Add DAWN_USE_WINDOWS_UI option for Zig & MinGW compilers

In Mach engine, we're compiling Dawn using Zig as a C/C++ compiler. Zig provides it's own libc implementation, build system, and system headers. Dawn today makes use of newer `windows.ui.*.h` headers introduced in more recent Windows versions. However, Zig relies on MinGW for it's system headers and it is not straightforward/desirable to use the official Windows SDK headers: Zig does not have these headers today. Since Dawn does not truly require these headers, we are using a preprocessor directive `DAWN_USE_WINDOWS_UI` to disable this functionality and enable compilation of Dawn with Zig/MinGW compilers. I have based the implementation on the existing `DAWN_USE_X11` and `DAWN_USE_WAYLAND` build configuration approaches. Signed-off-by: Stephen Gutekanst <stephen@hexops.com> Change-Id: If41cafb95666946115b58567fef753df3fbe940a
hexops-graveyard · Aug 7, 2022 · 5711e19 · 5711e19
1 parent e06266e
commit 5711e19
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Showing 6 changed files with 27 additions and 12 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -84,8 +84,10 @@ set(ENABLE_DESKTOP_GL OFF)
 set(ENABLE_VULKAN OFF)
 set(USE_WAYLAND OFF)
 set(USE_X11 OFF)
+set(USE_WINDOWS_UI OFF)
 set(BUILD_SAMPLES OFF)
 if (WIN32)
+    set(USE_WINDOWS_UI ON)
     set(ENABLE_D3D12 ON)
     if (NOT WINDOWS_STORE)
         # Enable Vulkan in win32 compilation only
@@ -128,6 +130,7 @@ option_if_not_defined(DAWN_ENABLE_VULKAN "Enable compilation of the Vulkan backe
 option_if_not_defined(DAWN_ALWAYS_ASSERT "Enable assertions on all build types" OFF)
 option_if_not_defined(DAWN_USE_WAYLAND "Enable support for Wayland surface" ${USE_WAYLAND})
 option_if_not_defined(DAWN_USE_X11 "Enable support for X11 surface" ${USE_X11})
+option_if_not_defined(DAWN_USE_WINDOWS_UI "Enable support for Windows UI surface" ${USE_WINDOWS_UI})
 
 option_if_not_defined(DAWN_BUILD_SAMPLES "Enables building Dawn's samples" ${BUILD_SAMPLES})
 option_if_not_defined(DAWN_BUILD_NODE_BINDINGS "Enables building Dawn's NodeJS bindings" OFF)
@@ -264,6 +267,7 @@ message(STATUS "Dawn build Null backend: ${DAWN_ENABLE_NULL}")
 message(STATUS "Dawn build with asserts in all configurations: ${DAWN_ALWAYS_ASSERT}")
 message(STATUS "Dawn build Wayland support: ${DAWN_USE_WAYLAND}")
 message(STATUS "Dawn build X11 support: ${DAWN_USE_X11}")
+message(STATUS "Dawn build Windows UI support: ${DAWN_USE_WINDOWS_UI}")
 
 message(STATUS "Dawn build samples: ${DAWN_BUILD_SAMPLES}")
 message(STATUS "Dawn build Node bindings: ${DAWN_BUILD_NODE_BINDINGS}")
@@ -377,6 +381,9 @@ endif()
 if (DAWN_USE_X11)
     target_compile_definitions(dawn_internal_config INTERFACE "DAWN_USE_X11")
 endif()
+if (DAWN_USE_WINDOWS_UI)
+    target_compile_definitions(dawn_internal_config INTERFACE "DAWN_USE_WINDOWS_UI")
+endif()
 if (WIN32)
     target_compile_definitions(dawn_internal_config INTERFACE "NOMINMAX" "WIN32_LEAN_AND_MEAN")
 endif()

diff --git a/scripts/dawn_features.gni b/scripts/dawn_features.gni
@@ -30,6 +30,7 @@ if (build_with_chromium) {
 
 # Enable the compilation for UWP
 dawn_is_winuwp = is_win && target_os == "winuwp"
+dawn_use_windows_ui = is_win
 
 declare_args() {
   dawn_use_angle = true

diff --git a/src/dawn/common/BUILD.gn b/src/dawn/common/BUILD.gn
@@ -86,6 +86,9 @@ config("internal_config") {
   if (dawn_use_x11) {
     defines += [ "DAWN_USE_X11" ]
   }
+  if (dawn_use_windows_ui) {
+    defines += [ "DAWN_USE_WINDOWS_UI" ]
+  }
 
   if (dawn_enable_error_injection) {
     defines += [ "DAWN_ENABLE_ERROR_INJECTION" ]

diff --git a/src/dawn/native/Surface.cpp b/src/dawn/native/Surface.cpp
@@ -19,10 +19,10 @@
 #include "dawn/native/Instance.h"
 #include "dawn/native/SwapChain.h"
 
-#if DAWN_PLATFORM_IS(WINDOWS)
+#if defined(DAWN_USE_WINDOWS_UI)
 #include <windows.ui.core.h>
 #include <windows.ui.xaml.controls.h>
-#endif  // DAWN_PLATFORM_IS(WINDOWS)
+#endif  // defined(DAWN_USE_WINDOWS_UI)
 
 #if defined(DAWN_USE_X11)
 #include "dawn/common/xlib_with_undefs.h"
@@ -98,7 +98,6 @@ MaybeError ValidateSurfaceDescriptor(const InstanceBase* instance,
     }
 #endif  // DAWN_PLATFORM_IS(ANDROID)
 
