grab from latest android

git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 142 insertions, 0 deletions

diff --git a/src/core/SkPathEffect.cpp b/src/core/SkPathEffect.cpp
new file mode 100644
index 0000000000..29058958e3
--- /dev/null
+++ b/src/core/SkPathEffect.cpp
@@ -0,0 +1,142 @@
+/* libs/graphics/sgl/SkPathEffect.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 "SkPathEffect.h"
+#include "SkPath.h"
+#include "SkBuffer.h"
+
+//////////////////////////////////////////////////////////////////////////////////
+
+SkPairPathEffect::SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1)
+    : fPE0(pe0), fPE1(pe1)
+{
+    SkASSERT(pe0);
+    SkASSERT(pe1);
+    fPE0->ref();
+    fPE1->ref();
+}
+
+SkPairPathEffect::~SkPairPathEffect()
+{
+    fPE0->unref();
+    fPE1->unref();
+}
+
+/*
+    Format: [oe0-factory][pe1-factory][pe0-size][pe0-data][pe1-data]
+*/
+void SkPairPathEffect::flatten(SkFlattenableWriteBuffer& buffer)
+{
+    buffer.writeFlattenable(fPE0);
+    buffer.writeFlattenable(fPE1);
+}
+
+SkPairPathEffect::SkPairPathEffect(SkFlattenableReadBuffer& buffer)
+{
+    fPE0 = (SkPathEffect*)buffer.readFlattenable();
+    fPE1 = (SkPathEffect*)buffer.readFlattenable();
+}
+
+//////////////////////////////////////////////////////////////////////////////////
+
+bool SkComposePathEffect::filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
+{
+    SkPath          tmp;
+    const SkPath*   ptr = &src;
+
+    if (fPE1->filterPath(&tmp, src, width))
+        ptr = &tmp;
+    return fPE0->filterPath(dst, *ptr, width);
+}
+
+//////////////////////////////////////////////////////////////////////////////////
+
+bool SkSumPathEffect::filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
+{
+    // use bit-or so that we always call both, even if the first one succeeds
+    return  fPE0->filterPath(dst, src, width) | fPE1->filterPath(dst, src, width);
+}
+
+/////////////////////////////////////////////////////////////////////////////////
+
+#include "SkStroke.h"
+
+SkStrokePathEffect::SkStrokePathEffect(const SkPaint& paint)
+    : fWidth(paint.getStrokeWidth()), fMiter(paint.getStrokeMiter()),
+      fStyle(SkToU8(paint.getStyle())), fJoin(SkToU8(paint.getStrokeJoin())), fCap(SkToU8(paint.getStrokeCap()))
+{
+}
+
+SkStrokePathEffect::SkStrokePathEffect(SkScalar width, SkPaint::Style style, SkPaint::Join join, SkPaint::Cap cap, SkScalar miter)
+    : fWidth(width), fMiter(miter), fStyle(SkToU8(style)), fJoin(SkToU8(join)), fCap(SkToU8(cap))
+{
+    if (miter < 0)  // signal they want the default
+        fMiter = SK_DefaultMiterLimit;
+}
+
+bool SkStrokePathEffect::filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
+{
+    if (fWidth < 0 || fStyle == SkPaint::kFill_Style)
+        return false;
+
+    if (fStyle == SkPaint::kStroke_Style && fWidth == 0)    // hairline
+    {
+        *width = 0;
+        return true;
+    }
+
+    SkStroke    stroke;
+
+    stroke.setWidth(fWidth);
+    stroke.setMiterLimit(fMiter);
+    stroke.setJoin((SkPaint::Join)fJoin);
+    stroke.setCap((SkPaint::Cap)fCap);
+    stroke.setDoFill(fStyle == SkPaint::kStrokeAndFill_Style);
+
+    stroke.strokePath(src, dst);
+    return true;
+}
+
+SkFlattenable::Factory SkStrokePathEffect::getFactory()
+{
+    return CreateProc;
+}
+
+SkFlattenable* SkStrokePathEffect::CreateProc(SkFlattenableReadBuffer& buffer)
+{
+    return SkNEW_ARGS(SkStrokePathEffect, (buffer));
+}
+
+void SkStrokePathEffect::flatten(SkFlattenableWriteBuffer& buffer)
+{
+    buffer.writeScalar(fWidth);
+    buffer.writeScalar(fMiter);
+    buffer.write8(fStyle);
+    buffer.write8(fJoin);
+    buffer.write8(fCap);
+}
+
+SkStrokePathEffect::SkStrokePathEffect(SkFlattenableReadBuffer& buffer)
+{
+    fWidth = buffer.readScalar();
+    fMiter = buffer.readScalar();
+    fStyle = buffer.readU8();
+    fJoin = buffer.readU8();
+    fCap = buffer.readU8();
+}
+
+