reed@android.com | 0db5a7f | 2009-11-09 16:01:36 +0000 | [diff] [blame^] | 1 | #include "SampleCode.h" |
| 2 | #include "SkView.h" |
| 3 | #include "SkCanvas.h" |
| 4 | #include "SkGradientShader.h" |
| 5 | #include "SkAvoidXfermode.h" |
| 6 | |
| 7 | /////////////////////////////////////////////////////////////////////////////// |
| 8 | |
| 9 | class AvoidView : public SkView { |
| 10 | SkShader* fShader; |
| 11 | |
| 12 | enum { |
| 13 | W = 480, |
| 14 | H = 320 |
| 15 | }; |
| 16 | public: |
| 17 | AvoidView() { |
| 18 | SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW, SK_ColorGREEN, SK_ColorCYAN, SK_ColorBLUE }; |
| 19 | |
| 20 | #if 0 |
| 21 | SkPoint pts[] = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) }; |
| 22 | fShader = SkGradientShader::CreateLinear(pts, colors, NULL, |
| 23 | SK_ARRAY_COUNT(colors), |
| 24 | SkShader::kMirror_TileMode); |
| 25 | #else |
| 26 | SkPoint pts[] = { SkIntToScalar(W)/2, SkIntToScalar(H)/2 }; |
| 27 | fShader = SkGradientShader::CreateRadial(pts[0], SkIntToScalar(H)/5, |
| 28 | colors, NULL, |
| 29 | SK_ARRAY_COUNT(colors), |
| 30 | SkShader::kMirror_TileMode); |
| 31 | #endif |
| 32 | } |
| 33 | |
| 34 | virtual ~AvoidView() { |
| 35 | fShader->unref(); |
| 36 | } |
| 37 | |
| 38 | protected: |
| 39 | virtual bool onQuery(SkEvent* evt) { |
| 40 | if (SampleCode::TitleQ(*evt)) { |
| 41 | SampleCode::TitleR(evt, "AvoidXfermode"); |
| 42 | return true; |
| 43 | } |
| 44 | return this->INHERITED::onQuery(evt); |
| 45 | } |
| 46 | |
| 47 | virtual void onDraw(SkCanvas* canvas) { |
| 48 | canvas->drawColor(SK_ColorWHITE); |
| 49 | |
| 50 | SkPaint paint; |
| 51 | SkRect r = { 0, 0, SkIntToScalar(W), SkIntToScalar(H) }; |
| 52 | |
| 53 | canvas->translate(r.width() / 6, r.height() / 6); |
| 54 | |
| 55 | paint.setShader(fShader); |
| 56 | canvas->drawRect(r, paint); |
| 57 | |
| 58 | static const struct { |
| 59 | int fTolerance; |
| 60 | SkAvoidXfermode::Mode fMode; |
| 61 | float fDX, fDY; |
| 62 | } gData[] = { |
| 63 | { 16, SkAvoidXfermode::kAvoidColor_Mode, 0, 0 }, |
| 64 | { 255-16, SkAvoidXfermode::kAvoidColor_Mode, 1, 0 }, |
| 65 | { 16, SkAvoidXfermode::kTargetColor_Mode, 0, 1 }, |
| 66 | { 255-16, SkAvoidXfermode::kTargetColor_Mode, 1, 1 }, |
| 67 | }; |
| 68 | |
| 69 | paint.setShader(NULL); |
| 70 | paint.setColor(SK_ColorMAGENTA); |
| 71 | |
| 72 | SkPaint frameP; |
| 73 | frameP.setStyle(SkPaint::kStroke_Style); |
| 74 | |
| 75 | for (size_t i = 0; i < SK_ARRAY_COUNT(gData); i++) { |
| 76 | SkAvoidXfermode mode(SK_ColorGREEN, gData[i].fTolerance, |
| 77 | gData[i].fMode); |
| 78 | paint.setXfermode(&mode); |
| 79 | int div = 3; |
| 80 | SkRect rr = { 0, 0, r.width()/div, r.height()/div }; |
| 81 | rr.offset(r.width()/4 - rr.width()/2, r.height()/4 - rr.height()/2); |
| 82 | rr.offset(r.width() * gData[i].fDX/2, r.height() * gData[i].fDY/2); |
| 83 | canvas->drawRect(rr, paint); |
| 84 | paint.setXfermode(NULL); |
| 85 | |
| 86 | canvas->drawRect(rr, frameP); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | private: |
| 91 | typedef SkView INHERITED; |
| 92 | }; |
| 93 | |
| 94 | ////////////////////////////////////////////////////////////////////////////// |
| 95 | |
| 96 | static SkView* MyFactory() { |
| 97 | return new AvoidView; |
| 98 | } |
| 99 | |
| 100 | static SkViewRegister reg(MyFactory); |
| 101 | |