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Side by Side Diff: src/core/SkRasterPipeline.h

Issue 2195853002: SkRasterPipeline: new APIs for fusion (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: bench both ways Created 4 years, 4 months ago
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1 /* 1 /*
2 * Copyright 2016 Google Inc. 2 * Copyright 2016 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 SkRasterPipeline_DEFINED 8 #ifndef SkRasterPipeline_DEFINED
9 #define SkRasterPipeline_DEFINED 9 #define SkRasterPipeline_DEFINED
10 10
(...skipping 27 matching lines...) Expand all
38 * stages; transfer modes use these to hold the original destination pixel components. 38 * stages; transfer modes use these to hold the original destination pixel components.
39 * 39 *
40 * On some platforms the last four vectors are slower to work with than the othe r arguments. 40 * On some platforms the last four vectors are slower to work with than the othe r arguments.
41 * 41 *
42 * When done mutating its arguments and/or context, a stage can either: 42 * When done mutating its arguments and/or context, a stage can either:
43 * 1) call st->next() with its mutated arguments, chaining to the next stage o f the pipeline; or 43 * 1) call st->next() with its mutated arguments, chaining to the next stage o f the pipeline; or
44 * 2) return, indicating the pipeline is complete for these pixels. 44 * 2) return, indicating the pipeline is complete for these pixels.
45 * 45 *
46 * Some obvious stages that typically return are those that write a color to a d estination pointer, 46 * Some obvious stages that typically return are those that write a color to a d estination pointer,
47 * but any stage can short-circuit the rest of the pipeline by returning instead of calling next(). 47 * but any stage can short-circuit the rest of the pipeline by returning instead of calling next().
48 *
49 * TODO: explain EasyFn and SK_RASTER_STAGE
48 */ 50 */
49 51
50 class SkRasterPipeline { 52 class SkRasterPipeline {
51 public: 53 public:
52 struct Stage; 54 struct Stage;
53 using Fn = void(SK_VECTORCALL *)(Stage*, size_t, Sk4f,Sk4f,Sk4f,Sk4f, 55 using Fn = void(SK_VECTORCALL *)(Stage*, size_t, Sk4f,Sk4f,Sk4f,Sk4f,
54 Sk4f,Sk4f,Sk4f,Sk4f); 56 Sk4f,Sk4f,Sk4f,Sk4f);
57 using EasyFn = void(void*, size_t, Sk4f&, Sk4f&, Sk4f&, Sk4f&,
58 Sk4f&, Sk4f&, Sk4f&, Sk4f&);
59
55 struct Stage { 60 struct Stage {
56 template <typename T> 61 template <typename T>
57 T ctx() { return static_cast<T>(fCtx); } 62 T ctx() { return static_cast<T>(fCtx); }
58 63
59 void SK_VECTORCALL next(size_t x, Sk4f v0, Sk4f v1, Sk4f v2, Sk4f v3, 64 void SK_VECTORCALL next(size_t x, Sk4f v0, Sk4f v1, Sk4f v2, Sk4f v3,
60 Sk4f v4, Sk4f v5, Sk4f v6, Sk4f v7) { 65 Sk4f v4, Sk4f v5, Sk4f v6, Sk4f v7) {
61 // Stages are logically a pipeline, and physically are contiguous in an array. 66 // Stages are logically a pipeline, and physically are contiguous in an array.
62 // To get to the next stage, we just increment our pointer to the ne xt array element. 67 // To get to the next stage, we just increment our pointer to the ne xt array element.
63 fNext(this+1, x, v0,v1,v2,v3, v4,v5,v6,v7); 68 fNext(this+1, x, v0,v1,v2,v3, v4,v5,v6,v7);
64 } 69 }
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87 // Most stages don't actually care if they're working on 4 or 1 pixel. 92 // Most stages don't actually care if they're working on 4 or 1 pixel.
