| 1 | /* -*- c-basic-offset: 8 -*-
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| 2 | rdesktop: A Remote Desktop Protocol client.
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| 3 | Bitmap decompression routines
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| 4 | Copyright (C) Matthew Chapman 1999-2007
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| 5 |
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| 6 | This program is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2 of the License, or
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| 9 | (at your option) any later version.
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| 10 |
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| 11 | This program is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | GNU General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with this program; if not, write to the Free Software
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| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 19 | */
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| 20 |
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| 21 | /* three seperate function for speed when decompressing the bitmaps
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| 22 | when modifing one function make the change in the others
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| 23 | [email protected] */
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| 24 |
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| 25 | /* indent is confused by this file */
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| 26 | /* *INDENT-OFF* */
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| 27 |
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| 28 | #include "rdesktop.h"
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| 29 |
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| 30 | #define CVAL(p) (*(p++))
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| 31 | #ifdef NEED_ALIGN
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| 32 | #ifdef L_ENDIAN
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| 33 | #define CVAL2(p, v) { v = (*(p++)); v |= (*(p++)) << 8; }
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| 34 | #else
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| 35 | #define CVAL2(p, v) { v = (*(p++)) << 8; v |= (*(p++)); }
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| 36 | #endif /* L_ENDIAN */
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| 37 | #else
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| 38 | #define CVAL2(p, v) { v = (*((uint16*)p)); p += 2; }
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| 39 | #endif /* NEED_ALIGN */
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| 40 |
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| 41 | #define UNROLL8(exp) { exp exp exp exp exp exp exp exp }
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| 42 |
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| 43 | #define REPEAT(statement) \
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| 44 | { \
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| 45 | while((count & ~0x7) && ((x+8) < width)) \
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| 46 | UNROLL8( statement; count--; x++; ); \
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| 47 | \
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| 48 | while((count > 0) && (x < width)) \
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| 49 | { \
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| 50 | statement; \
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| 51 | count--; \
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| 52 | x++; \
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| 53 | } \
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| 54 | }
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| 55 |
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| 56 | #define MASK_UPDATE() \
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| 57 | { \
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| 58 | mixmask <<= 1; \
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| 59 | if (mixmask == 0) \
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| 60 | { \
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| 61 | mask = fom_mask ? fom_mask : CVAL(input); \
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| 62 | mixmask = 1; \
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| 63 | } \
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| 64 | }
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| 65 |
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| 66 | /* 1 byte bitmap decompress */
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| 67 | static RD_BOOL
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| 68 | bitmap_decompress1(uint8 * output, int width, int height, uint8 * input, int size)
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| 69 | {
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| 70 | uint8 *end = input + size;
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| 71 | uint8 *prevline = NULL, *line = NULL;
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| 72 | int opcode, count, offset, isfillormix, x = width;
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| 73 | int lastopcode = -1, insertmix = False, bicolour = False;
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| 74 | uint8 code;
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| 75 | uint8 colour1 = 0, colour2 = 0;
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| 76 | uint8 mixmask, mask = 0;
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| 77 | uint8 mix = 0xff;
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| 78 | int fom_mask = 0;
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| 79 |
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| 80 | while (input < end)
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| 81 | {
