vcl/inc/quartz/CGHelpers.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   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
  11 #ifndef INCLUDED_VCL_INC_QUARTZ_CGHELPER_HXX
  12 #define INCLUDED_VCL_INC_QUARTZ_CGHELPER_HXX
  13
  14 #include <premac.h>
  15 #include <CoreGraphics/CoreGraphics.h>
  16 #include <postmac.h>
  17
  18 #include <quartz/utils.h>
  19
  20 class CGLayerHolder
  21 {
  22 private:
  23     CGLayerRef mpLayer;
  24
  25     // Layer's scaling factor
  26     float mfScale;
  27
  28 public:
  29     CGLayerHolder()
  30         : mpLayer(nullptr)
  31         , mfScale(1.0)
  32     {
  33     }
  34
  35     CGLayerHolder(CGLayerRef pLayer, float fScale = 1.0)
  36         : mpLayer(pLayer)
  37         , mfScale(fScale)
  38     {
  39     }
  40
  41     // Just the size of the layer in pixels
  42     CGSize getSizePixels() const
  43     {
  44         CGSize aSize;
  45         if (mpLayer)
  46         {
  47             aSize = CGLayerGetSize(mpLayer);
  48         }
  49         return aSize;
  50     }
  51
  52     // Size in points is size in pixels divided by the scaling factor
  53     CGSize getSizePoints() const
  54     {
  55         CGSize aSize;
  56         if (mpLayer)
  57         {
  58             const CGSize aLayerSize = getSizePixels();
  59             aSize.width = aLayerSize.width / mfScale;
  60             aSize.height = aLayerSize.height / mfScale;
  61         }
  62         return aSize;
  63     }
  64
  65     CGLayerRef get() const { return mpLayer; }
  66
  67     bool isSet() const { return mpLayer != nullptr; }
  68
  69     void set(CGLayerRef const& pLayer) { mpLayer = pLayer; }
  70
  71     float getScale() const { return mfScale; }
  72
  73     void setScale(float fScale) { mfScale = fScale; }
  74 };
  75
  76 class CGContextHolder
  77 {
  78 private:
  79     CGContextRef mpContext;
  80
  81 public:
  82     CGContextHolder()
  83         : mpContext(nullptr)
  84     {
  85     }
  86
  87     CGContextHolder(CGContextRef pContext)
  88         : mpContext(pContext)
  89     {
  90     }
  91
  92     CGContextRef get() const { return mpContext; }
  93
  94     bool isSet() const { return mpContext != nullptr; }
  95
  96     void set(CGContextRef const& pContext) { mpContext = pContext; }
  97
  98     void saveState() { CGContextSaveGState(mpContext); }
  99
 100     void restoreState() { CGContextRestoreGState(mpContext); }
 101 };
 102
 103 #endif // INCLUDED_VCL_INC_QUARTZ_CGHELPER_HXX
 104
 105 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */