71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program 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 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "bagel/mfc/gfx/palette_map.h"
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namespace Bagel {
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namespace MFC {
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namespace Gfx {
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PaletteMap::PaletteMap(const Graphics::Palette &src,
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const Graphics::Palette &dest) : _srcPalCount(src.size()) {
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assert(src.size() == 256 && dest.size() == 256);
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// Set up lookup map
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Graphics::PaletteLookup lookup(dest.data(), dest.size());
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_map = lookup.createMap(src.data(), src.size());
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// Hack: Index 255 must always remain mapped to 255,
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// in order for transparency to work. In cases where the
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// palette has multiple White entries, PaletteLookup could
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// end up using the first match, not the last (255) one
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if (!_map) {
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_map = new uint32[256];
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for (int i = 0; i < 256; ++i)
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_map[i] = i;
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}
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byte r, g, b;
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for (int i = 0; i < 256; ++i) {
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src.get(i, r, g, b);
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if (r == 0xff && g == 0xff && b == 0xff)
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_map[i] = 0xff;
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}
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}
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PaletteMap::~PaletteMap() {
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delete[] _map;
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}
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void PaletteMap::map(const byte *src, byte *dest, size_t len) {
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if (_map) {
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for (; len > 0; --len, ++src, ++dest)
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*dest = _map[*src];
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} else {
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// Identical palettes, so pixels can just be copied
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Common::copy(src, src + len, dest);
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}
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}
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} // namespace Gfx
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} // namespace MFC
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} // namespace Bagel
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