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| 82 | fom_mask = 0;
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| 83 | code = CVAL(input);
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| 84 | opcode = code >> 4;
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| 85 | /* Handle different opcode forms */
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| 86 | switch (opcode)
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| 87 | {
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| 88 | case 0xc:
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| 89 | case 0xd:
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| 90 | case 0xe:
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| 91 | opcode -= 6;
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| 92 | count = code & 0xf;
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| 93 | offset = 16;
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| 94 | break;
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| 95 | case 0xf:
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| 96 | opcode = code & 0xf;
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| 97 | if (opcode < 9)
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| 98 | {
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| 99 | count = CVAL(input);
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| 100 | count |= CVAL(input) << 8;
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| 101 | }
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| 102 | else
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| 103 | {
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| 104 | count = (opcode < 0xb) ? 8 : 1;
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| 105 | }
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| 106 | offset = 0;
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| 107 | break;
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| 108 | default:
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| 109 | opcode >>= 1;
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| 110 | count = code & 0x1f;
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| 111 | offset = 32;
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| 112 | break;
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| 113 | }
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| 114 | /* Handle strange cases for counts */
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| 115 | if (offset != 0)
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| 116 | {
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| 117 | isfillormix = ((opcode == 2) || (opcode == 7));
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| 118 | if (count == 0)
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| 119 | {
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| 120 | if (isfillormix)
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| 121 | count = CVAL(input) + 1;
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| 122 | else
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| 123 | count = CVAL(input) + offset;
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| 124 | }
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| 125 | else if (isfillormix)
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| 126 | {
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| 127 | count <<= 3;
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| 128 | }
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| 129 | }
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| 130 | /* Read preliminary data */
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| 131 | switch (opcode)
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| 132 | {
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| 133 | case 0: /* Fill */
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| 134 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
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| 135 | insertmix = True;
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| 136 | break;
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| 137 | case 8: /* Bicolour */
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| 138 | colour1 = CVAL(input);
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| 139 | case 3: /* Colour */
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| 140 | colour2 = CVAL(input);
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| 141 | break;
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| 142 | case 6: /* SetMix/Mix */
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| 143 | case 7: /* SetMix/FillOrMix */
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| 144 | mix = CVAL(input);
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| 145 | opcode -= 5;
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| 146 | break;
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| 147 | case 9: /* FillOrMix_1 */
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| 148 | mask = 0x03;
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| 149 | opcode = 0x02;
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| 150 | fom_mask = 3;
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| 151 | break;
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| 152 | case 0x0a: /* FillOrMix_2 */
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| 153 | mask = 0x05;
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| 154 | opcode = 0x02;
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| 155 | fom_mask = 5;
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| 156 | break;
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| 157 | }
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| 158 | lastopcode = opcode;
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| 159 | mixmask = 0;
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| 160 | /* Output body */
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| 161 | while (count > 0)
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| 162 | {
