| 1 |
;;================================================================================================;; |
1 |
;;================================================================================================;; |
| 2 |
;;//// pcx.asm //// (c) dunkaist, 2010 ///////////////////////////////////////////////////////////;; |
2 |
;;//// pcx.asm //// (c) dunkaist, 2010 ///////////////////////////////////////////////////////////;; |
| 3 |
;;================================================================================================;; |
3 |
;;================================================================================================;; |
| 4 |
;; ;; |
4 |
;; ;; |
| 5 |
;; This file is part of Common development libraries (Libs-Dev). ;; |
5 |
;; This file is part of Common development libraries (Libs-Dev). ;; |
| 6 |
;; ;; |
6 |
;; ;; |
| 7 |
;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;; |
7 |
;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;; |
| 8 |
;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;; |
8 |
;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;; |
| 9 |
;; of the License, or (at your option) any later version. ;; |
9 |
;; of the License, or (at your option) any later version. ;; |
| 10 |
;; ;; |
10 |
;; ;; |
| 11 |
;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without ;; |
11 |
;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without ;; |
| 12 |
;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;; |
12 |
;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;; |
| 13 |
;; Lesser General Public License for more details. ;; |
13 |
;; Lesser General Public License for more details. ;; |
| 14 |
;; ;; |
14 |
;; ;; |
| 15 |
;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev. ;; |
15 |
;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev. ;; |
| 16 |
;; If not, see . ;; |
16 |
;; If not, see . ;; |
| 17 |
;; ;; |
17 |
;; ;; |
| 18 |
;;================================================================================================;; |
18 |
;;================================================================================================;; |
| 19 |
|
19 |
|
| 20 |
include 'pcx.inc' |
20 |
include 'pcx.inc' |
| 21 |
include '../../../../system/board/trunk/debug.inc' |
21 |
;include '../../../../system/board/trunk/debug.inc' |
| 22 |
|
22 |
|
| 23 |
;;================================================================================================;; |
23 |
;;================================================================================================;; |
| 24 |
proc img.is.pcx _data, _length ;//////////////////////////////////////////////////////////////////;; |
24 |
proc img.is.pcx _data, _length ;//////////////////////////////////////////////////////////////////;; |
| 25 |
;;------------------------------------------------------------------------------------------------;; |
25 |
;;------------------------------------------------------------------------------------------------;; |
| 26 |
;? Determine if raw data could be decoded (is in Targa format) ;; |
26 |
;? Determine if raw data could be decoded (is in Targa format) ;; |
| 27 |
;;------------------------------------------------------------------------------------------------;; |
27 |
;;------------------------------------------------------------------------------------------------;; |
| 28 |
;> _data = raw data as read from file/stream ;; |
28 |
;> _data = raw data as read from file/stream ;; |
| 29 |
;> _length = data length ;; |
29 |
;> _length = data length ;; |
| 30 |
;;------------------------------------------------------------------------------------------------;; |
30 |
