| 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 <matthewc.unsw.edu.au> 1999-2008
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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 3 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, see <http://www.gnu.org/licenses/>.
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| 18 | */
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| 19 |
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| 20 | /* three seperate function for speed when decompressing the bitmaps
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| 21 | when modifing one function make the change in the others
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| 22 | [email protected] */
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| 23 |
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| 24 | /* indent is confused by this file */
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| 25 | /* *INDENT-OFF* */
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| 26 |
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| 27 | #include "rdesktop.h"
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| 28 |
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| 29 | #define CVAL(p) (*(p++))
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| 30 | #ifdef NEED_ALIGN
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| 31 | #ifdef L_ENDIAN
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| 32 | #define CVAL2(p, v) { v = (*(p++)); v |= (*(p++)) << 8; }
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| 33 | #else
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| 34 | #define CVAL2(p, v) { v = (*(p++)) << 8; v |= (*(p++)); }
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| 35 | #endif /* L_ENDIAN */
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| 36 | #else
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| 37 | #define CVAL2(p, v) { v = (*((uint16*)p)); p += 2; }
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| 38 | #endif /* NEED_ALIGN */
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| 39 |
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| 40 | #define UNROLL8(exp) { exp exp exp exp exp exp exp exp }
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| 41 |
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| 42 | #define REPEAT(statement) \
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| 43 | { \
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| 44 | while((count & ~0x7) && ((x+8) < width)) \
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| 45 | UNROLL8( statement; count--; x++; ); \
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| 46 | \
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| 47 | while((count > 0) && (x < width)) \
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| 48 | { \
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| 49 | statement; \
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| 50 | count--; \
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| 51 | x++; \
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| 52 | } \
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| 53 | }
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| 54 |
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| 55 | #define MASK_UPDATE() \
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| 56 | { \
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| 57 | mixmask <<= 1; \
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| 58 | if (mixmask == 0) \
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| 59 | { \
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| 60 | mask = fom_mask ? fom_mask : CVAL(input); \
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| 61 | mixmask = 1; \
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| 62 | } \
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| 63 | }
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| 64 |
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| 65 | /* 1 byte bitmap decompress */
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| 66 | static RD_BOOL
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| 67 | bitmap_decompress1(uint8 * output, int width, int height, uint8 * input, int size)
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| 68 | {
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| 69 | uint8 *end = input + size;
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| 70 | uint8 *prevline = NULL, *line = NULL;
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| 71 | int opcode, count, offset, isfillormix, x = width;
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| 72 | int lastopcode = -1, insertmix = False, bicolour = False;
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| 73 | uint8 code;
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| 74 | uint8 colour1 = 0, colour2 = 0;
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| 75 | uint8 mixmask, mask = 0;
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| 76 | uint8 mix = 0xff;
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| 77 | int fom_mask = 0;
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| 78 |
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| 79 | while (input < end)
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| 80 | {
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| 81 | fom_mask = 0;
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| 82 | code = CVAL(input);
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| 83 | opcode = code >> 4;
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| 84 | /* Handle different opcode forms */
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| 85 | switch (opcode)
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| 86 | {
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| 87 | case 0xc:
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| 88 | case 0xd:
