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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "engines/stark/gfx/openglfade.h"
#include "engines/stark/gfx/opengl.h"
#if defined(USE_OPENGL_GAME)
namespace Stark {
namespace Gfx {
static const GLfloat fadeVertices[] = {
// X Y
-1.0f, 1.0f,
1.0f, 1.0f,
-1.0f, -1.0f,
1.0f, -1.0f,
};
OpenGLFadeRenderer::OpenGLFadeRenderer(OpenGLDriver *gfx) :
FadeRenderer(),
_gfx(gfx) {
}
OpenGLFadeRenderer::~OpenGLFadeRenderer() {
}
void OpenGLFadeRenderer::render(float fadeLevel) {
_gfx->start2DMode();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glDisable(GL_TEXTURE_2D);
glEnableClientState(GL_VERTEX_ARRAY);
glColor4f(0.0f, 0.0f, 0.0f, 1.0f - fadeLevel);
glVertexPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &fadeVertices[0]);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableClientState(GL_VERTEX_ARRAY);
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
_gfx->end2DMode();
}
} // End of namespace Gfx
} // End of namespace Stark
#endif // defined(USE_OPENGL_GAME)
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