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Unified Diff: src/gpu/GrInstancedRenderingTypes.h

Issue 1897203002: Implement instanced rendering for simple shapes (Closed) Base URL: https://skia.googlesource.com/skia.git@upload2_requireHWAA
Patch Set: comments Created 4 years, 8 months ago
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Index: src/gpu/GrInstancedRenderingTypes.h
diff --git a/src/gpu/GrInstancedRenderingTypes.h b/src/gpu/GrInstancedRenderingTypes.h
new file mode 100644
index 0000000000000000000000000000000000000000..fcdad1797bb466bd8f6097fe17d73a466f4fbc8f
--- /dev/null
+++ b/src/gpu/GrInstancedRenderingTypes.h
@@ -0,0 +1,188 @@
+/*
+ * 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
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