Update how we send draws to gpu backend to reduce state setting.

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 9725590544fbc599bf91df5317462e764108c623..7bbbd0572f5eaeb7988ecab06e3626bf3637c536 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -353,10 +353,6 @@ public:
     // is dirty.
     ResetTimestamp getResetTimestamp() const { return fResetTimestamp; }
 
-    virtual void buildProgramDesc(GrProgramDesc*,
-                                  const GrPrimitiveProcessor&,
-                                  const GrPipeline&) const = 0;
-
     // Called to perform a surface to surface copy. Fallbacks to issuing a draw from the src to dst
     // take place at the GrDrawTarget level and this function implement faster copy paths. The rect
     // and point are pre-clipped. The src rect and implied dst rect are guaranteed to be within the
@@ -396,7 +392,14 @@ public:
         const GrProgramDesc* fDesc;
     };
 
-    void draw(const DrawArgs&, const GrVertices&);
+    // We pass in an array of drawCount GrVertices to the draw. The backend should loop over each
+    // GrVertices object and emit a draw for it. Each draw will use the same GrPipeline and
+    // GrPrimitiveProcessor.
+    void draw(const GrPipeline&,
+              const GrPrimitiveProcessor&,
+              GrPrimitiveType primitiveType,
+              const GrVertices*,
+              int drawCount);

[bsalomon, 2016/03/16 20:07:22]

verticesCnt? Had to think for a bit to remember that it was the count for the
GrVertices array.

[egdaniel, 2016/03/17 15:09:36]

changed to meshCount

 
     // Called by drawtarget when flushing. 
     // Provides a hook for post-flush actions (e.g. PLS reset and Vulkan command buffer submits).
@@ -577,7 +580,11 @@ private:
     virtual void onClearStencilClip(GrRenderTarget*, const SkIRect& rect, bool insideClip) = 0;
 
     // overridden by backend-specific derived class to perform the draw call.
-    virtual void onDraw(const DrawArgs&, const GrNonInstancedVertices&) = 0;
+    virtual void onDraw(const GrPipeline&,
+                        const GrPrimitiveProcessor&,
+                        GrPrimitiveType primitiveType,
+                        const GrVertices*,
+                        int drawCount) = 0;
 
     virtual bool onMakeCopyForTextureParams(GrTexture* texture, const GrTextureParams&,
                                             GrTextureProducer::CopyParams*) const { return false; }