88 void append(Fn fn, const void* ctx = nullptr) { 93 void append(Fn fn, const void* ctx = nullptr) {
89 this->append(fn, ctx, fn, ctx); 94 this->append(fn, ctx, fn, ctx);
90 } 95 }
91 96
92 // Most 4 pixel or 1 pixel variants share the same context pointer. 97 // Most 4 pixel or 1 pixel variants share the same context pointer.
93 void append(Fn body, Fn tail, const void* ctx = nullptr) { 98 void append(Fn body, Fn tail, const void* ctx = nullptr) {
94 this->append(body, ctx, tail, ctx); 99 this->append(body, ctx, tail, ctx);
95 } 100 }
96 101
102
103 // Versions of append that can be used with static EasyFns (see SK_RASTER_ST AGE).
104 template <EasyFn body, EasyFn tail>
105 void append(const void* body_ctx, const void* tail_ctx) {
106 this->append(Easy<body>, body_ctx,
107 Easy<tail>, tail_ctx);
108 }
109
110 template <EasyFn fn>
111 void append(const void* ctx = nullptr) { this->append<fn, fn>(ctx, ctx); }
112
113 template <EasyFn body, EasyFn tail>
114 void append(const void* ctx = nullptr) { this->append<body, tail>(ctx, ctx); }
115
116
97 // Append all stages to this pipeline. 117 // Append all stages to this pipeline.
98 void extend(const SkRasterPipeline&); 118 void extend(const SkRasterPipeline&);
99 119
100 private: 120 private:
101 using Stages = SkSTArray<10, Stage, /*MEM_COPY=*/true>; 121 using Stages = SkSTArray<10, Stage, /*MEM_COPY=*/true>;
102 122
103 // This no-op default makes fBodyStart and fTailStart unconditionally safe t o call, 123 // This no-op default makes fBodyStart and fTailStart unconditionally safe t o call,
104 // and is always the last stage's fNext as a sort of safety net to make sure even a 124 // and is always the last stage's fNext as a sort of safety net to make sure even a
105 // buggy pipeline can't walk off its own end. 125 // buggy pipeline can't walk off its own end.
106 static void SK_VECTORCALL JustReturn(Stage*, size_t, Sk4f,Sk4f,Sk4f,Sk4f, 126 static void SK_VECTORCALL JustReturn(Stage*, size_t, Sk4f,Sk4f,Sk4f,Sk4f,
107 Sk4f,Sk4f,Sk4f,Sk4f); 127 Sk4f,Sk4f,Sk4f,Sk4f);
108 128
129 template <EasyFn kernel>
130 static void SK_VECTORCALL Easy(SkRasterPipeline::Stage* st, size_t x,
131 Sk4f r, Sk4f g, Sk4f b, Sk4f a,
132 Sk4f dr, Sk4f dg, Sk4f db, Sk4f da) {
133 kernel(st->ctx<void*>(), x, r,g,b,a, dr,dg,db,da);
134 st->next(x, r,g,b,a, dr,dg,db,da);
135 }
136
109 Stages fBody, 137 Stages fBody,
110 fTail; 138 fTail;
111 Fn fBodyStart = &JustReturn, 139 Fn fBodyStart = &JustReturn,
112 fTailStart = &JustReturn; 140 fTailStart = &JustReturn;
113 }; 141 };
114 142
143 // These are always static, and we _really_ want them to inline.
144 // If you find yourself wanting a non-inline stage, write a SkRasterPipeline::Fn directly.
145 #define SK_RASTER_STAGE(name) \
146 static SK_ALWAYS_INLINE void name(void* ctx, size_t x, \
147 Sk4f& r, Sk4f& g, Sk4f& b, Sk4f& a, \
148 Sk4f& dr, Sk4f& dg, Sk4f& db, Sk4f& da)
149
115 #endif//SkRasterPipeline_DEFINED 150 #endif//SkRasterPipeline_DEFINED
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