Conditionally insert gl_PointSize into shaders.

src/gpu/GrProgramDesc.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrProgramDesc.h"
 
 #include "GrProcessor.h"
 #include "GrPipeline.h"
@@ skipping 88 matching lines @@
     }
 
     fp.getGLSLProcessorKey(glslCaps, b);
 
     return gen_meta_key(fp, glslCaps, primProc.getTransformKey(fp.coordTransforms(),
                                                                fp.numCoordTransforms()), b);
 }
 
 bool GrProgramDesc::Build(GrProgramDesc* desc,
                           const GrPrimitiveProcessor& primProc,
+                          bool hasPointSize,
                           const GrPipeline& pipeline,
                           const GrGLSLCaps& glslCaps) {
     // The descriptor is used as a cache key. Thus when a field of the
     // descriptor will not affect program generation (because of the attribute
     // bindings in use or other descriptor field settings) it should be set
     // to a canonical value to avoid duplicate programs with different keys.
 
     GR_STATIC_ASSERT(0 == kProcessorKeysOffset % sizeof(uint32_t));
     // Make room for everything up to the effect keys.
     desc->key().reset();
@@ skipping 45 matching lines @@
     if (requiredFeatures & GrProcessor::kSampleLocations_RequiredFeature) {
         SkASSERT(pipeline.isHWAntialiasState());
         header->fSamplePatternKey =
             rt->renderTargetPriv().getMultisampleSpecs(pipeline.getStencil()).fUniqueID;
     } else {
         header->fSamplePatternKey = 0;
     }
 
     header->fOutputSwizzle = glslCaps.configOutputSwizzle(rt->config()).asKey();
 
-    if (pipeline.ignoresCoverage()) {
-        header->fIgnoresCoverage = 1;
-    } else {
-        header->fIgnoresCoverage = 0;
-    }
+    header->fIgnoresCoverage = pipeline.ignoresCoverage() ? 1 : 0;
 
     header->fSnapVerticesToPixelCenters = pipeline.snapVerticesToPixelCenters();
-    header->fColorEffectCnt = pipeline.numColorFragmentProcessors();
-    header->fCoverageEffectCnt = pipeline.numCoverageFragmentProcessors();
+    header->fColorFragmentProcessorCnt = pipeline.numColorFragmentProcessors();
+    header->fCoverageFragmentProcessorCnt = pipeline.numCoverageFragmentProcessors();
+    // Fail if the client requested more processors than the key can fit.
+    if (header->fColorFragmentProcessorCnt != pipeline.numColorFragmentProcessors() ||
+        header->fCoverageFragmentProcessorCnt != pipeline.numCoverageFragmentProcessors()) {
+        return false;
+    }
+    header->fHasPointSize = hasPointSize ? 1 : 0;
     return true;
 }