mirror of
https://github.com/kasmtech/KasmVNC.git
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156 lines
4.1 KiB
C++
156 lines
4.1 KiB
C++
/* Copyright 2014 Pierre Ossman for Cendio AB
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#define CONCAT2(a,b) a##b
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#define CONCAT2E(a,b) CONCAT2(a,b)
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#define UIN CONCAT2E(U,INBPP)
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#define UOUT CONCAT2E(U,OUTBPP)
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#define SWAP16(n) ((((n) & 0xff) << 8) | (((n) >> 8) & 0xff))
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#define SWAP32(n) (((n) >> 24) | (((n) & 0x00ff0000) >> 8) | \
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(((n) & 0x0000ff00) << 8) | ((n) << 24))
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#define SWAPIN CONCAT2E(SWAP,INBPP)
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#define SWAPOUT CONCAT2E(SWAP,OUTBPP)
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#if INBPP == 32
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void PixelFormat::directBufferFromBufferFrom888(rdr::UOUT* dst,
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const PixelFormat &srcPF,
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const rdr::U8* src,
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int w, int h,
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int dstStride,
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int srcStride) const
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{
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const rdr::U8 *r, *g, *b;
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int dstPad, srcPad;
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const rdr::U8 *redDownTable, *greenDownTable, *blueDownTable;
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redDownTable = &downconvTable[(redBits-1)*256];
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greenDownTable = &downconvTable[(greenBits-1)*256];
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blueDownTable = &downconvTable[(blueBits-1)*256];
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if (srcPF.bigEndian) {
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r = src + (24 - srcPF.redShift)/8;
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g = src + (24 - srcPF.greenShift)/8;
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b = src + (24 - srcPF.blueShift)/8;
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} else {
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r = src + srcPF.redShift/8;
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g = src + srcPF.greenShift/8;
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b = src + srcPF.blueShift/8;
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}
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dstPad = (dstStride - w);
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srcPad = (srcStride - w) * 4;
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while (h--) {
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int w_ = w;
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while (w_--) {
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rdr::UOUT d;
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d = redDownTable[*r] << redShift;
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d |= greenDownTable[*g] << greenShift;
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d |= blueDownTable[*b] << blueShift;
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#if OUTBPP != 8
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if (endianMismatch)
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d = SWAPOUT(d);
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#endif
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*dst = d;
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dst++;
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r += 4;
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g += 4;
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b += 4;
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}
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dst += dstPad;
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r += srcPad;
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g += srcPad;
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b += srcPad;
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}
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}
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#endif /* INBPP == 32 */
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#if OUTBPP == 32
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void PixelFormat::directBufferFromBufferTo888(rdr::U8* dst,
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const PixelFormat &srcPF,
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const rdr::UIN* src,
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int w, int h,
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int dstStride,
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int srcStride) const
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{
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rdr::U8 *r, *g, *b, *x;
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int dstPad, srcPad;
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const rdr::U8 *redUpTable, *greenUpTable, *blueUpTable;
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redUpTable = &upconvTable[(srcPF.redBits-1)*256];
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greenUpTable = &upconvTable[(srcPF.greenBits-1)*256];
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blueUpTable = &upconvTable[(srcPF.blueBits-1)*256];
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if (bigEndian) {
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r = dst + (24 - redShift)/8;
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g = dst + (24 - greenShift)/8;
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b = dst + (24 - blueShift)/8;
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x = dst + (24 - (48 - redShift - greenShift - blueShift))/8;
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} else {
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r = dst + redShift/8;
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g = dst + greenShift/8;
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b = dst + blueShift/8;
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x = dst + (48 - redShift - greenShift - blueShift)/8;
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}
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dstPad = (dstStride - w) * 4;
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srcPad = (srcStride - w);
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while (h--) {
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int w_ = w;
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while (w_--) {
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rdr::UIN s;
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s = *src;
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#if INBPP != 8
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if (srcPF.endianMismatch)
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s = SWAPIN(s);
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#endif
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*r = redUpTable[(s >> srcPF.redShift) & 0xff];
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*g = greenUpTable[(s >> srcPF.greenShift) & 0xff];
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*b = blueUpTable[(s >> srcPF.blueShift) & 0xff];
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*x = 0;
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r += 4;
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g += 4;
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b += 4;
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x += 4;
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src++;
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}
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r += dstPad;
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g += dstPad;
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b += dstPad;
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x += dstPad;
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src += srcPad;
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}
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}
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#endif /* OUTBPP == 32 */
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