gpu/command_buffer/service/feature_info.h

   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 #include "ui/gl/gl_version_info.h"
  18
  19 namespace base {
  20 class CommandLine;
  21 }
  22
  23 namespace gpu {
  24 namespace gles2 {
  25
  26 // FeatureInfo records the features that are available for a ContextGroup.
  27 class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
  28  public:
  29   struct FeatureFlags {
  30     FeatureFlags();
  31
  32     bool chromium_color_buffer_float_rgba;
  33     bool chromium_color_buffer_float_rgb;
  34     bool chromium_framebuffer_multisample;
  35     bool chromium_sync_query;
  36     // Use glBlitFramebuffer() and glRenderbufferStorageMultisample() with
  37     // GL_EXT_framebuffer_multisample-style semantics, since they are exposed
  38     // as core GL functions on this implementation.
  39     bool use_core_framebuffer_multisample;
  40     bool multisampled_render_to_texture;
  41     // Use the IMG GLenum values and functions rather than EXT.
  42     bool use_img_for_multisampled_render_to_texture;
  43     bool oes_standard_derivatives;
  44     bool oes_egl_image_external;
  45     bool oes_depth24;
  46     bool oes_compressed_etc1_rgb8_texture;
  47     bool packed_depth24_stencil8;
  48     bool npot_ok;
  49     bool enable_texture_float_linear;
  50     bool enable_texture_half_float_linear;
  51     bool angle_translated_shader_source;
  52     bool angle_pack_reverse_row_order;
  53     bool arb_texture_rectangle;
  54     bool angle_instanced_arrays;
  55     bool occlusion_query_boolean;
  56     bool use_arb_occlusion_query2_for_occlusion_query_boolean;
  57     bool use_arb_occlusion_query_for_occlusion_query_boolean;
  58     bool native_vertex_array_object;
  59     bool ext_texture_format_atc;
  60     bool ext_texture_format_bgra8888;
  61     bool ext_texture_format_dxt1;
  62     bool ext_texture_format_dxt5;
  63     bool enable_shader_name_hashing;
  64     bool enable_samplers;
  65     bool ext_draw_buffers;
  66     bool nv_draw_buffers;
  67     bool ext_frag_depth;
  68     bool ext_shader_texture_lod;
  69     bool use_async_readpixels;
  70     bool map_buffer_range;
  71     bool ext_discard_framebuffer;
  72     bool angle_depth_texture;
  73     bool is_swiftshader;
  74     bool angle_texture_usage;
  75     bool ext_texture_storage;
  76     bool chromium_path_rendering;
  77     bool blend_equation_advanced;
  78     bool blend_equation_advanced_coherent;
  79     bool ext_texture_rg;
  80     bool enable_subscribe_uniform;
  81   };
  82
  83   struct Workarounds {
  84     Workarounds();
  85
  86 #define GPU_OP(type, name) bool name;
  87     GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
  88 #undef GPU_OP
  89
  90     // Note: 0 here means use driver limit.
  91     GLint max_texture_size;
  92     GLint max_cube_map_texture_size;
  93     GLint max_fragment_uniform_vectors;
  94     GLint max_varying_vectors;
  95     GLint max_vertex_uniform_vectors;
  96   };
  97
  98   // Constructor with workarounds taken from the current process's CommandLine
  99   FeatureInfo();
 100
 101   // Constructor with workarounds taken from |command_line|
 102   FeatureInfo(const base::CommandLine& command_line);
 103
 104   // Initializes the feature information. Needs a current GL context.
 105   bool Initialize();
 106   bool Initialize(const DisallowedFeatures& disallowed_features);
 107
 108   const Validators* validators() const {
 109     return &validators_;
 110   }
 111
 112   const ValueValidator<GLenum>& GetTextureFormatValidator(GLenum format) {
 113     return texture_format_validators_[format];
 114   }
 115
 116   const std::string& extensions() const {
 117     return extensions_;
 118   }
 119
 120   const FeatureFlags& feature_flags() const {
 121     return feature_flags_;
 122   }
 123
 124   const Workarounds& workarounds() const {
 125     return workarounds_;
 126   }
 127
 128   const gfx::GLVersionInfo& gl_version_info() const {
 129     DCHECK(gl_version_info_.get());
 130     return *(gl_version_info_.get());
 131   }
 132
 133   bool IsES3Capable() const;
 134   void EnableES3Validators();
 135
 136  private:
 137   friend class base::RefCounted<FeatureInfo>;
 138   friend class BufferManagerClientSideArraysTest;
 139
 140   typedef base::hash_map<GLenum, ValueValidator<GLenum> > ValidatorMap;
 141   ValidatorMap texture_format_validators_;
 142
 143   ~FeatureInfo();
 144
 145   void AddExtensionString(const char* s);
 146   void InitializeBasicState(const base::CommandLine& command_line);
 147   void InitializeFeatures();
 148
 149   Validators validators_;
 150
 151   DisallowedFeatures disallowed_features_;
 152
 153   // The extensions string returned by glGetString(GL_EXTENSIONS);
 154   std::string extensions_;
 155
 156   // Flags for some features
 157   FeatureFlags feature_flags_;
 158
 159   // Flags for Workarounds.
 160   Workarounds workarounds_;
 161
 162   scoped_ptr<gfx::GLVersionInfo> gl_version_info_;
 163
 164   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 165 };
 166
 167 }  // namespace gles2
 168 }  // namespace gpu
 169
 170 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_