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| 89 | case 0xe:
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| 90 | opcode -= 6;
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| 91 | count = code & 0xf;
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| 92 | offset = 16;
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| 93 | break;
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| 94 | case 0xf:
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| 95 | opcode = code & 0xf;
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| 96 | if (opcode < 9)
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| 97 | {
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| 98 | count = CVAL(input);
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| 99 | count |= CVAL(input) << 8;
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| 100 | }
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| 101 | else
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| 102 | {
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| 103 | count = (opcode < 0xb) ? 8 : 1;
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| 104 | }
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| 105 | offset = 0;
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| 106 | break;
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| 107 | default:
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| 108 | opcode >>= 1;
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| 109 | count = code & 0x1f;
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| 110 | offset = 32;
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| 111 | break;
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| 112 | }
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| 113 | /* Handle strange cases for counts */
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| 114 | if (offset != 0)
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| 115 | {
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| 116 | isfillormix = ((opcode == 2) || (opcode == 7));
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| 117 | if (count == 0)
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| 118 | {
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| 119 | if (isfillormix)
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| 120 | count = CVAL(input) + 1;
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| 121 | else
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| 122 | count = CVAL(input) + offset;
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| 123 | }
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| 124 | else if (isfillormix)
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| 125 | {
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| 126 | count <<= 3;
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| 127 | }
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| 128 | }
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| 129 | /* Read preliminary data */
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| 130 | switch (opcode)
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| 131 | {
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| 132 | case 0: /* Fill */
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| 133 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
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| 134 | insertmix = True;
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| 135 | break;
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| 136 | case 8: /* Bicolour */
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| 137 | colour1 = CVAL(input);
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| 138 | case 3: /* Colour */
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| 139 | colour2 = CVAL(input);
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| 140 | break;
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| 141 | case 6: /* SetMix/Mix */
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| 142 | case 7: /* SetMix/FillOrMix */
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| 143 | mix = CVAL(input);
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| 144 | opcode -= 5;
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| 145 | break;
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| 146 | case 9: /* FillOrMix_1 */
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| 147 | mask = 0x03;
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| 148 | opcode = 0x02;
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| 149 | fom_mask = 3;
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| 150 | break;
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| 151 | case 0x0a: /* FillOrMix_2 */
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| 152 | mask = 0x05;
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| 153 | opcode = 0x02;
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| 154 | fom_mask = 5;
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| 155 | break;
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| 156 | }
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| 157 | lastopcode = opcode;
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| 158 | mixmask = 0;
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| 159 | /* Output body */
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| 160 | while (count > 0)
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| 161 | {
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| 162 | if (x >= width)
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| 163 | {
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| 164 | if (height <= 0)
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| 165 | return False;
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| 166 | x = 0;
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| 167 | height--;
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| 168 | prevline = line;
