File: multi_draw_manager.h

package info (click to toggle)
chromium 139.0.7258.127-1
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 6,122,068 kB
  • sloc: cpp: 35,100,771; ansic: 7,163,530; javascript: 4,103,002; python: 1,436,920; asm: 946,517; xml: 746,709; pascal: 187,653; perl: 88,691; sh: 88,436; objc: 79,953; sql: 51,488; cs: 44,583; fortran: 24,137; makefile: 22,147; tcl: 15,277; php: 13,980; yacc: 8,984; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (129 lines) | stat: -rw-r--r-- 4,216 bytes parent folder | download | duplicates (11)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GPU_COMMAND_BUFFER_SERVICE_MULTI_DRAW_MANAGER_H_
#define GPU_COMMAND_BUFFER_SERVICE_MULTI_DRAW_MANAGER_H_

#include <vector>

#include "gpu/gpu_gles2_export.h"

// Forwardly declare a few GL types to avoid including GL header files.
typedef unsigned GLenum;
typedef int GLsizei;
typedef int GLint;
typedef unsigned int GLuint;

namespace gpu {
namespace gles2 {

class GPU_GLES2_EXPORT MultiDrawManager {
 public:
  enum class DrawFunction {
    DrawArrays,
    DrawArraysInstanced,
    DrawArraysInstancedBaseInstance,
    DrawElements,
    DrawElementsInstanced,
    DrawElementsInstancedBaseVertexBaseInstance,
  };

  struct GPU_GLES2_EXPORT ResultData {
    DrawFunction draw_function;
    GLsizei drawcount = 0;
    GLenum mode = 0;
    GLenum type = 0;
    std::vector<GLint> firsts;
    std::vector<GLsizei> counts;
    std::vector<GLsizei> offsets;
    std::vector<const void*> indices;
    std::vector<GLsizei> instance_counts;
    std::vector<GLint> basevertices;
    std::vector<GLuint> baseinstances;

    ResultData();
    ~ResultData();
    ResultData(ResultData&& rhs);
    ResultData& operator=(ResultData&& rhs);
  };

  enum class IndexStorageType {
    Offset,
    Pointer,
  };

  MultiDrawManager(IndexStorageType index_type);

  bool Begin(GLsizei drawcount);
  bool End(ResultData* result);
  bool MultiDrawArrays(GLenum mode,
                       const GLint* firsts,
                       const GLsizei* counts,
                       GLsizei drawcount);
  bool MultiDrawArraysInstanced(GLenum mode,
                                const GLint* firsts,
                                const GLsizei* counts,
                                const GLsizei* instance_counts,
                                GLsizei drawcount);
  bool MultiDrawArraysInstancedBaseInstance(GLenum mode,
                                            const GLint* firsts,
                                            const GLsizei* counts,
                                            const GLsizei* instance_counts,
                                            const GLuint* baseinstances,
                                            GLsizei drawcount);
  bool MultiDrawElements(GLenum mode,
                         const GLsizei* counts,
                         GLenum type,
                         const GLsizei* offsets,
                         GLsizei drawcount);
  bool MultiDrawElementsInstanced(GLenum mode,
                                  const GLsizei* counts,
                                  GLenum type,
                                  const GLsizei* offsets,
                                  const GLsizei* instance_counts,
                                  GLsizei drawcount);
  bool MultiDrawElementsInstancedBaseVertexBaseInstance(
      GLenum mode,
      const GLsizei* counts,
      GLenum type,
      const GLsizei* offsets,
      const GLsizei* instance_counts,
      const GLint* basevertices,
      const GLuint* baseinstances,
      GLsizei drawcount);

 private:
  void ResizeArrays();
  bool ValidateDrawcount(GLsizei drawcount) const;
  bool EnsureDrawArraysFunction(DrawFunction draw_function,
                                GLenum mode,
                                GLsizei drawcount);
  bool EnsureDrawElementsFunction(DrawFunction draw_function,
                                  GLenum mode,
                                  GLenum type,
                                  GLsizei drawcount);
  void CopyArraysHelper(GLsizei drawcount,
                        const GLint* firsts,
                        const GLsizei* counts,
                        const GLsizei* offsets,
                        const GLsizei* instance_counts,
                        const GLint* basevertices,
                        const GLuint* baseinstances);

  enum class DrawState {
    Begin,
    Draw,
    End,
  };

  DrawState draw_state_;
  GLsizei current_draw_offset_;
  IndexStorageType index_type_;
  ResultData result_;
};

}  // namespace gles2
}  // namespace gpu

#endif  // GPU_COMMAND_BUFFER_SERVICE_MULTI_DRAW_MANAGER_H_