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 #ifndef INCLUDED_VCL_INC_WIN_SCOPED_GDI_HXX
  11 #define INCLUDED_VCL_INC_WIN_SCOPED_GDI_HXX
  12
  13 #include <win/svsys.h>
  14 #include <win/wincomp.hxx>
  15 #include <win/saldata.hxx>
  16
  17 #include <memory>
  18
  19 template <typename H, auto DeleterFunc> struct GDIDeleter
  20 {
  21     using pointer = H;
  22     void operator()(H h) { DeleterFunc(h); }
  23 };
  24
  25 template <typename H, auto DeleterFunc>
  26 using ScopedGDI = std::unique_ptr<H, GDIDeleter<H, DeleterFunc>>;
  27
  28 using ScopedHBRUSH = ScopedGDI<HBRUSH, DeleteBrush>;
  29 using ScopedHRGN = ScopedGDI<HRGN, DeleteRegion>;
  30 using ScopedHDC = ScopedGDI<HDC, DeleteDC>;
  31 using ScopedHPEN = ScopedGDI<HPEN, DeletePen>;
  32 using ScopedHFONT = ScopedGDI<HFONT, DeleteFont>;
  33 using ScopedHBITMAP = ScopedGDI<HBITMAP, DeleteBitmap>;
  34
  35 template <typename ScopedH, auto SelectorFunc> class ScopedSelectedGDI
  36 {
  37 public:
  38     ScopedSelectedGDI(HDC hDC, typename ScopedH::pointer h)
  39         : m_hDC(hDC)
  40         , m_hSelectedH(h)
  41         , m_hOrigH(SelectorFunc(hDC, h))
  42     {
  43     }
  44
  45     ~ScopedSelectedGDI() { SelectorFunc(m_hDC, m_hOrigH); }
  46
  47 private:
  48     HDC m_hDC;
  49     ScopedH m_hSelectedH;
  50     typename ScopedH::pointer m_hOrigH;
  51 };
  52
  53 using ScopedSelectedHPEN = ScopedSelectedGDI<ScopedHPEN, SelectPen>;
  54 using ScopedSelectedHFONT = ScopedSelectedGDI<ScopedHFONT, SelectFont>;
  55 using ScopedSelectedHBRUSH = ScopedSelectedGDI<ScopedHBRUSH, SelectBrush>;
  56
  57 template <sal_uLong ID> class ScopedCachedHDC
  58 {
  59 public:
  60     explicit ScopedCachedHDC(HBITMAP hBitmap)
  61         : m_hDC(ImplGetCachedDC(ID, hBitmap))
  62     {
  63     }
  64
  65     ~ScopedCachedHDC() { ImplReleaseCachedDC(ID); }
  66
  67     HDC get() const { return m_hDC; }
  68
  69 private:
  70     HDC m_hDC;
  71 };
  72
  73 #endif // INCLUDED_VCL_INC_WIN_SCOPED_GDI_HXX
  74
  75 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */