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GL_EXT_texture_buffer_object
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http://developer.download.nvidia.com/opengl/specs/GL_EXT_texture_buffer_object.txt
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GL_TEXTURE_BUFFER_EXT 0x8C2A
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GL_MAX_TEXTURE_BUFFER_SIZE_EXT 0x8C2B
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GL_TEXTURE_BINDING_BUFFER_EXT 0x8C2C
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GL_TEXTURE_BUFFER_DATA_STORE_BINDING_EXT 0x8C2D
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GL_TEXTURE_BUFFER_FORMAT_EXT 0x8C2E
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void glTexBufferEXT (GLenum target, GLenum internalformat, GLuint buffer)