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diff --git a/src/renderergl2/qgl2.h b/src/renderergl2/qgl2.h
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+++ b/src/renderergl2/qgl2.h
@@ -0,0 +1,407 @@
+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+
+This file is part of Quake III Arena source code.
+
+Quake III Arena source code 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 2 of the License,
+or (at your option) any later version.
+
+Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+===========================================================================
+*/
+/*
+** QGL.H
+*/
+
+#ifndef __QGL2_H__
+#define __QGL2_H__
+
+#include "../renderercommon/qgl.h"
+
+// GL_EXT_draw_range_elements
+extern void (APIENTRY * qglDrawRangeElementsEXT) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
+
+// GL_EXT_multi_draw_arrays
+extern void (APIENTRY * qglMultiDrawArraysEXT) (GLenum, GLint *, GLsizei *, GLsizei);
+extern void (APIENTRY * qglMultiDrawElementsEXT) (GLenum, const GLsizei *, GLenum, const GLvoid **, GLsizei);
+
+// GL_ARB_shading_language_100
+#ifndef GL_ARB_shading_language_100
+#define GL_ARB_shading_language_100
+#define GL_SHADING_LANGUAGE_VERSION_ARB 0x8B8C
+#endif
+
+// GL_ARB_vertex_program
+extern void (APIENTRY * qglVertexAttrib4fARB) (GLuint, GLfloat, GLfloat, GLfloat, GLfloat);
+extern void (APIENTRY * qglVertexAttrib4fvARB) (GLuint, const GLfloat *);
+extern void (APIENTRY * qglVertexAttribPointerARB) (GLuint index, GLint size, GLenum type, GLboolean normalized,
+ GLsizei stride, const GLvoid * pointer);
+extern void (APIENTRY * qglEnableVertexAttribArrayARB) (GLuint index);
+extern void (APIENTRY * qglDisableVertexAttribArrayARB) (GLuint index);
+
+// GL_ARB_vertex_buffer_object
+extern void (APIENTRY * qglBindBufferARB) (GLenum target, GLuint buffer);
+extern void (APIENTRY * qglDeleteBuffersARB) (GLsizei n, const GLuint * buffers);
+extern void (APIENTRY * qglGenBuffersARB) (GLsizei n, GLuint * buffers);
+extern GLboolean(APIENTRY * qglIsBufferARB) (GLuint buffer);
+extern void (APIENTRY * qglBufferDataARB) (GLenum target, GLsizeiptrARB size, const GLvoid * data, GLenum usage);
+extern void (APIENTRY * qglBufferSubDataARB) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid * data);
+extern void (APIENTRY * qglGetBufferSubDataARB) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid * data);
+extern void (APIENTRY * qglGetBufferParameterivARB) (GLenum target, GLenum pname, GLint * params);
+extern void (APIENTRY * qglGetBufferPointervARB) (GLenum target, GLenum pname, GLvoid * *params);
+
+// GL_ARB_shader_objects
+extern void (APIENTRY * qglDeleteObjectARB) (GLhandleARB obj);
+extern GLhandleARB(APIENTRY * qglGetHandleARB) (GLenum pname);
+extern void (APIENTRY * qglDetachObjectARB) (GLhandleARB containerObj, GLhandleARB attachedObj);
+extern GLhandleARB(APIENTRY * qglCreateShaderObjectARB) (GLenum shaderType);
+extern void (APIENTRY * qglShaderSourceARB) (GLhandleARB shaderObj, GLsizei count, const GLcharARB * *string,
+ const GLint * length);
+extern void (APIENTRY * qglCompileShaderARB) (GLhandleARB shaderObj);
+extern GLhandleARB(APIENTRY * qglCreateProgramObjectARB) (void);
