xref: /aosp_15_r20/external/skia/src/gpu/graphite/geom/AnalyticBlurMask.h (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker /*
2*c8dee2aaSAndroid Build Coastguard Worker  * Copyright 2024 Google LLC
3*c8dee2aaSAndroid Build Coastguard Worker  *
4*c8dee2aaSAndroid Build Coastguard Worker  * Use of this source code is governed by a BSD-style license that can be
5*c8dee2aaSAndroid Build Coastguard Worker  * found in the LICENSE file.
6*c8dee2aaSAndroid Build Coastguard Worker  */
7*c8dee2aaSAndroid Build Coastguard Worker 
8*c8dee2aaSAndroid Build Coastguard Worker #ifndef skgpu_graphite_geom_AnalyticBlurMask_DEFINED
9*c8dee2aaSAndroid Build Coastguard Worker #define skgpu_graphite_geom_AnalyticBlurMask_DEFINED
10*c8dee2aaSAndroid Build Coastguard Worker 
11*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkM44.h"
12*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkRefCnt.h"
13*c8dee2aaSAndroid Build Coastguard Worker #include "src/gpu/graphite/TextureProxy.h"
14*c8dee2aaSAndroid Build Coastguard Worker #include "src/gpu/graphite/geom/Rect.h"
15*c8dee2aaSAndroid Build Coastguard Worker 
16*c8dee2aaSAndroid Build Coastguard Worker #include <optional>
17*c8dee2aaSAndroid Build Coastguard Worker #include <utility>
18*c8dee2aaSAndroid Build Coastguard Worker 
19*c8dee2aaSAndroid Build Coastguard Worker class SkMatrix;
20*c8dee2aaSAndroid Build Coastguard Worker class SkRRect;
21*c8dee2aaSAndroid Build Coastguard Worker struct SkRect;
22*c8dee2aaSAndroid Build Coastguard Worker 
23*c8dee2aaSAndroid Build Coastguard Worker namespace skgpu::graphite {
24*c8dee2aaSAndroid Build Coastguard Worker 
25*c8dee2aaSAndroid Build Coastguard Worker class Recorder;
26*c8dee2aaSAndroid Build Coastguard Worker class Transform;
27*c8dee2aaSAndroid Build Coastguard Worker 
28*c8dee2aaSAndroid Build Coastguard Worker /**
29*c8dee2aaSAndroid Build Coastguard Worker  * AnalyticBlurMask holds the shader inputs used to do an analytic blur over rects, rrects, or
30*c8dee2aaSAndroid Build Coastguard Worker  * circles.
31*c8dee2aaSAndroid Build Coastguard Worker  */
32*c8dee2aaSAndroid Build Coastguard Worker class AnalyticBlurMask {
33*c8dee2aaSAndroid Build Coastguard Worker public:
34*c8dee2aaSAndroid Build Coastguard Worker     enum class ShapeType {
35*c8dee2aaSAndroid Build Coastguard Worker         kRect,
36*c8dee2aaSAndroid Build Coastguard Worker         kRRect,
37*c8dee2aaSAndroid Build Coastguard Worker         kCircle,
38*c8dee2aaSAndroid Build Coastguard Worker     };
39*c8dee2aaSAndroid Build Coastguard Worker 
40*c8dee2aaSAndroid Build Coastguard Worker     static_assert(0 == static_cast<int>(ShapeType::kRect),
41*c8dee2aaSAndroid Build Coastguard Worker                   "Blur shader code depends on AnalyticBlurMask::ShapeType");
42*c8dee2aaSAndroid Build Coastguard Worker     static_assert(1 == static_cast<int>(ShapeType::kRRect),
43*c8dee2aaSAndroid Build Coastguard Worker                   "Blur shader code depends on AnalyticBlurMask::ShapeType");
44*c8dee2aaSAndroid Build Coastguard Worker     static_assert(2 == static_cast<int>(ShapeType::kCircle),
45*c8dee2aaSAndroid Build Coastguard Worker                   "Blur shader code depends on AnalyticBlurMask::ShapeType");
46*c8dee2aaSAndroid Build Coastguard Worker 
47*c8dee2aaSAndroid Build Coastguard Worker     AnalyticBlurMask() = delete;
48*c8dee2aaSAndroid Build Coastguard Worker 
49*c8dee2aaSAndroid Build Coastguard Worker     static std::optional<AnalyticBlurMask> Make(Recorder*,
50*c8dee2aaSAndroid Build Coastguard Worker                                                 const Transform& localToDevice,
51*c8dee2aaSAndroid Build Coastguard Worker                                                 float deviceSigma,
52*c8dee2aaSAndroid Build Coastguard Worker                                                 const SkRRect& srcRRect);
53*c8dee2aaSAndroid Build Coastguard Worker 
