| 1 | /*
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| 2 |
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| 3 | gbmtrunc.c - Truncate to lower bits per pixel
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| 4 |
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| 5 | */
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| 6 |
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| 7 | /*...sincludes:0:*/
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| 8 | #include <stdio.h>
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| 9 | #include <stddef.h>
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| 10 | #include <stdlib.h>
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| 11 | #include <string.h>
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| 12 | #include "gbm.h"
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| 13 |
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| 14 | /*...vgbm\46\h:0:*/
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| 15 | /*...e*/
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| 16 | /*...svars:0:*/
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| 17 | static BOOLEAN inited = FALSE;
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| 18 |
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| 19 | /*
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| 20 | For 6Rx6Gx6B, 7Rx8Gx4B palettes etc.
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| 21 | */
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| 22 |
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| 23 | static byte index4[0x100];
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| 24 | static byte index6[0x100];
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| 25 | static byte index7[0x100];
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| 26 | static byte index8[0x100];
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| 27 | static byte index16[0x100];
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| 28 | static byte scale4[] = { 0, 85, 170, 255 };
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| 29 | static byte scale6[] = { 0, 51, 102, 153, 204, 255 };
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| 30 | static byte scale7[] = { 0, 43, 85, 128, 170, 213, 255 };
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| 31 | static byte scale8[] = { 0, 36, 73, 109, 146, 182, 219, 255 };
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| 32 | static byte scale16[] = { 0, 17, 34, 51, 68, 85, 102, 119, 136,
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| 33 | 153, 170, 187, 204, 221, 238, 255 };
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| 34 | /*...e*/
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| 35 | /*...sinit:0:*/
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| 36 | /*
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| 37 | This function initialises this module.
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| 38 | */
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| 39 |
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| 40 | /*...snearest_inx:0:*/
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| 41 | #ifndef abs
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| 42 | #define abs(x) (((x)>=0)?(x):-(x))
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| 43 | #endif
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| 44 |
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| 45 | static byte nearest_inx(byte value, const byte ab[], unsigned short cb)
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| 46 | {
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| 47 | byte b, inx, inx_min;
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| 48 | short diff, diff_min;
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| 49 |
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| 50 | b = ab[0];
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| 51 | diff_min = abs((short) value - (short) b);
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| 52 | inx_min = 0;
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| 53 | for ( inx = 1; (unsigned short) inx < cb; inx++ )
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| 54 | {
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| 55 | b = ab[inx];
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| 56 | diff = abs((short) value - (short) b);
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| 57 | if ( diff < diff_min )
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| 58 | {
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| 59 | diff_min = diff;
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| 60 | inx_min = inx;
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| 61 | }
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| 62 | }
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| 63 | return inx_min;
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| 64 | }
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| 65 | /*...e*/
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| 66 |
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| 67 | static void init(void)
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| 68 | {
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| 69 | int i;
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| 70 |
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| 71 | if ( inited )
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| 72 | return;
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| 73 |
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| 74 | /* For 7 Red x 8 Green x 4 Blue palettes etc. */
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| 75 |
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| 76 | for ( i = 0; i < 0x100; i++ )
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| 77 | {
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| 78 | index4 [i] = nearest_inx((byte) i, scale4 , sizeof(scale4 ));
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| 79 | index6 [i] = nearest_inx((byte) i, scale6 , sizeof(scale6 ));
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| 80 | index7 [i] = nearest_inx((byte) i, scale7 , sizeof(scale7 ));
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| 81 | index8 [i] = nearest_inx((byte) i, scale8 , sizeof(scale8 ));
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| 82 | index16[i] = nearest_inx((byte) i, scale16, sizeof(scale16));
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| 83 | }
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| 84 |
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| 85 | inited = TRUE;
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| 86 | }
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| 87 | /*...e*/
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| 88 | /*...strunc:0:*/
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| 89 | static void trunc(
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| 90 | const GBM *gbm, const byte *src, byte *dest,
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| 91 | int dest_bpp,
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| 92 | void (*trunc_line)(const byte *src, byte *dest, int cx)
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| 93 | )
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| 94 | {
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| 95 | int stride_src = ((gbm->w * 3 + 3) & ~3);
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| 96 | int stride_dest = ((gbm->w * dest_bpp + 31) / 32) * 4;
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| 97 | int y;
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| 98 |
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| 99 | for ( y = 0; y < gbm->h; y++ )
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| 100 | (*trunc_line)(src + y * stride_src, dest + y * stride_dest, gbm->w);
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| 101 | }
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| 102 | /*...e*/
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| 103 | /*...snearest_color:0:*/
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| 104 | static byte nearest_color(byte r, byte g, byte b, GBMRGB *gbmrgb, int n_gbmrgb)
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| 105 | {
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| 106 | int i, i_min, dist_min = 0x30000;
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| 107 | for ( i = 0; i < n_gbmrgb; i++ )
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| 108 | {
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| 109 | int dr = (int) ( (unsigned)r - (unsigned)gbmrgb[i].r );
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| 110 | int dg = (int) ( (unsigned)g - (unsigned)gbmrgb[i].g );
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| 111 | int db = (int) ( (unsigned)b - (unsigned)gbmrgb[i].b );
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| 112 | int dist = dr*dr+dg*dg+db*db;
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| 113 | if ( dist < dist_min )
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| 114 | { dist_min = dist; i_min = i; }
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| 115 | }
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| 116 | return (byte) i_min;
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| 117 | }
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| 118 | /*...e*/
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| 119 | /*...sMAP:0:*/
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| 120 | /* A map is a structure used to accelerate the conversion from r,g,b tuple
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| 121 | to palette index. A map divides RGB space into a cube. Each cube either
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| 122 | maps all its RGB space to a single index, or 0xffff is stored. */
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| 123 |
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| 124 | typedef struct
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| 125 | {
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| 126 | word inx[0x20][0x20][0x20]; /* 64KB */
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| 127 | } MAP;
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| 128 |
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| 129 | static void build_map(GBMRGB *gbmrgb, int n_gbmrgb, MAP *map)
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| 130 | {
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| 131 | int r, g, b;
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| 132 | for ( r = 0; r < 0x100; r += 8 )
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| 133 | for ( g = 0; g < 0x100; g += 8 )
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| 134 | for ( b = 0; b < 0x100; b += 8 )
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| 135 | {
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| 136 | byte i = nearest_color((byte) r , (byte) g , (byte) b , gbmrgb, n_gbmrgb);
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| 137 | if ( i == nearest_color((byte) r , (byte) g , (byte) (b+7), gbmrgb, n_gbmrgb) &&
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| 138 | i == nearest_color((byte) r , (byte) (g+7), (byte) b , gbmrgb, n_gbmrgb) &&
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| 139 | i == nearest_color((byte) r , (byte) (g+7), (byte) (b+7), gbmrgb, n_gbmrgb) &&
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| 140 | i == nearest_color((byte) (r+7), (byte) g , (byte) b , gbmrgb, n_gbmrgb) &&
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| 141 | i == nearest_color((byte) (r+7), (byte) g , (byte) (b+7), gbmrgb, n_gbmrgb) &&
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| 142 | i == nearest_color((byte) (r+7), (byte) (g+7), (byte) b , gbmrgb, n_gbmrgb) &&
