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https://git.vladimir.cc/vladimir/ewsdr.git
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105 lines
2.8 KiB
ObjectPascal
105 lines
2.8 KiB
ObjectPascal
{
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Copyright (C)
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2026 - Uladzimir Karpenka, EW8BAK
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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}
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unit WindowsDPI;
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{$IFDEF FPC}
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{$MODE Delphi}
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{$ENDIF}
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interface
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procedure EnableProcessDpiAwareness;
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implementation
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{$IFDEF MSWINDOWS}
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uses
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Windows;
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type
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TDpiAwarenessContext = THandle;
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TSetProcessDpiAwarenessContext = function(Value: TDpiAwarenessContext): BOOL; stdcall;
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TSetProcessDpiAwareness = function(Value: Integer): HRESULT; stdcall;
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TSetProcessDPIAware = function: BOOL; stdcall;
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const
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DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 = TDpiAwarenessContext(PtrInt(-4));
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DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE = TDpiAwarenessContext(PtrInt(-3));
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PROCESS_PER_MONITOR_DPI_AWARE = 2;
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function TrySetDpiAwarenessContext(Value: TDpiAwarenessContext): Boolean;
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var
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User32: HMODULE;
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Proc: TSetProcessDpiAwarenessContext;
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begin
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Result := False;
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User32 := GetModuleHandle('user32.dll');
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if User32 = 0 then Exit;
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Proc := TSetProcessDpiAwarenessContext(GetProcAddress(User32, 'SetProcessDpiAwarenessContext'));
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if Assigned(Proc) then
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Result := Proc(Value);
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end;
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function TrySetDpiAwarenessShcore: Boolean;
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var
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Shcore: HMODULE;
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Proc: TSetProcessDpiAwareness;
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begin
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Result := False;
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Shcore := LoadLibrary('shcore.dll');
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if Shcore = 0 then Exit;
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try
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Proc := TSetProcessDpiAwareness(GetProcAddress(Shcore, 'SetProcessDpiAwareness'));
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if Assigned(Proc) then
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Result := Proc(PROCESS_PER_MONITOR_DPI_AWARE) >= 0;
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finally
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FreeLibrary(Shcore);
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end;
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end;
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function TrySetSystemDpiAware: Boolean;
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var
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User32: HMODULE;
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Proc: TSetProcessDPIAware;
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begin
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Result := False;
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User32 := GetModuleHandle('user32.dll');
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if User32 = 0 then Exit;
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Proc := TSetProcessDPIAware(GetProcAddress(User32, 'SetProcessDPIAware'));
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if Assigned(Proc) then
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Result := Proc();
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end;
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procedure EnableProcessDpiAwareness;
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begin
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if TrySetDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2) then Exit;
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if TrySetDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE) then Exit;
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if TrySetDpiAwarenessShcore then Exit;
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TrySetSystemDpiAware;
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end;
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{$ELSE}
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procedure EnableProcessDpiAwareness;
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begin
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end;
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{$ENDIF}
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end.
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