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 <string>
   9 #include "base/macros.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
  13 #include "gpu/command_buffer/service/gles2_cmd_validation.h"
  14 #include "gpu/config/gpu_driver_bug_workaround_type.h"
  15 #include "gpu/gpu_export.h"
  16
  17 namespace base {
  18 class CommandLine;
  19 }
  20
  21 namespace gfx {
  22 struct GLVersionInfo;
  23 }
  24
  25 namespace gpu {
  26 namespace gles2 {
  27
  28 // FeatureInfo records the features that are available for a ContextGroup.
  29 class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
  30  public:
  31   struct FeatureFlags {
  32     FeatureFlags();
  33
  34     bool chromium_color_buffer_float_rgba;
  35     bool chromium_color_buffer_float_rgb;
  36     bool chromium_framebuffer_multisample;
  37     bool chromium_sync_query;
  38     // Use glBlitFramebuffer() and glRenderbufferStorageMultisample() with
  39     // GL_EXT_framebuffer_multisample-style semantics, since they are exposed
  40     // as core GL functions on this implementation.
  41     bool use_core_framebuffer_multisample;
  42     bool multisampled_render_to_texture;
  43     // Use the IMG GLenum values and functions rather than EXT.
  44     bool use_img_for_multisampled_render_to_texture;
  45     bool oes_standard_derivatives;
  46     bool oes_egl_image_external;
  47     bool oes_depth24;
  48     bool oes_compressed_etc1_rgb8_texture;
  49     bool packed_depth24_stencil8;
  50     bool npot_ok;
  51     bool enable_texture_float_linear;
  52     bool enable_texture_half_float_linear;
  53     bool angle_translated_shader_source;
  54     bool angle_pack_reverse_row_order;
  55     bool arb_texture_rectangle;
  56     bool angle_instanced_arrays;
  57     bool occlusion_query_boolean;
  58     bool use_arb_occlusion_query2_for_occlusion_query_boolean;
  59     bool use_arb_occlusion_query_for_occlusion_query_boolean;
  60     bool native_vertex_array_object;
  61     bool ext_texture_format_astc;
  62     bool ext_texture_format_atc;
  63     bool ext_texture_format_bgra8888;
  64     bool ext_texture_format_dxt1;
  65     bool ext_texture_format_dxt5;
  66     bool enable_shader_name_hashing;
  67     bool enable_samplers;
  68     bool ext_draw_buffers;
  69     bool nv_draw_buffers;
  70     bool ext_frag_depth;
  71     bool ext_shader_texture_lod;
  72     bool use_async_readpixels;
  73     bool map_buffer_range;
  74     bool ext_discard_framebuffer;
  75     bool angle_depth_texture;
  76     bool is_swiftshader;
  77     bool angle_texture_usage;
  78     bool ext_texture_storage;
  79     bool chromium_path_rendering;
  80     bool blend_equation_advanced;
  81     bool blend_equation_advanced_coherent;
  82     bool ext_texture_rg;
  83     bool chromium_image_ycbcr_422;
  84     bool enable_subscribe_uniform;
  85     bool emulate_primitive_restart_fixed_index;
  86     bool ext_render_buffer_format_bgra8888;
  87   };
  88
  89   struct Workarounds {
  90     Workarounds();
  91
  92 #define GPU_OP(type, name) bool name;
  93     GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
  94 #undef GPU_OP
  95
  96     // Note: 0 here means use driver limit.
  97     GLint max_texture_size;
  98     GLint max_cube_map_texture_size;
  99     GLint max_fragment_uniform_vectors;
 100     GLint max_varying_vectors;
 101     GLint max_vertex_uniform_vectors;
 102     GLint max_copy_texture_chromium_size;
 103   };
 104
 105   // Constructor with workarounds taken from the current process's CommandLine
 106   FeatureInfo();
 107
 108   // Constructor with workarounds taken from |command_line|
 109   FeatureInfo(const base::CommandLine& command_line);
 110
 111   // Initializes the feature information. Needs a current GL context.
 112   bool Initialize();
 113   bool Initialize(const DisallowedFeatures& disallowed_features);
 114
 115   const Validators* validators() const {
 116     return &validators_;
 117   }
 118
 119   const std::string& extensions() const {
 120     return extensions_;
 121   }
 122
 123   const FeatureFlags& feature_flags() const {
 124     return feature_flags_;
 125   }
 126
 127   const Workarounds& workarounds() const {
 128     return workarounds_;
 129   }
 130
 131   const gfx::GLVersionInfo& gl_version_info() const {
 132     DCHECK(gl_version_info_.get());
 133     return *(gl_version_info_.get());
 134   }
 135
 136   bool IsES3Capable() const;
 137   void EnableES3Validators();
 138
 139   bool IsES3Enabled() const {
 140     return unsafe_es3_apis_enabled_;
 141   }
 142
 143   bool disable_shader_translator() const { return disable_shader_translator_; }
 144
 145  private:
 146   friend class base::RefCounted<FeatureInfo>;
 147   friend class BufferManagerClientSideArraysTest;
 148
 149   ~FeatureInfo();
 150
 151   void AddExtensionString(const char* s);
 152   void InitializeBasicState(const base::CommandLine* command_line);
 153   void InitializeFeatures();
 154
 155   Validators validators_;
 156
 157   DisallowedFeatures disallowed_features_;
 158
 159   // The extensions string returned by glGetString(GL_EXTENSIONS);
 160   std::string extensions_;
 161
 162   // Flags for some features
 163   FeatureFlags feature_flags_;
 164
 165   // Flags for Workarounds.
 166   Workarounds workarounds_;
 167
 168   // Whether the command line switch kEnableUnsafeES3APIs is passed in.
 169   bool enable_unsafe_es3_apis_switch_;
 170
 171   bool unsafe_es3_apis_enabled_;
 172
 173   // Whether the command line switch kEnableGLPathRendering is passed in.
 174   bool enable_gl_path_rendering_switch_;
 175
 176   bool disable_shader_translator_;
 177   scoped_ptr<gfx::GLVersionInfo> gl_version_info_;
 178
 179   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 180 };
 181
 182 }  // namespace gles2
 183 }  // namespace gpu
 184
 185 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_