| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/gpu/ops/GrShadowRRectOp.h" |
| |
| #include "include/private/GrRecordingContext.h" |
| #include "src/core/SkRRectPriv.h" |
| #include "src/gpu/GrBitmapTextureMaker.h" |
| #include "src/gpu/GrDrawOpTest.h" |
| #include "src/gpu/GrMemoryPool.h" |
| #include "src/gpu/GrOpFlushState.h" |
| #include "src/gpu/GrProxyProvider.h" |
| #include "src/gpu/GrRecordingContextPriv.h" |
| #include "src/gpu/effects/GrShadowGeoProc.h" |
| #include "src/gpu/ops/GrSimpleMeshDrawOpHelper.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Circle Data |
| // |
| // We have two possible cases for geometry for a circle: |
| |
| // In the case of a normal fill, we draw geometry for the circle as an octagon. |
| static const uint16_t gFillCircleIndices[] = { |
| // enter the octagon |
| // clang-format off |
| 0, 1, 8, 1, 2, 8, |
| 2, 3, 8, 3, 4, 8, |
| 4, 5, 8, 5, 6, 8, |
| 6, 7, 8, 7, 0, 8, |
| // clang-format on |
| }; |
| |
| // For stroked circles, we use two nested octagons. |
| static const uint16_t gStrokeCircleIndices[] = { |
| // enter the octagon |
| // clang-format off |
| 0, 1, 9, 0, 9, 8, |
| 1, 2, 10, 1, 10, 9, |
| 2, 3, 11, 2, 11, 10, |
| 3, 4, 12, 3, 12, 11, |
| 4, 5, 13, 4, 13, 12, |
| 5, 6, 14, 5, 14, 13, |
| 6, 7, 15, 6, 15, 14, |
| 7, 0, 8, 7, 8, 15, |
| // clang-format on |
| }; |
| |
| static const int kIndicesPerFillCircle = SK_ARRAY_COUNT(gFillCircleIndices); |
| static const int kIndicesPerStrokeCircle = SK_ARRAY_COUNT(gStrokeCircleIndices); |
| static const int kVertsPerStrokeCircle = 16; |
| static const int kVertsPerFillCircle = 9; |
| |
| static int circle_type_to_vert_count(bool stroked) { |
| return stroked ? kVertsPerStrokeCircle : kVertsPerFillCircle; |
| } |
| |
| static int circle_type_to_index_count(bool stroked) { |
| return stroked ? kIndicesPerStrokeCircle : kIndicesPerFillCircle; |
| } |
| |
| static const uint16_t* circle_type_to_indices(bool stroked) { |
| return stroked ? gStrokeCircleIndices : gFillCircleIndices; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // RoundRect Data |
| // |
| // The geometry for a shadow roundrect is similar to a 9-patch: |
| // ____________ |
| // |_|________|_| |
| // | | | | |
| // | | | | |
| // | | | | |
| // |_|________|_| |
| // |_|________|_| |
| // |
| // However, each corner is rendered as a fan rather than a simple quad, as below. (The diagram |
| // shows the upper part of the upper left corner. The bottom triangle would similarly be split |
| // into two triangles.) |
| // ________ |
| // |\ \ | |
| // | \ \ | |
| // | \\ | |
| // | \| |
| // -------- |
| // |
| // The center of the fan handles the curve of the corner. For roundrects where the stroke width |
| // is greater than the corner radius, the outer triangles blend from the curve to the straight |
| // sides. Otherwise these triangles will be degenerate. |
| // |
| // In the case where the stroke width is greater than the corner radius and the |
| // blur radius (overstroke), we add additional geometry to mark out the rectangle in the center. |
| // This rectangle extends the coverage values of the center edges of the 9-patch. |
| // ____________ |
| // |_|________|_| |
| // | |\ ____ /| | |
| // | | | | | | |
| // | | |____| | | |
| // |_|/______\|_| |
| // |_|________|_| |
| // |
| // For filled rrects we reuse the stroke geometry but add an additional quad to the center. |
| |
| static const uint16_t gRRectIndices[] = { |
| // clang-format off |
| // overstroke quads |
| // we place this at the beginning so that we can skip these indices when rendering as filled |