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| 163 | if (x >= width)
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| 164 | {
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| 165 | if (height <= 0)
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| 166 | return False;
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| 167 | x = 0;
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| 168 | height--;
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| 169 | prevline = line;
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| 170 | line = output + height * width;
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| 171 | }
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| 172 | switch (opcode)
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| 173 | {
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| 174 | case 0: /* Fill */
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| 175 | if (insertmix)
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| 176 | {
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| 177 | if (prevline == NULL)
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| 178 | line[x] = mix;
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| 179 | else
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| 180 | line[x] = prevline[x] ^ mix;
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| 181 | insertmix = False;
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| 182 | count--;
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| 183 | x++;
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| 184 | }
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| 185 | if (prevline == NULL)
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| 186 | {
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| 187 | REPEAT(line[x] = 0)
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| 188 | }
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| 189 | else
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| 190 | {
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| 191 | REPEAT(line[x] = prevline[x])
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| 192 | }
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| 193 | break;
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| 194 | case 1: /* Mix */
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| 195 | if (prevline == NULL)
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| 196 | {
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| 197 | REPEAT(line[x] = mix)
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| 198 | }
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| 199 | else
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| 200 | {
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| 201 | REPEAT(line[x] = prevline[x] ^ mix)
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| 202 | }
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| 203 | break;
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| 204 | case 2: /* Fill or Mix */
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| 205 | if (prevline == NULL)
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| 206 | {
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| 207 | REPEAT
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| 208 | (
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| 209 | MASK_UPDATE();
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| 210 | if (mask & mixmask)
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| 211 | line[x] = mix;
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| 212 | else
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| 213 | line[x] = 0;
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| 214 | )
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| 215 | }
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| 216 | else
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| 217 | {
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| 218 | REPEAT
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| 219 | (
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| 220 | MASK_UPDATE();
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| 221 | if (mask & mixmask)
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| 222 | line[x] = prevline[x] ^ mix;
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| 223 | else
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| 224 | line[x] = prevline[x];
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| 225 | )
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| 226 | }
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| 227 | break;
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| 228 | case 3: /* Colour */
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| 229 | REPEAT(line[x] = colour2)
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| 230 | break;
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| 231 | case 4: /* Copy */
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| 232 | REPEAT(line[x] = CVAL(input))
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| 233 | break;
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| 234 | case 8: /* Bicolour */
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| 235 | REPEAT
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| 236 | (
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| 237 | if (bicolour)
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| 238 | {
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| 239 | line[x] = colour2;
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| 240 | bicolour = False;
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| 241 | }
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| 242 | else
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| 243 | {
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| 244 | line[x] = colour1;
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| 245 | bicolour = True; count++;
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| 246 | }
