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| 1 /* | |
| 2 * Copyright 2012 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 "GrAARectRenderer.h" | |
| 9 #include "GrBatchTarget.h" | |
| 10 #include "GrBatchTest.h" | |
| 11 #include "GrContext.h" | |
| 12 #include "GrDrawTarget.h" | |
| 13 #include "GrGeometryProcessor.h" | |
| 14 #include "GrInvariantOutput.h" | |
| 15 #include "GrTestUtils.h" | |
| 16 #include "GrVertexBuffer.h" | |
| 17 #include "SkColorPriv.h" | |
| 18 #include "batches/GrAAFillRectBatch.h" | |
| 19 #include "batches/GrAAStrokeRectBatch.h" | |
| 20 #include "gl/GrGLProcessor.h" | |
| 21 #include "gl/GrGLGeometryProcessor.h" | |
| 22 #include "gl/builders/GrGLProgramBuilder.h" | |
| 23 | |
| 24 /////////////////////////////////////////////////////////////////////////////// | |
| 25 | |
| 26 void GrAARectRenderer::GeometryFillAARect(GrDrawTarget* target, | |
| 27 const GrPipelineBuilder& pipelineBuild
er, | |
| 28 GrColor color, | |
| 29 const SkMatrix& viewMatrix, | |
| 30 const SkRect& rect, | |
| 31 const SkRect& devRect) { | |
| 32 GrAAFillRectBatch::Geometry geometry; | |
| 33 geometry.fRect = rect; | |
| 34 geometry.fViewMatrix = viewMatrix; | |
| 35 geometry.fDevRect = devRect; | |
| 36 geometry.fColor = color; | |
| 37 | |
| 38 | |
| 39 SkAutoTUnref<GrBatch> batch(GrAAFillRectBatch::Create(geometry)); | |
| 40 target->drawBatch(pipelineBuilder, batch); | |
| 41 } | |
| 42 | |
| 43 void GrAARectRenderer::StrokeAARect(GrDrawTarget* target, | |
| 44 const GrPipelineBuilder& pipelineBuilder, | |
| 45 GrColor color, | |
| 46 const SkMatrix& viewMatrix, | |
| 47 const SkRect& rect, | |
| 48 const SkRect& devRect, | |
| 49 const SkStrokeRec& stroke) { | |
| 50 SkVector devStrokeSize; | |
| 51 SkScalar width = stroke.getWidth(); | |
| 52 if (width > 0) { | |
| 53 devStrokeSize.set(width, width); | |
| 54 viewMatrix.mapVectors(&devStrokeSize, 1); | |
| 55 devStrokeSize.setAbs(devStrokeSize); | |
| 56 } else { | |
| 57 devStrokeSize.set(SK_Scalar1, SK_Scalar1); | |
| 58 } | |
| 59 | |
| 60 const SkScalar dx = devStrokeSize.fX; | |
| 61 const SkScalar dy = devStrokeSize.fY; | |
| 62 const SkScalar rx = SkScalarMul(dx, SK_ScalarHalf); | |
| 63 const SkScalar ry = SkScalarMul(dy, SK_ScalarHalf); | |
| 64 | |
| 65 SkScalar spare; | |
| 66 { | |
| 67 SkScalar w = devRect.width() - dx; | |
| 68 SkScalar h = devRect.height() - dy; | |
| 69 spare = SkTMin(w, h); | |
| 70 } | |
| 71 | |
| 72 SkRect devOutside(devRect); | |
| 73 devOutside.outset(rx, ry); | |
| 74 | |
| 75 bool miterStroke = true; | |
| 76 // For hairlines, make bevel and round joins appear the same as mitered ones
. | |
| 77 // small miter limit means right angles show bevel... | |
| 78 if ((width > 0) && (stroke.getJoin() != SkPaint::kMiter_Join || | |
| 79 stroke.getMiter() < SK_ScalarSqrt2)) { | |
| 80 miterStroke = false; | |
| 81 } | |
| 82 | |
| 83 if (spare <= 0 && miterStroke) { | |
| 84 FillAARect(target, pipelineBuilder, color, viewMatrix, devOutside, devOu
tside); | |
| 85 return; | |
| 86 } | |
| 87 | |
| 88 SkRect devInside(devRect); | |
| 89 devInside.inset(rx, ry); | |
| 90 | |
| 91 SkRect devOutsideAssist(devRect); | |
| 92 | |
| 93 // For bevel-stroke, use 2 SkRect instances(devOutside and devOutsideAssist) | |
| 94 // to draw the outer of the rect. Because there are 8 vertices on the outer | |
| 95 // edge, while vertex number of inner edge is 4, the same as miter-stroke. | |
| 96 if (!miterStroke) { | |
| 97 devOutside.inset(0, ry); | |
| 98 devOutsideAssist.outset(0, ry); | |
| 99 } | |
| 100 | |
| 101 GeometryStrokeAARect(target, pipelineBuilder, color, viewMatrix, devOutside, | |
| 102 devOutsideAssist, devInside, miterStroke); | |
| 103 } | |
| 104 | |
| 105 void GrAARectRenderer::GeometryStrokeAARect(GrDrawTarget* target, | |
| 106 const GrPipelineBuilder& pipelineBui
lder, | |
| 107 GrColor color, | |
| 108 const SkMatrix& viewMatrix, | |
| 109 const SkRect& devOutside, | |
| 110 const SkRect& devOutsideAssist, | |
| 111 const SkRect& devInside, | |
| 112 bool miterStroke) { | |
| 113 GrAAStrokeRectBatch::Geometry geometry; | |
| 114 geometry.fColor = color; | |
| 115 geometry.fDevOutside = devOutside; | |
| 116 geometry.fDevOutsideAssist = devOutsideAssist; | |
| 117 geometry.fDevInside = devInside; | |
| 118 geometry.fMiterStroke = miterStroke; | |
| 119 | |
| 120 SkAutoTUnref<GrBatch> batch(GrAAStrokeRectBatch::Create(geometry, viewMatrix
)); | |
| 121 target->drawBatch(pipelineBuilder, batch); | |
| 122 } | |
| 123 | |
| 124 void GrAARectRenderer::FillAANestedRects(GrDrawTarget* target, | |
| 125 const GrPipelineBuilder& pipelineBuilde
r, | |
| 126 GrColor color, | |
| 127 const SkMatrix& viewMatrix, | |
| 128 const SkRect rects[2]) { | |
| 129 SkASSERT(viewMatrix.rectStaysRect()); | |
| 130 SkASSERT(!rects[0].isEmpty() && !rects[1].isEmpty()); | |
| 131 | |
| 132 SkRect devOutside, devInside; | |
| 133 viewMatrix.mapRect(&devOutside, rects[0]); | |
| 134 viewMatrix.mapRect(&devInside, rects[1]); | |
| 135 | |
| 136 if (devInside.isEmpty()) { | |
| 137 FillAARect(target, pipelineBuilder, color, viewMatrix, devOutside, devOu
tside); | |
| 138 return; | |
| 139 } | |
| 140 | |
| 141 GeometryStrokeAARect(target, pipelineBuilder, color, viewMatrix, devOutside, | |
| 142 devOutside, devInside, true); | |
| 143 } | |
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Chromium Code Reviews
Issue 1279303002:
Expand functionality of GrRectBatchFactory with AARects (Closed)
Base URL: https://skia.googlesource.com/skia.git@batchfactory3