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backends/graphics/opengl/renderer3d.h

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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/>.
+ *
+ */
+
+#ifndef BACKENDS_GRAPHICS_OPENGL_RENDERER3D_H
+#define BACKENDS_GRAPHICS_OPENGL_RENDERER3D_H
+
+#include "common/scummsys.h"
+
+#if defined(USE_OPENGL_GAME) || defined(USE_OPENGL_SHADERS)
+
+#include "graphics/opengl/texture.h"
+
+namespace OpenGL {
+
+class Renderer3D {
+public:
+	Renderer3D();
+	~Renderer3D() { destroy(); }
+
+	void initSize(uint w, uint h, int samples, bool renderToFrameBuffer);
+	void resize(uint w, uint h);
+	void recreate();
+	void destroy();
+
+	void leave3D();
+	void enter3D();
+	void presentBuffer();
+
+	void showOverlay(uint w, uint h);
+	void hideOverlay();
+
+	const Texture &getGLTexture() const { return _texture; }
+	bool hasTexture() const { return _texture.getGLTexture() != 0; }
+
+	void setRotation(Common::RotationMode rotation) { _texture.setRotation(rotation); }
+
+protected:
+	void setup();
+
+	int _stackLevel;
+	bool _inOverlay;
+	int _pendingScreenChangeWidth;
+	int _pendingScreenChangeHeight;
+
+	bool _renderToFrameBuffer;
+	int _samples;
+	Texture _texture;
+	GLuint _renderBuffers[3];
+	GLuint _frameBuffers[2];
+
+#define CTX_STATE(gl_param) GLboolean _save ## gl_param = false
+#define CTX_BOOLEAN(gl_param) GLboolean _save ## gl_param = false
+#define CTX_INTEGER(gl_param, count) GLint _save ## gl_param[count] = { 0 }
+
+	CTX_STATE(GL_BLEND);
+	CTX_STATE(GL_CULL_FACE);
+	CTX_STATE(GL_DEPTH_TEST);
+	CTX_STATE(GL_DITHER);
+	CTX_STATE(GL_POLYGON_OFFSET_FILL);
+	CTX_STATE(GL_SCISSOR_TEST);
+	CTX_STATE(GL_STENCIL_TEST);
+
+	CTX_BOOLEAN(GL_DEPTH_WRITEMASK);
+
+	CTX_INTEGER(GL_BLEND_SRC_RGB, 1);
+	CTX_INTEGER(GL_BLEND_DST_RGB, 1);
+	CTX_INTEGER(GL_BLEND_SRC_ALPHA, 1);
+	CTX_INTEGER(GL_BLEND_DST_ALPHA, 1);
+	CTX_INTEGER(GL_SCISSOR_BOX, 4);
+	CTX_INTEGER(GL_VIEWPORT, 4);
+
+#undef CTX_INTEGER
+#undef CTX_BOOLEAN
+#undef CTX_STATE
+};
+
+} // End of namespace OpenGL
+
+#endif // defined(USE_OPENGL_GAME) || defined(USE_OPENGL_SHADERS)
+
+#endif