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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 gr_instanced_InstancedRendering_DEFINED | |
9 #define gr_instanced_InstancedRendering_DEFINED | |
10 | |
11 #include "GrMemoryPool.h" | |
12 #include "SkTInternalLList.h" | |
13 #include "batches/GrDrawBatch.h" | |
14 #include "instanced/InstancedRenderingTypes.h" | |
15 #include "../private/GrInstancedPipelineInfo.h" | |
16 | |
17 class GrResourceProvider; | |
18 | |
19 namespace gr_instanced { | |
20 | |
21 class InstanceProcessor; | |
22 | |
23 /** | |
24 * This class serves as a centralized clearinghouse for instanced rendering. It
accumulates data for | |
25 * instanced draws into one location, and creates special batches that pull from
this data. The | |
26 * nature of instanced rendering allows these batches to combine well and render
efficiently. | |
27 * | |
28 * During a flush, this class assembles the accumulated draw data into a single
vertex and texel | |
29 * buffer, and its subclass draws the batches using backend-specific instanced r
endering APIs. | |
30 * | |
31 * This class is responsible for the CPU side of instanced rendering. Shaders ar
e implemented by | |
32 * InstanceProcessor. | |
33 */ | |
34 class InstancedRendering : public SkNoncopyable { | |
35 public: | |
36 virtual ~InstancedRendering() { SkASSERT(State::kRecordingDraws == fState);
} | |
37 | |
38 GrGpu* gpu() const { return fGpu; } | |
39 | |
40 /** | |
41 * These methods make a new record internally for an instanced draw, and ret
urn a batch that is | |
42 * effectively just an index to that record. The returned batch is not self-
contained, but | |
43 * rather relies on this class to handle the rendering. The client must call
beginFlush() on | |
44 * this class before attempting to flush batches returned by it. It is inval
id to record new | |
45 * draws between beginFlush() and endFlush(). | |
46 */ | |
47 GrDrawBatch* SK_WARN_UNUSED_RESULT recordRect(const SkRect&, const SkMatrix&
, GrColor, | |
48 bool antialias, const GrInstan
cedPipelineInfo&, | |
49 bool* useHWAA); | |
50 | |
51 GrDrawBatch* SK_WARN_UNUSED_RESULT recordRect(const SkRect&, const SkMatrix&
, GrColor, | |
52 const SkRect& localRect, bool
antialias, | |
53 const GrInstancedPipelineInfo&
, bool* useHWAA); | |
54 | |
55 GrDrawBatch* SK_WARN_UNUSED_RESULT recordRect(const SkRect&, const SkMatrix&
, GrColor, | |
56 const SkMatrix& localMatrix, b
ool antialias, | |
57 const GrInstancedPipelineInfo&
, bool* useHWAA); | |
58 | |
59 GrDrawBatch* SK_WARN_UNUSED_RESULT recordOval(const SkRect&, const SkMatrix&
, GrColor, | |
60 bool antialias, const GrInstan
cedPipelineInfo&, | |
61 bool* useHWAA); | |
62 | |
63 GrDrawBatch* SK_WARN_UNUSED_RESULT recordRRect(const SkRRect&, const SkMatri
x&, GrColor, | |
64 bool antialias, const GrInsta
ncedPipelineInfo&, | |
65 bool* useHWAA); | |
66 | |
67 GrDrawBatch* SK_WARN_UNUSED_RESULT recordDRRect(const SkRRect& outer, const
SkRRect& inner, | |
68 const SkMatrix&, GrColor, bo
ol antialias, | |
69 const GrInstancedPipelineInf
o&, bool* useHWAA); | |
70 | |
71 /** | |
72 * Compiles all recorded draws into GPU buffers and allows the client to beg
in flushing the | |
73 * batches created by this class. | |
74 */ | |
75 void beginFlush(GrResourceProvider*); | |
76 | |
77 /** | |
78 * Called once the batches created previously by this class have all been re
leased. Allows the | |
79 * client to begin recording draws again. | |
80 */ | |
81 void endFlush(); | |
82 | |
83 enum class ResetType : bool { | |
84 kDestroy, | |
85 kAbandon | |
86 }; | |
87 | |
88 /** | |
89 * Resets all GPU resources, including those that are held long term. They w
