added support for glMinSampleShading

src/gpu/gl/GrGLGpu.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLGpu.h"
 #include "GrGLGLSL.h"
 #include "GrGLStencilAttachment.h"
@@ skipping 215 matching lines @@
     fWireRectProgram.fProgram = 0;
     fWireRectArrayBuffer = 0;
     if (this->glCaps().shaderCaps()->plsPathRenderingSupport()) {
         this->createPLSSetupProgram();
     }
     else {
         memset(&fPLSSetupProgram, 0, sizeof(fPLSSetupProgram));
     }
     fHWPLSEnabled = false;
     fPLSHasBeenUsed = false;
+    fHWMinSampleShading = 0.0;
 }
 
 GrGLGpu::~GrGLGpu() {
     // Delete the path rendering explicitly, since it will need working gpu object to release the
     // resources the object itself holds.
     fPathRendering.reset();
 
     if (0 != fHWProgramID) {
         // detach the current program so there is no confusion on OpenGL's part
         // that we want it to be deleted
@@ skipping 1817 matching lines @@
                 fHWScissorSettings.fEnabled = kYes_TriState;
             }
             return;
         }
     }
 
     // See fall through note above
     this->disableScissor();
 }
 
+void GrGLGpu::flushMinSampleShading(float minSampleShading) {
+    if (fHWMinSampleShading != minSampleShading) {
+        if (minSampleShading > 0.0) {
+            GL_CALL(Enable(GR_GL_SAMPLE_SHADING));
+            GL_CALL(MinSampleShading(minSampleShading));
+        }
+        else {
+            GL_CALL(Disable(GR_GL_SAMPLE_SHADING));
+        }
+        fHWMinSampleShading = minSampleShading;
+    }
+}
+
 bool GrGLGpu::flushGLState(const GrPipeline& pipeline, const GrPrimitiveProcessor& primProc) {
     GrXferProcessor::BlendInfo blendInfo;
     pipeline.getXferProcessor().getBlendInfo(&blendInfo);
 
     this->flushColorWrite(blendInfo.fWriteColor);
     this->flushDrawFace(pipeline.getDrawFace());
+    this->flushMinSampleShading(primProc.getSampleShading());
 
     SkAutoTUnref<GrGLProgram> program(fProgramCache->refProgram(this, pipeline, primProc));
     if (!program) {
         GrCapsDebugf(this->caps(), "Failed to create program!\n");
         return false;
     }
 
     GrGLuint programID = program->programID();
     if (fHWProgramID != programID) {
         GL_CALL(UseProgram(programID));
@@ skipping 2328 matching lines @@
         if (GR_GL_TEXTURE_EXTERNAL == glTexture->target() ||
             GR_GL_TEXTURE_RECTANGLE == glTexture->target()) {
             copyParams->fFilter = GrTextureParams::kNone_FilterMode;
             copyParams->fWidth = texture->width();
             copyParams->fHeight = texture->height();
             return true;
         }
     }
     return false;
 }