CCPR: Initial semi-optimized vertex shader Impl

Bug: skia:
Change-Id: If22f47a3b945ce7336f8e609c2e0c911f09e1d18
Reviewed-on: https://skia-review.googlesource.com/86820
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>

2 files changed, 10 insertions, 2 deletions

diff --git a/src/gpu/glsl/GrGLSLVarying.cpp b/src/gpu/glsl/GrGLSLVarying.cpp
index 4bcce0391a..5a57613b3a 100644
--- a/src/gpu/glsl/GrGLSLVarying.cpp
+++ b/src/gpu/glsl/GrGLSLVarying.cpp
@@ -37,6 +37,7 @@ void GrGLSLVaryingHandler::internalAddVarying(const char* name, GrGLSLVarying* v
     VaryingInfo& v = fVaryings.push_back();
 
     SkASSERT(varying);
+    SkASSERT(kVoid_GrSLType != varying->fType);
     v.fType = varying->fType;
     v.fIsFlat = flat;
     fProgramBuilder->nameVariable(&v.fVsOut, 'v', name);
diff --git a/src/gpu/glsl/GrGLSLVarying.h b/src/gpu/glsl/GrGLSLVarying.h
index e6174a6197..dac9bb771f 100644
--- a/src/gpu/glsl/GrGLSLVarying.h
+++ b/src/gpu/glsl/GrGLSLVarying.h
@@ -24,8 +24,15 @@ public:
         kGeoToFrag
     };
 
+    GrGLSLVarying() = default;
     GrGLSLVarying(GrSLType type, Scope scope = Scope::kVertToFrag) : fType(type), fScope(scope) {}
 
+    void reset(GrSLType type, Scope scope = Scope::kVertToFrag) {
+        *this = GrGLSLVarying();
+        fType = type;
+        fScope = scope;
+    }
+
     GrSLType type() const { return fType; }
     Scope scope() const { return fScope; }
     bool isInVertexShader() const { return Scope::kGeoToFrag != fScope; }
@@ -37,8 +44,8 @@ public:
     const char* fsIn() const { SkASSERT(this->isInFragmentShader()); return fFsIn; }
 
 private:
-    const GrSLType fType;
-    const Scope fScope;
+    GrSLType fType = kVoid_GrSLType;
+    Scope fScope = Scope::kVertToFrag;
     const char* fVsOut = nullptr;
     const char* fGsIn = nullptr;
     const char* fGsOut = nullptr;