blob: 90d8e6da9de7b25112c696cd369e7435f7e7ee85 [file] [log] [blame]
Pierre Ossman67b2b2f2009-03-06 10:12:55 +00001/* Copyright 2009 Pierre Ossman for Cendio AB
2 *
3 * This is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This software is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this software; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
16 * USA.
17 */
18
19namespace rfb {
20
21
22inline Pixel PixelFormat::pixelFromBuffer(const rdr::U8* buffer) const
23{
24 Pixel p;
25
26 p = 0;
27
28 if (bigEndian) {
29 switch (bpp) {
30 case 32:
31 p |= ((Pixel)*(buffer++)) << 24;
32 p |= ((Pixel)*(buffer++)) << 16;
33 case 16:
34 p |= ((Pixel)*(buffer++)) << 8;
35 case 8:
36 p |= *buffer;
37 }
38 } else {
39 p |= buffer[0];
40 if (bpp >= 16) {
41 p |= ((Pixel)buffer[1]) << 8;
Pierre Ossman67e7b292009-03-09 09:52:54 +000042 if (bpp == 32) {
Pierre Ossman67b2b2f2009-03-06 10:12:55 +000043 p |= ((Pixel)buffer[2]) << 16;
Pierre Ossman67e7b292009-03-09 09:52:54 +000044 p |= ((Pixel)buffer[3]) << 24;
45 }
Pierre Ossman67b2b2f2009-03-06 10:12:55 +000046 }
47 }
48
49 return p;
50}
51
52
Pierre Ossman19501b82009-03-31 14:06:53 +000053inline void PixelFormat::bufferFromPixel(rdr::U8* buffer, Pixel p) const
54{
55 if (bigEndian) {
56 switch (bpp) {
57 case 32:
58 *(buffer++) = (p >> 24) & 0xff;
59 *(buffer++) = (p >> 16) & 0xff;
60 case 16:
61 *(buffer++) = (p >> 8) & 0xff;
62 case 8:
63 *(buffer++) = (p >> 0) & 0xff;
64 }
65 } else {
66 buffer[0] = (p >> 0) & 0xff;
67 if (bpp >= 16) {
68 buffer[1] = (p >> 8) & 0xff;
69 if (bpp == 32) {
70 buffer[2] = (p >> 16) & 0xff;
71 buffer[3] = (p >> 24) & 0xff;
72 }
73 }
74 }
75}
76
77
Pierre Ossman67b2b2f2009-03-06 10:12:55 +000078inline void PixelFormat::rgbFromPixel(Pixel p, ColourMap* cm, rdr::U16 *r, rdr::U16 *g, rdr::U16 *b) const
79{
80 if (trueColour) {
81 /* We don't need to mask since we shift out unwanted bits */
82 *r = (p >> redShift) << redConvShift;
83 *g = (p >> greenShift) << greenConvShift;
84 *b = (p >> blueShift) << blueConvShift;
85 } else if (cm) {
86 int ir, ig, ib;
87 cm->lookup(p, &ir, &ig, &ib);
88 *r = ir;
89 *g = ig;
90 *b = ib;
91 } else {
92 // XXX just return 0 for colour map?
93 *r = 0;
94 *g = 0;
95 *b = 0;
96 }
97}
98
99
100inline void PixelFormat::rgbFromPixel(Pixel p, ColourMap* cm, rdr::U8 *r, rdr::U8 *g, rdr::U8 *b) const
101{
102 if (trueColour) {
103 *r = (p >> redShift) << (redConvShift - 8);
104 *g = (p >> greenShift) << (greenConvShift - 8);
105 *b = (p >> blueShift) << (blueConvShift - 8);
106 } else {
107 rdr::U16 r2, g2, b2;
108
109 rgbFromPixel(p, cm, &r2, &g2, &b2);
110
111 *r = r2 >> 8;
112 *g = g2 >> 8;
113 *b = b2 >> 8;
114 }
115}
116
117
118}
119