vcl/unx/gtk3/gdi/cairo_gtk3_cairo.cxx

   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 #include <utility>
  11
  12 #include "cairo_cairo.hxx"
  13 #include "cairo_gtk3_cairo.hxx"
  14
  15 #include <vcl/sysdata.hxx>
  16 #include <vcl/bitmap.hxx>
  17 #include <vcl/virdev.hxx>
  18 #include <vcl/window.hxx>
  19 #include <basegfx/vector/b2isize.hxx>
  20
  21 #include "unx/gtk/gtkgdi.hxx"
  22
  23 namespace cairo
  24 {
  25     /**
  26      * Surface::Surface:     Create generic Canvas surface using given Cairo Surface
  27      *
  28      * @param pSurface Cairo Surface
  29      *
  30      * This constructor only stores data, it does no processing.
  31      * It is used with e.g. cairo_image_surface_create_for_data()
  32      *
  33      * Set the mpSurface as pSurface
  34      **/
  35     Gtk3Surface::Gtk3Surface(const CairoSurfaceSharedPtr& pSurface)
  36         : mpGraphics(NULL)
  37         , cr(NULL)
  38         , mpSurface(pSurface)
  39     {}
  40
  41     /**
  42      * Surface::Surface:   Create Canvas surface from Window reference.
  43      * @param x horizontal location of the new surface
  44      * @param y vertical location of the new surface
  45      * @param width width of the new surface
  46      * @param height height of the new surface
  47      *
  48      * Set the mpSurface to the new surface or NULL
  49      **/
  50     Gtk3Surface::Gtk3Surface(const GtkSalGraphics* pGraphics, int x, int y, int width, int height)
  51         : mpGraphics(pGraphics)
  52         , cr(pGraphics->getCairoContext())
  53     {
  54         cairo_surface_t* surface = cairo_get_target(cr);
  55         mpSurface.reset(
  56             cairo_surface_create_for_rectangle(surface, x, y, width, height),
  57             &cairo_surface_destroy);
  58     }
  59
  60     Gtk3Surface::~Gtk3Surface()
  61     {
  62         if (cr)
  63             cairo_destroy(cr);
  64     }
  65
  66     /**
  67      * Surface::getCairo:  Create Cairo (drawing object) for the Canvas surface
  68      *
  69      * @return new Cairo or NULL
  70      **/
  71     CairoSharedPtr Gtk3Surface::getCairo() const
  72     {
  73         return CairoSharedPtr( cairo_create(mpSurface.get()),
  74                                &cairo_destroy );
  75     }
  76
  77     /**
  78      * Surface::getSimilar:  Create new similar Canvas surface
  79      * @param cairo_content_type format of the new surface (cairo_content_t from cairo/src/cairo.h)
  80      * @param width width of the new surface
  81      * @param height height of the new surface
  82      *
  83      * Creates a new Canvas surface. This normally creates platform native surface, even though
  84      * generic function is used.
  85      *
  86      * Cairo surface from cairo_content_type (cairo_content_t)
  87      *
  88      * @return new surface or NULL
  89      **/
  90     SurfaceSharedPtr Gtk3Surface::getSimilar(int cairo_content_type, int width, int height ) const
  91     {
  92         return SurfaceSharedPtr(
  93             new Gtk3Surface(
  94                             CairoSurfaceSharedPtr(
  95                                 cairo_surface_create_similar( mpSurface.get(),
  96                                     static_cast<cairo_content_t>(cairo_content_type), width, height ),
  97                                 &cairo_surface_destroy )));
  98     }
  99
 100     void Gtk3Surface::flush() const
 101     {
 102         cairo_surface_flush(mpSurface.get());
 103         //Wonder if there is any benefit in using cairo_fill/stroke extents on
 104         //every canvas call and only redrawing the union of those in a
 105         //poor-mans-damage tracking
 106         if (mpGraphics)
 107             mpGraphics->WidgetQueueDraw();
 108     }
 109
 110     VclPtr<VirtualDevice> Gtk3Surface::createVirtualDevice() const
 111     {
 112         return VclPtrInstance<VirtualDevice>(nullptr, Size(1, 1), 0);
 113     }
 114
 115 }
 116
 117 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */