1
2 /*
3 * Copyright 2014 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9 #include "GrGLPathRange.h"
10 #include "GrGLPath.h"
11 #include "GrGLPathRendering.h"
12 #include "GrGLGpu.h"
13
GrGLPathRange(GrGLGpu * gpu,PathGenerator * pathGenerator,const GrStrokeInfo & stroke)14 GrGLPathRange::GrGLPathRange(GrGLGpu* gpu, PathGenerator* pathGenerator, const GrStrokeInfo& stroke)
15 : INHERITED(gpu, pathGenerator),
16 fStroke(stroke),
17 fBasePathID(gpu->glPathRendering()->genPaths(this->getNumPaths())),
18 fGpuMemorySize(0) {
19 this->init();
20 this->registerWithCache();
21 }
22
GrGLPathRange(GrGLGpu * gpu,GrGLuint basePathID,int numPaths,size_t gpuMemorySize,const GrStrokeInfo & stroke)23 GrGLPathRange::GrGLPathRange(GrGLGpu* gpu,
24 GrGLuint basePathID,
25 int numPaths,
26 size_t gpuMemorySize,
27 const GrStrokeInfo& stroke)
28 : INHERITED(gpu, numPaths),
29 fStroke(stroke),
30 fBasePathID(basePathID),
31 fGpuMemorySize(gpuMemorySize) {
32 this->init();
33 this->registerWithCache();
34 }
35
init()36 void GrGLPathRange::init() {
37 // Must force fill:
38 // * dashing: NVPR stroke dashing is different to Skia.
39 // * end caps: NVPR stroking degenerate contours with end caps is different to Skia.
40 bool forceFill = fStroke.isDashed() ||
41 (fStroke.needToApply() && fStroke.getCap() != SkPaint::kButt_Cap);
42
43 if (forceFill) {
44 fShouldStroke = false;
45 fShouldFill = true;
46 } else {
47 fShouldStroke = fStroke.needToApply();
48 fShouldFill = fStroke.isFillStyle() ||
49 fStroke.getStyle() == SkStrokeRec::kStrokeAndFill_Style;
50 }
51 }
52
onInitPath(int index,const SkPath & origSkPath) const53 void GrGLPathRange::onInitPath(int index, const SkPath& origSkPath) const {
54 GrGLGpu* gpu = static_cast<GrGLGpu*>(this->getGpu());
55 if (nullptr == gpu) {
56 return;
57 }
58
59 // Make sure the path at this index hasn't been initted already.
60 SkDEBUGCODE(
61 GrGLboolean isPath;
62 GR_GL_CALL_RET(gpu->glInterface(), isPath, IsPath(fBasePathID + index)));
63 SkASSERT(GR_GL_FALSE == isPath);
64
65 if (origSkPath.isEmpty()) {
66 GrGLPath::InitPathObjectEmptyPath(gpu, fBasePathID + index);
67 } else if (fShouldStroke) {
68 GrGLPath::InitPathObjectPathData(gpu, fBasePathID + index, origSkPath);
69 GrGLPath::InitPathObjectStroke(gpu, fBasePathID + index, fStroke);
70 } else {
71 const SkPath* skPath = &origSkPath;
72 SkTLazy<SkPath> tmpPath;
73 const GrStrokeInfo* stroke = &fStroke;
74 GrStrokeInfo tmpStroke(SkStrokeRec::kFill_InitStyle);
75
76 // Dashing must be applied to the path. However, if dashing is present,
77 // we must convert all the paths to fills. The GrStrokeInfo::applyDash leaves
78 // simple paths as strokes but converts other paths to fills.
79 // Thus we must stroke the strokes here, so that all paths in the
80 // path range are using the same style.
81 if (fStroke.isDashed()) {
82 if (!stroke->applyDashToPath(tmpPath.init(), &tmpStroke, *skPath)) {
83 return;
84 }
85 skPath = tmpPath.get();
86 stroke = &tmpStroke;
87 }
88 if (stroke->needToApply()) {
89 if (!tmpPath.isValid()) {
90 tmpPath.init();
91 }
92 if (!stroke->applyToPath(tmpPath.get(), *tmpPath.get())) {
93 return;
94 }
95 }
96 GrGLPath::InitPathObjectPathData(gpu, fBasePathID + index, *skPath);
97 }
98 // TODO: Use a better approximation for the individual path sizes.
99 fGpuMemorySize += 100;
100 }
101
onRelease()102 void GrGLPathRange::onRelease() {
103 SkASSERT(this->getGpu());
104
105 if (0 != fBasePathID && this->shouldFreeResources()) {
106 static_cast<GrGLGpu*>(this->getGpu())->glPathRendering()->deletePaths(fBasePathID,
107 this->getNumPaths());
108 fBasePathID = 0;
109 }
110
111 INHERITED::onRelease();
112 }
113
onAbandon()114 void GrGLPathRange::onAbandon() {
115 fBasePathID = 0;
116
117 INHERITED::onAbandon();
118 }
119