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authorGravatar csmartdalton <csmartdalton@google.com>2016-06-30 12:15:49 -0700
committerGravatar Commit bot <commit-bot@chromium.org>2016-06-30 12:15:49 -0700
commit42eafa4bc00354b132ad114d22ed6b95d8849891 (patch)
tree06cf28b2181094aa53d1232381dafa9d5d28d385 /src/gpu/instanced/InstancedRenderingTypes.h
parenta71b89866deeea26eb7fd9d41eb3d28ce60ee92a (diff)
Begin instanced rendering for simple shapes
Adds a module that performs instanced rendering and starts using it for a select subset of draws on Mac GL platforms. The instance processor can currently handle rects, ovals, round rects, and double round rects. It can generalize shapes as round rects in order to improve batching. The instance processor also employs new drawing algorithms, irrespective of instanced rendering, that improve GPU-side performance (e.g. sample mask, different triangle layouts, etc.). This change only scratches the surface of instanced rendering. The majority of draws still only have one instance. Future work may include: * Passing coord transforms through the texel buffer. * Sending FP uniforms through instanced vertex attribs. * Using instanced rendering for more draws (stencil writes, drawAtlas, etc.). * Adding more shapes to the instance processor’s repertoire. * Batching draws that have mismatched scissors (analyzing draw bounds, inserting clip planes, etc.). * Bindless textures. * Uber shaders. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2066993003 Review-Url: https://codereview.chromium.org/2066993003
Diffstat (limited to 'src/gpu/instanced/InstancedRenderingTypes.h')
-rw-r--r--src/gpu/instanced/InstancedRenderingTypes.h191
1 files changed, 191 insertions, 0 deletions
diff --git a/src/gpu/instanced/InstancedRenderingTypes.h b/src/gpu/instanced/InstancedRenderingTypes.h
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+++ b/src/gpu/instanced/InstancedRenderingTypes.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 gr_instanced_InstancedRenderingTypes_DEFINED
+#define gr_instanced_InstancedRenderingTypes_DEFINED
+
+#include "GrTypes.h"
+#include "SkRRect.h"
+
+namespace gr_instanced {
+
+/**
+ * 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.
+};
+
+enum class Attrib : uint8_t {
+ kShapeCoords,
+ kVertexAttrs,
+ kInstanceInfo,
+ kShapeMatrixX,
+ kShapeMatrixY,
+ kColor,
+ kLocalRect
+};
+constexpr int kNumAttribs = 1 + (int)Attrib::kLocalRect;
+
+enum class AntialiasMode : uint8_t {
+ kNone,
+ kCoverage,
+ kMSAA,
+ kMixedSamples
+};
+constexpr int kNumAntialiasModes = 1 + (int)AntialiasMode::kMixedSamples;
+
+enum class ShapeType : uint8_t {
+ kRect,
+ kOval,
+ kSimpleRRect,
+ kNinePatch,
+ kComplexRRect
+};
+constexpr int kNumShapeTypes = 1 + (int)ShapeType::kComplexRRect;
+
+inline static ShapeType GetRRectShapeType(const SkRRect& rrect) {
+ SkASSERT(rrect.getType() >= SkRRect::kRect_Type &&
+ rrect.getType() <= SkRRect::kComplex_Type);
+ return static_cast<ShapeType>(rrect.getType() - 1);
+
+ GR_STATIC_ASSERT((int)ShapeType::kRect == SkRRect::kRect_Type - 1);
+ GR_STATIC_ASSERT((int)ShapeType::kOval == SkRRect::kOval_Type - 1);
+ GR_STATIC_ASSERT((int)ShapeType::kSimpleRRect == SkRRect::kSimple_Type - 1);
+ GR_STATIC_ASSERT((int)ShapeType::kNinePatch == SkRRect::kNinePatch_Type - 1);
+ GR_STATIC_ASSERT((int)ShapeType::kComplexRRect == SkRRect::kComplex_Type - 1);
+ GR_STATIC_ASSERT(kNumShapeTypes == SkRRect::kComplex_Type);
+}
+
+enum ShapeFlag {
+ kRect_ShapeFlag = (1 << (int)ShapeType::kRect),
+ kOval_ShapeFlag = (1 << (int)ShapeType::kOval),
+ kSimpleRRect_ShapeFlag = (1 << (int)ShapeType::kSimpleRRect),
+ kNinePatch_ShapeFlag = (1 << (int)ShapeType::kNinePatch),
+ kComplexRRect_ShapeFlag = (1 << (int)ShapeType::kComplexRRect),
+
+ kRRect_ShapesMask = kSimpleRRect_ShapeFlag | kNinePatch_ShapeFlag | kComplexRRect_ShapeFlag
+};
+
+constexpr uint8_t GetShapeFlag(ShapeType type) { return 1 << (int)type; }
+
+/**
+ * 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((kNumShapeTypes - 1) <= (uint32_t)kShapeType_InfoMask >> kShapeType_InfoBit);
+GR_STATIC_ASSERT((int)ShapeType::kSimpleRRect <=
+ kInnerShapeType_InfoMask >> kInnerShapeType_InfoBit);
+
+/**
+ * Additional parameters required by some instances (e.g. round rect radii, perspective column,
+ * local matrix). These are accessed via texel buffer.
+ */
+struct ParamsTexel {
+ float fX, fY, fZ, fW;
+};
+
+GR_STATIC_ASSERT(0 == offsetof(ParamsTexel, fX));
+GR_STATIC_ASSERT(4 * 4 == sizeof(ParamsTexel));
+
+/**
+ * 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;
+ 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(kNumShapeTypes <= 8);
+
+template<typename T> struct TRange {
+ bool operator ==(const TRange& that) const {
+ return fStart == that.fStart && fCount == that.fCount;
+ }
+ bool operator !=(const TRange& that) const { return !(*this == that); }
+
+ bool isEmpty() const { return fCount <= 0; }
+ T end() { return fStart + fCount; }
+
+ T fStart;
+ T fCount;
+};
+
+typedef TRange<int16_t> IndexRange;
+typedef TRange<int> InstanceRange;
+
+}
+
+#endif