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engines/stark/gfx/openglssurface.cpp

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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->setUniform("snapToGrid", _snapToGrid ? 1 : 0);
+	_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->setUniform("snapToGrid", _snapToGrid ? 1 : 0);
+	_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)