GL_KHR_debug http://www.opengl.org/registry/specs/KHR/debug.txt GL_KHR_debug GL_CONTEXT_FLAG_DEBUG_BIT 0x00000002 GL_STACK_OVERFLOW 0x0503 GL_STACK_UNDERFLOW 0x0504 GL_DEBUG_OUTPUT_SYNCHRONOUS 0x8242 GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH 0x8243 GL_DEBUG_CALLBACK_FUNCTION 0x8244 GL_DEBUG_CALLBACK_USER_PARAM 0x8245 GL_DEBUG_SOURCE_API 0x8246 GL_DEBUG_SOURCE_WINDOW_SYSTEM 0x8247 GL_DEBUG_SOURCE_SHADER_COMPILER 0x8248 GL_DEBUG_SOURCE_THIRD_PARTY 0x8249 GL_DEBUG_SOURCE_APPLICATION 0x824A GL_DEBUG_SOURCE_OTHER 0x824B GL_DEBUG_TYPE_ERROR 0x824C GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR 0x824D GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR 0x824E GL_DEBUG_TYPE_PORTABILITY 0x824F GL_DEBUG_TYPE_PERFORMANCE 0x8250 GL_DEBUG_TYPE_OTHER 0x8251 GL_DEBUG_TYPE_MARKER 0x8268 GL_DEBUG_TYPE_PUSH_GROUP 0x8269 GL_DEBUG_TYPE_POP_GROUP 0x826A GL_DEBUG_SEVERITY_NOTIFICATION 0x826B GL_MAX_DEBUG_GROUP_STACK_DEPTH 0x826C GL_DEBUG_GROUP_STACK_DEPTH 0x826D GL_BUFFER 0x82E0 GL_SHADER 0x82E1 GL_PROGRAM 0x82E2 GL_QUERY 0x82E3 GL_PROGRAM_PIPELINE 0x82E4 GL_SAMPLER 0x82E6 GL_DISPLAY_LIST 0x82E7 GL_MAX_LABEL_LENGTH 0x82E8 GL_MAX_DEBUG_MESSAGE_LENGTH 0x9143 GL_MAX_DEBUG_LOGGED_MESSAGES 0x9144 GL_DEBUG_LOGGED_MESSAGES 0x9145 GL_DEBUG_SEVERITY_HIGH 0x9146 GL_DEBUG_SEVERITY_MEDIUM 0x9147 GL_DEBUG_SEVERITY_LOW 0x9148 GL_DEBUG_OUTPUT 0x92E0 void glDebugMessageCallback (GLDEBUGPROC callback, void* userParam) void glDebugMessageControl (GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint* ids, GLboolean enabled) void glDebugMessageInsert (GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* buf) GLuint glGetDebugMessageLog (GLuint count, GLsizei bufsize, GLenum* sources, GLenum* types, GLuint* ids, GLenum* severities, GLsizei* lengths, GLchar* messageLog) void glGetObjectLabel (GLenum identifier, GLuint name, GLsizei bufSize, GLsizei* length, GLchar *label) void glGetObjectPtrLabel (void* ptr, GLsizei bufSize, GLsizei* length, GLchar *label) void glGetPointerv (GLenum pname, void** params) void glObjectLabel (GLenum identifier, GLuint name, GLsizei length, const GLchar* label) void glObjectPtrLabel (void* ptr, GLsizei length, const GLchar* label) void glPushDebugGroup (GLenum source, GLuint id, GLsizei length, const GLchar * message) typedef void (APIENTRY *GLDEBUGPROC)(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* message, GLvoid* userParam)