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| 247 | )
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| 248 | break;
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| 249 | case 0xd: /* White */
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| 250 | REPEAT(line[x] = 0xff)
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| 251 | break;
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| 252 | case 0xe: /* Black */
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| 253 | REPEAT(line[x] = 0)
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| 254 | break;
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| 255 | default:
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| 256 | unimpl("bitmap opcode 0x%x\n", opcode);
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| 257 | return False;
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| 258 | }
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| 259 | }
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| 260 | }
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| 261 | return True;
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| 262 | }
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| 263 |
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| 264 | /* 2 byte bitmap decompress */
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| 265 | static RD_BOOL
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| 266 | bitmap_decompress2(uint8 * output, int width, int height, uint8 * input, int size)
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| 267 | {
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| 268 | uint8 *end = input + size;
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| 269 | uint16 *prevline = NULL, *line = NULL;
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| 270 | int opcode, count, offset, isfillormix, x = width;
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| 271 | int lastopcode = -1, insertmix = False, bicolour = False;
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| 272 | uint8 code;
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| 273 | uint16 colour1 = 0, colour2 = 0;
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| 274 | uint8 mixmask, mask = 0;
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| 275 | uint16 mix = 0xffff;
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| 276 | int fom_mask = 0;
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| 277 |
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| 278 | while (input < end)
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| 279 | {
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| 280 | fom_mask = 0;
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| 281 | code = CVAL(input);
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| 282 | opcode = code >> 4;
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| 283 | /* Handle different opcode forms */
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| 284 | switch (opcode)
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| 285 | {
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| 286 | case 0xc:
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| 287 | case 0xd:
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| 288 | case 0xe:
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| 289 | opcode -= 6;
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| 290 | count = code & 0xf;
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| 291 | offset = 16;
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| 292 | break;
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| 293 | case 0xf:
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| 294 | opcode = code & 0xf;
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| 295 | if (opcode < 9)
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| 296 | {
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| 297 | count = CVAL(input);
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| 298 | count |= CVAL(input) << 8;
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| 299 | }
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| 300 | else
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| 301 | {
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| 302 | count = (opcode < 0xb) ? 8 : 1;
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| 303 | }
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| 304 | offset = 0;
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| 305 | break;
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| 306 | default:
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| 307 | opcode >>= 1;
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| 308 | count = code & 0x1f;
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| 309 | offset = 32;
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| 310 | break;
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| 311 | }
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| 312 | /* Handle strange cases for counts */
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| 313 | if (offset != 0)
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| 314 | {
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| 315 | isfillormix = ((opcode == 2) || (opcode == 7));
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| 316 | if (count == 0)
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| 317 | {
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| 318 | if (isfillormix)
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| 319 | count = CVAL(input) + 1;
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| 320 | else
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| 321 | count = CVAL(input) + offset;
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| 322 | }
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| 323 | else if (isfillormix)
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| 324 | {
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| 325 | count <<= 3;