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| 143 | i == nearest_color((byte) (r+7), (byte) (g+7), (byte) (b+7), gbmrgb, n_gbmrgb) )
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| 144 | map->inx[r/8][g/8][b/8] = i;
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| 145 | else
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| 146 | map->inx[r/8][g/8][b/8] = (word) 0xffff;
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| 147 | }
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| 148 | }
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| 149 |
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| 150 | static byte nearest_color_via_map(byte r, byte g, byte b, MAP *map, GBMRGB *gbmrgb, int n_gbmrgb)
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| 151 | {
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| 152 | word i = map->inx[r/8][g/8][b/8];
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| 153 | return ( i != (word) 0xffff )
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| 154 | ? (byte) i
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| 155 | : nearest_color(r, g, b, gbmrgb, n_gbmrgb);
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| 156 | }
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| 157 | /*...e*/
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| 158 |
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| 159 | /*...sgbm_trunc_line_24 \45\ truncate to fewer bits per pixel one line:0:*/
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| 160 | void gbm_trunc_line_24(const byte *src, byte *dest, int cx, byte rm, byte gm, byte bm)
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| 161 | {
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| 162 | int x;
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| 163 |
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| 164 | for ( x = 0; x < cx; x++ )
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| 165 | {
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| 166 | *dest++ = (*src++ & bm);
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| 167 | *dest++ = (*src++ & gm);
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| 168 | *dest++ = (*src++ & rm);
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| 169 | }
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| 170 | }
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| 171 | /*...e*/
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| 172 | /*...sgbm_trunc_24 \45\ truncate to fewer bits per pixel:0:*/
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| 173 | void gbm_trunc_24(const GBM *gbm, const byte *data24, byte *data8, byte rm, byte gm, byte bm)
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| 174 | {
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| 175 | int stride = ((gbm->w * 3 + 3) & ~3);
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| 176 | int y;
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| 177 |
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| 178 | for ( y = 0; y < gbm->h; y++ )
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| 179 | gbm_trunc_line_24(data24 + y * stride, data8 + y * stride, gbm->w, rm, gm, bm);
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| 180 | }
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| 181 | /*...e*/
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| 182 |
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| 183 | /*...sgbm_trunc_pal_6R6G6B \45\ return 6Rx6Gx6B palette:0:*/
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| 184 | /*
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| 185 | This function makes the palette for the 6 red x 6 green x 6 blue palette.
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| 186 | 216 palette entrys used. Remaining 40 left blank.
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| 187 | */
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| 188 |
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| 189 | void gbm_trunc_pal_6R6G6B(GBMRGB *gbmrgb)
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| 190 | {
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| 191 | byte volatile r; /* C-Set/2 optimiser fix */
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| 192 | byte volatile g;
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| 193 | byte volatile b;
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| 194 |
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| 195 | init();
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| 196 | memset(gbmrgb, 0x80, 0x100 * sizeof(GBMRGB));
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| 197 | for ( r = 0; r < 6; r++ )
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| 198 | for ( g = 0; g < 6; g++ )
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| 199 | for ( b = 0; b < 6; b++ )
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| 200 | {
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| 201 | gbmrgb->r = scale6[r];
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| 202 | gbmrgb->g = scale6[g];
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| 203 | gbmrgb->b = scale6[b];
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| 204 | gbmrgb++;
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| 205 | }
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| 206 | }
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| 207 | /*...e*/
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| 208 | /*...sgbm_trunc_line_6R6G6B \45\ truncate to 6Rx6Gx6B one line:0:*/
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| 209 | void gbm_trunc_line_6R6G6B(const byte *src, byte *dest, int cx)
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| 210 | {
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| 211 | int x;
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| 212 |
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| 213 | init();
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| 214 |
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| 215 | for ( x = 0; x < cx; x++ )
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| 216 | {
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| 217 | byte bi = index6[*src++];
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| 218 | byte gi = index6[*src++];
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| 219 | byte ri = index6[*src++];
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| 220 |
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| 221 | *dest++ = (byte) (6 * (6 * ri + gi) + bi);
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| 222 | }
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| 223 | }
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| 224 | /*...e*/
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| 225 | /*...sgbm_trunc_6R6G6B \45\ truncate to 6Rx6Gx6B:0:*/
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| 226 | void gbm_trunc_6R6G6B(const GBM *gbm, const byte *data24, byte *data8)
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| 227 | {
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| 228 | trunc(gbm, data24, data8, 8, gbm_trunc_line_6R6G6B);
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| 229 | }
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| 230 | /*...e*/
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| 231 |
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| 232 | /*...sgbm_trunc_pal_7R8G4B \45\ return 7Rx8Gx4B palette:0:*/
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| 233 | /*
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| 234 | This function makes the palette for the 7 red x 8 green x 4 blue palette.
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| 235 | 224 palette entrys used. Remaining 32 left blank.
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| 236 | Colours calculated to match those used by 8514/A PM driver.
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| 237 | */
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| 238 |
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| 239 | void gbm_trunc_pal_7R8G4B(GBMRGB *gbmrgb)
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| 240 | {
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| 241 | byte volatile r; /* C-Set/2 optimiser fix */
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| 242 | byte volatile g;
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| 243 | byte volatile b;
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| 244 |
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| 245 | init();
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| 246 |
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| 247 | memset(gbmrgb, 0x80, 0x100 * sizeof(GBMRGB));
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| 248 | for ( r = 0; r < 7; r++ )
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| 249 | for ( g = 0; g < 8; g++ )
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| 250 | for ( b = 0; b < 4; b++ )
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| 251 | {
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| 252 | gbmrgb->r = scale7[r];
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| 253 | gbmrgb->g = scale8[g];
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| 254 | gbmrgb->b = scale4[b];
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| 255 | gbmrgb++;
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| 256 | }
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| 257 | }
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| 258 | /*...e*/
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| 259 | /*...sgbm_trunc_line_7R8G4B \45\ truncate to 7Rx8Gx4B one line:0:*/
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| 260 | void gbm_trunc_line_7R8G4B(const byte *src, byte *dest, int cx)
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| 261 | {
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| 262 | int x;
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| 263 |
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| 264 | init();
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| 265 |
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| 266 | for ( x = 0; x < cx; x++ )
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| 267 | {
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| 268 | byte bi = index4[*src++];
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| 269 | byte gi = index8[*src++];
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| 270 | byte ri = index7[*src++];
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| 271 |
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| 272 | *dest++ = (byte) (4 * (8 * ri + gi) + bi);
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| 273 | }
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| 274 | }
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| 275 | /*...e*/
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| 276 | /*...sgbm_trunc_7R8G4B \45\ truncate to 7Rx8Gx4B:0:*/
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| 277 | void gbm_trunc_7R8G4B(const GBM *gbm, const byte *data24, byte *data8)
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| 278 | {
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| 279 | trunc(gbm, data24, data8, 8, gbm_trunc_line_7R8G4B);
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| 280 | }
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| 281 | /*...e*/
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| 282 |
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| 283 | /*...sgbm_trunc_pal_VGA \45\ return default VGA palette:0:*/
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| 284 | /*
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| 285 | This function makes the palette for the 16 colour VGA palette.
