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 | /*
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21 | * Oracle GPL Disclaimer: For the avoidance of doubt, except that if any license choice
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22 | * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
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23 | * the General Public License version 2 (GPLv2) at this time for any software where
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24 | * a choice of GPL license versions is made available with the language indicating
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25 | * that GPLv2 or any later version may be used, or where a choice of which version
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26 | * of the GPL is applied is otherwise unspecified.
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27 | */
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28 |
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29 | /* three seperate function for speed when decompressing the bitmaps
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30 | when modifing one function make the change in the others
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31 | jay.sorg@gmail.com */
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32 |
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33 | /* indent is confused by this file */
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34 | /* *INDENT-OFF* */
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35 |
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36 | #include "rdesktop.h"
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37 |
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38 | #define CVAL(p) (*(p++))
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39 | #ifdef NEED_ALIGN
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40 | #ifdef L_ENDIAN
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41 | #define CVAL2(p, v) { v = (*(p++)); v |= (*(p++)) << 8; }
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42 | #else
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43 | #define CVAL2(p, v) { v = (*(p++)) << 8; v |= (*(p++)); }
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44 | #endif /* L_ENDIAN */
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45 | #else
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46 | #define CVAL2(p, v) { v = (*((uint16*)p)); p += 2; }
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47 | #endif /* NEED_ALIGN */
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48 |
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49 | #define UNROLL8(exp) { exp exp exp exp exp exp exp exp }
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50 |
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51 | #define REPEAT(statement) \
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52 | { \
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53 | while((count & ~0x7) && ((x+8) < width)) \
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54 | UNROLL8( statement; count--; x++; ); \
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55 | \
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56 | while((count > 0) && (x < width)) \
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57 | { \
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58 | statement; \
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59 | count--; \
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60 | x++; \
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61 | } \
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62 | }
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63 |
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64 | #define MASK_UPDATE() \
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65 | { \
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66 | mixmask <<= 1; \
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67 | if (mixmask == 0) \
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68 | { \
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69 | mask = fom_mask ? fom_mask : CVAL(input); \
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70 | mixmask = 1; \
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71 | } \
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72 | }
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73 |
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74 | /* 1 byte bitmap decompress */
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75 | static RD_BOOL
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76 | bitmap_decompress1(uint8 * output, int width, int height, uint8 * input, int size)
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77 | {
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78 | uint8 *end = input + size;
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79 | uint8 *prevline = NULL, *line = NULL;
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80 | int opcode, count, offset, isfillormix, x = width;
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81 | int lastopcode = -1, insertmix = False, bicolour = False;
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82 | uint8 code;
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83 | uint8 colour1 = 0, colour2 = 0;
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84 | uint8 mixmask, mask = 0;
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85 | uint8 mix = 0xff;
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86 | int fom_mask = 0;
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87 |
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88 | while (input < end)
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89 | {
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90 | fom_mask = 0;
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91 | code = CVAL(input);
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92 | opcode = code >> 4;