drawBounds()54*c8dee2aaSAndroid Build Coastguard Worker     const Rect& drawBounds() const { return fDrawBounds; }
deviceToScaledShape()55*c8dee2aaSAndroid Build Coastguard Worker     const SkM44& deviceToScaledShape() const { return fDevToScaledShape; }
shapeData()56*c8dee2aaSAndroid Build Coastguard Worker     const Rect& shapeData() const { return fShapeData; }
shapeType()57*c8dee2aaSAndroid Build Coastguard Worker     ShapeType shapeType() const { return fShapeType; }
blurData()58*c8dee2aaSAndroid Build Coastguard Worker     const SkV2& blurData() const { return fBlurData; }
refProxy()59*c8dee2aaSAndroid Build Coastguard Worker     sk_sp<TextureProxy> refProxy() const { return fProxy; }
60*c8dee2aaSAndroid Build Coastguard Worker 
61*c8dee2aaSAndroid Build Coastguard Worker private:
AnalyticBlurMask(const Rect & drawBounds,const SkM44 & devToScaledShape,ShapeType shapeType,const Rect & shapeData,const SkV2 & blurData,sk_sp<TextureProxy> proxy)62*c8dee2aaSAndroid Build Coastguard Worker     AnalyticBlurMask(const Rect& drawBounds,
63*c8dee2aaSAndroid Build Coastguard Worker                      const SkM44& devToScaledShape,
64*c8dee2aaSAndroid Build Coastguard Worker                      ShapeType shapeType,
65*c8dee2aaSAndroid Build Coastguard Worker                      const Rect& shapeData,
66*c8dee2aaSAndroid Build Coastguard Worker                      const SkV2& blurData,
67*c8dee2aaSAndroid Build Coastguard Worker                      sk_sp<TextureProxy> proxy)
68*c8dee2aaSAndroid Build Coastguard Worker             : fDrawBounds(drawBounds)
69*c8dee2aaSAndroid Build Coastguard Worker             , fDevToScaledShape(devToScaledShape)
70*c8dee2aaSAndroid Build Coastguard Worker             , fShapeData(shapeData)
71*c8dee2aaSAndroid Build Coastguard Worker             , fBlurData(blurData)
72*c8dee2aaSAndroid Build Coastguard Worker             , fShapeType(shapeType)
73*c8dee2aaSAndroid Build Coastguard Worker             , fProxy(std::move(proxy)) {}
74*c8dee2aaSAndroid Build Coastguard Worker 
75*c8dee2aaSAndroid Build Coastguard Worker     static std::optional<AnalyticBlurMask> MakeRect(Recorder*,
76*c8dee2aaSAndroid Build Coastguard Worker                                                     const SkMatrix& localToDevice,
77*c8dee2aaSAndroid Build Coastguard Worker                                                     float devSigma,
78*c8dee2aaSAndroid Build Coastguard Worker                                                     const SkRect& srcRect);
79*c8dee2aaSAndroid Build Coastguard Worker 
80*c8dee2aaSAndroid Build Coastguard Worker     static std::optional<AnalyticBlurMask> MakeCircle(Recorder*,
81*c8dee2aaSAndroid Build Coastguard Worker                                                       const SkMatrix& localToDevice,
82*c8dee2aaSAndroid Build Coastguard Worker                                                       float devSigma,
83*c8dee2aaSAndroid Build Coastguard Worker                                                       const SkRect& srcRect,
84*c8dee2aaSAndroid Build Coastguard Worker                                                       const SkRect& devRect);
85*c8dee2aaSAndroid Build Coastguard Worker 
86*c8dee2aaSAndroid Build Coastguard Worker     static std::optional<AnalyticBlurMask> MakeRRect(Recorder* recorder,
87*c8dee2aaSAndroid Build Coastguard Worker                                                      const SkMatrix& localToDevice,
88*c8dee2aaSAndroid Build Coastguard Worker                                                      float devSigma,
89*c8dee2aaSAndroid Build Coastguard Worker                                                      const SkRRect& srcRRect,
90*c8dee2aaSAndroid Build Coastguard Worker                                                      const SkRRect& devRRect);
91*c8dee2aaSAndroid Build Coastguard Worker 
92*c8dee2aaSAndroid Build Coastguard Worker     // Draw bounds in local space.