;;------------------------------------------------------------------------------------------------;; |
| 31 |
;< eax = false / true ;; |
31 |
;< eax = false / true ;; |
| 32 |
;;================================================================================================;; |
32 |
;;================================================================================================;; |
| 33 |
|
33 |
|
| 34 |
push ecx edi |
34 |
push ecx edi |
| 35 |
xor eax, eax |
35 |
xor eax, eax |
| 36 |
|
36 |
|
| 37 |
mov edi, [_data] |
37 |
mov edi, [_data] |
| 38 |
|
38 |
|
| 39 |
cmp [edi+pcx_header.magic_number], 10 |
39 |
cmp [edi+pcx_header.magic_number], 10 |
| 40 |
jne .is_not_pcx |
40 |
jne .is_not_pcx |
| 41 |
cmp [edi+pcx_header.version], 5 |
41 |
cmp [edi+pcx_header.version], 5 |
| 42 |
jne .is_not_pcx |
42 |
jne .is_not_pcx |
| 43 |
cmp [edi+pcx_header.encoding], 1 |
43 |
cmp [edi+pcx_header.encoding], 1 |
| 44 |
jne .is_not_pcx |
44 |
jne .is_not_pcx |
| 45 |
cmp [edi+pcx_header.reserved], 0 |
45 |
cmp [edi+pcx_header.reserved], 0 |
| 46 |
jne .is_not_pcx |
46 |
jne .is_not_pcx |
| 47 |
|
47 |
|
| 48 |
add edi, pcx_header.filler |
48 |
add edi, pcx_header.filler |
| 49 |
xor al, al |
49 |
xor al, al |
| 50 |
mov ecx, 58 |
50 |
mov ecx, 58 |
| 51 |
cld |
51 |
cld |
| 52 |
repe scasb |
52 |
repe scasb |
| 53 |
test ecx, ecx |
53 |
test ecx, ecx |
| 54 |
jnz .is_not_pcx |
54 |
jnz .is_not_pcx |
| 55 |
|
55 |
|
| 56 |
.is_pcx: |
56 |
.is_pcx: |
| 57 |
inc eax |
57 |
inc eax |
| 58 |
|
58 |
|
| 59 |
.is_not_pcx: |
59 |
.is_not_pcx: |
| 60 |
pop edi ecx |
60 |
pop edi ecx |
| 61 |
ret |
61 |
ret |
| 62 |
|
62 |
|
| 63 |
endp |
63 |
endp |
| 64 |
|
64 |
|
| 65 |
;;================================================================================================;; |
65 |
;;================================================================================================;; |
| 66 |
proc img.decode.pcx _data, _length, _options ;////////////////////////////////////////////////////;; |
66 |
proc img.decode.pcx _data, _length, _options ;////////////////////////////////////////////////////;; |
| 67 |
;;------------------------------------------------------------------------------------------------;; |
67 |
;;------------------------------------------------------------------------------------------------;; |
| 68 |
;? Decode data into image if it contains correctly formed raw data in Targa format ;; |
68 |
;? Decode data into image if it contains correctly formed raw data in Targa format ;; |
| 69 |
;;------------------------------------------------------------------------------------------------;; |
69 |
;;------------------------------------------------------------------------------------------------;; |
| 70 |
;> _data = raw data as read from file/stream ;; |
70 |
;> _data = raw data as read from file/stream ;; |
| 71 |
;> _length = data length ;; |
71 |
;> _length = data length ;; |
| 72 |
;;------------------------------------------------------------------------------------------------;; |
72 |
;;------------------------------------------------------------------------------------------------;; |
| 73 |
;< eax = 0 (error) or pointer to image ;; |
73 |
;< eax = 0 (error) or pointer to image ;; |
| 74 |
;;================================================================================================;; |
74 |
;;================================================================================================;; |
| 75 |
locals |
75 |
locals |
| 76 |
nplanes rd 1 |
76 |
nplanes rd 1 |
| 77 |
xsize rw 1 |
77 |
xsize rw 1 |
| 78 |
ysize rw 1 |
78 |
ysize rw 1 |
| 79 |
bpl rw 1 |
79 |
bpl rw 1 |
| 80 |
total_bpl rd 1 |
80 |
total_bpl rd 1 |
| 81 |
line_begin rd 1 |
81 |
line_begin rd 1 |