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| 286 | */
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| 287 |
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| 288 | static GBMRGB gbmrgb_vga[] =
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| 289 | {
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| 290 | 0, 0, 0,
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| 291 | 128, 0, 0,
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| 292 | 0,128, 0,
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| 293 | 128,128, 0,
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| 294 | 0, 0,128,
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| 295 | 128, 0,128,
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| 296 | 0,128,128,
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| 297 | 128,128,128,
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| 298 | 204,204,204,
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| 299 | 255, 0, 0,
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| 300 | 0,255, 0,
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| 301 | 255,255, 0,
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| 302 | 0, 0,255,
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| 303 | 255, 0,255,
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| 304 | 0,255,255,
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| 305 | 255,255,255,
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| 306 | };
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| 307 |
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| 308 | void gbm_trunc_pal_VGA(GBMRGB *gbmrgb)
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| 309 | {
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| 310 | init();
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| 311 | memcpy((char *) gbmrgb, (char *) gbmrgb_vga, sizeof(gbmrgb_vga));
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| 312 | }
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| 313 | /*...e*/
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| 314 | /*...sgbm_trunc_line_VGA \45\ truncate to default VGA palette:0:*/
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| 315 | /*...scalc_nearest:0:*/
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| 316 | /*
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| 317 | This function, when given am RGB colour, finds the VGA palette entry closest
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| 318 | to it. We deliberately bias away from the two grey palette entries.
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| 319 | */
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| 320 |
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| 321 | static byte calc_nearest(byte r, byte g, byte b)
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| 322 | {
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| 323 | long min_dist = 3L * 256L * 256L * 10L;
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| 324 | byte bi, bi_min;
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| 325 |
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| 326 | for ( bi = 0; bi < 0x10; bi++ )
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| 327 | {
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| 328 | long b_dist = ((long) b - (long) gbmrgb_vga[bi].b);
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| 329 | long g_dist = ((long) g - (long) gbmrgb_vga[bi].g);
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| 330 | long r_dist = ((long) r - (long) gbmrgb_vga[bi].r);
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| 331 | long dist = r_dist * r_dist + g_dist * g_dist + b_dist * b_dist;
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| 332 |
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| 333 | if ( dist < min_dist )
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| 334 | {
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| 335 | min_dist = dist;
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| 336 | bi_min = bi;
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| 337 | }
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| 338 | }
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| 339 | return bi_min;
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| 340 | }
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| 341 | /*...e*/
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| 342 | /*...snearest_colour:0:*/
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| 343 | /*
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| 344 | This function finds the closest VGA palette colour to a given RGB value.
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| 345 | It uses a lookup table to avoid performing distance calculations to the
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| 346 | 16 palette entrys. The table is pre-calculated.
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| 347 | */
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| 348 |
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| 349 | /*...squick lookup table:0:*/
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| 350 | /*...v_gbmtrun\46\c \45\ used to make quick_tab:0:*/
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| 351 |
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| 352 | static byte quick_tab[16][16][16] =
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| 353 | {
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| 354 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
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| 355 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
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| 356 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
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| 357 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
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| 358 | 255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,12,