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| 169 | line = output + height * width;
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| 170 | }
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| 171 | switch (opcode)
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| 172 | {
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| 173 | case 0: /* Fill */
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| 174 | if (insertmix)
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| 175 | {
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| 176 | if (prevline == NULL)
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| 177 | line[x] = mix;
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| 178 | else
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| 179 | line[x] = prevline[x] ^ mix;
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| 180 | insertmix = False;
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| 181 | count--;
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| 182 | x++;
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| 183 | }
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| 184 | if (prevline == NULL)
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| 185 | {
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| 186 | REPEAT(line[x] = 0)
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| 187 | }
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| 188 | else
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| 189 | {
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| 190 | REPEAT(line[x] = prevline[x])
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| 191 | }
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| 192 | break;
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| 193 | case 1: /* Mix */
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| 194 | if (prevline == NULL)
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| 195 | {
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| 196 | REPEAT(line[x] = mix)
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| 197 | }
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| 198 | else
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| 199 | {
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| 200 | REPEAT(line[x] = prevline[x] ^ mix)
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| 201 | }
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| 202 | break;
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| 203 | case 2: /* Fill or Mix */
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| 204 | if (prevline == NULL)
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| 205 | {
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| 206 | REPEAT
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| 207 | (
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| 208 | MASK_UPDATE();
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| 209 | if (mask & mixmask)
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| 210 | line[x] = mix;
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| 211 | else
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| 212 | line[x] = 0;
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| 213 | )
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| 214 | }
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| 215 | else
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| 216 | {
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| 217 | REPEAT
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| 218 | (
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| 219 | MASK_UPDATE();
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| 220 | if (mask & mixmask)
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| 221 | line[x] = prevline[x] ^ mix;
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| 222 | else
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| 223 | line[x] = prevline[x];
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| 224 | )
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| 225 | }
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| 226 | break;
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| 227 | case 3: /* Colour */
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| 228 | REPEAT(line[x] = colour2)
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| 229 | break;
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| 230 | case 4: /* Copy */
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| 231 | REPEAT(line[x] = CVAL(input))
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| 232 | break;
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| 233 | case 8: /* Bicolour */
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| 234 | REPEAT
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| 235 | (
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| 236 | if (bicolour)
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| 237 | {
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| 238 | line[x] = colour2;
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| 239 | bicolour = False;
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| 240 | }
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| 241 | else
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| 242 | {
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| 243 | line[x] = colour1;
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| 244 | bicolour = True; count++;
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| 245 | }
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| 246 | )
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| 247 | break;
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| 248 | case 0xd: /* White */
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| 249 | REPEAT(line[x] = 0xff)
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| 250 | break;
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| 251 | case 0xe: /* Black */
