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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkDropShadowImageFilter.h" | 8 #include "SkDropShadowImageFilter.h" |
9 | 9 |
10 #include "SkBitmap.h" | 10 #include "SkBitmap.h" |
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59 } | 59 } |
60 | 60 |
61 bool SkDropShadowImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source
, const Context& ctx, SkBitmap* result, SkIPoint* offset) const | 61 bool SkDropShadowImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source
, const Context& ctx, SkBitmap* result, SkIPoint* offset) const |
62 { | 62 { |
63 SkBitmap src = source; | 63 SkBitmap src = source; |
64 SkIPoint srcOffset = SkIPoint::Make(0, 0); | 64 SkIPoint srcOffset = SkIPoint::Make(0, 0); |
65 if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcO
ffset)) | 65 if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcO
ffset)) |
66 return false; | 66 return false; |
67 | 67 |
68 SkIRect bounds; | 68 SkIRect bounds; |
69 if (!this->applyCropRect(ctx, src, srcOffset, &bounds)) { | 69 src.getBounds(&bounds); |
| 70 bounds.offset(srcOffset); |
| 71 if (!this->applyCropRect(&bounds, ctx.ctm())) { |
70 return false; | 72 return false; |
71 } | 73 } |
72 | 74 |
73 SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds
.height())); | 75 SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds
.height())); |
74 if (NULL == device.get()) { | 76 if (NULL == device.get()) { |
75 return false; | 77 return false; |
76 } | 78 } |
77 SkCanvas canvas(device.get()); | 79 SkCanvas canvas(device.get()); |
78 | 80 |
79 SkVector sigma, localSigma = SkVector::Make(fSigmaX, fSigmaY); | 81 SkVector sigma, localSigma = SkVector::Make(fSigmaX, fSigmaY); |
80 ctx.ctm().mapVectors(&sigma, &localSigma, 1); | 82 ctx.ctm().mapVectors(&sigma, &localSigma, 1); |
81 sigma.fX = SkMaxScalar(0, sigma.fX); | 83 sigma.fX = SkMaxScalar(0, sigma.fX); |
82 sigma.fY = SkMaxScalar(0, sigma.fY); | 84 sigma.fY = SkMaxScalar(0, sigma.fY); |
83 SkAutoTUnref<SkImageFilter> blurFilter(SkBlurImageFilter::Create(sigma.fX, s
igma.fY)); | 85 SkAutoTUnref<SkImageFilter> blurFilter(SkBlurImageFilter::Create(sigma.fX, s
igma.fY)); |
84 SkAutoTUnref<SkColorFilter> colorFilter(SkColorFilter::CreateModeFilter(fCol
or, SkXfermode::kSrcIn_Mode)); | 86 SkAutoTUnref<SkColorFilter> colorFilter(SkColorFilter::CreateModeFilter(fCol
or, SkXfermode::kSrcIn_Mode)); |
85 SkPaint paint; | 87 SkPaint paint; |
86 paint.setImageFilter(blurFilter.get()); | 88 paint.setImageFilter(blurFilter.get()); |
87 paint.setColorFilter(colorFilter.get()); | 89 paint.setColorFilter(colorFilter.get()); |
88 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); | 90 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); |
89 SkVector offsetVec, localOffsetVec = SkVector::Make(fDx, fDy); | 91 SkVector offsetVec, localOffsetVec = SkVector::Make(fDx, fDy); |
90 ctx.ctm().mapVectors(&offsetVec, &localOffsetVec, 1); | 92 ctx.ctm().mapVectors(&offsetVec, &localOffsetVec, 1); |
91 canvas.translate(SkIntToScalar(srcOffset.fX - bounds.fLeft), | 93 canvas.translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop)); |
92 SkIntToScalar(srcOffset.fY - bounds.fTop)); | |
93 canvas.drawBitmap(src, offsetVec.fX, offsetVec.fY, &paint); | 94 canvas.drawBitmap(src, offsetVec.fX, offsetVec.fY, &paint); |
94 canvas.drawBitmap(src, 0, 0); | 95 canvas.drawBitmap(src, 0, 0); |
95 *result = device->accessBitmap(false); | 96 *result = device->accessBitmap(false); |
96 offset->fX = bounds.fLeft; | 97 offset->fX = bounds.fLeft; |
97 offset->fY = bounds.fTop; | 98 offset->fY = bounds.fTop; |
98 return true; | 99 return true; |
99 } | 100 } |
100 | 101 |
101 void SkDropShadowImageFilter::computeFastBounds(const SkRect& src, SkRect* dst)
const { | 102 void SkDropShadowImageFilter::computeFastBounds(const SkRect& src, SkRect* dst)
const { |
102 if (getInput(0)) { | 103 if (getInput(0)) { |
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123 bounds.offset(-SkScalarCeilToInt(offsetVec.x()), | 124 bounds.offset(-SkScalarCeilToInt(offsetVec.x()), |
124 -SkScalarCeilToInt(offsetVec.y())); | 125 -SkScalarCeilToInt(offsetVec.y())); |
125 SkVector sigma, localSigma = SkVector::Make(fSigmaX, fSigmaY); | 126 SkVector sigma, localSigma = SkVector::Make(fSigmaX, fSigmaY); |
126 ctm.mapVectors(&sigma, &localSigma, 1); | 127 ctm.mapVectors(&sigma, &localSigma, 1); |
127 bounds.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))), | 128 bounds.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))), |
128 SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3)))); | 129 SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3)))); |
129 bounds.join(src); | 130 bounds.join(src); |
130 *dst = bounds; | 131 *dst = bounds; |
131 return true; | 132 return true; |
132 } | 133 } |
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