[GL 4.0] Tessellation Shader

http://www.opengl.org/registry/specs/ARB/tessellation_shader.txt

Add to enum BeginMode:

PATCHES 0xE

Create new enum PatchParameterInt.
Add to BOTH enums PatchParameterInt and GetPName:

PATCH_VERTICES 0x8E72

Create new enum PatchParameterFloatArray.
Add to BOTH enums PatchParameterFloatArray and GetPName:

PATCH_DEFAULT_INNER_LEVEL 0x8E73
PATCH_DEFAULT_OUTER_LEVEL 0x8E74

Add to enum ProgramParameter:

TESS_CONTROL_OUTPUT_VERTICES 0x8E75
TESS_GEN_MODE 0x8E76
TESS_GEN_SPACING 0x8E77
TESS_GEN_VERTEX_ORDER 0x8E78
TESS_GEN_POINT_MODE 0x8E79

Add to enum GetPName:

MAX_PATCH_VERTICES 0x8E7D
MAX_TESS_GEN_LEVEL 0x8E7E
MAX_TESS_CONTROL_UNIFORM_COMPONENTS 0x8E7F
MAX_TESS_EVALUATION_UNIFORM_COMPONENTS 0x8E80
MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS 0x8E81
MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS 0x8E82
MAX_TESS_CONTROL_OUTPUT_COMPONENTS 0x8E83
MAX_TESS_PATCH_COMPONENTS 0x8E84
MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS 0x8E85
MAX_TESS_EVALUATION_OUTPUT_COMPONENTS 0x8E86
MAX_TESS_CONTROL_UNIFORM_BLOCKS 0x8E89
MAX_TESS_EVALUATION_UNIFORM_BLOCKS 0x8E8A
MAX_TESS_CONTROL_INPUT_COMPONENTS 0x886C
MAX_TESS_EVALUATION_INPUT_COMPONENTS 0x886D
MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS 0x8E1E
MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS 0x8E1F

Add to enum ActiveUniformBlockParameter:

UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER 0x84F0
UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER 0x84F1

Add to enum ShaderType:

TESS_EVALUATION_SHADER 0x8E87
TESS_CONTROL_SHADER 0x8E88

Functions:

C: void PatchParameteri(enum pname, int value);
New: void PatchParameteri(PatchParameterInt pname, int value);

C: void PatchParameterfv(enum pname, const float *values);
New: void PatchParameterfv(PatchParameterFloatArray pname, const float *values);

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Part of spec, but we have no way to handle these. Just here to be complete:

Returned by GetProgramiv when is TESS_GEN_MODE:

TRIANGLES
QUADS
ISOLINES 0x8E7A

Returned by GetProgramiv when is TESS_GEN_SPACING:

EQUAL
FRACTIONAL_ODD 0x8E7B
FRACTIONAL_EVEN 0x8E7C

Returned by GetProgramiv when is TESS_GEN_VERTEX_ORDER:

CCW
CW

Returned by GetProgramiv when is TESS_GEN_POINT_MODE:

FALSE
TRUE