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| 252 | REPEAT(line[x] = 0)
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| 253 | break;
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| 254 | default:
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| 255 | unimpl("bitmap opcode 0x%x\n", opcode);
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| 256 | return False;
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| 257 | }
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| 258 | }
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| 259 | }
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| 260 | return True;
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| 261 | }
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| 262 |
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| 263 | /* 2 byte bitmap decompress */
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| 264 | static RD_BOOL
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| 265 | bitmap_decompress2(uint8 * output, int width, int height, uint8 * input, int size)
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| 266 | {
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| 267 | uint8 *end = input + size;
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| 268 | uint16 *prevline = NULL, *line = NULL;
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| 269 | int opcode, count, offset, isfillormix, x = width;
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| 270 | int lastopcode = -1, insertmix = False, bicolour = False;
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| 271 | uint8 code;
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| 272 | uint16 colour1 = 0, colour2 = 0;
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| 273 | uint8 mixmask, mask = 0;
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| 274 | uint16 mix = 0xffff;
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| 275 | int fom_mask = 0;
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| 276 |
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| 277 | while (input < end)
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| 278 | {
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| 279 | fom_mask = 0;
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| 280 | code = CVAL(input);
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| 281 | opcode = code >> 4;
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| 282 | /* Handle different opcode forms */
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| 283 | switch (opcode)
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| 284 | {
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| 285 | case 0xc:
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| 286 | case 0xd:
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| 287 | case 0xe:
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| 288 | opcode -= 6;
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| 289 | count = code & 0xf;
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| 290 | offset = 16;
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| 291 | break;
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| 292 | case 0xf:
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| 293 | opcode = code & 0xf;
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| 294 | if (opcode < 9)
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| 295 | {
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| 296 | count = CVAL(input);
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| 297 | count |= CVAL(input) << 8;
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| 298 | }
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| 299 | else
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| 300 | {
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| 301 | count = (opcode < 0xb) ? 8 : 1;
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| 302 | }
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| 303 | offset = 0;
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| 304 | break;
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| 305 | default:
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| 306 | opcode >>= 1;
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| 307 | count = code & 0x1f;
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| 308 | offset = 32;
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| 309 | break;
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| 310 | }
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| 311 | /* Handle strange cases for counts */
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| 312 | if (offset != 0)
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| 313 | {
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| 314 | isfillormix = ((opcode == 2) || (opcode == 7));
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| 315 | if (count == 0)
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| 316 | {
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| 317 | if (isfillormix)
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| 318 | count = CVAL(input) + 1;
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| 319 | else
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| 320 | count = CVAL(input) + offset;
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| 321 | }
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| 322 | else if (isfillormix)
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| 323 | {
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| 324 | count <<= 3;
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| 325 | }
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| 326 | }
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| 327 | /* Read preliminary data */
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| 328 | switch (opcode)
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| 329 | {
