1 /*
2  * Copyright 2014 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 GrGLPathRange_DEFINED
9 #define GrGLPathRange_DEFINED
10 
11 #include "../GrPathRange.h"
12 #include "GrStyle.h"
13 #include "gl/GrGLTypes.h"
14 
15 class GrGLGpu;
16 
17 /**
18  * Currently this represents a range of GL_NV_path_rendering Path IDs. If we
19  * support other GL path extensions then this would have to have a type enum
20  * and/or be subclassed.
21  */
22 
23 class GrGLPathRange : public GrPathRange {
24 public:
25     /**
26      * Initialize a GL path range from a PathGenerator. This class will allocate
27      * the GPU path objects and initialize them lazily.
28      */
29     GrGLPathRange(GrGLGpu*, PathGenerator*, const GrStyle&);
30 
31     /**
32      * Initialize a GL path range from an existing range of pre-initialized GPU
33      * path objects. This class assumes ownership of the GPU path objects and
34      * will delete them when done.
35      */
36     GrGLPathRange(GrGLGpu*,
37                   GrGLuint basePathID,
38                   int numPaths,
39                   size_t gpuMemorySize,
40                   const GrStyle&);
41 
42     GrGLuint basePathID() const { return fBasePathID; }
43 
44     bool shouldStroke() const { return fShouldStroke; }
45     bool shouldFill() const { return fShouldFill; }
46 
47 protected:
48     void onInitPath(int index, const SkPath&) const override;
49 
50     void onRelease() override;
51     void onAbandon() override;
52 
53 private:
54     void init();
55     size_t onGpuMemorySize() const override { return fGpuMemorySize; }
56 
57     const GrStyle fStyle;
58     GrGLuint fBasePathID;
59     mutable size_t fGpuMemorySize;
60     bool fShouldStroke;
61     bool fShouldFill;
62 
63     typedef GrPathRange INHERITED;
64 };
65 
66 #endif
67