OLD | NEW |
1 | |
2 /* | 1 /* |
3 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
4 * | 3 * |
5 * 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 |
6 * found in the LICENSE file. | 5 * found in the LICENSE file. |
7 */ | 6 */ |
8 | 7 |
9 | |
10 #ifndef SkBlurMask_DEFINED | 8 #ifndef SkBlurMask_DEFINED |
11 #define SkBlurMask_DEFINED | 9 #define SkBlurMask_DEFINED |
12 | 10 |
| 11 #include "SkBlurTypes.h" |
13 #include "SkShader.h" | 12 #include "SkShader.h" |
14 #include "SkMask.h" | 13 #include "SkMask.h" |
15 #include "SkRRect.h" | 14 #include "SkRRect.h" |
16 | 15 |
17 class SkBlurMask { | 16 class SkBlurMask { |
18 public: | 17 public: |
19 enum Style { | 18 static bool BlurRect(SkScalar sigma, SkMask *dst, const SkRect &src, SkBlurS
tyle, |
20 kNormal_Style, //!< fuzzy inside and outside | |
21 kSolid_Style, //!< solid inside, fuzzy outside | |
22 kOuter_Style, //!< nothing inside, fuzzy outside | |
23 kInner_Style, //!< fuzzy inside, nothing outside | |
24 | |
25 kStyleCount | |
26 }; | |
27 | |
28 enum Quality { | |
29 kLow_Quality, //!< box blur | |
30 kHigh_Quality //!< three pass box blur (similar to gaussian) | |
31 }; | |
32 | |
33 static bool BlurRect(SkScalar sigma, SkMask *dst, const SkRect &src, | |
34 Style style, | |
35 SkIPoint *margin = NULL, | 19 SkIPoint *margin = NULL, |
36 SkMask::CreateMode createMode = | 20 SkMask::CreateMode createMode = |
37 SkMask::kComputeBoundsAndRenderI
mage_CreateMode); | 21 SkMask::kComputeBoundsAndRenderI
mage_CreateMode); |
38 static bool BlurRRect(SkScalar sigma, SkMask *dst, const SkRRect &src, | 22 static bool BlurRRect(SkScalar sigma, SkMask *dst, const SkRRect &src, SkBlu
rStyle, |
39 Style style, | |
40 SkIPoint *margin = NULL, | 23 SkIPoint *margin = NULL, |
41 SkMask::CreateMode createMode = | 24 SkMask::CreateMode createMode = |
42 SkMask::kComputeBoundsAndRenderI
mage_CreateMode); | 25 SkMask::kComputeBoundsAndRenderI
mage_CreateMode); |
43 | 26 |
44 // 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 |
45 // 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 |
46 // 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, |
47 // 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 |
48 // rectangle will lie. | 31 // rectangle will lie. |
49 | 32 |
50 static bool BoxBlur(SkMask* dst, const SkMask& src, | 33 static bool BoxBlur(SkMask* dst, const SkMask& src, |
51 SkScalar sigma, Style style, Quality quality, | 34 SkScalar sigma, SkBlurStyle style, SkBlurQuality quality
, |
52 SkIPoint* margin = NULL, bool forceQuality = false); | 35 SkIPoint* margin = NULL, bool forceQuality = false); |
53 | 36 |
54 // the "ground truth" blur does a gaussian convolution; it's slow | 37 // the "ground truth" blur does a gaussian convolution; it's slow |
55 // but useful for comparison purposes. | 38 // but useful for comparison purposes. |
56 static bool BlurGroundTruth(SkScalar sigma, SkMask* dst, const SkMask& src, | 39 static bool BlurGroundTruth(SkScalar sigma, SkMask* dst, const SkMask& src,
SkBlurStyle, |
57 Style style, | |
58 SkIPoint* margin = NULL); | 40 SkIPoint* margin = NULL); |
59 | 41 |
60 static SkScalar ConvertRadiusToSigma(SkScalar radius); | 42 static SkScalar ConvertRadiusToSigma(SkScalar radius); |
61 | 43 |
62 /* Helper functions for analytic rectangle blurs */ | 44 /* Helper functions for analytic rectangle blurs */ |
63 | 45 |
64 /** Look up the intensity of the (one dimnensional) blurred half-plane. | 46 /** Look up the intensity of the (one dimnensional) blurred half-plane. |
65 @param profile The precomputed 1D blur profile; memory allocated by and
managed by | 47 @param profile The precomputed 1D blur profile; memory allocated by and
managed by |
66 ComputeBlurProfile below. | 48 ComputeBlurProfile below. |
67 @param loc the location to look up; The lookup will clamp invalid inputs
, but | 49 @param loc the location to look up; The lookup will clamp invalid inputs
, but |
(...skipping 21 matching lines...) Expand all Loading... |
89 */ | 71 */ |
90 | 72 |
91 static void ComputeBlurredScanline(uint8_t* pixels, const uint8_t* profile, | 73 static void ComputeBlurredScanline(uint8_t* pixels, const uint8_t* profile, |
92 unsigned int width, SkScalar sigma); | 74 unsigned int width, SkScalar sigma); |
93 | 75 |
94 | 76 |
95 | 77 |
96 }; | 78 }; |
97 | 79 |
98 #endif | 80 #endif |
OLD | NEW |