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1 /* | 1 /* |
2 * Copyright 2011 The Android Open Source Project | 2 * Copyright 2011 The Android Open Source Project |
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 "SkBlurImageFilter.h" | |
9 | |
10 #include "SkAutoPixmapStorage.h" | 8 #include "SkAutoPixmapStorage.h" |
11 #include "SkColorPriv.h" | 9 #include "SkColorPriv.h" |
12 #include "SkGpuBlurUtils.h" | 10 #include "SkGpuBlurUtils.h" |
13 #include "SkOpts.h" | 11 #include "SkOpts.h" |
14 #include "SkReadBuffer.h" | 12 #include "SkReadBuffer.h" |
15 #include "SkSpecialImage.h" | 13 #include "SkSpecialImage.h" |
16 #include "SkWriteBuffer.h" | 14 #include "SkWriteBuffer.h" |
17 | 15 |
18 #if SK_SUPPORT_GPU | 16 #if SK_SUPPORT_GPU |
19 #include "GrContext.h" | 17 #include "GrContext.h" |
20 #include "SkGr.h" | 18 #include "SkGr.h" |
21 #endif | 19 #endif |
22 | 20 |
23 sk_sp<SkImageFilter> SkBlurImageFilter::Make(SkScalar sigmaX, SkScalar sigmaY, | 21 class SkBlurImageFilterImpl : public SkImageFilter { |
| 22 public: |
| 23 SkBlurImageFilterImpl(SkScalar sigmaX, |
| 24 SkScalar sigmaY, |
| 25 sk_sp<SkImageFilter> input, |
| 26 const CropRect* cropRect); |
| 27 |
| 28 SkRect computeFastBounds(const SkRect&) const override; |
| 29 |
| 30 SK_TO_STRING_OVERRIDE() |
| 31 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurImageFilterImpl) |
| 32 |
| 33 #ifdef SK_SUPPORT_LEGACY_IMAGEFILTER_PTR |
| 34 static SkImageFilter* Create(SkScalar sigmaX, SkScalar sigmaY, SkImageFilter
* input = nullptr, |
| 35 const CropRect* cropRect = nullptr) { |
| 36 return SkImageFilter::MakeBlur(sigmaX, sigmaY, sk_ref_sp<SkImageFilter>(
input), |
| 37 cropRect).release(); |
| 38 } |
| 39 #endif |
| 40 |
| 41 protected: |
| 42 void flatten(SkWriteBuffer&) const override; |
| 43 sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&, |
| 44 SkIPoint* offset) const override; |
| 45 SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix&, MapDirection
) const override; |
| 46 |
| 47 private: |
| 48 SkSize fSigma; |
| 49 typedef SkImageFilter INHERITED; |
| 50 |
| 51 friend class SkImageFilter; |
| 52 }; |
| 53 |
| 54 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkImageFilter) |
| 55 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurImageFilterImpl) |
| 56 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
| 57 |
| 58 /////////////////////////////////////////////////////////////////////////////// |
| 59 |
| 60 sk_sp<SkImageFilter> SkImageFilter::MakeBlur(SkScalar sigmaX, SkScalar sigmaY, |
24 sk_sp<SkImageFilter> input, | 61 sk_sp<SkImageFilter> input, |
25 const CropRect* cropRect) { | 62 const CropRect* cropRect) { |
26 if (0 == sigmaX && 0 == sigmaY && !cropRect) { | 63 if (0 == sigmaX && 0 == sigmaY && !cropRect) { |
27 return input; | 64 return input; |
28 } | 65 } |
29 return sk_sp<SkImageFilter>(new SkBlurImageFilter(sigmaX, sigmaY, input, cro
pRect)); | 66 return sk_sp<SkImageFilter>(new SkBlurImageFilterImpl(sigmaX, sigmaY, input,
cropRect)); |
30 } | 67 } |
31 | 68 |
32 // This rather arbitrary-looking value results in a maximum box blur kernel size | 69 // This rather arbitrary-looking value results in a maximum box blur kernel size |
33 // of 1000 pixels on the raster path, which matches the WebKit and Firefox | 70 // of 1000 pixels on the raster path, which matches the WebKit and Firefox |
34 // implementations. Since the GPU path does not compute a box blur, putting | 71 // implementations. Since the GPU path does not compute a box blur, putting |