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| 330 | case 0: /* Fill */
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| 331 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
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| 332 | insertmix = True;
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| 333 | break;
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| 334 | case 8: /* Bicolour */
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| 335 | CVAL2(input, colour1);
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| 336 | case 3: /* Colour */
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| 337 | CVAL2(input, colour2);
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| 338 | break;
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| 339 | case 6: /* SetMix/Mix */
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| 340 | case 7: /* SetMix/FillOrMix */
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| 341 | CVAL2(input, mix);
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| 342 | opcode -= 5;
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| 343 | break;
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| 344 | case 9: /* FillOrMix_1 */
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| 345 | mask = 0x03;
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| 346 | opcode = 0x02;
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| 347 | fom_mask = 3;
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| 348 | break;
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| 349 | case 0x0a: /* FillOrMix_2 */
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| 350 | mask = 0x05;
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| 351 | opcode = 0x02;
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| 352 | fom_mask = 5;
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| 353 | break;
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| 354 | }
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| 355 | lastopcode = opcode;
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| 356 | mixmask = 0;
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| 357 | /* Output body */
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| 358 | while (count > 0)
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| 359 | {
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| 360 | if (x >= width)
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| 361 | {
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| 362 | if (height <= 0)
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| 363 | return False;
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| 364 | x = 0;
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| 365 | height--;
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| 366 | prevline = line;
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| 367 | line = ((uint16 *) output) + height * width;
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| 368 | }
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| 369 | switch (opcode)
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| 370 | {
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| 371 | case 0: /* Fill */
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| 372 | if (insertmix)
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| 373 | {
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| 374 | if (prevline == NULL)
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| 375 | line[x] = mix;
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| 376 | else
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| 377 | line[x] = prevline[x] ^ mix;
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| 378 | insertmix = False;
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| 379 | count--;
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| 380 | x++;
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| 381 | }
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| 382 | if (prevline == NULL)
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| 383 | {
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| 384 | REPEAT(line[x] = 0)
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| 385 | }
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| 386 | else
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| 387 | {
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| 388 | REPEAT(line[x] = prevline[x])
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| 389 | }
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| 390 | break;
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| 391 | case 1: /* Mix */
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| 392 | if (prevline == NULL)
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| 393 | {
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| 394 | REPEAT(line[x] = mix)
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| 395 | }
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| 396 | else
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| 397 | {
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| 398 | REPEAT(line[x] = prevline[x] ^ mix)
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| 399 | }
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| 400 | break;
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| 401 | case 2: /* Fill or Mix */
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| 402 | if (prevline == NULL)
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| 403 | {
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| 404 | REPEAT
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| 405 | (
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| 406 | MASK_UPDATE();
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| 407 | if (mask & mixmask)
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| 408 | line[x] = mix;
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| 409 | else