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93 | /* Handle different opcode forms */
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94 | switch (opcode)
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95 | {
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96 | case 0xc:
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97 | case 0xd:
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98 | case 0xe:
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99 | opcode -= 6;
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100 | count = code & 0xf;
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101 | offset = 16;
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102 | break;
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103 | case 0xf:
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104 | opcode = code & 0xf;
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105 | if (opcode < 9)
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106 | {
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107 | count = CVAL(input);
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108 | count |= CVAL(input) << 8;
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109 | }
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110 | else
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111 | {
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112 | count = (opcode < 0xb) ? 8 : 1;
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113 | }
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114 | offset = 0;
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115 | break;
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116 | default:
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117 | opcode >>= 1;
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118 | count = code & 0x1f;
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119 | offset = 32;
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120 | break;
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121 | }
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122 | /* Handle strange cases for counts */
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123 | if (offset != 0)
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124 | {
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125 | isfillormix = ((opcode == 2) || (opcode == 7));
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126 | if (count == 0)
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127 | {
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128 | if (isfillormix)
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129 | count = CVAL(input) + 1;
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130 | else
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131 | count = CVAL(input) + offset;
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132 | }
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133 | else if (isfillormix)
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134 | {
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135 | count <<= 3;
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136 | }
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137 | }
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138 | /* Read preliminary data */
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139 | switch (opcode)
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140 | {
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141 | case 0: /* Fill */
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142 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
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143 | insertmix = True;
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144 | break;
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145 | case 8: /* Bicolour */
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146 | colour1 = CVAL(input);
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147 | case 3: /* Colour */
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148 | colour2 = CVAL(input);
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149 | break;
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150 | case 6: /* SetMix/Mix */
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151 | case 7: /* SetMix/FillOrMix */
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152 | mix = CVAL(input);
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153 | opcode -= 5;
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154 | break;
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155 | case 9: /* FillOrMix_1 */
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156 | mask = 0x03;
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157 | opcode = 0x02;
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158 | fom_mask = 3;
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159 | break;
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160 | case 0x0a: /* FillOrMix_2 */
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161 | mask = 0x05;
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162 | opcode = 0x02;
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163 | fom_mask = 5;
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164 | break;
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165 | }
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166 | lastopcode = opcode;
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167 | mixmask = 0;
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168 | /* Output body */
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169 | while (count > 0)
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170 | {
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171 | if (x >= width)
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172 | {
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173 | if (height <= 0)
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174 | return False;