| 82 |
retvalue rd 1 ; 0 (error) or pointer to image |
82 |
retvalue rd 1 ; 0 (error) or pointer to image |
| 83 |
endl |
83 |
endl |
| 84 |
|
84 |
|
| 85 |
pusha |
85 |
pusha |
| 86 |
|
86 |
|
| 87 |
mov esi, [_data] |
87 |
mov esi, [_data] |
| 88 |
movzx eax, byte[esi+pcx_header.nplanes] |
88 |
movzx eax, byte[esi+pcx_header.nplanes] |
| 89 |
mov [nplanes], eax |
89 |
mov [nplanes], eax |
| 90 |
mov bx, word[esi+pcx_header.bpl] |
90 |
mov bx, word[esi+pcx_header.bpl] |
| 91 |
mov [bpl], bx |
91 |
mov [bpl], bx |
| 92 |
mul bx |
92 |
mul bx |
| 93 |
shl eax, 16 |
93 |
shl eax, 16 |
| 94 |
mov ax, dx |
94 |
mov ax, dx |
| 95 |
ror eax, 16 |
95 |
ror eax, 16 |
| 96 |
mov [total_bpl], eax |
96 |
mov [total_bpl], eax |
| 97 |
|
97 |
|
| 98 |
movzx eax, word[esi+pcx_header.xmax] |
98 |
movzx eax, word[esi+pcx_header.xmax] |
| 99 |
inc ax |
99 |
inc ax |
| 100 |
sub ax, word[esi+pcx_header.xmin] |
100 |
sub ax, word[esi+pcx_header.xmin] |
| 101 |
mov [xsize], ax |
101 |
mov [xsize], ax |
| 102 |
|
102 |
|
| 103 |
movzx ebx, word[esi+pcx_header.ymax] |
103 |
movzx ebx, word[esi+pcx_header.ymax] |
| 104 |
inc bx |
104 |
inc bx |
| 105 |
sub bx, word[esi+pcx_header.ymin] |
105 |
sub bx, word[esi+pcx_header.ymin] |
| 106 |
mov [ysize], bx |
106 |
mov [ysize], bx |
| 107 |
|
107 |
|
| 108 |
|
108 |
|
| 109 |
cmp [esi+pcx_header.bpp], 1 |
109 |
cmp [esi+pcx_header.bpp], 1 |
| 110 |
jz .monochrome |
110 |
jz .monochrome |
| 111 |
cmp byte[esi+pcx_header.nplanes], 3 |
111 |
cmp byte[esi+pcx_header.nplanes], 3 |
| 112 |
jnz .indexed |
112 |
jnz .indexed |
| 113 |
|
113 |
|
| 114 |
|
114 |
|
| 115 |
._24bit: |
115 |
._24bit: |
| 116 |
|
116 |
|
| 117 |
stdcall img.create, eax, ebx, Image.bpp24 |
117 |
stdcall img.create, eax, ebx, Image.bpp24 |
| 118 |
mov [retvalue], eax |
118 |
mov [retvalue], eax |
| 119 |
test eax, eax |
119 |
test eax, eax |
| 120 |
jz .quit |
120 |
jz .quit |
| 121 |
|
121 |
|
| 122 |
movzx ebx, [xsize] |
122 |
movzx ebx, [xsize] |
| 123 |
movzx ecx, [ysize] |
123 |
movzx ecx, [ysize] |
| 124 |
mov edx, [eax+Image.Data] |
124 |
mov edx, [eax+Image.Data] |
| 125 |
|
125 |
|
| 126 |
rol ebx, 16 |
126 |
rol ebx, 16 |
| 127 |
or ebx, ecx |
127 |
or ebx, ecx |
| 128 |
xor ebx, [edx] |
128 |
xor ebx, [edx] |
| 129 |
mov [eax+Image.Checksum], ebx |
129 |
mov [eax+Image.Checksum], ebx |
| 130 |
|
130 |
|
| 131 |
|
131 |
|
| 132 |
mov esi, [_data] |
132 |
mov esi, [_data] |
| 133 |
add esi, 128 |
133 |
add esi, 128 |
| 134 |
; mov edi, [retvalue] |
134 |
; mov edi, [retvalue] |
| 135 |
mov edi, [eax+Image.Data] |
135 |
mov edi, [eax+Image.Data] |
| 136 |
add edi, 2 |
136 |
add edi, 2 |
| 137 |
mov [line_begin], edi |
137 |
mov [line_begin], edi |
| 138 |
mov ebx, [total_bpl] |
138 |
mov ebx, [total_bpl] |
| 139 |
|
139 |
|
| 140 |
._24bit.begin: |
140 |
._24bit.begin: |
| 141 |
mov ax, word[bpl] |
141 |
mov ax, word[bpl] |
| 142 |
._24bit.decode: |
142 |
._24bit.decode: |
| 143 |
call get_byte |
143 |
call get_byte |
| 144 |
._24bit.write_sequence: |
144 |
._24bit.write_sequence: |
| 145 |
mov [edi], dl |
145 |
mov [edi], dl |
| 146 |
dec ax |
146 |
dec ax |
| 147 |
add edi, [nplanes] |
147 |
add edi, [nplanes] |
| 148 |
dec dh |
148 |
dec dh |
| 149 |
jnz ._24bit.write_sequence |
149 |
jnz ._24bit.write_sequence |
| 150 |
|
150 |
|
| 151 |
test ax, ax |
151 |
test ax, ax |
| 152 |
jz ._24bit.end_color_line |
152 |
jz ._24bit.end_color_line |
| 153 |
jmp ._24bit.decode |
153 |
jmp ._24bit.decode |
| 154 |
|
154 |
|
| 155 |
._24bit.end_color_line: |
155 |
._24bit.end_color_line: |
| 156 |
test ebx, ebx |
156 |
test ebx, ebx |
| 157 |
jz ._24bit.end_full_line |
157 |
jz ._24bit.end_full_line |
| 158 |
dec [line_begin] |
158 |