| 0, 6, 25, 0, 25, 24, |
| 6, 18, 27, 6, 27, 25, |
| 18, 12, 26, 18, 26, 27, |
| 12, 0, 24, 12, 24, 26, |
| |
| // corners |
| 0, 1, 2, 0, 2, 3, 0, 3, 4, 0, 4, 5, |
| 6, 11, 10, 6, 10, 9, 6, 9, 8, 6, 8, 7, |
| 12, 17, 16, 12, 16, 15, 12, 15, 14, 12, 14, 13, |
| 18, 19, 20, 18, 20, 21, 18, 21, 22, 18, 22, 23, |
| |
| // edges |
| 0, 5, 11, 0, 11, 6, |
| 6, 7, 19, 6, 19, 18, |
| 18, 23, 17, 18, 17, 12, |
| 12, 13, 1, 12, 1, 0, |
| |
| // fill quad |
| // we place this at the end so that we can skip these indices when rendering as stroked |
| 0, 6, 18, 0, 18, 12, |
| // clang-format on |
| }; |
| |
| // overstroke count |
| static const int kIndicesPerOverstrokeRRect = SK_ARRAY_COUNT(gRRectIndices) - 6; |
| // simple stroke count skips overstroke indices |
| static const int kIndicesPerStrokeRRect = kIndicesPerOverstrokeRRect - 6*4; |
| // fill count adds final quad to stroke count |
| static const int kIndicesPerFillRRect = kIndicesPerStrokeRRect + 6; |
| static const int kVertsPerStrokeRRect = 24; |
| static const int kVertsPerOverstrokeRRect = 28; |
| static const int kVertsPerFillRRect = 24; |
| |
| enum RRectType { |
| kFill_RRectType, |
| kStroke_RRectType, |
| kOverstroke_RRectType, |
| }; |
| |
| static int rrect_type_to_vert_count(RRectType type) { |
| switch (type) { |
| case kFill_RRectType: |
| return kVertsPerFillRRect; |
| case kStroke_RRectType: |
| return kVertsPerStrokeRRect; |
| case kOverstroke_RRectType: |
| return kVertsPerOverstrokeRRect; |
| } |
| SK_ABORT("Invalid type"); |
| } |
| |
| static int rrect_type_to_index_count(RRectType type) { |
| switch (type) { |
| case kFill_RRectType: |
| return kIndicesPerFillRRect; |
| case kStroke_RRectType: |
| return kIndicesPerStrokeRRect; |
| case kOverstroke_RRectType: |
| return kIndicesPerOverstrokeRRect; |
| } |
| SK_ABORT("Invalid type"); |
| } |
| |
| static const uint16_t* rrect_type_to_indices(RRectType type) { |
| switch (type) { |
| case kFill_RRectType: |
| case kStroke_RRectType: |
| return gRRectIndices + 6*4; |
| case kOverstroke_RRectType: |
| return gRRectIndices; |
| } |
| SK_ABORT("Invalid type"); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace { |
| |
| class ShadowCircularRRectOp final : public GrMeshDrawOp { |
| public: |
| DEFINE_OP_CLASS_ID |
| |
| // An insetWidth > 1/2 rect width or height indicates a simple fill. |
| ShadowCircularRRectOp(GrColor color, const SkRect& devRect, |
| float devRadius, bool isCircle, float blurRadius, float insetWidth, |
| GrSurfaceProxyView falloffView) |
| : INHERITED(ClassID()) |
| , fFalloffView(std::move(falloffView)) { |
| SkRect bounds = devRect; |
| SkASSERT(insetWidth > 0); |
| SkScalar innerRadius = 0.0f; |
| SkScalar outerRadius = devRadius; |
| SkScalar umbraInset; |
| |
| RRectType type = kFill_RRectType; |
| if (isCircle) { |
| umbraInset = 0; |
| } else { |
| umbraInset = std::max(outerRadius, blurRadius); |
| } |
| |
| // If stroke is greater than width or height, this is still a fill, |
| // otherwise we compute stroke params. |
| if (isCircle) { |
| innerRadius = devRadius - insetWidth; |
| type = innerRadius > 0 ? kStroke_RRectType : kFill_RRectType; |
| } else { |
| if (insetWidth <= 0.5f*std::min(devRect.width(), devRect.height())) { |
| // We don't worry about a real inner radius, we just need to know if we |
| // need to create overstroke vertices. |
| innerRadius = std::max(insetWidth - umbraInset, 0.0f); |
| type = innerRadius > 0 ? kOverstroke_RRectType : kStroke_RRectType; |
| } |
| } |
| |
| this->setBounds(bounds, HasAABloat::kNo, IsHairline::kNo); |