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| 326 | }
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| 327 | }
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| 328 | /* Read preliminary data */
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| 329 | switch (opcode)
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| 330 | {
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| 331 | case 0: /* Fill */
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| 332 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
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| 333 | insertmix = True;
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| 334 | break;
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| 335 | case 8: /* Bicolour */
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| 336 | CVAL2(input, colour1);
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| 337 | case 3: /* Colour */
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| 338 | CVAL2(input, colour2);
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| 339 | break;
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| 340 | case 6: /* SetMix/Mix */
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| 341 | case 7: /* SetMix/FillOrMix */
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| 342 | CVAL2(input, mix);
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| 343 | opcode -= 5;
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| 344 | break;
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| 345 | case 9: /* FillOrMix_1 */
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| 346 | mask = 0x03;
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| 347 | opcode = 0x02;
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| 348 | fom_mask = 3;
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| 349 | break;
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| 350 | case 0x0a: /* FillOrMix_2 */
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| 351 | mask = 0x05;
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| 352 | opcode = 0x02;
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| 353 | fom_mask = 5;
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| 354 | break;
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| 355 | }
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| 356 | lastopcode = opcode;
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| 357 | mixmask = 0;
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| 358 | /* Output body */
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| 359 | while (count > 0)
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| 360 | {
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| 361 | if (x >= width)
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| 362 | {
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| 363 | if (height <= 0)
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| 364 | return False;
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| 365 | x = 0;
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| 366 | height--;
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| 367 | prevline = line;
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| 368 | line = ((uint16 *) output) + height * width;
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| 369 | }
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| 370 | switch (opcode)
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| 371 | {
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| 372 | case 0: /* Fill */
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| 373 | if (insertmix)
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| 374 | {
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| 375 | if (prevline == NULL)
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| 376 | line[x] = mix;
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| 377 | else
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| 378 | line[x] = prevline[x] ^ mix;
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| 379 | insertmix = False;
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| 380 | count--;
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| 381 | x++;
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| 382 | }
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| 383 | if (prevline == NULL)
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| 384 | {
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| 385 | REPEAT(line[x] = 0)
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| 386 | }
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| 387 | else
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| 388 | {
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| 389 | REPEAT(line[x] = prevline[x])
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| 390 | }
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| 391 | break;
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| 392 | case 1: /* Mix */
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| 393 | if (prevline == NULL)
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| 394 | {
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| 395 | REPEAT(line[x] = mix)
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| 396 | }
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| 397 | else
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| 398 | {
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| 399 | REPEAT(line[x] = prevline[x] ^ mix)
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| 400 | }
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| 401 | break;
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| 402 | case 2: /* Fill or Mix */
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| 403 | if (prevline == NULL)
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| 404 | {
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| 405 | REPEAT
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| 406 | (
