{
    "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.",
        "",
        "vk_features.json: Optional features for the Vulkan renderer."
    ],
    "features": [
        {
            "name": "basic_GL_line_rasterization",
            "category": "Features",
            "description": [
                "Enable the use of pixel shader patching to implement OpenGL basic line ",
                "rasterization rules"
            ]
        },
        {
            "name": "bresenham_line_rasterization",
            "category": "Features",
            "description": [
                "Enable Bresenham line rasterization via VK_EXT_line_rasterization extension"
            ]
        },
        {
            "name": "provoking_vertex",
            "category": "Features",
            "description": [
                "Enable provoking vertex mode via VK_EXT_provoking_vertex extension"
            ]
        },
        {
            "name": "force_fallback_format",
            "category": "Workarounds",
            "description": [
                "Force a fallback format for angle_end2end_tests"
            ]
        },
        {
            "name": "clamp_point_size",
            "category": "Workarounds",
            "description": [
                "The point size range reported from the API is inconsistent with the actual behavior"
            ],
            "issue": "http://anglebug.com/2970"
        },
        {
            "name": "depth_clamping",
            "category": "Workarounds",
            "description": [
                "The depth value is not clamped to [0,1] for floating point depth buffers."
            ],
            "issue": "http://anglebug.com/3970"
        },
        {
            "name": "supports_renderpass2",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_create_renderpass2 extension"
            ]
        },
        {
            "name": "supports_incremental_present",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_incremental_present extension"
            ]
        },
        {
            "name": "supports_android_hardware_buffer",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_ANDROID_external_memory_android_hardware_buffer extension"
            ]
        },
        {
            "name": "supports_GGP_frame_token",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_GGP_frame_token extension"
            ]
        },
        {
            "name": "supports_external_memory_fd",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_external_memory_fd extension"
            ]
        },
        {
            "name": "supports_external_memory_fuchsia",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_FUCHSIA_external_memory extension"
            ]
        },
        {
            "name": "supports_filtering_precision",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_GOOGLE_sampler_filtering_precision extension"
            ]
        },
        {
            "name": "supports_external_fence_capabilities",
            "category": "Features",
            "description": [
                "VkInstance supports the VK_KHR_external_fence_capabilities extension"
            ]
        },
        {
            "name": "supports_external_semaphore_capabilities",
            "category": "Features",
            "description": [
                "VkInstance supports the VK_KHR_external_semaphore_capabilities extension"
            ]
        },
        {
            "name": "supports_external_semaphore_fd",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_external_semaphore_fd extension"
            ]
        },
        {
            "name": "supports_external_semaphore_fuchsia",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_FUCHSIA_external_semaphore extension"
            ]
        },
        {
            "name": "supports_external_fence_fd",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_external_fence_fd extension"
            ],
            "issue": "http://anglebug.com/2517"
        },
        {
            "name": "supports_android_native_fence_sync",
            "category": "Features",
            "description": [
                "VkDevice supports the EGL_ANDROID_native_fence_sync extension"
            ],
            "issue": "http://anglebug.com/2517"
        },
        {
            "name": "supports_image_cube_array",
            "category": "Features",
            "description": [
                "VkDevice supports the imageCubeArray feature properly"
            ],
            "issue": "http://anglebug.com/3584"
        },
        {
            "name": "supports_pipeline_statistics_query",
            "category": "Features",
            "description": [
                "VkDevice supports the pipelineStatisticsQuery feature"
            ],
            "issue": "http://anglebug.com/5430"
        },
        {
            "name": "supports_shader_stencil_export",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_EXT_shader_stencil_export extension"
            ]
        },
        {
            "name": "supports_YUV_sampler_conversion",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_sampler_ycbcr_conversion extension"
            ]
        },
        {
            "name": "emulate_transform_feedback",
            "category": "Features",
            "description": [
                "Emulate transform feedback as the VK_EXT_transform_feedback is not present."
            ],
            "issue": "http://anglebug.com/3205"
        },
        {
            "name": "supports_transform_feedback_extension",
            "category": "Features",
            "description": [
                "Transform feedback uses the VK_EXT_transform_feedback extension."
            ],
            "issue": "http://anglebug.com/3206"
        },
        {
            "name": "supports_geometry_streams_capability",
            "category": "Features",
            "description": [
                "Implementation supports the GeometryStreams SPIR-V capability."
