| /* |
| * Copyright 2021 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "experimental/graphite/src/Device.h" |
| |
| #include "experimental/graphite/include/SkStuff.h" |
| #include "experimental/graphite/src/DrawContext.h" |
| #include "experimental/graphite/src/DrawList.h" |
| #include "experimental/graphite/src/Recorder.h" |
| #include "experimental/graphite/src/geom/BoundsManager.h" |
| #include "experimental/graphite/src/geom/Shape.h" |
| #include "experimental/graphite/src/geom/Transform_graphite.h" |
| |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPathEffect.h" |
| #include "include/core/SkStrokeRec.h" |
| |
| #include "src/core/SkMatrixPriv.h" |
| #include "src/core/SkPaintPriv.h" |
| #include "src/core/SkSpecialImage.h" |
| |
| namespace skgpu { |
| |
| namespace { |
| |
| static const SkStrokeRec kFillStyle(SkStrokeRec::kFill_InitStyle); |
| |
| bool is_opaque(const PaintParams& paint) { |
| // TODO: implement this |
| return false; |
| } |
| |
| } // anonymous namespace |
| |
| sk_sp<Device> Device::Make(sk_sp<Recorder> recorder, const SkImageInfo& ii) { |
| sk_sp<DrawContext> dc = DrawContext::Make(ii); |
| if (!dc) { |
| return nullptr; |
| } |
| |
| return sk_sp<Device>(new Device(std::move(recorder), std::move(dc))); |
| } |
| |
| Device::Device(sk_sp<Recorder> recorder, sk_sp<DrawContext> dc) |
| : SkBaseDevice(dc->imageInfo(), SkSurfaceProps()) |
| , fRecorder(std::move(recorder)) |
| , fDC(std::move(dc)) |
| , fColorDepthBoundsManager(std::make_unique<NaiveBoundsManager>()) |
| , fCurrentDepth(DrawOrder::kClearDepth) |
| , fMaxStencilIndex(DrawOrder::kUnassigned) |
| , fDrawsOverlap(false) { |
| SkASSERT(SkToBool(fDC) && SkToBool(fRecorder)); |
| } |
| |
| Device::~Device() = default; |
| |
| SkBaseDevice* Device::onCreateDevice(const CreateInfo& info, const SkPaint*) { |
| // TODO: Inspect the paint and create info to determine if there's anything that has to be |
| // modified to support inline subpasses. |
| // TODO: onCreateDevice really should return sk_sp<SkBaseDevice>... |
| return Make(fRecorder, info.fInfo).release(); |
| } |
| |
| sk_sp<SkSurface> Device::makeSurface(const SkImageInfo& ii, const SkSurfaceProps& /* props */) { |
| return MakeGraphite(fRecorder, ii); |
| } |
| |
| bool Device::onReadPixels(const SkPixmap& pm, int x, int y) { |
| this->flushPendingWorkToRecorder(); |
| // TODO: actually do a read back |
| pm.erase(SK_ColorGREEN); |
| return true; |
| } |
| |
| void Device::drawPaint(const SkPaint& paint) { |
| SkRect deviceBounds = SkRect::Make(this->devClipBounds()); |
| // TODO: Should be able to get the inverse from the matrix cache |
| SkM44 devToLocal; |
| if (!this->localToDevice44().invert(&devToLocal)) { |
| // TBD: This matches legacy behavior for drawPaint() that requires local coords, although |
| // v1 handles arbitrary transforms when the paint is solid color because it just fills the |
| // device bounds directly. In the new world it might be nice to have non-invertible |
| // transforms formalized (i.e. no drawing ever, handled at SkCanvas level possibly?) |
| return; |
| } |
| SkRect localCoveringBounds = SkMatrixPriv::MapRect(devToLocal, deviceBounds); |
| this->drawShape(Shape(localCoveringBounds), paint, kFillStyle, |
| DrawFlags::kIgnorePathEffect | DrawFlags::kIgnoreMaskFilter); |
| } |
| |
| void Device::drawRect(const SkRect& r, const SkPaint& paint) { |
