| 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]));
|
| -}
|
| -
|
| -
|
|
|