81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* screenshot-win32-dwm-api.h
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* Copyright (C) 2018 Gil Eliyahu <gileli121@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <https://www.gnu.org/licenses/>.
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*/
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void UnloadRequiredDwmFunctions (void);
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BOOL LoadRequiredDwmFunctions (void);
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typedef HRESULT (WINAPI* DWMGETWINDOWATTRIBUTE)(HWND, DWORD, _Out_ PVOID, DWORD);
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DWMGETWINDOWATTRIBUTE DwmGetWindowAttribute;
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typedef enum _DWMWINDOWATTRIBUTE {
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DWMWA_NCRENDERING_ENABLED = 1,
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DWMWA_NCRENDERING_POLICY,
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DWMWA_TRANSITIONS_FORCEDISABLED,
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DWMWA_ALLOW_NCPAINT,
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DWMWA_CAPTION_BUTTON_BOUNDS,
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DWMWA_NONCLIENT_RTL_LAYOUT,
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DWMWA_FORCE_ICONIC_REPRESENTATION,
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DWMWA_FLIP3D_POLICY,
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DWMWA_EXTENDED_FRAME_BOUNDS,
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DWMWA_HAS_ICONIC_BITMAP,
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DWMWA_DISALLOW_PEEK,
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DWMWA_EXCLUDED_FROM_PEEK,
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DWMWA_CLOAK,
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DWMWA_CLOAKED,
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DWMWA_FREEZE_REPRESENTATION,
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DWMWA_LAST
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} DWMWINDOWATTRIBUTE;
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typedef HRESULT (WINAPI* DWMISCOMPOSITIONENABLED) (BOOL *pfEnabled);
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DWMISCOMPOSITIONENABLED DwmIsCompositionEnabled;
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static HMODULE dwmApi = NULL;
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void
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UnloadRequiredDwmFunctions (void)
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{
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if (! dwmApi) return;
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FreeLibrary(dwmApi);
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dwmApi = NULL;
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}
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BOOL
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LoadRequiredDwmFunctions (void)
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{
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if (dwmApi) return TRUE;
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dwmApi = LoadLibraryW (L"dwmapi");
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if (! dwmApi) return FALSE;
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DwmGetWindowAttribute = (DWMGETWINDOWATTRIBUTE) GetProcAddress (dwmApi, "DwmGetWindowAttribute");
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DwmIsCompositionEnabled = (DWMISCOMPOSITIONENABLED) GetProcAddress (dwmApi, "DwmIsCompositionEnabled");
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if (! (DwmGetWindowAttribute && DwmIsCompositionEnabled))
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{
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UnloadRequiredDwmFunctions ();
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return FALSE;
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}
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return TRUE;
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}
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