summaryrefslogtreecommitdiffstats
path: root/mozglue/misc/WindowsDpiInitialization.cpp
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /mozglue/misc/WindowsDpiInitialization.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'mozglue/misc/WindowsDpiInitialization.cpp')
-rw-r--r--mozglue/misc/WindowsDpiInitialization.cpp67
1 files changed, 67 insertions, 0 deletions
diff --git a/mozglue/misc/WindowsDpiInitialization.cpp b/mozglue/misc/WindowsDpiInitialization.cpp
new file mode 100644
index 0000000000..972d577651
--- /dev/null
+++ b/mozglue/misc/WindowsDpiInitialization.cpp
@@ -0,0 +1,67 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/WindowsDpiInitialization.h"
+
+#include "mozilla/DynamicallyLinkedFunctionPtr.h"
+#include "mozilla/WindowsProcessMitigations.h"
+#include "mozilla/WindowsVersion.h"
+
+#include <shellscalingapi.h>
+#include <windows.h>
+
+namespace mozilla {
+
+typedef HRESULT(WINAPI* SetProcessDpiAwarenessType)(PROCESS_DPI_AWARENESS);
+typedef BOOL(WINAPI* SetProcessDpiAwarenessContextType)(DPI_AWARENESS_CONTEXT);
+
+WindowsDpiInitializationResult WindowsDpiInitialization() {
+ // DPI Awareness can't be used in a Win32k Lockdown process, so there's
+ // nothing to do
+ if (IsWin32kLockedDown()) {
+ return WindowsDpiInitializationResult::Success;
+ }
+
+ // From MSDN:
+ // SetProcessDpiAwarenessContext() was added in the Win10 Anniversary Update
+ // SetProcessDpiAwareness() was added in Windows 8.1
+ // SetProcessDpiAware() was added in Windows Vista
+ //
+ // DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 wasn't added later until
+ // the Creators Update, so if it fails we just fall back to
+ // DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE
+ if (IsWin10AnniversaryUpdateOrLater()) {
+ DynamicallyLinkedFunctionPtr<SetProcessDpiAwarenessContextType>
+ setProcessDpiAwarenessContext(L"user32.dll",
+ "SetProcessDpiAwarenessContext");
+ if (!setProcessDpiAwarenessContext) {
+ return WindowsDpiInitializationResult::
+ FindSetProcessDpiAwarenessContextFailed;
+ }
+
+ if (!setProcessDpiAwarenessContext(
+ DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2) &&
+ !setProcessDpiAwarenessContext(
+ DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE)) {
+ return WindowsDpiInitializationResult::
+ SetProcessDpiAwarenessContextFailed;
+ }
+
+ return WindowsDpiInitializationResult::Success;
+ } else {
+ DynamicallyLinkedFunctionPtr<SetProcessDpiAwarenessType>
+ setProcessDpiAwareness(L"Shcore.dll", "SetProcessDpiAwareness");
+ if (!setProcessDpiAwareness) {
+ return WindowsDpiInitializationResult::FindSetProcessDpiAwarenessFailed;
+ }
+
+ if (FAILED(setProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE))) {
+ return WindowsDpiInitializationResult::SetProcessDpiAwarenessFailed;
+ }
+
+ return WindowsDpiInitializationResult::Success;
+ }
+}
+
+} // namespace mozilla