GrGLPathRange.h revision 36352bf5e38f45a70ee4f4fc132a38048d38206d 
1
2/*
3 * Copyright 2014 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9#ifndef GrGLPathRange_DEFINED
10#define GrGLPathRange_DEFINED
11
12#include "../GrPathRange.h"
13#include "gl/GrGLFunctions.h"
14
15class 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
23class GrGLPathRange : public GrPathRange {
24public:
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 SkStrokeRec&);
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 SkStrokeRec&);
41
42    GrGLuint basePathID() const { return fBasePathID; }
43
44protected:
45    void onInitPath(int index, const SkPath&) const override;
46
47    void onRelease() override;
48    void onAbandon() override;
49
50private:
51    size_t onGpuMemorySize() const override { return fGpuMemorySize; }
52
53    GrGLuint fBasePathID;
54    mutable size_t fGpuMemorySize;
55
56    typedef GrPathRange INHERITED;
57};
58
59#endif
60