| /* | |
| * Copyright 2014 Google Inc. | |
| * | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #include "GrDashOp.h" | |
| #include "GrAppliedClip.h" | |
| #include "GrCaps.h" | |
| #include "GrCoordTransform.h" | |
| #include "GrDefaultGeoProcFactory.h" | |
| #include "GrDrawOpTest.h" | |
| #include "GrGeometryProcessor.h" | |
| #include "GrMemoryPool.h" | |
| #include "GrOpFlushState.h" | |
| #include "GrProcessor.h" | |
| #include "GrQuad.h" | |
| #include "GrRecordingContext.h" | |
| #include "GrRecordingContextPriv.h" | |
| #include "GrStyle.h" | |
| #include "GrVertexWriter.h" | |
| #include "SkGr.h" | |
| #include "SkMatrixPriv.h" | |
| #include "SkPointPriv.h" | |
| #include "glsl/GrGLSLFragmentShaderBuilder.h" | |
| #include "glsl/GrGLSLGeometryProcessor.h" | |
| #include "glsl/GrGLSLProgramDataManager.h" | |
| #include "glsl/GrGLSLUniformHandler.h" | |
| #include "glsl/GrGLSLVarying.h" | |
| #include "glsl/GrGLSLVertexGeoBuilder.h" | |
| #include "ops/GrMeshDrawOp.h" | |
| using AAMode = GrDashOp::AAMode; | |
| /////////////////////////////////////////////////////////////////////////////// | |
| // Returns whether or not the gpu can fast path the dash line effect. | |
| bool GrDashOp::CanDrawDashLine(const SkPoint pts[2], const GrStyle& style, | |
| const SkMatrix& viewMatrix) { | |
| // Pts must be either horizontal or vertical in src space | |
| if (pts[0].fX != pts[1].fX && pts[0].fY != pts[1].fY) { | |
| return false; | |
| } | |
| // May be able to relax this to include skew. As of now cannot do perspective | |
| // because of the non uniform scaling of bloating a rect | |
| if (!viewMatrix.preservesRightAngles()) { | |
| return false; | |
| } | |
| if (!style.isDashed() || 2 != style.dashIntervalCnt()) { | |
| return false; | |
| } | |
| const SkScalar* intervals = style.dashIntervals(); | |
| if (0 == intervals[0] && 0 == intervals[1]) { | |
| return false; | |
| } | |
| SkPaint::Cap cap = style.strokeRec().getCap(); | |
| if (SkPaint::kRound_Cap == cap) { | |
| // Current we don't support round caps unless the on interval is zero | |
| if (intervals[0] != 0.f) { | |
| return false; | |
| } | |
| // If the width of the circle caps in greater than the off interval we will pick up unwanted | |
| // segments of circles at the start and end of the dash line. | |
| if (style.strokeRec().getWidth() > intervals[1]) { | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| static void calc_dash_scaling(SkScalar* parallelScale, SkScalar* perpScale, | |
| const SkMatrix& viewMatrix, const SkPoint pts[2]) { | |
| SkVector vecSrc = pts[1] - pts[0]; | |
| if (pts[1] == pts[0]) { | |
| vecSrc.set(1.0, 0.0); | |
| } | |
| SkScalar magSrc = vecSrc.length(); | |
| SkScalar invSrc = magSrc ? SkScalarInvert(magSrc) : 0; | |
| vecSrc.scale(invSrc); | |
| SkVector vecSrcPerp; | |
| SkPointPriv::RotateCW(vecSrc, &vecSrcPerp); | |
| viewMatrix.mapVectors(&vecSrc, 1); | |
| viewMatrix.mapVectors(&vecSrcPerp, 1); | |
| // parallelScale tells how much to scale along the line parallel to the dash line | |
| // perpScale tells how much to scale in the direction perpendicular to the dash line | |
| *parallelScale = vecSrc.length(); | |
| *perpScale = vecSrcPerp.length(); | |
| } | |
| // calculates the rotation needed to aligned pts to the x axis with pts[0] < pts[1] | |
| // Stores the rotation matrix in rotMatrix, and the mapped points in ptsRot | |
| static void align_to_x_axis(const SkPoint pts[2], SkMatrix* rotMatrix, SkPoint ptsRot[2] = nullptr) { | |
| SkVector vec = pts[1] - pts[0]; | |
| if (pts[1] == pts[0]) { | |
| vec.set(1.0, 0.0); | |
| } | |
| SkScalar mag = vec.length(); | |
| SkScalar inv = mag ? SkScalarInvert(mag) : 0; | |
| vec.scale(inv); | |
| rotMatrix->setSinCos(-vec.fY, vec.fX, pts[0].fX, pts[0].fY); | |
| if (ptsRot) { | |
| rotMatrix->mapPoints(ptsRot, pts, 2); | |
| // correction for numerical issues if map doesn't make ptsRot exactly horizontal | |
| ptsRot[1].fY = pts[0].fY; | |
| } | |
| } | |
| // Assumes phase < sum of all intervals | |
| static SkScalar calc_start_adjustment(const SkScalar intervals[2], SkScalar phase) { | |
| SkASSERT(phase < intervals[0] + intervals[1]); | |
| if (phase >= intervals[0] && phase != 0) { | |
| SkScalar srcIntervalLen = intervals[0] + intervals[1]; | |
| return srcIntervalLen - phase; | |
| } | |
| return 0; | |
| } | |
| static SkScalar calc_end_adjustment(const SkScalar intervals[2], const SkPoint pts[2], | |
| SkScalar phase, SkScalar* endingInt) { | |
| if (pts[1].fX <= pts[0].fX) { | |
| return 0; | |
| } | |
| SkScalar srcIntervalLen = intervals[0] + intervals[1]; | |
| SkScalar totalLen = pts[1].fX - pts[0].fX; | |
| SkScalar temp = totalLen / srcIntervalLen; | |
| SkScalar numFullIntervals = SkScalarFloorToScalar(temp); | |
| *endingInt = totalLen - numFullIntervals * srcIntervalLen + phase; | |
| temp = *endingInt / srcIntervalLen; | |
| *endingInt = *endingInt - SkScalarFloorToScalar(temp) * srcIntervalLen; | |
| if (0 == *endingInt) { | |
| *endingInt = srcIntervalLen; | |
| } | |
| if (*endingInt > intervals[0]) { | |
| return *endingInt - intervals[0]; | |
| } | |
| return 0; | |
| } | |
| enum DashCap { | |
| kRound_DashCap, | |
| kNonRound_DashCap, | |
| }; | |
| static void setup_dashed_rect(const SkRect& rect, GrVertexWriter& vertices, const SkMatrix& matrix, | |
| SkScalar offset, SkScalar bloatX, SkScalar bloatY, SkScalar len, | |
| SkScalar stroke, SkScalar startInterval, SkScalar endInterval, | |
| SkScalar strokeWidth, DashCap cap) { | |
| SkScalar intervalLength = startInterval + endInterval; | |
| SkRect dashRect = { offset - bloatX, -stroke - bloatY, | |
| offset + len + bloatX, stroke + bloatY }; | |
| if (kRound_DashCap == cap) { | |
| SkScalar radius = SkScalarHalf(strokeWidth) - 0.5f; | |
| SkScalar centerX = SkScalarHalf(endInterval); | |
| vertices.writeQuad(GrQuad::MakeFromRect(rect, matrix), | |