+extern void (APIENTRY * qglAttachObjectARB) (GLhandleARB containerObj, GLhandleARB obj);
+extern void (APIENTRY * qglLinkProgramARB) (GLhandleARB programObj);
+extern void (APIENTRY * qglUseProgramObjectARB) (GLhandleARB programObj);
+extern void (APIENTRY * qglValidateProgramARB) (GLhandleARB programObj);
+extern void (APIENTRY * qglUniform1fARB) (GLint location, GLfloat v0);
+extern void (APIENTRY * qglUniform2fARB) (GLint location, GLfloat v0, GLfloat v1);
+extern void (APIENTRY * qglUniform3fARB) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
+extern void (APIENTRY * qglUniform4fARB) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
+extern void (APIENTRY * qglUniform1iARB) (GLint location, GLint v0);
+extern void (APIENTRY * qglUniform2iARB) (GLint location, GLint v0, GLint v1);
+extern void (APIENTRY * qglUniform3iARB) (GLint location, GLint v0, GLint v1, GLint v2);
+extern void (APIENTRY * qglUniform4iARB) (GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
+extern void (APIENTRY * qglUniform1fvARB) (GLint location, GLsizei count, const GLfloat * value);
+extern void (APIENTRY * qglUniform2fvARB) (GLint location, GLsizei count, const GLfloat * value);
+extern void (APIENTRY * qglUniform3fvARB) (GLint location, GLsizei count, const GLfloat * value);
+extern void (APIENTRY * qglUniform4fvARB) (GLint location, GLsizei count, const GLfloat * value);
+extern void (APIENTRY * qglUniform2ivARB) (GLint location, GLsizei count, const GLint * value);
+extern void (APIENTRY * qglUniform3ivARB) (GLint location, GLsizei count, const GLint * value);
+extern void (APIENTRY * qglUniform4ivARB) (GLint location, GLsizei count, const GLint * value);
+extern void (APIENTRY * qglUniformMatrix2fvARB) (GLint location, GLsizei count, GLboolean transpose, const GLfloat * value);
+extern void (APIENTRY * qglUniformMatrix3fvARB) (GLint location, GLsizei count, GLboolean transpose, const GLfloat * value);
+extern void (APIENTRY * qglUniformMatrix4fvARB) (GLint location, GLsizei count, GLboolean transpose, const GLfloat * value);
+extern void (APIENTRY * qglGetObjectParameterfvARB) (GLhandleARB obj, GLenum pname, GLfloat * params);
+extern void (APIENTRY * qglGetObjectParameterivARB) (GLhandleARB obj, GLenum pname, GLint * params);
+extern void (APIENTRY * qglGetInfoLogARB) (GLhandleARB obj, GLsizei maxLength, GLsizei * length, GLcharARB * infoLog);
+extern void (APIENTRY * qglGetAttachedObjectsARB) (GLhandleARB containerObj, GLsizei maxCount, GLsizei * count,
+ GLhandleARB * obj);
+extern GLint(APIENTRY * qglGetUniformLocationARB) (GLhandleARB programObj, const GLcharARB * name);
+extern void (APIENTRY * qglGetActiveUniformARB) (GLhandleARB programObj, GLuint index, GLsizei maxIndex, GLsizei * length,
+ GLint * size, GLenum * type, GLcharARB * name);
+extern void (APIENTRY * qglGetUniformfvARB) (GLhandleARB programObj, GLint location, GLfloat * params);
+extern void (APIENTRY * qglGetUniformivARB) (GLhandleARB programObj, GLint location, GLint * params);
+extern void (APIENTRY * qglGetShaderSourceARB) (GLhandleARB obj, GLsizei maxLength, GLsizei * length, GLcharARB * source);
+
+// GL_ARB_vertex_shader
+extern void (APIENTRY * qglBindAttribLocationARB) (GLhandleARB programObj, GLuint index, const GLcharARB * name);
