X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fbackends%2Fopengl%2Fpipelinestate_backend.cpp;h=204e8139f0fc70802aaf3592b68a60779a124bae;hp=8ffa47fcda75d8ea44e9ff9e74673ca54f43a21a;hb=9eb9f592d37e9a1e05c2ff70887a1c5f26b98864;hpb=29fe33d3dde1df0e11c741b0c02af2f33b685571

diff --git a/source/backends/opengl/pipelinestate_backend.cpp b/source/backends/opengl/pipelinestate_backend.cpp
index 8ffa47fc..204e8139 100644
--- a/source/backends/opengl/pipelinestate_backend.cpp
+++ b/source/backends/opengl/pipelinestate_backend.cpp
@@ -4,6 +4,7 @@
 #include <msp/gl/extensions/arb_shader_objects.h>
 #include <msp/gl/extensions/arb_uniform_buffer_object.h>
 #include <msp/gl/extensions/arb_vertex_array_object.h>
+#include <msp/gl/extensions/arb_tessellation_shader.h>
 #include <msp/gl/extensions/ext_framebuffer_object.h>
 #include <msp/gl/extensions/msp_primitive_restart.h>
 #include "blend.h"
@@ -180,6 +181,13 @@ void OpenGLPipelineState::apply() const
 		}
 	}
 
+	if(changes&PipelineState::PATCH_SIZE)
+		if(self.patch_size)
+		{
+			static Require _req(ARB_tessellation_shader);
+			glPatchParameteri(GL_PATCH_VERTICES, self.patch_size);
+		}
+
 	if(changes&PipelineState::FACE_CULL)
 	{
 		glFrontFace(self.front_face==CLOCKWISE ? GL_CW : GL_CCW);