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175 | x = 0;
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176 | height--;
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177 | prevline = line;
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178 | line = output + height * width;
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179 | }
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180 | switch (opcode)
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181 | {
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182 | case 0: /* Fill */
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183 | if (insertmix)
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184 | {
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185 | if (prevline == NULL)
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186 | line[x] = mix;
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187 | else
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188 | line[x] = prevline[x] ^ mix;
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189 | insertmix = False;
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190 | count--;
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191 | x++;
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192 | }
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193 | if (prevline == NULL)
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194 | {
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195 | REPEAT(line[x] = 0)
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196 | }
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197 | else
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198 | {
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199 | REPEAT(line[x] = prevline[x])
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200 | }
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201 | break;
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202 | case 1: /* Mix */
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203 | if (prevline == NULL)
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204 | {
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205 | REPEAT(line[x] = mix)
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206 | }
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207 | else
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208 | {
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209 | REPEAT(line[x] = prevline[x] ^ mix)
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210 | }
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211 | break;
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212 | case 2: /* Fill or Mix */
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213 | if (prevline == NULL)
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214 | {
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215 | REPEAT
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216 | (
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217 | MASK_UPDATE();
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218 | if (mask & mixmask)
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219 | line[x] = mix;
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220 | else
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221 | line[x] = 0;
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222 | )
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223 | }
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224 | else
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225 | {
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226 | REPEAT
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227 | (
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228 | MASK_UPDATE();
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229 | if (mask & mixmask)
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230 | line[x] = prevline[x] ^ mix;
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231 | else
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232 | line[x] = prevline[x];
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233 | )
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234 | }
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235 | break;
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236 | case 3: /* Colour */
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237 | REPEAT(line[x] = colour2)
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238 | break;
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239 | case 4: /* Copy */
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240 | REPEAT(line[x] = CVAL(input))
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241 | break;
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242 | case 8: /* Bicolour */
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243 | REPEAT
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244 | (
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245 | if (bicolour)
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246 | {
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247 | line[x] = colour2;
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248 | bicolour = False;
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249 | }
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250 | else
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251 | {
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252 | line[x] = colour1;
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253 | bicolour = True; count++;
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254 | }
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255 | )
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256 | break;
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257 | case 0xd: /* White */
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258 | REPEAT(line[x] = 0xff)
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259 | break;
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260 | case 0xe: /* Black */