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| 359 | 2,2,2,2,255,6,6,6,6,6,6,6,6,255,12,12,
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| 360 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,255,12,
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| 361 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,6,255,
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| 362 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,6,255,
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| 363 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,255,14,
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| 364 | 2,2,2,2,255,6,6,6,6,6,6,6,6,255,14,14,
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| 365 | 2,2,2,2,255,6,6,6,6,6,6,6,255,14,14,14,
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| 366 | 10,10,10,10,255,6,6,6,6,6,6,255,14,14,14,14,
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| 367 | 10,10,10,10,10,255,6,6,6,6,255,14,14,14,14,14,
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| 368 | 10,10,10,10,10,10,255,6,6,255,14,14,14,14,14,14,
|
|---|
| 369 | 10,10,10,10,10,10,10,255,255,14,14,14,14,14,14,14,
|
|---|
| 370 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 371 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 372 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 373 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 374 | 255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,12,
|
|---|
| 375 | 2,2,2,2,255,6,6,6,6,6,6,6,6,255,12,12,
|
|---|
| 376 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,255,12,
|
|---|
| 377 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,6,255,
|
|---|
| 378 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,6,255,
|
|---|
| 379 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,255,14,
|
|---|
| 380 | 2,2,2,2,255,6,6,6,6,6,6,6,6,255,14,14,
|
|---|
| 381 | 2,2,2,2,255,6,6,6,6,6,6,6,255,14,14,14,
|
|---|
| 382 | 10,10,10,10,255,6,6,6,6,6,6,255,14,14,14,14,
|
|---|
| 383 | 10,10,10,10,10,255,6,6,6,6,255,14,14,14,14,14,
|
|---|
| 384 | 10,10,10,10,10,10,255,6,6,255,14,14,14,14,14,14,
|
|---|
| 385 | 10,10,10,10,10,10,10,255,255,14,14,14,14,14,14,14,
|
|---|
| 386 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 387 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 388 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 389 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 390 | 255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,12,
|
|---|
| 391 | 2,2,2,2,255,6,6,6,6,6,6,6,6,255,12,12,
|
|---|
| 392 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,255,12,
|
|---|
| 393 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,6,255,
|
|---|
| 394 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,6,255,
|
|---|
| 395 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,255,14,
|
|---|
| 396 | 2,2,2,2,255,6,6,6,6,6,6,6,6,255,14,14,
|
|---|
| 397 | 2,2,2,2,255,6,6,6,6,6,6,6,255,14,14,14,
|
|---|
| 398 | 10,10,10,10,255,6,6,6,6,6,6,255,14,14,14,14,
|
|---|
| 399 | 10,10,10,10,10,255,6,6,6,6,255,14,14,14,14,14,
|
|---|
| 400 | 10,10,10,10,10,10,255,6,6,255,14,14,14,14,14,14,
|
|---|
| 401 | 10,10,10,10,10,10,10,255,255,14,14,14,14,14,14,14,
|
|---|
| 402 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 403 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 404 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 405 | 0,0,0,0,255,4,4,4,4,4,4,4,12,12,12,12,
|
|---|
| 406 | 255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,12,
|
|---|
| 407 | 2,2,2,2,255,6,6,6,6,6,6,6,6,255,12,12,
|
|---|
| 408 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,255,12,
|
|---|
| 409 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,6,255,
|
|---|
| 410 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,6,255,
|
|---|
| 411 | 2,2,2,2,255,6,6,6,6,6,6,6,6,6,255,14,
|
|---|
| 412 | 2,2,2,2,255,6,6,6,6,6,6,6,6,255,14,14,
|
|---|
| 413 | 2,2,2,2,255,6,6,6,6,6,6,6,255,14,14,14,
|
|---|
| 414 | 10,10,10,10,255,6,6,6,6,6,6,255,14,14,14,14,
|
|---|
| 415 | 10,10,10,10,10,255,6,6,6,6,255,14,14,14,14,14,
|
|---|
| 416 | 10,10,10,10,10,10,255,6,6,255,14,14,14,14,14,14,
|
|---|
| 417 | 10,10,10,10,10,10,10,255,255,14,14,14,14,14,14,14,
|
|---|
| 418 | 255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,12,
|
|---|
| 419 | 255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,12,
|
|---|
| 420 | 255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,12,
|
|---|
| 421 | 255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,12,
|
|---|
| 422 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,12,12,
|
|---|
| 423 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,12,
|
|---|
| 424 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|---|
| 425 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|---|
| 426 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|---|
| 427 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|---|
| 428 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,14,
|
|---|
| 429 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,14,14,
|
|---|
| 430 | 255,255,255,255,255,255,255,255,255,255,255,255,255,14,14,14,
|
|---|
| 431 | 10,10,10,10,255,255,255,255,255,255,255,255,14,14,14,14,
|
|---|
| 432 | 10,10,10,10,10,255,255,255,255,255,255,14,14,14,14,14,
|
|---|
| 433 | 10,10,10,10,10,10,255,255,255,255,14,14,14,14,14,14,
|
|---|
| 434 | 1,1,1,1,255,5,5,5,5,5,5,5,5,255,12,12,
|
|---|
| 435 | 1,1,1,1,255,5,5,5,5,5,5,5,5,255,12,12,
|
|---|
| 436 | 1,1,1,1,255,5,5,5,5,5,5,5,5,255,12,12,
|
|---|
| 437 | 1,1,1,1,255,5,5,5,5,5,5,5,5,255,12,12,
|
|---|
| 438 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,12,
|
|---|
| 439 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,255,255,
|
|---|
| 440 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,255,
|
|---|
| 441 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,7,
|
|---|
| 442 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,7,
|
|---|
| 443 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,255,