| |
| fGeoData.emplace_back(Geometry{color, outerRadius, umbraInset, innerRadius, |
| blurRadius, bounds, type, isCircle}); |
| if (isCircle) { |
| fVertCount = circle_type_to_vert_count(kStroke_RRectType == type); |
| fIndexCount = circle_type_to_index_count(kStroke_RRectType == type); |
| } else { |
| fVertCount = rrect_type_to_vert_count(type); |
| fIndexCount = rrect_type_to_index_count(type); |
| } |
| } |
| |
| const char* name() const override { return "ShadowCircularRRectOp"; } |
| |
| #ifdef SK_DEBUG |
| SkString dumpInfo() const override { |
| SkString string; |
| for (int i = 0; i < fGeoData.count(); ++i) { |
| string.appendf( |
| "Color: 0x%08x Rect [L: %.2f, T: %.2f, R: %.2f, B: %.2f]," |
| "OuterRad: %.2f, Umbra: %.2f, InnerRad: %.2f, BlurRad: %.2f\n", |
| fGeoData[i].fColor, fGeoData[i].fDevBounds.fLeft, fGeoData[i].fDevBounds.fTop, |
| fGeoData[i].fDevBounds.fRight, fGeoData[i].fDevBounds.fBottom, |
| fGeoData[i].fOuterRadius, fGeoData[i].fUmbraInset, |
| fGeoData[i].fInnerRadius, fGeoData[i].fBlurRadius); |
| } |
| string.append(INHERITED::dumpInfo()); |
| return string; |
| } |
| #endif |
| |
| FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; } |
| |
| GrProcessorSet::Analysis finalize(const GrCaps&, const GrAppliedClip*, |
| bool hasMixedSampledCoverage, GrClampType) override { |
| return GrProcessorSet::EmptySetAnalysis(); |
| } |
| |
| private: |
| struct Geometry { |
| GrColor fColor; |
| SkScalar fOuterRadius; |
| SkScalar fUmbraInset; |
| SkScalar fInnerRadius; |
| SkScalar fBlurRadius; |
| SkRect fDevBounds; |
| RRectType fType; |
| bool fIsCircle; |
| }; |
| |
| struct CircleVertex { |
| SkPoint fPos; |
| GrColor fColor; |
| SkPoint fOffset; |
| SkScalar fDistanceCorrection; |
| }; |
| |
| void fillInCircleVerts(const Geometry& args, bool isStroked, CircleVertex** verts) const { |
| |
| GrColor color = args.fColor; |
| SkScalar outerRadius = args.fOuterRadius; |
| SkScalar innerRadius = args.fInnerRadius; |
| SkScalar blurRadius = args.fBlurRadius; |
| SkScalar distanceCorrection = outerRadius / blurRadius; |
| |
| const SkRect& bounds = args.fDevBounds; |
| |
| // The inner radius in the vertex data must be specified in normalized space. |
| innerRadius = innerRadius / outerRadius; |
| |
| SkPoint center = SkPoint::Make(bounds.centerX(), bounds.centerY()); |
| SkScalar halfWidth = 0.5f * bounds.width(); |
| SkScalar octOffset = 0.41421356237f; // sqrt(2) - 1 |
| |
| (*verts)->fPos = center + SkPoint::Make(-octOffset * halfWidth, -halfWidth); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(-octOffset, -1); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(octOffset * halfWidth, -halfWidth); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(octOffset, -1); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(halfWidth, -octOffset * halfWidth); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(1, -octOffset); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(halfWidth, octOffset * halfWidth); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(1, octOffset); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(octOffset * halfWidth, halfWidth); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(octOffset, 1); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(-octOffset * halfWidth, halfWidth); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(-octOffset, 1); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(-halfWidth, octOffset * halfWidth); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(-1, octOffset); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(-halfWidth, -octOffset * halfWidth); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(-1, -octOffset); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| if (isStroked) { |