-#if DAWN_PLATFORM_IS(WINDOWS)
 #if DAWN_PLATFORM_IS(WIN32)
     const SurfaceDescriptorFromWindowsHWND* hwndDesc = nullptr;
     FindInChain(descriptor->nextInChain, &hwndDesc);
@@ -107,6 +106,7 @@ MaybeError ValidateSurfaceDescriptor(const InstanceBase* instance,
         return {};
     }
 #endif  // DAWN_PLATFORM_IS(WIN32)
+#if defined(DAWN_USE_WINDOWS_UI)
     const SurfaceDescriptorFromWindowsCoreWindow* coreWindowDesc = nullptr;
     FindInChain(descriptor->nextInChain, &coreWindowDesc);
     if (coreWindowDesc) {
@@ -129,7 +129,7 @@ MaybeError ValidateSurfaceDescriptor(const InstanceBase* instance,
                         "Invalid SwapChainPanel");
         return {};
     }
-#endif  // DAWN_PLATFORM_IS(WINDOWS)
+#endif  // defined(DAWN_USE_WINDOWS_UI)
 
 #if defined(DAWN_USE_WAYLAND)
     const SurfaceDescriptorFromWaylandSurface* waylandDesc = nullptr;
@@ -203,15 +203,15 @@ Surface::Surface(InstanceBase* instance, const SurfaceDescriptor* descriptor)
         mHInstance = hwndDesc->hinstance;
         mHWND = hwndDesc->hwnd;
     } else if (coreWindowDesc) {
-#if DAWN_PLATFORM_IS(WINDOWS)
+#if defined(DAWN_USE_WINDOWS_UI)
         mType = Type::WindowsCoreWindow;
         mCoreWindow = static_cast<IUnknown*>(coreWindowDesc->coreWindow);
-#endif  // DAWN_PLATFORM_IS(WINDOWS)
+#endif  // defined(DAWN_USE_WINDOWS_UI)
     } else if (swapChainPanelDesc) {
-#if DAWN_PLATFORM_IS(WINDOWS)
+#if defined(DAWN_USE_WINDOWS_UI)
         mType = Type::WindowsSwapChainPanel;
         mSwapChainPanel = static_cast<IUnknown*>(swapChainPanelDesc->swapChainPanel);
-#endif  // DAWN_PLATFORM_IS(WINDOWS)
+#endif  // defined(DAWN_USE_WINDOWS_UI)
     } else if (xDesc) {
         mType = Type::XlibWindow;
         mXDisplay = xDesc->display;
@@ -283,7 +283,7 @@ void* Surface::GetHWND() const {
 IUnknown* Surface::GetCoreWindow() const {
     ASSERT(!IsError());
     ASSERT(mType == Type::WindowsCoreWindow);
-#if DAWN_PLATFORM_IS(WINDOWS)
+#if defined(DAWN_USE_WINDOWS_UI)
     return mCoreWindow.Get();
 #else
     return nullptr;
@@ -293,7 +293,7 @@ IUnknown* Surface::GetCoreWindow() const {
 IUnknown* Surface::GetSwapChainPanel() const {
     ASSERT(!IsError());
     ASSERT(mType == Type::WindowsSwapChainPanel);
-#if DAWN_PLATFORM_IS(WINDOWS)
+#if defined(DAWN_USE_WINDOWS_UI)
     return mSwapChainPanel.Get();
 #else
     return nullptr;

diff --git a/src/dawn/native/Surface.h b/src/dawn/native/Surface.h
@@ -112,13 +112,13 @@ class Surface final : public ErrorMonad {
     void* mHInstance = nullptr;
     void* mHWND = nullptr;
 
-#if DAWN_PLATFORM_IS(WINDOWS)
+#if defined(DAWN_USE_WINDOWS_UI)
     // WindowsCoreWindow
     ComPtr<IUnknown> mCoreWindow;
 
     // WindowsSwapChainPanel
     ComPtr<IUnknown> mSwapChainPanel;
-#endif  // DAWN_PLATFORM_IS(WINDOWS)
+#endif  // defined(DAWN_USE_WINDOWS_UI)
 
     // Xlib
     void* mXDisplay = nullptr;

diff --git a/src/dawn/native/d3d12/SwapChainD3D12.cpp b/src/dawn/native/d3d12/SwapChainD3D12.cpp
@@ -14,7 +14,9 @@
 
 #include "dawn/native/d3d12/SwapChainD3D12.h"
 
+#if defined(DAWN_USE_WINDOWS_UI)
 #include <windows.ui.xaml.media.dxinterop.h>
+#endif  // defined(DAWN_USE_WINDOWS_UI)
 
 #include <utility>
 
@@ -257,6 +259,7 @@ MaybeError SwapChain::InitializeSwapChainFromScratch() {
                 "Creating the IDXGISwapChain1"));
             break;
         }
+#if defined(DAWN_USE_WINDOWS_UI)
         case Surface::Type::WindowsCoreWindow: {
             DAWN_TRY(CheckHRESULT(
                 factory2->CreateSwapChainForCoreWindow(device->GetCommandQueue().Get(),
@@ -278,6 +281,7 @@ MaybeError SwapChain::InitializeSwapChainFromScratch() {
                                   "Setting SwapChain"));
             break;
         }
+#endif // defined(DAWN_USE_WINDOWS_UI)
         default:
             UNREACHABLE();
     }