Revert of Revert of Move DstCopy on gpu into the GrXferProcessor. (patchset #1 id:1 of https://codereview.chromium.org/901663007/)

Reason for revert:
The revert didn't help the 10.9 bot. Unreverting by reverting the revert (which is basically relanding the original patch which itself was a revert of a revert). Revert.

Original issue's description:
> Revert of Move DstCopy on gpu into the GrXferProcessor. (patchset #11 id:200001 of https://codereview.chromium.org/885923002/)
>
> Reason for revert:
> Testing to see if reverting fixes 10.9 bots.
>
> Original issue's description:
> > Move DstCopy on gpu into the GrXferProcessor.
> >
> > BUG=skia:
> >
> > Committed: https://skia.googlesource.com/skia/+/74a11753604768bf461b80cabb66060e8564d82c
> >
> > Committed: https://skia.googlesource.com/skia/+/5e1378d0e075a323144ba14e0a4cbcca35eccc69
>
> TBR=joshualitt@google.com,egdaniel@google.com
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/21b2c53218ab25f4268e3992e51d916076a2a7ee

TBR=joshualitt@google.com,egdaniel@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/873723009

1 files changed, 14 insertions, 4 deletions

diff --git a/src/gpu/gl/GrGLXferProcessor.h b/src/gpu/gl/GrGLXferProcessor.h
index 5c92559031..7f60f32fe5 100644
--- a/src/gpu/gl/GrGLXferProcessor.h
+++ b/src/gpu/gl/GrGLXferProcessor.h
@@ -11,6 +11,7 @@
 #include "GrGLProcessor.h"
 
 class GrGLXPBuilder;
+class GrXferProcessor;
 
 class GrGLXferProcessor {
 public:
@@ -46,16 +47,25 @@ public:
      * This is similar to emitCode() in the base class, except it takes a full shader builder.
      * This allows the effect subclass to emit vertex code.
      */
-    virtual void emitCode(const EmitArgs&) = 0;
+    void emitCode(const EmitArgs&);
 
     /** A GrGLXferProcessor instance can be reused with any GrGLXferProcessor that produces
         the same stage key; this function reads data from a GrGLXferProcessor and uploads any
         uniform variables required  by the shaders created in emitCode(). The GrXferProcessor
         parameter is guaranteed to be of the same type that created this GrGLXferProcessor and
-        to have an identical processor key as the one that created this GrGLXferProcessor.  */
-    virtual void setData(const GrGLProgramDataManager&,
-                         const GrXferProcessor&) = 0;
+        to have an identical processor key as the one that created this GrGLXferProcessor. This
+        function calls onSetData on the subclass of GrGLXferProcessor
+     */
+    void setData(const GrGLProgramDataManager& pdm, const GrXferProcessor& xp);
+
 private:
+    virtual void onEmitCode(const EmitArgs&) = 0;
+
+    virtual void onSetData(const GrGLProgramDataManager&, const GrXferProcessor&) = 0;
+
+    GrGLProgramDataManager::UniformHandle fDstCopyTopLeftUni;
+    GrGLProgramDataManager::UniformHandle fDstCopyScaleUni;
+
     typedef GrGLProcessor INHERITED;
 };
 #endif