| // compute the inner ring |
| |
| // cosine and sine of pi/8 |
| SkScalar c = 0.923579533f; |
| SkScalar s = 0.382683432f; |
| SkScalar r = args.fInnerRadius; |
| |
| (*verts)->fPos = center + SkPoint::Make(-s * r, -c * r); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(-s * innerRadius, -c * innerRadius); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(s * r, -c * r); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(s * innerRadius, -c * innerRadius); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(c * r, -s * r); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(c * innerRadius, -s * innerRadius); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(c * r, s * r); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(c * innerRadius, s * innerRadius); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(s * r, c * r); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(s * innerRadius, c * innerRadius); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(-s * r, c * r); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(-s * innerRadius, c * innerRadius); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(-c * r, s * r); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(-c * innerRadius, s * innerRadius); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = center + SkPoint::Make(-c * r, -s * r); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(-c * innerRadius, -s * innerRadius); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| } else { |
| // filled |
| (*verts)->fPos = center; |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(0, 0); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| } |
| } |
| |
| void fillInRRectVerts(const Geometry& args, CircleVertex** verts) const { |
| GrColor color = args.fColor; |
| SkScalar outerRadius = args.fOuterRadius; |
| |
| const SkRect& bounds = args.fDevBounds; |
| |
| SkScalar umbraInset = args.fUmbraInset; |
| SkScalar minDim = 0.5f*std::min(bounds.width(), bounds.height()); |
| if (umbraInset > minDim) { |
| umbraInset = minDim; |
| } |
| |
| SkScalar xInner[4] = { bounds.fLeft + umbraInset, bounds.fRight - umbraInset, |
| bounds.fLeft + umbraInset, bounds.fRight - umbraInset }; |
| SkScalar xMid[4] = { bounds.fLeft + outerRadius, bounds.fRight - outerRadius, |
| bounds.fLeft + outerRadius, bounds.fRight - outerRadius }; |
| SkScalar xOuter[4] = { bounds.fLeft, bounds.fRight, |
| bounds.fLeft, bounds.fRight }; |
| SkScalar yInner[4] = { bounds.fTop + umbraInset, bounds.fTop + umbraInset, |
| bounds.fBottom - umbraInset, bounds.fBottom - umbraInset }; |
| SkScalar yMid[4] = { bounds.fTop + outerRadius, bounds.fTop + outerRadius, |
| bounds.fBottom - outerRadius, bounds.fBottom - outerRadius }; |
| SkScalar yOuter[4] = { bounds.fTop, bounds.fTop, |
| bounds.fBottom, bounds.fBottom }; |
| |
| SkScalar blurRadius = args.fBlurRadius; |
| |
| // In the case where we have to inset more for the umbra, our two triangles in the |
| // corner get skewed to a diamond rather than a square. To correct for that, |
| // we also skew the vectors we send to the shader that help define the circle. |
| // By doing so, we end up with a quarter circle in the corner rather than the |
| // elliptical curve. |
| |
| // This is a bit magical, but it gives us the correct results at extrema: |
| // a) umbraInset == outerRadius produces an orthogonal vector |
