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/* Copyright (C) 2000-2003 Constantin Kaplinsky. All Rights Reserved.
* Copyright (C) 2011 D. R. Commander. All Rights Reserved.
* Copyright 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.
*/
#define CONCAT2(a,b) a##b
#define CONCAT2E(a,b) CONCAT2(a,b)
#define UBPP CONCAT2E(U,BPP)
inline bool EncodeManager::checkSolidTile(const Rect& r,
rdr::UBPP colourValue,
const PixelBuffer *pb)
{
int w, h;
const rdr::UBPP* buffer;
int stride, pad;
w = r.width();
h = r.height();
buffer = (const rdr::UBPP*)pb->getBuffer(r, &stride);
pad = stride - w;
while (h--) {
int w_ = w;
while (w_--) {
if (*buffer != colourValue)
return false;
buffer++;
}
buffer += pad;
}
return true;
}
inline bool EncodeManager::analyseRect(int width, int height,
const rdr::UBPP* buffer, int stride,
struct RectInfo *info, int maxColours)
{
int pad;
rdr::UBPP colour;
int count;
info->rleRuns = 0;
info->palette.clear();
pad = stride - width;
// For efficiency, we only update the palette on changes in colour
colour = buffer[0];
count = 0;
while (height--) {
int w_ = width;
while (w_--) {
if (*buffer != colour) {
if (!info->palette.insert(colour, count))
return false;
if (info->palette.size() > maxColours)
return false;
// FIXME: This doesn't account for switching lines
info->rleRuns++;
colour = *buffer;
count = 0;
}
buffer++;
count++;
}
buffer += pad;
}
// Make sure the final pixels also get counted
if (!info->palette.insert(colour, count))
return false;
if (info->palette.size() > maxColours)
return false;
return true;
}
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