| GrVertexWriter::TriStripFromRect(dashRect), | |
| intervalLength, | |
| radius, | |
| centerX); | |
| } else { | |
| SkASSERT(kNonRound_DashCap == cap); | |
| SkScalar halfOffLen = SkScalarHalf(endInterval); | |
| SkScalar halfStroke = SkScalarHalf(strokeWidth); | |
| SkRect rectParam; | |
| rectParam.set(halfOffLen + 0.5f, -halfStroke + 0.5f, | |
| halfOffLen + startInterval - 0.5f, halfStroke - 0.5f); | |
| vertices.writeQuad(GrQuad::MakeFromRect(rect, matrix), | |
| GrVertexWriter::TriStripFromRect(dashRect), | |
| intervalLength, | |
| rectParam); | |
| } | |
| } | |
| /** | |
| * An GrGeometryProcessor that renders a dashed line. | |
| * This GrGeometryProcessor is meant for dashed lines that only have a single on/off interval pair. | |
| * Bounding geometry is rendered and the effect computes coverage based on the fragment's | |
| * position relative to the dashed line. | |
| */ | |
| static sk_sp<GrGeometryProcessor> make_dash_gp(const SkPMColor4f&, | |
| AAMode aaMode, | |
| DashCap cap, | |
| const SkMatrix& localMatrix, | |
| bool usesLocalCoords); | |
| class DashOp final : public GrMeshDrawOp { | |
| public: | |
| DEFINE_OP_CLASS_ID | |
| struct LineData { | |
| SkMatrix fViewMatrix; | |
| SkMatrix fSrcRotInv; | |
| SkPoint fPtsRot[2]; | |
| SkScalar fSrcStrokeWidth; | |
| SkScalar fPhase; | |
| SkScalar fIntervals[2]; | |
| SkScalar fParallelScale; | |
| SkScalar fPerpendicularScale; | |
| }; | |
| static std::unique_ptr<GrDrawOp> Make(GrRecordingContext* context, | |
| GrPaint&& paint, | |
| const LineData& geometry, | |
| SkPaint::Cap cap, | |
| AAMode aaMode, bool fullDash, | |
| const GrUserStencilSettings* stencilSettings) { | |
| GrOpMemoryPool* pool = context->priv().opMemoryPool(); | |
| return pool->allocate<DashOp>(std::move(paint), geometry, cap, | |
| aaMode, fullDash, stencilSettings); | |
| } | |
| const char* name() const override { return "DashOp"; } | |
| void visitProxies(const VisitProxyFunc& func, VisitorType) const override { | |
| fProcessorSet.visitProxies(func); | |
| } | |
| #ifdef SK_DEBUG | |
| SkString dumpInfo() const override { | |
| SkString string; | |
| for (const auto& geo : fLines) { | |
| string.appendf("Pt0: [%.2f, %.2f], Pt1: [%.2f, %.2f], Width: %.2f, Ival0: %.2f, " | |
| "Ival1 : %.2f, Phase: %.2f\n", | |
| geo.fPtsRot[0].fX, geo.fPtsRot[0].fY, | |
| geo.fPtsRot[1].fX, geo.fPtsRot[1].fY, | |
| geo.fSrcStrokeWidth, | |
| geo.fIntervals[0], | |
| geo.fIntervals[1], | |
| geo.fPhase); | |
| } | |
| string += fProcessorSet.dumpProcessors(); | |
| string += INHERITED::dumpInfo(); | |
| return string; | |
| } | |
| #endif | |
| FixedFunctionFlags fixedFunctionFlags() const override { | |
| FixedFunctionFlags flags = FixedFunctionFlags::kNone; | |
| if (AAMode::kCoverageWithMSAA == fAAMode) { | |
| flags |= FixedFunctionFlags::kUsesHWAA; | |
| } | |
| if (fStencilSettings != &GrUserStencilSettings::kUnused) { | |
| flags |= FixedFunctionFlags::kUsesStencil; | |
| } | |
| return flags; | |
| } | |
| GrProcessorSet::Analysis finalize( | |
| const GrCaps& caps, const GrAppliedClip* clip, GrFSAAType fsaaType, | |
| GrClampType clampType) override { | |
| GrProcessorAnalysisCoverage coverage; | |
| if (AAMode::kNone == fAAMode && !clip->numClipCoverageFragmentProcessors()) { | |
| coverage = GrProcessorAnalysisCoverage::kNone; | |
| } else { | |
| coverage = GrProcessorAnalysisCoverage::kSingleChannel; | |
| } | |
| auto analysis = fProcessorSet.finalize( | |
| fColor, coverage, clip, fStencilSettings, fsaaType, caps, clampType, &fColor); | |
| fUsesLocalCoords = analysis.usesLocalCoords(); | |
| return analysis; | |
| } | |
| private: | |
| friend class GrOpMemoryPool; // for ctor | |
| DashOp(GrPaint&& paint, const LineData& geometry, SkPaint::Cap cap, AAMode aaMode, | |
| bool fullDash, const GrUserStencilSettings* stencilSettings) | |
| : INHERITED(ClassID()) | |
| , fColor(paint.getColor4f()) | |
| , fFullDash(fullDash) | |
| , fCap(cap) | |
| , fAAMode(aaMode) | |
| , fProcessorSet(std::move(paint)) | |
| , fStencilSettings(stencilSettings) { | |
| fLines.push_back(geometry); | |
| // compute bounds | |
| SkScalar halfStrokeWidth = 0.5f * geometry.fSrcStrokeWidth; | |
| SkScalar xBloat = SkPaint::kButt_Cap == cap ? 0 : halfStrokeWidth; | |
| SkRect bounds; | |
| bounds.set(geometry.fPtsRot[0], geometry.fPtsRot[1]); | |
| bounds.outset(xBloat, halfStrokeWidth); | |
| // Note, we actually create the combined matrix here, and save the work | |
| SkMatrix& combinedMatrix = fLines[0].fSrcRotInv; | |
| combinedMatrix.postConcat(geometry.fViewMatrix); | |
| IsZeroArea zeroArea = geometry.fSrcStrokeWidth ? IsZeroArea::kNo : IsZeroArea::kYes; | |
| HasAABloat aaBloat = (aaMode == AAMode::kNone) ? HasAABloat ::kNo : HasAABloat::kYes; | |
| this->setTransformedBounds(bounds, combinedMatrix, aaBloat, zeroArea); | |
| } | |
| struct DashDraw { | |
| DashDraw(const LineData& geo) { | |
| memcpy(fPtsRot, geo.fPtsRot, sizeof(geo.fPtsRot)); | |
| memcpy(fIntervals, geo.fIntervals, sizeof(geo.fIntervals)); | |
| fPhase = geo.fPhase; | |
| } | |
| SkPoint fPtsRot[2]; | |
| SkScalar fIntervals[2]; | |
| SkScalar fPhase; | |
| SkScalar fStartOffset; | |
| SkScalar fStrokeWidth; | |
| SkScalar fLineLength; | |
| SkScalar fHalfDevStroke; | |
| SkScalar fDevBloatX; | |
| SkScalar fDevBloatY; | |
| bool fLineDone; | |
| bool fHasStartRect; | |
| bool fHasEndRect; | |
| }; | |
| void onPrepareDraws(Target* target) override { | |
| int instanceCount = fLines.count(); | |
| SkPaint::Cap cap = this->cap(); | |
| bool isRoundCap = SkPaint::kRound_Cap == cap; | |
| DashCap capType = isRoundCap ? kRound_DashCap : kNonRound_DashCap; | |
| sk_sp<GrGeometryProcessor> gp; | |
| if (this->fullDash()) { | |
| gp = make_dash_gp(this->color(), this->aaMode(), capType, this->viewMatrix(), | |
| fUsesLocalCoords); | |
| } else { | |
| // Set up the vertex data for the line and start/end dashes | |
| using namespace GrDefaultGeoProcFactory; | |
