1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/pdf/SkPDFShader.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,73 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2011 Google Inc.
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkPDFShader_DEFINED
1.14 +#define SkPDFShader_DEFINED
1.15 +
1.16 +#include "SkPDFStream.h"
1.17 +#include "SkPDFTypes.h"
1.18 +#include "SkMatrix.h"
1.19 +#include "SkRefCnt.h"
1.20 +#include "SkShader.h"
1.21 +
1.22 +class SkObjRef;
1.23 +class SkPDFCatalog;
1.24 +
1.25 +/** \class SkPDFShader
1.26 +
1.27 + In PDF parlance, this is a pattern, used in place of a color when the
1.28 + pattern color space is selected.
1.29 +*/
1.30 +
1.31 +class SkPDFShader {
1.32 +public:
1.33 + /** Get the PDF shader for the passed SkShader. If the SkShader is
1.34 + * invalid in some way, returns NULL. The reference count of
1.35 + * the object is incremented and it is the caller's responsibility to
1.36 + * unreference it when done. This is needed to accommodate the weak
1.37 + * reference pattern used when the returned object is new and has no
1.38 + * other references.
1.39 + * @param shader The SkShader to emulate.
1.40 + * @param matrix The current transform. (PDF shaders are absolutely
1.41 + * positioned, relative to where the page is drawn.)
1.42 + * @param surfceBBox The bounding box of the drawing surface (with matrix
1.43 + * already applied).
1.44 + */
1.45 + static SkPDFObject* GetPDFShader(const SkShader& shader,
1.46 + const SkMatrix& matrix,
1.47 + const SkIRect& surfaceBBox);
1.48 +
1.49 +protected:
1.50 + class State;
1.51 +
1.52 + class ShaderCanonicalEntry {
1.53 + public:
1.54 + ShaderCanonicalEntry(SkPDFObject* pdfShader, const State* state);
1.55 + bool operator==(const ShaderCanonicalEntry& b) const;
1.56 +
1.57 + SkPDFObject* fPDFShader;
1.58 + const State* fState;
1.59 + };
1.60 + // This should be made a hash table if performance is a problem.
1.61 + static SkTDArray<ShaderCanonicalEntry>& CanonicalShaders();
1.62 + static SkBaseMutex& CanonicalShadersMutex();
1.63 +
1.64 + // This is an internal method.
1.65 + // CanonicalShadersMutex() should already be acquired.
1.66 + // This also takes ownership of shaderState.
1.67 + static SkPDFObject* GetPDFShaderByState(State* shaderState);
1.68 + static void RemoveShader(SkPDFObject* shader);
1.69 +
1.70 + SkPDFShader();
1.71 + virtual ~SkPDFShader() {};
1.72 +
1.73 + virtual bool isValid() = 0;
1.74 +};
1.75 +
1.76 +#endif
