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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include "gtkcairo.hxx"
#include <utility>
#include <vcl/sysdata.hxx>
#include <vcl/virdev.hxx>
#include <unx/gtk/gtkgdi.hxx>
namespace
{
Size get_surface_size(cairo_surface_t *surface)
{
cairo_t *cr = cairo_create(surface);
double x1, x2, y1, y2;
cairo_clip_extents(cr, &x1, &y1, &x2, &y2);
cairo_destroy(cr);
return Size(x2 - x1, y2 - y1);
}
}
namespace cairo
{
/**
* Surface::Surface: Create generic Canvas surface using given Cairo Surface
*
* @param pSurface Cairo Surface
*
* This constructor only stores data, it does no processing.
* It is used with e.g. cairo_image_surface_create_for_data()
*
* Set the mpSurface as pSurface
**/
Gtk3Surface::Gtk3Surface(CairoSurfaceSharedPtr pSurface)
: mpGraphics(nullptr)
, cr(nullptr)
, mpSurface(std::move(pSurface))
{}
/**
* Surface::Surface: Create Canvas surface from Window reference.
* @param x horizontal location of the new surface
* @param y vertical location of the new surface
* @param width width of the new surface
* @param height height of the new surface
*
* Set the mpSurface to the new surface or NULL
**/
Gtk3Surface::Gtk3Surface(const GtkSalGraphics* pGraphics, int x, int y, int width, int height)
: mpGraphics(pGraphics)
, cr(pGraphics->getCairoContext())
{
cairo_surface_t* surface = cairo_get_target(cr);
mpSurface.reset(
cairo_surface_create_for_rectangle(surface, x, y, width, height),
&cairo_surface_destroy);
}
Gtk3Surface::~Gtk3Surface()
{
if (cr)
cairo_destroy(cr);
}
/**
* Surface::getCairo: Create Cairo (drawing object) for the Canvas surface
*
* @return new Cairo or NULL
**/
CairoSharedPtr Gtk3Surface::getCairo() const
{
return CairoSharedPtr( cairo_create(mpSurface.get()),
&cairo_destroy );
}
/**
* Surface::getSimilar: Create new similar Canvas surface
* @param cairo_content_type format of the new surface (cairo_content_t from cairo/src/cairo.h)
* @param width width of the new surface
* @param height height of the new surface
*
* Creates a new Canvas surface. This normally creates platform native surface, even though
* generic function is used.
*
* Cairo surface from cairo_content_type (cairo_content_t)
*
* @return new surface or NULL
**/
SurfaceSharedPtr Gtk3Surface::getSimilar(int cairo_content_type, int width, int height ) const
{
return std::make_shared<Gtk3Surface>(
CairoSurfaceSharedPtr(
cairo_surface_create_similar( mpSurface.get(),
static_cast<cairo_content_t>(cairo_content_type), width, height ),
&cairo_surface_destroy ));
}
void Gtk3Surface::flush() const
{
cairo_surface_flush(mpSurface.get());
//Wonder if there is any benefit in using cairo_fill/stroke extents on
//every canvas call and only redrawing the union of those in a
//poor-mans-damage tracking
if (mpGraphics)
mpGraphics->WidgetQueueDraw();
}
VclPtr<VirtualDevice> Gtk3Surface::createVirtualDevice() const
{
SystemGraphicsData aSystemGraphicsData;
aSystemGraphicsData.nSize = sizeof(SystemGraphicsData);
aSystemGraphicsData.pSurface = mpSurface.get();
return VclPtr<VirtualDevice>::Create(aSystemGraphicsData,
get_surface_size(mpSurface.get()),
DeviceFormat::WITHOUT_ALPHA);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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