| Color color(this->color()); | |
| LocalCoords::Type localCoordsType = | |
| fUsesLocalCoords ? LocalCoords::kUsePosition_Type : LocalCoords::kUnused_Type; | |
| gp = MakeForDeviceSpace(target->caps().shaderCaps(), | |
| color, | |
| Coverage::kSolid_Type, | |
| localCoordsType, | |
| this->viewMatrix()); | |
| } | |
| if (!gp) { | |
| SkDebugf("Could not create GrGeometryProcessor\n"); | |
| return; | |
| } | |
| // useAA here means Edge AA or MSAA | |
| bool useAA = this->aaMode() != AAMode::kNone; | |
| bool fullDash = this->fullDash(); | |
| // We do two passes over all of the dashes. First we setup the start, end, and bounds, | |
| // rectangles. We preserve all of this work in the rects / draws arrays below. Then we | |
| // iterate again over these decomposed dashes to generate vertices | |
| static const int kNumStackDashes = 128; | |
| SkSTArray<kNumStackDashes, SkRect, true> rects; | |
| SkSTArray<kNumStackDashes, DashDraw, true> draws; | |
| int totalRectCount = 0; | |
| int rectOffset = 0; | |
| rects.push_back_n(3 * instanceCount); | |
| for (int i = 0; i < instanceCount; i++) { | |
| const LineData& args = fLines[i]; | |
| DashDraw& draw = draws.push_back(args); | |
| bool hasCap = SkPaint::kButt_Cap != cap; | |
| // We always want to at least stroke out half a pixel on each side in device space | |
| // so 0.5f / perpScale gives us this min in src space | |
| SkScalar halfSrcStroke = | |
| SkMaxScalar(args.fSrcStrokeWidth * 0.5f, 0.5f / args.fPerpendicularScale); | |
| SkScalar strokeAdj; | |
| if (!hasCap) { | |
| strokeAdj = 0.f; | |
| } else { | |
| strokeAdj = halfSrcStroke; | |
| } | |
| SkScalar startAdj = 0; | |
| bool lineDone = false; | |
| // Too simplify the algorithm, we always push back rects for start and end rect. | |
| // Otherwise we'd have to track start / end rects for each individual geometry | |
| SkRect& bounds = rects[rectOffset++]; | |
| SkRect& startRect = rects[rectOffset++]; | |
| SkRect& endRect = rects[rectOffset++]; | |
| bool hasStartRect = false; | |
| // If we are using AA, check to see if we are drawing a partial dash at the start. If so | |
| // draw it separately here and adjust our start point accordingly | |
| if (useAA) { | |
| if (draw.fPhase > 0 && draw.fPhase < draw.fIntervals[0]) { | |
| SkPoint startPts[2]; | |
| startPts[0] = draw.fPtsRot[0]; | |
| startPts[1].fY = startPts[0].fY; | |
| startPts[1].fX = SkMinScalar(startPts[0].fX + draw.fIntervals[0] - draw.fPhase, | |
| draw.fPtsRot[1].fX); | |
| startRect.set(startPts, 2); | |
| startRect.outset(strokeAdj, halfSrcStroke); | |
| hasStartRect = true; | |
| startAdj = draw.fIntervals[0] + draw.fIntervals[1] - draw.fPhase; | |
| } | |
| } | |
| // adjustments for start and end of bounding rect so we only draw dash intervals | |
| // contained in the original line segment. | |
| startAdj += calc_start_adjustment(draw.fIntervals, draw.fPhase); | |
| if (startAdj != 0) { | |
| draw.fPtsRot[0].fX += startAdj; | |
| draw.fPhase = 0; | |
| } | |
| SkScalar endingInterval = 0; | |
| SkScalar endAdj = calc_end_adjustment(draw.fIntervals, draw.fPtsRot, draw.fPhase, | |
| &endingInterval); | |
| draw.fPtsRot[1].fX -= endAdj; | |
| if (draw.fPtsRot[0].fX >= draw.fPtsRot[1].fX) { | |
| lineDone = true; | |
| } | |
| bool hasEndRect = false; | |
| // If we are using AA, check to see if we are drawing a partial dash at then end. If so | |
| // draw it separately here and adjust our end point accordingly | |
| if (useAA && !lineDone) { | |
| // If we adjusted the end then we will not be drawing a partial dash at the end. | |
| // If we didn't adjust the end point then we just need to make sure the ending | |
| // dash isn't a full dash | |
| if (0 == endAdj && endingInterval != draw.fIntervals[0]) { | |
| SkPoint endPts[2]; | |
| endPts[1] = draw.fPtsRot[1]; | |
| endPts[0].fY = endPts[1].fY; | |
| endPts[0].fX = endPts[1].fX - endingInterval; | |
| endRect.set(endPts, 2); | |
| endRect.outset(strokeAdj, halfSrcStroke); | |
| hasEndRect = true; | |
| endAdj = endingInterval + draw.fIntervals[1]; | |
| draw.fPtsRot[1].fX -= endAdj; | |
| if (draw.fPtsRot[0].fX >= draw.fPtsRot[1].fX) { | |
| lineDone = true; | |
| } | |
| } | |
| } | |
| if (draw.fPtsRot[0].fX == draw.fPtsRot[1].fX && | |
| (0 != endAdj || 0 == startAdj) && | |
| hasCap) { | |
| // At this point the fPtsRot[0]/[1] represent the start and end of the inner rect of | |
| // dashes that we want to draw. The only way they can be equal is if the on interval | |
| // is zero (or an edge case if the end of line ends at a full off interval, but this | |
| // is handled as well). Thus if the on interval is zero then we need to draw a cap | |
| // at this position if the stroke has caps. The spec says we only draw this point if | |
| // point lies between [start of line, end of line). Thus we check if we are at the | |
| // end (but not the start), and if so we don't draw the cap. | |
| lineDone = false; | |
| } | |
| if (startAdj != 0) { | |
| draw.fPhase = 0; | |
| } | |
| // Change the dashing info from src space into device space | |
| SkScalar* devIntervals = draw.fIntervals; | |
| devIntervals[0] = draw.fIntervals[0] * args.fParallelScale; | |
| devIntervals[1] = draw.fIntervals[1] * args.fParallelScale; | |
| SkScalar devPhase = draw.fPhase * args.fParallelScale; | |
| SkScalar strokeWidth = args.fSrcStrokeWidth * args.fPerpendicularScale; | |
| if ((strokeWidth < 1.f && useAA) || 0.f == strokeWidth) { | |
| strokeWidth = 1.f; | |
| } | |
| SkScalar halfDevStroke = strokeWidth * 0.5f; | |
| if (SkPaint::kSquare_Cap == cap) { | |
| // add cap to on interval and remove from off interval | |
| devIntervals[0] += strokeWidth; | |
| devIntervals[1] -= strokeWidth; | |
| } | |
| SkScalar startOffset = devIntervals[1] * 0.5f + devPhase; | |
| // For EdgeAA, we bloat in X & Y for both square and round caps. | |
