fader.cpp

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/* xoreos - A reimplementation of BioWare's Aurora engine
 *
 * xoreos is the legal property of its developers, whose names
 * can be found in the AUTHORS file distributed with this source
 * distribution.
 *
 * xoreos 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 3
 * of the License, or (at your option) any later version.
 *
 * xoreos 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 xoreos. If not, see <http://www.gnu.org/licenses/>.
 */

#include "src/common/util.h"

#include "src/graphics/images/surface.h"

#include "src/video/fader.h"

#include "src/events/events.h"

namespace Video {

Fader::Fader(uint32 width, uint32 height, int n) {
    addTrack(new FaderVideoTrack(width, height, n));
    initVideo();
}

void Fader::decodeNextTrackFrame(VideoTrack &track) {
    assert(_surface);
    static_cast<FaderVideoTrack &>(track).drawFrame(*_surface);
    _needCopy = true;
}

Fader::FaderVideoTrack::FaderVideoTrack(uint32 width, uint32 height, int n) : _width(width), _height(height), _curFrame(-1), _c(0), _n(n) {
}

void Fader::FaderVideoTrack::drawFrame(Graphics::Surface &surface) {
    // Fade from black to green
    byte *data = surface.getData();
    for (uint32 i = 0; i < _height; i++) {
        byte *rowData = data;

        for (uint32 j = 0; j < _width; j++, rowData += 4) {
            rowData[0] = 0;
            rowData[1] = _c;
            rowData[2] = 0;
            rowData[3] = 255;
        }

        data += surface.getWidth() * 4;
    }

    // Keep a red square in the middle
    int xPos = (_width  / 2) - 2;
    int yPos = (_height / 2) - 2;
    int dPos = (yPos * surface.getWidth() + xPos) * 4;
    for (int i = 0; i < 4; i++) {
        for (int j = 0; j < 4; j++) {
            surface.getData()[dPos + j * 4 + 0] =   0;
            surface.getData()[dPos + j * 4 + 1] =   0;
            surface.getData()[dPos + j * 4 + 2] = 255;
            surface.getData()[dPos + j * 4 + 3] = 255;
        }
        dPos += surface.getWidth() * 4;
    }

    _c += 2;
    _curFrame++;
}

} // End of namespace Video