dec [line_begin] |
| 159 |
mov edi, [line_begin] |
159 |
mov edi, [line_begin] |
| 160 |
jmp ._24bit.begin |
160 |
jmp ._24bit.begin |
| 161 |
|
161 |
|
| 162 |
._24bit.end_full_line: |
162 |
._24bit.end_full_line: |
| 163 |
dec word[ysize] |
163 |
dec word[ysize] |
| 164 |
jz .quit |
164 |
jz .quit |
| 165 |
mov ebx, [total_bpl] |
165 |
mov ebx, [total_bpl] |
| 166 |
add edi, 2 |
166 |
add edi, 2 |
| 167 |
mov [line_begin], edi |
167 |
mov [line_begin], edi |
| 168 |
jmp ._24bit.begin |
168 |
jmp ._24bit.begin |
| 169 |
|
169 |
|
| 170 |
|
170 |
|
| 171 |
.indexed: |
171 |
.indexed: |
| 172 |
|
172 |
|
| 173 |
stdcall img.create, eax, ebx, Image.bpp8 |
173 |
stdcall img.create, eax, ebx, Image.bpp8 |
| 174 |
mov [retvalue], eax |
174 |
mov [retvalue], eax |
| 175 |
test eax, eax |
175 |
test eax, eax |
| 176 |
jz .quit |
176 |
jz .quit |
| 177 |
|
177 |
|
| 178 |
movzx ebx, [xsize] |
178 |
movzx ebx, [xsize] |
| 179 |
movzx ecx, [ysize] |
179 |
movzx ecx, [ysize] |
| 180 |
mov edx, [eax+Image.Data] |
180 |
mov edx, [eax+Image.Data] |
| 181 |
|
181 |
|
| 182 |
rol ebx, 16 |
182 |
rol ebx, 16 |
| 183 |
or ebx, ecx |
183 |
or ebx, ecx |
| 184 |
xor ebx, [edx] |
184 |
xor ebx, [edx] |
| 185 |
mov [eax+Image.Checksum], ebx |
185 |
mov [eax+Image.Checksum], ebx |
| 186 |
|
186 |
|
| 187 |
mov esi, [_data] |
187 |
mov esi, [_data] |
| 188 |
add esi, [_length] |
188 |
add esi, [_length] |
| 189 |
sub esi, 768 |
189 |
sub esi, 768 |
| 190 |
mov edi, [eax+Image.Palette] |
190 |
mov edi, [eax+Image.Palette] |
| 191 |
mov cx, 256 |
191 |
mov cx, 256 |
| 192 |
@@: |
192 |
@@: |
| 193 |
mov ebx, [esi] |
193 |
mov ebx, [esi] |
| 194 |
bswap ebx |
194 |
bswap ebx |
| 195 |
shr ebx, 8 |
195 |
shr ebx, 8 |
| 196 |
mov [edi], ebx |
196 |
mov [edi], ebx |
| 197 |
add edi, 4 |
197 |
add edi, 4 |
| 198 |
add esi, 3 |
198 |
add esi, 3 |
| 199 |
dec cx |
199 |
dec cx |
| 200 |
jnz @b |
200 |
jnz @b |
| 201 |
|
201 |
|
| 202 |
mov esi, [_data] |
202 |
mov esi, [_data] |
| 203 |
add esi, 128 |
203 |
add esi, 128 |
| 204 |
; mov edi, [retvalue] |
204 |
; mov edi, [retvalue] |
| 205 |
mov edi, [eax+Image.Data] |
205 |
mov edi, [eax+Image.Data] |
| 206 |
|
206 |
|
| 207 |
.indexed.begin: |
207 |
.indexed.begin: |
| 208 |
mov ax, word[bpl] |
208 |
mov ax, word[bpl] |
| 209 |
.indexed.decode: |
209 |
.indexed.decode: |
| 210 |
call get_byte |
210 |
call get_byte |
| 211 |
.indexed.write_sequence: |
211 |
.indexed.write_sequence: |
| 212 |
mov [edi], dl |
212 |
mov [edi], dl |
| 213 |
inc edi |
213 |
inc edi |
| 214 |
dec ax |
214 |
dec ax |
| 215 |
dec dh |
215 |
dec dh |
| 216 |
jnz .indexed.write_sequence |
216 |
jnz .indexed.write_sequence |
| 217 |
|
217 |
|
| 218 |
test ax, ax |
218 |
test ax, ax |
| 219 |
jz .indexed.end_line |
219 |
jz .indexed.end_line |
| 220 |
jmp .indexed.decode |
220 |
jmp .indexed.decode |
| 221 |
|
221 |
|
| 222 |
.indexed.end_line: |
222 |
.indexed.end_line: |
| 223 |
dec word[ysize] |
223 |
dec word[ysize] |
| 224 |
jz .quit |
224 |
jz .quit |
| 225 |
jmp .indexed.begin |
225 |
jmp .indexed.begin |
| 226 |
|
226 |
|
| 227 |
|
227 |
|
| 228 |
.monochrome: |
228 |
.monochrome: |
| 229 |
|
229 |
|
| 230 |
stdcall img.create, eax, ebx, Image.bpp1 |
230 |
stdcall img.create, eax, ebx, Image.bpp1 |
| 231 |
mov [retvalue], eax |
231 |
mov [retvalue], eax |
| 232 |
test eax, eax |
232 |
test eax, eax |
| 233 |
jz .quit |
233 |
jz .quit |
| 234 |
|
234 |
|
| 235 |
movzx ebx, [xsize] |
235 |
movzx ebx, [xsize] |
| 236 |
movzx ecx, [ysize] |
236 |
movzx ecx, [ysize] |
| 237 |
mov edx, [eax+Image.Data] |
237 |
mov edx, [eax+Image.Data] |
| 238 |
|
238 |
|
| 239 |
rol ebx, 16 |
239 |
rol ebx, 16 |
| 240 |
or ebx, ecx |
240 |
or ebx, ecx |
| 241 |
