vcl/inc/win/scoped_gdi.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #pragma once
  11
  12 #include <win/svsys.h>
  13 #include <win/wincomp.hxx>
  14 #include <win/saldata.hxx>
  15
  16 #include <memory>
  17
  18 template <typename H, auto DeleterFunc> struct GDIDeleter
  19 {
  20     using pointer = H;
  21     void operator()(H h) { DeleterFunc(h); }
  22 };
  23
  24 template <typename H, auto DeleterFunc>
  25 using ScopedGDI = std::unique_ptr<H, GDIDeleter<H, DeleterFunc>>;
  26
  27 using ScopedHBRUSH = ScopedGDI<HBRUSH, DeleteBrush>;
  28 using ScopedHRGN = ScopedGDI<HRGN, DeleteRegion>;
  29 using ScopedHDC = ScopedGDI<HDC, DeleteDC>;
  30 using ScopedHPEN = ScopedGDI<HPEN, DeletePen>;
  31 using ScopedHFONT = ScopedGDI<HFONT, DeleteFont>;
  32 using ScopedHBITMAP = ScopedGDI<HBITMAP, DeleteBitmap>;
  33
  34 template <typename ScopedH, auto SelectorFunc> class ScopedSelectedGDI
  35 {
  36 public:
  37     ScopedSelectedGDI(HDC hDC, typename ScopedH::pointer h)
  38         : m_hDC(hDC)
  39         , m_hSelectedH(h)
  40         , m_hOrigH(SelectorFunc(hDC, h))
  41     {
  42     }
  43
  44     ~ScopedSelectedGDI() { SelectorFunc(m_hDC, m_hOrigH); }
  45
  46 private:
  47     HDC m_hDC;
  48     ScopedH m_hSelectedH;
  49     typename ScopedH::pointer m_hOrigH;
  50 };
  51
  52 using ScopedSelectedHPEN = ScopedSelectedGDI<ScopedHPEN, SelectPen>;
  53 using ScopedSelectedHFONT = ScopedSelectedGDI<ScopedHFONT, SelectFont>;
  54 using ScopedSelectedHBRUSH = ScopedSelectedGDI<ScopedHBRUSH, SelectBrush>;
  55
  56 template <sal_uLong ID> class ScopedCachedHDC
  57 {
  58 public:
  59     explicit ScopedCachedHDC(HBITMAP hBitmap)
  60         : m_hDC(ImplGetCachedDC(ID, hBitmap))
  61     {
  62     }
  63
  64     ~ScopedCachedHDC() { ImplReleaseCachedDC(ID); }
  65
  66     HDC get() const { return m_hDC; }
  67
  68 private:
  69     HDC m_hDC;
  70 };
  71
  72 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */