| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #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 "SkColorPriv.h" |
| #include "SkColorFilter.h" |
| #include "SkTypeface.h" |
| #include "SkAvoidXfermode.h" |
| |
| static inline SkPMColor rgb2gray(SkPMColor c) |
| { |
| unsigned r = SkGetPackedR32(c); |
| unsigned g = SkGetPackedG32(c); |
| unsigned b = SkGetPackedB32(c); |
| |
| unsigned x = (r * 5 + g * 7 + b * 4) >> 4; |
| |
| return SkPackARGB32(0, x, x, x) | (c & (SK_A32_MASK << SK_A32_SHIFT)); |
| } |
| |
| class SkGrayScaleColorFilter : public SkColorFilter { |
| public: |
| virtual void filterSpan(const SkPMColor src[], int count, SkPMColor result[]) |
| { |
| for (int i = 0; i < count; i++) |
| result[i] = rgb2gray(src[i]); |
| } |
| }; |
| |
| class SkChannelMaskColorFilter : public SkColorFilter { |
| public: |
| SkChannelMaskColorFilter(U8CPU redMask, U8CPU greenMask, U8CPU blueMask) |
| { |
| fMask = SkPackARGB32(0xFF, redMask, greenMask, blueMask); |
| } |
| |
| virtual void filterSpan(const SkPMColor src[], int count, SkPMColor result[]) |
| { |
| SkPMColor mask = fMask; |
| for (int i = 0; i < count; i++) |
| result[i] = src[i] & mask; |
| } |
| |
| private: |
| SkPMColor fMask; |
| }; |
| |
| /////////////////////////////////////////////////////////// |
| |
| #include "SkGradientShader.h" |
| #include "SkLayerRasterizer.h" |
| #include "SkBlurMaskFilter.h" |
| |
| #include "Sk2DPathEffect.h" |
| |
| class Dot2DPathEffect : public Sk2DPathEffect { |
| public: |
| Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix, |
| SkTDArray<SkPoint>* pts) |
| : Sk2DPathEffect(matrix), fRadius(radius), fPts(pts) {} |
| |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Dot2DPathEffect) |
| |
| protected: |
| virtual void begin(const SkIRect& uvBounds, SkPath* dst) { |
| if (fPts) { |
| fPts->reset(); |
| } |
| this->INHERITED::begin(uvBounds, dst); |
| } |
| // virtual void end(SkPath* dst) {} |
| virtual void next(const SkPoint& loc, int u, int v, SkPath* dst) |
| { |
| if (fPts) { |
| *fPts->append() = loc; |
| } |
| dst->addCircle(loc.fX, loc.fY, fRadius); |
| } |
| |
| Dot2DPathEffect(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) |
| { |
| fRadius = buffer.readScalar(); |
| fPts = NULL; |
| } |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE { |
| this->INHERITED::flatten(buffer); |
| buffer.writeScalar(fRadius); |
| } |
| |
| private: |
| SkScalar fRadius; |
| SkTDArray<SkPoint>* fPts; |
| |
| typedef Sk2DPathEffect INHERITED; |
| }; |
| |
| class InverseFillPE : public SkPathEffect { |
| public: |
| InverseFillPE() {} |
| virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width) { |
| *dst = src; |
| dst->setFillType(SkPath::kInverseWinding_FillType); |
| return true; |
| } |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(InverseFillPE) |
| |
| protected: |
| InverseFillPE(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {} |
| private: |
| |
| typedef SkPathEffect INHERITED; |
| }; |
| |
| static SkPathEffect* makepe(float interp, SkTDArray<SkPoint>* pts) { |
| SkMatrix lattice; |
| SkScalar rad = 3 + SkIntToScalar(4) * (1 - interp); |
| lattice.setScale(rad*2, rad*2, 0, 0); |
| lattice.postSkew(SK_Scalar1/3, 0, 0, 0); |
| return new Dot2DPathEffect(rad, lattice, pts); |
| } |
| |
| static void r7(SkLayerRasterizer* rast, SkPaint& p, SkScalar interp) { |
| p.setPathEffect(makepe(interp, NULL))->unref(); |
| rast->addLayer(p); |
| #if 0 |
| p.setPathEffect(new InverseFillPE())->unref(); |
| p.setXfermodeMode(SkXfermode::kSrcIn_Mode); |
| p.setXfermodeMode(SkXfermode::kClear_Mode); |
| p.setAlpha((1 - interp) * 255); |
| rast->addLayer(p); |
| #endif |
| } |
| |
| typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&); |
| |
| #include "SkXfermode.h" |
| |
| static void apply_shader(SkPaint* paint, float scale) |
| { |
| SkPaint p; |
| SkLayerRasterizer* rast = new SkLayerRasterizer; |
| |
| p.setAntiAlias(true); |
| r7(rast, p, scale); |
| paint->setRasterizer(rast)->unref(); |
| |
| paint->setColor(SK_ColorBLUE); |
| } |
| |
| class ClockFaceView : public SkView { |
| SkTypeface* fFace; |
| SkScalar fInterp; |
| SkScalar fDx; |
| public: |
| ClockFaceView() |
| { |
| fFace = SkTypeface::CreateFromFile("/Users/reed/Downloads/p052024l.pfb"); |
| fInterp = 0; |
| fDx = SK_Scalar1/64; |
| } |
| |
| virtual ~ClockFaceView() |
| { |
| SkSafeUnref(fFace); |
| } |
| |
| protected: |
| // overrides from SkEventSink |
| virtual bool onQuery(SkEvent* evt) |
| { |
| if (SampleCode::TitleQ(*evt)) |
| { |
| SampleCode::TitleR(evt, "Text Effects"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| void drawBG(SkCanvas* canvas) |
| { |
| // canvas->drawColor(0xFFDDDDDD); |
| canvas->drawColor(SK_ColorWHITE); |
| } |
| |
| static void drawdots(SkCanvas* canvas, const SkPaint& orig) { |
| SkTDArray<SkPoint> pts; |
| SkPathEffect* pe = makepe(0, &pts); |
| |
| SkScalar width = -1; |
| SkPath path, dstPath; |
| orig.getTextPath("9", 1, 0, 0, &path); |
| pe->filterPath(&dstPath, path, &width); |
| |
| SkPaint p; |
| p.setAntiAlias(true); |
| p.setStrokeWidth(10); |
| p.setColor(SK_ColorRED); |
| canvas->drawPoints(SkCanvas::kPoints_PointMode, pts.count(), pts.begin(), |
| p); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| this->drawBG(canvas); |
| |
| SkScalar x = SkIntToScalar(20); |
| SkScalar y = SkIntToScalar(300); |
| SkPaint paint; |
| |
| paint.setAntiAlias(true); |
| paint.setTextSize(SkIntToScalar(240)); |
| paint.setTypeface(SkTypeface::CreateFromName("sans-serif", |
| SkTypeface::kBold)); |
| |
| SkString str("9"); |
| |
| paint.setTypeface(fFace); |
| |
| apply_shader(&paint, fInterp); |
| canvas->drawText(str.c_str(), str.size(), x, y, paint); |
| |
| // drawdots(canvas, paint); |
| |
| if (false) { |
| fInterp += fDx; |
| if (fInterp > 1) { |
| fInterp = 1; |
| fDx = -fDx; |
| } else if (fInterp < 0) { |
| fInterp = 0; |
| fDx = -fDx; |
| } |
| this->inval(NULL); |
| } |
| } |
| |
| private: |
| typedef SkView INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new ClockFaceView; } |
| static SkViewRegister reg(MyFactory); |
| |