| // For MSAA, we don't bloat at all for square caps, and bloat in Y only for round caps. | |
| SkScalar devBloatX = this->aaMode() == AAMode::kCoverage ? 0.5f : 0.0f; | |
| SkScalar devBloatY; | |
| if (SkPaint::kRound_Cap == cap && this->aaMode() == AAMode::kCoverageWithMSAA) { | |
| devBloatY = 0.5f; | |
| } else { | |
| devBloatY = devBloatX; | |
| } | |
| SkScalar bloatX = devBloatX / args.fParallelScale; | |
| SkScalar bloatY = devBloatY / args.fPerpendicularScale; | |
| if (devIntervals[1] <= 0.f && useAA) { | |
| // Case when we end up drawing a solid AA rect | |
| // Reset the start rect to draw this single solid rect | |
| // but it requires to upload a new intervals uniform so we can mimic | |
| // one giant dash | |
| draw.fPtsRot[0].fX -= hasStartRect ? startAdj : 0; | |
| draw.fPtsRot[1].fX += hasEndRect ? endAdj : 0; | |
| startRect.set(draw.fPtsRot, 2); | |
| startRect.outset(strokeAdj, halfSrcStroke); | |
| hasStartRect = true; | |
| hasEndRect = false; | |
| lineDone = true; | |
| SkPoint devicePts[2]; | |
| args.fViewMatrix.mapPoints(devicePts, draw.fPtsRot, 2); | |
| SkScalar lineLength = SkPoint::Distance(devicePts[0], devicePts[1]); | |
| if (hasCap) { | |
| lineLength += 2.f * halfDevStroke; | |
| } | |
| devIntervals[0] = lineLength; | |
| } | |
| totalRectCount += !lineDone ? 1 : 0; | |
| totalRectCount += hasStartRect ? 1 : 0; | |
| totalRectCount += hasEndRect ? 1 : 0; | |
| if (SkPaint::kRound_Cap == cap && 0 != args.fSrcStrokeWidth) { | |
| // need to adjust this for round caps to correctly set the dashPos attrib on | |
| // vertices | |
| startOffset -= halfDevStroke; | |
| } | |
| if (!lineDone) { | |
| SkPoint devicePts[2]; | |
| args.fViewMatrix.mapPoints(devicePts, draw.fPtsRot, 2); | |
| draw.fLineLength = SkPoint::Distance(devicePts[0], devicePts[1]); | |
| if (hasCap) { | |
| draw.fLineLength += 2.f * halfDevStroke; | |
| } | |
| bounds.set(draw.fPtsRot[0].fX, draw.fPtsRot[0].fY, | |
| draw.fPtsRot[1].fX, draw.fPtsRot[1].fY); | |
| bounds.outset(bloatX + strokeAdj, bloatY + halfSrcStroke); | |
| } | |
| if (hasStartRect) { | |
| SkASSERT(useAA); // so that we know bloatX and bloatY have been set | |
| startRect.outset(bloatX, bloatY); | |
| } | |
| if (hasEndRect) { | |
| SkASSERT(useAA); // so that we know bloatX and bloatY have been set | |
| endRect.outset(bloatX, bloatY); | |
| } | |
| draw.fStartOffset = startOffset; | |
| draw.fDevBloatX = devBloatX; | |
| draw.fDevBloatY = devBloatY; | |
| draw.fHalfDevStroke = halfDevStroke; | |
| draw.fStrokeWidth = strokeWidth; | |
| draw.fHasStartRect = hasStartRect; | |
| draw.fLineDone = lineDone; | |
| draw.fHasEndRect = hasEndRect; | |
| } | |
| if (!totalRectCount) { | |
| return; | |
| } | |
| QuadHelper helper(target, gp->vertexStride(), totalRectCount); | |
| GrVertexWriter vertices{ helper.vertices() }; | |
| if (!vertices.fPtr) { | |
| return; | |
| } | |
| int rectIndex = 0; | |
| for (int i = 0; i < instanceCount; i++) { | |
| const LineData& geom = fLines[i]; | |
| if (!draws[i].fLineDone) { | |
| if (fullDash) { | |
| setup_dashed_rect( | |
| rects[rectIndex], vertices, geom.fSrcRotInv, | |
| draws[i].fStartOffset, draws[i].fDevBloatX, draws[i].fDevBloatY, | |
| draws[i].fLineLength, draws[i].fHalfDevStroke, draws[i].fIntervals[0], | |
| draws[i].fIntervals[1], draws[i].fStrokeWidth, capType); | |
| } else { | |
| vertices.writeQuad(GrQuad::MakeFromRect(rects[rectIndex], geom.fSrcRotInv)); | |
| } | |
| } | |
| rectIndex++; | |
| if (draws[i].fHasStartRect) { | |
| if (fullDash) { | |
| setup_dashed_rect( | |
| rects[rectIndex], vertices, geom.fSrcRotInv, | |
| draws[i].fStartOffset, draws[i].fDevBloatX, draws[i].fDevBloatY, | |
| draws[i].fIntervals[0], draws[i].fHalfDevStroke, draws[i].fIntervals[0], | |
| draws[i].fIntervals[1], draws[i].fStrokeWidth, capType); | |
| } else { | |
| vertices.writeQuad(GrQuad::MakeFromRect(rects[rectIndex], geom.fSrcRotInv)); | |
| } | |
| } | |
| rectIndex++; | |
| if (draws[i].fHasEndRect) { | |
| if (fullDash) { | |
| setup_dashed_rect( | |
| rects[rectIndex], vertices, geom.fSrcRotInv, | |
| draws[i].fStartOffset, draws[i].fDevBloatX, draws[i].fDevBloatY, | |
| draws[i].fIntervals[0], draws[i].fHalfDevStroke, draws[i].fIntervals[0], | |
| draws[i].fIntervals[1], draws[i].fStrokeWidth, capType); | |
| } else { | |
| vertices.writeQuad(GrQuad::MakeFromRect(rects[rectIndex], geom.fSrcRotInv)); | |
| } | |
| } | |
| rectIndex++; | |
| } | |
| helper.recordDraw(target, std::move(gp)); | |
| } | |
| void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override { | |
| auto pipelineFlags = GrPipeline::InputFlags::kNone; | |
| if (AAMode::kCoverageWithMSAA == fAAMode) { | |
| pipelineFlags |= GrPipeline::InputFlags::kHWAntialias; | |
| } | |
| flushState->executeDrawsAndUploadsForMeshDrawOp( | |
| this, chainBounds, std::move(fProcessorSet), pipelineFlags, fStencilSettings); | |
| } | |
| CombineResult onCombineIfPossible(GrOp* t, const GrCaps& caps) override { | |
| DashOp* that = t->cast<DashOp>(); | |
| if (fProcessorSet != that->fProcessorSet) { | |
| return CombineResult::kCannotCombine; | |
| } | |
| if (this->aaMode() != that->aaMode()) { | |
| return CombineResult::kCannotCombine; | |
| } | |
| if (this->fullDash() != that->fullDash()) { | |
| return CombineResult::kCannotCombine; | |
| } | |
| if (this->cap() != that->cap()) { | |
| return CombineResult::kCannotCombine; | |
| } | |
| // TODO vertex color | |
| if (this->color() != that->color()) { | |
| return CombineResult::kCannotCombine; | |
| } | |
| if (fUsesLocalCoords && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) { | |
| return CombineResult::kCannotCombine; | |
| } | |
| fLines.push_back_n(that->fLines.count(), that->fLines.begin()); | |
| return CombineResult::kMerged; | |
| } | |
| const SkPMColor4f& color() const { return fColor; } | |
| const SkMatrix& viewMatrix() const { return fLines[0].fViewMatrix; } | |
