PDF: Now threadsafe!

src/pdf/SkPDFShader.h

 
 /*
  * 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 SkPDFShader_DEFINED
 #define SkPDFShader_DEFINED
 
 #include "SkPDFResourceDict.h"
 #include "SkPDFStream.h"
 #include "SkPDFTypes.h"
 
+class SkPDFCanon;
 class SkMatrix;
 class SkShader;
 struct SkIRect;
 
 /** \class SkPDFShader
 
     In PDF parlance, this is a pattern, used in place of a color when the
     pattern color space is selected.
 */
 
 class SkPDFShader {
 public:
     class State;
 
     /** Get the PDF shader for the passed SkShader. If the SkShader is
      *  invalid in some way, returns NULL. The reference count of
      *  the object is incremented and it is the caller's responsibility to
      *  unreference it when done.  This is needed to accommodate the weak
      *  reference pattern used when the returned object is new and has no
      *  other references.
      *  @param shader      The SkShader to emulate.
      *  @param matrix      The current transform. (PDF shaders are absolutely
      *                     positioned, relative to where the page is drawn.)
      *  @param surfceBBox  The bounding box of the drawing surface (with matrix
      *                     already applied).
      *  @param rasterScale Additional scale to be applied for early
      *                     rasterization.
      */
-    static SkPDFObject* GetPDFShader(const SkShader& shader,
+    static SkPDFObject* GetPDFShader(SkPDFCanon* canon,
+                                     const SkShader& shader,
                                      const SkMatrix& matrix,
                                      const SkIRect& surfaceBBox,
                                      SkScalar rasterScale);
 };
 
 class SkPDFFunctionShader : public SkPDFDict {
     SK_DECLARE_INST_COUNT(SkPDFFunctionShader);
 
 public:
-    static SkPDFFunctionShader* Create(SkAutoTDelete<SkPDFShader::State>*);
+    static SkPDFFunctionShader* Create(SkPDFCanon*,
+                                       SkAutoTDelete<SkPDFShader::State>*);
     virtual ~SkPDFFunctionShader();
     bool equals(const SkPDFShader::State&) const;
 
 private:
+    SkPDFCanon* fCanon;
     SkAutoTDelete<const SkPDFShader::State> fShaderState;
     SkTDArray<SkPDFObject*> fResources;
-    explicit SkPDFFunctionShader(SkPDFShader::State* state);
+    SkPDFFunctionShader(SkPDFCanon*, SkPDFShader::State*);
     typedef SkPDFDict INHERITED;
 };
 
 /**
  * A shader for PDF gradients. This encapsulates the function shader
  * inside a tiling pattern while providing a common pattern interface.
  * The encapsulation allows the use of a SMask for transparency gradients.
  */
 class SkPDFAlphaFunctionShader : public SkPDFStream {
 public:
-    static SkPDFAlphaFunctionShader* Create(SkAutoTDelete<SkPDFShader::State>*);
+    static SkPDFAlphaFunctionShader* Create(SkPDFCanon*,
+                                            SkAutoTDelete<SkPDFShader::State>*);
     virtual ~SkPDFAlphaFunctionShader();
     bool equals(const SkPDFShader::State&) const;
 
 private:
+    SkPDFCanon* fCanon;
     SkAutoTDelete<const SkPDFShader::State> fShaderState;
     SkAutoTUnref<SkPDFObject> fColorShader;
     SkAutoTUnref<SkPDFResourceDict> fResourceDict;
-    explicit SkPDFAlphaFunctionShader(SkPDFShader::State* state);
+    SkPDFAlphaFunctionShader(SkPDFCanon*, SkPDFShader::State*);
 };
 
 class SkPDFImageShader : public SkPDFStream {
 public:
-    static SkPDFImageShader* Create(SkAutoTDelete<SkPDFShader::State>*);
+    static SkPDFImageShader* Create(SkPDFCanon*,
+                                    SkAutoTDelete<SkPDFShader::State>*);
     virtual ~SkPDFImageShader();
     bool equals(const SkPDFShader::State&) const;
 
 private:
+    SkPDFCanon* fCanon;
     SkAutoTDelete<const SkPDFShader::State> fShaderState;
     SkTSet<SkPDFObject*> fResources;
-    explicit SkPDFImageShader(SkPDFShader::State* state);
+    SkPDFImageShader(SkPDFCanon*, SkPDFShader::State*);
 };
 
 #endif