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>

1 files changed, 3 insertions, 14 deletions

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();
         }
     }