            ],
            "issue": "http://anglebug.com/3206"
        },
        {
            "name": "supports_index_type_uint8",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_EXT_index_type_uint8 extension"
            ],
            "issue": "http://anglebug.com/4405"
        },
        {
            "name": "supports_custom_border_color",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_EXT_custom_border_color extension"
            ],
            "issue": "http://anglebug.com/3577"
        },
        {
            "name": "supports_multi_draw_indirect",
            "category": "Features",
            "description": [
                "VkDevice supports the multiDrawIndirect extension"
            ],
            "issue": "http://anglebug.com/6439"
        },
        {
            "name": "supports_depth_stencil_resolve",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_depth_stencil_resolve ",
                "extension with the independentResolveNone feature"
            ],
            "issue": "http://anglebug.com/4836"
        },
        {
            "name": "supports_multisampled_render_to_single_sampled",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_EXT_multisampled_render_to_single_sampled extension"
            ],
            "issue": "http://anglebug.com/4836"
        },
        {
            "name": "supports_multiview",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_multiview extension"
            ],
            "issue": "http://anglebug.com/6048"
        },
        {
            "name": "disable_fifo_present_mode",
            "category": "Workarounds",
            "description": [
                "VK_PRESENT_MODE_FIFO_KHR causes random timeouts"
            ],
            "issue": "http://anglebug.com/3153"
        },
        {
            "name": "bind_empty_for_unused_descriptor_sets",
            "category": "Workarounds",
            "description": [
                "Gaps in bound descriptor set indices causes the post-gap sets to misbehave"
            ],
            "issue": "http://anglebug.com/2727"
        },
        {
            "name": "force_D16_tex_filter",
            "category": "Workarounds",
            "description": [
                "VK_FORMAT_D16_UNORM does not support VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT, ",
                "which prevents OES_depth_texture from being supported."
            ],
            "issue": "http://anglebug.com/3452"
        },
        {
            "name": "disable_flipping_blit_with_command",
            "category": "Workarounds",
            "description": [
                "vkCmdBlitImage with flipped coordinates blits incorrectly."
            ],
            "issue": "http://anglebug.com/3498"
        },
        {
            "name": "per_frame_window_size_query",
            "category": "Workarounds",
            "description": [
                "Vulkan swapchain is not returning VK_ERROR_OUT_OF_DATE when window resizing"
            ],
            "issue": "http://anglebug.com/3623, http://anglebug.com/3624, http://anglebug.com/3625"
        },
        {
            "name": "pad_buffers_to_max_vertex_attrib_stride",
            "category": "Workarounds",
            "description": [
                "Vulkan considers vertex attribute accesses to count up to the last multiple of the ",
                "stride. This additional access supports AMD's robust buffer access implementation. ",
                "AMDVLK in particular will return incorrect values when the vertex access extends into ",
                "the range that would be the stride padding and the buffer is too small. ",
                "This workaround limits GL_MAX_VERTEX_ATTRIB_STRIDE to a maximum value and ",
                "pads up every buffer allocation size to be a multiple of the maximum stride."
            ],
            "issue": "http://anglebug.com/4428"
        },
        {
            "name": "supports_external_memory_dma_buf_and_modifiers",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_EXT_external_memory_dma_buf and VK_EXT_image_drm_format_modifier ",
                "extensions"
            ],
            "issue": "http://anglebug.com/6248"
        },
        {
            "name": "supports_external_memory_host",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_EXT_external_memory_host extension"
            ]
        },
        {
            "name": "allocate_non_zero_memory",
            "category": "Features",
            "description": [
                "Fill new allocations with non-zero values to flush out errors."
            ],
            "issue": "http://anglebug.com/4384"
        },
        {
            "name": "log_memory_report_callbacks",
            "category": "Features",
            "description": [
                "Log each callback from VK_EXT_device_memory_report"
            ]
        },
        {
            "name": "log_memory_report_stats",
            "category": "Features",
            "description": [
                "Log stats from VK_EXT_device_memory_report each swap"
            ]
        },
        {
            "name": "shadow_buffers",
            "category": "Features",
            "description": [
                "Allocate a shadow buffer for GL buffer objects to reduce glMap* latency."
            ],
            "issue": "http://anglebug.com/4339"
        },
        {
            "name": "prefer_CPU_for_buffer_sub_data",
            "category": "Features",
            "description": [
                "Prefer use CPU to do bufferSubData instead of staged update."
            ],
            "issue": "http://issuetracker.google.com/200067929"
        },
        {
            "name": "persistently_mapped_buffers",
            "category": "Features",
            "description": [
                "Persistently map buffer memory to reduce map/unmap IOCTL overhead."
