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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_InstanceProcessor_DEFINED |
| 9 #define gr_instanced_InstanceProcessor_DEFINED |
| 10 |
| 11 #include "GrBufferAccess.h" |
| 12 #include "GrGeometryProcessor.h" |
| 13 #include "instanced/InstancedRenderingTypes.h" |
| 14 |
| 15 namespace gr_instanced { |
| 16 |
| 17 /** |
| 18 * This class provides a GP implementation that uses instanced rendering. Is sen
ds geometry in as |
| 19 * basic, pre-baked canonical shapes, and uses instanced vertex attribs to contr
ol how these shapes |
| 20 * are transformed and drawn. MSAA is accomplished with the sample mask rather t
han finely |
| 21 * tesselated geometry. |
| 22 */ |
| 23 class InstanceProcessor : public GrGeometryProcessor { |
| 24 public: |
| 25 static bool IsSupported(const GrGLSLCaps&, const GrCaps&, AntialiasMode* las
tSupportedAAMode); |
| 26 |
| 27 InstanceProcessor(BatchInfo, GrBuffer* paramsBuffer); |
| 28 |
| 29 const char* name() const override { return "Instance Processor"; } |
| 30 BatchInfo batchInfo() const { return fBatchInfo; } |
| 31 |
| 32 void getGLSLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder* b) const
override { |
| 33 b->add32(fBatchInfo.fData); |
| 34 } |
| 35 GrGLSLPrimitiveProcessor* createGLSLInstance(const GrGLSLCaps&) const overri
de; |
| 36 |
| 37 /** |
| 38 * Returns a buffer of ShapeVertex that defines the canonical instanced geom
etry. |
| 39 */ |
| 40 static const GrBuffer* SK_WARN_UNUSED_RESULT FindOrCreateVertexBuffer(GrGpu*
); |
| 41 |
| 42 /** |
| 43 * Returns a buffer of 8-bit indices for the canonical instanced geometry. T
he client can call |
| 44 * GetIndexRangeForXXX to know which indices to use for a specific shape. |
| 45 */ |
| 46 static const GrBuffer* SK_WARN_UNUSED_RESULT FindOrCreateIndex8Buffer(GrGpu*
); |
| 47 |
| 48 static IndexRange GetIndexRangeForRect(AntialiasMode); |
| 49 static IndexRange GetIndexRangeForOval(AntialiasMode, const SkRect& devBound
s); |
| 50 static IndexRange GetIndexRangeForRRect(AntialiasMode); |
| 51 |
| 52 static const char* GetNameOfIndexRange(IndexRange); |
| 53 |
| 54 private: |
| 55 const BatchInfo fBatchInfo; |
| 56 GrBufferAccess fParamsAccess; |
| 57 |
| 58 typedef GrGeometryProcessor INHERITED; |
| 59 }; |
| 60 |
| 61 } |
| 62 |
| 63 #endif |
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