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261 | REPEAT(line[x] = 0)
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262 | break;
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263 | default:
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264 | unimpl("bitmap opcode 0x%x\n", opcode);
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265 | return False;
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266 | }
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267 | }
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268 | }
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269 | return True;
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270 | }
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271 |
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272 | /* 2 byte bitmap decompress */
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273 | static RD_BOOL
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274 | bitmap_decompress2(uint8 * output, int width, int height, uint8 * input, int size)
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275 | {
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276 | uint8 *end = input + size;
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277 | uint16 *prevline = NULL, *line = NULL;
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278 | int opcode, count, offset, isfillormix, x = width;
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279 | int lastopcode = -1, insertmix = False, bicolour = False;
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280 | uint8 code;
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281 | uint16 colour1 = 0, colour2 = 0;
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282 | uint8 mixmask, mask = 0;
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283 | uint16 mix = 0xffff;
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284 | int fom_mask = 0;
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285 |
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286 | while (input < end)
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287 | {
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288 | fom_mask = 0;
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289 | code = CVAL(input);
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290 | opcode = code >> 4;
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291 | /* Handle different opcode forms */
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292 | switch (opcode)
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293 | {
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294 | case 0xc:
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295 | case 0xd:
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296 | case 0xe:
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297 | opcode -= 6;
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298 | count = code & 0xf;
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299 | offset = 16;
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300 | break;
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301 | case 0xf:
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302 | opcode = code & 0xf;
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303 | if (opcode < 9)
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304 | {
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305 | count = CVAL(input);
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306 | count |= CVAL(input) << 8;
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307 | }
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308 | else
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309 | {
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310 | count = (opcode < 0xb) ? 8 : 1;
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311 | }
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312 | offset = 0;
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313 | break;
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314 | default:
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315 | opcode >>= 1;
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316 | count = code & 0x1f;
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317 | offset = 32;
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318 | break;
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319 | }
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320 | /* Handle strange cases for counts */
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321 | if (offset != 0)
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322 | {
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323 | isfillormix = ((opcode == 2) || (opcode == 7));
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324 | if (count == 0)
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325 | {
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326 | if (isfillormix)
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327 | count = CVAL(input) + 1;
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328 | else
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329 | count = CVAL(input) + offset;
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330 | }
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331 | else if (isfillormix)
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332 | {
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333 | count <<= 3;
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334 | }
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335 | }
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336 | /* Read preliminary data */
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337 | switch (opcode)
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338 | {
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339 | case 0: /* Fill */
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340 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
