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