23 |
#define CVAL(p) (*(p++)) |
#define CVAL(p) (*(p++)) |
24 |
#define SVAL(p) ((*((p++) + 1) << 8) | CVAL(p)) |
#define SVAL(p) ((*((p++) + 1) << 8) | CVAL(p)) |
25 |
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|
26 |
#define REPEAT(statement) { while ((count > 0) && (x < width)) { statement; count--; x++; } } |
#define UNROLL8(exp) { exp exp exp exp exp exp exp exp } |
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#define MASK_UPDATE() { mixmask <<= 1; if (mixmask == 0) { mask = CVAL(input); mixmask = 1; } } |
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27 |
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28 |
BOOL bitmap_decompress(unsigned char *output, int width, int height, |
#define REPEAT(statement) \ |
29 |
unsigned char *input, int size) |
{ \ |
30 |
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while((count & ~0x7) && ((x+8) < width)) \ |
31 |
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UNROLL8( statement; count--; x++; ); \ |
32 |
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\ |
33 |
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while((count > 0) && (x < width)) { statement; count--; x++; } \ |
34 |
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} |
35 |
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36 |
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#define MASK_UPDATE() \ |
37 |
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{ \ |
38 |
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mixmask <<= 1; \ |
39 |
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if (mixmask == 0) \ |
40 |
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{ \ |
41 |
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mask = fom_mask ? fom_mask : CVAL(input); \ |
42 |
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mixmask = 1; \ |
43 |
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} \ |
44 |
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} |
45 |
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46 |
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BOOL |
47 |
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bitmap_decompress(unsigned char *output, int width, int height, |
48 |
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unsigned char *input, int size) |
49 |
{ |
{ |
50 |
unsigned char *end = input + size; |
unsigned char *end = input + size; |
51 |
unsigned char *prevline = NULL, *line = NULL; |
unsigned char *prevline = NULL, *line = NULL; |
52 |
int opcode, count, offset, isfillormix, x = width; |
int opcode, count, offset, isfillormix, x = width; |
53 |
int lastopcode = -1, insertmix = False; |
int lastopcode = -1, insertmix = False, bicolour = False; |
54 |
uint8 code, colour1 = 0, colour2 = 0; |
uint8 code, colour1 = 0, colour2 = 0; |
55 |
uint8 mixmask, mask = 0, mix = 0xff; |
uint8 mixmask, mask = 0, mix = 0xff; |
56 |
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int fom_mask = 0; |
57 |
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|
58 |
while (input < end) |
while (input < end) |
59 |
{ |
{ |
60 |
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fom_mask = 0; |
61 |
code = CVAL(input); |
code = CVAL(input); |
62 |
opcode = code >> 4; |
opcode = code >> 4; |
63 |
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|
74 |
|
|
75 |
case 0xf: |
case 0xf: |
76 |
opcode = code & 0xf; |
opcode = code & 0xf; |
77 |
count = (opcode < 13) ? SVAL(input) : 1; |
if (opcode < 9) |
78 |
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count = SVAL(input); |
79 |
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else |
80 |
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count = (opcode < 0xb) ? 8 : 1; |
81 |
offset = 0; |
offset = 0; |
82 |
break; |
break; |
83 |
|
|
107 |
} |
} |
108 |
|
|
109 |
/* Read preliminary data */ |
/* Read preliminary data */ |
|
mixmask = 0; |
|
110 |
switch (opcode) |
switch (opcode) |
111 |
{ |
{ |
112 |
case 0: /* Fill */ |
case 0: /* Fill */ |
113 |
if ((lastopcode == opcode) |
if ((lastopcode == opcode) |
