1 files changed, 145 insertions, 0 deletions
diff --git a/skia/include/SkPathEffect.h b/skia/include/SkPathEffect.h
new file mode 100644
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+++ b/skia/include/SkPathEffect.h
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+/* include/graphics/SkPathEffect.h
+**
+** Copyright 2006, Google Inc.
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#ifndef SkPathEffect_DEFINED
+#define SkPathEffect_DEFINED
+
+#include "SkFlattenable.h"
+
+class SkPath;
+
+/** \class SkPathEffect
+
+    SkPathEffect is the base class for objects in the SkPaint that affect
+    the geometry of a drawing primitive before it is transformed by the
+    canvas' matrix and drawn.
+
+    Dashing is implemented as a subclass of SkPathEffect.
+*/
+class SkPathEffect : public SkFlattenable {
+public:
+    //  This method is not exported to java.
+    SkPathEffect() {}
+
+    /** Given a src path and a width value, return true if the patheffect
+        has produced a new path (dst) and a new width value. If false is returned,
+        ignore dst and width.
+        On input, width >= 0 means the src should be stroked
+        On output, width >= 0 means the dst should be stroked
+    */
+    virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width) = 0;
+
+private:
+    // illegal
+    SkPathEffect(const SkPathEffect&);
+    SkPathEffect& operator=(const SkPathEffect&);
+};
+
+/** \class SkPairPathEffect
+
+    Common baseclass for Compose and Sum. This subclass manages two pathEffects,
+    including flattening them. It does nothing in filterPath, and is only useful
+    for managing the lifetimes of its two arguments.
+*/
+class SkPairPathEffect : public SkPathEffect {
+public:
+    SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1);
+    virtual ~SkPairPathEffect();
+
+protected:
+    SkPairPathEffect(SkFlattenableReadBuffer&);
+    virtual void flatten(SkFlattenableWriteBuffer&);
+    // these are visible to our subclasses
+    SkPathEffect* fPE0, *fPE1;
+    
+private:
+    typedef SkPathEffect INHERITED;
+};
+
+/** \class SkComposePathEffect
+
+    This subclass of SkPathEffect composes its two arguments, to create
+    a compound pathEffect.
+*/
+class SkComposePathEffect : public SkPairPathEffect {
+public:
+    /** Construct a pathEffect whose effect is to apply first the inner pathEffect
+        and the the outer pathEffect (e.g. outer(inner(path)))
+        The reference counts for outer and inner are both incremented in the constructor,
+        and decremented in the destructor.
+    */
+    SkComposePathEffect(SkPathEffect* outer, SkPathEffect* inner)
+        : INHERITED(outer, inner) {}
+
+    // overrides
+    
+    //  This method is not exported to java.
+    virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width);
+
+protected:
+    virtual Factory getFactory() { return CreateProc; }
+
+private:
+    static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
+        return SkNEW_ARGS(SkComposePathEffect, (buffer));
+    }
+    SkComposePathEffect(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {}
+
+    // illegal
+    SkComposePathEffect(const SkComposePathEffect&);
+    SkComposePathEffect& operator=(const SkComposePathEffect&);
+    
+    typedef SkPairPathEffect INHERITED;
+};
+
+/** \class SkSumPathEffect
+
+    This subclass of SkPathEffect applies two pathEffects, one after the other.
+    Its filterPath() returns true if either of the effects succeeded.
+*/
+class SkSumPathEffect : public SkPairPathEffect {
+public:
+    /** Construct a pathEffect whose effect is to apply two effects, in sequence.
+        (e.g. first(path) + second(path))
+        The reference counts for first and second are both incremented in the constructor,
+        and decremented in the destructor.
+    */
+    SkSumPathEffect(SkPathEffect* first, SkPathEffect* second)
+        : INHERITED(first, second) {}
+
+    // overrides
+    //  This method is not exported to java.
+    virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width);
+
+protected:
+    virtual Factory getFactory() { return CreateProc; }
+
+private:
+    static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer)  {
+        return SkNEW_ARGS(SkSumPathEffect, (buffer));
+    }
+    SkSumPathEffect(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {}
+
+    // illegal
+    SkSumPathEffect(const SkSumPathEffect&);
+    SkSumPathEffect& operator=(const SkSumPathEffect&);
+
+    typedef SkPairPathEffect INHERITED;
+};
+
+#endif
+