69
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70
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71 // Bitmapped image struct (can be one of types specified by DM_IFMT_*)
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72 typedef struct
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73 {
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74 int width, height, pitch;
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75 BOOL constpal;
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76 int ncolors, ctrans;
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77 DMColor *pal;
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78 Uint8 *data;
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79 } DMImage;
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80
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81
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82 // Different supported C64 bitmap "modes"
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83 enum
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84 {
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85 DM_C64IFMT_HIRES,
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86 DM_C64IFMT_MC,
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87 DM_C64IFMT_HIRES_ILACE,
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88 DM_C64IFMT_MC_ILACE,
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89 DM_C64IFMT_HIRES_FLI,
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90 DM_C64IFMT_MC_FLI,
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91
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92 DM_C64IFMT_LAST_TYPE
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93 };
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94
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95
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96 enum
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97 {
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98 DM_C64ILACE_COLOR,
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99 DM_C64ILACE_RES,
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100 };
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101
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102 typedef struct
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103 {
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104 BOOL multicolor, xexpand, yexpand;
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105 int color, xc, yc;
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106 Uint8 data[C64_SPR_HEIGHT][C64_SPR_WIDTH];
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107 } DMC64Sprite;
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108
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109
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110 typedef struct
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111 {
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112 int type, // Image type (DM_C64IFMT_*)
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113 laceType, // Interlace type (DM_C64ILACE_*)
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114 fliType, // FLI type (if FLI used)
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115 fliLines, // FLI on every # line
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116 laceBank2;
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117
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118 Uint8 color[C64_SCR_MAX_BANK][C64_SCR_COLOR_SIZE],
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119 bitmap[C64_SCR_MAX_BANK][C64_SCR_BITMAP_SIZE],
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120 screen[C64_SCR_MAX_BANK][C64_SCR_SCREEN_SIZE],
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121 extradata[C64_SCR_EXTRADATA],
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122 d020, bgcolor, d022, d023, d024;
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123
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124 Uint8 charset[C64_MAX_CHARS][C64_CHR_HEIGHT * C64_CHR_WIDTH];
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125 DMC64Sprite sprites[C64_MAX_SPRITES];
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126 } DMC64Image;
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127
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128
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129 enum
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130 {
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131 DT_COLOR_RAM,
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132 DT_BITMAP,
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133 DT_SCREEN_RAM,
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134 DT_BGCOLOR,
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135 DT_EXTRADATA,
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136
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137 DT_FUNCTION,
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138
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139 DT_LAST,
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140 };
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141
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142
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143 typedef struct _DMDecodeOp
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144 {
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145 int type;
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146 size_t offs;
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147 int bank;
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148 size_t size;
410
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149 BOOL (*function)(DMC64Image *img, const struct _DMDecodeOp *op, const Uint8 *buf, const size_t len);
407
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150 } DMDecodeOp;
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151
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152
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153 typedef struct _DMC64ImageFormat
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154 {
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155 int type;
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156 char *extension;
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157 char *name;
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158 int (*probe)(const Uint8 *buf, const size_t len);
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159 int (*decode)(DMC64Image *img, const Uint8 *buf, const size_t len, const struct _DMC64ImageFormat *fmt);
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160 int (*convert)(DMImage *, DMC64Image *);
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161
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162 int ndecodeOps;
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163 DMDecodeOp decodeOps[16];
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164 } DMC64ImageFormat;
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165
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166
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167 extern const size_t dmC64DefaultSizes[DT_LAST];
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168 extern DMColor dmC64Palette[C64_NCOLORS];
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169 extern DMC64ImageFormat dmC64ImageFormats[];
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170 extern const int ndmC64ImageFormats;
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171 extern const char * dmC64ImageTypeNames[];
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172
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173
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174 DMImage * dmImageAlloc(int width, int height);
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175 void dmImageFree(DMImage *img);
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176 int dmImageGetBytesPerPixel(int format);
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177
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178
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179 int dmC64ConvertCSData(DMImage *img, int xoffs, int yoffs, const Uint8 *inBuf, int width, int height, BOOL multicolor, int *colors);
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180 int dmC64ProbeGeneric(const Uint8 *buf, const size_t len, DMC64ImageFormat **fmt);
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181 int dmC64DecodeGenericBMP(DMC64Image *img, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt);
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182 int dmC64ConvertGenericBMP2Image(DMImage *screen, const DMC64Image *img);
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183 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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184
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185 int dmReadDataFile(FILE *inFile, const char *filename, Uint8 **buf, size_t *size);
407
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186
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187 #endif // LIB64GFX_H