opengl.h

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00001 /*
00002 **  ClanLib SDK
00003 **  Copyright (c) 1997-2011 The ClanLib Team
00004 **
00005 **  This software is provided 'as-is', without any express or implied
00006 **  warranty.  In no event will the authors be held liable for any damages
00007 **  arising from the use of this software.
00008 **
00009 **  Permission is granted to anyone to use this software for any purpose,
00010 **  including commercial applications, and to alter it and redistribute it
00011 **  freely, subject to the following restrictions:
00012 **
00013 **  1. The origin of this software must not be misrepresented; you must not
00014 **     claim that you wrote the original software. If you use this software
00015 **     in a product, an acknowledgment in the product documentation would be
00016 **     appreciated but is not required.
00017 **  2. Altered source versions must be plainly marked as such, and must not be
00018 **     misrepresented as being the original software.
00019 **  3. This notice may not be removed or altered from any source distribution.
00020 **
00021 **  Note: Some of the libraries ClanLib may link to may have additional
00022 **  requirements or restrictions.
00023 **
00024 **  File Author(s):
00025 **
00026 **    Magnus Norddahl
00027 */
00028 
00031 
00032 #pragma once
00033 
00034 #include "api_gl.h"
00035 #include "opengl_defines.h"
00036 #include <utility>
00037 #include "../Core/Text/string_types.h"
00038 #include "../Display/Image/pixel_format.h"
00039 #include "../Display/Render/texture.h"
00040 
00041 class CL_GLFunctions;
00042 class CL_GraphicContext;
00043 class CL_OpenGLGraphicContextProvider;
00044 
00045 enum CL_TextureFormat;
00046 
00048 typedef void (CL_ProcAddress)();
00049 
00053 class CL_API_GL CL_OpenGL
00054 {
00057 
00058 public:
00060         static CL_ProcAddress *get_proc_address(const CL_String8 &function_name);
00061 
00063         static CL_GLFunctions *functions;
00064 
00066         static int get_textureformat_bits(CL_TextureFormat format);
00067 
00069 
00071         static bool to_opengl_pixelformat(CL_TextureFormat texture_format, GLenum &format, GLenum &type);
00072 
00078         static void to_opengl_textureformat(CL_TextureFormat format, GLint &gl_internal_format, GLenum &gl_pixel_format);
00079 
00081         static void set_active(CL_GraphicContext &gc);
00082 
00084         static void set_active(const CL_OpenGLGraphicContextProvider * const gc_provider);
00085 
00091         static bool set_active();
00092 
00096         static void check_error();
00097 
00099         static int get_opengl_version_major() {return opengl_version_major;}
00100 
00102         static int get_opengl_version_minor() {return opengl_version_minor;}
00103 
00105         static int get_glsl_version_major() {return glsl_version_major;}
00106 
00108         static int get_glsl_version_minor() {return glsl_version_minor;}
00109 
00111 
00112 private:
00116         static void remove_active(const CL_OpenGLGraphicContextProvider * const gc_provider);
00117 
00118         static int opengl_version_major;
00119         static int opengl_version_minor;
00120         static int glsl_version_major;
00121         static int glsl_version_minor;
00122 
00123         friend class CL_OpenGLGraphicContextProvider;
00124 
00125 };
00126