GrTessellator: abstract vertex allocation into caller

src/gpu/GrTessellator.h

Index: src/gpu/GrTessellator.h
diff --git a/src/gpu/GrTessellator.h b/src/gpu/GrTessellator.h
index 4304920fbc024856a9f5d7bc7fc09cf72a9d1a5d..298e8bb17e5bb61b331c40714e35f97a2d3e4b48 100644
--- a/src/gpu/GrTessellator.h
+++ b/src/gpu/GrTessellator.h
@@ -8,8 +8,10 @@
 #ifndef GrTessellator_DEFINED
 #define GrTessellator_DEFINED
 
-#include "SkPath.h"
-#include "GrResourceProvider.h"
+#include "SkPoint.h"
+
+class SkPath;
+struct SkRect;
 
 /**
  * Provides utility functions for converting paths to a collection of triangles.
@@ -19,6 +21,13 @@
 
 namespace GrTessellator {
 
+class VertexBuffer {

[bsalomon, 2016/03/10 15:46:24]

Reading that code below it isn't always totally obvious to me whether a vertex
buffer is a GrTessallator::VertexBuffer or a GrVertexBuffer. Can we use a
different name, e.g. VertexAllocator or VertexProvider?

[Stephen White, 2016/03/10 15:59:29]

Done.

+public:
+    virtual ~VertexBuffer() {}
+    virtual SkPoint* lock(int vertexCount) = 0;
+    virtual void unlock(int actualCount) = 0;
+};
+
 struct WindingVertex {
     SkPoint fPos;
     int fWinding;
@@ -32,9 +41,7 @@ int PathToVertices(const SkPath& path, SkScalar tolerance, const SkRect& clipBou
                    WindingVertex** verts);
 
 int PathToTriangles(const SkPath& path, SkScalar tolerance, const SkRect& clipBounds, 
-                    GrResourceProvider* resourceProvider, 
-                    SkAutoTUnref<GrVertexBuffer>& vertexBuffer, bool canMapVB, bool* isLinear);
-
+                    VertexBuffer*, bool *isLinear);
 }
 
 #endif