kc3-lang/angle/include/platform/frontend_features.json

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• Hash : 6fddb18d
  Author :
  Date : 2024-07-26T12:44:23
  

  GL: Disable heavily emulated extensions for non-WebGL.
  
  The multidraw and base vertex base instance extensions are heavily
  emulated in ANGLE's GL backend, manipulating vertex arrays multiple
  times per draw. This is often a performance improvement for deep
  pipelines such as WebGL but slower for shallow stacks like Chrome's
  rasterization.
  
  Mark these extensions as "emulated" and disable them in the frontend
  for non-WebGL contexts. Only EXT_base_instance can have true native
  support.
  
  Add a frontend feature to re-enable these extensions and use it in the
  existing end2end tests.
  
  Bug: angleproject:355645824
  Change-Id: I897559fb270e2aa0f476d7784d25d97574e28f43
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5743837
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  

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• include/platform/frontend_features.json

• {
      "description": [
          "Copyright 2022 The ANGLE Project Authors. All rights reserved.",
          "Use of this source code is governed by a BSD-style license that can be",
          "found in the LICENSE file.",
          "",
          "frontend_features.json: Features/workarounds for driver bugs and other behaviors seen",
          "on all platforms."
      ],
      "features": [
          {
              "name": "lose_context_on_out_of_memory",
              "category": "Workarounds",
              "description": [
                  "Some users rely on a lost context notification if a GL_OUT_OF_MEMORY error occurs"
              ]
          },
          {
              "name": "disable_program_caching_for_transform_feedback",
              "category": "Workarounds",
              "description": [
                  "On some GPUs, program binaries don't contain transform feedback varyings"
              ]
          },
          {
              "name": "disable_program_binary",
              "category": "Features",
              "description": [
                  "Disable support for GL_OES_get_program_binary"
              ],
              "issue": "http://anglebug.com/42263580"
          },
          {
              "name": "disable_draw_buffers_indexed",
              "category": "Features",
              "description": [
                  "Disable support for OES_draw_buffers_indexed and EXT_draw_buffers_indexed"
              ],
              "issue": "http://anglebug.com/42266194"
          },
          {
              "name": "disable_anisotropic_filtering",
              "category": "Workarounds",
              "description": [
                  "Disable support for anisotropic filtering"
              ]
          },
          {
              "name": "allow_compressed_formats",
              "category": "Workarounds",
              "description": [
                  "Allow compressed formats"
              ]
          },
          {
              "name": "single_threaded_texture_decompression",
              "category": "Workarounds",
              "description": [
                  "Disables multi-threaded decompression of compressed texture formats"
              ]
          },
          {
              "name": "force_depth_attachment_init_on_clear",
              "category": "Workarounds",
              "description": [
                  "Force depth attachment initialization on clear ops"
              ],
              "issue": "https://anglebug.com/42265720"
          },
          {
              "name": "enable_capture_limits",
              "category": "Features",
              "description": [
                  "Set the context limits like frame capturing was enabled"
              ],
              "issue": "http://anglebug.com/42264287"
          },
          {
              "name": "force_robust_resource_init",
              "category": "Features",
              "description": [
                  "Force-enable robust resource init"
              ],
              "issue": "http://anglebug.com/42264571"
          },
          {
              "name": "force_init_shader_variables",
              "category": "Features",
              "description": [
                  "Force-enable shader variable initialization"
              ]
          },
          {
              "name": "enable_program_binary_for_capture",
              "category": "Features",
              "description": [
                  "Even if FrameCapture is enabled, enable GL_OES_get_program_binary"
              ],
              "issue": "http://anglebug.com/42264193"
          },
          {
              "name": "force_gl_error_checking",
              "category": "Features",
              "description": [
                  "Force GL error checking (i.e. prevent applications from disabling error checking"
              ],
              "issue": "https://issuetracker.google.com/220069903"
          },
          {
              "name": "emulate_pixel_local_storage",
              "category": "Features",
              "description": [
                  "Emulate ANGLE_shader_pixel_local_storage using shader images"
              ],
              "issue": "http://anglebug.com/40096838"
          },
          {
              "name": "cache_compiled_shader",
              "category": "Features",
              "description": [
                  "Enable to cache compiled shaders"
              ],
              "issue": "http://anglebug.com/42265509"
          },
          {
              "name": "dump_shader_source",
              "category": "Features",
              "description": [
                  "Write shader source to temp directory"
              ],
              "issue": "http://anglebug.com/42266231"
          },
          {
              "name": "enable_shader_substitution",
              "category": "Workarounds",
              "description": [
                  "Check the filesystem for shaders to use instead of those provided through glShaderSource"
              ],
              "issue": "http://anglebug.com/42266232"
          },
          {
              "name": "disable_program_caching",
              "category": "Features",
              "description": [
                  "Disables saving programs to the cache"
              ],
              "issue": "http://anglebug.com/1423136"
          },
          {
              "name": "dump_translated_shaders",
              "category": "Features",
              "description": [
                  "Write translated shaders to temp directory"
              ],
              "issue": "http://anglebug.com/40644912"
          },
          {
              "name": "enable_translated_shader_substitution",
              "category": "Workarounds",
              "description": [
                  "Check the filesystem for translated shaders to use instead of the shader translator's"
              ],
              "issue": "http://anglebug.com/40644912"
          },
          {
              "name": "compile_job_is_thread_safe",
              "category": "Features",
              "description": [
                  "If false, parts of the compile job cannot be parallelized"
              ],
              "issue": "http://anglebug.com/41488637"
          },
          {
              "name": "link_job_is_thread_safe",
              "category": "Features",
              "description": [
                  "If false, parts of the link job cannot be parallelized"
              ],
              "issue": "http://anglebug.com/41488637"
          },
          {
              "name": "always_run_link_sub_jobs_threaded",
              "category": "Features",
              "description": [
                  "If true, sub tasks of the link job are always threaded, regardless of GL_KHR_parallel_shader_compile"
              ],
              "issue": "http://anglebug.com/42266842"
          },
          {
              "name": "uncurrent_egl_surface_upon_surface_destroy",
              "category": "Workarounds",
              "description": [
                  "Make egl surface uncurrent when calling eglDestroySurface(), if the surface is still bound by the context of current render thread"
              ],
              "issue": "https://issuetracker.google.com/292285899"
          },
          {
              "name": "force_minimum_max_vertex_attributes",
              "category": "Features",
              "description": [
                  "Force the minimum GL_MAX_VERTEX_ATTRIBS that the context's client version allows."
              ],
              "issue": ""
          },
          {
              "name": "force_flush_after_drawcall_using_shadowmap",
              "category": "Workarounds",
              "description": [
                  "Force flush after drawcall use shadow map for intel device."
              ],
              "issue": "https://issuetracker.google.com/349489248"
          },
          {
              "name": "reject_webgl_shaders_with_undefined_behavior",
              "category": "Workarounds",
              "description": [
                  "Attempts to detect undefined behavior when in WebGL mode and reject shaders if any detected."
              ],
              "issue": "http://crbug.com/350528343"
          },
          {
              "name": "always_enable_emulated_multidraw_extensions",
              "category": "Workarounds",
              "description": [
                  "Enable multi-draw and base vertex base instance extensions for non-WebGL contexts if they are emulated."
              ],
              "issue": "http://anglebug.com/355645824"
          }
      ]
  }
  

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