#define GL_CLAMP_TO_EDGE 0x812F
#endif
+//GL_ATI_separate_stencil
+extern int gl_support_separatestencil;
+#ifndef GL_STENCIL_BACK_FUNC
+#define GL_STENCIL_BACK_FUNC 0x8800
+#define GL_STENCIL_BACK_FAIL 0x8801
+#define GL_STENCIL_BACK_PASS_DEPTH_FAIL 0x8802
+#define GL_STENCIL_BACK_PASS_DEPTH_PASS 0x8803
+#endif
+extern void (GLAPIENTRY *qglStencilOpSeparate)(GLenum, GLenum, GLenum, GLenum);
+extern void (GLAPIENTRY *qglStencilFuncSeparate)(GLenum, GLenum, GLint, GLuint);
+
//GL_EXT_stencil_two_side
#define GL_STENCIL_TEST_TWO_SIDE_EXT 0x8910
#define GL_ACTIVE_STENCIL_FACE_EXT 0x8911
extern void (GLAPIENTRY *qglActiveStencilFaceEXT)(GLenum);
extern int gl_support_stenciltwoside;
+//GL_EXT_blend_minmax
+extern int gl_support_ext_blend_minmax;
+#ifndef GL_FUNC_ADD_EXT
+#define GL_FUNC_ADD_EXT 0x8006 // also supplied by GL_EXT_blend_subtract
+#define GL_MIN_EXT 0x8007
+#define GL_MAX_EXT 0x8008
+#define GL_BLEND_EQUATION_EXT 0x8009 // also supplied by GL_EXT_blend_subtract
+extern void (GLAPIENTRY *qglBlendEquationEXT)(GLenum); // also supplied by GL_EXT_blend_subtract
+#endif
+
+//GL_EXT_blend_subtract
+extern int gl_support_ext_blend_subtract;
+#ifndef GL_FUNC_SUBTRACT_EXT
+#define GL_FUNC_SUBTRACT_EXT 0x800A
+#define GL_FUNC_REVERSE_SUBTRACT_EXT 0x800B
+#endif
+
//GL_ARB_texture_non_power_of_two
extern int gl_support_arb_texture_non_power_of_two;