xor ebx, [edx] |
241 |
xor ebx, [edx] |
| 242 |
mov [eax+Image.Checksum], ebx |
242 |
mov [eax+Image.Checksum], ebx |
| 243 |
|
243 |
|
| 244 |
mov edi, [eax+Image.Palette] |
244 |
mov edi, [eax+Image.Palette] |
| 245 |
mov [edi], dword 0x00000000 |
245 |
mov [edi], dword 0x00000000 |
| 246 |
mov [edi+4], dword 0x00ffffff |
246 |
mov [edi+4], dword 0x00ffffff |
| 247 |
|
247 |
|
| 248 |
mov esi, [_data] |
248 |
mov esi, [_data] |
| 249 |
add esi, 128 |
249 |
add esi, 128 |
| 250 |
; mov edi, [retvalue] |
250 |
; mov edi, [retvalue] |
| 251 |
mov edi, [eax+Image.Data] |
251 |
mov edi, [eax+Image.Data] |
| 252 |
|
252 |
|
| 253 |
|
253 |
|
| 254 |
.monochrome.begin: |
254 |
.monochrome.begin: |
| 255 |
mov ebx, [total_bpl] |
255 |
mov ebx, [total_bpl] |
| 256 |
mov ax, [xsize] |
256 |
mov ax, [xsize] |
| 257 |
|
257 |
|
| 258 |
.monochrome.decode: |
258 |
.monochrome.decode: |
| 259 |
call get_byte |
259 |
call get_byte |
| 260 |
.monochrome.write_sequence: |
260 |
.monochrome.write_sequence: |
| 261 |
mov [edi], dl |
261 |
mov [edi], dl |
| 262 |
inc edi |
262 |
inc edi |
| 263 |
cmp ax, 8 |
263 |
cmp ax, 8 |
| 264 |
jng .monochrome.is_last_byte_in_line |
264 |
jng .monochrome.is_last_byte_in_line |
| 265 |
sub ax, 8 |
265 |
sub ax, 8 |
| 266 |
dec dh |
266 |
dec dh |
| 267 |
jnz .monochrome.write_sequence |
267 |
jnz .monochrome.write_sequence |
| 268 |
jmp .monochrome.decode |
268 |
jmp .monochrome.decode |
| 269 |
|
269 |
|
| 270 |
.monochrome.is_last_byte_in_line: |
270 |
.monochrome.is_last_byte_in_line: |
| 271 |
test ebx, ebx |
271 |
test ebx, ebx |
| 272 |
jng @f |
272 |
jng @f |
| 273 |
call get_byte |
273 |
call get_byte |
| 274 |
jmp .monochrome.is_last_byte_in_line |
274 |
jmp .monochrome.is_last_byte_in_line |
| 275 |
@@: |
275 |
@@: |
| 276 |
dec word[ysize] |
276 |
dec word[ysize] |
| 277 |
jnz .monochrome.begin |
277 |
jnz .monochrome.begin |
| 278 |
jmp .quit |
278 |
jmp .quit |
| 279 |
|
279 |
|
| 280 |
|
280 |
|
| 281 |
.quit: |
281 |
.quit: |
| 282 |
popa |
282 |
popa |
| 283 |
mov eax, [retvalue] |
283 |
mov eax, [retvalue] |
| 284 |
ret |
284 |
ret |
| 285 |
|
285 |
|
| 286 |
endp |
286 |
endp |
| 287 |
|
287 |
|
| 288 |
|
288 |
|
| 289 |
|
289 |
|
| 290 |
;;================================================================================================;; |
290 |
;;================================================================================================;; |
| 291 |
proc img.encode.pcx _img, _p_length, _options ;///////////////////////////////////////////////////;; |
291 |
proc img.encode.pcx _img, _p_length, _options ;///////////////////////////////////////////////////;; |
| 292 |
;;------------------------------------------------------------------------------------------------;; |
292 |
;;------------------------------------------------------------------------------------------------;; |
| 293 |
;? Encode image into raw data in Targa format ;; |
293 |
;? Encode image into raw data in Targa format ;; |
| 294 |
;;------------------------------------------------------------------------------------------------;; |
294 |
;;------------------------------------------------------------------------------------------------;; |
| 295 |
;> _img = pointer to image ;; |
295 |
;> _img = pointer to image ;; |
| 296 |
;;------------------------------------------------------------------------------------------------;; |
296 |
;;------------------------------------------------------------------------------------------------;; |
| 297 |
;< eax = 0 (error) or pointer to encoded data ;; |
297 |
;< eax = 0 (error) or pointer to encoded data ;; |
| 298 |
;< _p_length = encoded data length ;; |
298 |
;< _p_length = encoded data length ;; |
