Multi-string shaders

src/gpu/gl/builders/GrGLProgramBuilder.h

Index: src/gpu/gl/builders/GrGLProgramBuilder.h
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.h b/src/gpu/gl/builders/GrGLProgramBuilder.h
index 37908f997174e9a40cf7533fbdf6076b6f6c8eb3..46d2816c521e9e021eb62773727560e8d5bc343d 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.h
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.h
@@ -356,7 +356,12 @@ protected:
     };
     class AutoStageAdvance {
     public:
-        AutoStageAdvance(GrGLProgramBuilder* pb) : fPB(pb) { fPB->reset(); }
+        AutoStageAdvance(GrGLProgramBuilder* pb)
+            : fPB(pb) {
+            fPB->reset();
+            // Each output to the fragment processor gets its own code section
+            fPB->fFS.nextStage();
+        }
         ~AutoStageAdvance() { fPB->exitStage(); }
     private:
         GrGLProgramBuilder* fPB;