Index: src/gpu/GrInstancedRenderingTypes.h |
diff --git a/src/gpu/GrInstancedRenderingTypes.h b/src/gpu/GrInstancedRenderingTypes.h |
new file mode 100644 |
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+++ b/src/gpu/GrInstancedRenderingTypes.h |
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+/* |
+ * Copyright 2016 Google Inc. |
+ * |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+#ifndef GrInstancedRenderingTypes_DEFINED |
+#define GrInstancedRenderingTypes_DEFINED |
+ |
+#include "GrTypes.h" |
+#include "SkRRect.h" |
+ |
+/** |
+ * Internal structs and enums for classes involved in instanced rendering. This class is intended |
+ * to be inherited non-publicly. |
+ */ |
+class GrInstancedRenderingTypes { |
+public: |
+ /** |
+ * Per-vertex data. These values get fed into normal vertex attribs. |
+ */ |
+ struct ShapeVertex { |
+ float fX, fY; //!< Shape coordinates. |
+ int32_t fAttrs; //!< Shape-specific vertex attributes, if needed. |
+ }; |
+ |
+ /** |
+ * Per-instance data. These values get fed into instanced vertex attribs. |
+ */ |
+ struct Instance { |
+ uint32_t fInfo; //!< Packed info about the instance. See InfoBits. |
+ float fShapeMatrix2x3[6]; //!< Maps canonical shape coords -> device space coords. |
+ uint32_t fColor; //!< Color to be written out by the primitive processor. |
+ float fLocalRect[4]; //!< Local coords rect that spans [-1, +1] in shape coords. |
+ }; |
+ |
+ /** |
+ * Additional parameters required by some instances (e.g. round rect radii, perspective column, |
+ * local matrix). These are accessed via texel buffer. |
+ */ |
+ struct ParamsTexel { |
+ union { |
+ struct { float fX, fY, fZ, fW; }; |
+ float fValues[4]; |
+ }; |
+ }; |
+ |
+ GR_STATIC_ASSERT(0 == offsetof(ParamsTexel, fX)); |
+ GR_STATIC_ASSERT(4 * 4 == sizeof(ParamsTexel)); |
+ |
+ enum AttribIdx { |
+ kShapeCoords_AttribIdx, |
+ kVertexAttrs_AttribIdx, |
+ kInstanceInfo_AttribIdx, |
+ kShapeMatrixX_AttribIdx, |
+ kShapeMatrixY_AttribIdx, |
+ kColor_AttribIdx, |
+ kLocalRect_AttribIdx, |
+ |
+ kNumVertexAttribs |
+ }; |
+ |
+ enum AntialiasMode { |
+ kNone_AntialiasMode, |
+ kCoverage_AntialiasMode, |
+ kMSAA_AntialiasMode, |
+ kMixedSamples_AntialiasMode, |
+ |
+ kLast_AntialiasMode = kMixedSamples_AntialiasMode |
+ }; |
+ |
+ enum AntialiasFlags { |
+ kNone_AntialiasFlag = (1 << kNone_AntialiasMode), |
+ kCoverage_AntialiasFlag = (1 << kCoverage_AntialiasMode), |
+ kMSAA_AntialiasFlag = (1 << kMSAA_AntialiasMode), |
+ kMixedSamples_AntialiasFlag = (1 << kMixedSamples_AntialiasMode) |
+ }; |
+ |
+ enum ShapeType { |
+ kRect_ShapeType, |
+ kOval_ShapeType, |
+ kSimpleRRect_ShapeType, |
+ kNinePatch_ShapeType, |
+ kComplexRRect_ShapeType, |
+ |
+ kLast_ShapeType = kComplexRRect_ShapeType |
+ }; |
+ |
+ static ShapeType RRectShapeType(const SkRRect& rrect) { |
+ SkASSERT(rrect.getType() >= SkRRect::kRect_Type && |
+ rrect.getType() <= SkRRect::kComplex_Type); |
+ return static_cast<ShapeType>(rrect.getType() - 1); |
+ |
+ GR_STATIC_ASSERT(kRect_ShapeType == SkRRect::kRect_Type - 1); |
