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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 #ifndef GrAARectRenderer_DEFINED
      9 #define GrAARectRenderer_DEFINED
     10 
     11 #include "GrColor.h"
     12 #include "SkMatrix.h"
     13 #include "SkRect.h"
     14 #include "SkRefCnt.h"
     15 #include "SkStrokeRec.h"
     16 
     17 class GrClip;
     18 class GrDrawTarget;
     19 class GrIndexBuffer;
     20 class GrPipelineBuilder;
     21 
     22 /*
     23  * This class wraps helper functions that draw AA rects (filled & stroked)
     24  */
     25 class GrAARectRenderer : public SkRefCnt {
     26 public:
     27     SK_DECLARE_INST_COUNT(GrAARectRenderer)
     28 
     29     // TODO: potentialy fuse the fill & stroke methods and differentiate
     30     // between them by passing in stroke (==NULL means fill).
     31 
     32     void fillAARect(GrDrawTarget* target,
     33                     GrPipelineBuilder* pipelineBuilder,
     34                     GrColor color,
     35                     const SkMatrix& viewMatrix,
     36                     const SkRect& rect,
     37                     const SkRect& devRect) {
     38         this->geometryFillAARect(target, pipelineBuilder, color, viewMatrix, rect, devRect);
     39     }
     40 
     41     void strokeAARect(GrDrawTarget*,
     42                       GrPipelineBuilder*,
     43                       GrColor,
     44                       const SkMatrix& viewMatrix,
     45                       const SkRect& rect,
     46                       const SkRect& devRect,
     47                       const SkStrokeRec& stroke);
     48 
     49     // First rect is outer; second rect is inner
     50     void fillAANestedRects(GrDrawTarget*,
     51                            GrPipelineBuilder*,
     52                            GrColor,
     53                            const SkMatrix& viewMatrix,
     54                            const SkRect rects[2]);
     55 
     56 private:
     57     void geometryFillAARect(GrDrawTarget*,
     58                             GrPipelineBuilder*,
     59                             GrColor,
     60                             const SkMatrix& viewMatrix,
     61                             const SkRect& rect,
     62                             const SkRect& devRect);
     63 
     64     void geometryStrokeAARect(GrDrawTarget*,
     65                               GrPipelineBuilder*,
     66                               GrColor,
     67                               const SkMatrix& viewMatrix,
     68                               const SkRect& devOutside,
     69                               const SkRect& devOutsideAssist,
     70                               const SkRect& devInside,
     71                               bool miterStroke);
     72 
     73     typedef SkRefCnt INHERITED;
     74 };
     75 
     76 #endif // GrAARectRenderer_DEFINED
     77