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| 1 |
| 2 /* |
| 3 * Copyright 2013 Google Inc. |
| 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. |
| 7 */ |
| 8 |
| 9 #include "gm.h" |
| 10 #include "SkBlurMask.h" |
| 11 #include "SkBlurMaskFilter.h" |
| 12 |
| 13 namespace skiagm { |
| 14 |
| 15 // This GM exercises the blurred rect nine-patching special cases when the |
| 16 // blurred rect is very large and/or very far from the origin. |
| 17 // It creates a large blurred rect/rectori then renders the 4 corners and the |
| 18 // middle. |
| 19 class BigBlursGM : public GM { |
| 20 public: |
| 21 BigBlursGM() { |
| 22 this->setBGColor(0xFFDDDDDD); |
| 23 } |
| 24 |
| 25 protected: |
| 26 virtual SkString onShortName() SK_OVERRIDE { |
| 27 return SkString("bigblurs"); |
| 28 } |
| 29 |
| 30 virtual SkISize onISize() SK_OVERRIDE { |
| 31 return make_isize(kWidth, kHeight); |
| 32 } |
| 33 |
| 34 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 35 static const int kBig = 65536; |
| 36 static const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToS
calar(4)); |
| 37 |
| 38 const SkRect bigRect = SkRect::MakeWH(SkIntToScalar(kBig), SkIntToScalar
(kBig)); |
| 39 SkRect insetRect = bigRect; |
| 40 insetRect.inset(20, 20); |
| 41 |
| 42 SkPath rectori; |
| 43 |
| 44 rectori.addRect(bigRect); |
| 45 rectori.addRect(insetRect, SkPath::kCCW_Direction); |
| 46 |
| 47 // The blur extends 3*kSigma out from the big rect. |
| 48 // Offset the close-up windows so we get the entire blur |
| 49 static const SkScalar kLeftTopPad = 3*kSigma; // use on left & up of
big rect |
| 50 static const SkScalar kRightBotPad = kCloseUpSize-3*kSigma; // use on ri
ght and bot sides |
| 51 |
| 52 // UL hand corners of the rendered closeups |
| 53 const SkPoint origins[] = { |
| 54 { -kLeftTopPad, -kLeftTopPad }, // UL |
| 55 { kBig-kRightBotPad, -kLeftTopPad }, // UR |
| 56 { kBig-kRightBotPad, kBig-kRightBotPad }, // LR |
| 57 { -kLeftTopPad, kBig-kRightBotPad }, // LL |
| 58 { kBig/2-kCloseUpSize/2, kBig/2-kCloseUpSize/2 }, // center |
| 59 }; |
| 60 |
| 61 SkPaint outlinePaint; |
| 62 outlinePaint.setColor(SK_ColorRED); |
| 63 outlinePaint.setStyle(SkPaint::kStroke_Style); |
| 64 |
| 65 SkPaint blurPaint; |
| 66 blurPaint.setAntiAlias(true); |
| 67 blurPaint.setColor(SK_ColorBLACK); |
| 68 |
| 69 int desiredX = 0, desiredY = 0; |
| 70 |
| 71 for (int i = 0; i < 2; ++i) { |
| 72 for (int j = 0; j < SkBlurMaskFilter::kBlurStyleCount; ++j) { |
| 73 SkMaskFilter* mf = SkBlurMaskFilter::Create((SkBlurMaskFilter::B
lurStyle)j, |
| 74 kSigma); |
| 75 blurPaint.setMaskFilter(mf)->unref(); |
| 76 |
| 77 for (int k = 0; k < (int)SK_ARRAY_COUNT(origins); ++k) { |
| 78 canvas->save(); |
| 79 |
| 80 SkRect clipRect = SkRect::MakeXYWH(SkIntToScalar(desiredX), |
| 81 SkIntToScalar(desiredY), |
| 82 SkIntToScalar(kCloseUpSiz
e), |
| 83 SkIntToScalar(kCloseUpSiz
e)); |
| 84 |
| 85 canvas->clipRect(clipRect, SkRegion::kReplace_Op, false); |
| 86 |
| 87 canvas->translate(desiredX-origins[k].fX, |
| 88 desiredY-origins[k].fY); |
| 89 |
| 90 if (0 == i) { |
| 91 canvas->drawRect(bigRect, blurPaint); |
| 92 } else { |
| 93 canvas->drawPath(rectori, blurPaint); |
| 94 } |
| 95 canvas->restore(); |
| 96 canvas->drawRect(clipRect, outlinePaint); |
| 97 |
| 98 desiredX += kCloseUpSize; |
| 99 } |
| 100 |
| 101 desiredX = 0; |
| 102 desiredY += kCloseUpSize; |
| 103 } |
| 104 } |
| 105 } |
| 106 |
| 107 private: |
| 108 static const int kCloseUpSize = 64; |
| 109 static const int kWidth = 5 * kCloseUpSize; |
| 110 static const int kHeight = 2 * SkBlurMaskFilter::kBlurStyleCount * kCloseUpS
ize; |
| 111 |
| 112 typedef GM INHERITED; |
| 113 }; |
| 114 |
| 115 DEF_GM( return SkNEW(BigBlursGM); ) |
| 116 |
| 117 } |
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