60 lines
1.7 KiB
C++
60 lines
1.7 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 "titanic/support/transparency_surface.h"
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#include "common/algorithm.h"
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#include "common/textconsole.h"
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namespace Titanic {
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CTransparencySurface::CTransparencySurface(const Graphics::Surface *surface,
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TransparencyMode transMode) : _surface(surface) {
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_pitch = 0;
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_runLength = 0;
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_flag = false;
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_opaqueColor = 0;
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_transparentColor = 0xff;
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switch (transMode) {
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case TRANS_MASK0:
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case TRANS_ALPHA0:
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_transparentColor = 0;
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_opaqueColor = 0xff;
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break;
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case TRANS_MASK255:
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case TRANS_ALPHA255:
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_transparentColor = 0xff;
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_opaqueColor = 0;
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break;
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case TRANS_DEFAULT:
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// If top left pixel is low, then 0 is the transparent color
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if (*(const byte *)surface->getPixels() < 0x80) {
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_opaqueColor = 0xff;
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_transparentColor = 0;
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}
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break;
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default:
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break;
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}
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}
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} // End of namespace Titanic
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