reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | #include "SampleCode.h" |
| 2 | #include "SkView.h" |
| 3 | #include "SkCanvas.h" |
| 4 | #include "SkGradientShader.h" |
| 5 | #include "SkGraphics.h" |
| 6 | #include "SkImageDecoder.h" |
| 7 | #include "SkPath.h" |
| 8 | #include "SkPorterDuff.h" |
| 9 | #include "SkRegion.h" |
| 10 | #include "SkShader.h" |
| 11 | #include "SkUtils.h" |
| 12 | #include "SkXfermode.h" |
| 13 | #include "SkShaderExtras.h" |
| 14 | #include "SkColorPriv.h" |
| 15 | #include "SkColorFilter.h" |
| 16 | #include "SkTime.h" |
| 17 | #include "SkTransparentShader.h" |
| 18 | #include "SkTypeface.h" |
| 19 | |
| 20 | static SkShader* make_bitmapfade(const SkBitmap& bm) |
| 21 | { |
| 22 | SkPoint pts[2]; |
| 23 | SkColor colors[2]; |
| 24 | |
| 25 | pts[0].set(0, 0); |
| 26 | pts[1].set(0, SkIntToScalar(bm.height())); |
| 27 | colors[0] = SK_ColorBLACK; |
| 28 | colors[1] = SkColorSetARGB(0, 0, 0, 0); |
| 29 | SkShader* shaderA = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode); |
| 30 | |
| 31 | SkShader* shaderB = SkShader::CreateBitmapShader(bm, |
| 32 | SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); |
| 33 | |
| 34 | SkXfermode* mode = SkPorterDuff::CreateXfermode(SkPorterDuff::kDstIn_Mode); |
| 35 | |
| 36 | SkShader* shader = new SkComposeShader(shaderB, shaderA, mode); |
| 37 | shaderA->unref(); |
| 38 | shaderB->unref(); |
| 39 | mode->unref(); |
| 40 | |
| 41 | return shader; |
| 42 | } |
| 43 | |
| 44 | class ShaderView : public SkView { |
| 45 | public: |
| 46 | SkShader* fShader; |
| 47 | SkBitmap fBitmap; |
| 48 | |
| 49 | ShaderView() |
| 50 | { |
| 51 | SkImageDecoder::DecodeFile("/cover.png", &fBitmap); |
| 52 | |
| 53 | SkPoint pts[2]; |
| 54 | SkColor colors[2]; |
| 55 | |
| 56 | pts[0].set(0, 0); |
| 57 | pts[1].set(SkIntToScalar(100), 0); |
| 58 | colors[0] = SK_ColorRED; |
| 59 | colors[1] = SK_ColorBLUE; |
| 60 | SkShader* shaderA = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode); |
| 61 | |
| 62 | pts[0].set(0, 0); |
| 63 | pts[1].set(0, SkIntToScalar(100)); |
| 64 | colors[0] = SK_ColorBLACK; |
| 65 | colors[1] = SkColorSetARGB(0x80, 0, 0, 0); |
| 66 | SkShader* shaderB = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode); |
| 67 | |
| 68 | SkXfermode* mode = SkPorterDuff::CreateXfermode(SkPorterDuff::kDstIn_Mode); |
| 69 | |
| 70 | fShader = new SkComposeShader(shaderA, shaderB, mode); |
| 71 | shaderA->unref(); |
| 72 | shaderB->unref(); |
| 73 | mode->unref(); |
| 74 | } |
| 75 | virtual ~ShaderView() |
| 76 | { |
| 77 | fShader->safeUnref(); |
| 78 | } |
| 79 | |
| 80 | protected: |
| 81 | // overrides from SkEventSink |
| 82 | virtual bool onQuery(SkEvent* evt) |
| 83 | { |
| 84 | if (SampleCode::TitleQ(*evt)) |
| 85 | { |
| 86 | SampleCode::TitleR(evt, "Shaders"); |
| 87 | return true; |
| 88 | } |
| 89 | return this->INHERITED::onQuery(evt); |
| 90 | } |
| 91 | |
| 92 | void drawBG(SkCanvas* canvas) |
| 93 | { |
| 94 | // canvas->drawColor(0xFFDDDDDD); |
| 95 | canvas->drawColor(SK_ColorWHITE); |
| 96 | } |
| 97 | |
| 98 | virtual void onDraw(SkCanvas* canvas) |
| 99 | { |
| 100 | this->drawBG(canvas); |
| 101 | |
| 102 | canvas->drawBitmap(fBitmap, 0, 0); |
| 103 | |
| 104 | { |
| 105 | SkIRect src; |
| 106 | SkRect dst; |
| 107 | |
| 108 | src.set(20, 50, 120, 70); |
| 109 | dst.set(src); |
| 110 | dst.offset(SkIntToScalar(300), 0); |
| 111 | |
| 112 | canvas->drawBitmapRect(fBitmap, &src, dst); |
| 113 | } |
| 114 | |
| 115 | canvas->translate(SkIntToScalar(80), SkIntToScalar(80)); |
| 116 | |
| 117 | SkPaint paint; |
| 118 | SkRect r; |
| 119 | |
| 120 | paint.setColor(SK_ColorGREEN); |
| 121 | canvas->drawRectCoords(0, 0, SkIntToScalar(100), SkIntToScalar(100), paint); |
| 122 | paint.setShader(fShader); |
| 123 | canvas->drawRectCoords(0, 0, SkIntToScalar(100), SkIntToScalar(100), paint); |
| 124 | |
| 125 | canvas->translate(SkIntToScalar(110), 0); |
| 126 | |
| 127 | r.set(0, 0, SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())); |
| 128 | |
| 129 | paint.setShader(NULL); |
| 130 | canvas->drawRect(r, paint); |
| 131 | paint.setShader(make_bitmapfade(fBitmap))->unref(); |
| 132 | canvas->drawRect(r, paint); |
| 133 | |
| 134 | paint.setShader(new SkTransparentShader)->unref(); |
| 135 | canvas->drawRect(r, paint); |
| 136 | } |
| 137 | |
| 138 | virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) |
| 139 | { |
| 140 | this->inval(NULL); |
| 141 | return this->INHERITED::onFindClickHandler(x, y); |
| 142 | } |
| 143 | |
| 144 | virtual bool onClick(Click* click) |
| 145 | { |
| 146 | return this->INHERITED::onClick(click); |
| 147 | } |
| 148 | |
| 149 | private: |
| 150 | typedef SkView INHERITED; |
| 151 | }; |
| 152 | |
| 153 | ////////////////////////////////////////////////////////////////////////////// |
| 154 | |
| 155 | static SkView* MyFactory() { return new ShaderView; } |
| 156 | static SkViewRegister reg(MyFactory); |
| 157 | |