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| 1 /* | |
| 2 * Copyright 2013 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #include "gm.h" | |
| 9 #include "SkGradientShader.h" | |
| 10 #include "SkBitmapAlphaThresholdShader.h" | |
| 11 #include "SkTArray.h" | |
| 12 #include "SkParsePath.h" | |
| 13 | |
| 14 class BitmapAlphaThresholdGM : public skiagm::GM { | |
| 15 public: | |
| 16 BitmapAlphaThresholdGM() { | |
| 17 this->setBGColor(0xFF000000); | |
| 18 } | |
| 19 | |
| 20 private: | |
| 21 virtual uint32_t onGetFlags() const SK_OVERRIDE { | |
| 22 // narrow this flags when the shader has a CPU implementation and | |
| 23 // when it serializes. | |
| 24 return | |
| 25 kSkipPDF_Flag | | |
| 26 kSkipPicture_Flag | | |
| 27 kSkipPipe_Flag | | |
| 28 kSkipPipeCrossProcess_Flag | | |
| 29 kSkipTiled_Flag | | |
| 30 kSkip565_Flag | | |
| 31 kSkipScaledReplay_Flag | | |
| 32 kSkipPDFRasterization_Flag | | |
| 33 | |
| 34 kGPUOnly_Flag; | |
| 35 } | |
| 36 | |
| 37 virtual void onOnceBeforeDraw() SK_OVERRIDE { | |
| 38 fBM.setConfig(SkBitmap::kARGB_8888_Config, 100, 100); | |
| 39 if (!fBM.allocPixels()) { | |
| 40 return; | |
| 41 } | |
| 42 SkCanvas canvas(fBM); | |
| 43 SkPoint pts[] = { {0, 0}, {SkIntToScalar(fBM.width()), SkIntToScalar(fBM
.height())} }; | |
| 44 SkColor colors[] = {0x00000000, 0xffffffff}; | |
| 45 SkShader* grad = SkGradientShader::CreateLinear(pts, colors, NULL, 2, | |
| 46 SkShader::kClamp_TileMod
e); | |
| 47 SkPaint gradPaint; | |
| 48 gradPaint.setShader(grad)->unref(); | |
| 49 gradPaint.setXfermodeMode(SkXfermode::kSrc_Mode); | |
| 50 canvas.drawPaint(gradPaint); | |
| 51 | |
| 52 // Construct the region used as a mask. | |
| 53 SkRegion bmpBoundsClip; | |
| 54 bmpBoundsClip.setRect(0, 0, fBM.width(), fBM.height()); | |
| 55 SkPath circlePath; | |
| 56 SkScalar radius = SkScalarSqrt(SkIntToScalar(fBM.width() * fBM.height())
) / 2; | |
| 57 circlePath.addCircle(SkIntToScalar(fBM.width() / 2), | |
| 58 SkIntToScalar(fBM.height() / 2), | |
| 59 radius); | |
| 60 fMask.setPath(circlePath, bmpBoundsClip); | |
| 61 | |
| 62 SkPath batPath; | |
| 63 SkParsePath::FromSVGString( | |
| 64 "M305.214,374.779c2.463,0,3.45,0.493,3.45,0.493l1.478-6.241c0,0,1.15,4.7
63,1.643,9.034" | |
| 65 "c0.493,4.271,8.048,1.479,14.454,0.164c6.405-1.314,7.72-11.662,7.72-11.6
62h59.294c0,0-35.807,10.841-26.772,34.656" | |
| 66 "c0,0-52.889-8.048-61.101,24.967h-0.001c-8.212-33.015-61.101-24.967-61.1
01-24.967c9.034-23.815-26.772-34.656-26.772-34.656" | |
| 67 "h59.294c0,0,1.314,10.348,7.719,11.662c6.406,1.314,13.962,4.106,14.454-0
.164c0.493-4.271,1.643-9.034,1.643-9.034l1.479,6.241" | |
| 68 "c0,0,0.985-0.493,3.449-0.493H305.214L305.214,374.779z", | |
| 69 &batPath); | |
| 70 | |
| 71 SkMatrix matrix; | |
