Quelle  cairo_devicehelper.hxx   Sprache: C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#pragma once

#include <com/sun/star/rendering/XGraphicDevice.hpp>

#include <vcl/outdev.hxx>

#include "cairo_surfaceprovider.hxx"

/* Definition of DeviceHelper class */

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

        DeviceHelper();

        /** init helper

            @param rCanvas
            Owning canvas.

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

        /// Dispose all internal references
        void disposing();

        // XWindowGraphicDevice
        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 );

        css::uno::Any isAccelerated() const;
        css::uno::Any getDeviceHandle() const;
        css::uno::Any getSurfaceHandle() const;
        css::uno::Reference<
            css::rendering::XColorSpace > const & getColorSpace() const;

        /** called when DumpScreenContent property is enabled on
            XGraphicDevice, and writes out bitmaps of current screen.
         */
        void dumpScreenContent() const;

        OutputDevice* getOutputDevice() const { return mpRefDevice; }
        const ::cairo::SurfaceSharedPtr& getSurface() const { return mpSurface; }
        ::cairo::SurfaceSharedPtr createSurface( const ::basegfx::B2ISize& rSize, int aContent );
        ::cairo::SurfaceSharedPtr createSurface( BitmapSystemData const & rData, const Size&&nbsp;rSize );

    protected:
        /** init helper

            @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 );

    private:
        /** 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;

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

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