1 /*
2  * Copyright 2016 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 
8 #ifndef GrShadowGeoProc_DEFINED
9 #define GrShadowGeoProc_DEFINED
10 
11 #include "src/core/SkArenaAlloc.h"
12 #include "src/gpu/GrGeometryProcessor.h"
13 #include "src/gpu/GrProcessor.h"
14 
15 class GrGLRRectShadowGeoProc;
16 class GrSurfaceProxyView;
17 
18 /**
19  * The output color of this effect is a coverage mask for a rrect shadow,
20  * assuming circular corner geometry.
21  */
22 class GrRRectShadowGeoProc : public GrGeometryProcessor {
23 public:
Make(SkArenaAlloc * arena,const GrSurfaceProxyView & lutView)24     static GrGeometryProcessor* Make(SkArenaAlloc* arena, const GrSurfaceProxyView& lutView) {
25         return arena->make<GrRRectShadowGeoProc>(lutView);
26     }
27 
name()28     const char* name() const override { return "RRectShadow"; }
29 
inPosition()30     const Attribute& inPosition() const { return fInPosition; }
inColor()31     const Attribute& inColor() const { return fInColor; }
inShadowParams()32     const Attribute& inShadowParams() const { return fInShadowParams; }
color()33     GrColor color() const { return fColor; }
34 
getGLSLProcessorKey(const GrShaderCaps & caps,GrProcessorKeyBuilder * b)35     void getGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override {}
36 
37     GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const override;
38 
39 private:
40     friend class ::SkArenaAlloc; // for access to ctor
41 
42     GrRRectShadowGeoProc(const GrSurfaceProxyView& lutView);
43 
onTextureSampler(int i)44     const TextureSampler& onTextureSampler(int i) const override { return fLUTTextureSampler; }
45 
46     GrColor          fColor;
47     TextureSampler   fLUTTextureSampler;
48 
49     Attribute fInPosition;
50     Attribute fInColor;
51     Attribute fInShadowParams;
52 
53     GR_DECLARE_GEOMETRY_PROCESSOR_TEST
54 
55     typedef GrGeometryProcessor INHERITED;
56 };
57 
58 #endif
59