ill be lazily | |
90 * reinitialized if the class begins to be used again. | |
91 */ | |
92 void resetGpuResources(ResetType); | |
93 | |
94 protected: | |
95 class Batch : public GrDrawBatch { | |
96 public: | |
97 SK_DECLARE_INTERNAL_LLIST_INTERFACE(Batch); | |
98 | |
99 ~Batch() override; | |
100 const char* name() const override { return "Instanced Batch"; } | |
101 | |
102 struct Draw { | |
103 Instance fInstance; | |
104 IndexRange fGeometry; | |
105 Draw* fNext; | |
106 }; | |
107 | |
108 Draw& getSingleDraw() const { SkASSERT(fHeadDraw && !fHeadDraw->fNext);
return *fHeadDraw; } | |
109 Instance& getSingleInstance() const { return this->getSingleDraw().fInst
ance; } | |
110 | |
111 void appendRRectParams(const SkRRect&); | |
112 void appendParamsTexel(const SkScalar* vals, int count); | |
113 void appendParamsTexel(SkScalar x, SkScalar y, SkScalar z, SkScalar w); | |
114 void appendParamsTexel(SkScalar x, SkScalar y, SkScalar z); | |
115 | |
116 protected: | |
117 Batch(uint32_t classID, InstancedRendering* ir); | |
118 | |
119 void initBatchTracker(const GrXPOverridesForBatch&) override; | |
120 bool onCombineIfPossible(GrBatch* other, const GrCaps& caps) override; | |
121 | |
122 void computePipelineOptimizations(GrInitInvariantOutput* color, | |
123 GrInitInvariantOutput* coverage, | |
124 GrBatchToXPOverrides*) const override; | |
125 | |
126 void onPrepare(GrBatchFlushState*) override {} | |
127 void onDraw(GrBatchFlushState*) override; | |
128 | |
129 InstancedRendering* const fInstancedRendering; | |
130 BatchInfo fInfo; | |
131 SkSTArray<5, ParamsTexel, true> fParams; | |
132 bool fIsTracked; | |
133 int fNumDraws; | |
134 int fNumChangesInGeometry; | |
135 Draw* fHeadDraw; | |
136 Draw* fTailDraw; | |
137 | |
138 typedef GrDrawBatch INHERITED; | |
139 | |
140 friend class InstancedRendering; | |
141 }; | |
142 | |
143 typedef SkTInternalLList<Batch> BatchList; | |
144 | |
145 InstancedRendering(GrGpu* gpu, AntialiasMode lastSupportedAAMode, bool canRe
nderToFloat); | |
146 | |
147 const BatchList& trackedBatches() const { return fTrackedBatches; } | |
148 const GrBuffer* vertexBuffer() const { SkASSERT(fVertexBuffer); return fVert
exBuffer; } | |
149 const GrBuffer* indexBuffer() const { SkASSERT(fIndexBuffer); return fIndexB
uffer; } | |
150 | |
151 virtual void onBeginFlush(GrResourceProvider*) = 0; | |
152 virtual void onDraw(const GrPipeline&, const InstanceProcessor&, const Batch
*) = 0; | |
153 virtual void onEndFlush() = 0; | |
154 virtual void onResetGpuResources(ResetType) = 0; | |
155 | |
156 private: | |
157 enum class State : bool { | |
158 kRecordingDraws, | |
159 kFlushing | |
160 }; | |
161 | |
162 Batch* SK_WARN_UNUSED_RESULT recordShape(ShapeType, const SkRect& bounds, | |
163 const SkMatrix& viewMatrix, GrColor
, | |
164 const SkRect& localRect, bool antia
lias, | |
165 const GrInstancedPipelineInfo&, boo
l* requireHWAA); | |
166 | |
167 bool selectAntialiasMode(const SkMatrix& viewMatrix, bool antialias, | |
168 const GrInstancedPipelineInfo&, bool* useHWAA, Anti
aliasMode*); | |
169 | |
170 virtual Batch* createBatch() = 0; | |
171 | |
172 const SkAutoTUnref<GrGpu> fGpu; | |
173 const AntialiasMode fLastSupportedAAMode; | |
174 const bool fCanRenderToFloat; | |
175 State fState; | |
176 GrMemoryPool fDrawPool; | |
177 SkSTArray<1024, ParamsTexel, true> fParams; | |
178 BatchList fTrackedBatches; | |
179 SkAutoTUnref<const GrBuffer> fVertexBuffer; | |
180 SkAutoTUnref<const GrBuffer> fIndexBuffer; | |
181 SkAutoTUnref<GrBuffer> fParamsBuffer; | |
182 }; | |
183 | |
184 } | |
185 | |
186 #endif | |
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