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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/openglssurface.h"
#include "engines/stark/gfx/opengls.h"
#include "engines/stark/gfx/bitmap.h"
#include "engines/stark/gfx/color.h"
#if defined(USE_OPENGL_SHADERS)
#include "graphics/opengl/shader.h"
namespace Stark {
namespace Gfx {
OpenGLSSurfaceRenderer::OpenGLSSurfaceRenderer(OpenGLSDriver *gfx) :
SurfaceRenderer(),
_gfx(gfx) {
_shader = _gfx->createSurfaceShaderInstance();
_shaderFill = _gfx->createSurfaceFillShaderInstance();
}
OpenGLSSurfaceRenderer::~OpenGLSSurfaceRenderer() {
delete _shaderFill;
delete _shader;
}
void OpenGLSSurfaceRenderer::render(const Bitmap *bitmap, const Common::Point &dest) {
render(bitmap, dest, bitmap->width(), bitmap->height());
}
void OpenGLSSurfaceRenderer::render(const Bitmap *bitmap, const Common::Point &dest, uint width, uint height) {
// Destination rectangle with given width and height
_gfx->start2DMode();
_shader->use();
_shader->setUniform1f("fadeLevel", _fadeLevel);
_shader->setUniform1f("snapToGrid", _snapToGrid);
_shader->setUniform("verOffsetXY", normalizeOriginalCoordinates(dest.x, dest.y));
if (_noScalingOverride) {
_shader->setUniform("verSizeWH", normalizeCurrentCoordinates(width, height));
} else {
_shader->setUniform("verSizeWH", normalizeOriginalCoordinates(width, height));
}
Common::Rect nativeViewport = _gfx->getViewport();
_shader->setUniform("viewport", Math::Vector2d(nativeViewport.width(), nativeViewport.height()));
bitmap->bind();
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
_shader->unbind();
_gfx->end2DMode();
}
void OpenGLSSurfaceRenderer::fill(const Color &color, const Common::Point &dest, uint width, uint height) {
// Destination rectangle with given width and height
_gfx->start2DMode();
_shaderFill->use();
_shaderFill->setUniform1f("fadeLevel", _fadeLevel);
_shaderFill->setUniform1f("snapToGrid", _snapToGrid);
_shaderFill->setUniform("verOffsetXY", normalizeOriginalCoordinates(dest.x, dest.y));
if (_noScalingOverride) {
_shaderFill->setUniform("verSizeWH", normalizeCurrentCoordinates(width, height));
} else {
_shaderFill->setUniform("verSizeWH", normalizeOriginalCoordinates(width, height));
}
Common::Rect nativeViewport = _gfx->getViewport();
_shaderFill->setUniform("viewport", Math::Vector2d(nativeViewport.width(), nativeViewport.height()));
_shaderFill->setUniform("color", Math::Vector4d(color.r / 255.0f, color.g / 255.0f, color.b / 255.0f, color.a / 255.0f));
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
_shaderFill->unbind();
_gfx->end2DMode();
}
Math::Vector2d OpenGLSSurfaceRenderer::normalizeOriginalCoordinates(int x, int y) const {
Common::Rect viewport = _gfx->getUnscaledViewport();
return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
}
Math::Vector2d OpenGLSSurfaceRenderer::normalizeCurrentCoordinates(int x, int 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
#endif // if defined(USE_OPENGL_SHADERS)
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