| #include "SampleCode.h" |
| #include "SkView.h" |
| #include "SkCanvas.h" |
| #include "SkGradientShader.h" |
| #include "SkPath.h" |
| #include "SkRegion.h" |
| #include "SkShader.h" |
| #include "SkUtils.h" |
| #include "Sk1DPathEffect.h" |
| #include "SkCornerPathEffect.h" |
| #include "SkPathMeasure.h" |
| #include "SkRandom.h" |
| #include "SkColorPriv.h" |
| #include "SkPixelXorXfermode.h" |
| |
| static void test_grow(SkPath* path) |
| { |
| for (int i = 0; i < 100000; i++) |
| { |
| path->lineTo(i, i); |
| path->lineTo(i, i*2); |
| } |
| } |
| |
| #define CORNER_RADIUS 12 |
| static SkScalar gPhase; |
| |
| static const int gXY[] = { |
| 4, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4 |
| }; |
| |
| static SkPathEffect* make_pe(int flags) |
| { |
| if (flags == 1) |
| return new SkCornerPathEffect(SkIntToScalar(CORNER_RADIUS)); |
| |
| SkPath path; |
| path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1])); |
| for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2) |
| path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1])); |
| path.close(); |
| path.offset(SkIntToScalar(-6), 0); |
| |
| SkPathEffect* outer = new SkPath1DPathEffect(path, SkIntToScalar(12), gPhase, SkPath1DPathEffect::kRotate_Style); |
| |
| if (flags == 2) |
| return outer; |
| |
| SkPathEffect* inner = new SkCornerPathEffect(SkIntToScalar(CORNER_RADIUS)); |
| |
| SkPathEffect* pe = new SkComposePathEffect(outer, inner); |
| outer->unref(); |
| inner->unref(); |
| return pe; |
| } |
| |
| static SkPathEffect* make_warp_pe() |
| { |
| SkPath path; |
| path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1])); |
| for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2) |
| path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1])); |
| path.close(); |
| path.offset(SkIntToScalar(-6), 0); |
| |
| SkPathEffect* outer = new SkPath1DPathEffect(path, SkIntToScalar(12), gPhase, SkPath1DPathEffect::kMorph_Style); |
| SkPathEffect* inner = new SkCornerPathEffect(SkIntToScalar(CORNER_RADIUS)); |
| |
| SkPathEffect* pe = new SkComposePathEffect(outer, inner); |
| outer->unref(); |
| inner->unref(); |
| return pe; |
| } |
| |
| /////////////////////////////////////////////////////////// |
| |
| #include "SkColorFilter.h" |
| #include "SkPorterDuff.h" |
| #include "SkLayerRasterizer.h" |
| |
| class testrast : public SkLayerRasterizer { |
| public: |
| testrast() |
| { |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| #if 0 |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(SK_Scalar1*4); |
| this->addLayer(paint); |
| |
| paint.setStrokeWidth(SK_Scalar1*1); |
| paint.setPorterDuffXfermode(SkPorterDuff::kClear_Mode); |
| this->addLayer(paint); |
| #else |
| paint.setAlpha(0x66); |
| this->addLayer(paint, SkIntToScalar(4), SkIntToScalar(4)); |
| |
| paint.setAlpha(0xFF); |
| this->addLayer(paint); |
| #endif |
| } |
| }; |
| |
| class PathEffectView : public SkView { |
| SkPath fPath; |
| SkPoint fClickPt; |
| public: |
| PathEffectView() |
| { |
| SkRandom rand; |
| int steps = 20; |
| SkScalar dist = SkIntToScalar(500); |
| SkScalar x = SkIntToScalar(20); |
| SkScalar y = SkIntToScalar(50); |
| |
| fPath.moveTo(x, y); |
| for (int i = 0; i < steps; i++) |
| { |
| x += dist/steps; |
| fPath.lineTo(x, y + SkIntToScalar(rand.nextS() % 25)); |
| } |
| |
| fClickPt.set(SkIntToScalar(200), SkIntToScalar(200)); |
| } |
| |
| protected: |
| // overrides from SkEventSink |
| virtual bool onQuery(SkEvent* evt) |
| { |
| if (SampleCode::TitleQ(*evt)) |
| { |
| SampleCode::TitleR(evt, "PathEffects"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| void drawBG(SkCanvas* canvas) |
