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/* 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_area.h"
namespace Titanic {
CSurfaceArea::CSurfaceArea(CVideoSurface *surface) {
_width = surface->getWidth();
_height = surface->getHeight();
_pitch = surface->getPitch();
// Original supported other pixel depths
_bpp = surface->getPixelDepth();
assert(_bpp == 2);
_pixelsPtr = surface->getPixels();
initialize();
}
void CSurfaceArea::initialize() {
_bounds = Rect(0, 0, _width - 1, _height - 1);
_centroid = FPoint(_width / 2.0, _height / 2.0);
_pixel = 0xffffff;
_field27 = _field26 = _field25 = 0;
_field24 = 0;
_rgb = _field2C = 0;
_mode = SA_NONE;
}
void CSurfaceArea::setColor(uint rgb) {
switch (_mode) {
case SA_MODE1:
_color = 0;
_colorMask = rgb;
break;
case SA_MODE2:
_color = rgb;
_colorMask = ~rgb;
break;
case SA_MODE3:
_color = rgb;
_colorMask = 0xFFFFFFFF;
break;
case SA_MODE4:
_color = 0;
_colorMask = ~rgb;
break;
default:
break;
}
}
SurfaceAreaMode CSurfaceArea::setMode(SurfaceAreaMode mode) {
SurfaceAreaMode oldMode = _mode;
_mode = mode;
setColor(_color);
return oldMode;
}
void CSurfaceArea::setColorFromPixel() {
pixelToRGB(_pixel, &_rgb);
setColor(_rgb);
}
void CSurfaceArea::pixelToRGB(uint pixel, uint *rgb) {
switch (_bpp) {
case 0:
*rgb = 0;
break;
case 1:
case 2: {
uint r = pixel & 0xF8;
uint g = (pixel >> 8) & 0xf8;
uint b = ((pixel >> 16) & 0xff) >> 3;
uint value = (((r << 5) | g) << 2) | b;
value &= 0xffff;
*rgb = (value << 16) | value;
break;
}
case 3:
case 4:
*rgb = pixel;
break;
}
}
} // End of namespace Titanic
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