1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
6#define GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
7
8#include <set>
9#include <string>
10#include "base/containers/hash_tables.h"
11#include "base/memory/ref_counted.h"
12#include "base/sys_info.h"
13#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
14#include "gpu/command_buffer/service/gles2_cmd_validation.h"
15#include "gpu/config/gpu_driver_bug_workaround_type.h"
16#include "gpu/gpu_export.h"
17
18class CommandLine;
19
20namespace gpu {
21namespace gles2 {
22
23// FeatureInfo records the features that are available for a ContextGroup.
24class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
25 public:
26  struct FeatureFlags {
27    FeatureFlags();
28
29    bool chromium_framebuffer_multisample;
30    // Use glBlitFramebuffer() and glRenderbufferStorageMultisample() with
31    // GL_EXT_framebuffer_multisample-style semantics, since they are exposed
32    // as core GL functions on this implementation.
33    bool use_core_framebuffer_multisample;
34    bool multisampled_render_to_texture;
35    // Use the IMG GLenum values and functions rather than EXT.
36    bool use_img_for_multisampled_render_to_texture;
37    bool oes_standard_derivatives;
38    bool oes_egl_image_external;
39    bool oes_depth24;
40    bool oes_compressed_etc1_rgb8_texture;
41    bool packed_depth24_stencil8;
42    bool npot_ok;
43    bool enable_texture_float_linear;
44    bool enable_texture_half_float_linear;
45    bool chromium_stream_texture;
46    bool angle_translated_shader_source;
47    bool angle_pack_reverse_row_order;
48    bool arb_texture_rectangle;
49    bool angle_instanced_arrays;
50    bool occlusion_query_boolean;
51    bool use_arb_occlusion_query2_for_occlusion_query_boolean;
52    bool use_arb_occlusion_query_for_occlusion_query_boolean;
53    bool native_vertex_array_object;
54    bool ext_texture_format_bgra8888;
55    bool enable_shader_name_hashing;
56    bool enable_samplers;
57    bool ext_draw_buffers;
58    bool ext_frag_depth;
59    bool use_async_readpixels;
60    bool map_buffer_range;
61    bool ext_discard_framebuffer;
62    bool angle_depth_texture;
63    bool is_angle;
64    bool is_swiftshader;
65    bool angle_texture_usage;
66    bool ext_texture_storage;
67  };
68
69  struct Workarounds {
70    Workarounds();
71
72#define GPU_OP(type, name) bool name;
73    GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
74#undef GPU_OP
75
76    // Note: 0 here means use driver limit.
77    GLint max_texture_size;
78    GLint max_cube_map_texture_size;
79  };
80
81  // Constructor with workarounds taken from the current process's CommandLine
82  FeatureInfo();
83
84  // Constructor with workarounds taken from |command_line|
85  FeatureInfo(const CommandLine& command_line);
86
87  // Initializes the feature information. Needs a current GL context.
88  bool Initialize();
89  bool Initialize(const DisallowedFeatures& disallowed_features);
90
91  const Validators* validators() const {
92    return &validators_;
93  }
94
95  const ValueValidator<GLenum>& GetTextureFormatValidator(GLenum format) {
96    return texture_format_validators_[format];
97  }
98
99  const std::string& extensions() const {
100    return extensions_;
101  }
102
103  const FeatureFlags& feature_flags() const {
104    return feature_flags_;
105  }
106
107  const Workarounds& workarounds() const {
108    return workarounds_;
109  }
110
111 private:
112  friend class base::RefCounted<FeatureInfo>;
113  friend class BufferManagerClientSideArraysTest;
114  friend class GLES2DecoderTestBase;
115
116  typedef base::hash_map<GLenum, ValueValidator<GLenum> > ValidatorMap;
117  ValidatorMap texture_format_validators_;
118
119  ~FeatureInfo();
120
121  void AddExtensionString(const std::string& str);
122  void InitializeBasicState(const CommandLine& command_line);
123  void InitializeFeatures();
124
125  Validators validators_;
126
127  DisallowedFeatures disallowed_features_;
128
129  // The extensions string returned by glGetString(GL_EXTENSIONS);
130  std::string extensions_;
131
132  // Flags for some features
133  FeatureFlags feature_flags_;
134
135  // Flags for Workarounds.
136  Workarounds workarounds_;
137
138  DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
139};
140
141}  // namespace gles2
142}  // namespace gpu
143
144#endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
145