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| 407 | MASK_UPDATE();
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| 408 | if (mask & mixmask)
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| 409 | line[x] = mix;
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| 410 | else
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| 411 | line[x] = 0;
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| 412 | )
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| 413 | }
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| 414 | else
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| 415 | {
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| 416 | REPEAT
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| 417 | (
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| 418 | MASK_UPDATE();
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| 419 | if (mask & mixmask)
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| 420 | line[x] = prevline[x] ^ mix;
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| 421 | else
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| 422 | line[x] = prevline[x];
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| 423 | )
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| 424 | }
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| 425 | break;
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| 426 | case 3: /* Colour */
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| 427 | REPEAT(line[x] = colour2)
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| 428 | break;
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| 429 | case 4: /* Copy */
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| 430 | REPEAT(CVAL2(input, line[x]))
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| 431 | break;
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| 432 | case 8: /* Bicolour */
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| 433 | REPEAT
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| 434 | (
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| 435 | if (bicolour)
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| 436 | {
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| 437 | line[x] = colour2;
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| 438 | bicolour = False;
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| 439 | }
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| 440 | else
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| 441 | {
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| 442 | line[x] = colour1;
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| 443 | bicolour = True;
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| 444 | count++;
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| 445 | }
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| 446 | )
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| 447 | break;
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| 448 | case 0xd: /* White */
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| 449 | REPEAT(line[x] = 0xffff)
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| 450 | break;
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| 451 | case 0xe: /* Black */
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| 452 | REPEAT(line[x] = 0)
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| 453 | break;
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| 454 | default:
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| 455 | unimpl("bitmap opcode 0x%x\n", opcode);
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| 456 | return False;
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| 457 | }
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| 458 | }
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| 459 | }
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| 460 | return True;
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| 461 | }
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| 462 |
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| 463 | /* 3 byte bitmap decompress */
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|---|
| 464 | static RD_BOOL
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| 465 | bitmap_decompress3(uint8 * output, int width, int height, uint8 * input, int size)
|
|---|
| 466 | {
|
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| 467 | uint8 *end = input + size;
|
|---|
| 468 | uint8 *prevline = NULL, *line = NULL;
|
|---|
| 469 | int opcode, count, offset, isfillormix, x = width;
|
|---|
| 470 | int lastopcode = -1, insertmix = False, bicolour = False;
|
|---|
| 471 | uint8 code;
|
|---|
| 472 | uint8 colour1[3] = {0, 0, 0}, colour2[3] = {0, 0, 0};
|
|---|
| 473 | uint8 mixmask, mask = 0;
|
|---|
| 474 | uint8 mix[3] = {0xff, 0xff, 0xff};
|
|---|
| 475 | int fom_mask = 0;
|
|---|
| 476 |
|
|---|
| 477 | while (input < end)
|
|---|
| 478 | {
|
|---|
| 479 | fom_mask = 0;
|
|---|
| 480 | code = CVAL(input);
|
|---|
| 481 | opcode = code >> 4;
|
|---|
| 482 | /* Handle different opcode forms */
|
|---|
| 483 | switch (opcode)
|
|---|
| 484 | {
|
|---|
| 485 | case 0xc:
|
|---|
| 486 | case 0xd:
|
|---|
| 487 | case 0xe:
|
|---|
| 488 | opcode -= 6;
|
|---|
| 489 | count = code & 0xf;
|
|---|
| 490 | offset = 16;
|
|---|
| 491 | break;
|
|---|
| 492 | case 0xf:
|
|---|
| 493 | opcode = code & 0xf;
|
|---|
| 494 | if (opcode < 9)
|
|---|
| 495 | {
|
|---|
| 496 | count = CVAL(input);
|
|---|
| 497 | count |= CVAL(input) << 8;
|
|---|
| 498 | }
|
|---|
| 499 | else
|
|---|
| 500 | {
|
|---|
| 501 | count = (opcode <
|
|---|
| 502 | 0xb) ? 8 : 1;
|
|---|
| 503 | }
|
|---|
| 504 | offset = 0;
|
|---|
| 505 | break;
|
|---|
| 506 | default:
|
|---|
| 507 | opcode >>= 1;
|
|---|
| 508 | count = code & 0x1f;
|
|---|
| 509 | offset = 32;
|
|---|
| 510 | break;
|
|---|
| 511 | }
|
|---|
| 512 | /* Handle strange cases for counts */
|
|---|
| 513 | if (offset != 0)
|
|---|
| 514 | {
|
|---|
| 515 | isfillormix = ((opcode == 2) || (opcode == 7));
|
|---|
| 516 | if (count == 0)
|
|---|
