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
  18 namespace base {
  19 class CommandLine;
  20 }
  21
  22 namespace gpu {
  23 namespace gles2 {
  24
  25 // FeatureInfo records the features that are available for a ContextGroup.
  26 class 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 std::string& str);
 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_