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| 410 | line[x] = 0;
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| 411 | )
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| 412 | }
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| 413 | else
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| 414 | {
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| 415 | REPEAT
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| 416 | (
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| 417 | MASK_UPDATE();
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| 418 | if (mask & mixmask)
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| 419 | line[x] = prevline[x] ^ mix;
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| 420 | else
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| 421 | line[x] = prevline[x];
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| 422 | )
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| 423 | }
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| 424 | break;
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| 425 | case 3: /* Colour */
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| 426 | REPEAT(line[x] = colour2)
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| 427 | break;
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| 428 | case 4: /* Copy */
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| 429 | REPEAT(CVAL2(input, line[x]))
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| 430 | break;
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| 431 | case 8: /* Bicolour */
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| 432 | REPEAT
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| 433 | (
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| 434 | if (bicolour)
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| 435 | {
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| 436 | line[x] = colour2;
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| 437 | bicolour = False;
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| 438 | }
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| 439 | else
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| 440 | {
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| 441 | line[x] = colour1;
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| 442 | bicolour = True;
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| 443 | count++;
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| 444 | }
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| 445 | )
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| 446 | break;
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| 447 | case 0xd: /* White */
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| 448 | REPEAT(line[x] = 0xffff)
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| 449 | break;
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| 450 | case 0xe: /* Black */
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| 451 | REPEAT(line[x] = 0)
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| 452 | break;
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| 453 | default:
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| 454 | unimpl("bitmap opcode 0x%x\n", opcode);
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| 455 | return False;
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| 456 | }
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| 457 | }
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| 458 | }
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| 459 | return True;
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| 460 | }
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| 461 |
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| 462 | /* 3 byte bitmap decompress */
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|---|
| 463 | static RD_BOOL
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| 464 | bitmap_decompress3(uint8 * output, int width, int height, uint8 * input, int size)
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|---|
| 465 | {
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| 466 | uint8 *end = input + size;
|
|---|
| 467 | uint8 *prevline = NULL, *line = NULL;
|
|---|
| 468 | int opcode, count, offset, isfillormix, x = width;
|
|---|
| 469 | int lastopcode = -1, insertmix = False, bicolour = False;
|
|---|
| 470 | uint8 code;
|
|---|
| 471 | uint8 colour1[3] = {0, 0, 0}, colour2[3] = {0, 0, 0};
|
|---|
| 472 | uint8 mixmask, mask = 0;
|
|---|
| 473 | uint8 mix[3] = {0xff, 0xff, 0xff};
|
|---|
| 474 | int fom_mask = 0;
|
|---|
| 475 |
|
|---|
| 476 | while (input < end)
|
|---|
| 477 | {
|
|---|
| 478 | fom_mask = 0;
|
|---|
| 479 | code = CVAL(input);
|
|---|
| 480 | opcode = code >> 4;
|
|---|
| 481 | /* Handle different opcode forms */
|
|---|
| 482 | switch (opcode)
|
|---|
| 483 | {
|
|---|
| 484 | case 0xc:
|
|---|
| 485 | case 0xd:
|
|---|
| 486 | case 0xe:
|
|---|
| 487 | opcode -= 6;
|
|---|
| 488 | count = code & 0xf;
|
|---|
| 489 | offset = 16;
|
|---|
| 490 | break;
|
|---|
| 491 | case 0xf:
|
|---|
| 492 | opcode = code & 0xf;
|
|---|
| 493 | if (opcode < 9)
|
|---|
| 494 | {
|
|---|
| 495 | count = CVAL(input);
|
|---|
| 496 | count |= CVAL(input) << 8;
|
|---|
| 497 | }
|
|---|
| 498 | else
|
|---|
| 499 | {
|
|---|
| 500 | count = (opcode <
|
|---|
| 501 | 0xb) ? 8 : 1;
|
|---|
| 502 | }
|
|---|
| 503 | offset = 0;
|
|---|
| 504 | break;
|
|---|
| 505 | default:
|
|---|
| 506 | opcode >>= 1;
|
|---|
| 507 | count = code & 0x1f;
|
|---|
| 508 | offset = 32;
|
|---|
| 509 | break;
|
|---|
| 510 | }
|
|---|
| 511 | /* Handle strange cases for counts */
|
|---|
| 512 | if (offset != 0)
|
|---|
| 513 | {
|
|---|
| 514 | isfillormix = ((opcode == 2) || (opcode == 7));
|
|---|
| 515 | if (count == 0)
|
|---|
| 516 | {
|
|---|
| 517 | if (isfillormix)
|
|---|
| 518 | count = CVAL(input) + 1;
|
|---|
| 519 | else
|
|---|
| 520 | count = CVAL(input) + offset;
|
|---|
| 521 | }
