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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/openglssurface.h"
#include "engines/stark/gfx/opengls.h"
#include "engines/stark/gfx/texture.h"
#include "graphics/opengl/shader.h"
namespace Stark {
namespace Gfx {
OpenGLSSurfaceRenderer::OpenGLSSurfaceRenderer(OpenGLSDriver *gfx) :
SurfaceRenderer(),
_gfx(gfx) {
_shader = _gfx->createSurfaceShaderInstance();
}
OpenGLSSurfaceRenderer::~OpenGLSSurfaceRenderer() {
delete _shader;
}
void OpenGLSSurfaceRenderer::render(const Texture *texture, const Common::Point &dest) {
// Destination rectangle
const float sLeft = dest.x;
const float sTop = dest.y;
const float sWidth = texture->width();
const float sHeight = texture->height();
_gfx->start2DMode();
_shader->use();
_shader->setUniform1f("fadeLevel", _fadeLevel);
_shader->setUniform("verOffsetXY", normalizeOriginalCoordinates(sLeft, sTop));
if (_noScalingOverride) {
_shader->setUniform("verSizeWH", normalizeCurrentCoordinates(sWidth, sHeight));
} else {
_shader->setUniform("verSizeWH", normalizeOriginalCoordinates(sWidth, sHeight));
}
texture->bind();
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
_shader->unbind();
_gfx->end2DMode();
}
Math::Vector2d OpenGLSSurfaceRenderer::normalizeOriginalCoordinates(float x, float y) const {
Common::Rect viewport = _gfx->getUnscaledViewport();
return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
}
Math::Vector2d OpenGLSSurfaceRenderer::normalizeCurrentCoordinates(float x, float y) const {
Common::Rect viewport = _gfx->getViewport();
return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
}
} // End of namespace Gfx
} // End of namespace Stark
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