| 517 | {
|
|---|
| 518 | if (isfillormix)
|
|---|
| 519 | count = CVAL(input) + 1;
|
|---|
| 520 | else
|
|---|
| 521 | count = CVAL(input) + offset;
|
|---|
| 522 | }
|
|---|
| 523 | else if (isfillormix)
|
|---|
| 524 | {
|
|---|
| 525 | count <<= 3;
|
|---|
| 526 | }
|
|---|
| 527 | }
|
|---|
| 528 | /* Read preliminary data */
|
|---|
| 529 | switch (opcode)
|
|---|
| 530 | {
|
|---|
| 531 | case 0: /* Fill */
|
|---|
| 532 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
|
|---|
| 533 | insertmix = True;
|
|---|
| 534 | break;
|
|---|
| 535 | case 8: /* Bicolour */
|
|---|
| 536 | colour1[0] = CVAL(input);
|
|---|
| 537 | colour1[1] = CVAL(input);
|
|---|
| 538 | colour1[2] = CVAL(input);
|
|---|
| 539 | case 3: /* Colour */
|
|---|
| 540 | colour2[0] = CVAL(input);
|
|---|
| 541 | colour2[1] = CVAL(input);
|
|---|
| 542 | colour2[2] = CVAL(input);
|
|---|
| 543 | break;
|
|---|
| 544 | case 6: /* SetMix/Mix */
|
|---|
| 545 | case 7: /* SetMix/FillOrMix */
|
|---|
| 546 | mix[0] = CVAL(input);
|
|---|
| 547 | mix[1] = CVAL(input);
|
|---|
| 548 | mix[2] = CVAL(input);
|
|---|
| 549 | opcode -= 5;
|
|---|
| 550 | break;
|
|---|
| 551 | case 9: /* FillOrMix_1 */
|
|---|
| 552 | mask = 0x03;
|
|---|
| 553 | opcode = 0x02;
|
|---|
| 554 | fom_mask = 3;
|
|---|
| 555 | break;
|
|---|
| 556 | case 0x0a: /* FillOrMix_2 */
|
|---|
| 557 | mask = 0x05;
|
|---|
| 558 | opcode = 0x02;
|
|---|
| 559 | fom_mask = 5;
|
|---|
| 560 | break;
|
|---|
| 561 | }
|
|---|
| 562 | lastopcode = opcode;
|
|---|
| 563 | mixmask = 0;
|
|---|
| 564 | /* Output body */
|
|---|
| 565 | while (count > 0)
|
|---|
| 566 | {
|
|---|
| 567 | if (x >= width)
|
|---|
| 568 | {
|
|---|
| 569 | if (height <= 0)
|
|---|
| 570 | return False;
|
|---|
| 571 | x = 0;
|
|---|
| 572 | height--;
|
|---|
| 573 | prevline = line;
|
|---|
| 574 | line = output + height * (width * 3);
|
|---|
| 575 | }
|
|---|
| 576 | switch (opcode)
|
|---|
| 577 | {
|
|---|
| 578 | case 0: /* Fill */
|
|---|
| 579 | if (insertmix)
|
|---|
| 580 | {
|
|---|
| 581 | if (prevline == NULL)
|
|---|
| 582 | {
|
|---|
| 583 | line[x * 3] = mix[0];
|
|---|
| 584 | line[x * 3 + 1] = mix[1];
|
|---|
| 585 | line[x * 3 + 2] = mix[2];
|
|---|
| 586 | }
|
|---|
| 587 | else
|
|---|
| 588 | {
|
|---|
| 589 | line[x * 3] =
|
|---|
| 590 | prevline[x * 3] ^ mix[0];
|
|---|
| 591 | line[x * 3 + 1] =
|
|---|
| 592 | prevline[x * 3 + 1] ^ mix[1];
|
|---|
| 593 | line[x * 3 + 2] =
|
|---|
| 594 | prevline[x * 3 + 2] ^ mix[2];
|
|---|
| 595 | }
|
|---|
| 596 | insertmix = False;
|
|---|
| 597 | count--;
|
|---|
| 598 | x++;
|
|---|
| 599 | }
|
|---|
| 600 | if (prevline == NULL)
|
|---|
| 601 | {
|
|---|
| 602 | REPEAT
|
|---|
| 603 | (
|
|---|
| 604 | line[x * 3] = 0;
|
|---|
| 605 | line[x * 3 + 1] = 0;
|
|---|
| 606 | line[x * 3 + 2] = 0;
|
|---|
| 607 | )
|
|---|
| 608 | }
|
|---|
| 609 | else
|
|---|
| 610 | {
|
|---|
| 611 | REPEAT
|
|---|
| 612 | (
|
|---|
| 613 | line[x * 3] = prevline[x * 3];
|
|---|
| 614 | line[x * 3 + 1] = prevline[x * 3 + 1];
|
|---|
| 615 | line[x * 3 + 2] = prevline[x * 3 + 2];
|
|---|
| 616 | )
|
|---|
| 617 | }
|
|---|
| 618 | break;
|
|---|
| 619 | case 1: /* Mix */
|
|---|
| 620 | if (prevline == NULL)
|
|---|
| 621 | {
|
|---|
| 622 | REPEAT
|
|---|
| 623 | (
|
|---|
| 624 | line[x * 3] = mix[0];
|
|---|
| 625 | line[x * 3 + 1] = mix[1];
|
|---|
| 626 | line[x * 3 + 2] = mix[2];
|
|---|
| 627 | )
|
|---|
| 628 | }
|
|---|
| 629 | else
|
|---|
| 630 | {
|
|---|
| 631 | REPEAT
|
|---|
| 632 | (
|
|---|
| 633 | line[x * 3] =
|
|---|
| 634 | prevline[x * 3] ^ mix[0];
|
|---|
| 635 | line[x * 3 + 1] =
|
|---|
| 636 | prevline[x * 3 + 1] ^ mix[1];
|
|---|
| 637 | line[x * 3 + 2] =
|
|---|
| 638 | prevline[x * 3 + 2] ^ mix[2];
|
|---|
| 639 | )
|
|---|
| 640 | }
|
|---|
| 641 | break;
|
|---|
| 642 | case 2: /* Fill or Mix */
|
|---|
| 643 | if (prevline == NULL)
|
|---|
| 644 | {
|
|---|
| 645 | REPEAT
|
|---|
| 646 | (
|
|---|
| 647 | MASK_UPDATE();
|
|---|
| 648 | if (mask & mixmask)
|
|---|
| 649 | {
|
|---|
| 650 | line[x * 3] = mix[0];
|
|---|
| 651 | line[x * 3 + 1] = mix[1];
|
|---|
| 652 | line[x * 3 + 2] = mix[2];
|
|---|
| 653 | }
|
|---|
| 654 | else
|
|---|
| 655 | {
|
|---|
| 656 | line[x * 3] = 0;
|
|---|
| 657 | line[x * 3 + 1] = 0;
|
|---|
| 658 | line[x * 3 + 2] = 0;
|
|---|
| 659 | }
|
|---|
| 660 | )
|
|---|
| 661 | }
|
|---|
| 662 | else
|
|---|
| 663 | {
|
|---|
| 664 | REPEAT
|
|---|
| 665 | (
|
|---|
| 666 | MASK_UPDATE();
|
|---|
| 667 | if (mask & mixmask)
|
|---|
| 668 | {
|
|---|
| 669 | line[x * 3] =
|
|---|
| 670 | prevline[x * 3] ^ mix [0];
|
|---|
| 671 | line[x * 3 + 1] =
|
|---|
| 672 | prevline[x * 3 + 1] ^ mix [1];
|
|---|
| 673 | line[x * 3 + 2] =
|
|---|
| 674 | prevline[x * 3 + 2] ^ mix [2];
|
|---|
| 675 | }
|
|---|
| 676 | else
|
|---|
| 677 | {
|
|---|
| 678 | line[x * 3] =
|
|---|
| 679 | prevline[x * 3];
|
|---|
| 680 | line[x * 3 + 1] =
|
|---|
| 681 | prevline[x * 3 + 1];
|
|---|
| 682 | line[x * 3 + 2] =
|
|---|
| 683 | prevline[x * 3 + 2];
|
|---|
| 684 | }
|
|---|
| 685 | )
|
|---|
| 686 | }
|
|---|
| 687 | break;
|
|---|
| 688 | case 3: /* Colour */
|
|---|
| 689 | REPEAT
|
|---|
| 690 | (
|
|---|
| 691 | line[x * 3] = colour2 [0];
|
|---|
| 692 | line[x * 3 + 1] = colour2 [1];
|
|---|
| 693 | line[x * 3 + 2] = colour2 [2];
|
|---|
| 694 | )
|
|---|
| 695 | break;
|
|---|
| 696 | case 4: /* Copy */
|
|---|
| 697 | REPEAT
|
|---|
| 698 | (
|
|---|
| 699 | line[x * 3] = CVAL(input);
|
|---|
| 700 | line[x * 3 + 1] = CVAL(input);
|
|---|
| 701 | line[x * 3 + 2] = CVAL(input);
|
|---|
| 702 | )
|
|---|
| 703 | break;
|
|---|
| 704 | case 8: /* Bicolour */
|
|---|
| 705 | REPEAT
|
|---|
| 706 | (
|
|---|
| 707 | if (bicolour)
|
|---|
| 708 | {
|
|---|
| 709 | line[x * 3] = colour2[0];
|
|---|
| 710 | line[x * 3 + 1] = colour2[1];
|
|---|
| 711 | line[x * 3 + 2] = colour2[2];
|
|---|
| 712 | bicolour = False;
|
|---|
| 713 | }
|
|---|
| 714 | else
|
|---|
| 715 | {
|
|---|
| 716 | line[x * 3] = colour1[0];
|
|---|
| 717 | line[x * 3 + 1] = colour1[1];
|
|---|
| 718 | line[x * 3 + 2] = colour1[2];