|
|---|
| 522 | else if (isfillormix)
|
|---|
| 523 | {
|
|---|
| 524 | count <<= 3;
|
|---|
| 525 | }
|
|---|
| 526 | }
|
|---|
| 527 | /* Read preliminary data */
|
|---|
| 528 | switch (opcode)
|
|---|
| 529 | {
|
|---|
| 530 | case 0: /* Fill */
|
|---|
| 531 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
|
|---|
| 532 | insertmix = True;
|
|---|
| 533 | break;
|
|---|
| 534 | case 8: /* Bicolour */
|
|---|
| 535 | colour1[0] = CVAL(input);
|
|---|
| 536 | colour1[1] = CVAL(input);
|
|---|
| 537 | colour1[2] = CVAL(input);
|
|---|
| 538 | case 3: /* Colour */
|
|---|
| 539 | colour2[0] = CVAL(input);
|
|---|
| 540 | colour2[1] = CVAL(input);
|
|---|
| 541 | colour2[2] = CVAL(input);
|
|---|
| 542 | break;
|
|---|
| 543 | case 6: /* SetMix/Mix */
|
|---|
| 544 | case 7: /* SetMix/FillOrMix */
|
|---|
| 545 | mix[0] = CVAL(input);
|
|---|
| 546 | mix[1] = CVAL(input);
|
|---|
| 547 | mix[2] = CVAL(input);
|
|---|
| 548 | opcode -= 5;
|
|---|
| 549 | break;
|
|---|
| 550 | case 9: /* FillOrMix_1 */
|
|---|
| 551 | mask = 0x03;
|
|---|
| 552 | opcode = 0x02;
|
|---|
| 553 | fom_mask = 3;
|
|---|
| 554 | break;
|
|---|
| 555 | case 0x0a: /* FillOrMix_2 */
|
|---|
| 556 | mask = 0x05;
|
|---|
| 557 | opcode = 0x02;
|
|---|
| 558 | fom_mask = 5;
|
|---|
| 559 | break;
|
|---|
| 560 | }
|
|---|
| 561 | lastopcode = opcode;
|
|---|
| 562 | mixmask = 0;
|
|---|
| 563 | /* Output body */
|
|---|
| 564 | while (count > 0)
|
|---|
| 565 | {
|
|---|
| 566 | if (x >= width)
|
|---|
| 567 | {
|
|---|
| 568 | if (height <= 0)
|
|---|
| 569 | return False;
|
|---|
| 570 | x = 0;
|
|---|
| 571 | height--;
|
|---|
| 572 | prevline = line;
|
|---|
| 573 | line = output + height * (width * 3);
|
|---|
| 574 | }
|
|---|
| 575 | switch (opcode)
|
|---|
| 576 | {
|
|---|
| 577 | case 0: /* Fill */
|
|---|
| 578 | if (insertmix)
|
|---|
| 579 | {
|
|---|
| 580 | if (prevline == NULL)
|
|---|
| 581 | {
|
|---|
| 582 | line[x * 3] = mix[0];
|
|---|
| 583 | line[x * 3 + 1] = mix[1];
|
|---|
| 584 | line[x * 3 + 2] = mix[2];
|
|---|
| 585 | }
|
|---|
| 586 | else
|
|---|
| 587 | {
|
|---|
| 588 | line[x * 3] =
|
|---|
| 589 | prevline[x * 3] ^ mix[0];
|
|---|
| 590 | line[x * 3 + 1] =
|
|---|
| 591 | prevline[x * 3 + 1] ^ mix[1];
|
|---|
| 592 | line[x * 3 + 2] =
|
|---|
| 593 | prevline[x * 3 + 2] ^ mix[2];
|
|---|
| 594 | }
|
|---|
| 595 | insertmix = False;
|
|---|
| 596 | count--;
|
|---|
| 597 | x++;
|
|---|
| 598 | }
|
|---|
| 599 | if (prevline == NULL)
|
|---|
| 600 | {
|
|---|
| 601 | REPEAT
|
|---|
| 602 | (
|
|---|
| 603 | line[x * 3] = 0;
|
|---|
| 604 | line[x * 3 + 1] = 0;
|
|---|
| 605 | line[x * 3 + 2] = 0;
|
|---|
| 606 | )
|
|---|
| 607 | }
|
|---|
| 608 | else
|
|---|
| 609 | {
|
|---|
| 610 | REPEAT
|
|---|
| 611 | (
|
|---|
| 612 | line[x * 3] = prevline[x * 3];
|
|---|
| 613 | line[x * 3 + 1] = prevline[x * 3 + 1];
|
|---|
| 614 | line[x * 3 + 2] = prevline[x * 3 + 2];
|
|---|
| 615 | )
|
|---|
| 616 | }
|
|---|
| 617 | break;
|
|---|
| 618 | case 1: /* Mix */
|
|---|
| 619 | if (prevline == NULL)
|
|---|
| 620 | {
|
|---|
| 621 | REPEAT
|
|---|
| 622 | (
|
|---|
| 623 | line[x * 3] = mix[0];
|
|---|
| 624 | line[x * 3 + 1] = mix[1];
|
|---|
| 625 | line[x * 3 + 2] = mix[2];
|
|---|
| 626 | )
|
|---|
| 627 | }
|
|---|
| 628 | else
|
|---|
| 629 | {
|
|---|
| 630 | REPEAT
|
|---|
| 631 | (
|
|---|
| 632 | line[x * 3] =
|
|---|
| 633 | prevline[x * 3] ^ mix[0];
|
|---|
| 634 | line[x * 3 + 1] =
|
|---|
| 635 | prevline[x * 3 + 1] ^ mix[1];
|
|---|
| 636 | line[x * 3 + 2] =
|
|---|
| 637 | prevline[x * 3 + 2] ^ mix[2];
|
|---|
| 638 | )
|
|---|
| 639 | }
|
|---|
| 640 | break;
|
|---|
| 641 | case 2: /* Fill or Mix */
|
|---|
| 642 | if (prevline == NULL)
|
|---|
| 643 | {
|
|---|
| 644 | REPEAT
|
|---|
| 645 | (
|
|---|
| 646 | MASK_UPDATE();
|
|---|
| 647 | if (mask & mixmask)
|
|---|
| 648 | {
|
|---|
| 649 | line[x * 3] = mix[0];
|
|---|
| 650 | line[x * 3 + 1] = mix[1];
|
|---|
| 651 | line[x * 3 + 2] = mix[2];
|
|---|
| 652 | }
|
|---|
| 653 | else
|
|---|
| 654 | {
|
|---|
| 655 | line[x * 3] = 0;
|
|---|
| 656 | line[x * 3 + 1] = 0;
|
|---|
| 657 | line[x * 3 + 2] = 0;
|
|---|
| 658 | }
|
|---|
| 659 | )
|
|---|
| 660 | }
|
|---|
| 661 | else
|
|---|
| 662 | {
|
|---|
| 663 | REPEAT
|
|---|
| 664 | (
|
|---|
| 665 | MASK_UPDATE();
|
|---|
| 666 | if (mask & mixmask)
|
|---|
| 667 | {
|
|---|
| 668 | line[x * 3] =
|
|---|
| 669 | prevline[x * 3] ^ mix [0];
|
|---|
| 670 | line[x * 3 + 1] =
|
|---|
| 671 | prevline[x * 3 + 1] ^ mix [1];
|
|---|
| 672 | line[x * 3 + 2] =
|
|---|
| 673 | prevline[x * 3 + 2] ^ mix [2];
|
|---|
| 674 | }
|
|---|
| 675 | else
|
|---|
| 676 | {
|
|---|
| 677 | line[x * 3] =
|
|---|
| 678 | prevline[x * 3];
|
|---|
| 679 | line[x * 3 + 1] =
|
|---|
| 680 | prevline[x * 3 + 1];
|
|---|
| 681 | line[x * 3 + 2] =
|
|---|
| 682 | prevline[x * 3 + 2];
|
|---|
| 683 | }
|
|---|
| 684 | )
|
|---|
| 685 | }
|
|---|
| 686 | break;
|
|---|
| 687 | case 3: /* Colour */
|
|---|
| 688 | REPEAT
|
|---|
| 689 | (
|
|---|
| 690 | line[x * 3] = colour2 [0];
|
|---|
| 691 | line[x * 3 + 1] = colour2 [1];
|
|---|
| 692 | line[x * 3 + 2] = colour2 [2];
|
|---|
| 693 | )
|
|---|
| 694 | break;
|
|---|
| 695 | case 4: /* Copy */
|
|---|
| 696 | REPEAT
|
|---|
| 697 | (
|
|---|
| 698 | line[x * 3] = CVAL(input);
|
|---|
| 699 | line[x * 3 + 1] = CVAL(input);
|
|---|
| 700 | line[x * 3 + 2] = CVAL(input);
|
|---|
| 701 | )
|
|---|
| 702 | break;
|
|---|
| 703 | case 8: /* Bicolour */
|
|---|
| 704 | REPEAT
|
|---|
| 705 | (
|
|---|
| 706 | if (bicolour)
|
|---|
| 707 | {
|
|---|
| 708 | line[x * 3] = colour2[0];
|
|---|
| 709 | line[x * 3 + 1] = colour2[1];
|
|---|
| 710 | line[x * 3 + 2] = colour2[2];
|
|---|
| 711 | bicolour = False;
|
|---|
| 712 | }
|
|---|
| 713 | else
|
|---|
| 714 | {
|
|---|
| 715 | line[x * 3] = colour1[0];
|
|---|
| 716 | line[x * 3 + 1] = colour1[1];
|
|---|
| 717 | line[x * 3 + 2] = colour1[2];
|
|---|
| 718 | bicolour = True;
|
|---|
| 719 | count++;
|
|---|
| 720 | }
|