            ],
            "issue": "http://anglebug.com/2162"
        },
        {
            "name": "enable_pre_rotate_surfaces",
            "category": "Features",
            "description": [
                "Enable Android pre-rotation for landscape applications"
            ],
            "issue": "http://anglebug.com/3502"
        },
        {
            "name": "enable_precision_qualifiers",
            "category": "Features",
            "description": [
                "Enable precision qualifiers in shaders"
            ],
            "issue": "http://anglebug.com/3078"
        },
        {
            "name": "prefer_aggregate_barrier_calls",
            "category": "Workarounds",
            "description": [
                "Single barrier call is preferred over multiple calls with ",
                "fine grained pipeline stage dependency information"
            ],
            "issue": "http://anglebug.com/4633"
        },
        {
            "name": "prefer_skipping_invalidate_for_emulated_formats",
            "category": "Workarounds",
            "description": [
                "Skipping invalidate is preferred for emulated formats that have extra channels over ",
                "re-clearing the image"
            ],
            "issue": "http://anglebug.com/6860"
        },
        {
            "name": "async_command_queue",
            "category": "Features",
            "description": [
                "Use CommandQueue worker thread to dispatch work to GPU."
            ],
            "issue": "http://anglebug.com/4324"
        },
        {
            "name": "supports_shader_float16",
            "category": "Features",
            "description": [
                "VkDevice supports the VK_KHR_shader_float16_int8 extension ",
                "and has the shaderFloat16 feature"
            ],
            "issue": "http://anglebug.com/4551"
        },
        {
            "name": "allow_GenerateMipmap_with_compute",
            "category": "Features",
            "description": [
                "Use the compute path to generate mipmaps on devices that meet the minimum requirements, ",
                "and the performance is better."
            ],
            "issue": "http://anglebug.com/4551"
        },
        {
            "name": "supports_render_pass_store_op_none",
            "category": "Features",
            "description": [
                "VkDevice supports VK_QCOM_render_pass_store_ops extension."
            ],
            "issue": "http://anglebug.com/5055"
        },
        {
            "name": "supports_render_pass_load_store_op_none",
            "category": "Features",
            "description": [
                "VkDevice supports VK_EXT_load_store_op_none extension."
            ],
            "issue": "http://anglebug.com/5371"
        },
        {
            "name": "supports_depth_clip_control",
            "category": "Features",
            "description": [
                "VkDevice supports VK_EXT_depth_clip_control extension."
            ],
            "issue": "http://anglebug.com/5421"
        },
        {
            "name": "supports_blend_operation_advanced",
            "category": "Features",
            "description": [
                "VkDevice supports VK_EXT_blend_operation_advanced extension."
            ],
            "issue": "http://anglebug.com/3586"
        },
        {
            "name": "force_max_uniform_buffer_size_16KB",
            "category": "Workarounds",
            "description": [
                "Force max uniform buffer size to 16K on some device due to bug"
            ],
            "issue": "https://issuetracker.google.com/161903006"
        },
        {
            "name": "supports_image_format_list",
            "category": "Features",
            "description": [
                "Enable VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT by default for ICDs ",
                "that support VK_KHR_image_format_list"
            ],
            "issue": "http://anglebug.com/5281"
        },
        {
            "name": "enable_multisampled_render_to_texture",
            "category": "Workarounds",
            "description": [
                "Expose EXT_multisampled_render_to_texture"
            ],
            "issue": "http://anglebug.com/4937"
        },
        {
            "name": "defer_flush_until_end_render_pass",
            "category": "Workarounds",
            "description": [
                "Allow glFlush to be deferred until renderpass ends"
            ],
            "issue": "https://issuetracker.google.com/issues/166475273"
        },
        {
            "name": "wait_idle_before_swapchain_recreation",
            "category": "Workarounds",
            "description": [
                "Before passing an oldSwapchain to VkSwapchainCreateInfoKHR, wait for queue to be idle. ",
                "Works around a bug on platforms which destroy oldSwapchain in vkCreateSwapchainKHR."
            ],
            "issue": "http://anglebug.com/5061"
        },
        {
            "name": "force_texture_lod_offset_1",
            "category": "Workarounds",
            "description": [
                "Increase the minimum texture level-of-detail by 1 when sampling."
            ]
        },
        {
            "name": "force_texture_lod_offset_2",
            "category": "Workarounds",
            "description": [
                "Increase the minimum texture level-of-detail by 2 when sampling."
            ]
        },
        {
            "name": "force_texture_lod_offset_3",
            "category": "Workarounds",
            "description": [
                "Increase the minimum texture level-of-detail by 3 when sampling."