35 // the limit on sigma ensures consistent behaviour between the GPU and | 72 // the limit on sigma ensures consistent behaviour between the GPU and |
36 // raster paths. | 73 // raster paths. |
37 #define MAX_SIGMA SkIntToScalar(532) | 74 #define MAX_SIGMA SkIntToScalar(532) |
38 | 75 |
39 static SkVector map_sigma(const SkSize& localSigma, const SkMatrix& ctm) { | 76 static SkVector map_sigma(const SkSize& localSigma, const SkMatrix& ctm) { |
40 SkVector sigma = SkVector::Make(localSigma.width(), localSigma.height()); | 77 SkVector sigma = SkVector::Make(localSigma.width(), localSigma.height()); |
41 ctm.mapVectors(&sigma, 1); | 78 ctm.mapVectors(&sigma, 1); |
42 sigma.fX = SkMinScalar(SkScalarAbs(sigma.fX), MAX_SIGMA); | 79 sigma.fX = SkMinScalar(SkScalarAbs(sigma.fX), MAX_SIGMA); |
43 sigma.fY = SkMinScalar(SkScalarAbs(sigma.fY), MAX_SIGMA); | 80 sigma.fY = SkMinScalar(SkScalarAbs(sigma.fY), MAX_SIGMA); |
44 return sigma; | 81 return sigma; |
45 } | 82 } |
46 | 83 |
47 SkBlurImageFilter::SkBlurImageFilter(SkScalar sigmaX, | 84 SkBlurImageFilterImpl::SkBlurImageFilterImpl(SkScalar sigmaX, |
48 SkScalar sigmaY, | 85 SkScalar sigmaY, |
49 sk_sp<SkImageFilter> input, | 86 sk_sp<SkImageFilter> input, |
50 const CropRect* cropRect) | 87 const CropRect* cropRect) |
51 : INHERITED(&input, 1, cropRect) | 88 : INHERITED(&input, 1, cropRect) |
52 , fSigma(SkSize::Make(sigmaX, sigmaY)) { | 89 , fSigma(SkSize::Make(sigmaX, sigmaY)) { |
53 } | 90 } |
54 | 91 |
55 sk_sp<SkFlattenable> SkBlurImageFilter::CreateProc(SkReadBuffer& buffer) { | 92 sk_sp<SkFlattenable> SkBlurImageFilterImpl::CreateProc(SkReadBuffer& buffer) { |
56 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); | 93 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); |
57 SkScalar sigmaX = buffer.readScalar(); | 94 SkScalar sigmaX = buffer.readScalar(); |
58 SkScalar sigmaY = buffer.readScalar(); | 95 SkScalar sigmaY = buffer.readScalar(); |
59 return Make(sigmaX, sigmaY, common.getInput(0), &common.cropRect()); | 96 return SkImageFilter::MakeBlur(sigmaX, sigmaY, common.getInput(0), &common.c
ropRect()); |
60 } | 97 } |
61 | 98 |
62 void SkBlurImageFilter::flatten(SkWriteBuffer& buffer) const { | 99 void SkBlurImageFilterImpl::flatten(SkWriteBuffer& buffer) const { |
63 this->INHERITED::flatten(buffer); | 100 this->INHERITED::flatten(buffer); |
64 buffer.writeScalar(fSigma.fWidth); | 101 buffer.writeScalar(fSigma.fWidth); |
65 buffer.writeScalar(fSigma.fHeight); | 102 buffer.writeScalar(fSigma.fHeight); |
66 } | 103 } |
67 | 104 |
68 static void get_box3_params(SkScalar s, int *kernelSize, int* kernelSize3, int *
lowOffset, | 105 static void get_box3_params(SkScalar s, int *kernelSize, int* kernelSize3, int *
lowOffset, |
69 int *highOffset) { | 106 int *highOffset) { |
70 float pi = SkScalarToFloat(SK_ScalarPI); | 107 float pi = SkScalarToFloat(SK_ScalarPI); |
71 int d = static_cast<int>(floorf(SkScalarToFloat(s) * 3.0f * sqrtf(2.0f * pi)
/ 4.0f + 0.5f)); | 108 int d = static_cast<int>(floorf(SkScalarToFloat(s) * 3.0f * sqrtf(2.0f * pi)
/ 4.0f + 0.5f)); |
72 *kernelSize = d; | 109 *kernelSize = d; |
73 if (d % 2 == 1) { | 110 if (d % 2 == 1) { |
74 *lowOffset = *highOffset = (d - 1) / 2; | 111 *lowOffset = *highOffset = (d - 1) / 2; |
75 *kernelSize3 = d; | 112 *kernelSize3 = d; |
76 } else { | 113 } else { |
77 *highOffset = d / 2; | 114 *highOffset = d / 2; |
78 *lowOffset = *highOffset - 1; | 115 *lowOffset = *highOffset - 1; |
79 *kernelSize3 = d + 1; | 116 *kernelSize3 = d + 1; |
80 } | 117 } |
81 } | 118 } |
82 | 119 |
83 sk_sp<SkSpecialImage> SkBlurImageFilter::onFilterImage(SkSpecialImage* source, | 120 sk_sp<SkSpecialImage> SkBlurImageFilterImpl::onFilterImage(SkSpecialImage* sourc