|
|---|
| 444 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,255,255,
|
|---|
| 445 | 3,3,3,3,255,7,7,7,7,7,7,7,7,255,255,255,
|
|---|
| 446 | 3,3,3,3,255,7,7,7,7,7,7,7,255,255,255,14,
|
|---|
| 447 | 255,255,255,255,255,7,7,7,7,7,7,255,255,255,14,14,
|
|---|
| 448 | 10,10,10,10,255,255,7,7,7,7,255,255,255,14,14,14,
|
|---|
| 449 | 10,10,10,10,10,255,255,7,7,255,255,255,14,14,14,14,
|
|---|
| 450 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,255,12,
|
|---|
| 451 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,255,12,
|
|---|
| 452 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,255,12,
|
|---|
| 453 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,255,12,
|
|---|
| 454 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|---|
| 455 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,255,
|
|---|
| 456 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,7,
|
|---|
| 457 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,7,
|
|---|
| 458 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,255,
|
|---|
| 459 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,255,255,
|
|---|
| 460 | 3,3,3,3,255,7,7,7,7,7,7,7,7,255,255,255,
|
|---|
| 461 | 3,3,3,3,255,7,7,7,7,7,7,7,255,255,255,255,
|
|---|
| 462 | 3,3,3,3,255,7,7,7,7,7,7,255,255,255,255,255,
|
|---|
| 463 | 3,3,3,3,255,7,7,7,7,7,255,255,255,255,255,255,
|
|---|
| 464 | 255,255,255,255,255,7,7,7,7,255,255,255,255,255,255,255,
|
|---|
| 465 | 10,10,10,10,255,255,7,7,255,255,255,255,255,255,255,255,
|
|---|
| 466 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,5,255,
|
|---|
| 467 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,5,255,
|
|---|
| 468 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,5,255,
|
|---|
| 469 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,5,255,
|
|---|
| 470 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|---|
| 471 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,7,
|
|---|
| 472 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,7,
|
|---|
| 473 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,255,
|
|---|
| 474 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,255,255,
|
|---|
| 475 | 3,3,3,3,255,7,7,7,7,7,7,7,7,255,255,255,
|
|---|
| 476 | 3,3,3,3,255,7,7,7,7,7,7,7,255,255,255,8,
|
|---|
| 477 | 3,3,3,3,255,7,7,7,7,7,7,255,255,255,8,8,
|
|---|
| 478 | 3,3,3,3,255,7,7,7,7,7,255,255,255,8,8,8,
|
|---|
| 479 | 3,3,3,3,255,7,7,7,7,255,255,255,8,8,8,8,
|
|---|
| 480 | 3,3,3,3,255,7,7,7,255,255,255,8,8,8,8,8,
|
|---|
| 481 | 255,255,255,255,255,7,7,255,255,255,8,8,8,8,8,255,
|
|---|
| 482 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,5,255,
|
|---|
| 483 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,5,255,
|
|---|
| 484 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,5,255,
|
|---|
| 485 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,5,255,
|
|---|
| 486 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|---|
| 487 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,7,
|
|---|
| 488 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,255,
|
|---|
| 489 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,255,255,
|
|---|
| 490 | 3,3,3,3,255,7,7,7,7,7,7,7,7,255,255,255,
|
|---|
| 491 | 3,3,3,3,255,7,7,7,7,7,7,7,255,255,255,8,
|
|---|
| 492 | 3,3,3,3,255,7,7,7,7,7,7,255,255,255,8,8,
|
|---|
| 493 | 3,3,3,3,255,7,7,7,7,7,255,255,255,8,8,8,
|
|---|
| 494 | 3,3,3,3,255,7,7,7,7,255,255,255,8,8,8,8,
|
|---|
| 495 | 3,3,3,3,255,7,7,7,255,255,255,8,8,8,8,8,
|
|---|
| 496 | 3,3,3,3,255,7,7,255,255,255,8,8,8,8,8,8,
|
|---|
| 497 | 255,255,255,255,255,7,255,255,255,8,8,8,8,8,8,8,
|
|---|
| 498 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,255,13,
|
|---|
| 499 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,255,13,
|
|---|
| 500 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,255,13,
|
|---|
| 501 | 1,1,1,1,255,5,5,5,5,5,5,5,5,5,255,13,
|
|---|
| 502 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
|
|---|
| 503 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,7,255,
|
|---|
| 504 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,255,255,
|
|---|
| 505 | 3,3,3,3,255,7,7,7,7,7,7,7,7,255,255,255,
|
|---|
| 506 | 3,3,3,3,255,7,7,7,7,7,7,7,255,255,255,8,
|
|---|
| 507 | 3,3,3,3,255,7,7,7,7,7,7,255,255,255,8,8,
|
|---|
| 508 | 3,3,3,3,255,7,7,7,7,7,255,255,255,8,8,8,
|
|---|
| 509 | 3,3,3,3,255,7,7,7,7,255,255,255,8,8,8,8,
|
|---|
| 510 | 3,3,3,3,255,7,7,7,255,255,255,8,8,8,8,8,
|
|---|
| 511 | 3,3,3,3,255,7,7,255,255,255,8,8,8,8,8,8,
|
|---|
| 512 | 255,255,255,255,255,7,255,255,255,8,8,8,8,8,8,8,
|
|---|
| 513 | 11,11,11,11,255,255,255,255,8,8,8,8,8,8,8,8,
|
|---|
| 514 | 1,1,1,1,255,5,5,5,5,5,5,5,5,255,13,13,
|
|---|
| 515 | 1,1,1,1,255,5,5,5,5,5,5,5,5,255,13,13,
|
|---|
| 516 | 1,1,1,1,255,5,5,5,5,5,5,5,5,255,13,13,
|
|---|
| 517 | 1,1,1,1,255,5,5,5,5,5,5,5,5,255,13,13,
|
|---|
| 518 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,13,
|
|---|
| 519 | 3,3,3,3,255,7,7,7,7,7,7,7,7,7,255,255,
|
|---|
| 520 | 3,3,3,3,255,7,7,7,7,7,7,7,7,255,255,255,
|
|---|
| 521 | 3,3,3,3,255,7,7,7,7,7,7,7,255,255,255,8,
|
|---|
| 522 | 3,3,3,3,255,7,7,7,7,7,7,255,255,255,8,8,
|
|---|
| 523 | 3,3,3,3,255,7,7,7,7,7,255,255,255,8,8,8,
|
|---|
| 524 | 3,3,3,3,255,7,7,7,7,255,255,255,8,8,8,8,
|
|---|
| 525 | 3,3,3,3,255,7,7,7,255,255,255,8,8,8,8,8,
|
|---|
| 526 | 3,3,3,3,255,7,7,255,255,255,8,8,8,8,8,8,
|
|---|
| 527 | 255,255,255,255,255,7,255,255,255,8,8,8,8,8,8,8,
|
|---|
| 528 | 11,11,11,11,255,255,255,255,8,8,8,8,8,8,8,8,
|
|---|
| 529 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,8,
|
|---|
| 530 | 1,1,1,1,255,5,5,5,5,5,5,5,255,13,13,13,
|
|---|
| 531 | 1,1,1,1,255,5,5,5,5,5,5,5,255,13,13,13,
|
|---|
| 532 | 1,1,1,1,255,5,5,5,5,5,5,5,255,13,13,13,
|
|---|
| 533 | 1,1,1,1,255,5,5,5,5,5,5,5,255,13,13,13,
|
|---|
| 534 | 255,255,255,255,255,255,255,255,255,255,255,255,255,255,13,13,
|
|---|
| 535 | 3,3,3,3,255,7,7,7,7,7,7,7,7,255,255,255,
|
|---|
| 536 | 3,3,3,3,255,7,7,7,7,7,7,7,255,255,255,255,
|
|---|
| 537 | 3,3,3,3,255,7,7,7,7,7,7,255,255,255,8,8,
