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Unified Diff: skia/effects/SkDashPathEffect.cpp

Issue 113827: Remove the remainder of the skia source code from the Chromium repo.... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 11 years, 7 months ago
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Index: skia/effects/SkDashPathEffect.cpp
===================================================================
--- skia/effects/SkDashPathEffect.cpp (revision 16859)
+++ skia/effects/SkDashPathEffect.cpp (working copy)
@@ -1,178 +0,0 @@
-/* libs/graphics/effects/SkDashPathEffect.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 "SkDashPathEffect.h"
-#include "SkBuffer.h"
-#include "SkPathMeasure.h"
-
-static inline int is_even(int x)
-{
- return (~x) << 31;
-}
-
-static SkScalar FindFirstInterval(const SkScalar intervals[], SkScalar phase, int32_t* index)
-{
- int i;
-
- for (i = 0; phase > intervals[i]; i++)
- phase -= intervals[i];
- *index = i;
- return intervals[i] - phase;
-}
-
-SkDashPathEffect::SkDashPathEffect(const SkScalar intervals[], int count, SkScalar phase, bool scaleToFit)
- : fScaleToFit(scaleToFit)
-{
- SkASSERT(intervals);
- SkASSERT(count > 1 && SkAlign2(count) == count);
-
- fIntervals = (SkScalar*)sk_malloc_throw(sizeof(SkScalar) * count);
- fCount = count;
-
- SkScalar len = 0;
- for (int i = 0; i < count; i++)
- {
- SkASSERT(intervals[i] >= 0);
- fIntervals[i] = intervals[i];
- len += intervals[i];
- }
- fIntervalLength = len;
-
- if (len > 0) // we don't handle 0 length dash arrays
- {
- if (phase < 0)
- {
- phase = -phase;
- if (phase > len)
- phase = SkScalarMod(phase, len);
- phase = len - phase;
- }
- else if (phase >= len)
- phase = SkScalarMod(phase, len);
-
- SkASSERT(phase >= 0 && phase < len);
- fInitialDashLength = FindFirstInterval(intervals, phase, &fInitialDashIndex);
-
- SkASSERT(fInitialDashLength >= 0);
- SkASSERT(fInitialDashIndex >= 0 && fInitialDashIndex < fCount);
- }
- else
- fInitialDashLength = -1; // signal bad dash intervals
-}
-
-SkDashPathEffect::~SkDashPathEffect()
-{
- sk_free(fIntervals);
-}
-
-bool SkDashPathEffect::filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
-{
- // we do nothing if the src wants to be filled, or if our dashlength is 0
- if (*width < 0 || fInitialDashLength < 0)
- return false;
-
- SkPathMeasure meas(src, false);
- const SkScalar* intervals = fIntervals;
-
- do {
- bool skipFirstSegment = meas.isClosed();
- bool addedSegment = false;
- SkScalar length = meas.getLength();
- int index = fInitialDashIndex;
- SkScalar scale = SK_Scalar1;
-
- if (fScaleToFit)
- {
- if (fIntervalLength >= length)
- scale = SkScalarDiv(length, fIntervalLength);
- else
- {
- SkScalar div = SkScalarDiv(length, fIntervalLength);
- int n = SkScalarFloor(div);
- scale = SkScalarDiv(length, n * fIntervalLength);
- }
- }
-
- SkScalar distance = 0;
- SkScalar dlen = SkScalarMul(fInitialDashLength, scale);
-
- while (distance < length)
- {
- SkASSERT(dlen >= 0);
- addedSegment = false;
- if (is_even(index) && dlen > 0 && !skipFirstSegment)
- {
- addedSegment = true;
- meas.getSegment(distance, distance + dlen, dst, true);
- }
- distance += dlen;
-
- // clear this so we only respect it the first time around
- skipFirstSegment = false;
-
- // wrap around our intervals array if necessary
- index += 1;
- SkASSERT(index <= fCount);
- if (index == fCount)
- index = 0;
-
- // fetch our next dlen
- dlen = SkScalarMul(intervals[index], scale);
- }
-
- // extend if we ended on a segment and we need to join up with the (skipped) initial segment
- if (meas.isClosed() && is_even(fInitialDashIndex) && fInitialDashLength > 0)
- meas.getSegment(0, SkScalarMul(fInitialDashLength, scale), dst, !addedSegment);
- } while (meas.nextContour());
- return true;
-}
-
-SkFlattenable::Factory SkDashPathEffect::getFactory()
-{
- return fInitialDashLength < 0 ? NULL : CreateProc;
-}
-
-void SkDashPathEffect::flatten(SkFlattenableWriteBuffer& buffer)
-{
- SkASSERT(fInitialDashLength >= 0);
-
- buffer.write32(fCount);
- buffer.write32(fInitialDashIndex);
- buffer.writeScalar(fInitialDashLength);
- buffer.writeScalar(fIntervalLength);
- buffer.write32(fScaleToFit);
- buffer.writeMul4(fIntervals, fCount * sizeof(fIntervals[0]));
-}
-
-SkFlattenable* SkDashPathEffect::CreateProc(SkFlattenableReadBuffer& buffer)
-{
- return SkNEW_ARGS(SkDashPathEffect, (buffer));
-}
-
-SkDashPathEffect::SkDashPathEffect(SkFlattenableReadBuffer& buffer)
-{
- fCount = buffer.readS32();
- fInitialDashIndex = buffer.readS32();
- fInitialDashLength = buffer.readScalar();
- fIntervalLength = buffer.readScalar();
- fScaleToFit = (buffer.readS32() != 0);
-
- fIntervals = (SkScalar*)sk_malloc_throw(sizeof(SkScalar) * fCount);
- buffer.read(fIntervals, fCount * sizeof(fIntervals[0]));
-}
-
-
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