| # Copyright 2018 The Dawn Authors |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import("//build_overrides/build.gni") |
| |
| if (build_with_chromium) { |
| import("//build/config/sanitizers/sanitizers.gni") |
| import("//build/config/ui.gni") |
| |
| dawn_use_x11 = use_x11 |
| } else { |
| declare_args() { |
| # Whether Dawn should enable X11 support. |
| dawn_use_x11 = is_linux && !is_chromeos |
| } |
| } |
| |
| # Enable the compilation for UWP |
| dawn_is_winuwp = is_win && target_os == "winuwp" |
| |
| declare_args() { |
| dawn_use_angle = true |
| |
| # Enables usage of swiftshader on the Vulkan backend. |
| # Note that this will only work in standalone and in projects that set the |
| # dawn_swiftshader_dir variable in build_overrides/dawn.gni |
| # Because of how the Vulkan loader works, setting this makes Dawn only able |
| # to find the Swiftshader ICD and not the others. |
| # Enabled by default when fuzzing. |
| dawn_use_swiftshader = build_with_chromium && use_fuzzing_engine |
| } |
| |
| declare_args() { |
| # Enable Dawn's ASSERTs even in release builds |
| dawn_always_assert = false |
| |
| # Should the Dawn static libraries be fully linked vs. GN's default of |
| # treating them as source sets. This is useful for people using Dawn |
| # standalone to produce static libraries to use in their projects. |
| dawn_complete_static_libs = false |
| |
| # Enables the compilation of Dawn's D3D12 backend |
| dawn_enable_d3d12 = is_win |
| |
| # Enables the compilation of Dawn's Metal backend |
| dawn_enable_metal = is_mac |
| |
| # Enables the compilation of Dawn's Null backend |
| # (required for unittests, obviously non-conformant) |
| dawn_enable_null = true |
| |
| # Enables the compilation of Dawn's OpenGL backend |
| # (best effort, non-conformant) |
| dawn_enable_desktop_gl = is_linux && !is_chromeos |
| |
| # Enables the compilation of Dawn's OpenGLES backend |
| # (WebGPU/Compat subset) |
| dawn_enable_opengles = (is_linux && !is_chromeos) || is_win |
| |
| # Enables the compilation of Dawn's Vulkan backend |
| # Disables vulkan when compiling for UWP, since UWP only supports d3d |
| dawn_enable_vulkan = is_linux || is_chromeos || (is_win && !dawn_is_winuwp) || |
| is_fuchsia || is_android || dawn_use_swiftshader |
| |
| # Enable use of reflection compiler in spirv-cross. This is needed |
| # if performing reflection on systems that the platform language |
| # shader is SPIR-V, since there isn't an instance of the |
| # GLSL/HLSL/MSL compiler. This implicitly pulls in the GLSL |
| # compiler, since it is a sub-class of it. |
| dawn_enable_cross_reflection = false |
| |
| # Enables error injection for faking failures to native API calls |
| dawn_enable_error_injection = |
| is_debug || (build_with_chromium && use_fuzzing_engine) |
| } |
| |
| # GN does not allow reading a variable defined in the same declare_args(). |
| # Put them in two separate declare_args() when setting the value of one |
| # argument based on another. |
| declare_args() { |
| # Uses our built version of the Vulkan validation layers |
| dawn_enable_vulkan_validation_layers = |
| dawn_enable_vulkan && ((is_linux && !is_chromeos) || is_win || is_mac) |
| |
| # Uses our built version of the Vulkan loader on platforms where we can't |
| # assume to have one present at the system level. |
| dawn_enable_vulkan_loader = dawn_enable_vulkan && is_mac |
| } |
| |
| # UWP only supports CoreWindow for windowing |
| dawn_supports_glfw_for_windowing = |
| (is_win && !dawn_is_winuwp) || (is_linux && !is_chromeos) || is_mac |
| |
| # Much of the backend code is shared, so define a convenience var. |
| dawn_enable_opengl = dawn_enable_opengles || dawn_enable_desktop_gl |