|
|---|
| 719 | bicolour = True;
|
|---|
| 720 | count++;
|
|---|
| 721 | }
|
|---|
| 722 | )
|
|---|
| 723 | break;
|
|---|
| 724 | case 0xd: /* White */
|
|---|
| 725 | REPEAT
|
|---|
| 726 | (
|
|---|
| 727 | line[x * 3] = 0xff;
|
|---|
| 728 | line[x * 3 + 1] = 0xff;
|
|---|
| 729 | line[x * 3 + 2] = 0xff;
|
|---|
| 730 | )
|
|---|
| 731 | break;
|
|---|
| 732 | case 0xe: /* Black */
|
|---|
| 733 | REPEAT
|
|---|
| 734 | (
|
|---|
| 735 | line[x * 3] = 0;
|
|---|
| 736 | line[x * 3 + 1] = 0;
|
|---|
| 737 | line[x * 3 + 2] = 0;
|
|---|
| 738 | )
|
|---|
| 739 | break;
|
|---|
| 740 | default:
|
|---|
| 741 | unimpl("bitmap opcode 0x%x\n", opcode);
|
|---|
| 742 | return False;
|
|---|
| 743 | }
|
|---|
| 744 | }
|
|---|
| 745 | }
|
|---|
| 746 | return True;
|
|---|
| 747 | }
|
|---|
| 748 |
|
|---|
| 749 | /* decompress a colour plane */
|
|---|
| 750 | static int
|
|---|
| 751 | process_plane(uint8 * in, int width, int height, uint8 * out, int size)
|
|---|
| 752 | {
|
|---|
| 753 | int indexw;
|
|---|
| 754 | int indexh;
|
|---|
| 755 | int code;
|
|---|
| 756 | int collen;
|
|---|
| 757 | int replen;
|
|---|
| 758 | int color;
|
|---|
| 759 | int x;
|
|---|
| 760 | int revcode;
|
|---|
| 761 | uint8 * last_line;
|
|---|
| 762 | uint8 * this_line;
|
|---|
| 763 | uint8 * org_in;
|
|---|
| 764 | uint8 * org_out;
|
|---|
| 765 |
|
|---|
| 766 | org_in = in;
|
|---|
| 767 | org_out = out;
|
|---|
| 768 | last_line = 0;
|
|---|
| 769 | indexh = 0;
|
|---|
| 770 | while (indexh < height)
|
|---|
| 771 | {
|
|---|
| 772 | out = (org_out + width * height * 4) - ((indexh + 1) * width * 4);
|
|---|
| 773 | color = 0;
|
|---|
| 774 | this_line = out;
|
|---|
| 775 | indexw = 0;
|
|---|
| 776 | if (last_line == 0)
|
|---|
| 777 | {
|
|---|
| 778 | while (indexw < width)
|
|---|
| 779 | {
|
|---|
| 780 | code = CVAL(in);
|
|---|
| 781 | replen = code & 0xf;
|
|---|
| 782 | collen = (code >> 4) & 0xf;
|
|---|
| 783 | revcode = (replen << 4) | collen;
|
|---|
| 784 | if ((revcode <= 47) && (revcode >= 16))
|
|---|
| 785 | {
|
|---|
| 786 | replen = revcode;
|
|---|
| 787 | collen = 0;
|
|---|
| 788 | }
|
|---|
| 789 | while (collen > 0)
|
|---|
| 790 | {
|
|---|
| 791 | color = CVAL(in);
|
|---|
| 792 | *out = color;
|
|---|
| 793 | out += 4;
|
|---|
| 794 | indexw++;
|
|---|
| 795 | collen--;
|
|---|
| 796 | }
|
|---|
| 797 | while (replen > 0)
|
|---|
| 798 | {
|
|---|
| 799 | *out = color;
|
|---|
| 800 | out += 4;
|
|---|
| 801 | indexw++;
|
|---|
| 802 | replen--;
|
|---|
| 803 | }
|
|---|
| 804 | }
|
|---|
| 805 | }
|
|---|
| 806 | else
|
|---|
| 807 | {
|
|---|
| 808 | while (indexw < width)
|
|---|
| 809 | {
|
|---|
| 810 | code = CVAL(in);
|
|---|
| 811 | replen = code & 0xf;
|
|---|
| 812 | collen = (code >> 4) & 0xf;
|
|---|
| 813 | revcode = (replen << 4) | collen;
|
|---|
| 814 | if ((revcode <= 47) && (revcode >= 16))
|
|---|
| 815 | {
|
|---|
| 816 | replen = revcode;
|
|---|
| 817 | collen = 0;
|
|---|
| 818 | }
|
|---|
| 819 | while (collen > 0)
|
|---|
| 820 | {
|
|---|
| 821 | x = CVAL(in);
|
|---|
| 822 | if (x & 1)
|
|---|
| 823 | {
|
|---|
| 824 | x = x >> 1;
|
|---|
| 825 | x = x + 1;
|
|---|
| 826 | color = -x;
|
|---|
| 827 | }
|
|---|
| 828 | else
|
|---|
| 829 | {
|
|---|
| 830 | x = x >> 1;
|
|---|
| 831 | color = x;
|
|---|
| 832 | }
|
|---|
| 833 | x = last_line[indexw * 4] + color;
|
|---|
| 834 | *out = x;
|
|---|
| 835 | out += 4;
|
|---|
| 836 | indexw++;
|
|---|
| 837 | collen--;
|
|---|
| 838 | }
|
|---|
| 839 | while (replen > 0)
|
|---|
| 840 | {
|
|---|
| 841 | x = last_line[indexw * 4] + color;
|
|---|
| 842 | *out = x;
|
|---|
| 843 | out += 4;
|
|---|
| 844 | indexw++;
|
|---|
| 845 | replen--;
|
|---|
| 846 | }
|
|---|
| 847 | }
|
|---|
| 848 | }
|
|---|
| 849 | indexh++;
|
|---|
| 850 | last_line = this_line;
|
|---|
| 851 | }
|
|---|
| 852 | return (int) (in - org_in);
|
|---|
| 853 | }
|
|---|
| 854 |
|
|---|
| 855 | /* 4 byte bitmap decompress */
|
|---|
| 856 | static RD_BOOL
|
|---|
| 857 | bitmap_decompress4(uint8 * output, int width, int height, uint8 * input, int size)
|
|---|
| 858 | {
|
|---|
| 859 | int code;
|
|---|
| 860 | int bytes_pro;
|
|---|
| 861 | int total_pro;
|
|---|
| 862 |
|
|---|
| 863 | code = CVAL(input);
|
|---|
| 864 | if (code != 0x10)
|
|---|
| 865 | {
|
|---|
| 866 | return False;
|
|---|
| 867 | }
|
|---|
| 868 | total_pro = 1;
|
|---|
| 869 | bytes_pro = process_plane(input, width, height, output + 3, size - total_pro);
|
|---|
| 870 | total_pro += bytes_pro;
|
|---|
| 871 | input += bytes_pro;
|
|---|
| 872 | bytes_pro = process_plane(input, width, height, output + 2, size - total_pro);
|
|---|
| 873 | total_pro += bytes_pro;
|
|---|
| 874 | input += bytes_pro;
|
|---|
| 875 | bytes_pro = process_plane(input, width, height, output + 1, size - total_pro);
|
|---|
| 876 | total_pro += bytes_pro;
|
|---|
| 877 | input += bytes_pro;
|
|---|
| 878 | bytes_pro = process_plane(input, width, height, output + 0, size - total_pro);
|
|---|
| 879 | total_pro += bytes_pro;
|
|---|
| 880 | return size == total_pro;
|
|---|
| 881 | }
|
|---|
| 882 |
|
|---|
| 883 | /* main decompress function */
|
|---|
| 884 | RD_BOOL
|
|---|
| 885 | bitmap_decompress(uint8 * output, int width, int height, uint8 * input, int size, int Bpp)
|
|---|
| 886 | {
|
|---|
| 887 | RD_BOOL rv = False;
|
|---|
| 888 |
|
|---|
| 889 | switch (Bpp)
|
|---|
| 890 | {
|
|---|
| 891 | case 1:
|
|---|
| 892 | rv = bitmap_decompress1(output, width, height, input, size);
|
|---|
| 893 | break;
|
|---|
| 894 | case 2:
|
|---|
| 895 | rv = bitmap_decompress2(output, width, height, input, size);
|
|---|
| 896 | break;
|
|---|
| 897 | case 3:
|
|---|
| 898 | rv = bitmap_decompress3(output, width, height, input, size);
|
|---|
| 899 | break;
|
|---|
| 900 | case 4:
|
|---|
| 901 | rv = bitmap_decompress4(output, width, height, input, size);
|
|---|
| 902 | break;
|
|---|
| 903 | default:
|
|---|
| 904 | unimpl("Bpp %d\n", Bpp);
|
|---|
| 905 | break;
|
|---|
| 906 | }
|
|---|
| 907 | return rv;
|
|---|
| 908 | }
|
|---|
| 909 |
|
|---|
| 910 | /* *INDENT-ON* */
|
|---|
