diff options
Diffstat (limited to 'engines/titanic/star_control/surface_fader.cpp')
| -rw-r--r-- | engines/titanic/star_control/surface_fader.cpp | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/engines/titanic/star_control/surface_fader.cpp b/engines/titanic/star_control/surface_fader.cpp new file mode 100644 index 0000000000..089ad51717 --- /dev/null +++ b/engines/titanic/star_control/surface_fader.cpp @@ -0,0 +1,73 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program 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 program 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 program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#include "titanic/star_control/surface_fader.h" +#include "common/system.h" +#include "graphics/pixelformat.h" + +namespace Titanic { + +CSurfaceFader::CSurfaceFader() : CSurfaceFaderBase() { + _dataP = new byte[_count]; + + for (int idx = 0; idx < _count; ++idx) { + // TODO: Setup data bytes + } +} + +CSurfaceFader::~CSurfaceFader() { + delete[] _dataP; +} + +void CSurfaceFader::copySurface(CSurfaceArea &srcSurface, CSurfaceArea &destSurface) { + const uint16 *srcPixelP = srcSurface._pixelsPtr; + uint16 *destPixelP = destSurface._pixelsPtr; + + // Currently we only support 2 bytes per pixel surfaces + assert(srcSurface._bpp == 2); + + byte dataVal = _dataP[_index]; + double fraction = (double)dataVal / ((double)(_count - 1)); + if (!_fadeIn) + // For fade outs, reverse the percentage visibility + fraction = 1.0 - fraction; + + // Iterate through the pixels + byte r, g, b; + Graphics::PixelFormat format = g_system->getScreenFormat(); + + for (int yp = 0; yp < srcSurface._height; ++yp) { + for (int xp = 0; xp < srcSurface._width; ++xp, ++srcPixelP, ++destPixelP) { + format.colorToRGB(*srcPixelP, r, g, b); + r = (byte)((double)r * fraction); + g = (byte)((double)g * fraction); + b = (byte)((double)b * fraction); + *destPixelP = format.RGBToColor(r, g, b); + } + } +} + +void CSurfaceFader::setFadeIn(bool fadeIn) { + _fadeIn = fadeIn; +} + +} // End of namespace Titanic |