| AAMode aaMode() const { return fAAMode; } | |
| bool fullDash() const { return fFullDash; } | |
| SkPaint::Cap cap() const { return fCap; } | |
| static const int kVertsPerDash = 4; | |
| static const int kIndicesPerDash = 6; | |
| SkSTArray<1, LineData, true> fLines; | |
| SkPMColor4f fColor; | |
| bool fUsesLocalCoords : 1; | |
| bool fFullDash : 1; | |
| // We use 3 bits for this 3-value enum because MSVS makes the underlying types signed. | |
| SkPaint::Cap fCap : 3; | |
| AAMode fAAMode; | |
| GrProcessorSet fProcessorSet; | |
| const GrUserStencilSettings* fStencilSettings; | |
| typedef GrMeshDrawOp INHERITED; | |
| }; | |
| std::unique_ptr<GrDrawOp> GrDashOp::MakeDashLineOp(GrRecordingContext* context, | |
| GrPaint&& paint, | |
| const SkMatrix& viewMatrix, | |
| const SkPoint pts[2], | |
| AAMode aaMode, | |
| const GrStyle& style, | |
| const GrUserStencilSettings* stencilSettings) { | |
| SkASSERT(GrDashOp::CanDrawDashLine(pts, style, viewMatrix)); | |
| const SkScalar* intervals = style.dashIntervals(); | |
| SkScalar phase = style.dashPhase(); | |
| SkPaint::Cap cap = style.strokeRec().getCap(); | |
| DashOp::LineData lineData; | |
| lineData.fSrcStrokeWidth = style.strokeRec().getWidth(); | |
| // the phase should be normalized to be [0, sum of all intervals) | |
| SkASSERT(phase >= 0 && phase < intervals[0] + intervals[1]); | |
| // Rotate the src pts so they are aligned horizontally with pts[0].fX < pts[1].fX | |
| if (pts[0].fY != pts[1].fY || pts[0].fX > pts[1].fX) { | |
| SkMatrix rotMatrix; | |
| align_to_x_axis(pts, &rotMatrix, lineData.fPtsRot); | |
| if (!rotMatrix.invert(&lineData.fSrcRotInv)) { | |
| SkDebugf("Failed to create invertible rotation matrix!\n"); | |
| return nullptr; | |
| } | |
| } else { | |
| lineData.fSrcRotInv.reset(); | |
| memcpy(lineData.fPtsRot, pts, 2 * sizeof(SkPoint)); | |
| } | |
| // Scale corrections of intervals and stroke from view matrix | |
| calc_dash_scaling(&lineData.fParallelScale, &lineData.fPerpendicularScale, viewMatrix, | |
| lineData.fPtsRot); | |
| if (SkScalarNearlyZero(lineData.fParallelScale) || | |
| SkScalarNearlyZero(lineData.fPerpendicularScale)) { | |
| return nullptr; | |
| } | |
| SkScalar offInterval = intervals[1] * lineData.fParallelScale; | |
| SkScalar strokeWidth = lineData.fSrcStrokeWidth * lineData.fPerpendicularScale; | |
| if (SkPaint::kSquare_Cap == cap && 0 != lineData.fSrcStrokeWidth) { | |
| // add cap to on interveal and remove from off interval | |
| offInterval -= strokeWidth; | |
| } | |
| // TODO we can do a real rect call if not using fulldash(ie no off interval, not using AA) | |
| bool fullDash = offInterval > 0.f || aaMode != AAMode::kNone; | |
| lineData.fViewMatrix = viewMatrix; | |
| lineData.fPhase = phase; | |
| lineData.fIntervals[0] = intervals[0]; | |
| lineData.fIntervals[1] = intervals[1]; | |
| return DashOp::Make(context, std::move(paint), lineData, cap, aaMode, fullDash, | |
| stencilSettings); | |
| } | |
| ////////////////////////////////////////////////////////////////////////////// | |
| class GLDashingCircleEffect; | |
| /* | |
| * This effect will draw a dotted line (defined as a dashed lined with round caps and no on | |
| * interval). The radius of the dots is given by the strokeWidth and the spacing by the DashInfo. | |
| * Both of the previous two parameters are in device space. This effect also requires the setting of | |
| * a float2 vertex attribute for the the four corners of the bounding rect. This attribute is the | |
| * "dash position" of each vertex. In other words it is the vertex coords (in device space) if we | |
| * transform the line to be horizontal, with the start of line at the origin then shifted to the | |
| * right by half the off interval. The line then goes in the positive x direction. | |
| */ | |
| class DashingCircleEffect : public GrGeometryProcessor { | |
| public: | |
| typedef SkPathEffect::DashInfo DashInfo; | |
| static sk_sp<GrGeometryProcessor> Make(const SkPMColor4f&, | |
| AAMode aaMode, | |
| const SkMatrix& localMatrix, | |
| bool usesLocalCoords); | |
| const char* name() const override { return "DashingCircleEffect"; } | |
| AAMode aaMode() const { return fAAMode; } | |
| const SkPMColor4f& color() const { return fColor; } | |
| const SkMatrix& localMatrix() const { return fLocalMatrix; } | |
| bool usesLocalCoords() const { return fUsesLocalCoords; } | |
| void getGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const override; | |
| GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const override; | |
| private: | |
| DashingCircleEffect(const SkPMColor4f&, AAMode aaMode, const SkMatrix& localMatrix, | |
| bool usesLocalCoords); | |
| SkPMColor4f fColor; | |
| SkMatrix fLocalMatrix; | |
| bool fUsesLocalCoords; | |
| AAMode fAAMode; | |
| Attribute fInPosition; | |
| Attribute fInDashParams; | |
| Attribute fInCircleParams; | |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST | |
| friend class GLDashingCircleEffect; | |
| typedef GrGeometryProcessor INHERITED; | |
| }; | |
| ////////////////////////////////////////////////////////////////////////////// | |
| class GLDashingCircleEffect : public GrGLSLGeometryProcessor { | |
| public: | |
| GLDashingCircleEffect(); | |
| void onEmitCode(EmitArgs&, GrGPArgs*) override; | |
| static inline void GenKey(const GrGeometryProcessor&, | |
| const GrShaderCaps&, | |
| GrProcessorKeyBuilder*); | |
| void setData(const GrGLSLProgramDataManager&, const GrPrimitiveProcessor&, | |
| FPCoordTransformIter&& transformIter) override; | |
| private: | |
| UniformHandle fParamUniform; | |
| UniformHandle fColorUniform; | |
| SkPMColor4f fColor; | |
| SkScalar fPrevRadius; | |
| SkScalar fPrevCenterX; | |
| SkScalar fPrevIntervalLength; | |
| typedef GrGLSLGeometryProcessor INHERITED; | |
| }; | |
| GLDashingCircleEffect::GLDashingCircleEffect() { | |
| fColor = SK_PMColor4fILLEGAL; | |
| fPrevRadius = SK_ScalarMin; | |