|
|---|
| 538 | 3,3,3,3,255,7,7,7,7,7,255,255,255,8,8,8,
|
|---|
| 539 | 3,3,3,3,255,7,7,7,7,255,255,255,8,8,8,8,
|
|---|
| 540 | 3,3,3,3,255,7,7,7,255,255,255,8,8,8,8,8,
|
|---|
| 541 | 3,3,3,3,255,7,7,255,255,255,8,8,8,8,8,8,
|
|---|
| 542 | 255,255,255,255,255,7,255,255,255,8,8,8,8,8,8,8,
|
|---|
| 543 | 11,11,11,11,255,255,255,255,8,8,8,8,8,8,8,8,
|
|---|
| 544 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,8,
|
|---|
| 545 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,255,
|
|---|
| 546 | 9,9,9,9,255,5,5,5,5,5,5,255,13,13,13,13,
|
|---|
| 547 | 9,9,9,9,255,5,5,5,5,5,5,255,13,13,13,13,
|
|---|
| 548 | 9,9,9,9,255,5,5,5,5,5,5,255,13,13,13,13,
|
|---|
| 549 | 9,9,9,9,255,5,5,5,5,5,5,255,13,13,13,13,
|
|---|
| 550 | 255,255,255,255,255,255,255,255,255,255,255,255,255,13,13,13,
|
|---|
| 551 | 3,3,3,3,255,7,7,7,7,7,7,7,255,255,255,13,
|
|---|
| 552 | 3,3,3,3,255,7,7,7,7,7,7,255,255,255,255,255,
|
|---|
| 553 | 3,3,3,3,255,7,7,7,7,7,255,255,255,8,8,8,
|
|---|
| 554 | 3,3,3,3,255,7,7,7,7,255,255,255,8,8,8,8,
|
|---|
| 555 | 3,3,3,3,255,7,7,7,255,255,255,8,8,8,8,8,
|
|---|
| 556 | 3,3,3,3,255,7,7,255,255,255,8,8,8,8,8,8,
|
|---|
| 557 | 255,255,255,255,255,7,255,255,255,8,8,8,8,8,8,8,
|
|---|
| 558 | 11,11,11,11,255,255,255,255,8,8,8,8,8,8,8,8,
|
|---|
| 559 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,8,
|
|---|
| 560 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,255,
|
|---|
| 561 | 11,11,11,11,11,11,255,8,8,8,8,8,8,8,255,255,
|
|---|
| 562 | 9,9,9,9,9,255,5,5,5,5,255,13,13,13,13,13,
|
|---|
| 563 | 9,9,9,9,9,255,5,5,5,5,255,13,13,13,13,13,
|
|---|
| 564 | 9,9,9,9,9,255,5,5,5,5,255,13,13,13,13,13,
|
|---|
| 565 | 9,9,9,9,9,255,5,5,5,5,255,13,13,13,13,13,
|
|---|
| 566 | 9,9,9,9,255,255,255,255,255,255,255,255,13,13,13,13,
|
|---|
| 567 | 255,255,255,255,255,7,7,7,7,7,7,255,255,255,13,13,
|
|---|
| 568 | 3,3,3,3,255,7,7,7,7,7,255,255,255,255,255,255,
|
|---|
| 569 | 3,3,3,3,255,7,7,7,7,255,255,255,8,8,8,8,
|
|---|
| 570 | 3,3,3,3,255,7,7,7,255,255,255,8,8,8,8,8,
|
|---|
| 571 | 3,3,3,3,255,7,7,255,255,255,8,8,8,8,8,8,
|
|---|
| 572 | 255,255,255,255,255,7,255,255,255,8,8,8,8,8,8,8,
|
|---|
| 573 | 11,11,11,11,255,255,255,255,8,8,8,8,8,8,8,8,
|
|---|
| 574 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,8,
|
|---|
| 575 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,255,
|
|---|
| 576 | 11,11,11,11,11,11,255,8,8,8,8,8,8,8,255,255,
|
|---|
| 577 | 11,11,11,11,11,11,255,8,8,8,8,8,8,255,255,255,
|
|---|
| 578 | 9,9,9,9,9,9,255,5,5,255,13,13,13,13,13,13,
|
|---|
| 579 | 9,9,9,9,9,9,255,5,5,255,13,13,13,13,13,13,
|
|---|
| 580 | 9,9,9,9,9,9,255,5,5,255,13,13,13,13,13,13,
|
|---|
| 581 | 9,9,9,9,9,9,255,5,5,255,13,13,13,13,13,13,
|
|---|
| 582 | 9,9,9,9,9,255,255,255,255,255,255,13,13,13,13,13,
|
|---|
| 583 | 9,9,9,9,255,255,7,7,7,7,255,255,255,13,13,13,
|
|---|
| 584 | 255,255,255,255,255,7,7,7,7,255,255,255,255,255,255,255,
|
|---|
| 585 | 3,3,3,3,255,7,7,7,255,255,255,8,8,8,8,8,
|
|---|
| 586 | 3,3,3,3,255,7,7,255,255,255,8,8,8,8,8,8,
|
|---|
| 587 | 255,255,255,255,255,7,255,255,255,8,8,8,8,8,8,8,
|
|---|
| 588 | 11,11,11,11,255,255,255,255,8,8,8,8,8,8,8,8,
|
|---|
| 589 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,8,
|
|---|
| 590 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,255,
|
|---|
| 591 | 11,11,11,11,11,11,255,8,8,8,8,8,8,8,255,255,
|
|---|
| 592 | 11,11,11,11,11,11,255,8,8,8,8,8,8,255,255,255,
|
|---|
| 593 | 11,11,11,11,11,11,255,8,8,8,8,8,255,255,255,15,
|
|---|
| 594 | 9,9,9,9,9,9,9,255,255,13,13,13,13,13,13,13,
|
|---|
| 595 | 9,9,9,9,9,9,9,255,255,13,13,13,13,13,13,13,
|
|---|
| 596 | 9,9,9,9,9,9,9,255,255,13,13,13,13,13,13,13,
|
|---|
| 597 | 9,9,9,9,9,9,9,255,255,13,13,13,13,13,13,13,
|
|---|
| 598 | 9,9,9,9,9,9,255,255,255,255,13,13,13,13,13,13,
|
|---|
| 599 | 9,9,9,9,9,255,255,7,7,255,255,255,13,13,13,13,
|
|---|
| 600 | 9,9,9,9,255,255,7,7,255,255,255,255,255,255,255,255,
|
|---|
| 601 | 255,255,255,255,255,7,7,255,255,255,8,8,8,8,8,255,
|
|---|
| 602 | 255,255,255,255,255,7,255,255,255,8,8,8,8,8,8,8,
|
|---|
| 603 | 11,11,11,11,255,255,255,255,8,8,8,8,8,8,8,8,
|
|---|
| 604 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,8,
|
|---|
| 605 | 11,11,11,11,11,255,255,8,8,8,8,8,8,8,8,255,
|
|---|
| 606 | 11,11,11,11,11,11,255,8,8,8,8,8,8,8,255,255,
|
|---|
| 607 | 11,11,11,11,11,11,255,8,8,8,8,8,8,255,255,255,
|
|---|
| 608 | 11,11,11,11,11,11,255,8,8,8,8,8,255,255,255,15,
|
|---|
| 609 | 11,11,11,11,11,11,255,255,8,8,8,255,255,255,15,15,
|
|---|
| 610 | };
|
|---|
| 611 | /*...e*/
|
|---|
| 612 |
|
|---|
| 613 | static byte nearest_colour(byte r, byte g, byte b)
|
|---|
| 614 | {
|
|---|
| 615 | byte i;
|
|---|
| 616 |
|
|---|
| 617 | if ( (i = quick_tab[r >> 4][g >> 4][b >> 4]) != (byte) 0xff )
|
|---|
| 618 | return i;
|
|---|
| 619 |
|
|---|
| 620 | return calc_nearest(r, g, b);
|
|---|
| 621 | }
|
|---|
| 622 | /*...e*/
|
|---|
| 623 |
|
|---|
| 624 | void gbm_trunc_line_VGA(const byte *src, byte *dest, int cx)
|
|---|
| 625 | {
|
|---|
| 626 | BOOLEAN left = TRUE;
|
|---|
| 627 | int x;
|
|---|
| 628 |
|
|---|
| 629 | init();
|
|---|
| 630 |
|
|---|
| 631 | for ( x = 0; x < cx; x++ )
|
|---|
| 632 | {
|
|---|
| 633 | byte b = *src++;
|
|---|
| 634 | byte g = *src++;
|
|---|
| 635 | byte r = *src++;
|
|---|
| 636 | byte inx = nearest_colour(r, g, b);
|
|---|
| 637 |
|
|---|
| 638 | if ( left )
|
|---|
| 639 | *dest = (byte) (inx << 4);
|
|---|
| 640 | else
|
|---|
| 641 | *dest++ |= inx;
|
|---|
| 642 |
|
|---|
| 643 | left = !left;
|
|---|
| 644 | }
|
|---|
| 645 | }
|
|---|
| 646 | /*...e*/
|
|---|
| 647 | /*...sgbm_trunc_VGA \45\ truncate to default VGA palette:0:*/
|
|---|
| 648 | void gbm_trunc_VGA(const GBM *gbm, const byte *data24, byte *data4)
|
|---|
| 649 | {
|
|---|
| 650 | trunc(gbm, data24, data4, 4, gbm_trunc_line_VGA);
|
|---|
| 651 | }
|
|---|
| 652 | /*...e*/
|
|---|
| 653 |
|
|---|
| 654 | /*...sgbm_trunc_pal_8 \45\ return default 8 colour palette:0:*/
|
|---|
| 655 | /*
|
|---|
| 656 | This function makes the palette for the 16 colour VGA palette.
