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/* Copyright 2009-2014 Pierre Ossman for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
namespace rfb {
inline Pixel PixelFormat::pixelFromBuffer(const rdr::U8* buffer) const
{
Pixel p;
p = 0;
if (bigEndian) {
switch (bpp) {
case 32:
p |= ((Pixel)*(buffer++)) << 24;
p |= ((Pixel)*(buffer++)) << 16;
case 16:
p |= ((Pixel)*(buffer++)) << 8;
case 8:
p |= *buffer;
}
} else {
p |= buffer[0];
if (bpp >= 16) {
p |= ((Pixel)buffer[1]) << 8;
if (bpp == 32) {
p |= ((Pixel)buffer[2]) << 16;
p |= ((Pixel)buffer[3]) << 24;
}
}
}
return p;
}
inline void PixelFormat::bufferFromPixel(rdr::U8* buffer, Pixel p) const
{
if (bigEndian) {
switch (bpp) {
case 32:
*(buffer++) = (p >> 24) & 0xff;
*(buffer++) = (p >> 16) & 0xff;
case 16:
*(buffer++) = (p >> 8) & 0xff;
case 8:
*(buffer++) = (p >> 0) & 0xff;
}
} else {
buffer[0] = (p >> 0) & 0xff;
if (bpp >= 16) {
buffer[1] = (p >> 8) & 0xff;
if (bpp == 32) {
buffer[2] = (p >> 16) & 0xff;
buffer[3] = (p >> 24) & 0xff;
}
}
}
}
inline void PixelFormat::rgbFromPixel(Pixel p, ColourMap* cm, rdr::U16 *r, rdr::U16 *g, rdr::U16 *b) const
{
if (trueColour) {
int mb, rb, gb, bb;
/* Bit replication is much cheaper than multiplication and division */
mb = minBits;
rb = redBits;
gb = greenBits;
bb = blueBits;
*r = (p >> redShift) << (16 - rb);
*g = (p >> greenShift) << (16 - gb);
*b = (p >> blueShift) << (16 - bb);
while (mb < 16) {
*r = *r | (*r >> rb);
*g = *g | (*g >> gb);
*b = *b | (*b >> bb);
mb <<= 1;
rb <<= 1;
gb <<= 1;
bb <<= 1;
}
} else if (cm) {
int ir, ig, ib;
cm->lookup(p, &ir, &ig, &ib);
*r = ir;
*g = ig;
*b = ib;
} else {
// XXX just return 0 for colour map?
*r = 0;
*g = 0;
*b = 0;
}
}
inline void PixelFormat::rgbFromPixel(Pixel p, ColourMap* cm, rdr::U8 *r, rdr::U8 *g, rdr::U8 *b) const
{
if (trueColour) {
int mb, rb, gb, bb;
/* Bit replication is much cheaper than multiplication and division */
mb = minBits;
rb = redBits;
gb = greenBits;
bb = blueBits;
*r = (p >> redShift) << (8 - rb);
*g = (p >> greenShift) << (8 - gb);
*b = (p >> blueShift) << (8 - bb);
while (mb < 8) {
*r = *r | (*r >> rb);
*g = *g | (*g >> gb);
*b = *b | (*b >> bb);
mb <<= 1;
rb <<= 1;
gb <<= 1;
bb <<= 1;
}
} else {
rdr::U16 r2, g2, b2;
rgbFromPixel(p, cm, &r2, &g2, &b2);
*r = r2 >> 8;
*g = g2 >> 8;
*b = b2 >> 8;
}
}
}
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