1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "src/gpu/ganesh/ops/DashLinePathRenderer.h"
9
10 #include "src/gpu/ganesh/GrAuditTrail.h"
11 #include "src/gpu/ganesh/GrGpu.h"
12 #include "src/gpu/ganesh/GrRecordingContextPriv.h"
13 #include "src/gpu/ganesh/SurfaceDrawContext.h"
14 #include "src/gpu/ganesh/geometry/GrStyledShape.h"
15 #include "src/gpu/ganesh/ops/DashOp.h"
16 #include "src/gpu/ganesh/ops/GrMeshDrawOp.h"
17
18 namespace skgpu::ganesh {
19
onCanDrawPath(const CanDrawPathArgs & args) const20 skgpu::v1::PathRenderer::CanDrawPath DashLinePathRenderer::onCanDrawPath(
21 const CanDrawPathArgs& args) const {
22 SkPoint pts[2];
23 bool inverted;
24 if (args.fShape->style().isDashed() && args.fShape->asLine(pts, &inverted)) {
25 // We should never have an inverse dashed case.
26 SkASSERT(!inverted);
27 if (!DashOp::CanDrawDashLine(pts, args.fShape->style(), *args.fViewMatrix)) {
28 return CanDrawPath::kNo;
29 }
30 return CanDrawPath::kYes;
31 }
32 return CanDrawPath::kNo;
33 }
34
onDrawPath(const DrawPathArgs & args)35 bool DashLinePathRenderer::onDrawPath(const DrawPathArgs& args) {
36 GR_AUDIT_TRAIL_AUTO_FRAME(args.fContext->priv().auditTrail(),
37 "DashLinePathRenderer::onDrawPath");
38 DashOp::AAMode aaMode;
39 switch (args.fAAType) {
40 case GrAAType::kNone:
41 aaMode = DashOp::AAMode::kNone;
42 break;
43 case GrAAType::kMSAA:
44 // In this mode we will use aa between dashes but the outer border uses MSAA. Otherwise,
45 // we can wind up with external edges antialiased and internal edges unantialiased.
46 aaMode = DashOp::AAMode::kCoverageWithMSAA;
47 break;
48 case GrAAType::kCoverage:
49 aaMode = DashOp::AAMode::kCoverage;
50 break;
51 }
52 SkPoint pts[2];
53 SkAssertResult(args.fShape->asLine(pts, nullptr));
54 GrOp::Owner op = DashOp::MakeDashLineOp(args.fContext, std::move(args.fPaint),
55 *args.fViewMatrix, pts, aaMode, args.fShape->style(),
56 args.fUserStencilSettings);
57 if (!op) {
58 return false;
59 }
60 args.fSurfaceDrawContext->addDrawOp(args.fClip, std::move(op));
61 return true;
62 }
63
64 } // namespace skgpu::ganesh
65