src/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 class CommandLine;
  19
  20 namespace gpu {
  21 namespace gles2 {
  22
  23 // FeatureInfo records the features that are available for a ContextGroup.
  24 class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
  25  public:
  26   struct FeatureFlags {
  27     FeatureFlags();
  28
  29     bool chromium_framebuffer_multisample;
  30     bool multisampled_render_to_texture;
  31     // Use the IMG GLenum values and functions rather than EXT.
  32     bool use_img_for_multisampled_render_to_texture;
  33     bool oes_standard_derivatives;
  34     bool oes_egl_image_external;
  35     bool oes_depth24;
  36     bool npot_ok;
  37     bool enable_texture_float_linear;
  38     bool enable_texture_half_float_linear;
  39     bool chromium_stream_texture;
  40     bool angle_translated_shader_source;
  41     bool angle_pack_reverse_row_order;
  42     bool arb_texture_rectangle;
  43     bool angle_instanced_arrays;
  44     bool occlusion_query_boolean;
  45     bool use_arb_occlusion_query2_for_occlusion_query_boolean;
  46     bool use_arb_occlusion_query_for_occlusion_query_boolean;
  47     bool native_vertex_array_object;
  48     bool enable_shader_name_hashing;
  49     bool enable_samplers;
  50     bool ext_draw_buffers;
  51     bool ext_frag_depth;
  52     bool use_async_readpixels;
  53     bool map_buffer_range;
  54     bool ext_discard_framebuffer;
  55   };
  56
  57   struct Workarounds {
  58     Workarounds();
  59
  60 #define GPU_OP(type, name) bool name;
  61     GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
  62 #undef GPU_OP
  63
  64     // Note: 0 here means use driver limit.
  65     GLint max_texture_size;
  66     GLint max_cube_map_texture_size;
  67   };
  68
  69   // Constructor with workarounds taken from the current process's CommandLine
  70   FeatureInfo();
  71
  72   // Constructor with workarounds taken from |command_line|
  73   FeatureInfo(const CommandLine& command_line);
  74
  75   // Initializes the feature information. Needs a current GL context.
  76   bool Initialize();
  77   bool Initialize(const DisallowedFeatures& disallowed_features);
  78
  79   const Validators* validators() const {
  80     return &validators_;
  81   }
  82
  83   const ValueValidator<GLenum>& GetTextureFormatValidator(GLenum format) {
  84     return texture_format_validators_[format];
  85   }
  86
  87   const std::string& extensions() const {
  88     return extensions_;
  89   }
  90
  91   const FeatureFlags& feature_flags() const {
  92     return feature_flags_;
  93   }
  94
  95   const Workarounds& workarounds() const {
  96     return workarounds_;
  97   }
  98
  99  private:
 100   friend class base::RefCounted<FeatureInfo>;
 101   friend class BufferManagerClientSideArraysTest;
 102   friend class GLES2DecoderTestBase;
 103
 104   typedef base::hash_map<GLenum, ValueValidator<GLenum> > ValidatorMap;
 105   ValidatorMap texture_format_validators_;
 106
 107   ~FeatureInfo();
 108
 109   void AddExtensionString(const std::string& str);
 110   void InitializeBasicState(const CommandLine& command_line);
 111   void InitializeFeatures();
 112
 113   Validators validators_;
 114
 115   DisallowedFeatures disallowed_features_;
 116
 117   // The extensions string returned by glGetString(GL_EXTENSIONS);
 118   std::string extensions_;
 119
 120   // Flags for some features
 121   FeatureFlags feature_flags_;
 122
 123   // Flags for Workarounds.
 124   Workarounds workarounds_;
 125
 126   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 127 };
 128
 129 }  // namespace gles2
 130 }  // namespace gpu
 131
 132 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_