| { |
| canvas->drawColor(0xFFDDDDDD); |
| |
| #if 0 |
| SkPath path; |
| test_grow(&path); |
| SkPaint p; |
| |
| p.setAntiAlias(true); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setStrokeWidth(SK_Scalar1); |
| canvas->drawPath(path, p); |
| path.close(); |
| #endif |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) |
| { |
| this->drawBG(canvas); |
| |
| if (true) |
| { |
| canvas->drawColor(SK_ColorWHITE); |
| |
| SkPixelXorXfermode mode(SK_ColorWHITE); |
| SkPaint paint; |
| |
| paint.setColor(SK_ColorRED); |
| paint.setXfermode(&mode); |
| paint.setStrokeWidth(SkIntToScalar(8)); |
| |
| canvas->drawLine(SkIntToScalar(100), SkIntToScalar(100), |
| SkIntToScalar(200), SkIntToScalar(200), paint); |
| canvas->drawLine(SkIntToScalar(100), SkIntToScalar(200), |
| SkIntToScalar(200), SkIntToScalar(100), paint); |
| // return; |
| } |
| |
| if (false) |
| { |
| SkPath path; |
| SkPoint pts[] = { SkIntToScalar(100), SkIntToScalar(100), |
| SkIntToScalar(200), SkIntToScalar(100), |
| SkIntToScalar(100), SkIntToScalar(200) |
| }; |
| SkPaint paint; |
| |
| pts[2] = fClickPt; |
| |
| paint.setAntiAlias(true); |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(SkIntToScalar(5)); |
| |
| path.moveTo(pts[0]); |
| path.arcTo(pts[1], pts[2], SkIntToScalar(50)); |
| canvas->drawPath(path, paint); |
| |
| paint.setStrokeWidth(0); |
| paint.setColor(SK_ColorRED); |
| canvas->drawLine(pts[0].fX, pts[0].fY, pts[1].fX, pts[1].fY, paint); |
| canvas->drawLine(pts[1].fX, pts[1].fY, pts[2].fX, pts[2].fY, paint); |
| return; |
| } |
| |
| gPhase -= SK_Scalar1; |
| this->inval(nil); |
| |
| SkPaint paint; |
| |
| paint.setAntiAlias(true); |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(SkIntToScalar(5)); |
| canvas->drawPath(fPath, paint); |
| paint.setStrokeWidth(0); |
| |
| paint.setColor(SK_ColorRED); |
| paint.setPathEffect(make_pe(1))->unref(); |
| canvas->drawPath(fPath, paint); |
| |
| canvas->translate(0, SkIntToScalar(50)); |
| |
| paint.setColor(SK_ColorBLUE); |
| paint.setPathEffect(make_pe(2))->unref(); |
| canvas->drawPath(fPath, paint); |
| |
| canvas->translate(0, SkIntToScalar(50)); |
| |
| paint.setARGB(0xFF, 0, 0xBB, 0); |
| paint.setPathEffect(make_pe(3))->unref(); |
| canvas->drawPath(fPath, paint); |
| |
| canvas->translate(0, SkIntToScalar(50)); |
| |
| paint.setARGB(0xFF, 0, 0, 0); |
| paint.setPathEffect(make_warp_pe())->unref(); |
| paint.setRasterizer(new testrast)->unref(); |
| canvas->drawPath(fPath, paint); |
| |
| { |
| SkRect oval; |
| |
| oval.set(SkIntToScalar(50), SkIntToScalar(100), |
| SkIntToScalar(150), SkIntToScalar(150)); |
| canvas->drawRoundRect(oval, SkIntToScalar(8), SkIntToScalar(8), paint); |
| } |
| |
| { |
| SkRect bounds; |
| SkPaint paint; |
| |
| paint.setAntiAlias(true); |
| paint.setAlpha(0x80); |
| paint.setColorFilter( |
| SkColorFilter::CreatePorterDuffFilter( |
| SkColorSetARGB(0x44, 0, 0xFF, 0), SkPorterDuff::kSrcATop_Mode))->unref(); |
| |
| bounds.set(SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(150), SkIntToScalar(70)); |
| canvas->saveLayer(&bounds, &paint, |
| (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag)); |
| |
| paint.setColorFilter(NULL); |
| paint.setColor(SK_ColorRED); |
| canvas->drawOval(bounds, paint); |
| |
| paint.setColor(SK_ColorBLUE); |
| paint.setAlpha(0x80); |
| bounds.inset(SkIntToScalar(10), SkIntToScalar(10)); |
| canvas->drawOval(bounds, paint); |
| |
| canvas->restore(); |
| } |
| } |
| |
| private: |
| typedef SkView INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new PathEffectView; } |
| static SkViewRegister reg(MyFactory); |
| |