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Side by Side Diff: src/gpu/batches/GrStrokeRectBatch.cpp

Issue 1353683003: Move StrokeRectBatches into .cpp files (Closed) Base URL: https://skia.googlesource.com/skia.git@statics
Patch Set: tweaks Created 5 years, 3 months ago
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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 "GrStrokeRectBatch.h"
9 #include "GrBatchTest.h"
10 #include "GrBatchFlushState.h"
11 #include "SkRandom.h"
12
13 GrStrokeRectBatch::GrStrokeRectBatch(const Geometry& geometry, bool snapToPixelC enters)
14 : INHERITED(ClassID()) {
15 fBatch.fHairline = geometry.fStrokeWidth == 0;
16
17 fGeoData.push_back(geometry);
18
19 // setup bounds
20 fBounds = geometry.fRect;
21 SkScalar rad = SkScalarHalf(geometry.fStrokeWidth);
22 fBounds.outset(rad, rad);
23 geometry.fViewMatrix.mapRect(&fBounds);
24
25 // If our caller snaps to pixel centers then we have to round out the bounds
26 if (snapToPixelCenters) {
27 fBounds.roundOut();
28 }
29 }
30
31 void GrStrokeRectBatch::initBatchTracker(const GrPipelineOptimizations& opt) {
32 // Handle any color overrides
33 if (!opt.readsColor()) {
34 fGeoData[0].fColor = GrColor_ILLEGAL;
35 }
36 opt.getOverrideColorIfSet(&fGeoData[0].fColor);
37
38 // setup batch properties
39 fBatch.fColorIgnored = !opt.readsColor();
40 fBatch.fColor = fGeoData[0].fColor;
41 fBatch.fUsesLocalCoords = opt.readsLocalCoords();
42 fBatch.fCoverageIgnored = !opt.readsCoverage();
43 }
44
45 /* create a triangle strip that strokes the specified rect. There are 8
46 unique vertices, but we repeat the last 2 to close up. Alternatively we
47 could use an indices array, and then only send 8 verts, but not sure that
48 would be faster.
49 */
50 static void init_stroke_rect_strip(SkPoint verts[10], const SkRect& rect, SkScal ar width) {
51 const SkScalar rad = SkScalarHalf(width);
52 // TODO we should be able to enable this assert, but we'd have to filter the se draws
53 // this is a bug
54 //SkASSERT(rad < rect.width() / 2 && rad < rect.height() / 2);
55
56 verts[0].set(rect.fLeft + rad, rect.fTop + rad);
57 verts[1].set(rect.fLeft - rad, rect.fTop - rad);
58 verts[2].set(rect.fRight - rad, rect.fTop + rad);
59 verts[3].set(rect.fRight + rad, rect.fTop - rad);
60 verts[4].set(rect.fRight - rad, rect.fBottom - rad);
61 verts[5].set(rect.fRight + rad, rect.fBottom + rad);
62 verts[6].set(rect.fLeft + rad, rect.fBottom - rad);
63 verts[7].set(rect.fLeft - rad, rect.fBottom + rad);
64 verts[8] = verts[0];
65 verts[9] = verts[1];
66 }
67
68 void GrStrokeRectBatch::onPrepareDraws(Target* target) {
69 SkAutoTUnref<const GrGeometryProcessor> gp;
70 {
71 using namespace GrDefaultGeoProcFactory;
72 Color color(this->color());
73 Coverage coverage(this->coverageIgnored() ? Coverage::kSolid_Type :
74 Coverage::kNone_Type);
75 LocalCoords localCoords(this->usesLocalCoords() ? LocalCoords::kUsePosit ion_Type :
76 LocalCoords::kUnused _Type);
77 gp.reset(GrDefaultGeoProcFactory::Create(color, coverage, localCoords,
78 this->viewMatrix()));
79 }
80
81 target->initDraw(gp, this->pipeline());
82
83 size_t vertexStride = gp->getVertexStride();
84
85 SkASSERT(vertexStride == sizeof(GrDefaultGeoProcFactory::PositionAttr));
86
87 Geometry& args = fGeoData[0];
88
89 int vertexCount = kVertsPerHairlineRect;
90 if (args.fStrokeWidth > 0) {
91 vertexCount = kVertsPerStrokeRect;
92 }
93
94 const GrVertexBuffer* vertexBuffer;
95 int firstVertex;
96
97 void* verts = target->makeVertexSpace(vertexStride, vertexCount, &vertexBuff er, &firstVertex);
98
99 if (!verts) {
100 SkDebugf("Could not allocate vertices\n");
101 return;
102 }
103
104 SkPoint* vertex = reinterpret_cast<SkPoint*>(verts);
105
106 GrPrimitiveType primType;
107
108 if (args.fStrokeWidth > 0) {;
109 primType = kTriangleStrip_GrPrimitiveType;
110 args.fRect.sort();
111 init_stroke_rect_strip(vertex, args.fRect, args.fStrokeWidth);
112 } else {
113 // hairline
114 primType = kLineStrip_GrPrimitiveType;
115 vertex[0].set(args.fRect.fLeft, args.fRect.fTop);
116 vertex[1].set(args.fRect.fRight, args.fRect.fTop);
117 vertex[2].set(args.fRect.fRight, args.fRect.fBottom);
118 vertex[3].set(args.fRect.fLeft, args.fRect.fBottom);
119 vertex[4].set(args.fRect.fLeft, args.fRect.fTop);
120 }
121
122 GrVertices vertices;
123 vertices.init(primType, vertexBuffer, firstVertex, vertexCount);
124 target->draw(vertices);
125 }
126
127 #ifdef GR_TEST_UTILS
128
129 DRAW_BATCH_TEST_DEFINE(GrStrokeRectBatch) {
130 GrStrokeRectBatch::Geometry geometry;
131 geometry.fViewMatrix = GrTest::TestMatrix(random);
132 geometry.fColor = GrRandomColor(random);
133 geometry.fRect = GrTest::TestRect(random);
134 geometry.fStrokeWidth = random->nextBool() ? 0.0f : 1.0f;
135
136 return GrStrokeRectBatch::Create(geometry, random->nextBool());
137 }
138
139 #endif
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