| this->drawShape(Shape(r), paint, SkStrokeRec(paint)); |
| } |
| |
| void Device::drawOval(const SkRect& oval, const SkPaint& paint) { |
| // TODO: This has wasted effort from the SkCanvas level since it instead converts rrects that |
| // happen to be ovals into this, only for us to go right back to rrect. |
| this->drawShape(Shape(SkRRect::MakeOval(oval)), paint, SkStrokeRec(paint)); |
| } |
| |
| void Device::drawRRect(const SkRRect& rr, const SkPaint& paint) { |
| this->drawShape(Shape(rr), paint, SkStrokeRec(paint)); |
| } |
| |
| void Device::drawPath(const SkPath& path, const SkPaint& paint, bool pathIsMutable) { |
| // TODO: If we do try to inspect the path, it should happen here and possibly after computing |
| // the path effect. Alternatively, all that should be handled in SkCanvas. |
| this->drawShape(Shape(path), paint, SkStrokeRec(paint)); |
| } |
| |
| void Device::drawPoints(SkCanvas::PointMode mode, size_t count, |
| const SkPoint* points, const SkPaint& paint) { |
| // TODO: I'm [ml] not sure either CPU or GPU backend really has a fast path for this that |
| // isn't captured by drawOval and drawLine, so could easily be moved into SkCanvas. |
| if (mode == SkCanvas::kPoints_PointMode) { |
| float radius = 0.5f * paint.getStrokeWidth(); |
| for (size_t i = 0; i < count; ++i) { |
| SkRect pointRect = SkRect::MakeLTRB(points[i].fX - radius, points[i].fY - radius, |
| points[i].fX + radius, points[i].fY + radius); |
| // drawOval/drawRect with a forced fill style |
| if (paint.getStrokeCap() == SkPaint::kRound_Cap) { |
| this->drawShape(Shape(SkRRect::MakeOval(pointRect)), paint, kFillStyle); |
| } else { |
| this->drawShape(Shape(pointRect), paint, kFillStyle); |
| } |
| } |
| } else { |
| // Force the style to be a stroke, using the radius and cap from the paint |
| SkStrokeRec stroke(paint, SkPaint::kStroke_Style); |
| size_t inc = (mode == SkCanvas::kLines_PointMode) ? 2 : 1; |
| for (size_t i = 0; i < count; i += inc) { |
| this->drawShape(Shape(points[i], points[i + 1]), paint, stroke); |
| } |
| } |
| } |
| |
| void Device::drawShape(const Shape& shape, |
| const SkPaint& paint, |
| const SkStrokeRec& style, |
| Mask<DrawFlags> flags) { |
| // TODO: Device will cache the Transform or otherwise ensure it's computed once per change to |
| // its local-to-device matrix, but that requires updating SkDevice's virtuals. Right now we |
| // re-compute the Transform every draw, as well as any time we recurse on drawShape(), but that |
| // goes away with the caching. |
| Transform localToDevice(this->localToDevice44()); |
| if (!localToDevice.valid()) { |
| // If the transform is not invertible or not finite then drawing isn't well defined. |
| // TBD: This warning should go through the general purpose graphite logging system |
| SkDebugf("[graphite] WARNING - Skipping draw with non-invertible/non-finite transform.\n"); |
| return; |
| } |
| |
| // Heavy weight paint options like path effects, mask filters, and stroke-and-fill style are |
| // applied on the CPU by generating a new shape and recursing on drawShape() with updated flags |
| if (!(flags & DrawFlags::kIgnorePathEffect) && paint.getPathEffect()) { |
| // Apply the path effect before anything else |
| // TODO: If asADash() returns true and the base path matches the dashing fast path, then |
| // that should be detected now as well. Maybe add dashPath to Device so canvas can handle it |
