mirror of
https://github.com/mozilla/gecko-dev.git
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68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/WindowsDpiInitialization.h"
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#include "mozilla/DynamicallyLinkedFunctionPtr.h"
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#include "mozilla/WindowsProcessMitigations.h"
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#include "mozilla/WindowsVersion.h"
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#include <shellscalingapi.h>
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#include <windows.h>
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namespace mozilla {
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typedef HRESULT(WINAPI* SetProcessDpiAwarenessType)(PROCESS_DPI_AWARENESS);
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typedef BOOL(WINAPI* SetProcessDpiAwarenessContextType)(DPI_AWARENESS_CONTEXT);
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WindowsDpiInitializationResult WindowsDpiInitialization() {
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// DPI Awareness can't be used in a Win32k Lockdown process, so there's
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// nothing to do
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if (IsWin32kLockedDown()) {
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return WindowsDpiInitializationResult::Success;
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}
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// From MSDN:
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// SetProcessDpiAwarenessContext() was added in the Win10 Anniversary Update
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// SetProcessDpiAwareness() was added in Windows 8.1
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// SetProcessDpiAware() was added in Windows Vista
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//
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// DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 wasn't added later until
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// the Creators Update, so if it fails we just fall back to
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// DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE
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if (IsWin10AnniversaryUpdateOrLater()) {
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DynamicallyLinkedFunctionPtr<SetProcessDpiAwarenessContextType>
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setProcessDpiAwarenessContext(L"user32.dll",
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"SetProcessDpiAwarenessContext");
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if (!setProcessDpiAwarenessContext) {
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return WindowsDpiInitializationResult::
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FindSetProcessDpiAwarenessContextFailed;
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}
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if (!setProcessDpiAwarenessContext(
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DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2) &&
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!setProcessDpiAwarenessContext(
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DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE)) {
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return WindowsDpiInitializationResult::
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SetProcessDpiAwarenessContextFailed;
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}
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return WindowsDpiInitializationResult::Success;
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} else {
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DynamicallyLinkedFunctionPtr<SetProcessDpiAwarenessType>
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setProcessDpiAwareness(L"Shcore.dll", "SetProcessDpiAwareness");
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if (!setProcessDpiAwareness) {
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return WindowsDpiInitializationResult::FindSetProcessDpiAwarenessFailed;
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}
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if (FAILED(setProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE))) {
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return WindowsDpiInitializationResult::SetProcessDpiAwarenessFailed;
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}
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return WindowsDpiInitializationResult::Success;
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}
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}
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} // namespace mozilla
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