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/* ResidualVM - A 3D game interpreter
*
* ResidualVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the AUTHORS
* 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 "engines/stark/gfx/openglsfade.h"
#include "engines/stark/gfx/opengls.h"
#include "graphics/opengl/shader.h"
namespace Stark {
namespace Gfx {
OpenGLSFadeRenderer::OpenGLSFadeRenderer(OpenGLSDriver *gfx) :
FadeRenderer(),
_gfx(gfx) {
_shader = _gfx->createFadeShaderInstance();
}
OpenGLSFadeRenderer::~OpenGLSFadeRenderer() {
delete _shader;
}
void OpenGLSFadeRenderer::render(float fadeLevel) {
_gfx->start2DMode();
_shader->use();
_shader->setUniform1f("alphaLevel", 1.0 - fadeLevel);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
_shader->unbind();
_gfx->end2DMode();
}
} // End of namespace Gfx
} // End of namespace Stark
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