| /* 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; |
| } |