+extern void (APIENTRY * qglGetActiveAttribARB) (GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei * length,
+ GLint * size, GLenum * type, GLcharARB * name);
+extern GLint(APIENTRY * qglGetAttribLocationARB) (GLhandleARB programObj, const GLcharARB * name);
+
+// GL_ARB_texture_compression
+extern void (APIENTRY * qglCompressedTexImage3DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height,
+ GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
+extern void (APIENTRY * qglCompressedTexImage2DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height,
+ GLint border, GLsizei imageSize, const GLvoid *data);
+extern void (APIENTRY * qglCompressedTexImage1DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border,
+ GLsizei imageSize, const GLvoid *data);
+extern void (APIENTRY * qglCompressedTexSubImage3DARB)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+ GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const GLvoid *data);
+extern void (APIENTRY * qglCompressedTexSubImage2DARB)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+ GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *data);
+extern void (APIENTRY * qglCompressedTexSubImage1DARB)(GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format,
+ GLsizei imageSize, const GLvoid *data);
+extern void (APIENTRY * qglGetCompressedTexImageARB)(GLenum target, GLint lod,
+ GLvoid *img);
+
+// GL_NVX_gpu_memory_info
+#ifndef GL_NVX_gpu_memory_info
+#define GL_NVX_gpu_memory_info
+#define GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX 0x9047
+#define GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX 0x9048
+#define GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX 0x9049
+#define GL_GPU_MEMORY_INFO_EVICTION_COUNT_NVX 0x904A
+#define GL_GPU_MEMORY_INFO_EVICTED_MEMORY_NVX 0x904B
+#endif
+
+// GL_ATI_meminfo
+#ifndef GL_ATI_meminfo
+#define GL_ATI_meminfo
+#define GL_VBO_FREE_MEMORY_ATI 0x87FB
+#define GL_TEXTURE_FREE_MEMORY_ATI 0x87FC
+#define GL_RENDERBUFFER_FREE_MEMORY_ATI 0x87FD
+#endif
+
+// GL_ARB_texture_float
+#ifndef GL_ARB_texture_float
+#define GL_ARB_texture_float
+#define GL_TEXTURE_RED_TYPE_ARB 0x8C10
+#define GL_TEXTURE_GREEN_TYPE_ARB 0x8C11
+#define GL_TEXTURE_BLUE_TYPE_ARB 0x8C12
+#define GL_TEXTURE_ALPHA_TYPE_ARB 0x8C13
+#define GL_TEXTURE_LUMINANCE_TYPE_ARB 0x8C14
+#define GL_TEXTURE_INTENSITY_TYPE_ARB 0x8C15
+#define GL_TEXTURE_DEPTH_TYPE_ARB 0x8C16
+#define GL_UNSIGNED_NORMALIZED_ARB 0x8C17
+#define GL_RGBA32F_ARB 0x8814
+#define GL_RGB32F_ARB 0x8815
+#define GL_ALPHA32F_ARB 0x8816
+#define GL_INTENSITY32F_ARB 0x8817
+#define GL_LUMINANCE32F_ARB 0x8818
+#define GL_LUMINANCE_ALPHA32F_ARB 0x8819
+#define GL_RGBA16F_ARB 0x881A
+#define GL_RGB16F_ARB 0x881B
+#define GL_ALPHA16F_ARB 0x881C
+#define GL_INTENSITY16F_ARB 0x881D
+#define GL_LUMINANCE16F_ARB 0x881E
+#define GL_LUMINANCE_ALPHA16F_ARB 0x881F
+#endif
+
+#ifndef GL_ARB_half_float_pixel
+#define GL_ARB_half_float_pixel
+#define GL_HALF_FLOAT_ARB 0x140B
+#endif
+
+// GL_EXT_framebuffer_object
+extern GLboolean (APIENTRY * qglIsRenderbufferEXT)(GLuint renderbuffer);
+extern void (APIENTRY * qglBindRenderbufferEXT)(GLenum target, GLuint renderbuffer);
