Remove GrPipelineBuilder from getPathRenderer call

Logically this CL:

Moves the PathRendererChain from GrContext to GrDrawManager
   - this was needed to untangled the Path-Chain/Renderer header mess
   - this entailed adding getDrawingMgr so the CMM could access the PathRenderingChain
   - this also entailed re-adding freeGpuResources to the GrDrawingMgr
Moves the CanDrawArgs struct up stack
Removes the GrPipelineBuilder from the CanDrawArgs struct

Review URL: https://codereview.chromium.org/1407883004

1 files changed, 72 insertions, 0 deletions

diff --git a/src/gpu/GrPathRendererChain.h b/src/gpu/GrPathRendererChain.h
new file mode 100644
index 0000000000..e0e7d46f06
--- /dev/null
+++ b/src/gpu/GrPathRendererChain.h
@@ -0,0 +1,72 @@
+/*
+ * 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 "GrPathRenderer.h"
+
+#include "SkRefCnt.h"
+#include "SkTArray.h"
+
+class GrContext;
+class GrPipelineBuilder;
+class GrShaderCaps;
+class GrStrokeInfo;
+class SkMatrix;
+class SkPath;
+
+/**
+ * Keeps track of an 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:
+    GrPathRendererChain(GrContext* context);
+
+    ~GrPathRendererChain();
+
+    /** Documents how the caller plans to use a GrPathRenderer to draw a path. It affects the PR
+        returned by getPathRenderer */
+    enum DrawType {
+        kColor_DrawType,                    // draw to the color buffer, no AA
+        kColorAntiAlias_DrawType,           // draw to color buffer, with partial coverage AA
+        kStencilOnly_DrawType,              // draw just to the stencil buffer
+        kStencilAndColor_DrawType,          // draw the stencil and color buffer, no AA
+        kStencilAndColorAntiAlias_DrawType  // draw the stencil and color buffer, with partial
+                                            // coverage AA.
+    };
+
+    /** Returns a GrPathRenderer compatible with the request if one is available. If the caller
+        is drawing the path to the stencil buffer then stencilSupport can be used to determine
+        whether the path can be rendered with arbitrary stencil rules or not. See comments on
+        StencilSupport in GrPathRenderer.h. */
+    GrPathRenderer* getPathRenderer(const GrPathRenderer::CanDrawPathArgs& args,
+                                    DrawType drawType,
+                                    GrPathRenderer::StencilSupport* stencilSupport);
+
+private:
+    GrPathRendererChain();
+
+    // takes a ref and unrefs in destructor
+    GrPathRenderer* addPathRenderer(GrPathRenderer* pr);
+
+    void init();
+
+    enum {
+        kPreAllocCount = 8,
+    };
+    bool fInit;
+    GrContext*                                          fOwner;
+    SkSTArray<kPreAllocCount, GrPathRenderer*, true>    fChain;
+
+    typedef SkRefCnt INHERITED;
+};
+
+#endif