            ]
        },
        {
            "name": "force_texture_lod_offset_4",
            "category": "Workarounds",
            "description": [
                "Increase the minimum texture level-of-detail by 4 when sampling."
            ]
        },
        {
            "name": "force_nearest_filtering",
            "category": "Workarounds",
            "description": [
                "Force nearest filtering when sampling."
            ]
        },
        {
            "name": "force_nearest_mip_filtering",
            "category": "Workarounds",
            "description": [
                "Force nearest mip filtering when sampling."
            ]
        },
        {
            "name": "compress_vertex_data",
            "category": "Workarounds",
            "description": [
                "Compress vertex data to smaller data types when ",
                "possible. Using this feature makes ANGLE non-conformant."
            ]
        },
        {
            "name": "prefer_draw_clear_over_vkCmdClearAttachments",
            "category": "Workarounds",
            "description": [
                "On some hardware, clear using a draw call instead of vkCmdClearAttachments in the middle ",
                "of render pass due to bugs"
            ],
            "issue": "https://issuetracker.google.com/166809097"
        },
        {
            "name": "emulated_prerotation_90",
            "category": "Features",
            "description": [
                "Emulate 90-degree prerotation."
            ],
            "issue": "http://anglebug.com/4901"
        },
        {
            "name": "emulated_prerotation_180",
            "category": "Features",
            "description": [
                "Emulate 180-degree prerotation."
            ],
            "issue": "http://anglebug.com/4901"
        },
        {
            "name": "emulated_prerotation_270",
            "category": "Features",
            "description": [
                "Emulate 270-degree prerotation."
            ],
            "issue": "http://anglebug.com/4901"
        },
        {
            "name": "generate_SPIRV_through_glslang",
            "category": "Features",
            "description": [
                "Translate SPIR-V through glslang."
            ],
            "issue": "http://anglebug.com/4889"
        },
        {
            "name": "force_driver_uniform_over_spec_const",
            "category": "Workarounds",
            "description": [
                "Forces using driver uniforms instead of specialization constants."
            ],
            "issue": "http://issuetracker.google.com/173636783"
        },
        {
            "name": "expose_non_conformant_extensions_and_versions",
            "category": "Workarounds",
            "description": [
                "Expose GLES versions and extensions that are not conformant."
            ],
            "issue": "http://anglebug.com/5375"
        },
        {
            "name": "emulate_R32f_image_atomic_exchange",
            "category": "Workarounds",
            "description": [
                "Emulate r32f images with r32ui to support imageAtomicExchange."
            ],
            "issue": "http://anglebug.com/5535"
        },
        {
            "name": "supports_negative_viewport",
            "category": "Features",
            "description": [
                "The driver supports inverting the viewport with a negative height."
            ]
        },
        {
            "name": "force_fragment_shader_precision_highp_to_mediump",
            "category": "Workarounds",
            "description": [
                "Forces highp precision in fragment shader to mediump."
            ],
            "issue": "https://issuetracker.google.com/184850002"
        },
        {
            "name": "prefer_submit_at_FBO_boundary",
            "category": "Workarounds",
            "description": [
                "Submit commands to driver at each FBO boundary for performance improvements."
            ],
            "issue": "https://issuetracker.google.com/187425444"
        },
        {
            "name": "use_multiple_descriptors_for_external_formats",
            "category": "Workarounds",
            "description": [
                "Return a default descriptor count for external formats."
