Re-land sksl fragment processor support

This reverts commit ed50200682e0de72c3abecaa4d5324ebcd1ed9f9.

Bug: skia:
Change-Id: I9caa7454b391450620d6989dc472abb3cf7a2cab
Reviewed-on: https://skia-review.googlesource.com/20965
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/sksl/SkSLUtil.h b/src/sksl/SkSLUtil.h
index b56ae16d2c..64f1e8154e 100644
--- a/src/sksl/SkSLUtil.h
+++ b/src/sksl/SkSLUtil.h
@@ -135,6 +135,10 @@ public:
         return false;
     }
 
+    bool floatPrecisionVaries() const {
+        return false;
+    }
+
     const char* shaderDerivativeExtensionString() const {
         return nullptr;
     }
@@ -210,6 +214,7 @@ public:
         result->fVersionDeclString = "#version 400";
         result->fShaderDerivativeSupport = true;
         result->fShaderDerivativeExtensionString = "GL_OES_standard_derivatives";
+        result->fUsesPrecisionModifiers = true;
         return result;
     }