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

Issue 1275633003: Move impl of stroke rect batch from h to cpp (Closed) Base URL: https://skia.googlesource.com/skia.git@strokerect
Patch Set: remove unused function Created 5 years, 4 months ago
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1 /* 1 /*
2 * Copyright 2015 Google Inc. 2 * Copyright 2015 Google Inc.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #include "GrStrokeRectBatch.h" 8 #include "GrStrokeRectBatch.h"
9 #include "GrBatchTest.h" 9 #include "GrBatchTest.h"
10 #include "SkRandom.h" 10 #include "SkRandom.h"
11 11
12 GrStrokeRectBatch::GrStrokeRectBatch(const Geometry& geometry, bool snapToPixelC enters) {
13 this->initClassID<GrStrokeRectBatch>();
14
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 GrPipelineInfo& init) {
32 // Handle any color overrides
33 if (!init.readsColor()) {
34 fGeoData[0].fColor = GrColor_ILLEGAL;
35 }
36 init.getOverrideColorIfSet(&fGeoData[0].fColor);
37
38 // setup batch properties
39 fBatch.fColorIgnored = !init.readsColor();
40 fBatch.fColor = fGeoData[0].fColor;
41 fBatch.fUsesLocalCoords = init.readsLocalCoords();
42 fBatch.fCoverageIgnored = !init.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
69 void GrStrokeRectBatch::generateGeometry(GrBatchTarget* batchTarget, const GrPip eline* pipeline) {
70 SkAutoTUnref<const GrGeometryProcessor> gp;
71 {
72 using namespace GrDefaultGeoProcFactory;
73 Color color(this->color());
74 Coverage coverage(this->coverageIgnored() ? Coverage::kSolid_Type :
75 Coverage::kNone_Type);
76 LocalCoords localCoords(this->usesLocalCoords() ? LocalCoords::kUsePosit ion_Type :
77 LocalCoords::kUnused _Type);
78 gp.reset(GrDefaultGeoProcFactory::Create(color, coverage, localCoords,
79 this->viewMatrix()));
80 }
81
82 batchTarget->initDraw(gp, pipeline);
83
84 size_t vertexStride = gp->getVertexStride();
85
86 SkASSERT(vertexStride == sizeof(GrDefaultGeoProcFactory::PositionAttr));
87
88 Geometry& args = fGeoData[0];
89
90 int vertexCount = kVertsPerHairlineRect;
91 if (args.fStrokeWidth > 0) {
92 vertexCount = kVertsPerStrokeRect;
93 }
94
95 const GrVertexBuffer* vertexBuffer;
96 int firstVertex;
97
98 void* verts = batchTarget->makeVertSpace(vertexStride, vertexCount,
99 &vertexBuffer, &firstVertex);
100
101 if (!verts) {
102 SkDebugf("Could not allocate vertices\n");
103 return;
104 }
105
106 SkPoint* vertex = reinterpret_cast<SkPoint*>(verts);
107
108 GrPrimitiveType primType;
109
110 if (args.fStrokeWidth > 0) {;
111 primType = kTriangleStrip_GrPrimitiveType;
112 args.fRect.sort();
113 init_stroke_rect_strip(vertex, args.fRect, args.fStrokeWidth);
114 } else {
115 // hairline
116 primType = kLineStrip_GrPrimitiveType;
117 vertex[0].set(args.fRect.fLeft, args.fRect.fTop);
118 vertex[1].set(args.fRect.fRight, args.fRect.fTop);
119 vertex[2].set(args.fRect.fRight, args.fRect.fBottom);
120 vertex[3].set(args.fRect.fLeft, args.fRect.fBottom);
121 vertex[4].set(args.fRect.fLeft, args.fRect.fTop);
122 }
123
124 GrVertices vertices;
125 vertices.init(primType, vertexBuffer, firstVertex, vertexCount);
126 batchTarget->draw(vertices);
127 }
128
12 #ifdef GR_TEST_UTILS 129 #ifdef GR_TEST_UTILS
13 130
14 BATCH_TEST_DEFINE(GrStrokeRectBatch) { 131 BATCH_TEST_DEFINE(GrStrokeRectBatch) {
15 GrStrokeRectBatch::Geometry geometry; 132 GrStrokeRectBatch::Geometry geometry;
16 geometry.fViewMatrix = GrTest::TestMatrix(random); 133 geometry.fViewMatrix = GrTest::TestMatrix(random);
17 geometry.fColor = GrRandomColor(random); 134 geometry.fColor = GrRandomColor(random);
18 geometry.fRect = GrTest::TestRect(random); 135 geometry.fRect = GrTest::TestRect(random);
19 geometry.fStrokeWidth = random->nextBool() ? 0.0f : 1.0f; 136 geometry.fStrokeWidth = random->nextBool() ? 0.0f : 1.0f;
20 137
21 return GrStrokeRectBatch::Create(geometry, random->nextBool()); 138 return GrStrokeRectBatch::Create(geometry, random->nextBool());
22 } 139 }
23 140
24 #endif 141 #endif
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