Move GrInvariantOutput out of GrProcessor and into its own class.

src/gpu/GrProcessor.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrProcessor.h"
 #include "GrBackendProcessorFactory.h"
 #include "GrContext.h"
 #include "GrCoordTransform.h"
+#include "GrInvariantOutput.h"
 #include "GrMemoryPool.h"
 #include "SkTLS.h"
 
 #if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
 
 /*
  * Originally these were both in the processor unit test header, but then it seemed to cause linker
  * problems on android.
  */
 template<>
@@ skipping 99 matching lines @@
         return false;
     }
     for (int i = 0; i < this->numTextures(); ++i) {
         if (this->textureAccess(i) != that.textureAccess(i)) {
             return false;
         }
     }
     return true;
 }
 
+void GrProcessor::computeInvariantOutput(GrInvariantOutput* inout) const {
+    inout->resetWillUseInputColor();
+    this->onComputeInvariantOutput(inout);
 #ifdef SK_DEBUG
-
-void GrProcessor::InvariantOutput::validate() const {
-    if (fIsSingleComponent) {
-        SkASSERT(0 == fValidFlags || kRGBA_GrColorComponentFlags == fValidFlags);
-        if (kRGBA_GrColorComponentFlags == fValidFlags) {
-            SkASSERT(this->colorComponentsAllEqual());
-        }
-    }
-
-    SkASSERT(this->validPreMulColor());
-
-    // If we claim that we are not using the input color we must not be modulating the input.
-    SkASSERT(fNonMulStageFound || fWillUseInputColor);
+    inout->validate();
+#endif
 }
 
-bool GrProcessor::InvariantOutput::colorComponentsAllEqual() const {
-    unsigned colorA = GrColorUnpackA(fColor);
-    return(GrColorUnpackR(fColor) == colorA &&
-           GrColorUnpackG(fColor) == colorA &&
-           GrColorUnpackB(fColor) == colorA);
-}
-
-bool GrProcessor::InvariantOutput::validPreMulColor() const {
-    if (kA_GrColorComponentFlag & fValidFlags) {
-        float c[4];
-        GrColorToRGBAFloat(fColor, c);
-        if (kR_GrColorComponentFlag & fValidFlags) {
-            if (c[0] > c[3]) {
-                return false;
-            }
-        }
-        if (kG_GrColorComponentFlag & fValidFlags) {
-            if (c[1] > c[3]) {
-                return false;
-            }
-        }
-        if (kB_GrColorComponentFlag & fValidFlags) {
-            if (c[2] > c[3]) {
-                return false;
-            }
-        }
-    }
-    return true;
-}
-#endif // end DEBUG
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 void GrFragmentProcessor::addCoordTransform(const GrCoordTransform* transform) {
     fCoordTransforms.push_back(transform);
     SkDEBUGCODE(transform->setInProcessor();)
 }
 
 bool GrFragmentProcessor::hasSameTransforms(const GrFragmentProcessor& that) const {
     if (fCoordTransforms.count() != that.fCoordTransforms.count()) {
         return false;
     }
     int count = fCoordTransforms.count();
     for (int i = 0; i < count; ++i) {
         if (*fCoordTransforms[i] != *that.fCoordTransforms[i]) {
             return false;
         }
     }
     return true;
 }