            ],
            "issue": "http://anglebug.com/6141"
        },
        {
            "name": "supports_protected_memory",
            "category": "Features",
            "description": [
                "VkDevice supports protected memory"
            ],
            "issue": "http://anglebug.com/3965"
        },
        {
            "name": "supports_host_query_reset",
            "category": "Features",
            "description": [
                "VkDevice supports VK_EXT_host_query_reset extension"
            ],
            "issue": "http://anglebug.com/6692"
        },
        {
            "name": "supports_surface_capabilities2_extension",
            "category": "Features",
            "description": [
                "VkInstance supports the VK_KHR_get_surface_capabilities2 extension"
            ]
        },
        {
            "name": "supports_surface_protected_capabilities_extension",
            "category": "Features",
            "description": [
                "VkInstance supports the VK_KHR_surface_protected_capabilities extension"
            ]
        },
        {
            "name": "supports_surfaceless_query_extension",
            "category": "Features",
            "description": [
                "VkInstance supports the VK_GOOGLE_surfaceless_query extension"
            ]
        },
        {
            "name": "supports_surface_protected_swapchains",
            "category": "Features",
            "description": [
                "VkSurface supportsProtected for protected swapchains"
            ]
        },
        {
            "name": "override_surface_format_RGB8_to_RGBA8",
            "category": "Workarounds",
            "description": [
                "Override surface format GL_RGB8 to GL_RGBA8"
            ],
            "issue": "http://anglebug.com/6651"
        },
        {
            "name": "supports_shared_presentable_image_extension",
            "category": "Features",
            "description": [
                "VkSurface supports the VK_KHR_shared_presentable_images extension"
            ]
        },
        {
            "name": "supports_shader_framebuffer_fetch",
            "category": "Features",
            "description": [
                "Whether the Vulkan backend supports coherent framebuffer fetch"
            ]
        },
        {
            "name": "supports_shader_framebuffer_fetch_non_coherent",
            "category": "Features",
            "description": [
                "Whether the Vulkan backend supports non-coherent framebuffer fetch"
            ]
        },
        {
            "name": "supports_lock_surface_extension",
            "category": "Features",
            "description": [
                "Surface supports the EGL_KHR_lock_surface3 extension"
            ]
        },
        {
            "name": "swapbuffers_on_flush_or_finish_with_single_buffer",
            "category": "Features",
            "description": [
                "Bypass deferredFlush with calling swapbuffers on flush or finish when in Shared Present ",
                "mode"
            ],
            "issue": "http://anglebug.com/6878"
        },
        {
            "name": "emulate_dithering",
            "category": "Features",
            "description": [
                "Emulate OpenGL dithering"
            ],
            "issue": "http://anglebug.com/6755"
        },
        {
            "name": "round_output_after_dithering",
            "category": "Workarounds",
            "description": [
                "Round output after dithering to workaround a driver bug that rounds the output up"
            ],
            "issue": "http://anglebug.com/6953"
        },
        {
            "name": "emulate_advanced_blend_equations",
            "category": "Features",
            "description": [
                "Emulate GL_KHR_blend_equation_advanced"
            ],
            "issue": "http://anglebug.com/3586"
        },
        {
            "name": "bottom_left_origin_present_region_rectangles",
            "category": "Workarounds",
            "description": [
                "On some platforms present region rectangles are expected to have a bottom-left origin, ",
                "instead of top-left origin as from spec"
            ]
        },
        {
            "name": "force_submit_immutable_texture_updates",
            "category": "AppWorkarounds",
            "description": [
                "Force submit updates to immutable textures"
            ],
            "issue": "http://anglebug.com/6929"
        },
        {
            "name": "retain_SPIRV_debug_info",
            "category": "Features",
            "description": [
                "Retain debug info in SPIR-V blob."
            ],
            "issue": "http://anglebug.com/5901"
        },
        {
            "name": "create_pipeline_during_link",
            "category": "Features",
            "description": [
                "Create pipeline with default state during glLinkProgram"
            ],
            "issue": "http://anglebug.com/7046"
        },
        {
            "name": "prefer_device_local_memory_host_visible",
            "category": "Features",
            "description": [
                "Prefer adding HOST_VISIBLE flag for DEVICE_LOCAL memory when picking memory types"
            ],
            "issue": "http://anglebug.com/7047"
        },
        {
            "name": "supports_extended_dynamic_state",
            "category": "Features",
            "description": [
                "VkDevice supports VK_EXT_extended_dynamic_state extension"
            ],
            "issue": "http://anglebug.com/5906"
        },
        {
            "name": "supports_extended_dynamic_state2",
            "category": "Features",
            "description": [
                "VkDevice supports VK_EXT_extended_dynamic_state2 extension"
            ],
            "issue": "http://anglebug.com/5906"
        },
        {
            "name": "supports_fragment_shading_rate",
            "category": "Features",
            "description": [
                "VkDevice supports VK_KHR_fragment_shading_rate extension"
            ],
            "issue": "http://anglebug.com/7172"
        },
        {
            "name": "explicitly_enable_per_sample_shading",
            "category": "Workarounds",
            "description": [
                "Explicitly enable per-sample shading if the fragment shader contains the ",
                "sample qualifier"
            ],
            "issue": "http://anglebug.com/6876"
        },
        {
            "name": "force_continuous_refresh_on_shared_present",
            "category": "Features",
            "description": [
                "Force to create vulkan swapchain with continuous refresh on shared present"
            ],
            "issue": "https://issuetracker.google.com/229267970"
        },
        {
            "name": "supports_image_2d_view_of_3d",
            "category": "Features",
            "description": [
                "VkDevice supports VK_EXT_image_2d_view_of_3d"
            ],
            "issue": "https://anglebug.com/7320"
        }
    ]
}