1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/GrAARectRenderer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,118 @@
1.4 +/*
1.5 + * Copyright 2012 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef GrAARectRenderer_DEFINED
1.12 +#define GrAARectRenderer_DEFINED
1.13 +
1.14 +#include "SkMatrix.h"
1.15 +#include "SkRect.h"
1.16 +#include "SkRefCnt.h"
1.17 +#include "SkStrokeRec.h"
1.18 +
1.19 +class GrGpu;
1.20 +class GrDrawTarget;
1.21 +class GrIndexBuffer;
1.22 +
1.23 +/*
1.24 + * This class wraps helper functions that draw AA rects (filled & stroked)
1.25 + */
1.26 +class GrAARectRenderer : public SkRefCnt {
1.27 +public:
1.28 + SK_DECLARE_INST_COUNT(GrAARectRenderer)
1.29 +
1.30 + GrAARectRenderer()
1.31 + : fAAFillRectIndexBuffer(NULL)
1.32 + , fAAMiterStrokeRectIndexBuffer(NULL)
1.33 + , fAABevelStrokeRectIndexBuffer(NULL) {
1.34 + }
1.35 +
1.36 + void reset();
1.37 +
1.38 + ~GrAARectRenderer() {
1.39 + this->reset();
1.40 + }
1.41 +
1.42 + // TODO: potentialy fuse the fill & stroke methods and differentiate
1.43 + // between them by passing in stroke (==NULL means fill).
1.44 +
1.45 + void fillAARect(GrGpu* gpu,
1.46 + GrDrawTarget* target,
1.47 + const SkRect& rect,
1.48 + const SkMatrix& combinedMatrix,
1.49 + const SkRect& devRect,
1.50 + bool useVertexCoverage) {
1.51 +#ifdef SHADER_AA_FILL_RECT
1.52 + if (combinedMatrix.rectStaysRect()) {
1.53 + this->shaderFillAlignedAARect(gpu, target,
1.54 + rect, combinedMatrix);
1.55 + } else {
1.56 + this->shaderFillAARect(gpu, target,
1.57 + rect, combinedMatrix);
1.58 + }
1.59 +#else
1.60 + this->geometryFillAARect(gpu, target,
1.61 + rect, combinedMatrix,
1.62 + devRect, useVertexCoverage);
1.63 +#endif
1.64 + }
1.65 +
1.66 + void strokeAARect(GrGpu* gpu,
1.67 + GrDrawTarget* target,
1.68 + const SkRect& rect,
1.69 + const SkMatrix& combinedMatrix,
1.70 + const SkRect& devRect,
1.71 + const SkStrokeRec* stroke,
1.72 + bool useVertexCoverage);
1.73 +
1.74 + // First rect is outer; second rect is inner
1.75 + void fillAANestedRects(GrGpu* gpu,
1.76 + GrDrawTarget* target,
1.77 + const SkRect rects[2],
1.78 + const SkMatrix& combinedMatrix,
1.79 + bool useVertexCoverage);
1.80 +
1.81 +private:
1.82 + GrIndexBuffer* fAAFillRectIndexBuffer;
1.83 + GrIndexBuffer* fAAMiterStrokeRectIndexBuffer;
1.84 + GrIndexBuffer* fAABevelStrokeRectIndexBuffer;
1.85 +
1.86 + GrIndexBuffer* aaFillRectIndexBuffer(GrGpu* gpu);
1.87 +
1.88 + static int aaStrokeRectIndexCount(bool miterStroke);
1.89 + GrIndexBuffer* aaStrokeRectIndexBuffer(GrGpu* gpu, bool miterStroke);
1.90 +
1.91 + // TODO: Remove the useVertexCoverage boolean. Just use it all the time
1.92 + // since we now have a coverage vertex attribute
1.93 + void geometryFillAARect(GrGpu* gpu,
1.94 + GrDrawTarget* target,
1.95 + const SkRect& rect,
1.96 + const SkMatrix& combinedMatrix,
1.97 + const SkRect& devRect,
1.98 + bool useVertexCoverage);
1.99 +
1.100 + void shaderFillAARect(GrGpu* gpu,
1.101 + GrDrawTarget* target,
1.102 + const SkRect& rect,
1.103 + const SkMatrix& combinedMatrix);
1.104 +
1.105 + void shaderFillAlignedAARect(GrGpu* gpu,
1.106 + GrDrawTarget* target,
1.107 + const SkRect& rect,
1.108 + const SkMatrix& combinedMatrix);
1.109 +
1.110 + void geometryStrokeAARect(GrGpu* gpu,
1.111 + GrDrawTarget* target,
1.112 + const SkRect& devOutside,
1.113 + const SkRect& devOutsideAssist,
1.114 + const SkRect& devInside,
1.115 + bool useVertexCoverage,
1.116 + bool miterStroke);
1.117 +
1.118 + typedef SkRefCnt INHERITED;
1.119 +};
1.120 +
1.121 +#endif // GrAARectRenderer_DEFINED
