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myst3/gfx_opengl_shaders.h

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00001 /* ResidualVM - A 3D game interpreter
00002  *
00003  * ResidualVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the AUTHORS
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 #ifndef GFX_OPENGL_SHADERS_H_
00024 #define GFX_OPENGL_SHADERS_H_
00025 
00026 #include "common/rect.h"
00027 #include "math/rect2d.h"
00028 
00029 #include "graphics/opengl/shader.h"
00030 
00031 #include "engines/myst3/gfx.h"
00032 
00033 namespace Myst3 {
00034 
00035 class ShaderRenderer : public Renderer {
00036 public:
00037     ShaderRenderer(OSystem *_system);
00038     virtual ~ShaderRenderer();
00039 
00040     virtual void init() override;
00041 
00042     virtual void clear() override;
00043     virtual void selectTargetWindow(Window *window, bool is3D, bool scaled) override;
00044 
00045     virtual Texture *createTexture(const Graphics::Surface *surface) override;
00046     virtual void freeTexture(Texture *texture) override;
00047 
00048     virtual void drawRect2D(const Common::Rect &rect, uint32 color) override;
00049     virtual void drawTexturedRect2D(const Common::Rect &screenRect, const Common::Rect &textureRect, Texture *texture,
00050                                     float transparency = -1.0, bool additiveBlending = false) override;
00051     virtual void drawTexturedRect3D(const Math::Vector3d &topLeft, const Math::Vector3d &bottomLeft,
00052                                     const Math::Vector3d &topRight, const Math::Vector3d &bottomRight,
00053                                     Texture *texture) override;
00054 
00055     virtual void drawCube(Texture **textures) override;
00056     virtual void draw2DText(const Common::String &text, const Common::Point &position) override;
00057 
00058     virtual Graphics::Surface *getScreenshot() override;
00059 
00060 private:
00061     void setupQuadEBO();
00062     Math::Vector2d scaled(float x, float y) const;
00063 
00064     OpenGL::Shader *_boxShader;
00065     OpenGL::Shader *_cubeShader;
00066     OpenGL::Shader *_rect3dShader;
00067     OpenGL::Shader *_textShader;
00068 
00069     GLuint _boxVBO;
00070     GLuint _cubeVBO;
00071     GLuint _rect3dVBO;
00072     GLuint _textVBO;
00073     GLuint _quadEBO;
00074 
00075     Common::Rect _currentViewport;
00076 
00077     Common::String _prevText;
00078     Common::Point _prevTextPosition;
00079 };
00080 
00081 } // End of namespace Myst3
00082 
00083 #endif


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