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102 lines
3.9 KiB
102 lines
3.9 KiB
//============ Copyright (c) Valve Corporation, All rights reserved. ============
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//
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// glmgrext.h
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// helper file for extension testing and runtime importing of entry points
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//
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//===============================================================================
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#pragma once
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#include <OpenGL/gl.h>
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#include <OpenGL/glext.h>
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// #define symbol INSTANTIATE_GL_IMPORTS controls whether the following macro "GL_IMPORT" writes externs or writes decls
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// normally only glmgr.cpp sets that symbol and includes this file
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// to simplify usage, a function ptr type must exist for every entry point, following the name##FuncPtr convention.
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#ifdef INSTANTIATE_GL_IMPORTS
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#define GL_IMPORT( name ) name##FuncPtr name = 0
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#else
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#define GL_IMPORT( name ) extern name##FuncPtr name;
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#endif
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// before declaring each import, check to see if the EXT symbol is in effect,
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// and if so, don't do it!
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#ifndef GL_EXT_draw_buffers2
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typedef void (* glColorMaskIndexedEXTFuncPtr) (GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
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typedef void (* glEnableIndexedEXTFuncPtr) (GLenum target, GLuint index);
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typedef void (* glDisableIndexedEXTFuncPtr) (GLenum target, GLuint index);
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GL_IMPORT(glColorMaskIndexedEXT);
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GL_IMPORT(glEnableIndexedEXT);
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GL_IMPORT(glDisableIndexedEXT);
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#endif
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#ifndef GL_EXT_framebuffer_sRGB
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#define GL_FRAMEBUFFER_SRGB_EXT 0x8DB9
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#define GL_FRAMEBUFFER_SRGB_CAPABLE_EXT 0x8DBA
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#endif
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#ifndef ARB_texture_rg
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#define GL_COMPRESSED_RED 0x8225
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#define GL_COMPRESSED_RG 0x8226
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#define GL_RG 0x8227
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#define GL_RG_INTEGER 0x8228
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#define GL_R8 0x8229
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#define GL_R16 0x822A
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#define GL_RG8 0x822B
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#define GL_RG16 0x822C
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#define GL_R16F 0x822D
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#define GL_R32F 0x822E
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#define GL_RG16F 0x822F
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#define GL_RG32F 0x8230
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#define GL_R8I 0x8231
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#define GL_R8UI 0x8232
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#define GL_R16I 0x8233
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#define GL_R16UI 0x8234
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#define GL_R32I 0x8235
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#define GL_R32UI 0x8236
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#define GL_RG8I 0x8237
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#define GL_RG8UI 0x8238
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#define GL_RG16I 0x8239
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#define GL_RG16UI 0x823A
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#define GL_RG32I 0x823B
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#define GL_RG32UI 0x823C
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#define GL_RGB10_A2UI_ARB 0x906F
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#endif
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#ifndef GL_EXT_bindable_uniform
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#define GL_UNIFORM_BUFFER_EXT 0x8DEE
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#endif
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// unpublished extension enums (thus the "X")
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// from EXT_framebuffer_multisample_blit_scaled..
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#define XGL_SCALED_RESOLVE_FASTEST_EXT 0x90BA
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#define XGL_SCALED_RESOLVE_NICEST_EXT 0x90BB
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void * NSGLGetProcAddress (const char *name);
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// call this to find all the entry points.
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void GLMSetupExtensions( void );
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typedef void (*PFNglColorMaskIndexedEXT)(GLuint index, GLboolean r, GLboolean g, GLboolean b, GLboolean a);
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typedef void (*PFNglEnableIndexedEXT)(GLenum target, GLuint index);
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typedef void (*PFNglDisableIndexedEXT)(GLenum target, GLuint index);
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typedef void (*PFNglUniformBufferEXT)(GLuint program, GLint location, GLuint buffer);
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extern PFNglColorMaskIndexedEXT pfnglColorMaskIndexedEXT;
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extern PFNglEnableIndexedEXT pfnglEnableIndexedEXT;
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extern PFNglDisableIndexedEXT pfnglDisableIndexedEXT;
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extern PFNglUniformBufferEXT pfnglUniformBufferEXT;
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typedef void (*PFNglGetFramebufferAttachmentParameteriv)(GLenum target, GLenum attachment, GLenum pname, GLint *params);
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extern PFNglGetFramebufferAttachmentParameteriv pfnglGetFramebufferAttachmentParameteriv;
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