+ GR_STATIC_ASSERT(kOval_ShapeType == SkRRect::kOval_Type - 1); |
+ GR_STATIC_ASSERT(kSimpleRRect_ShapeType == SkRRect::kSimple_Type - 1); |
+ GR_STATIC_ASSERT(kNinePatch_ShapeType == SkRRect::kNinePatch_Type - 1); |
+ GR_STATIC_ASSERT(kComplexRRect_ShapeType == SkRRect::kComplex_Type - 1); |
+ GR_STATIC_ASSERT(kLast_ShapeType == SkRRect::kComplex_Type - 1); |
+ } |
+ |
+ enum ShapeFlag { |
+ kRect_ShapeFlag = (1 << kRect_ShapeType), |
+ kOval_ShapeFlag = (1 << kOval_ShapeType), |
+ kSimpleRRect_ShapeFlag = (1 << kSimpleRRect_ShapeType), |
+ kNinePatch_ShapeFlag = (1 << kNinePatch_ShapeType), |
+ kComplexRRect_ShapeFlag = (1 << kComplexRRect_ShapeType), |
+ |
+ kRRect_ShapesMask = kSimpleRRect_ShapeFlag | kNinePatch_ShapeFlag | kComplexRRect_ShapeFlag |
+ }; |
+ |
+ /** |
+ * Defines what data is stored at which bits in the fInfo field of the instanced data. |
+ */ |
+ enum InfoBits { |
+ kShapeType_InfoBit = 29, |
+ kInnerShapeType_InfoBit = 27, |
+ kPerspective_InfoBit = 26, |
+ kLocalMatrix_InfoBit = 25, |
+ kParamsIdx_InfoBit = 0 |
+ }; |
+ |
+ enum InfoMasks { |
+ kShapeType_InfoMask = 0u - (1 << kShapeType_InfoBit), |
+ kInnerShapeType_InfoMask = (1 << kShapeType_InfoBit) - (1 << kInnerShapeType_InfoBit), |
+ kPerspective_InfoFlag = (1 << kPerspective_InfoBit), |
+ kLocalMatrix_InfoFlag = (1 << kLocalMatrix_InfoBit), |
+ kParamsIdx_InfoMask = (1 << kLocalMatrix_InfoBit) - 1 |
+ }; |
+ |
+ GR_STATIC_ASSERT(kLast_ShapeType <= (uint32_t)kShapeType_InfoMask >> kShapeType_InfoBit); |
+ GR_STATIC_ASSERT(kSimpleRRect_ShapeType <= kInnerShapeType_InfoMask >> kInnerShapeType_InfoBit); |
+ |
+ /** |
+ * Tracks all information needed in order to draw a batch of instances. This struct also serves |
+ * as an all-in-one shader key for the batch. |
+ */ |
+ struct BatchInfo { |
+ BatchInfo() : fData(0) {} |
+ |
+ bool isSimpleRects() const { |
+ return !((fShapeTypes & ~kRect_ShapeFlag) | fInnerShapeTypes); |
+ } |
+ |
+ bool canJoin(BatchInfo that) const { |
+ if (fAntialiasMode != that.fAntialiasMode) { |
+ return false; |
+ } |
+ if (SkToBool(fInnerShapeTypes) != SkToBool(that.fInnerShapeTypes)) { |
+ // GrInstanceProcessor can't currently combine draws with and without inner shapes. |
+ return false; |
+ } |
+ if (fCannotDiscard != that.fCannotDiscard) { |
+ // For stencil draws, the use of discard can be a requirement. |
+ return false; |
+ } |
+ return true; |
+ } |
+ |
+ void join(BatchInfo that) { |
+ SkASSERT(this->canJoin(that)); |
+ fData |= that.fData; |
+ } |
+ |
+ union { |
+ struct { |
+ AntialiasMode fAntialiasMode : 8; |
+ uint8_t fShapeTypes; |
+ uint8_t fInnerShapeTypes; |
+ bool fHasPerspective : 1; |
+ bool fHasLocalMatrix : 1; |
+ bool fHasParams : 1; |
+ bool fNonSquare : 1; |
+ bool fUsesLocalCoords : 1; |
+ bool fCannotTweakAlphaForCoverage : 1; |
+ bool fCannotDiscard : 1; |
+ }; |
+ uint32_t fData; |
+ }; |
+ }; |
+ |
+ // This is required since all the data must fit into 32 bits of a shader key. |
+ GR_STATIC_ASSERT(sizeof(uint32_t) == sizeof(BatchInfo)); |
+ GR_STATIC_ASSERT(kLast_ShapeType <= 8); |
+}; |
+ |
+#endif |