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/ops/DashLinePathRenderer.h"
9
10 #include "src/gpu/GrAuditTrail.h"
11 #include "src/gpu/GrGpu.h"
12 #include "src/gpu/geometry/GrStyledShape.h"
13 #include "src/gpu/ops/DashOp.h"
14 #include "src/gpu/ops/GrMeshDrawOp.h"
15 #include "src/gpu/v1/SurfaceDrawContext_v1.h"
16
17 namespace skgpu::v1 {
18
onCanDrawPath(const CanDrawPathArgs & args) const19 PathRenderer::CanDrawPath DashLinePathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const {
20 SkPoint pts[2];
21 bool inverted;
22 if (args.fShape->style().isDashed() && args.fShape->asLine(pts, &inverted)) {
23 // We should never have an inverse dashed case.
24 SkASSERT(!inverted);
25 if (!DashOp::CanDrawDashLine(pts, args.fShape->style(), *args.fViewMatrix)) {
26 return CanDrawPath::kNo;
27 }
28 return CanDrawPath::kYes;
29 }
30 return CanDrawPath::kNo;
31 }
32
onDrawPath(const DrawPathArgs & args)33 bool DashLinePathRenderer::onDrawPath(const DrawPathArgs& args) {
34 GR_AUDIT_TRAIL_AUTO_FRAME(args.fContext->priv().auditTrail(),
35 "DashLinePathRenderer::onDrawPath");
36 DashOp::AAMode aaMode;
37 switch (args.fAAType) {
38 case GrAAType::kNone:
39 aaMode = DashOp::AAMode::kNone;
40 break;
41 case GrAAType::kMSAA:
42 // In this mode we will use aa between dashes but the outer border uses MSAA. Otherwise,
43 // we can wind up with external edges antialiased and internal edges unantialiased.
44 aaMode = DashOp::AAMode::kCoverageWithMSAA;
45 break;
46 case GrAAType::kCoverage:
47 aaMode = DashOp::AAMode::kCoverage;
48 break;
49 }
50 SkPoint pts[2];
51 SkAssertResult(args.fShape->asLine(pts, nullptr));
52 GrOp::Owner op = DashOp::MakeDashLineOp(args.fContext, std::move(args.fPaint),
53 *args.fViewMatrix, pts, aaMode, args.fShape->style(),
54 args.fUserStencilSettings);
55 if (!op) {
56 return false;
57 }
58 args.fSurfaceDrawContext->addDrawOp(args.fClip, std::move(op));
59 return true;
60 }
61
62 } // namespace skgpu::v1
63