e, |
84 const Context& ctx, | 121 const Context& ctx, |
85 SkIPoint* offset) const { | 122 SkIPoint* offset) const { |
86 SkIPoint inputOffset = SkIPoint::Make(0, 0); | 123 SkIPoint inputOffset = SkIPoint::Make(0, 0); |
87 | 124 |
88 sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset))
; | 125 sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset))
; |
89 if (!input) { | 126 if (!input) { |
90 return nullptr; | 127 return nullptr; |
91 } | 128 } |
92 | 129 |
93 SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.fX, inputOffset.fY, | 130 SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.fX, inputOffset.fY, |
(...skipping 130 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
224 SkOpts::box_blur_xx(d, h, dstBoundsT, t, kernelSizeY, highOffsetY,
lowOffsetY, h, w); | 261 SkOpts::box_blur_xx(d, h, dstBoundsT, t, kernelSizeY, highOffsetY,
lowOffsetY, h, w); |
225 SkOpts::box_blur_xy(t, h, dstBoundsT, d, kernelSizeY3, highOffsetY,
highOffsetY, h, w); | 262 SkOpts::box_blur_xy(t, h, dstBoundsT, d, kernelSizeY3, highOffsetY,
highOffsetY, h, w); |
226 } | 263 } |
227 | 264 |
228 return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(dstBounds.width(), | 265 return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(dstBounds.width(), |
229 dstBounds.height()), | 266 dstBounds.height()), |
230 dst, &source->props()); | 267 dst, &source->props()); |
231 } | 268 } |
232 | 269 |
233 | 270 |
234 SkRect SkBlurImageFilter::computeFastBounds(const SkRect& src) const { | 271 SkRect SkBlurImageFilterImpl::computeFastBounds(const SkRect& src) const { |
235 SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src
) : src; | 272 SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src
) : src; |
236 bounds.outset(SkScalarMul(fSigma.width(), SkIntToScalar(3)), | 273 bounds.outset(SkScalarMul(fSigma.width(), SkIntToScalar(3)), |
237 SkScalarMul(fSigma.height(), SkIntToScalar(3))); | 274 SkScalarMul(fSigma.height(), SkIntToScalar(3))); |
238 return bounds; | 275 return bounds; |
239 } | 276 } |
240 | 277 |
241 SkIRect SkBlurImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix
& ctm, | 278 SkIRect SkBlurImageFilterImpl::onFilterNodeBounds(const SkIRect& src, const SkMa
trix& ctm, |
242 MapDirection) const { | 279 MapDirection) const { |
243 SkVector sigma = map_sigma(fSigma, ctm); | 280 SkVector sigma = map_sigma(fSigma, ctm); |
244 return src.makeOutset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar
(3))), | 281 return src.makeOutset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar
(3))), |
245 SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar
(3)))); | 282 SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar
(3)))); |
246 } | 283 } |
247 | 284 |
248 #ifndef SK_IGNORE_TO_STRING | 285 #ifndef SK_IGNORE_TO_STRING |
249 void SkBlurImageFilter::toString(SkString* str) const { | 286 void SkBlurImageFilterImpl::toString(SkString* str) const { |
250 str->appendf("SkBlurImageFilter: ("); | 287 str->appendf("SkBlurImageFilterImpl: ("); |
251 str->appendf("sigma: (%f, %f) input (", fSigma.fWidth, fSigma.fHeight); | 288 str->appendf("sigma: (%f, %f) input (", fSigma.fWidth, fSigma.fHeight); |
252 | 289 |
253 if (this->getInput(0)) { | 290 if (this->getInput(0)) { |
254 this->getInput(0)->toString(str); | 291 this->getInput(0)->toString(str); |
255 } | 292 } |
256 | 293 |
257 str->append("))"); | 294 str->append("))"); |
258 } | 295 } |
259 #endif | 296 #endif |
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