| // b) outerRadius == 0 produces a diagonal vector |
| // And visually the corner looks correct. |
| SkVector outerVec = SkVector::Make(outerRadius - umbraInset, -outerRadius - umbraInset); |
| outerVec.normalize(); |
| // We want the circle edge to fall fractionally along the diagonal at |
| // (sqrt(2)*(umbraInset - outerRadius) + outerRadius)/sqrt(2)*umbraInset |
| // |
| // Setting the components of the diagonal offset to the following value will give us that. |
| SkScalar diagVal = umbraInset / (SK_ScalarSqrt2*(outerRadius - umbraInset) - outerRadius); |
| SkVector diagVec = SkVector::Make(diagVal, diagVal); |
| SkScalar distanceCorrection = umbraInset / blurRadius; |
| |
| // build corner by corner |
| for (int i = 0; i < 4; ++i) { |
| // inner point |
| (*verts)->fPos = SkPoint::Make(xInner[i], yInner[i]); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkVector::Make(0, 0); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| // outer points |
| (*verts)->fPos = SkPoint::Make(xOuter[i], yInner[i]); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkVector::Make(0, -1); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = SkPoint::Make(xOuter[i], yMid[i]); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = outerVec; |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = SkPoint::Make(xOuter[i], yOuter[i]); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = diagVec; |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = SkPoint::Make(xMid[i], yOuter[i]); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = outerVec; |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| (*verts)->fPos = SkPoint::Make(xInner[i], yOuter[i]); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkVector::Make(0, -1); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| } |
| |
| // Add the additional vertices for overstroked rrects. |
| // Effectively this is an additional stroked rrect, with its |
| // parameters equal to those in the center of the 9-patch. This will |
| // give constant values across this inner ring. |
| if (kOverstroke_RRectType == args.fType) { |
| SkASSERT(args.fInnerRadius > 0.0f); |
| |
| SkScalar inset = umbraInset + args.fInnerRadius; |
| |
| // TL |
| (*verts)->fPos = SkPoint::Make(bounds.fLeft + inset, bounds.fTop + inset); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(0, 0); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| // TR |
| (*verts)->fPos = SkPoint::Make(bounds.fRight - inset, bounds.fTop + inset); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(0, 0); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| // BL |
| (*verts)->fPos = SkPoint::Make(bounds.fLeft + inset, bounds.fBottom - inset); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(0, 0); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| |
| // BR |
| (*verts)->fPos = SkPoint::Make(bounds.fRight - inset, bounds.fBottom - inset); |
| (*verts)->fColor = color; |
| (*verts)->fOffset = SkPoint::Make(0, 0); |
| (*verts)->fDistanceCorrection = distanceCorrection; |
| (*verts)++; |
| } |
| |
| } |
| |
| void onPrepareDraws(Target* target) override { |
| // Setup geometry processor |
| GrGeometryProcessor* gp = GrRRectShadowGeoProc::Make(target->allocator(), |
| fFalloffView); |
| |
| int instanceCount = fGeoData.count(); |
| SkASSERT(sizeof(CircleVertex) == gp->vertexStride()); |
| |
| sk_sp<const GrBuffer> vertexBuffer; |
| int firstVertex; |
| CircleVertex* verts = (CircleVertex*)target->makeVertexSpace( |
| sizeof(CircleVertex), fVertCount, &vertexBuffer, &firstVertex); |