| SkStrokeRec newStyle = style; |
| newStyle.setResScale(localToDevice.maxScaleFactor()); |
| SkPath dst; |
| if (paint.getPathEffect()->filterPath(&dst, shape.asPath(), &newStyle, |
| nullptr, localToDevice)) { |
| // Recurse using the path and new style, while disabling downstream path effect handling |
| this->drawShape(Shape(dst), paint, newStyle, flags | DrawFlags::kIgnorePathEffect); |
| return; |
| } else { |
| // TBD: This warning should go through the general purpose graphite logging system |
| SkDebugf("[graphite] WARNING - Path effect failed to apply, drawing original path.\n"); |
| this->drawShape(shape, paint, style, flags | DrawFlags::kIgnorePathEffect); |
| return; |
| } |
| } |
| |
| if (!(flags & DrawFlags::kIgnoreMaskFilter) && paint.getMaskFilter()) { |
| // TODO: Handle mask filters, ignored for the sprint. |
| // TODO: Could this be handled by SkCanvas by drawing a mask, blurring, and then sampling |
| // with a rect draw? What about fast paths for rrect blur masks... |
| this->drawShape(shape, paint, style, flags | DrawFlags::kIgnoreMaskFilter); |
| return; |
| } |
| |
| // If we got here, then path effects and mask filters should have been handled and the style |
| // should be fill or stroke/hairline. Stroke-and-fill is not handled by DrawContext, but is |
| // emulated here by drawing twice--one stroke and one fill--using the same depth value. |
| SkASSERT(!SkToBool(paint.getPathEffect()) || (flags & DrawFlags::kIgnorePathEffect)); |
| SkASSERT(!SkToBool(paint.getMaskFilter()) || (flags & DrawFlags::kIgnoreMaskFilter)); |
| |
| // Check if we have room to record into the current list before determining clipping and order |
| const SkStrokeRec::Style styleType = style.getStyle(); |
| if (this->needsFlushBeforeDraw(styleType == SkStrokeRec::kStrokeAndFill_Style ? 2 : 1)) { |
| this->flushPendingWorkToRecorder(); |
| } |
| |
| DrawOrder order(fCurrentDepth.next()); |
| ClipResult clip = this->applyClipToDraw(localToDevice, shape, style, order.depth()); |
| if (clip.fDrawBounds.isEmptyNegativeOrNaN()) { |
| // Clipped out, so don't record anything |
| return; |
| } |
| |
| // A draw's order always depends on the clips that must be drawn before it |
| order.dependsOnPaintersOrder(clip.fOrder); |
| |
| auto blendMode = paint.asBlendMode(); |
| PaintParams shading{paint.getColor4f(), |
| blendMode.has_value() ? *blendMode : SkBlendMode::kSrcOver, |
| paint.refShader()}; |
| |
| // If a draw is not opaque, it must be drawn after the most recent draw it intersects with in |
| // order to blend correctly. We always query the most recent draw (even when opaque) because it |
| // also lets Device easily track whether or not there are any overlapping draws. |
| const bool opaque = is_opaque(shading); |
| CompressedPaintersOrder prevDraw = |
| fColorDepthBoundsManager->getMostRecentDraw(clip.fDrawBounds); |
| if (!opaque) { |
| order.dependsOnPaintersOrder(prevDraw); |
| } |
| |
| if (styleType == SkStrokeRec::kStroke_Style || |
| styleType == SkStrokeRec::kHairline_Style || |
| styleType == SkStrokeRec::kStrokeAndFill_Style) { |
| // TODO: If DC supports stroked primitives, Device could choose one of those based on shape |
| StrokeParams stroke(style.getWidth(), style.getMiter(), style.getJoin(), style.getCap()); |
| fDC->strokePath(localToDevice, shape, stroke, clip.fScissor, order, &shading); |
| } |
