58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "engines/stark/gfx/openglsfade.h"
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#include "engines/stark/gfx/opengls.h"
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#if defined(USE_OPENGL_SHADERS)
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#include "graphics/opengl/shader.h"
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namespace Stark {
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namespace Gfx {
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OpenGLSFadeRenderer::OpenGLSFadeRenderer(OpenGLSDriver *gfx) :
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FadeRenderer(),
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_gfx(gfx) {
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_shader = _gfx->createFadeShaderInstance();
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}
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OpenGLSFadeRenderer::~OpenGLSFadeRenderer() {
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delete _shader;
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}
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void OpenGLSFadeRenderer::render(float fadeLevel) {
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_gfx->start2DMode();
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_shader->use();
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_shader->setUniform1f("alphaLevel", 1.0 - fadeLevel);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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_shader->unbind();
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_gfx->end2DMode();
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}
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} // End of namespace Gfx
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} // End of namespace Stark
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#endif // defined(USE_OPENGL_SHADERS)
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