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341 | insertmix = True;
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342 | break;
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343 | case 8: /* Bicolour */
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344 | CVAL2(input, colour1);
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345 | case 3: /* Colour */
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346 | CVAL2(input, colour2);
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347 | break;
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348 | case 6: /* SetMix/Mix */
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349 | case 7: /* SetMix/FillOrMix */
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350 | CVAL2(input, mix);
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351 | opcode -= 5;
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352 | break;
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353 | case 9: /* FillOrMix_1 */
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354 | mask = 0x03;
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355 | opcode = 0x02;
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356 | fom_mask = 3;
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357 | break;
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358 | case 0x0a: /* FillOrMix_2 */
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359 | mask = 0x05;
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360 | opcode = 0x02;
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361 | fom_mask = 5;
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362 | break;
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363 | }
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364 | lastopcode = opcode;
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365 | mixmask = 0;
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366 | /* Output body */
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367 | while (count > 0)
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368 | {
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369 | if (x >= width)
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370 | {
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371 | if (height <= 0)
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372 | return False;
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373 | x = 0;
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374 | height--;
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375 | prevline = line;
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376 | line = ((uint16 *) output) + height * width;
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377 | }
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378 | switch (opcode)
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379 | {
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380 | case 0: /* Fill */
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381 | if (insertmix)
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382 | {
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383 | if (prevline == NULL)
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384 | line[x] = mix;
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385 | else
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386 | line[x] = prevline[x] ^ mix;
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387 | insertmix = False;
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388 | count--;
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389 | x++;
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390 | }
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391 | if (prevline == NULL)
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392 | {
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393 | REPEAT(line[x] = 0)
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394 | }
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395 | else
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396 | {
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397 | REPEAT(line[x] = prevline[x])
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398 | }
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399 | break;
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400 | case 1: /* Mix */
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401 | if (prevline == NULL)
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402 | {
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403 | REPEAT(line[x] = mix)
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404 | }
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405 | else
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406 | {
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407 | REPEAT(line[x] = prevline[x] ^ mix)
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408 | }
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409 | break;
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410 | case 2: /* Fill or Mix */
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411 | if (prevline == NULL)
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412 | {
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413 | REPEAT
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414 | (
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415 | MASK_UPDATE();
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416 | if (mask & mixmask)
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417 | line[x] = mix;
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418 | else
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419 | line[x] = 0;
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420 | )
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421 | }
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422 | else
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423 | {
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424 | REPEAT
