Stop tracking whether GrFragmentProcessors read their input

Change-Id: Id5338901978b97289798eaef873527597bd8dfd6
Reviewed-on: https://skia-review.googlesource.com/7414
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>

5 files changed, 8 insertions, 21 deletions

diff --git a/src/gpu/effects/GrConstColorProcessor.cpp b/src/gpu/effects/GrConstColorProcessor.cpp
index 0efe997f78..e6568793df 100644
--- a/src/gpu/effects/GrConstColorProcessor.cpp
+++ b/src/gpu/effects/GrConstColorProcessor.cpp
@@ -64,8 +64,7 @@ private:
 
 void GrConstColorProcessor::onComputeInvariantOutput(GrInvariantOutput* inout) const {
     if (kIgnore_InputMode == fMode) {
-        inout->setToOther(kRGBA_GrColorComponentFlags, fColor.toGrColor(),
-                          GrInvariantOutput::kWillNot_ReadInput);
+        inout->setToOther(kRGBA_GrColorComponentFlags, fColor.toGrColor());
     } else {
         float r = fColor.fRGBA[0];
         bool colorIsSingleChannel = r == fColor.fRGBA[1] && r == fColor.fRGBA[2] &&
diff --git a/src/gpu/effects/GrDitherEffect.cpp b/src/gpu/effects/GrDitherEffect.cpp
index a93e74f412..2ba47d2e09 100644
--- a/src/gpu/effects/GrDitherEffect.cpp
+++ b/src/gpu/effects/GrDitherEffect.cpp
@@ -45,7 +45,7 @@ private:
 };
 
 void DitherEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
-    inout->setToUnknown(GrInvariantOutput::kWill_ReadInput);
+    inout->setToUnknown();
 }
 
 //////////////////////////////////////////////////////////////////////////////
diff --git a/src/gpu/effects/GrGammaEffect.cpp b/src/gpu/effects/GrGammaEffect.cpp
index 765612052c..8b9363e843 100644
--- a/src/gpu/effects/GrGammaEffect.cpp
+++ b/src/gpu/effects/GrGammaEffect.cpp
@@ -109,7 +109,7 @@ bool GrGammaEffect::onIsEqual(const GrFragmentProcessor& s) const {
 }
 
 void GrGammaEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
-    inout->setToUnknown(GrInvariantOutput::kWill_ReadInput);
+    inout->setToUnknown();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/src/gpu/effects/GrXfermodeFragmentProcessor.cpp b/src/gpu/effects/GrXfermodeFragmentProcessor.cpp
index d3eaee338d..d98478747a 100644
--- a/src/gpu/effects/GrXfermodeFragmentProcessor.cpp
+++ b/src/gpu/effects/GrXfermodeFragmentProcessor.cpp
@@ -42,7 +42,7 @@ protected:
     }
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
-        inout->setToUnknown(GrInvariantOutput::kWill_ReadInput);
+        inout->setToUnknown();
     }
 
 private:
@@ -197,20 +197,9 @@ protected:
                                                inout->color(), inout->validFlags(),
                                                &blendColor, &blendFlags);
             }
-            // will the shader code reference the input color?
-            GrInvariantOutput::ReadInput readsInput = GrInvariantOutput::kWillNot_ReadInput;
-            if (kDst_Child == fChild) {
-                if (kZero_GrBlendCoeff != srcCoeff || GrBlendCoeffRefsSrc(dstCoeff)) {
-                    readsInput = GrInvariantOutput::kWill_ReadInput;
-                }
-            } else {
-                if (kZero_GrBlendCoeff != dstCoeff || GrBlendCoeffRefsDst(srcCoeff)) {
-                    readsInput = GrInvariantOutput::kWill_ReadInput;
-                }
-            }
-            inout->setToOther(blendFlags, blendColor, readsInput);
+            inout->setToOther(blendFlags, blendColor);
         } else {
-            inout->setToUnknown(GrInvariantOutput::kWill_ReadInput);
+            inout->setToUnknown();
         }
     }
 
diff --git a/src/gpu/effects/GrYUVEffect.cpp b/src/gpu/effects/GrYUVEffect.cpp
index 41bab180ba..6b15c0dc72 100644
--- a/src/gpu/effects/GrYUVEffect.cpp
+++ b/src/gpu/effects/GrYUVEffect.cpp
@@ -187,8 +187,7 @@ private:
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
         // YUV is opaque
-        inout->setToOther(kA_GrColorComponentFlag, 0xFF << GrColor_SHIFT_A,
-                          GrInvariantOutput::kWillNot_ReadInput);
+        inout->setToOther(kA_GrColorComponentFlag, 0xFF << GrColor_SHIFT_A);
     }
 
     GrCoordTransform fYTransform;
@@ -348,7 +347,7 @@ private:
     }
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
-        inout->setToUnknown(GrInvariantOutput::kWillNot_ReadInput);
+        inout->setToUnknown();
     }
 
     GrCoordTransform    fTransform;