Implement stencil clipping in mixed sampled render targets
This change enables multisampled clipping for mixed sampled
render targets. Previously clipping in mixed samples config
behaved the same as in the gpu config.
In order to retrofit non-MSAA draw methods, programmable sample
locations are used in order to colocate all samples at (0.5, 0.5).
Requires support for NV_sample_locations.
BUG=skia:4399
Review URL: https://codereview.chromium.org/1232103002
diff --git a/include/gpu/gl/GrGLFunctions.h b/include/gpu/gl/GrGLFunctions.h
index aea6d2c..7fe82d6 100644
--- a/include/gpu/gl/GrGLFunctions.h
+++ b/include/gpu/gl/GrGLFunctions.h
@@ -390,6 +390,8 @@
typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetVertexArrayPointeri_vProc)(GrGLuint vaobj, GrGLuint index, GrGLenum pname, GrGLvoid **param);
typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapNamedBufferRangeProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length, GrGLbitfield access);
typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFlushMappedNamedBufferRangeProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length);
+// OpenGL 4.5
+typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedFramebufferParameteriProc)(GrGLuint framebuffer, GrGLenum pname, GrGLint param);
/* KHR_debug */
typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDebugMessageControlProc)(GrGLenum source, GrGLenum type, GrGLenum severity, GrGLsizei count, const GrGLuint* ids, GrGLboolean enabled);
diff --git a/include/gpu/gl/GrGLInterface.h b/include/gpu/gl/GrGLInterface.h
index bdbedd9..c4748c7 100644
--- a/include/gpu/gl/GrGLInterface.h
+++ b/include/gpu/gl/GrGLInterface.h
@@ -490,6 +490,8 @@
GLPtr<GrGLGetVertexArrayPointeri_vProc> fGetVertexArrayPointeri_v;
GLPtr<GrGLMapNamedBufferRangeProc> fMapNamedBufferRange;
GLPtr<GrGLFlushMappedNamedBufferRangeProc> fFlushMappedNamedBufferRange;
+ // OpenGL 4.5
+ GLPtr<GrGLNamedFramebufferParameteriProc> fNamedFramebufferParameteri;
/* KHR_debug */
GLPtr<GrGLDebugMessageControlProc> fDebugMessageControl;