| 299 |
;;================================================================================================;; |
299 |
;;================================================================================================;; |
| 300 |
xor eax, eax |
300 |
xor eax, eax |
| 301 |
ret |
301 |
ret |
| 302 |
endp |
302 |
endp |
| 303 |
|
303 |
|
| 304 |
|
304 |
|
| 305 |
;;================================================================================================;; |
305 |
;;================================================================================================;; |
| 306 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
306 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
| 307 |
;;================================================================================================;; |
307 |
;;================================================================================================;; |
| 308 |
;! Below are private procs you should never call directly from your code ;; |
308 |
;! Below are private procs you should never call directly from your code ;; |
| 309 |
;;================================================================================================;; |
309 |
;;================================================================================================;; |
| 310 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
310 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
| 311 |
;;================================================================================================;; |
311 |
;;================================================================================================;; |
| 312 |
proc get_byte |
312 |
proc get_byte |
| 313 |
|
313 |
|
| 314 |
mov dh, byte[esi] |
314 |
mov dh, byte[esi] |
| 315 |
inc esi |
315 |
inc esi |
| 316 |
cmp dh, 0xC0 |
316 |
cmp dh, 0xC0 |
| 317 |
jnb .cycle1 |
317 |
jnb .cycle1 |
| 318 |
mov dl, dh |
318 |
mov dl, dh |
| 319 |
mov dh, 1 |
319 |
mov dh, 1 |
| 320 |
jmp .exit1 |
320 |
jmp .exit1 |
| 321 |
.cycle1: |
321 |
.cycle1: |
| 322 |
and dh, 0x3F |
322 |
and dh, 0x3F |
| 323 |
mov dl, byte[esi] |
323 |
mov dl, byte[esi] |
| 324 |
inc esi |
324 |
inc esi |
| 325 |
.exit1: |
325 |
.exit1: |
| 326 |
movzx ecx, dh |
326 |
movzx ecx, dh |
| 327 |
sub ebx, ecx |
327 |
sub ebx, ecx |
| 328 |
|
328 |
|
| 329 |
ret |
329 |
ret |
| 330 |
endp |
330 |
endp |
| 331 |
;;================================================================================================;; |
331 |
;;================================================================================================;; |
| 332 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
332 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
| 333 |
;;================================================================================================;; |
333 |
;;================================================================================================;; |
| 334 |
;! Below is private data you should never use directly from your code ;; |
334 |
;! Below is private data you should never use directly from your code ;; |
| 335 |
;;================================================================================================;; |
335 |
;;================================================================================================;; |
| 336 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
336 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
| 337 |
;;================================================================================================;; |
337 |
;;================================================================================================;; |
| 338 |
|
338 |
|
| 339 |
; |
339 |
; |