| if (!verts) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| sk_sp<const GrBuffer> indexBuffer; |
| int firstIndex = 0; |
| uint16_t* indices = target->makeIndexSpace(fIndexCount, &indexBuffer, &firstIndex); |
| if (!indices) { |
| SkDebugf("Could not allocate indices\n"); |
| return; |
| } |
| |
| int currStartVertex = 0; |
| for (int i = 0; i < instanceCount; i++) { |
| const Geometry& args = fGeoData[i]; |
| |
| if (args.fIsCircle) { |
| bool isStroked = SkToBool(kStroke_RRectType == args.fType); |
| this->fillInCircleVerts(args, isStroked, &verts); |
| |
| const uint16_t* primIndices = circle_type_to_indices(isStroked); |
| const int primIndexCount = circle_type_to_index_count(isStroked); |
| for (int i = 0; i < primIndexCount; ++i) { |
| *indices++ = primIndices[i] + currStartVertex; |
| } |
| |
| currStartVertex += circle_type_to_vert_count(isStroked); |
| |
| } else { |
| this->fillInRRectVerts(args, &verts); |
| |
| const uint16_t* primIndices = rrect_type_to_indices(args.fType); |
| const int primIndexCount = rrect_type_to_index_count(args.fType); |
| for (int i = 0; i < primIndexCount; ++i) { |
| *indices++ = primIndices[i] + currStartVertex; |
| } |
| |
| currStartVertex += rrect_type_to_vert_count(args.fType); |
| } |
| } |
| |
| auto fixedDynamicState = target->makeFixedDynamicState(1); |
| fixedDynamicState->fPrimitiveProcessorTextures[0] = fFalloffView.proxy(); |
| |
| GrMesh* mesh = target->allocMesh(); |
| mesh->setIndexed(std::move(indexBuffer), fIndexCount, firstIndex, 0, fVertCount - 1, |
| GrPrimitiveRestart::kNo); |
| mesh->setVertexData(std::move(vertexBuffer), firstVertex); |
| target->recordDraw(gp, mesh, 1, fixedDynamicState, nullptr, GrPrimitiveType::kTriangles); |
| } |
| |
| void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override { |
| auto pipeline = GrSimpleMeshDrawOpHelper::CreatePipeline(flushState, |
| GrProcessorSet::MakeEmptySet(), |
| GrPipeline::InputFlags::kNone); |
| |
| flushState->executeDrawsAndUploadsForMeshDrawOp(this, chainBounds, pipeline); |
| } |
| |
| CombineResult onCombineIfPossible(GrOp* t, GrRecordingContext::Arenas*, |
| const GrCaps& caps) override { |
| ShadowCircularRRectOp* that = t->cast<ShadowCircularRRectOp>(); |
| fGeoData.push_back_n(that->fGeoData.count(), that->fGeoData.begin()); |
| fVertCount += that->fVertCount; |
| fIndexCount += that->fIndexCount; |
| return CombineResult::kMerged; |
| } |
| |
| void visitProxies(const VisitProxyFunc& func) const override { |
| func(fFalloffView.proxy(), GrMipMapped(false)); |
| } |
| |
| SkSTArray<1, Geometry, true> fGeoData; |
| int fVertCount; |
| int fIndexCount; |
| GrSurfaceProxyView fFalloffView; |
| |
| typedef GrMeshDrawOp INHERITED; |
| }; |
| |
| } // anonymous namespace |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| namespace GrShadowRRectOp { |
| |
| static GrSurfaceProxyView create_falloff_texture(GrRecordingContext* context) { |
| static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey key; |
| GrUniqueKey::Builder builder(&key, kDomain, 0, "Shadow Gaussian Falloff"); |
| builder.finish(); |
| |
| GrProxyProvider* proxyProvider = context->priv().proxyProvider(); |
| |
| if (sk_sp<GrTextureProxy> falloffTexture = |
| proxyProvider->findOrCreateProxyByUniqueKey(key, GrColorType::kAlpha_8)) { |
| GrSwizzle swizzle = context->priv().caps()->getReadSwizzle(falloffTexture->backendFormat(), |
| GrColorType::kAlpha_8); |
| return {std::move(falloffTexture), kTopLeft_GrSurfaceOrigin, swizzle}; |
| } |
| |
| static const int kWidth = 128; |
| static const size_t kRowBytes = kWidth * GrColorTypeBytesPerPixel(GrColorType::kAlpha_8); |