| 72 matrix.setTranslate(-208, -280); | |
| 73 matrix.postScale(radius / 100, radius / 100); | |
| 74 batPath.transform(matrix, &batPath); | |
| 75 SkRegion batRegion; | |
| 76 batRegion.setPath(batPath, bmpBoundsClip); | |
| 77 | |
| 78 fMask.op(batRegion, SkRegion::kDifference_Op); | |
| 79 } | |
| 80 | |
| 81 virtual SkString onShortName() SK_OVERRIDE { | |
| 82 return SkString("bat"); | |
| 83 } | |
| 84 | |
| 85 virtual SkISize onISize() SK_OVERRIDE { | |
| 86 return SkISize::Make(518, 735); | |
| 87 } | |
| 88 | |
| 89 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { | |
| 90 | |
| 91 SkTArray<SkMatrix> lms; | |
| 92 lms.push_back().reset(); | |
| 93 lms.push_back().setScale(SK_Scalar1 / 2, SK_Scalar1); | |
| 94 lms.push_back().setScale(SK_Scalar1, 2 * SK_Scalar1); | |
| 95 lms.push_back().setRotate(-SK_Scalar1 * 30); | |
| 96 lms.push_back().setSkew(0, SK_Scalar1 / 5); | |
| 97 | |
| 98 static const SkScalar kMargin = 5 * SK_Scalar1; | |
| 99 canvas->translate(kMargin, kMargin); | |
| 100 canvas->save(); | |
| 101 | |
| 102 static const U8CPU kThresholds[] = { 0x0, 0x08, 0x40, 0x80, 0xC0, 0xF0,
0xFF }; | |
| 103 | |
| 104 for (size_t i = 0; i < SK_ARRAY_COUNT(kThresholds); ++i) { | |
| 105 for (int j = 0; j < lms.count(); ++j) { | |
| 106 SkRect rect; | |
| 107 rect.fLeft = 0; | |
| 108 rect.fTop = 0; | |
| 109 rect.fRight = SkIntToScalar(fBM.width()); | |
| 110 rect.fBottom = SkIntToScalar(fBM.height()); | |
| 111 | |
| 112 SkShader* thresh; | |
| 113 // This SkShader currently only has a GPU implementation. | |
| 114 if (canvas->getDevice()->accessRenderTarget()) { | |
| 115 thresh = SkBitmapAlphaThresholdShader::Create(fBM, fMask, kT
hresholds[i]); | |
| 116 } else { | |
| 117 thresh = SkShader::CreateBitmapShader(fBM, SkShader::kClamp_
TileMode, | |
| 118 SkShader::kClamp_
TileMode); | |
| 119 } | |
| 120 | |
| 121 thresh->setLocalMatrix(lms[j]); | |
| 122 | |
| 123 SkPaint paint; | |
| 124 paint.setShader(thresh)->unref(); | |
| 125 | |
| 126 canvas->drawRect(rect, paint); | |
| 127 canvas->translate(SkIntToScalar(fBM.width() + kMargin), 0); | |
| 128 } | |
| 129 canvas->restore(); | |
| 130 canvas->translate(0, SkIntToScalar(fBM.height() + kMargin)); | |
| 131 canvas->save(); | |
| 132 } | |
| 133 | |
| 134 } | |
| 135 | |
| 136 SkBitmap fBM; | |
| 137 SkRegion fMask; | |
| 138 | |
| 139 typedef skiagm::GM INHERITED; | |
| 140 }; | |
| 141 | |
| 142 ////////////////////////////////////////////////////////////////////////////// | |
| 143 | |
| 144 DEF_GM( return new BitmapAlphaThresholdGM(); ) | |
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Chromium Code Reviews
Issue 108653012:
Remove SkBitmapAlphaThresholdShader (Closed)
Base URL: https://skia.googlesource.com/skia.git@master