93*c8dee2aaSAndroid Build Coastguard Worker     Rect fDrawBounds;
94*c8dee2aaSAndroid Build Coastguard Worker 
95*c8dee2aaSAndroid Build Coastguard Worker     // Transforms device-space coordinates to the shape data's space.
96*c8dee2aaSAndroid Build Coastguard Worker     SkM44 fDevToScaledShape;
97*c8dee2aaSAndroid Build Coastguard Worker 
98*c8dee2aaSAndroid Build Coastguard Worker     // Shape data, which can define a rectangle, circle, or rounded rectangle.
99*c8dee2aaSAndroid Build Coastguard Worker     // This data is in a local space defined by the concatenation of the local-to-device matrix and
100*c8dee2aaSAndroid Build Coastguard Worker     // fDevToScaledShape.
101*c8dee2aaSAndroid Build Coastguard Worker     Rect fShapeData;
102*c8dee2aaSAndroid Build Coastguard Worker 
103*c8dee2aaSAndroid Build Coastguard Worker     // "fBlurData" holds different data depending on the shape type, for the unique needs of the
104*c8dee2aaSAndroid Build Coastguard Worker     // shape types' respective shaders.
105*c8dee2aaSAndroid Build Coastguard Worker     // In the rectangle case, it holds:
106*c8dee2aaSAndroid Build Coastguard Worker     //   x = a boolean indicating whether we can use a fast path for sampling the blur integral
107*c8dee2aaSAndroid Build Coastguard Worker     //       because the rectangle is larger than 6*sigma in both dimensions, and
108*c8dee2aaSAndroid Build Coastguard Worker     //   y = the value "1 / (6*sigma)".
109*c8dee2aaSAndroid Build Coastguard Worker     // In the rounded rectangle case, it holds:
110*c8dee2aaSAndroid Build Coastguard Worker     //   x = the size of the blurred edge, defined as "2*blurRadius + cornerRadius", and
111*c8dee2aaSAndroid Build Coastguard Worker     //   y is unused.
112*c8dee2aaSAndroid Build Coastguard Worker     // In the circle case, this data is unused.
113*c8dee2aaSAndroid Build Coastguard Worker     SkV2 fBlurData;
114*c8dee2aaSAndroid Build Coastguard Worker 
115*c8dee2aaSAndroid Build Coastguard Worker     ShapeType fShapeType;
116*c8dee2aaSAndroid Build Coastguard Worker     sk_sp<TextureProxy> fProxy;
117*c8dee2aaSAndroid Build Coastguard Worker };
118*c8dee2aaSAndroid Build Coastguard Worker 
119*c8dee2aaSAndroid Build Coastguard Worker }  // namespace skgpu::graphite
120*c8dee2aaSAndroid Build Coastguard Worker 
121*c8dee2aaSAndroid Build Coastguard Worker #endif  // skgpu_graphite_geom_AnalyticBlurMask_DEFINED
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