| SkImageInfo ii = SkImageInfo::MakeA8(kWidth, 1); |
| |
| SkBitmap bitmap; |
| bitmap.allocPixels(ii, kRowBytes); |
| |
| unsigned char* values = (unsigned char*)bitmap.getPixels(); |
| for (int i = 0; i < 128; ++i) { |
| SkScalar d = SK_Scalar1 - i / SkIntToScalar(127); |
| values[i] = SkScalarRoundToInt((SkScalarExp(-4 * d * d) - 0.018f) * 255); |
| } |
| bitmap.setImmutable(); |
| |
| GrBitmapTextureMaker maker(context, bitmap); |
| auto view = maker.view(GrMipMapped::kNo); |
| SkASSERT(view.origin() == kTopLeft_GrSurfaceOrigin); |
| |
| if (view) { |
| proxyProvider->assignUniqueKeyToProxy(key, view.asTextureProxy()); |
| } |
| return view; |
| } |
| |
| |
| std::unique_ptr<GrDrawOp> Make(GrRecordingContext* context, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRRect& rrect, |
| SkScalar blurWidth, |
| SkScalar insetWidth) { |
| // Shadow rrect ops only handle simple circular rrects. |
| SkASSERT(viewMatrix.isSimilarity() && SkRRectPriv::EqualRadii(rrect)); |
| |
| GrSurfaceProxyView falloffView = create_falloff_texture(context); |
| if (!falloffView) { |
| return nullptr; |
| } |
| |
| // Do any matrix crunching before we reset the draw state for device coords. |
| const SkRect& rrectBounds = rrect.getBounds(); |
| SkRect bounds; |
| viewMatrix.mapRect(&bounds, rrectBounds); |
| |
| // Map radius and inset. As the matrix is a similarity matrix, this should be isotropic. |
| SkScalar radius = SkRRectPriv::GetSimpleRadii(rrect).fX; |
| SkScalar matrixFactor = viewMatrix[SkMatrix::kMScaleX] + viewMatrix[SkMatrix::kMSkewX]; |
| SkScalar scaledRadius = SkScalarAbs(radius*matrixFactor); |
| SkScalar scaledInsetWidth = SkScalarAbs(insetWidth*matrixFactor); |
| |
| if (scaledInsetWidth <= 0) { |
| return nullptr; |
| } |
| |
| GrOpMemoryPool* pool = context->priv().opMemoryPool(); |
| |
| return pool->allocate<ShadowCircularRRectOp>(color, bounds, |
| scaledRadius, |
| rrect.isOval(), |
| blurWidth, |
| scaledInsetWidth, |
| std::move(falloffView)); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #if GR_TEST_UTILS |
| |
| GR_DRAW_OP_TEST_DEFINE(ShadowRRectOp) { |
| // We may choose matrix and inset values that cause the factory to fail. We loop until we find |
| // an acceptable combination. |
| do { |
| // create a similarity matrix |
| SkScalar rotate = random->nextSScalar1() * 360.f; |
| SkScalar translateX = random->nextSScalar1() * 1000.f; |
| SkScalar translateY = random->nextSScalar1() * 1000.f; |
| SkScalar scale = random->nextSScalar1() * 100.f; |
| SkMatrix viewMatrix; |
| viewMatrix.setRotate(rotate); |
| viewMatrix.postTranslate(translateX, translateY); |
| viewMatrix.postScale(scale, scale); |
| SkScalar insetWidth = random->nextSScalar1() * 72.f; |
| SkScalar blurWidth = random->nextSScalar1() * 72.f; |
| bool isCircle = random->nextBool(); |
| // This op doesn't use a full GrPaint, just a color. |
| GrColor color = paint.getColor4f().toBytes_RGBA(); |
| if (isCircle) { |
| SkRect circle = GrTest::TestSquare(random); |
| SkRRect rrect = SkRRect::MakeOval(circle); |
| if (auto op = GrShadowRRectOp::Make( |
| context, color, viewMatrix, rrect, blurWidth, insetWidth)) { |
| return op; |
| } |
| } else { |
| SkRRect rrect; |
| do { |
| // This may return a rrect with elliptical corners, which will cause an assert. |
| rrect = GrTest::TestRRectSimple(random); |
| } while (!SkRRectPriv::IsSimpleCircular(rrect)); |
| if (auto op = GrShadowRRectOp::Make( |
| context, color, viewMatrix, rrect, blurWidth, insetWidth)) { |
| return op; |
| } |
| } |
| } while (true); |
| } |
| |
| #endif |