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8286581: Make Java process DPI Aware if sun.java2d.dpiaware property is set

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Reviewed-by: aivanov, prr
This commit is contained in:
Rajat Mahajan 2023-01-18 18:04:30 +00:00 committed by Alexey Ivanov
parent 3ea0b8bc25
commit 2a46e07f7d
1 changed files with 13 additions and 12 deletions

25
src/java.desktop/windows/native/libawt/windows/awt_Win32GraphicsEnv.cpp

@ -1,5 +1,5 @@
/*
* Copyright (c) 1999, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -31,6 +31,7 @@
#include "Devices.h"
#include "WindowsFlags.h"
#include "DllUtil.h"
#include <windef.h>
BOOL DWMIsCompositionEnabled();
@ -44,16 +45,14 @@ void initScreens(JNIEnv *env) {
/**
* This function attempts to make a Win32 API call to
* BOOL SetProcessDPIAware(VOID);
* which is only present on Windows Vista, and which instructs the
* Vista Windows Display Manager that this application is High DPI Aware
* and does not need to be scaled by the WDM and lied about the
* actual system dpi.
* BOOL SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT);
* to set Process DPI Awareness to DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2
* to match what we have in the manifest file.
*/
static void
SetProcessDPIAwareProperty()
{
typedef BOOL (WINAPI SetProcessDPIAwareFunc)(void);
typedef BOOL (WINAPI SetProcessDpiAwarenessContextFunc)(DPI_AWARENESS_CONTEXT);
static BOOL bAlreadySet = FALSE;
// setHighDPIAware is set in WindowsFlags.cpp
@ -66,12 +65,14 @@ SetProcessDPIAwareProperty()
HMODULE hLibUser32Dll = JDK_LoadSystemLibrary("user32.dll");
if (hLibUser32Dll != NULL) {
SetProcessDPIAwareFunc *lpSetProcessDPIAware =
(SetProcessDPIAwareFunc*)GetProcAddress(hLibUser32Dll,
"SetProcessDPIAware");
if (lpSetProcessDPIAware != NULL) {
lpSetProcessDPIAware();
SetProcessDpiAwarenessContextFunc *lpSetProcessDpiAwarenessContext =
(SetProcessDpiAwarenessContextFunc*)GetProcAddress(hLibUser32Dll,
"SetProcessDpiAwarenessContext");
if (lpSetProcessDpiAwarenessContext != NULL) {
lpSetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
}
::FreeLibrary(hLibUser32Dll);
}
}