Re-re-land "added GrSkSLFP and converted DitherEffect to use it"

This reverts commit 6c48e4d11ce80fa5cfef56e13b2d5847fe94a7cc.

Bug: skia:
Change-Id: I7ee78990fc30eec545d1856e59eb6e0573089426
Reviewed-on: https://skia-review.googlesource.com/144348
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 24 insertions, 1 deletions

diff --git a/src/sksl/ir/SkSLVarDeclarations.h b/src/sksl/ir/SkSLVarDeclarations.h
index 707715f6dc..b98e959ff0 100644
--- a/src/sksl/ir/SkSLVarDeclarations.h
+++ b/src/sksl/ir/SkSLVarDeclarations.h
@@ -29,7 +29,20 @@ struct VarDeclaration : public Statement {
     , fSizes(std::move(sizes))
     , fValue(std::move(value)) {}
 
-    String description() const {
+    std::unique_ptr<Statement> clone() const override {
+        std::vector<std::unique_ptr<Expression>> sizesClone;
+        for (const auto& s : fSizes) {
+            if (s) {
+                sizesClone.push_back(s->clone());
+            } else {
+                sizesClone.push_back(nullptr);
+            }
+        }
+        return std::unique_ptr<Statement>(new VarDeclaration(fVar, std::move(sizesClone),
+                                                             fValue ? fValue->clone() : nullptr));
+    }
+
+    String description() const override {
         String result = fVar->fName;
         for (const auto& size : fSizes) {
             if (size) {
@@ -64,6 +77,16 @@ struct VarDeclarations : public ProgramElement {
         }
     }
 
+    std::unique_ptr<ProgramElement> clone() const override {
+        std::vector<std::unique_ptr<VarDeclaration>> cloned;
+        for (const auto& v : fVars) {
+            cloned.push_back(std::unique_ptr<VarDeclaration>(
+                                                           (VarDeclaration*) v->clone().release()));
+        }
+        return std::unique_ptr<ProgramElement>(new VarDeclarations(fOffset, &fBaseType,
+                                                                     std::move(cloned)));
+    }
+
     String description() const override {
         if (!fVars.size()) {
             return String();