grab from latest android
git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/Sk2DPathEffect.cpp b/src/effects/Sk2DPathEffect.cpp
new file mode 100644
index 0000000..405b194
--- /dev/null
+++ b/src/effects/Sk2DPathEffect.cpp
@@ -0,0 +1,107 @@
+/* libs/graphics/effects/Sk2DPathEffect.cpp
+**
+** Copyright 2006, The Android Open Source Project
+**
+** 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.
+*/
+
+#include "Sk2DPathEffect.h"
+#include "SkBlitter.h"
+#include "SkPath.h"
+#include "SkScan.h"
+
+class Sk2DPathEffectBlitter : public SkBlitter {
+public:
+ Sk2DPathEffectBlitter(Sk2DPathEffect* pe, SkPath* dst)
+ : fPE(pe), fDst(dst)
+ {}
+ virtual void blitH(int x, int y, int count)
+ {
+ fPE->nextSpan(x, y, count, fDst);
+ }
+private:
+ Sk2DPathEffect* fPE;
+ SkPath* fDst;
+};
+
+////////////////////////////////////////////////////////////////////////////////////
+
+Sk2DPathEffect::Sk2DPathEffect(const SkMatrix& mat) : fMatrix(mat)
+{
+ mat.invert(&fInverse);
+}
+
+bool Sk2DPathEffect::filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
+{
+ Sk2DPathEffectBlitter blitter(this, dst);
+ SkPath tmp;
+ SkRect bounds;
+ SkIRect ir;
+
+ src.transform(fInverse, &tmp);
+ tmp.computeBounds(&bounds, SkPath::kExact_BoundsType);
+ bounds.round(&ir);
+ if (!ir.isEmpty()) {
+ // need to pass a clip to fillpath, required for inverse filltypes,
+ // even though those do not make sense for this patheffect
+ SkRegion clip(ir);
+
+ this->begin(ir, dst);
+ SkScan::FillPath(tmp, clip, &blitter);
+ this->end(dst);
+ }
+ return true;
+}
+
+void Sk2DPathEffect::nextSpan(int x, int y, int count, SkPath* path)
+{
+ const SkMatrix& mat = this->getMatrix();
+ SkPoint src, dst;
+
+ src.set(SkIntToScalar(x) + SK_ScalarHalf, SkIntToScalar(y) + SK_ScalarHalf);
+ do {
+ mat.mapPoints(&dst, &src, 1);
+ this->next(dst, x++, y, path);
+ src.fX += SK_Scalar1;
+ } while (--count > 0);
+}
+
+void Sk2DPathEffect::begin(const SkIRect& uvBounds, SkPath* dst) {}
+void Sk2DPathEffect::next(const SkPoint& loc, int u, int v, SkPath* dst) {}
+void Sk2DPathEffect::end(SkPath* dst) {}
+
+////////////////////////////////////////////////////////////////////////////////
+
+void Sk2DPathEffect::flatten(SkFlattenableWriteBuffer& buffer)
+{
+ buffer.writeMul4(&fMatrix, sizeof(fMatrix));
+}
+
+Sk2DPathEffect::Sk2DPathEffect(SkFlattenableReadBuffer& buffer)
+{
+ buffer.read(&fMatrix, sizeof(fMatrix));
+ fMatrix.invert(&fInverse);
+}
+
+SkFlattenable::Factory Sk2DPathEffect::getFactory()
+{
+ return CreateProc;
+}
+
+SkFlattenable* Sk2DPathEffect::CreateProc(SkFlattenableReadBuffer& buffer)
+{
+ return SkNEW_ARGS(Sk2DPathEffect, (buffer));
+}
+
+
+