+extern void (APIENTRY * qglDeleteRenderbuffersEXT)(GLsizei n, const GLuint *renderbuffers);
+extern void (APIENTRY * qglGenRenderbuffersEXT)(GLsizei n, GLuint *renderbuffers);
+extern void (APIENTRY * qglRenderbufferStorageEXT)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+extern void (APIENTRY * qglGetRenderbufferParameterivEXT)(GLenum target, GLenum pname, GLint *params);
+extern GLboolean (APIENTRY * qglIsFramebufferEXT)(GLuint framebuffer);
+extern void (APIENTRY * qglBindFramebufferEXT)(GLenum target, GLuint framebuffer);
+extern void (APIENTRY * qglDeleteFramebuffersEXT)(GLsizei n, const GLuint *framebuffers);
+extern void (APIENTRY * qglGenFramebuffersEXT)(GLsizei n, GLuint *framebuffers);
+extern GLenum (APIENTRY * qglCheckFramebufferStatusEXT)(GLenum target);
+extern void (APIENTRY * qglFramebufferTexture1DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture,
+ GLint level);
+extern void (APIENTRY * qglFramebufferTexture2DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture,
+ GLint level);
+extern void (APIENTRY * qglFramebufferTexture3DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture,
+ GLint level, GLint zoffset);
+extern void (APIENTRY * qglFramebufferRenderbufferEXT)(GLenum target, GLenum attachment, GLenum renderbuffertarget,
+ GLuint renderbuffer);
+extern void (APIENTRY * qglGetFramebufferAttachmentParameterivEXT)(GLenum target, GLenum attachment, GLenum pname, GLint *params);
+extern void (APIENTRY * qglGenerateMipmapEXT)(GLenum target);
+
+#ifndef GL_EXT_framebuffer_object
+#define GL_EXT_framebuffer_object
+#define GL_FRAMEBUFFER_EXT 0x8D40
+#define GL_RENDERBUFFER_EXT 0x8D41
+#define GL_STENCIL_INDEX1_EXT 0x8D46
+#define GL_STENCIL_INDEX4_EXT 0x8D47
+#define GL_STENCIL_INDEX8_EXT 0x8D48
+#define GL_STENCIL_INDEX16_EXT 0x8D49
+#define GL_RENDERBUFFER_WIDTH_EXT 0x8D42
+#define GL_RENDERBUFFER_HEIGHT_EXT 0x8D43
+#define GL_RENDERBUFFER_INTERNAL_FORMAT_EXT 0x8D44
+#define GL_RENDERBUFFER_RED_SIZE_EXT 0x8D50
+#define GL_RENDERBUFFER_GREEN_SIZE_EXT 0x8D51
+#define GL_RENDERBUFFER_BLUE_SIZE_EXT 0x8D52
+#define GL_RENDERBUFFER_ALPHA_SIZE_EXT 0x8D53
+#define GL_RENDERBUFFER_DEPTH_SIZE_EXT 0x8D54
+#define GL_RENDERBUFFER_STENCIL_SIZE_EXT 0x8D55
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT 0x8CD0
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT 0x8CD1
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT 0x8CD2
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT 0x8CD3
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT 0x8CD4
+#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
+#define GL_COLOR_ATTACHMENT1_EXT 0x8CE1
+#define GL_COLOR_ATTACHMENT2_EXT 0x8CE2
+#define GL_COLOR_ATTACHMENT3_EXT 0x8CE3
+#define GL_COLOR_ATTACHMENT4_EXT 0x8CE4
+#define GL_COLOR_ATTACHMENT5_EXT 0x8CE5
+#define GL_COLOR_ATTACHMENT6_EXT 0x8CE6
+#define GL_COLOR_ATTACHMENT7_EXT 0x8CE7
+#define GL_COLOR_ATTACHMENT8_EXT 0x8CE8
+#define GL_COLOR_ATTACHMENT9_EXT 0x8CE9
+#define GL_COLOR_ATTACHMENT10_EXT 0x8CEA
+#define GL_COLOR_ATTACHMENT11_EXT 0x8CEB
+#define GL_COLOR_ATTACHMENT12_EXT 0x8CEC
+#define GL_COLOR_ATTACHMENT13_EXT 0x8CED
+#define GL_COLOR_ATTACHMENT14_EXT 0x8CEE
+#define GL_COLOR_ATTACHMENT15_EXT 0x8CEF
+#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
