Initial commit

engines/stark/gfx/openglfade.cpp

@@ -0,0 +1,81 @@
+/* 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/openglfade.h"
+
+#include "engines/stark/gfx/opengl.h"
+
+#if defined(USE_OPENGL_GAME)
+
+namespace Stark {
+namespace Gfx {
+
+static const GLfloat fadeVertices[] = {
+	// X   Y
+	-1.0f,  1.0f,
+	 1.0f,  1.0f,
+	-1.0f, -1.0f,
+	 1.0f, -1.0f,
+};
+
+OpenGLFadeRenderer::OpenGLFadeRenderer(OpenGLDriver *gfx) :
+	FadeRenderer(),
+	_gfx(gfx) {
+}
+
+OpenGLFadeRenderer::~OpenGLFadeRenderer() {
+}
+
+void OpenGLFadeRenderer::render(float fadeLevel) {
+	_gfx->start2DMode();
+
+	glMatrixMode(GL_PROJECTION);
+	glPushMatrix();
+	glLoadIdentity();
+
+	glMatrixMode(GL_MODELVIEW);
+	glPushMatrix();
+	glLoadIdentity();
+
+	glDisable(GL_TEXTURE_2D);
+
+	glEnableClientState(GL_VERTEX_ARRAY);
+
+	glColor4f(0.0f, 0.0f, 0.0f, 1.0f - fadeLevel);
+	glVertexPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &fadeVertices[0]);
+
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+	glDisableClientState(GL_VERTEX_ARRAY);
+
+	glMatrixMode(GL_MODELVIEW);
+	glPopMatrix();
+
+	glMatrixMode(GL_PROJECTION);
+	glPopMatrix();
+
+	_gfx->end2DMode();
+}
+
+} // End of namespace Gfx
+} // End of namespace Stark
+
+#endif // defined(USE_OPENGL_GAME)