1 /*
2 * PC Paintbrush PCX (.pcx) image decoder
3 * Copyright (c) 2007, 2008 Ivo van Poorten
4 *
5 * This decoder does not support CGA palettes. I am unable to find samples
6 * and Netpbm cannot generate them.
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
30
33 unsigned int bytes_per_scanline,
34 int compressed)
35 {
36 unsigned int i = 0;
38
39 if (compressed) {
41 run = 1;
42 value = bytestream2_get_byte(gb);
44 run = value & 0x3f;
45 value = bytestream2_get_byte(gb);
46 }
47 while (i < bytes_per_scanline && run--)
49 }
50 } else {
52 }
53 }
54
56 {
57 int i;
58
60 for (i = 0; i < pallen; i++)
61 *dst++ = 0xFF000000 | bytestream2_get_be24u(gb);
62 if (pallen < 256)
63 memset(dst, 0, (256 - pallen) * sizeof(*dst));
64 }
65
68 {
71 int compressed, xmin, ymin, xmax, ymax;
73 unsigned int w, h, bits_per_pixel, bytes_per_line, nplanes,
stride,
y, x,
74 bytes_per_scanline;
76
77 if (avpkt->
size < 128)
79
81
82 if (bytestream2_get_byteu(&gb) != 0x0a || bytestream2_get_byteu(&gb) > 5) {
85 }
86
87 compressed = bytestream2_get_byteu(&gb);
88 bits_per_pixel = bytestream2_get_byteu(&gb);
89 xmin = bytestream2_get_le16u(&gb);
90 ymin = bytestream2_get_le16u(&gb);
91 xmax = bytestream2_get_le16u(&gb);
92 ymax = bytestream2_get_le16u(&gb);
95
96 if (xmax < xmin || ymax < ymin) {
99 }
100
101 w = xmax - xmin + 1;
102 h = ymax - ymin + 1;
103
105 nplanes = bytestream2_get_byteu(&gb);
106 bytes_per_line = bytestream2_get_le16u(&gb);
107 bytes_per_scanline = nplanes * bytes_per_line;
108
109 if (bytes_per_scanline < (w * bits_per_pixel * nplanes + 7) / 8 ||
113 }
114
115 switch ((nplanes << 8) + bits_per_pixel) {
116 case 0x0308:
118 break;
119 case 0x0108:
120 case 0x0104:
121 case 0x0102:
122 case 0x0101:
123 case 0x0401:
124 case 0x0301:
125 case 0x0201:
127 break;
128 default:
131 }
132
134
137
140
142
145
147 if (!scanline)
149
150 if (nplanes == 3 && bits_per_pixel == 8) {
151 for (y = 0; y < h; y++) {
153
154 for (x = 0; x < w; x++) {
155 ptr[3 * x] = scanline[x];
156 ptr[3 * x + 1] = scanline[x + bytes_per_line];
157 ptr[3 * x + 2] = scanline[x + (bytes_per_line << 1)];
158 }
159
160 ptr += stride;
161 }
162 } else if (nplanes == 1 && bits_per_pixel == 8) {
163 int palstart = avpkt->
size - 769;
164
165 if (avpkt->
size < 769) {
170 }
171
172 for (y = 0; y < h; y++, ptr += stride) {
174 memcpy(ptr, scanline, w);
175 }
176
180 }
181 if (bytestream2_get_byte(&gb) != 12) {
186 }
187 } else if (nplanes == 1) { /* all packed formats, max. 16 colors */
189
190 for (y = 0; y < h; y++) {
192
194
195 for (x = 0; x < w; x++)
196 ptr[x] =
get_bits(&s, bits_per_pixel);
197 ptr += stride;
198 }
199 } else { /* planar, 4, 8 or 16 colors */
200 int i;
201
202 for (y = 0; y < h; y++) {
204
205 for (x = 0; x < w; x++) {
206 int m = 0x80 >> (x & 7),
v = 0;
207 for (i = nplanes - 1; i >= 0; i--) {
209 v += !!(scanline[i * bytes_per_line + (x >> 3)] & m);
210 }
212 }
213 ptr += stride;
214 }
215 }
216
218 if (nplanes == 1 && bits_per_pixel == 8) {
220 ret += 256 * 3;
221 } else if (bits_per_pixel * nplanes == 1) {
224 } else if (bits_per_pixel < 8) {
227 }
228
229 *got_frame = 1;
230
234 }
235
243 };