| if (styleType == SkStrokeRec::kFill_Style || |
| styleType == SkStrokeRec::kStrokeAndFill_Style) { |
| // TODO: If DC supports filled primitives, Device could choose one of those based on shape |
| |
| // TODO: Route all filled shapes to stencil-and-cover for the sprint; convex will draw |
| // correctly but uses an unnecessary stencil step. |
| // if (shape.convex()) { |
| // fDC->fillConvexPath(localToDevice, shape, clip.fScissor, order, &shading); |
| // } else { |
| order.dependsOnStencil(fMaxStencilIndex.next()); |
| fDC->stencilAndFillPath(localToDevice, shape, clip.fScissor, order, &shading); |
| // } |
| } |
| |
| // Record the painters order and depth used for this draw |
| const bool fullyOpaque = opaque && shape.isRect() && |
| localToDevice.type() <= Transform::Type::kRectStaysRect; |
| fColorDepthBoundsManager->recordDraw(shape.bounds(), |
| order.paintOrder(), |
| order.depth(), |
| fullyOpaque); |
| |
| fCurrentDepth = order.depth(); |
| if (order.stencilIndex() != DrawOrder::kUnassigned) { |
| fMaxStencilIndex = std::max(fMaxStencilIndex, order.stencilIndex()); |
| } |
| fDrawsOverlap |= (prevDraw != DrawOrder::kNoIntersection); |
| } |
| |
| Device::ClipResult Device::applyClipToDraw(const Transform& localToDevice, |
| const Shape& shape, |
| const SkStrokeRec& style, |
| PaintersDepth z) { |
| SkIRect scissor = this->devClipBounds(); |
| |
| Rect drawBounds = shape.bounds(); |
| if (!style.isHairlineStyle()) { |
| float localStyleOutset = style.getInflationRadius(); |
| drawBounds.outset(localStyleOutset); |
| } |
| drawBounds = localToDevice.mapRect(drawBounds); |
| |
| // Hairlines get an extra pixel *after* transforming to device space |
| if (style.isHairlineStyle()) { |
| drawBounds.outset(0.5f); |
| } |
| |
| drawBounds.intersect(SkRect::Make(scissor)); |
| if (drawBounds.isEmptyNegativeOrNaN()) { |
| // Trivially clipped out, so return now |
| return {scissor, drawBounds, DrawOrder::kNoIntersection}; |
| } |
| |
| // TODO: iterate the clip stack and accumulate draw bounds into clip usage |
| return {scissor, drawBounds, DrawOrder::kNoIntersection}; |
| } |
| |
| void Device::flushPendingWorkToRecorder() { |
| // TODO: we may need to further split this function up since device->device drawList and |
| // DrawPass stealing will need to share some of the same logic w/o becoming a Task. |
| |
| // TODO: iterate the clip stack and issue a depth-only draw for every clip element that has |
| // a non-empty usage bounds, using that bounds as the scissor. |
| auto drawTask = fDC->snapRenderPassTask(fColorDepthBoundsManager.get()); |
| if (drawTask) { |
| fRecorder->add(std::move(drawTask)); |
| } |
| } |
| |
| bool Device::needsFlushBeforeDraw(int numNewDraws) const { |
| // TODO: iterate the clip stack and count the number of clip elements (both w/ and w/o usage |
| // since we want to know the max # of clip shapes that flushing might add as draws). |
| // numNewDraws += clip element count... |
| return (DrawList::kMaxDraws - fDC->pendingDrawCount()) < numNewDraws; |
| } |
| |
| sk_sp<SkSpecialImage> Device::makeSpecial(const SkBitmap&) { |
| return nullptr; |
| } |
| |
| sk_sp<SkSpecialImage> Device::makeSpecial(const SkImage*) { |
| return nullptr; |
| } |
| |
| sk_sp<SkSpecialImage> Device::snapSpecial(const SkIRect& subset, bool forceCopy) { |
| this->flushPendingWorkToRecorder(); |
| return nullptr; |
| } |
| |
| } // namespace skgpu |
