Line data    Source code

       1             : /*
       2             :  * Copyright 2014 Google Inc.
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : 
       8             : #include "GrProcessorAnalysis.h"
       9             : #include "GrGeometryProcessor.h"
      10             : #include "ops/GrDrawOp.h"
      11             : 
      12           0 : void GrColorFragmentProcessorAnalysis::analyzeProcessors(
      13             :         const GrFragmentProcessor* const* processors, int cnt) {
      14           0 :     for (int i = 0; i < cnt; ++i) {
      15           0 :         bool knowCurrentOutput = fProcessorsVisitedWithKnownOutput == fTotalProcessorsVisited;
      16           0 :         if (fUsesLocalCoords && !knowCurrentOutput &&
      17           0 :             !fAllProcessorsCompatibleWithCoverageAsAlpha && !fIsOpaque) {
      18           0 :             fTotalProcessorsVisited += cnt - i;
      19           0 :             return;
      20             :         }
      21           0 :         const GrFragmentProcessor* fp = processors[i];
      22           0 :         if (knowCurrentOutput &&
      23           0 :             fp->hasConstantOutputForConstantInput(fLastKnownOutputColor, &fLastKnownOutputColor)) {
      24           0 :             ++fProcessorsVisitedWithKnownOutput;
      25           0 :             fIsOpaque = fLastKnownOutputColor.isOpaque();
      26             :             // We reset these since the caller is expected to not use the earlier fragment
      27             :             // processors.
      28           0 :             fAllProcessorsCompatibleWithCoverageAsAlpha = true;
      29           0 :             fUsesLocalCoords = false;
      30           0 :         } else if (fIsOpaque && !fp->preservesOpaqueInput()) {
      31           0 :             fIsOpaque = false;
      32             :         }
      33           0 :         if (fAllProcessorsCompatibleWithCoverageAsAlpha && !fp->compatibleWithCoverageAsAlpha()) {
      34           0 :             fAllProcessorsCompatibleWithCoverageAsAlpha = false;
      35             :         }
      36           0 :         if (fp->usesLocalCoords()) {
      37           0 :             fUsesLocalCoords = true;
      38             :         }
      39           0 :         ++fTotalProcessorsVisited;
      40             :     }
      41             : }