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Side by Side Diff: src/effects/SkBlurMask.h

Issue 1539553002: Add default ctor to SkMask (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Add warning for ignored return values Created 5 years ago
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1 /* 1 /*
2 * Copyright 2006 The Android Open Source Project 2 * Copyright 2006 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 #ifndef SkBlurMask_DEFINED 8 #ifndef SkBlurMask_DEFINED
9 #define SkBlurMask_DEFINED 9 #define SkBlurMask_DEFINED
10 10
11 #include "SkBlurTypes.h" 11 #include "SkBlurTypes.h"
12 #include "SkShader.h" 12 #include "SkShader.h"
13 #include "SkMask.h" 13 #include "SkMask.h"
14 #include "SkRRect.h" 14 #include "SkRRect.h"
15 15
16 class SkBlurMask { 16 class SkBlurMask {
17 public: 17 public:
18 static bool BlurRect(SkScalar sigma, SkMask *dst, const SkRect &src, SkBlurS tyle, 18 static bool SK_WARN_UNUSED_RESULT BlurRect(SkScalar sigma, SkMask *dst, cons t SkRect &src,
19 SkIPoint *margin = nullptr, 19 SkBlurStyle, SkIPoint *margin = n ullptr,
20 SkMask::CreateMode createMode = 20 SkMask::CreateMode createMode =
21 SkMask::kComputeBoundsAndRenderI mage_CreateMode); 21 SkMask::kComputeBoundsAndRende rImage_CreateMode);
22 static bool BlurRRect(SkScalar sigma, SkMask *dst, const SkRRect &src, SkBlu rStyle, 22 static bool SK_WARN_UNUSED_RESULT BlurRRect(SkScalar sigma, SkMask *dst, con st SkRRect &src,
23 SkIPoint *margin = nullptr, 23 SkBlurStyle, SkIPoint *margin = nullptr,
24 SkMask::CreateMode createMode = 24 SkMask::CreateMode createMode =
25 SkMask::kComputeBoundsAndRenderI mage_CreateMode); 25 SkMask::kComputeBoundsAndRende rImage_CreateMode);
26 26
27 // forceQuality will prevent BoxBlur from falling back to the low quality ap proach when sigma 27 // forceQuality will prevent BoxBlur from falling back to the low quality ap proach when sigma
28 // is very small -- this can be used predict the margin bump ahead of time w ithout completely 28 // is very small -- this can be used predict the margin bump ahead of time w ithout completely
29 // replicating the internal logic. This permits not only simpler caching of blurred results, 29 // replicating the internal logic. This permits not only simpler caching of blurred results,
30 // but also being able to predict precisely at what pixels the blurred profi le of e.g. a 30 // but also being able to predict precisely at what pixels the blurred profi le of e.g. a
31 // rectangle will lie. 31 // rectangle will lie.
32 32
33 static bool BoxBlur(SkMask* dst, const SkMask& src, 33 static bool SK_WARN_UNUSED_RESULT BoxBlur(SkMask* dst, const SkMask& src,
34 SkScalar sigma, SkBlurStyle style, SkBlurQuality quality , 34 SkScalar sigma, SkBlurStyle style, SkBlurQuality,
35 SkIPoint* margin = nullptr, bool force_quality=false); 35 SkIPoint* margin = nullptr,
36 bool forceQuality = false);
36 37
37 // the "ground truth" blur does a gaussian convolution; it's slow 38 // the "ground truth" blur does a gaussian convolution; it's slow
38 // but useful for comparison purposes. 39 // but useful for comparison purposes.
39 static bool BlurGroundTruth(SkScalar sigma, SkMask* dst, const SkMask& src, SkBlurStyle, 40 static bool SK_WARN_UNUSED_RESULT BlurGroundTruth(SkScalar sigma, SkMask* ds t,
40 SkIPoint* margin = nullptr); 41 const SkMask& src,
42 SkBlurStyle, SkIPoint* mar gin = nullptr);
41 43
42 // If radius > 0, return the corresponding sigma, else return 0 44 // If radius > 0, return the corresponding sigma, else return 0
43 static SkScalar ConvertRadiusToSigma(SkScalar radius); 45 static SkScalar ConvertRadiusToSigma(SkScalar radius);
44 // If sigma > 0.5, return the corresponding radius, else return 0 46 // If sigma > 0.5, return the corresponding radius, else return 0
45 static SkScalar ConvertSigmaToRadius(SkScalar sigma); 47 static SkScalar ConvertSigmaToRadius(SkScalar sigma);
46 48
47 /* Helper functions for analytic rectangle blurs */ 49 /* Helper functions for analytic rectangle blurs */
48 50
49 /** Look up the intensity of the (one dimnensional) blurred half-plane. 51 /** Look up the intensity of the (one dimnensional) blurred half-plane.
50 @param profile The precomputed 1D blur profile; memory allocated by and managed by 52 @param profile The precomputed 1D blur profile; memory allocated by and managed by
(...skipping 22 matching lines...) Expand all
73 */ 75 */
74 76
75 static void ComputeBlurredScanline(uint8_t* pixels, const uint8_t* profile, 77 static void ComputeBlurredScanline(uint8_t* pixels, const uint8_t* profile,
76 unsigned int width, SkScalar sigma); 78 unsigned int width, SkScalar sigma);
77 79
78 80
79 81
80 }; 82 };
81 83
82 #endif 84 #endif
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