1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798 |
- /* 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;
- }
|