1#include "SampleCode.h" 2#include "SkBlurMaskFilter.h" 3#include "SkColorPriv.h" 4#include "SkGradientShader.h" 5#include "SkView.h" 6#include "SkCanvas.h" 7#include "SkUtils.h" 8 9static SkBitmap make_bitmap() { 10 SkBitmap bm; 11 SkColorTable* ctable = new SkColorTable(256); 12 13 SkPMColor* c = ctable->lockColors(); 14 for (int i = 0; i < 256; i++) { 15 c[i] = SkPackARGB32(255 - i, 0, 0, 0); 16 } 17 ctable->unlockColors(true); 18 bm.setConfig(SkBitmap::kIndex8_Config, 256, 256); 19 bm.allocPixels(ctable); 20 ctable->unref(); 21 22 bm.lockPixels(); 23 const float cx = bm.width() * 0.5f; 24 const float cy = bm.height() * 0.5f; 25 for (int y = 0; y < bm.height(); y++) { 26 float dy = y - cy; 27 dy *= dy; 28 uint8_t* p = bm.getAddr8(0, y); 29 for (int x = 0; x < 256; x++) { 30 float dx = x - cx; 31 dx *= dx; 32 float d = (dx + dy) / (cx/2); 33 int id = (int)d; 34 if (id > 255) { 35 id = 255; 36 } 37 p[x] = id; 38 } 39 } 40 bm.unlockPixels(); 41 return bm; 42} 43 44class BlurView : public SkView { 45 SkBitmap fBM; 46public: 47 BlurView() { 48 } 49 50protected: 51 // overrides from SkEventSink 52 virtual bool onQuery(SkEvent* evt) { 53 if (SampleCode::TitleQ(*evt)) { 54 SampleCode::TitleR(evt, "Blur"); 55 return true; 56 } 57 return this->INHERITED::onQuery(evt); 58 } 59 60 void drawBG(SkCanvas* canvas) { 61 canvas->drawColor(0xFFDDDDDD); 62 } 63 64 virtual void onDraw(SkCanvas* canvas) { 65 drawBG(canvas); 66 67 SkBlurMaskFilter::BlurStyle NONE = SkBlurMaskFilter::BlurStyle(-999); 68 static const struct { 69 SkBlurMaskFilter::BlurStyle fStyle; 70 int fCx, fCy; 71 } gRecs[] = { 72 { NONE, 0, 0 }, 73 { SkBlurMaskFilter::kInner_BlurStyle, -1, 0 }, 74 { SkBlurMaskFilter::kNormal_BlurStyle, 0, 1 }, 75 { SkBlurMaskFilter::kSolid_BlurStyle, 0, -1 }, 76 { SkBlurMaskFilter::kOuter_BlurStyle, 1, 0 }, 77 }; 78 79 SkPaint paint; 80 paint.setAntiAlias(true); 81 paint.setTextSize(25); 82 canvas->translate(-40, 0); 83 84 SkBlurMaskFilter::BlurFlags flags = SkBlurMaskFilter::kNone_BlurFlag; 85 for (int j = 0; j < 2; j++) { 86 canvas->save(); 87 paint.setColor(SK_ColorBLUE); 88 for (size_t i = 0; i < SK_ARRAY_COUNT(gRecs); i++) { 89 if (gRecs[i].fStyle != NONE) { 90 SkMaskFilter* mf = SkBlurMaskFilter::Create(20, 91 gRecs[i].fStyle, 92 flags); 93 paint.setMaskFilter(mf)->unref(); 94 } else { 95 paint.setMaskFilter(NULL); 96 } 97 canvas->drawCircle(200 + gRecs[i].fCx*100.f, 98 200 + gRecs[i].fCy*100.f, 50, paint); 99 } 100 // draw text 101 { 102 SkMaskFilter* mf = SkBlurMaskFilter::Create(4, 103 SkBlurMaskFilter::kNormal_BlurStyle, 104 flags); 105 paint.setMaskFilter(mf)->unref(); 106 SkScalar x = SkIntToScalar(70); 107 SkScalar y = SkIntToScalar(400); 108 paint.setColor(SK_ColorBLACK); 109 canvas->drawText("Hamburgefons Style", 18, x, y, paint); 110 canvas->drawText("Hamburgefons Style", 18, x, y + SkIntToScalar(50), paint); 111 paint.setMaskFilter(NULL); 112 paint.setColor(SK_ColorWHITE); 113 x -= SkIntToScalar(2); 114 y -= SkIntToScalar(2); 115 canvas->drawText("Hamburgefons Style", 18, x, y, paint); 116 } 117 canvas->restore(); 118 flags = SkBlurMaskFilter::kHighQuality_BlurFlag; 119 canvas->translate(350, 0); 120 } 121 } 122 123private: 124 typedef SkView INHERITED; 125}; 126 127////////////////////////////////////////////////////////////////////////////// 128 129static SkView* MyFactory() { return new BlurView; } 130static SkViewRegister reg(MyFactory); 131 132