| 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;
|
| -}
|
| -
|
|
|