cairo_devicehelper.hxx 5.28 KB
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
 * 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/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
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#ifndef INCLUDED_CANVAS_SOURCE_CAIRO_CAIRO_DEVICEHELPER_HXX
#define INCLUDED_CANVAS_SOURCE_CAIRO_CAIRO_DEVICEHELPER_HXX
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#include <com/sun/star/awt/Rectangle.hpp>
#include <com/sun/star/rendering/XGraphicDevice.hpp>
#include <com/sun/star/rendering/XBufferController.hpp>

#include <vcl/window.hxx>
#include <vcl/bitmap.hxx>

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#include "cairo_surfaceprovider.hxx"
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/* Definition of DeviceHelper class */

namespace cairocanvas
{
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    class DeviceHelper
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    {
    public:
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        /// make noncopyable
        DeviceHelper(const DeviceHelper&) = delete;
        const DeviceHelper& operator=(const DeviceHelper&) = delete;

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        DeviceHelper();

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        /** init helper

            @param rCanvas
            Owning canvas.

            @param rRefDevice
            Reference output device. Needed for resolution
            calculations etc.
         */
        void init( SurfaceProvider& rSurfaceProvider,
                   OutputDevice&    rRefDevice );
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        /// Dispose all internal references
        void disposing();

        // XWindowGraphicDevice
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        css::geometry::RealSize2D getPhysicalResolution();
        css::geometry::RealSize2D getPhysicalSize();
        css::uno::Reference< css::rendering::XLinePolyPolygon2D > createCompatibleLinePolyPolygon(
            const css::uno::Reference< css::rendering::XGraphicDevice >&                               rDevice,
            const css::uno::Sequence< css::uno::Sequence< css::geometry::RealPoint2D > >& points );
        css::uno::Reference< css::rendering::XBezierPolyPolygon2D > createCompatibleBezierPolyPolygon(
            const css::uno::Reference< css::rendering::XGraphicDevice >&                                       rDevice,
            const css::uno::Sequence< css::uno::Sequence< css::geometry::RealBezierSegment2D > >& points );
        css::uno::Reference< css::rendering::XBitmap > createCompatibleBitmap(
            const css::uno::Reference< css::rendering::XGraphicDevice >&  rDevice,
            const css::geometry::IntegerSize2D&                                        size );
        css::uno::Reference< css::rendering::XVolatileBitmap > createVolatileBitmap(
            const css::uno::Reference< css::rendering::XGraphicDevice >&  rDevice,
            const css::geometry::IntegerSize2D&                                        size );
        css::uno::Reference< css::rendering::XBitmap > createCompatibleAlphaBitmap(
            const css::uno::Reference< css::rendering::XGraphicDevice >&  rDevice,
            const css::geometry::IntegerSize2D&                                        size );
        css::uno::Reference< css::rendering::XVolatileBitmap > createVolatileAlphaBitmap(
            const css::uno::Reference< css::rendering::XGraphicDevice >&  rDevice,
            const css::geometry::IntegerSize2D&                                        size );
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        css::uno::Any isAccelerated() const;
        css::uno::Any getDeviceHandle() const;
        css::uno::Any getSurfaceHandle() const;
        css::uno::Reference<
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            css::rendering::XColorSpace > const & getColorSpace() const;
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        /** called when DumpScreenContent property is enabled on
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            XGraphicDevice, and writes out bitmaps of current screen.
         */
        void dumpScreenContent() const;

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        OutputDevice* getOutputDevice() const { return mpRefDevice; }
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        const ::cairo::SurfaceSharedPtr& getSurface() { return mpSurface; }
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        ::cairo::SurfaceSharedPtr createSurface( const ::basegfx::B2ISize& rSize, int aContent );
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        ::cairo::SurfaceSharedPtr createSurface( BitmapSystemData const & rData, const Size& rSize );
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    protected:
        /** init helper
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            @param rCanvas
            Owning canvas.

            @param rRefDevice
            Reference output device. Needed for resolution
            calculations etc.
         */
        void implInit( SurfaceProvider& rSurfaceProvider,
                       OutputDevice&    rRefDevice );
        void setSize( const ::basegfx::B2ISize& rSize );
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    private:
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        /** Surface provider

            Deliberately not a refcounted reference, because of
            potential circular references for canvas. Provides us with
            our output surface and associated functionality.
         */
        SurfaceProvider*          mpSurfaceProvider;

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        VclPtr<OutputDevice>      mpRefDevice;
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        ::cairo::SurfaceSharedPtr mpSurface;
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    };
}

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#endif
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