|
|---|
| 657 | */
|
|---|
| 658 |
|
|---|
| 659 | static GBMRGB gbmrgb_8[] =
|
|---|
| 660 | {
|
|---|
| 661 | 0, 0, 0,
|
|---|
| 662 | 0, 0,255,
|
|---|
| 663 | 0,255, 0,
|
|---|
| 664 | 0,255,255,
|
|---|
| 665 | 255, 0, 0,
|
|---|
| 666 | 255, 0,255,
|
|---|
| 667 | 255,255, 0,
|
|---|
| 668 | 255,255,255,
|
|---|
| 669 | 0, 0, 0,
|
|---|
| 670 | 0, 0, 0,
|
|---|
| 671 | 0, 0, 0,
|
|---|
| 672 | 0, 0, 0,
|
|---|
| 673 | 0, 0, 0,
|
|---|
| 674 | 0, 0, 0,
|
|---|
| 675 | 0, 0, 0,
|
|---|
| 676 | 0, 0, 0,
|
|---|
| 677 | };
|
|---|
| 678 |
|
|---|
| 679 | void gbm_trunc_pal_8(GBMRGB *gbmrgb)
|
|---|
| 680 | {
|
|---|
| 681 | init();
|
|---|
| 682 | memcpy((char *) gbmrgb, (char *) gbmrgb_8, sizeof(gbmrgb_8));
|
|---|
| 683 | }
|
|---|
| 684 | /*...e*/
|
|---|
| 685 | /*...sgbm_trunc_line_8 \45\ truncate to default 8 colour palette:0:*/
|
|---|
| 686 | void gbm_trunc_line_8(const byte *src, byte *dest, int cx)
|
|---|
| 687 | {
|
|---|
| 688 | BOOLEAN left = TRUE;
|
|---|
| 689 | int x;
|
|---|
| 690 |
|
|---|
| 691 | init();
|
|---|
| 692 |
|
|---|
| 693 | for ( x = 0; x < cx; x++ )
|
|---|
| 694 | {
|
|---|
| 695 | byte b = ((*src++ & 0x80U) >> 7);
|
|---|
| 696 | byte g = ((*src++ & 0x80U) >> 6);
|
|---|
| 697 | byte r = ((*src++ & 0x80U) >> 5);
|
|---|
| 698 | byte inx = r|g|b;
|
|---|
| 699 |
|
|---|
| 700 | if ( left )
|
|---|
| 701 | *dest = (byte) (inx << 4);
|
|---|
| 702 | else
|
|---|
| 703 | *dest++ |= inx;
|
|---|
| 704 |
|
|---|
| 705 | left = !left;
|
|---|
| 706 | }
|
|---|
| 707 | }
|
|---|
| 708 | /*...e*/
|
|---|
| 709 | /*...sgbm_trunc_8 \45\ truncate to default 8 colour palette:0:*/
|
|---|
| 710 | void gbm_trunc_8(const GBM *gbm, const byte *data24, byte *data4)
|
|---|
| 711 | {
|
|---|
| 712 | trunc(gbm, data24, data4, 4, gbm_trunc_line_8);
|
|---|
| 713 | }
|
|---|
| 714 | /*...e*/
|
|---|
| 715 |
|
|---|
| 716 | /*...sgbm_trunc_pal_4G \45\ return 4 bit greyscale palette:0:*/
|
|---|
| 717 | /*
|
|---|
| 718 | This function makes the palette for the 16 colour VGA palette.
|
|---|
| 719 | */
|
|---|
| 720 |
|
|---|
| 721 | void gbm_trunc_pal_4G(GBMRGB *gbmrgb)
|
|---|
| 722 | {
|
|---|
| 723 | int i;
|
|---|
| 724 |
|
|---|
| 725 | init();
|
|---|
| 726 | for ( i = 0; i < 0x10; i++ )
|
|---|
| 727 | {
|
|---|
| 728 | gbmrgb[i].r = scale16[i];
|
|---|
| 729 | gbmrgb[i].g = scale16[i];
|
|---|
| 730 | gbmrgb[i].b = scale16[i];
|
|---|
| 731 | }
|
|---|
| 732 | }
|
|---|
| 733 | /*...e*/
|
|---|
| 734 | /*...sgbm_trunc_line_4G \45\ truncate to 4 bit greyscale palette:0:*/
|
|---|
| 735 | void gbm_trunc_line_4G(const byte *src, byte *dest, int cx)
|
|---|
| 736 | {
|
|---|
| 737 | BOOLEAN left = TRUE;
|
|---|
| 738 | int x;
|
|---|
| 739 |
|
|---|
| 740 | init();
|
|---|
| 741 |
|
|---|
| 742 | for ( x = 0; x < cx; x++ )
|
|---|
| 743 | {
|
|---|
| 744 | byte b = *src++;
|
|---|
| 745 | byte g = *src++;
|
|---|
| 746 | byte r = *src++;
|
|---|
| 747 | byte k = (byte) (((word) r * 77U + (word) g * 150U + (word) b * 29U) >> 8);
|
|---|
| 748 | byte inx = index16[k];
|
|---|
| 749 |
|
|---|
| 750 | if ( left )
|
|---|
| 751 | *dest = (byte) (inx << 4);
|
|---|
| 752 | else
|
|---|
| 753 | *dest++ |= inx;
|
|---|
| 754 |
|
|---|
| 755 | left = !left;
|
|---|
| 756 | }
|
|---|
| 757 | }
|
|---|
| 758 | /*...e*/
|
|---|
| 759 | /*...sgbm_trunc_4G \45\ truncate to 4 bit greyscale palette:0:*/
|
|---|
| 760 | void gbm_trunc_4G(const GBM *gbm, const byte *data24, byte *data4)
|
|---|
| 761 | {
|
|---|
| 762 | trunc(gbm, data24, data4, 4, gbm_trunc_line_4G);
|
|---|
| 763 | }
|
|---|
| 764 | /*...e*/
|
|---|
| 765 |
|
|---|
| 766 | /*...sgbm_trunc_pal_BW \45\ return black and white palette:0:*/
|
|---|
| 767 | /*
|
|---|
| 768 | This function makes the black and white palette.
|
|---|
| 769 | (We consider the image to be black on white, hence the ordering).