+#define GL_STENCIL_ATTACHMENT_EXT 0x8D20
+#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
+#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT 0x8CD6
+#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT 0x8CD7
+#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT 0x8CD9
+#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT 0x8CDA
+#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT 0x8CDB
+#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT 0x8CDC
+#define GL_FRAMEBUFFER_UNSUPPORTED_EXT 0x8CDD
+#define GL_FRAMEBUFFER_BINDING_EXT 0x8CA6
+#define GL_RENDERBUFFER_BINDING_EXT 0x8CA7
+#define GL_MAX_COLOR_ATTACHMENTS_EXT 0x8CDF
+#define GL_MAX_RENDERBUFFER_SIZE_EXT 0x84E8
+#define GL_INVALID_FRAMEBUFFER_OPERATION_EXT 0x0506
+#endif
+
+// GL_EXT_packed_depth_stencil
+#ifndef GL_EXT_packed_depth_stencil
+#define GL_EXT_packed_depth_stencil
+#define GL_DEPTH_STENCIL_EXT 0x84F9
+#define GL_UNSIGNED_INT_24_8_EXT 0x84FA
+#define GL_DEPTH24_STENCIL8_EXT 0x88F0
+#define GL_TEXTURE_STENCIL_SIZE_EXT 0x88F1
+#endif
+
+// GL_ARB_occlusion_query
+extern void (APIENTRY * qglGenQueriesARB)(GLsizei n, GLuint *ids);
+extern void (APIENTRY * qglDeleteQueriesARB)(GLsizei n, const GLuint *ids);
+extern GLboolean (APIENTRY * qglIsQueryARB)(GLuint id);
+extern void (APIENTRY * qglBeginQueryARB)(GLenum target, GLuint id);
+extern void (APIENTRY * qglEndQueryARB)(GLenum target);
+extern void (APIENTRY * qglGetQueryivARB)(GLenum target, GLenum pname, GLint *params);
+extern void (APIENTRY * qglGetQueryObjectivARB)(GLuint id, GLenum pname, GLint *params);
+extern void (APIENTRY * qglGetQueryObjectuivARB)(GLuint id, GLenum pname, GLuint *params);
+
+#ifndef GL_ARB_occlusion_query
+#define GL_ARB_occlusion_query
+#define GL_SAMPLES_PASSED_ARB 0x8914
+#define GL_QUERY_COUNTER_BITS_ARB 0x8864
+#define GL_CURRENT_QUERY_ARB 0x8865
+#define GL_QUERY_RESULT_ARB 0x8866
+#define GL_QUERY_RESULT_AVAILABLE_ARB 0x8867
+#endif
+
+// GL_EXT_framebuffer_blit
+extern void (APIENTRY * qglBlitFramebufferEXT)(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+ GLbitfield mask, GLenum filter);
+
+#ifndef GL_EXT_framebuffer_blit
+#define GL_EXT_framebuffer_blit
+#define GL_READ_FRAMEBUFFER_EXT 0x8CA8
+#define GL_DRAW_FRAMEBUFFER_EXT 0x8CA9
+#define GL_DRAW_FRAMEBUFFER_BINDING_EXT 0x8CA6
+#define GL_READ_FRAMEBUFFER_BINDING_EXT 0x8CAA
+#endif
+
+// GL_EXT_framebuffer_multisample
+extern void (APIENTRY * qglRenderbufferStorageMultisampleEXT)(GLenum target, GLsizei samples,
+ GLenum internalformat, GLsizei width, GLsizei height);
+
+#ifndef GL_EXT_framebuffer_multisample
+#define GL_EXT_framebuffer_multisample
+#define GL_RENDERBUFFER_SAMPLES_EXT 0x8CAB
+#define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT 0x8D56
+#define GL_MAX_SAMPLES_EXT 0x8D57
+#endif
+
+#ifndef GL_EXT_texture_sRGB
+#define GL_EXT_texture_sRGB
+#define GL_SRGB_EXT 0x8C40
+#define GL_SRGB8_EXT 0x8C41
+#define GL_SRGB_ALPHA_EXT 0x8C42
+#define GL_SRGB8_ALPHA8_EXT 0x8C43
+#define GL_SLUMINANCE_ALPHA_EXT 0x8C44
+#define GL_SLUMINANCE8_ALPHA8_EXT 0x8C45
+#define GL_SLUMINANCE_EXT 0x8C46
+#define GL_SLUMINANCE8_EXT 0x8C47
+#define GL_COMPRESSED_SRGB_EXT 0x8C48
+#define GL_COMPRESSED_SRGB_ALPHA_EXT 0x8C49
