New API for computing optimization invariants.

src/gpu/batches/GrDrawBatch.h

Index: src/gpu/batches/GrDrawBatch.h
diff --git a/src/gpu/batches/GrDrawBatch.h b/src/gpu/batches/GrDrawBatch.h
index b5def697c791ea7cb2aaaea0d0a24a77789be19a..53f005a5def7323da3890eadd8afd223487171f8 100644
--- a/src/gpu/batches/GrDrawBatch.h
+++ b/src/gpu/batches/GrDrawBatch.h
@@ -33,6 +33,12 @@ private:
     GrBatchToken fLastUploadToken;
 };
 
+struct GrBatchToXPOverrides {

[joshualitt, 2015/11/23 19:09:29]

GrPipelineOptimizations

+    GrProcOptInfo fColorPOI;
+    GrProcOptInfo fCoveragePOI;
+    bool fUsePLSDstRead;

[joshualitt, 2015/11/23 19:09:29]

GrBatchToXPOverrides

+};
+
 /**
  * Base class for GrBatches that draw. These batches have a GrPipeline installed by GrDrawTarget.
  */
@@ -43,8 +49,10 @@ public:
     GrDrawBatch(uint32_t classID);
     ~GrDrawBatch() override;
 
-    virtual void getInvariantOutputColor(GrInitInvariantOutput* out) const = 0;
-    virtual void getInvariantOutputCoverage(GrInitInvariantOutput* out) const = 0;
+    /**
+     * Fills in a structure informing the XP of overrides to its normal behavior.
+     */
+    void getBatchToXPOverrides(GrBatchToXPOverrides &override) const;

[joshualitt, 2015/11/23 19:09:29]

getPipelineOptimizations

 
     const GrPipeline* pipeline() const {
         SkASSERT(fPipelineInstalled);
@@ -80,6 +88,10 @@ public:
         return string;
     }
 
+protected:
+    virtual void computeBatchToXPOverrides(GrInitInvariantOutput* color, GrInitInvariantOutput* coverage,

[joshualitt, 2015/11/23 19:09:29]

line wraps.
onGetPipelineOptimizations

+                                 bool* usePLSDstRead) const = 0;
+
 private:
     /**
      * initBatchTracker is a hook for the some additional overrides / optimization possibilities