|
|---|
| 770 | */
|
|---|
| 771 |
|
|---|
| 772 | static GBMRGB gbmrgb_bw[] =
|
|---|
| 773 | {
|
|---|
| 774 | 255,255,255,
|
|---|
| 775 | 0,0,0,
|
|---|
| 776 | };
|
|---|
| 777 |
|
|---|
| 778 | void gbm_trunc_pal_BW(GBMRGB *gbmrgb)
|
|---|
| 779 | {
|
|---|
| 780 | init();
|
|---|
| 781 | memcpy((char *) gbmrgb, (char *) gbmrgb_bw, sizeof(gbmrgb_bw));
|
|---|
| 782 | }
|
|---|
| 783 | /*...e*/
|
|---|
| 784 | /*...sgbm_trunc_line_BW \45\ truncate to black and white:0:*/
|
|---|
| 785 | void gbm_trunc_line_BW(const byte *src, byte *dest, int cx)
|
|---|
| 786 | {
|
|---|
| 787 | int x, bit = 0;
|
|---|
| 788 | byte v = 0xff;
|
|---|
| 789 |
|
|---|
| 790 | init();
|
|---|
| 791 |
|
|---|
| 792 | for ( x = 0; x < cx; x++ )
|
|---|
| 793 | {
|
|---|
| 794 | byte b = *src++;
|
|---|
| 795 | byte g = *src++;
|
|---|
| 796 | byte r = *src++;
|
|---|
| 797 | word k = (word) ((word) r * 77 + (word) g * 150 + (word) b * 29);
|
|---|
| 798 |
|
|---|
| 799 | if ( k >= 0x8000U )
|
|---|
| 800 | v &= ~(0x80U >> bit);
|
|---|
| 801 |
|
|---|
| 802 | if ( ++bit == 8 )
|
|---|
| 803 | {
|
|---|
| 804 | bit = 0;
|
|---|
| 805 | *dest++ = v;
|
|---|
| 806 | v = 0xff;
|
|---|
| 807 | }
|
|---|
| 808 | }
|
|---|
| 809 | if ( bit )
|
|---|
| 810 | *dest = v;
|
|---|
| 811 | }
|
|---|
| 812 | /*...e*/
|
|---|
| 813 | /*...sgbm_trunc_BW \45\ truncate to black and white:0:*/
|
|---|
| 814 | void gbm_trunc_BW(const GBM *gbm, const byte *data24, byte *data1)
|
|---|
| 815 | {
|
|---|
| 816 | trunc(gbm, data24, data1, 1, gbm_trunc_line_BW);
|
|---|
| 817 | }
|
|---|
| 818 | /*...e*/
|
|---|
| 819 |
|
|---|
| 820 | /*...sgbm_trunc_1bpp \45\ map to user specified 1bpp palette:0:*/
|
|---|
| 821 | void gbm_trunc_1bpp(
|
|---|
| 822 | const GBM *gbm, const byte *data24, byte *data1,
|
|---|
| 823 | GBMRGB *gbmrgb, int n_gbmrgb
|
|---|
| 824 | )
|
|---|
| 825 | {
|
|---|
| 826 | int stride_src = ((gbm->w * 3 + 3) & ~3);
|
|---|
| 827 | int step_src = stride_src - gbm->w * 3;
|
|---|
| 828 | int stride_dest = ((gbm->w + 31) / 32) * 4;
|
|---|
| 829 | int y;
|
|---|
| 830 | MAP map;
|
|---|
| 831 | build_map(gbmrgb, n_gbmrgb, &map);
|
|---|
| 832 | memset(data1, 0, gbm->h * stride_dest);
|
|---|
| 833 | for ( y = 0; y < gbm->h; y++ )
|
|---|
| 834 | {
|
|---|
| 835 | int x;
|
|---|
| 836 | for ( x = 0; x < gbm->w; x++ )
|
|---|
| 837 | {
|
|---|
| 838 | byte b = *data24++;
|
|---|
| 839 | byte g = *data24++;
|
|---|
| 840 | byte r = *data24++;
|
|---|
| 841 | byte i = nearest_color_via_map(r, g, b, &map, gbmrgb, n_gbmrgb);
|
|---|
| 842 | if ( i )
|
|---|
| 843 | data1[x>>3] |= ( 0x80 >> (x & 7) );
|
|---|
| 844 | }
|
|---|
| 845 | data24 += step_src;
|
|---|
| 846 | data1 += stride_dest;
|
|---|
| 847 | }
|
|---|
| 848 | }
|
|---|
| 849 | /*...e*/
|
|---|
| 850 | /*...sgbm_trunc_4bpp \45\ map to user specified 4bpp palette:0:*/
|
|---|
| 851 | void gbm_trunc_4bpp(
|
|---|
| 852 | const GBM *gbm, const byte *data24, byte *data4,
|
|---|
| 853 | GBMRGB *gbmrgb, int n_gbmrgb
|
|---|
| 854 | )
|
|---|
| 855 | {
|
|---|
| 856 | int stride_src = ((gbm->w * 3 + 3) & ~3);
|
|---|
| 857 | int step_src = stride_src - gbm->w * 3;
|
|---|
| 858 | int stride_dest = ((gbm->w * 4 + 31) / 32) * 4;
|
|---|
| 859 | int step_dest = stride_dest - ((gbm->w * 4)+7)/8;
|
|---|
| 860 | int y;
|
|---|
| 861 | MAP map;
|
|---|
| 862 | build_map(gbmrgb, n_gbmrgb, &map);
|
|---|
| 863 | for ( y = 0; y < gbm->h; y++ )
|
|---|
| 864 | {
|
|---|
| 865 | int x;
|
|---|
| 866 | for ( x = 0; x+1 < gbm->w; x += 2 )
|
|---|
| 867 | {
|
|---|
| 868 | byte b0 = *data24++;
|
|---|
| 869 | byte g0 = *data24++;
|
|---|
| 870 | byte r0 = *data24++;
|
|---|
| 871 | byte i0 = nearest_color_via_map(r0, g0, b0, &map, gbmrgb, n_gbmrgb);
|
|---|
| 872 | byte b1 = *data24++;
|
|---|
| 873 | byte g1 = *data24++;
|
|---|
| 874 | byte r1 = *data24++;
|
|---|
| 875 | byte i1 = nearest_color_via_map(r1, g1, b1, &map, gbmrgb, n_gbmrgb);
|
|---|
| 876 | *data4++ = ( ( i0 << 4 ) | i1 );
|
|---|
| 877 | }
|
|---|
| 878 | if ( gbm->w & 1 )
|
|---|
| 879 | {
|
|---|
| 880 | byte b0 = *data24++;
|
|---|
| 881 | byte g0 = *data24++;
|
|---|
| 882 | byte r0 = *data24++;
|
|---|
| 883 | byte i0 = nearest_color_via_map(r0, g0, b0, &map, gbmrgb, n_gbmrgb);
|
|---|
| 884 | *data4++ = ( i0 << 4 );
|
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| 885 | }
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| 886 | data24 += step_src;
|
|---|
| 887 | data4 += step_dest;
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|---|
| 888 | }
|
|---|
| 889 | }
|
|---|
| 890 | /*...e*/
|
|---|
| 891 | /*...sgbm_trunc_8bpp \45\ map to user specified 8bpp palette:0:*/
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|---|
| 892 | void gbm_trunc_8bpp(
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| 893 | const GBM *gbm, const byte *data24, byte *data8,
|
|---|
| 894 | GBMRGB *gbmrgb, int n_gbmrgb
|
|---|
| 895 | )
|
|---|
| 896 | {
|
|---|
| 897 | int stride_src = ((gbm->w * 3 + 3) & ~3);
|
|---|
| 898 | int step_src = stride_src - gbm->w * 3;
|
|---|
| 899 | int stride_dest = ((gbm->w * 8 + 31) / 32) * 4;
|
|---|
| 900 | int step_dest = stride_dest - gbm->w;
|
|---|
| 901 | int y;
|
|---|
| 902 | MAP map;
|
|---|
| 903 | build_map(gbmrgb, n_gbmrgb, &map);
|
|---|
| 904 | for ( y = 0; y < gbm->h; y++ )
|
|---|
| 905 | {
|
|---|
| 906 | int x;
|
|---|
| 907 | for ( x = 0; x < gbm->w; x++ )
|
|---|
| 908 | {
|
|---|
| 909 | byte b = *data24++;
|
|---|
| 910 | byte g = *data24++;
|
|---|
| 911 | byte r = *data24++;
|
|---|
| 912 | *data8++ = nearest_color_via_map(r, g, b, &map, gbmrgb, n_gbmrgb);
|
|---|
| 913 | }
|
|---|
| 914 | data24 += step_src;
|
|---|
| 915 | data8 += step_dest;
|
|---|
| 916 | }
|
|---|
| 917 | }
|
|---|
| 918 | /*...e*/
|
|---|