114 |
&& !((x == width) && (prevline == NULL))) |
&& !((x == width) && (prevline == NULL))) |
115 |
insertmix = True; |
insertmix = True; |
116 |
break; |
break; |
117 |
case 8: /* Bicolour */ |
case 8: /* Bicolour */ |
118 |
colour1 = CVAL(input); |
colour1 = CVAL(input); |
119 |
case 3: /* Colour */ |
case 3: /* Colour */ |
120 |
colour2 = CVAL(input); |
colour2 = CVAL(input); |
121 |
break; |
break; |
122 |
case 6: /* SetMix/Mix */ |
case 6: /* SetMix/Mix */ |
123 |
case 7: /* SetMix/FillOrMix */ |
case 7: /* SetMix/FillOrMix */ |
124 |
mix = CVAL(input); |
mix = CVAL(input); |
125 |
opcode -= 5; |
opcode -= 5; |
126 |
break; |
break; |
127 |
|
case 9: /* FillOrMix_1 */ |
128 |
|
mask = 0x03; |
129 |
|
opcode = 0x02; |
130 |
|
fom_mask = 3; |
131 |
|
break; |
132 |
|
case 0x0a: /* FillOrMix_2 */ |
133 |
|
mask = 0x05; |
134 |
|
opcode = 0x02; |
135 |
|
fom_mask = 5; |
136 |
|
break; |
137 |
|
|
138 |
} |
} |
139 |
|
|
140 |
lastopcode = opcode; |
lastopcode = opcode; |
141 |
|
mixmask = 0; |
142 |
|
|
143 |
/* Output body */ |
/* Output body */ |
144 |
while (count > 0) |
while (count > 0) |
157 |
|
|
158 |
switch (opcode) |
switch (opcode) |
159 |
{ |
{ |
160 |
case 0: /* Fill */ |
case 0: /* Fill */ |
161 |
if (insertmix) |
if (insertmix) |
162 |
{ |
{ |
163 |
if (prevline == NULL) |
if (prevline == NULL) |
164 |
line[x] = mix; |
line[x] = mix; |
165 |
else |
else |
166 |
line[x] = prevline[x] ^ mix; |
line[x] = |
167 |
|
prevline[x] ^ |
168 |
|
mix; |
169 |
|
|
170 |
insertmix = False; |
insertmix = False; |
171 |
count--; |
count--; |
173 |
} |
} |
174 |
|
|
175 |
if (prevline == NULL) |
if (prevline == NULL) |
176 |
REPEAT(line[x] = 0) |
{ |
177 |
|
REPEAT(line[x] = 0); |
178 |
|
} |
179 |
else |
else |
180 |
REPEAT(line[x] = prevline[x]) |
{ |
181 |
|
REPEAT(line[x] = prevline[x]); |
182 |
|
} |
183 |
break; |
break; |
184 |
|
|
185 |
case 1: /* Mix */ |
case 1: /* Mix */ |
186 |
if (prevline == NULL) |
if (prevline == NULL) |
187 |
REPEAT(line[x] = mix) |
{ |
188 |
|
REPEAT(line[x] = mix); |
189 |
|
} |
190 |
else |
else |
191 |
REPEAT(line[x] = prevline[x] ^ mix) |
{ |
192 |
|
REPEAT(line[x] = |
193 |
|
prevline[x] ^ mix); |
194 |
|
} |
195 |
break; |
break; |
196 |
|
|
197 |
case 2: /* Fill or Mix */ |
case 2: /* Fill or Mix */ |
198 |
if (prevline == NULL) |
if (prevline == NULL) |
199 |
REPEAT( |
{ |
200 |
MASK_UPDATE(); |
REPEAT(MASK_UPDATE(); |
201 |
|
if (mask & mixmask) |
202 |
if (mask & mixmask) |
line[x] = mix; |
203 |
line[x] = mix; |
else |
204 |
else |
line[x] = 0;); |
205 |
line[x] = 0; |
} |
|
) |
|
206 |
else |
else |
207 |
REPEAT( |
{ |
208 |
MASK_UPDATE(); |
REPEAT(MASK_UPDATE(); |
209 |
|
if (mask & mixmask) |
210 |
if (mask & mixmask) |
line[x] = |
211 |
line[x] = prevline[x] ^ mix; |
prevline[x] ^ mix; |
212 |
else |
else |
213 |
line[x] = prevline[x]; |
line[x] = |
214 |
) |
prevline[x];); |
215 |
|
} |
216 |
break; |
break; |
217 |
|
|
218 |
case 3: /* Colour */ |
case 3: /* Colour */ |
219 |
REPEAT(line[x] = colour2) |
REPEAT(line[x] = colour2); |
220 |
break; |
break; |
221 |
|
|
222 |
case 4: /* Copy */ |
case 4: /* Copy */ |
223 |
REPEAT(line[x] = CVAL(input)) |
REPEAT(line[x] = CVAL(input)); |
224 |
break; |
break; |
225 |
|
|
226 |
case 8: /* Bicolour */ |
case 8: /* Bicolour */ |
227 |
REPEAT(line[x] = colour1; line[++x] = colour2) |
REPEAT(if (bicolour) |
228 |
|
{ |
229 |
|
line[x] = colour2; |
230 |
|
bicolour = False;} |
231 |
|
else |
232 |
|
{ |
233 |
|
line[x] = colour1; |
234 |
|
bicolour = True; count++;} |
235 |
|
); |
236 |
break; |
break; |
237 |
|
|
238 |
case 13: /* White */ |
case 0xd: /* White */ |
239 |
REPEAT(line[x] = 0xff) |
REPEAT(line[x] = 0xff); |
240 |
break; |
break; |
241 |
|
|
242 |
case 14: /* Black */ |
case 0xe: /* Black */ |
243 |
REPEAT(line[x] = 0x00) |
REPEAT(line[x] = 0x00); |
244 |
break; |
break; |
245 |
|
|
246 |
default: |
default: |
247 |
NOTIMP("bitmap opcode 0x%x\n", opcode); |
NOTIMP("bitmap opcode 0x%x\n", |
248 |
|
opcode); |
249 |
return False; |
return False; |
250 |
} |
} |
251 |
} |
} |