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Unified Diff: skia/effects/Sk1DPathEffect.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/Sk1DPathEffect.cpp
===================================================================
--- skia/effects/Sk1DPathEffect.cpp (revision 16859)
+++ skia/effects/Sk1DPathEffect.cpp (working copy)
@@ -1,206 +0,0 @@
-/* libs/graphics/effects/Sk1DPathEffect.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 "Sk1DPathEffect.h"
-#include "SkPathMeasure.h"
-
-bool Sk1DPathEffect::filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
-{
- SkPathMeasure meas(src, false);
- do {
- SkScalar length = meas.getLength();
- SkScalar distance = this->begin(length);
- while (distance < length)
- {
- SkScalar delta = this->next(dst, distance, meas);
- if (delta <= 0)
- break;
- distance += delta;
- }
- } while (meas.nextContour());
- return true;
-}
-
-///////////////////////////////////////////////////////////////////////////////////////////
-
-SkPath1DPathEffect::SkPath1DPathEffect(const SkPath& path, SkScalar advance,
- SkScalar phase, Style style) : fPath(path)
-{
- if (advance <= 0 || path.isEmpty())
- {
- SkDEBUGF(("SkPath1DPathEffect can't use advance <= 0\n"));
- fAdvance = 0; // signals we can't draw anything
- }
- else
- {
- // cleanup their phase parameter, inverting it so that it becomes an
- // offset along the path (to match the interpretation in PostScript)
- if (phase < 0)
- {
- phase = -phase;
- if (phase > advance)
- phase = SkScalarMod(phase, advance);
- }
- else
- {
- if (phase > advance)
- phase = SkScalarMod(phase, advance);
- phase = advance - phase;
- }
- // now catch the edge case where phase == advance (within epsilon)
- if (phase >= advance)
- phase = 0;
- SkASSERT(phase >= 0);
-
- fAdvance = advance;
- fInitialOffset = phase;
-
- if ((unsigned)style >= kStyleCount) {
- SkDEBUGF(("SkPath1DPathEffect style enum out of range %d\n", style));
- }
- fStyle = style;
- }
-}
-
-bool SkPath1DPathEffect::filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
-{
- if (fAdvance > 0)
- {
- *width = -1;
- return this->INHERITED::filterPath(dst, src, width);
- }
- return false;
-}
-
-static void morphpoints(SkPoint dst[], const SkPoint src[], int count,
- SkPathMeasure& meas, SkScalar dist)
-{
- for (int i = 0; i < count; i++)
- {
- SkPoint pos;
- SkVector tangent;
-
- SkScalar sx = src[i].fX;
- SkScalar sy = src[i].fY;
-
- meas.getPosTan(dist + sx, &pos, &tangent);
-
- SkMatrix matrix;
- SkPoint pt;
-
- pt.set(sx, sy);
- matrix.setSinCos(tangent.fY, tangent.fX, 0, 0);
- matrix.preTranslate(-sx, 0);
- matrix.postTranslate(pos.fX, pos.fY);
- matrix.mapPoints(&dst[i], &pt, 1);
- }
-}
-
-/* TODO
-
-Need differentially more subdivisions when the follow-path is curvy. Not sure how to
-determine that, but we need it. I guess a cheap answer is let the caller tell us,
-but that seems like a cop-out. Another answer is to get Rob Johnson to figure it out.
-*/
-static void morphpath(SkPath* dst, const SkPath& src, SkPathMeasure& meas, SkScalar dist)
-{
- SkPath::Iter iter(src, false);
- SkPoint srcP[4], dstP[3];
- SkPath::Verb verb;
-
- while ((verb = iter.next(srcP)) != SkPath::kDone_Verb)
- {
- switch (verb) {
- case SkPath::kMove_Verb:
- morphpoints(dstP, srcP, 1, meas, dist);
- dst->moveTo(dstP[0]);
- break;
- case SkPath::kLine_Verb:
- srcP[2] = srcP[1];
- srcP[1].set(SkScalarAve(srcP[0].fX, srcP[2].fX),
- SkScalarAve(srcP[0].fY, srcP[2].fY));
- // fall through to quad
- case SkPath::kQuad_Verb:
- morphpoints(dstP, &srcP[1], 2, meas, dist);
- dst->quadTo(dstP[0], dstP[1]);
- break;
- case SkPath::kCubic_Verb:
- morphpoints(dstP, &srcP[1], 3, meas, dist);
- dst->cubicTo(dstP[0], dstP[1], dstP[2]);
- break;
- case SkPath::kClose_Verb:
- dst->close();
- break;
- default:
- SkASSERT(!"unknown verb");
- break;
- }
- }
-}
-
-SkPath1DPathEffect::SkPath1DPathEffect(SkFlattenableReadBuffer& buffer)
-{
- fAdvance = buffer.readScalar();
- if (fAdvance > 0) {
- fPath.unflatten(buffer);
- fInitialOffset = buffer.readScalar();
- fStyle = (Style) buffer.readU8();
- }
-}
-
-SkScalar SkPath1DPathEffect::begin(SkScalar contourLength)
-{
- return fInitialOffset;
-}
-
-void SkPath1DPathEffect::flatten(SkFlattenableWriteBuffer& buffer)
-{
- buffer.writeScalar(fAdvance);
- if (fAdvance > 0) {
- fPath.flatten(buffer);
- buffer.writeScalar(fInitialOffset);
- buffer.write8(fStyle);
- }
-}
-
-SkScalar SkPath1DPathEffect::next(SkPath* dst, SkScalar distance, SkPathMeasure& meas)
-{
- switch (fStyle) {
- case kTranslate_Style:
- {
- SkPoint pos;
- meas.getPosTan(distance, &pos, NULL);
- dst->addPath(fPath, pos.fX, pos.fY);
- }
- break;
- case kRotate_Style:
- {
- SkMatrix matrix;
- meas.getMatrix(distance, &matrix);
- dst->addPath(fPath, matrix);
- }
- break;
- case kMorph_Style:
- morphpath(dst, fPath, meas, distance);
- break;
- default:
- SkASSERT(!"unknown Style enum");
- break;
- }
- return fAdvance;
-}
-
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