Use a prioritized list of path renderers in Gr.
http://codereview.appspot.com/4867058
git-svn-id: http://skia.googlecode.com/svn/trunk@2143 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrPathRendererChain.h b/gpu/src/GrPathRendererChain.h
new file mode 100644
index 0000000..5fa8c2e
--- /dev/null
+++ b/gpu/src/GrPathRendererChain.h
@@ -0,0 +1,64 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#ifndef GrPathRendererChain_DEFINED
+#define GrPathRendererChain_DEFINED
+
+#include "GrRefCnt.h"
+#include "GrTArray.h"
+
+class GrContext;
+class GrDrawTarget;
+class SkPath;
+class GrPathRenderer;
+
+/**
+ * Keeps track of a ordered list of path renderers. When a path needs to be
+ * drawn this list is scanned to find the most preferred renderer. To add your
+ * path renderer to the list implement the GrPathRenderer::AddPathRenderers
+ * function.
+ */
+class GrPathRendererChain : public SkRefCnt {
+public:
+
+ enum UsageFlags {
+ kNone_UsageFlag = 0,
+ kNonAAOnly_UsageFlag = 1,
+ };
+
+ GrPathRendererChain(GrContext* context, UsageFlags flags);
+
+ ~GrPathRendererChain();
+
+ // takes a ref and unrefs in destructor
+ GrPathRenderer* addPathRenderer(GrPathRenderer* pr);
+
+ GrPathRenderer* getPathRenderer(const GrDrawTarget* target,
+ const SkPath& path,
+ GrPathFill fill);
+
+private:
+
+ GrPathRendererChain();
+
+ void init();
+
+ enum {
+ kPreAllocCount = 8,
+ };
+ bool fInit;
+ GrContext* fOwner;
+ UsageFlags fFlags;
+ GrAlignedSTStorage<kPreAllocCount, GrPathRenderer*> fStorage;
+ GrTArray<GrPathRenderer*, true> fChain;
+};
+
+GR_MAKE_BITFIELD_OPS(GrPathRendererChain::UsageFlags)
+
+#endif
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