b153d147c9
Rather use a proper alpha channel if we need transparency. This is another small step towards merged alpha in our vcl layer. I suspect the intent in a lot of this code was to save memory. Which have been a thing way back then, but these days our backends mostly end up doing a copy-and-convert to a real alpha channel anyway, so the existing code is actually now a pessimisation. Change-Id: I4a2bcbb2f76b841f05bc00580f364492829c69de Reviewed-on: https://gerrit.libreoffice.org/c/core/+/114808 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
189 lines
7.3 KiB
C++
189 lines
7.3 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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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_VCL_VIRDEV_HXX
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#define INCLUDED_VCL_VIRDEV_HXX
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#include <vcl/dllapi.h>
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#include <vcl/outdev.hxx>
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#include <vcl/salgtype.hxx>
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#include <memory>
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class SalVirtualDevice;
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struct SystemGraphicsData;
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typedef struct _cairo_surface cairo_surface_t;
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class SAL_WARN_UNUSED VCL_DLLPUBLIC VirtualDevice : public OutputDevice
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{
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friend class Application;
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friend class ::OutputDevice;
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friend class Printer;
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friend cairo_surface_t* get_underlying_cairo_surface(const VirtualDevice&);
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public:
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// reference device modes for different compatibility levels
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enum class RefDevMode { NONE = 0,
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Dpi600 = 1, // 600 dpi
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MSO1 = 3,
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PDF1 = 4,
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Custom = 5
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};
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private:
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std::unique_ptr<SalVirtualDevice> mpVirDev;
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VclPtr<VirtualDevice> mpPrev;
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VclPtr<VirtualDevice> mpNext;
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sal_uInt16 mnBitCount;
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bool mbScreenComp;
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const DeviceFormat meFormat;
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const DeviceFormat meAlphaFormat;
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RefDevMode meRefDevMode;
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bool mbForceZeroExtleadBug;
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SAL_DLLPRIVATE void ImplInitVirDev( const OutputDevice* pOutDev, tools::Long nDX, tools::Long nDY, const SystemGraphicsData *pData = nullptr );
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SAL_DLLPRIVATE bool InnerImplSetOutputSizePixel( const Size& rNewSize, bool bErase,
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sal_uInt8* pBuffer );
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SAL_DLLPRIVATE bool ImplSetOutputSizePixel( const Size& rNewSize, bool bErase,
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sal_uInt8* pBuffer );
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VirtualDevice (const VirtualDevice &) = delete;
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VirtualDevice & operator= (const VirtualDevice &) = delete;
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/** Used for alpha VDev, to set areas to opaque
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@since \#i32109#
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*/
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SAL_DLLPRIVATE void ImplFillOpaqueRectangle( const tools::Rectangle& rRect );
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protected:
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virtual bool AcquireGraphics() const override;
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virtual void ReleaseGraphics( bool bRelease = true ) override;
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/** Create a virtual device of size 1x1
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@param pCompDev
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The generated vdev will be compatible to this device.
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If it's the nullptr, it uses Application::GetDefaultDevice().
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@param eFormat
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Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
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indicate: take default screen depth.
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@param eAlphaFormat
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Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
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indicate: take default screen depth.
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@param eOutDevType
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This real virtual output device type.
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*/
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explicit VirtualDevice(const OutputDevice* pCompDev, DeviceFormat eFormat,
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DeviceFormat eAlphaFormat, OutDevType eOutDevType);
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public:
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/** Create a virtual device of size 1x1
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@param eFormat
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Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
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indicate: take default screen depth.
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@param eAlphaFormat
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Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
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indicate: take default screen depth.
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*/
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explicit VirtualDevice(DeviceFormat eFormat = DeviceFormat::DEFAULT, DeviceFormat eAlphaFormat = DeviceFormat::NONE)
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: VirtualDevice(nullptr, eFormat, eAlphaFormat, OUTDEV_VIRDEV) {}
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/** Create a virtual device of size 1x1
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@param rCompDev
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The generated vdev will be compatible to this device.
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@param eFormat
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Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
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indicate: take default screen depth.
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*/
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explicit VirtualDevice(const OutputDevice& rCompDev,
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DeviceFormat eFormat = DeviceFormat::DEFAULT)
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: VirtualDevice(&rCompDev, eFormat, DeviceFormat::NONE, OUTDEV_VIRDEV) {}
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/** Create a virtual device of size 1x1 with alpha channel
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@param rCompDev
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The generated vdev will be compatible to this device.
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@param eFormat
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Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
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indicate: take default screen depth.
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@param eAlphaFormat
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Device format of the generated virtual device. Use DeviceFormat::DEFAULT here, to
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indicate: take default screen depth.
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*/
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explicit VirtualDevice(const OutputDevice& rCompDev,
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DeviceFormat eFormat, DeviceFormat eAlphaFormat)
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: VirtualDevice(&rCompDev, eFormat, eAlphaFormat, OUTDEV_VIRDEV) {}
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/** Create a virtual device using an existing system dependent device or graphics context
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Any rendering will happen directly on the context and not on any intermediate bitmap.
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Note: This might not be supported on all platforms !
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*/
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explicit VirtualDevice(const SystemGraphicsData& rData, const Size &rSize,
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DeviceFormat eFormat);
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virtual ~VirtualDevice() override;
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virtual void dispose() override;
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bool CanEnableNativeWidget() const override;
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virtual void EnableRTL( bool bEnable = true ) override;
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bool SetOutputSizePixel( const Size& rNewSize, bool bErase = true );
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bool SetOutputSizePixelScaleOffsetAndBuffer( const Size& rNewSize,
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const Fraction& rScale,
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const Point& rNewOffset,
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sal_uInt8* pBuffer);
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bool SetOutputSize( const Size& rNewSize )
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{ return SetOutputSizePixel( LogicToPixel( rNewSize ) ); }
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void SetReferenceDevice( RefDevMode );
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void Compat_ZeroExtleadBug(); // enable workaround for #i60495#
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void SetReferenceDevice( sal_Int32 i_nDPIX, sal_Int32 i_nDPIY );
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virtual sal_uInt16 GetBitCount() const override;
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bool IsVirtual() const override;
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bool IsScreenComp() const override { return mbScreenComp; }
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private:
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SAL_DLLPRIVATE void ImplSetReferenceDevice( RefDevMode, sal_Int32 i_nDPIX, sal_Int32 i_nDPIY );
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protected:
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virtual bool UsePolyPolygonForComplexGradient() override;
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virtual tools::Long GetFontExtLeading() const override;
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};
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#endif // INCLUDED_VCL_VIRDEV_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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