26 |
#define REPEAT(statement) { while ((count > 0) && (x < width)) { statement; count--; x++; } } |
#define REPEAT(statement) { while ((count > 0) && (x < width)) { statement; count--; x++; } } |
27 |
#define MASK_UPDATE() { mixmask <<= 1; if (mixmask == 0) { mask = CVAL(input); mixmask = 1; } } |
#define MASK_UPDATE() { mixmask <<= 1; if (mixmask == 0) { mask = CVAL(input); mixmask = 1; } } |
28 |
|
|
29 |
BOOL bitmap_decompress(unsigned char *output, int width, int height, |
BOOL |
30 |
unsigned char *input, int size) |
bitmap_decompress(unsigned char *output, int width, int height, |
31 |
|
unsigned char *input, int size) |
32 |
{ |
{ |
33 |
unsigned char *end = input + size; |
unsigned char *end = input + size; |
34 |
unsigned char *prevline = NULL, *line = NULL; |
unsigned char *prevline = NULL, *line = NULL; |
88 |
mixmask = 0; |
mixmask = 0; |
89 |
switch (opcode) |
switch (opcode) |
90 |
{ |
{ |
91 |
case 0: /* Fill */ |
case 0: /* Fill */ |
92 |
if ((lastopcode == opcode) |
if ((lastopcode == opcode) |
93 |
&& !((x == width) && (prevline == NULL))) |
&& !((x == width) && (prevline == NULL))) |
94 |
insertmix = True; |
insertmix = True; |
95 |
break; |
break; |
96 |
case 8: /* Bicolour */ |
case 8: /* Bicolour */ |
97 |
colour1 = CVAL(input); |
colour1 = CVAL(input); |
98 |
case 3: /* Colour */ |
case 3: /* Colour */ |
99 |
colour2 = CVAL(input); |
colour2 = CVAL(input); |
100 |
break; |
break; |
101 |
case 6: /* SetMix/Mix */ |
case 6: /* SetMix/Mix */ |
102 |
case 7: /* SetMix/FillOrMix */ |
case 7: /* SetMix/FillOrMix */ |
103 |
mix = CVAL(input); |
mix = CVAL(input); |
104 |
opcode -= 5; |
opcode -= 5; |
105 |
break; |
break; |
123 |
|
|
124 |
switch (opcode) |
switch (opcode) |
125 |
{ |
{ |
126 |
case 0: /* Fill */ |
case 0: /* Fill */ |
127 |
if (insertmix) |
if (insertmix) |
128 |
{ |
{ |
129 |
if (prevline == NULL) |
if (prevline == NULL) |
130 |
line[x] = mix; |
line[x] = mix; |
131 |
else |
else |
132 |
line[x] = prevline[x] ^ mix; |
line[x] = |
133 |
|
prevline[x] ^ |
134 |
|
mix; |
135 |
|
|
136 |
insertmix = False; |
insertmix = False; |
137 |
count--; |
count--; |
139 |
} |
} |
140 |
|
|
141 |
if (prevline == NULL) |
if (prevline == NULL) |
142 |
REPEAT(line[x] = 0) |
{ |
143 |
|
REPEAT(line[x] = 0); |
144 |
|
} |
145 |
else |
else |
146 |
REPEAT(line[x] = prevline[x]) |
{ |
147 |
|
REPEAT(line[x] = prevline[x]); |
148 |
|
} |
149 |
break; |
break; |
150 |
|
|
151 |
case 1: /* Mix */ |
case 1: /* Mix */ |
152 |
if (prevline == NULL) |
if (prevline == NULL) |
153 |
REPEAT(line[x] = mix) |
{ |
154 |
|
REPEAT(line[x] = mix); |
155 |
|
} |
156 |
else |
else |
157 |
REPEAT(line[x] = prevline[x] ^ mix) |
{ |
158 |
|
REPEAT(line[x] = |
159 |
|
prevline[x] ^ mix); |
160 |
|
} |
161 |
break; |
break; |
162 |
|
|
163 |
case 2: /* Fill or Mix */ |
case 2: /* Fill or Mix */ |
164 |
if (prevline == NULL) |
if (prevline == NULL) |
165 |
REPEAT( |
{ |
166 |
MASK_UPDATE(); |
REPEAT(MASK_UPDATE(); |
167 |
|
if (mask & mixmask) |
168 |
if (mask & mixmask) |
line[x] = mix; |
169 |
line[x] = mix; |
else |
170 |
else |
line[x] = 0;); |
171 |
line[x] = 0; |
} |
|
) |
|
172 |
else |
else |
173 |
REPEAT( |
{ |
174 |
MASK_UPDATE(); |
REPEAT(MASK_UPDATE(); |
175 |
|
if (mask & mixmask) |
176 |
if (mask & mixmask) |
line[x] = |
177 |
line[x] = prevline[x] ^ mix; |
prevline[x] ^ mix; |
178 |
else |
else |
179 |
line[x] = prevline[x]; |
line[x] = |
180 |
) |
prevline[x];); |
181 |
|
} |
182 |
break; |
break; |
183 |
|
|
184 |
case 3: /* Colour */ |
case 3: /* Colour */ |
185 |
REPEAT(line[x] = colour2) |
REPEAT(line[x] = colour2); |
186 |
break; |
break; |
187 |
|
|
188 |
case 4: /* Copy */ |
case 4: /* Copy */ |
189 |
REPEAT(line[x] = CVAL(input)) |
REPEAT(line[x] = CVAL(input)); |
190 |
break; |
break; |
191 |
|
|
192 |
case 8: /* Bicolour */ |
case 8: /* Bicolour */ |
193 |
REPEAT( |
REPEAT(if (bicolour) |
194 |
if (bicolour) |
{ |
195 |
{ |
line[x] = colour2; |
196 |
line[x] = colour2; |
bicolour = False;} |
197 |
bicolour = False; |
else |
198 |
} |
{ |
199 |
else |
line[x] = colour1; |
200 |
{ |
bicolour = True; count++;} |
201 |
line[x] = colour1; |
); |
|
bicolour = True; |
|
|
count++; |
|
|
} |
|
|
) |
|
202 |
break; |
break; |
203 |
|
|
204 |
case 13: /* White */ |
case 13: /* White */ |
205 |
REPEAT(line[x] = 0xff) |
REPEAT(line[x] = 0xff); |
206 |
break; |
break; |
207 |
|
|
208 |
case 14: /* Black */ |
case 14: /* Black */ |
209 |
REPEAT(line[x] = 0x00) |
REPEAT(line[x] = 0x00); |
210 |
break; |
break; |
211 |
|
|
212 |
default: |
default: |
213 |
NOTIMP("bitmap opcode 0x%x\n", opcode); |
NOTIMP("bitmap opcode 0x%x\n", |
214 |
|
opcode); |
215 |
return False; |
return False; |
216 |
} |
} |
217 |
} |
} |