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
18namespace base {
19class CommandLine;
20}
21
22namespace gpu {
23namespace gles2 {
24
25// FeatureInfo records the features that are available for a ContextGroup.
26class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
27 public:
28  struct FeatureFlags {
29    FeatureFlags();
30
31    bool chromium_color_buffer_float_rgba;
32    bool chromium_color_buffer_float_rgb;
33    bool chromium_framebuffer_multisample;
34    bool chromium_sync_query;
35    // Use glBlitFramebuffer() and glRenderbufferStorageMultisample() with
36    // GL_EXT_framebuffer_multisample-style semantics, since they are exposed
37    // as core GL functions on this implementation.
38    bool use_core_framebuffer_multisample;
39    bool multisampled_render_to_texture;
40    // Use the IMG GLenum values and functions rather than EXT.
41    bool use_img_for_multisampled_render_to_texture;
42    bool oes_standard_derivatives;
43    bool oes_egl_image_external;
44    bool oes_depth24;
45    bool oes_compressed_etc1_rgb8_texture;
46    bool packed_depth24_stencil8;
47    bool npot_ok;
48    bool enable_texture_float_linear;
49    bool enable_texture_half_float_linear;
50    bool angle_translated_shader_source;
51    bool angle_pack_reverse_row_order;
52    bool arb_texture_rectangle;
53    bool angle_instanced_arrays;
54    bool occlusion_query_boolean;
55    bool use_arb_occlusion_query2_for_occlusion_query_boolean;
56    bool use_arb_occlusion_query_for_occlusion_query_boolean;
57    bool native_vertex_array_object;
58    bool ext_texture_format_bgra8888;
59    bool enable_shader_name_hashing;
60    bool enable_samplers;
61    bool ext_draw_buffers;
62    bool ext_frag_depth;
63    bool ext_shader_texture_lod;
64    bool use_async_readpixels;
65    bool map_buffer_range;
66    bool ext_discard_framebuffer;
67    bool angle_depth_texture;
68    bool is_angle;
69    bool is_swiftshader;
70    bool angle_texture_usage;
71    bool ext_texture_storage;
72    bool chromium_path_rendering;
73  };
74
75  struct Workarounds {
76    Workarounds();
77
78#define GPU_OP(type, name) bool name;
79    GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
80#undef GPU_OP
81
82    // Note: 0 here means use driver limit.
83    GLint max_texture_size;
84    GLint max_cube_map_texture_size;
85    GLint max_fragment_uniform_vectors;
86    GLint max_varying_vectors;
87    GLint max_vertex_uniform_vectors;
88  };
89
90  // Constructor with workarounds taken from the current process's CommandLine
91  FeatureInfo();
92
93  // Constructor with workarounds taken from |command_line|
94  FeatureInfo(const base::CommandLine& command_line);
95
96  // Initializes the feature information. Needs a current GL context.
97  bool Initialize();
98  bool Initialize(const DisallowedFeatures& disallowed_features);
99
100  const Validators* validators() const {
101    return &validators_;
102  }
103
104  const ValueValidator<GLenum>& GetTextureFormatValidator(GLenum format) {
105    return texture_format_validators_[format];
106  }
107
108  const std::string& extensions() const {
109    return extensions_;
110  }
111
112  const FeatureFlags& feature_flags() const {
113    return feature_flags_;
114  }
115
116  const Workarounds& workarounds() const {
117    return workarounds_;
118  }
119
120 private:
121  friend class base::RefCounted<FeatureInfo>;
122  friend class BufferManagerClientSideArraysTest;
123
124  typedef base::hash_map<GLenum, ValueValidator<GLenum> > ValidatorMap;
125  ValidatorMap texture_format_validators_;
126
127  ~FeatureInfo();
128
129  void AddExtensionString(const char* s);
130  void InitializeBasicState(const base::CommandLine& command_line);
131  void InitializeFeatures();
132
133  Validators validators_;
134
135  DisallowedFeatures disallowed_features_;
136
137  // The extensions string returned by glGetString(GL_EXTENSIONS);
138  std::string extensions_;
139
140  // Flags for some features
141  FeatureFlags feature_flags_;
142
143  // Flags for Workarounds.
144  Workarounds workarounds_;
145
146  DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
147};
148
149}  // namespace gles2
150}  // namespace gpu
151
152#endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
153