| fPrevCenterX = SK_ScalarMin; | |
| fPrevIntervalLength = SK_ScalarMax; | |
| } | |
| void GLDashingCircleEffect::onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) { | |
| const DashingCircleEffect& dce = args.fGP.cast<DashingCircleEffect>(); | |
| GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder; | |
| GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; | |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; | |
| // emit attributes | |
| varyingHandler->emitAttributes(dce); | |
| // XY are dashPos, Z is dashInterval | |
| GrGLSLVarying dashParams(kHalf3_GrSLType); | |
| varyingHandler->addVarying("DashParam", &dashParams); | |
| vertBuilder->codeAppendf("%s = %s;", dashParams.vsOut(), dce.fInDashParams.name()); | |
| // x refers to circle radius - 0.5, y refers to cicle's center x coord | |
| GrGLSLVarying circleParams(kHalf2_GrSLType); | |
| varyingHandler->addVarying("CircleParams", &circleParams); | |
| vertBuilder->codeAppendf("%s = %s;", circleParams.vsOut(), dce.fInCircleParams.name()); | |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; | |
| // Setup pass through color | |
| this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform); | |
| // Setup position | |
| this->writeOutputPosition(vertBuilder, gpArgs, dce.fInPosition.name()); | |
| // emit transforms | |
| this->emitTransforms(vertBuilder, | |
| varyingHandler, | |
| uniformHandler, | |
| dce.fInPosition.asShaderVar(), | |
| dce.localMatrix(), | |
| args.fFPCoordTransformHandler); | |
| // transforms all points so that we can compare them to our test circle | |
| fragBuilder->codeAppendf("half xShifted = half(%s.x - floor(%s.x / %s.z) * %s.z);", | |
| dashParams.fsIn(), dashParams.fsIn(), dashParams.fsIn(), | |
| dashParams.fsIn()); | |
| fragBuilder->codeAppendf("half2 fragPosShifted = half2(xShifted, half(%s.y));", | |
| dashParams.fsIn()); | |
| fragBuilder->codeAppendf("half2 center = half2(%s.y, 0.0);", circleParams.fsIn()); | |
| fragBuilder->codeAppend("half dist = length(center - fragPosShifted);"); | |
| if (dce.aaMode() != AAMode::kNone) { | |
| fragBuilder->codeAppendf("half diff = dist - %s.x;", circleParams.fsIn()); | |
| fragBuilder->codeAppend("diff = 1.0 - diff;"); | |
| fragBuilder->codeAppend("half alpha = saturate(diff);"); | |
| } else { | |
| fragBuilder->codeAppendf("half alpha = 1.0;"); | |
| fragBuilder->codeAppendf("alpha *= dist < %s.x + 0.5 ? 1.0 : 0.0;", circleParams.fsIn()); | |
| } | |
| fragBuilder->codeAppendf("%s = half4(alpha);", args.fOutputCoverage); | |
| } | |
| void GLDashingCircleEffect::setData(const GrGLSLProgramDataManager& pdman, | |
| const GrPrimitiveProcessor& processor, | |
| FPCoordTransformIter&& transformIter) { | |
| const DashingCircleEffect& dce = processor.cast<DashingCircleEffect>(); | |
| if (dce.color() != fColor) { | |
| pdman.set4fv(fColorUniform, 1, dce.color().vec()); | |
| fColor = dce.color(); | |
| } | |
| this->setTransformDataHelper(dce.localMatrix(), pdman, &transformIter); | |
| } | |
| void GLDashingCircleEffect::GenKey(const GrGeometryProcessor& gp, | |
| const GrShaderCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const DashingCircleEffect& dce = gp.cast<DashingCircleEffect>(); | |
| uint32_t key = 0; | |
| key |= dce.usesLocalCoords() && dce.localMatrix().hasPerspective() ? 0x1 : 0x0; | |
| key |= static_cast<uint32_t>(dce.aaMode()) << 1; | |
| b->add32(key); | |
| } | |
| ////////////////////////////////////////////////////////////////////////////// | |
| sk_sp<GrGeometryProcessor> DashingCircleEffect::Make(const SkPMColor4f& color, | |
| AAMode aaMode, | |
| const SkMatrix& localMatrix, | |
| bool usesLocalCoords) { | |
| return sk_sp<GrGeometryProcessor>( | |
| new DashingCircleEffect(color, aaMode, localMatrix, usesLocalCoords)); | |
| } | |
| void DashingCircleEffect::getGLSLProcessorKey(const GrShaderCaps& caps, | |
| GrProcessorKeyBuilder* b) const { | |
| GLDashingCircleEffect::GenKey(*this, caps, b); | |
| } | |
| GrGLSLPrimitiveProcessor* DashingCircleEffect::createGLSLInstance(const GrShaderCaps&) const { | |
| return new GLDashingCircleEffect(); | |
| } | |
| DashingCircleEffect::DashingCircleEffect(const SkPMColor4f& color, | |
| AAMode aaMode, | |
| const SkMatrix& localMatrix, | |
| bool usesLocalCoords) | |
| : INHERITED(kDashingCircleEffect_ClassID) | |
| , fColor(color) | |
| , fLocalMatrix(localMatrix) | |
| , fUsesLocalCoords(usesLocalCoords) | |
| , fAAMode(aaMode) { | |
| fInPosition = {"inPosition", kFloat2_GrVertexAttribType, kFloat2_GrSLType}; | |
| fInDashParams = {"inDashParams", kFloat3_GrVertexAttribType, kHalf3_GrSLType}; | |
| fInCircleParams = {"inCircleParams", kFloat2_GrVertexAttribType, kHalf2_GrSLType}; | |
| this->setVertexAttributes(&fInPosition, 3); | |
| } | |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(DashingCircleEffect); | |
| #if GR_TEST_UTILS | |
| sk_sp<GrGeometryProcessor> DashingCircleEffect::TestCreate(GrProcessorTestData* d) { | |
| AAMode aaMode = static_cast<AAMode>(d->fRandom->nextULessThan(GrDashOp::kAAModeCnt)); | |
| return DashingCircleEffect::Make(SkPMColor4f::FromBytes_RGBA(GrRandomColor(d->fRandom)), | |
| aaMode, GrTest::TestMatrix(d->fRandom), | |
| d->fRandom->nextBool()); | |
| } | |
| #endif | |
| ////////////////////////////////////////////////////////////////////////////// | |
| class GLDashingLineEffect; | |
| /* | |
| * This effect will draw a dashed line. The width of the dash is given by the strokeWidth and the | |
| * length and spacing by the DashInfo. Both of the previous two parameters are in device space. | |
| * This effect also requires the setting of a float2 vertex attribute for the the four corners of the | |
| * bounding rect. This attribute is the "dash position" of each vertex. In other words it is the | |
| * vertex coords (in device space) if we transform the line to be horizontal, with the start of | |
