mirror of
https://github.com/kasmtech/KasmVNC.git
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99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
/* Copyright (C) 2000-2003 Constantin Kaplinsky. All Rights Reserved.
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* Copyright (C) 2011 D. R. Commander. All Rights Reserved.
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* 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 UBPP CONCAT2E(U,BPP)
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inline bool EncodeManager::checkSolidTile(const Rect& r,
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rdr::UBPP colourValue,
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const PixelBuffer *pb)
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{
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int w, h;
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const rdr::UBPP* buffer;
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int stride, pad;
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w = r.width();
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h = r.height();
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buffer = (const rdr::UBPP*)pb->getBuffer(r, &stride);
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pad = stride - w;
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while (h--) {
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int w_ = w;
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while (w_--) {
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if (*buffer != colourValue)
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return false;
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buffer++;
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}
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buffer += pad;
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}
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return true;
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}
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inline bool EncodeManager::analyseRect(int width, int height,
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const rdr::UBPP* buffer, int stride,
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struct RectInfo *info, int maxColours) const
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{
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int pad;
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rdr::UBPP colour;
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int count;
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info->rleRuns = 0;
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info->palette->clear();
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pad = stride - width;
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// For efficiency, we only update the palette on changes in colour
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colour = buffer[0];
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count = 0;
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while (height--) {
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int w_ = width;
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while (w_--) {
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if (*buffer != colour) {
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if (!info->palette->insert(colour, count))
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return false;
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if (info->palette->size() > maxColours)
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return false;
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// FIXME: This doesn't account for switching lines
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info->rleRuns++;
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colour = *buffer;
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count = 0;
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}
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buffer++;
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count++;
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}
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buffer += pad;
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}
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// Make sure the final pixels also get counted
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if (!info->palette->insert(colour, count))
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return false;
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if (info->palette->size() > maxColours)
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return false;
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return true;
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}
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