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425 | (
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426 | MASK_UPDATE();
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427 | if (mask & mixmask)
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428 | line[x] = prevline[x] ^ mix;
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429 | else
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430 | line[x] = prevline[x];
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431 | )
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432 | }
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433 | break;
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434 | case 3: /* Colour */
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435 | REPEAT(line[x] = colour2)
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436 | break;
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437 | case 4: /* Copy */
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438 | REPEAT(CVAL2(input, line[x]))
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439 | break;
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440 | case 8: /* Bicolour */
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441 | REPEAT
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442 | (
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443 | if (bicolour)
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444 | {
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445 | line[x] = colour2;
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446 | bicolour = False;
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447 | }
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448 | else
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449 | {
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450 | line[x] = colour1;
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451 | bicolour = True;
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452 | count++;
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453 | }
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454 | )
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455 | break;
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456 | case 0xd: /* White */
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457 | REPEAT(line[x] = 0xffff)
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458 | break;
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459 | case 0xe: /* Black */
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460 | REPEAT(line[x] = 0)
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461 | break;
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462 | default:
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463 | unimpl("bitmap opcode 0x%x\n", opcode);
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464 | return False;
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465 | }
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466 | }
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467 | }
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468 | return True;
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469 | }
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470 |
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471 | /* 3 byte bitmap decompress */
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472 | static RD_BOOL
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473 | bitmap_decompress3(uint8 * output, int width, int height, uint8 * input, int size)
|
---|
474 | {
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475 | uint8 *end = input + size;
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476 | uint8 *prevline = NULL, *line = NULL;
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---|
477 | int opcode, count, offset, isfillormix, x = width;
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478 | int lastopcode = -1, insertmix = False, bicolour = False;
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479 | uint8 code;
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480 | uint8 colour1[3] = {0, 0, 0}, colour2[3] = {0, 0, 0};
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481 | uint8 mixmask, mask = 0;
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482 | uint8 mix[3] = {0xff, 0xff, 0xff};
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483 | int fom_mask = 0;
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484 |
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485 | while (input < end)
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486 | {
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487 | fom_mask = 0;
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488 | code = CVAL(input);
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489 | opcode = code >> 4;
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490 | /* Handle different opcode forms */
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491 | switch (opcode)
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492 | {
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493 | case 0xc:
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494 | case 0xd:
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495 | case 0xe:
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496 | opcode -= 6;
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497 | count = code & 0xf;
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498 | offset = 16;
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499 | break;
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500 | case 0xf:
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501 | opcode = code & 0xf;
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502 | if (opcode < 9)
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503 | {
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504 | count = CVAL(input);
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505 | count |= CVAL(input) << 8;
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506 | }