| * line at the origin then shifted to the right by half the off interval. The line then goes in the | |
| * positive x direction. | |
| */ | |
| class DashingLineEffect : public GrGeometryProcessor { | |
| public: | |
| typedef SkPathEffect::DashInfo DashInfo; | |
| static sk_sp<GrGeometryProcessor> Make(const SkPMColor4f&, | |
| AAMode aaMode, | |
| const SkMatrix& localMatrix, | |
| bool usesLocalCoords); | |
| const char* name() const override { return "DashingEffect"; } | |
| AAMode aaMode() const { return fAAMode; } | |
| const SkPMColor4f& color() const { return fColor; } | |
| const SkMatrix& localMatrix() const { return fLocalMatrix; } | |
| bool usesLocalCoords() const { return fUsesLocalCoords; } | |
| void getGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override; | |
| GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const override; | |
| private: | |
| DashingLineEffect(const SkPMColor4f&, AAMode aaMode, const SkMatrix& localMatrix, | |
| bool usesLocalCoords); | |
| SkPMColor4f fColor; | |
| SkMatrix fLocalMatrix; | |
| bool fUsesLocalCoords; | |
| AAMode fAAMode; | |
| Attribute fInPosition; | |
| Attribute fInDashParams; | |
| Attribute fInRect; | |
| GR_DECLARE_GEOMETRY_PROCESSOR_TEST | |
| friend class GLDashingLineEffect; | |
| typedef GrGeometryProcessor INHERITED; | |
| }; | |
| ////////////////////////////////////////////////////////////////////////////// | |
| class GLDashingLineEffect : public GrGLSLGeometryProcessor { | |
| public: | |
| GLDashingLineEffect(); | |
| void onEmitCode(EmitArgs&, GrGPArgs*) override; | |
| static inline void GenKey(const GrGeometryProcessor&, | |
| const GrShaderCaps&, | |
| GrProcessorKeyBuilder*); | |
| void setData(const GrGLSLProgramDataManager&, const GrPrimitiveProcessor&, | |
| FPCoordTransformIter&& iter) override; | |
| private: | |
| SkPMColor4f fColor; | |
| UniformHandle fColorUniform; | |
| typedef GrGLSLGeometryProcessor INHERITED; | |
| }; | |
| GLDashingLineEffect::GLDashingLineEffect() : fColor(SK_PMColor4fILLEGAL) {} | |
| void GLDashingLineEffect::onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) { | |
| const DashingLineEffect& de = args.fGP.cast<DashingLineEffect>(); | |
| GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder; | |
| GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler; | |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; | |
| // emit attributes | |
| varyingHandler->emitAttributes(de); | |
| // XY refers to dashPos, Z is the dash interval length | |
| GrGLSLVarying inDashParams(kFloat3_GrSLType); | |
| varyingHandler->addVarying("DashParams", &inDashParams); | |
| vertBuilder->codeAppendf("%s = %s;", inDashParams.vsOut(), de.fInDashParams.name()); | |
| // The rect uniform's xyzw refer to (left + 0.5, top + 0.5, right - 0.5, bottom - 0.5), | |
| // respectively. | |
| GrGLSLVarying inRectParams(kFloat4_GrSLType); | |
| varyingHandler->addVarying("RectParams", &inRectParams); | |
| vertBuilder->codeAppendf("%s = %s;", inRectParams.vsOut(), de.fInRect.name()); | |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; | |
| // Setup pass through color | |
| this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform); | |
| // Setup position | |
| this->writeOutputPosition(vertBuilder, gpArgs, de.fInPosition.name()); | |
| // emit transforms | |
| this->emitTransforms(vertBuilder, | |
| varyingHandler, | |
| uniformHandler, | |
| de.fInPosition.asShaderVar(), | |
| de.localMatrix(), | |
| args.fFPCoordTransformHandler); | |
| // transforms all points so that we can compare them to our test rect | |
| fragBuilder->codeAppendf("half xShifted = half(%s.x - floor(%s.x / %s.z) * %s.z);", | |
| inDashParams.fsIn(), inDashParams.fsIn(), inDashParams.fsIn(), | |
| inDashParams.fsIn()); | |
| fragBuilder->codeAppendf("half2 fragPosShifted = half2(xShifted, half(%s.y));", | |
| inDashParams.fsIn()); | |
| if (de.aaMode() == AAMode::kCoverage) { | |
| // The amount of coverage removed in x and y by the edges is computed as a pair of negative | |
| // numbers, xSub and ySub. | |
| fragBuilder->codeAppend("half xSub, ySub;"); | |
| fragBuilder->codeAppendf("xSub = half(min(fragPosShifted.x - %s.x, 0.0));", | |
| inRectParams.fsIn()); | |
| fragBuilder->codeAppendf("xSub += half(min(%s.z - fragPosShifted.x, 0.0));", | |
| inRectParams.fsIn()); | |
| fragBuilder->codeAppendf("ySub = half(min(fragPosShifted.y - %s.y, 0.0));", | |
| inRectParams.fsIn()); | |
| fragBuilder->codeAppendf("ySub += half(min(%s.w - fragPosShifted.y, 0.0));", | |
| inRectParams.fsIn()); | |
| // Now compute coverage in x and y and multiply them to get the fraction of the pixel | |
| // covered. | |
| fragBuilder->codeAppendf( | |
| "half alpha = (1.0 + max(xSub, -1.0)) * (1.0 + max(ySub, -1.0));"); | |
| } else if (de.aaMode() == AAMode::kCoverageWithMSAA) { | |
| // For MSAA, we don't modulate the alpha by the Y distance, since MSAA coverage will handle | |
| // AA on the the top and bottom edges. The shader is only responsible for intra-dash alpha. | |
| fragBuilder->codeAppend("half xSub;"); | |
| fragBuilder->codeAppendf("xSub = half(min(fragPosShifted.x - %s.x, 0.0));", | |
| inRectParams.fsIn()); | |
| fragBuilder->codeAppendf("xSub += half(min(%s.z - fragPosShifted.x, 0.0));", | |
| inRectParams.fsIn()); | |
| // Now compute coverage in x to get the fraction of the pixel covered. | |
| fragBuilder->codeAppendf("half alpha = (1.0 + max(xSub, -1.0));"); | |
| } else { | |
| // Assuming the bounding geometry is tight so no need to check y values | |
| fragBuilder->codeAppendf("half alpha = 1.0;"); | |
| fragBuilder->codeAppendf("alpha *= (fragPosShifted.x - %s.x) > -0.5 ? 1.0 : 0.0;", | |
| inRectParams.fsIn()); | |
| fragBuilder->codeAppendf("alpha *= (%s.z - fragPosShifted.x) >= -0.5 ? 1.0 : 0.0;", | |
| inRectParams.fsIn()); | |
| } | |
| fragBuilder->codeAppendf("%s = half4(alpha);", args.fOutputCoverage); | |
| } | |
