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>
142 lines
4.1 KiB
C++
142 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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* 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 IOS
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#include <headless/svpbmp.hxx>
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#include <headless/svpinst.hxx>
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#include <headless/svpvd.hxx>
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#include <headless/svpgdi.hxx>
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#include <basegfx/vector/b2ivector.hxx>
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#include <comphelper/lok.hxx>
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#include <cairo.h>
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using namespace basegfx;
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SvpSalVirtualDevice::SvpSalVirtualDevice(cairo_surface_t* pRefSurface, cairo_surface_t* pPreExistingTarget)
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: m_pRefSurface(pRefSurface)
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, m_pSurface(pPreExistingTarget)
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, m_bOwnsSurface(!pPreExistingTarget)
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{
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cairo_surface_reference(m_pRefSurface);
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}
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SvpSalVirtualDevice::~SvpSalVirtualDevice()
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{
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if (m_bOwnsSurface)
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cairo_surface_destroy(m_pSurface);
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cairo_surface_destroy(m_pRefSurface);
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}
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SvpSalGraphics* SvpSalVirtualDevice::AddGraphics(SvpSalGraphics* pGraphics)
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{
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pGraphics->setSurface(m_pSurface, m_aFrameSize);
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m_aGraphics.push_back(pGraphics);
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return pGraphics;
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}
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SalGraphics* SvpSalVirtualDevice::AcquireGraphics()
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{
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return AddGraphics(new SvpSalGraphics());
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}
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void SvpSalVirtualDevice::ReleaseGraphics( SalGraphics* pGraphics )
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{
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m_aGraphics.erase(std::remove(m_aGraphics.begin(), m_aGraphics.end(), dynamic_cast<SvpSalGraphics*>(pGraphics)), m_aGraphics.end());
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delete pGraphics;
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}
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bool SvpSalVirtualDevice::SetSize( tools::Long nNewDX, tools::Long nNewDY )
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{
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return SetSizeUsingBuffer(nNewDX, nNewDY, nullptr);
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}
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void SvpSalVirtualDevice::CreateSurface(tools::Long nNewDX, tools::Long nNewDY, sal_uInt8 *const pBuffer)
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{
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if (m_pSurface)
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{
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cairo_surface_destroy(m_pSurface);
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}
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if (pBuffer)
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{
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double fXScale, fYScale;
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if (comphelper::LibreOfficeKit::isActive())
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{
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// Force scaling of the painting
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fXScale = fYScale = comphelper::LibreOfficeKit::getDPIScale();
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}
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else
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{
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dl_cairo_surface_get_device_scale(m_pRefSurface, &fXScale, &fYScale);
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nNewDX *= fXScale;
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nNewDY *= fYScale;
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}
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m_pSurface = cairo_image_surface_create_for_data(pBuffer, CAIRO_FORMAT_ARGB32,
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nNewDX, nNewDY, cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, nNewDX));
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dl_cairo_surface_set_device_scale(m_pSurface, fXScale, fYScale);
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}
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else
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{
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m_pSurface = cairo_surface_create_similar(m_pRefSurface, CAIRO_CONTENT_COLOR_ALPHA, nNewDX, nNewDY);
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}
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}
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bool SvpSalVirtualDevice::SetSizeUsingBuffer( tools::Long nNewDX, tools::Long nNewDY,
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sal_uInt8 *const pBuffer)
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{
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if (nNewDX == 0)
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nNewDX = 1;
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if (nNewDY == 0)
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nNewDY = 1;
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if (!m_pSurface || m_aFrameSize.getX() != nNewDX ||
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m_aFrameSize.getY() != nNewDY)
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{
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m_aFrameSize = basegfx::B2IVector(nNewDX, nNewDY);
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if (m_bOwnsSurface)
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CreateSurface(nNewDX, nNewDY, pBuffer);
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assert(m_pSurface);
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// update device in existing graphics
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for (auto const& graphic : m_aGraphics)
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graphic->setSurface(m_pSurface, m_aFrameSize);
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}
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return true;
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}
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tools::Long SvpSalVirtualDevice::GetWidth() const
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{
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return m_pSurface ? m_aFrameSize.getX() : 0;
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}
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tools::Long SvpSalVirtualDevice::GetHeight() const
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{
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return m_pSurface ? m_aFrameSize.getY() : 0;
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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