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507 | else
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508 | {
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509 | count = (opcode <
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510 | 0xb) ? 8 : 1;
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511 | }
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---|
512 | offset = 0;
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513 | break;
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514 | default:
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515 | opcode >>= 1;
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516 | count = code & 0x1f;
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---|
517 | offset = 32;
|
---|
518 | break;
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---|
519 | }
|
---|
520 | /* Handle strange cases for counts */
|
---|
521 | if (offset != 0)
|
---|
522 | {
|
---|
523 | isfillormix = ((opcode == 2) || (opcode == 7));
|
---|
524 | if (count == 0)
|
---|
525 | {
|
---|
526 | if (isfillormix)
|
---|
527 | count = CVAL(input) + 1;
|
---|
528 | else
|
---|
529 | count = CVAL(input) + offset;
|
---|
530 | }
|
---|
531 | else if (isfillormix)
|
---|
532 | {
|
---|
533 | count <<= 3;
|
---|
534 | }
|
---|
535 | }
|
---|
536 | /* Read preliminary data */
|
---|
537 | switch (opcode)
|
---|
538 | {
|
---|
539 | case 0: /* Fill */
|
---|
540 | if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
|
---|
541 | insertmix = True;
|
---|
542 | break;
|
---|
543 | case 8: /* Bicolour */
|
---|
544 | colour1[0] = CVAL(input);
|
---|
545 | colour1[1] = CVAL(input);
|
---|
546 | colour1[2] = CVAL(input);
|
---|
547 | case 3: /* Colour */
|
---|
548 | colour2[0] = CVAL(input);
|
---|
549 | colour2[1] = CVAL(input);
|
---|
550 | colour2[2] = CVAL(input);
|
---|
551 | break;
|
---|
552 | case 6: /* SetMix/Mix */
|
---|
553 | case 7: /* SetMix/FillOrMix */
|
---|
554 | mix[0] = CVAL(input);
|
---|
555 | mix[1] = CVAL(input);
|
---|
556 | mix[2] = CVAL(input);
|
---|
557 | opcode -= 5;
|
---|
558 | break;
|
---|
559 | case 9: /* FillOrMix_1 */
|
---|
560 | mask = 0x03;
|
---|
561 | opcode = 0x02;
|
---|
562 | fom_mask = 3;
|
---|
563 | break;
|
---|
564 | case 0x0a: /* FillOrMix_2 */
|
---|
565 | mask = 0x05;
|
---|
566 | opcode = 0x02;
|
---|
567 | fom_mask = 5;
|
---|
568 | break;
|
---|
569 | }
|
---|
570 | lastopcode = opcode;
|
---|
571 | mixmask = 0;
|
---|
572 | /* Output body */
|
---|
573 | while (count > 0)
|
---|
574 | {
|
---|
575 | if (x >= width)
|
---|
576 | {
|
---|
577 | if (height <= 0)
|
---|
578 | return False;
|
---|
579 | x = 0;
|
---|
580 | height--;
|
---|
581 | prevline = line;
|
---|
582 | line = output + height * (width * 3);
|
---|
583 | }
|
---|
584 | switch (opcode)
|
---|
585 | {
|
---|
586 | case 0: /* Fill */
|
---|
587 | if (insertmix)
|
---|
588 | {
|
---|
589 | if (prevline == NULL)
|
---|
590 | {
|
---|
591 | line[x * 3] = mix[0];
|
---|
592 | line[x * 3 + 1] = mix[1];
|
---|
593 | line[x * 3 + 2] = mix[2];
|
---|
594 | }
|
---|
595 | else
|
---|
596 | {
|
---|
597 | line[x * 3] =
|
---|
598 | prevline[x * 3] ^ mix[0];
|
---|
599 | line[x * 3 + 1] =
|
---|
600 | prevline[x * 3 + 1] ^ mix[1];
|
---|
601 | line[x * 3 + 2] =
|
---|
602 | prevline[x * 3 + 2] ^ mix[2];
|
---|
603 | }
|
---|
604 | insertmix = False;
|
---|
605 | count--;
|
---|
606 | x++;
|
---|
607 | }
|
---|
608 | if (prevline == NULL)
|
---|
609 | {
|
---|
610 | REPEAT
|
---|
611 | (
|
---|
612 | line[x * 3] = 0;
|
---|
613 | line[x * 3 + 1] = 0;
|
---|
614 | line[x * 3 + 2] = 0;
|
---|
615 | )
|
---|
616 | }
|
---|
617 | else
|
---|
618 | {
|
---|
619 | REPEAT
|
---|
620 | (
|
---|
621 | line[x * 3] = prevline[x * 3];
|
---|
622 | line[x * 3 + 1] = prevline[x * 3 + 1];
|
---|
623 | line[x * 3 + 2] = prevline[x * 3 + 2];
|
---|
624 | )
|
---|
625 | }
|
---|
626 | break;
|
---|
627 | case 1: /* Mix */
|
---|
628 | if (prevline == NULL)
|
---|
629 | {
|
---|
630 | REPEAT
|
---|
631 | (
|
---|
632 | line[x * 3] = mix[0];
|
---|
633 | line[x * 3 + 1] = mix[1];
|
---|
634 | line[x * 3 + 2] = mix[2];
|
---|
635 | )
|
---|
636 | }
|
---|
637 | else
|
---|
638 | {
|
---|
639 | REPEAT
|
---|
640 | (
|
---|
641 | line[x * 3] =
|
---|
642 | prevline[x * 3] ^ mix[0];
|
---|
643 | line[x * 3 + 1] =
|
---|
644 | prevline[x * 3 + 1] ^ mix[1];
|
---|
645 | line[x * 3 + 2] =
|
---|
646 | prevline[x * 3 + 2] ^ mix[2];
|
---|
647 | )
|
---|
648 | }
|
---|
649 | break;
|
---|
650 | case 2: /* Fill or Mix */
|
---|
651 | if (prevline == NULL)
|
---|
652 | {
|
---|
653 | REPEAT
|
---|
654 | (
|
---|
655 | MASK_UPDATE();
|
---|
656 | if (mask & mixmask)
|
---|
657 | {
|
---|
658 | line[x * 3] = mix[0];
|
---|
659 | line[x * 3 + 1] = mix[1];
|
---|
660 | line[x * 3 + 2] = mix[2];
|
---|
661 | }
|
---|
662 | else
|
---|
663 | {
|
---|
664 | line[x * 3] = 0;
|
---|
665 | line[x * 3 + 1] = 0;
|
---|
666 | line[x * 3 + 2] = 0;
|
---|
667 | }
|
---|
668 | )
|
---|
669 | }
|
---|
670 | else
|
---|
671 | {
|
---|
672 | REPEAT
|
---|
673 | (
|
---|
674 | MASK_UPDATE();
|
---|
675 | if (mask & mixmask)
|
---|
676 | {
|
---|
677 | line[x * 3] =
|
---|
678 | prevline[x * 3] ^ mix [0];
|
---|
679 | line[x * 3 + 1] =
|
---|
680 | prevline[x * 3 + 1] ^ mix [1];
|
---|
681 | line[x * 3 + 2] =
|
---|
682 | prevline[x * 3 + 2] ^ mix [2];
|
---|
683 | }
|
---|
684 | else
|
---|
685 | {
|
---|
686 | line[x * 3] =
|
---|
687 | prevline[x * 3];
|
---|
688 | line[x * 3 + 1] =
|
---|
689 | prevline[x * 3 + 1];
|
---|
690 | line[x * 3 + 2] =
|
---|
691 | prevline[x * 3 + 2];
|
---|
692 | }
|
---|
693 | )
|
---|
694 | }
|
---|
695 | break;
|
---|
696 | case 3: /* Colour */
|
---|
697 | REPEAT
|
---|
698 | (
|
---|
699 | line[x * 3] = colour2 [0];
|
---|
700 | line[x * 3 + 1] = colour2 [1];
|
---|
701 | line[x * 3 + 2] = colour2 [2];
|
---|
702 | )
|
---|
703 | break;
|
---|
704 | case 4: /* Copy */
|
---|
705 | REPEAT
|
---|
706 | (
|
---|
707 | line[x * 3] = CVAL(input);
|
---|
708 | line[x * 3 + 1] = CVAL(input);