+#define GL_COMPRESSED_SLUMINANCE_EXT 0x8C4A
+#define GL_COMPRESSED_SLUMINANCE_ALPHA_EXT 0x8C4B
+#define GL_COMPRESSED_SRGB_S3TC_DXT1_EXT 0x8C4C
+#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT 0x8C4D
+#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT 0x8C4E
+#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT 0x8C4F
+#endif
+
+#ifndef GL_EXT_framebuffer_sRGB
+#define GL_EXT_framebuffer_sRGB
+#define GL_FRAMEBUFFER_SRGB_EXT 0x8DB9
+#endif
+
+#ifndef GL_EXT_texture_compression_latc
+#define GL_EXT_texture_compression_latc
+#define GL_COMPRESSED_LUMINANCE_LATC1_EXT 0x8C70
+#define GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT 0x8C71
+#define GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT 0x8C72
+#define GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT 0x8C73
+#endif
+
+#ifndef GL_ARB_texture_compression_bptc
+#define GL_ARB_texture_compression_bptc
+#define GL_COMPRESSED_RGBA_BPTC_UNORM_ARB 0x8E8C
+#define GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB 0x8E8D
+#define GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB 0x8E8E
+#define GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB 0x8E8F
+#endif
+
+// GL_ARB_draw_buffers
+extern void (APIENTRY * qglDrawBuffersARB)(GLsizei n, const GLenum *bufs);
+#ifndef GL_ARB_draw_buffers
+#define GL_ARB_draw_buffers
+#define GL_MAX_DRAW_BUFFERS_ARB 0x8824
+#define GL_DRAW_BUFFER0_ARB 0x8825
+#define GL_DRAW_BUFFER1_ARB 0x8826
+#define GL_DRAW_BUFFER2_ARB 0x8827
+#define GL_DRAW_BUFFER3_ARB 0x8828
+#define GL_DRAW_BUFFER4_ARB 0x8829
+#define GL_DRAW_BUFFER5_ARB 0x882A
+#define GL_DRAW_BUFFER6_ARB 0x882B
+#define GL_DRAW_BUFFER7_ARB 0x882C
+#define GL_DRAW_BUFFER8_ARB 0x882D
+#define GL_DRAW_BUFFER9_ARB 0x882E
+#define GL_DRAW_BUFFER10_ARB 0x882F
+#define GL_DRAW_BUFFER11_ARB 0x8830
+#define GL_DRAW_BUFFER12_ARB 0x8831
+#define GL_DRAW_BUFFER13_ARB 0x8832
+#define GL_DRAW_BUFFER14_ARB 0x8833
+#define GL_DRAW_BUFFER15_ARB 0x8834
+#endif
+
+#ifndef GL_ARB_depth_clamp
+#define GL_ARB_depth_clamp
+#define GL_DEPTH_CLAMP 0x864F
+#endif
+
+#if defined(WIN32)
+// WGL_ARB_create_context
+#ifndef WGL_ARB_create_context
+#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
+#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
+#define WGL_CONTEXT_FLAGS_ARB 0x2094
+#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
+#define WGL_CONTEXT_DEBUG_BIT_ARB 0x0001
+#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
+#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
+#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
+#define ERROR_INVALID_VERSION_ARB 0x2095
+#define ERROR_INVALID_PROFILE_ARB 0x2096
+#endif
+
+extern HGLRC(APIENTRY * qwglCreateContextAttribsARB) (HDC hdC, HGLRC hShareContext, const int *attribList);
+#endif
+
+#if 0 //defined(__linux__)
+// GLX_ARB_create_context
+#ifndef GLX_ARB_create_context
+#define GLX_CONTEXT_DEBUG_BIT_ARB 0x00000001
+#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
+#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
+#define GLX_CONTEXT_FLAGS_ARB 0x2094
+#endif
+
+extern GLXContext (APIENTRY * qglXCreateContextAttribsARB) (Display *dpy, GLXFBConfig config, GLXContext share_context, Bool direct, const int *attrib_list);
+#endif
+
+#endif