| void GLDashingLineEffect::setData(const GrGLSLProgramDataManager& pdman, | |
| const GrPrimitiveProcessor& processor, | |
| FPCoordTransformIter&& transformIter) { | |
| const DashingLineEffect& de = processor.cast<DashingLineEffect>(); | |
| if (de.color() != fColor) { | |
| pdman.set4fv(fColorUniform, 1, de.color().vec()); | |
| fColor = de.color(); | |
| } | |
| this->setTransformDataHelper(de.localMatrix(), pdman, &transformIter); | |
| } | |
| void GLDashingLineEffect::GenKey(const GrGeometryProcessor& gp, | |
| const GrShaderCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const DashingLineEffect& de = gp.cast<DashingLineEffect>(); | |
| uint32_t key = 0; | |
| key |= de.usesLocalCoords() && de.localMatrix().hasPerspective() ? 0x1 : 0x0; | |
| key |= static_cast<int>(de.aaMode()) << 8; | |
| b->add32(key); | |
| } | |
| ////////////////////////////////////////////////////////////////////////////// | |
| sk_sp<GrGeometryProcessor> DashingLineEffect::Make(const SkPMColor4f& color, | |
| AAMode aaMode, | |
| const SkMatrix& localMatrix, | |
| bool usesLocalCoords) { | |
| return sk_sp<GrGeometryProcessor>( | |
| new DashingLineEffect(color, aaMode, localMatrix, usesLocalCoords)); | |
| } | |
| void DashingLineEffect::getGLSLProcessorKey(const GrShaderCaps& caps, | |
| GrProcessorKeyBuilder* b) const { | |
| GLDashingLineEffect::GenKey(*this, caps, b); | |
| } | |
| GrGLSLPrimitiveProcessor* DashingLineEffect::createGLSLInstance(const GrShaderCaps&) const { | |
| return new GLDashingLineEffect(); | |
| } | |
| DashingLineEffect::DashingLineEffect(const SkPMColor4f& color, | |
| AAMode aaMode, | |
| const SkMatrix& localMatrix, | |
| bool usesLocalCoords) | |
| : INHERITED(kDashingLineEffect_ClassID) | |
| , fColor(color) | |
| , fLocalMatrix(localMatrix) | |
| , fUsesLocalCoords(usesLocalCoords) | |
| , fAAMode(aaMode) { | |
| fInPosition = {"inPosition", kFloat2_GrVertexAttribType, kFloat2_GrSLType}; | |
| fInDashParams = {"inDashParams", kFloat3_GrVertexAttribType, kHalf3_GrSLType}; | |
| fInRect = {"inRect", kFloat4_GrVertexAttribType, kHalf4_GrSLType}; | |
| this->setVertexAttributes(&fInPosition, 3); | |
| } | |
| GR_DEFINE_GEOMETRY_PROCESSOR_TEST(DashingLineEffect); | |
| #if GR_TEST_UTILS | |
| sk_sp<GrGeometryProcessor> DashingLineEffect::TestCreate(GrProcessorTestData* d) { | |
| AAMode aaMode = static_cast<AAMode>(d->fRandom->nextULessThan(GrDashOp::kAAModeCnt)); | |
| return DashingLineEffect::Make(SkPMColor4f::FromBytes_RGBA(GrRandomColor(d->fRandom)), | |
| aaMode, GrTest::TestMatrix(d->fRandom), | |
| d->fRandom->nextBool()); | |
| } | |
| #endif | |
| ////////////////////////////////////////////////////////////////////////////// | |
| static sk_sp<GrGeometryProcessor> make_dash_gp(const SkPMColor4f& color, | |
| AAMode aaMode, | |
| DashCap cap, | |
| const SkMatrix& viewMatrix, | |
| bool usesLocalCoords) { | |
| SkMatrix invert; | |
| if (usesLocalCoords && !viewMatrix.invert(&invert)) { | |
| SkDebugf("Failed to invert\n"); | |
| return nullptr; | |
| } | |
| switch (cap) { | |
| case kRound_DashCap: | |
| return DashingCircleEffect::Make(color, aaMode, invert, usesLocalCoords); | |
| case kNonRound_DashCap: | |
| return DashingLineEffect::Make(color, aaMode, invert, usesLocalCoords); | |
| } | |
| return nullptr; | |
| } | |
| ///////////////////////////////////////////////////////////////////////////////////////////////// | |
| #if GR_TEST_UTILS | |
| GR_DRAW_OP_TEST_DEFINE(DashOp) { | |
| SkMatrix viewMatrix = GrTest::TestMatrixPreservesRightAngles(random); | |
| AAMode aaMode; | |
| do { | |
| aaMode = static_cast<AAMode>(random->nextULessThan(GrDashOp::kAAModeCnt)); | |
| } while (AAMode::kCoverageWithMSAA == aaMode && GrFSAAType::kUnifiedMSAA != fsaaType); | |
| // We can only dash either horizontal or vertical lines | |
| SkPoint pts[2]; | |
| if (random->nextBool()) { | |
| // vertical | |
| pts[0].fX = 1.f; | |
| pts[0].fY = random->nextF() * 10.f; | |
| pts[1].fX = 1.f; | |
| pts[1].fY = random->nextF() * 10.f; | |
| } else { | |
| // horizontal | |
| pts[0].fX = random->nextF() * 10.f; | |
| pts[0].fY = 1.f; | |
| pts[1].fX = random->nextF() * 10.f; | |
| pts[1].fY = 1.f; | |
| } | |
| // pick random cap | |
| SkPaint::Cap cap = SkPaint::Cap(random->nextULessThan(SkPaint::kCapCount)); | |
| SkScalar intervals[2]; | |
| // We can only dash with the following intervals | |
| enum Intervals { | |
| kOpenOpen_Intervals , | |
| kOpenClose_Intervals, | |
| kCloseOpen_Intervals, | |
| }; | |
| Intervals intervalType = SkPaint::kRound_Cap == cap ? | |
| kOpenClose_Intervals : | |
| Intervals(random->nextULessThan(kCloseOpen_Intervals + 1)); | |
| static const SkScalar kIntervalMin = 0.1f; | |
| static const SkScalar kIntervalMinCircles = 1.f; // Must be >= to stroke width | |
| static const SkScalar kIntervalMax = 10.f; | |
| switch (intervalType) { | |
| case kOpenOpen_Intervals: | |
| intervals[0] = random->nextRangeScalar(kIntervalMin, kIntervalMax); | |
| intervals[1] = random->nextRangeScalar(kIntervalMin, kIntervalMax); | |
| break; | |
| case kOpenClose_Intervals: { | |
| intervals[0] = 0.f; | |
| SkScalar min = SkPaint::kRound_Cap == cap ? kIntervalMinCircles : kIntervalMin; | |
| intervals[1] = random->nextRangeScalar(min, kIntervalMax); | |
| break; | |
| } | |
| case kCloseOpen_Intervals: | |
| intervals[0] = random->nextRangeScalar(kIntervalMin, kIntervalMax); | |
| intervals[1] = 0.f; | |
| break; | |
| } | |
| // phase is 0 < sum (i0, i1) | |
| SkScalar phase = random->nextRangeScalar(0, intervals[0] + intervals[1]); | |
| SkPaint p; | |
| p.setStyle(SkPaint::kStroke_Style); | |
| p.setStrokeWidth(SkIntToScalar(1)); | |
| p.setStrokeCap(cap); | |
| p.setPathEffect(GrTest::TestDashPathEffect::Make(intervals, 2, phase)); | |
| GrStyle style(p); | |
| return GrDashOp::MakeDashLineOp(context, std::move(paint), viewMatrix, pts, aaMode, style, | |
| GrGetRandomStencil(random, context)); | |
| } | |
| #endif |