|---|
| 721 | )
|
|---|
| 722 | break;
|
|---|
| 723 | case 0xd: /* White */
|
|---|
| 724 | REPEAT
|
|---|
| 725 | (
|
|---|
| 726 | line[x * 3] = 0xff;
|
|---|
| 727 | line[x * 3 + 1] = 0xff;
|
|---|
| 728 | line[x * 3 + 2] = 0xff;
|
|---|
| 729 | )
|
|---|
| 730 | break;
|
|---|
| 731 | case 0xe: /* Black */
|
|---|
| 732 | REPEAT
|
|---|
| 733 | (
|
|---|
| 734 | line[x * 3] = 0;
|
|---|
| 735 | line[x * 3 + 1] = 0;
|
|---|
| 736 | line[x * 3 + 2] = 0;
|
|---|
| 737 | )
|
|---|
| 738 | break;
|
|---|
| 739 | default:
|
|---|
| 740 | unimpl("bitmap opcode 0x%x\n", opcode);
|
|---|
| 741 | return False;
|
|---|
| 742 | }
|
|---|
| 743 | }
|
|---|
| 744 | }
|
|---|
| 745 | return True;
|
|---|
| 746 | }
|
|---|
| 747 |
|
|---|
| 748 | /* decompress a colour plane */
|
|---|
| 749 | static int
|
|---|
| 750 | process_plane(uint8 * in, int width, int height, uint8 * out, int size)
|
|---|
| 751 | {
|
|---|
| 752 | int indexw;
|
|---|
| 753 | int indexh;
|
|---|
| 754 | int code;
|
|---|
| 755 | int collen;
|
|---|
| 756 | int replen;
|
|---|
| 757 | int color;
|
|---|
| 758 | int x;
|
|---|
| 759 | int revcode;
|
|---|
| 760 | uint8 * last_line;
|
|---|
| 761 | uint8 * this_line;
|
|---|
| 762 | uint8 * org_in;
|
|---|
| 763 | uint8 * org_out;
|
|---|
| 764 |
|
|---|
| 765 | org_in = in;
|
|---|
| 766 | org_out = out;
|
|---|
| 767 | last_line = 0;
|
|---|
| 768 | indexh = 0;
|
|---|
| 769 | while (indexh < height)
|
|---|
| 770 | {
|
|---|
| 771 | out = (org_out + width * height * 4) - ((indexh + 1) * width * 4);
|
|---|
| 772 | color = 0;
|
|---|
| 773 | this_line = out;
|
|---|
| 774 | indexw = 0;
|
|---|
| 775 | if (last_line == 0)
|
|---|
| 776 | {
|
|---|
| 777 | while (indexw < width)
|
|---|
| 778 | {
|
|---|
| 779 | code = CVAL(in);
|
|---|
| 780 | replen = code & 0xf;
|
|---|
| 781 | collen = (code >> 4) & 0xf;
|
|---|
| 782 | revcode = (replen << 4) | collen;
|
|---|
| 783 | if ((revcode <= 47) && (revcode >= 16))
|
|---|
| 784 | {
|
|---|
| 785 | replen = revcode;
|
|---|
| 786 | collen = 0;
|
|---|
| 787 | }
|
|---|
| 788 | while (collen > 0)
|
|---|
| 789 | {
|
|---|
| 790 | color = CVAL(in);
|
|---|
| 791 | *out = color;
|
|---|
| 792 | out += 4;
|
|---|
| 793 | indexw++;
|
|---|
| 794 | collen--;
|
|---|
| 795 | }
|
|---|
| 796 | while (replen > 0)
|
|---|
| 797 | {
|
|---|
| 798 | *out = color;
|
|---|
| 799 | out += 4;
|
|---|
| 800 | indexw++;
|
|---|
| 801 | replen--;
|
|---|
| 802 | }
|
|---|
| 803 | }
|
|---|
| 804 | }
|
|---|
| 805 | else
|
|---|
| 806 | {
|
|---|
| 807 | while (indexw < width)
|
|---|
| 808 | {
|
|---|
| 809 | code = CVAL(in);
|
|---|
| 810 | replen = code & 0xf;
|
|---|
| 811 | collen = (code >> 4) & 0xf;
|
|---|
| 812 | revcode = (replen << 4) | collen;
|
|---|
| 813 | if ((revcode <= 47) && (revcode >= 16))
|
|---|
| 814 | {
|
|---|
| 815 | replen = revcode;
|
|---|
| 816 | collen = 0;
|
|---|
| 817 | }
|
|---|
| 818 | while (collen > 0)
|
|---|
| 819 | {
|
|---|
| 820 | x = CVAL(in);
|
|---|
| 821 | if (x & 1)
|
|---|
| 822 | {
|
|---|
| 823 | x = x >> 1;
|
|---|
| 824 | x = x + 1;
|
|---|
| 825 | color = -x;
|
|---|
| 826 | }
|
|---|
| 827 | else
|
|---|
| 828 | {
|
|---|
| 829 | x = x >> 1;
|
|---|
| 830 | color = x;
|
|---|
| 831 | }
|
|---|
| 832 | x = last_line[indexw * 4] + color;
|
|---|
| 833 | *out = x;
|
|---|
| 834 | out += 4;
|
|---|
| 835 | indexw++;
|
|---|
| 836 | collen--;
|
|---|
| 837 | }
|
|---|
| 838 | while (replen > 0)
|
|---|
| 839 | {
|
|---|
| 840 | x = last_line[indexw * 4] + color;
|
|---|
| 841 | *out = x;
|
|---|
| 842 | out += 4;
|
|---|
| 843 | indexw++;
|
|---|
| 844 | replen--;
|
|---|
| 845 | }
|
|---|
| 846 | }
|
|---|
| 847 | }
|
|---|
| 848 | indexh++;
|
|---|
| 849 | last_line = this_line;
|
|---|
| 850 | }
|
|---|
| 851 | return (int) (in - org_in);
|
|---|
| 852 | }
|
|---|
| 853 |
|
|---|
| 854 | /* 4 byte bitmap decompress */
|
|---|
| 855 | static RD_BOOL
|
|---|
| 856 | bitmap_decompress4(uint8 * output, int width, int height, uint8 * input, int size)
|
|---|
| 857 | {
|
|---|
| 858 | int code;
|
|---|
| 859 | int bytes_pro;
|
|---|
| 860 | int total_pro;
|
|---|
| 861 |
|
|---|
| 862 | code = CVAL(input);
|
|---|
| 863 | if (code != 0x10)
|
|---|
| 864 | {
|
|---|
| 865 | return False;
|
|---|
| 866 | }
|
|---|
| 867 | total_pro = 1;
|
|---|
| 868 | bytes_pro = process_plane(input, width, height, output + 3, size - total_pro);
|
|---|
| 869 | total_pro += bytes_pro;
|
|---|
| 870 | input += bytes_pro;
|
|---|
| 871 | bytes_pro = process_plane(input, width, height, output + 2, size - total_pro);
|
|---|
| 872 | total_pro += bytes_pro;
|
|---|
| 873 | input += bytes_pro;
|
|---|
| 874 | bytes_pro = process_plane(input, width, height, output + 1, size - total_pro);
|
|---|
| 875 | total_pro += bytes_pro;
|
|---|
| 876 | input += bytes_pro;
|
|---|
| 877 | bytes_pro = process_plane(input, width, height, output + 0, size - total_pro);
|
|---|
| 878 | total_pro += bytes_pro;
|
|---|
| 879 | return size == total_pro;
|
|---|
| 880 | }
|
|---|
| 881 |
|
|---|
| 882 | /* main decompress function */
|
|---|
| 883 | RD_BOOL
|
|---|
| 884 | bitmap_decompress(uint8 * output, int width, int height, uint8 * input, int size, int Bpp)
|
|---|
| 885 | {
|
|---|
| 886 | RD_BOOL rv = False;
|
|---|
| 887 |
|
|---|
| 888 | switch (Bpp)
|
|---|
| 889 | {
|
|---|
| 890 | case 1:
|
|---|
| 891 | rv = bitmap_decompress1(output, width, height, input, size);
|
|---|
| 892 | break;
|
|---|
| 893 | case 2:
|
|---|
| 894 | rv = bitmap_decompress2(output, width, height, input, size);
|
|---|
| 895 | break;
|
|---|
| 896 | case 3:
|
|---|
| 897 | rv = bitmap_decompress3(output, width, height, input, size);
|
|---|
| 898 | break;
|
|---|
| 899 | case 4:
|
|---|
| 900 | rv = bitmap_decompress4(output, width, height, input, size);
|
|---|
| 901 | break;
|
|---|
| 902 | default:
|
|---|
| 903 | unimpl("Bpp %d\n", Bpp);
|
|---|
| 904 | break;
|
|---|
| 905 | }
|
|---|
| 906 | return rv;
|
|---|
| 907 | }
|
|---|
| 908 |
|
|---|
| 909 | /* *INDENT-ON* */
|
|---|
