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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 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 #ifndef _SkTestImageFilters_h | 8 #ifndef _SkTestImageFilters_h |
9 #define _SkTestImageFilters_h | 9 #define _SkTestImageFilters_h |
10 | 10 |
11 #include "SkImageFilter.h" | 11 #include "SkImageFilter.h" |
12 #include "SkPoint.h" | 12 #include "SkPoint.h" |
13 | 13 |
14 // Fun mode that scales down (only) and then scales back up to look pixelated | 14 // Fun mode that scales down (only) and then scales back up to look pixelated |
15 class SK_API SkDownSampleImageFilter : public SkImageFilter { | 15 class SK_API SkDownSampleImageFilter : public SkImageFilter { |
16 public: | 16 public: |
17 static sk_sp<SkImageFilter> Make(SkScalar scale, sk_sp<SkImageFilter> input)
{ | 17 static sk_sp<SkImageFilter> Make(SkScalar scale, sk_sp<SkImageFilter> input)
; |
18 if (!SkScalarIsFinite(scale)) { | |
19 return nullptr; | |
20 } | |
21 // we don't support scale in this range | |
22 if (scale > SK_Scalar1 || scale <= 0) { | |
23 return nullptr; | |
24 } | |
25 return sk_sp<SkImageFilter>(new SkDownSampleImageFilter(scale, std::move
(input))); | |
26 } | |
27 | 18 |
28 SK_TO_STRING_OVERRIDE() | 19 SK_TO_STRING_OVERRIDE() |
29 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDownSampleImageFilter) | 20 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDownSampleImageFilter) |
30 | 21 |
31 #ifdef SK_SUPPORT_LEGACY_IMAGEFILTER_PTR | 22 #ifdef SK_SUPPORT_LEGACY_IMAGEFILTER_PTR |
32 static SkImageFilter* Create(SkScalar scale, SkImageFilter* input = nullptr)
{ | 23 static SkImageFilter* Create(SkScalar scale, SkImageFilter* input = nullptr)
{ |
33 return Make(scale, sk_ref_sp<SkImageFilter>(input)).release(); | 24 return Make(scale, sk_ref_sp<SkImageFilter>(input)).release(); |
34 } | 25 } |
35 #endif | 26 #endif |
36 | 27 |
37 protected: | 28 protected: |
38 void flatten(SkWriteBuffer&) const override; | 29 void flatten(SkWriteBuffer&) const override; |
39 | 30 |
40 sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&, | 31 sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&, |
41 SkIPoint* offset) const override; | 32 SkIPoint* offset) const override; |
42 | 33 |
43 private: | 34 private: |
44 SkDownSampleImageFilter(SkScalar scale, sk_sp<SkImageFilter> input) | 35 SkDownSampleImageFilter(SkScalar scale, sk_sp<SkImageFilter> input) |
45 : INHERITED(&input, 1, nullptr), fScale(scale) {} | 36 : INHERITED(&input, 1, nullptr), fScale(scale) {} |
46 | 37 |
47 SkScalar fScale; | 38 SkScalar fScale; |
48 | 39 |
49 typedef SkImageFilter INHERITED; | 40 typedef SkImageFilter INHERITED; |
50 }; | 41 }; |
51 | 42 |
52 #endif | 43 #endif |
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