|
---|
709 | line[x * 3 + 2] = CVAL(input);
|
---|
710 | )
|
---|
711 | break;
|
---|
712 | case 8: /* Bicolour */
|
---|
713 | REPEAT
|
---|
714 | (
|
---|
715 | if (bicolour)
|
---|
716 | {
|
---|
717 | line[x * 3] = colour2[0];
|
---|
718 | line[x * 3 + 1] = colour2[1];
|
---|
719 | line[x * 3 + 2] = colour2[2];
|
---|
720 | bicolour = False;
|
---|
721 | }
|
---|
722 | else
|
---|
723 | {
|
---|
724 | line[x * 3] = colour1[0];
|
---|
725 | line[x * 3 + 1] = colour1[1];
|
---|
726 | line[x * 3 + 2] = colour1[2];
|
---|
727 | bicolour = True;
|
---|
728 | count++;
|
---|
729 | }
|
---|
730 | )
|
---|
731 | break;
|
---|
732 | case 0xd: /* White */
|
---|
733 | REPEAT
|
---|
734 | (
|
---|
735 | line[x * 3] = 0xff;
|
---|
736 | line[x * 3 + 1] = 0xff;
|
---|
737 | line[x * 3 + 2] = 0xff;
|
---|
738 | )
|
---|
739 | break;
|
---|
740 | case 0xe: /* Black */
|
---|
741 | REPEAT
|
---|
742 | (
|
---|
743 | line[x * 3] = 0;
|
---|
744 | line[x * 3 + 1] = 0;
|
---|
745 | line[x * 3 + 2] = 0;
|
---|
746 | )
|
---|
747 | break;
|
---|
748 | default:
|
---|
749 | unimpl("bitmap opcode 0x%x\n", opcode);
|
---|
750 | return False;
|
---|
751 | }
|
---|
752 | }
|
---|
753 | }
|
---|
754 | return True;
|
---|
755 | }
|
---|
756 |
|
---|
757 | /* decompress a colour plane */
|
---|
758 | static int
|
---|
759 | process_plane(uint8 * in, int width, int height, uint8 * out, int size)
|
---|
760 | {
|
---|
761 | int indexw;
|
---|
762 | int indexh;
|
---|
763 | int code;
|
---|
764 | int collen;
|
---|
765 | int replen;
|
---|
766 | int color;
|
---|
767 | int x;
|
---|
768 | int revcode;
|
---|
769 | uint8 * last_line;
|
---|
770 | uint8 * this_line;
|
---|
771 | uint8 * org_in;
|
---|
772 | uint8 * org_out;
|
---|
773 |
|
---|
774 | org_in = in;
|
---|
775 | org_out = out;
|
---|
776 | last_line = 0;
|
---|
777 | indexh = 0;
|
---|
778 | while (indexh < height)
|
---|
779 | {
|
---|
780 | out = (org_out + width * height * 4) - ((indexh + 1) * width * 4);
|
---|
781 | color = 0;
|
---|
782 | this_line = out;
|
---|
783 | indexw = 0;
|
---|
784 | if (last_line == 0)
|
---|
785 | {
|
---|
786 | while (indexw < width)
|
---|
787 | {
|
---|
788 | code = CVAL(in);
|
---|
789 | replen = code & 0xf;
|
---|
790 | collen = (code >> 4) & 0xf;
|
---|
791 | revcode = (replen << 4) | collen;
|
---|
792 | if ((revcode <= 47) && (revcode >= 16))
|
---|
793 | {
|
---|
794 | replen = revcode;
|
---|
795 | collen = 0;
|
---|
796 | }
|
---|
797 | while (collen > 0)
|
---|
798 | {
|
---|
799 | color = CVAL(in);
|
---|
800 | *out = color;
|
---|
801 | out += 4;
|
---|
802 | indexw++;
|
---|
803 | collen--;
|
---|
804 | }
|
---|
805 | while (replen > 0)
|
---|
806 | {
|
---|
807 | *out = color;
|
---|
808 | out += 4;
|
---|
809 | indexw++;
|
---|
810 | replen--;
|
---|
811 | }
|
---|
812 | }
|
---|
813 | }
|
---|
814 | else
|
---|
815 | {
|
---|
816 | while (indexw < width)
|
---|
817 | {
|
---|
818 | code = CVAL(in);
|
---|
819 | replen = code & 0xf;
|
---|
820 | collen = (code >> 4) & 0xf;
|
---|
821 | revcode = (replen << 4) | collen;
|
---|
822 | if ((revcode <= 47) && (revcode >= 16))
|
---|
823 | {
|
---|
824 | replen = revcode;
|
---|
825 | collen = 0;
|
---|
826 | }
|
---|
827 | while (collen > 0)
|
---|
828 | {
|
---|
829 | x = CVAL(in);
|
---|
830 | if (x & 1)
|
---|
831 | {
|
---|
832 | x = x >> 1;
|
---|
833 | x = x + 1;
|
---|
834 | color = -x;
|
---|
835 | }
|
---|
836 | else
|
---|
837 | {
|
---|
838 | x = x >> 1;
|
---|
839 | color = x;
|
---|
840 | }
|
---|
841 | x = last_line[indexw * 4] + color;
|
---|
842 | *out = x;
|
---|
843 | out += 4;
|
---|
844 | indexw++;
|
---|
845 | collen--;
|
---|
846 | }
|
---|
847 | while (replen > 0)
|
---|
848 | {
|
---|
849 | x = last_line[indexw * 4] + color;
|
---|
850 | *out = x;
|
---|
851 | out += 4;
|
---|
852 | indexw++;
|
---|
853 | replen--;
|
---|
854 | }
|
---|
855 | }
|
---|
856 | }
|
---|
857 | indexh++;
|
---|
858 | last_line = this_line;
|
---|
859 | }
|
---|
860 | return (int) (in - org_in);
|
---|
861 | }
|
---|
862 |
|
---|
863 | /* 4 byte bitmap decompress */
|
---|
864 | static RD_BOOL
|
---|
865 | bitmap_decompress4(uint8 * output, int width, int height, uint8 * input, int size)
|
---|
866 | {
|
---|
867 | int code;
|
---|
868 | int bytes_pro;
|
---|
869 | int total_pro;
|
---|
870 |
|
---|
871 | code = CVAL(input);
|
---|
872 | if (code != 0x10)
|
---|
873 | {
|
---|
874 | return False;
|
---|
875 | }
|
---|
876 | total_pro = 1;
|
---|
877 | bytes_pro = process_plane(input, width, height, output + 3, size - total_pro);
|
---|
878 | total_pro += bytes_pro;
|
---|
879 | input += bytes_pro;
|
---|
880 | bytes_pro = process_plane(input, width, height, output + 2, size - total_pro);
|
---|
881 | total_pro += bytes_pro;
|
---|
882 | input += bytes_pro;
|
---|
883 | bytes_pro = process_plane(input, width, height, output + 1, size - total_pro);
|
---|
884 | total_pro += bytes_pro;
|
---|
885 | input += bytes_pro;
|
---|
886 | bytes_pro = process_plane(input, width, height, output + 0, size - total_pro);
|
---|
887 | total_pro += bytes_pro;
|
---|
888 | return size == total_pro;
|
---|
889 | }
|
---|
890 |
|
---|
891 | /* main decompress function */
|
---|
892 | RD_BOOL
|
---|
893 | bitmap_decompress(uint8 * output, int width, int height, uint8 * input, int size, int Bpp)
|
---|
894 | {
|
---|
895 | RD_BOOL rv = False;
|
---|
896 |
|
---|
897 | switch (Bpp)
|
---|
898 | {
|
---|
899 | case 1:
|
---|
900 | rv = bitmap_decompress1(output, width, height, input, size);
|
---|
901 | break;
|
---|
902 | case 2:
|
---|
903 | rv = bitmap_decompress2(output, width, height, input, size);
|
---|
904 | break;
|
---|
905 | case 3:
|
---|
906 | rv = bitmap_decompress3(output, width, height, input, size);
|
---|
907 | break;
|
---|
908 | case 4:
|
---|
909 | rv = bitmap_decompress4(output, width, height, input, size);
|
---|
910 | break;
|
---|
911 | default:
|
---|
912 | unimpl("Bpp %d\n", Bpp);
|
---|
913 | break;
|
---|
914 | }
|
---|
915 | return rv;
|
---|
916 | }
|
---|
917 |
|
---|
918 | /* *INDENT-ON* */
|
---|