tdf#125673 KDE5 implement a KDE5SalVirtualDevice

We just need AcquireGraphics() to return a KDE5Graphics.
Otherwise the BufferDevice's SVP will use a SvpSalGraphics
instead of the KDE5Graphics, which knows about Qt's theming.

Change-Id: I0ea646df260f2067d61c753f03dee01a003f382a
Reviewed-on: https://gerrit.libreoffice.org/73673
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

vcl/headless/svpvd.cxx

@@ -45,12 +45,16 @@ SvpSalVirtualDevice::~SvpSalVirtualDevice()
     cairo_surface_destroy(m_pRefSurface);
 }
 
+SvpSalGraphics* SvpSalVirtualDevice::AddGraphics(SvpSalGraphics* pGraphics)
+{
+    pGraphics->setSurface(m_pSurface, m_aFrameSize);
+    m_aGraphics.push_back(pGraphics);
+    return pGraphics;
+}
+
 SalGraphics* SvpSalVirtualDevice::AcquireGraphics()
 {
-    SvpSalGraphics* pGraphics = new SvpSalGraphics();
-    pGraphics->setSurface(m_pSurface, m_aFrameSize);
-    m_aGraphics.push_back( pGraphics );
-    return pGraphics;
+    return AddGraphics(new SvpSalGraphics());
 }
 
 void SvpSalVirtualDevice::ReleaseGraphics( SalGraphics* pGraphics )

vcl/inc/headless/svpvd.hxx

@@ -21,6 +21,8 @@
 #define INCLUDED_VCL_INC_HEADLESS_SVPVD_HXX
 
 #include <salvd.hxx>
+#include <vcl/salgtype.hxx>
+#include <basegfx/vector/b2ivector.hxx>
 
 #include <vector>
 
@@ -35,6 +37,9 @@ class VCL_DLLPUBLIC SvpSalVirtualDevice : public SalVirtualDevice
     basegfx::B2IVector                  m_aFrameSize;
     std::vector< SvpSalGraphics* >      m_aGraphics;
 
+protected:
+    SvpSalGraphics* AddGraphics(SvpSalGraphics* aGraphics);
+
 public:
     SvpSalVirtualDevice(DeviceFormat eFormat, cairo_surface_t* pRefSurface);
     virtual ~SvpSalVirtualDevice() override;

vcl/source/window/bufferdevice.cxx

@@ -12,7 +12,7 @@
 namespace vcl
 {
 BufferDevice::BufferDevice(const VclPtr<vcl::Window>& pWindow, vcl::RenderContext& rRenderContext)
-    : m_pBuffer(VclPtr<VirtualDevice>::Create())
+    : m_pBuffer(VclPtr<VirtualDevice>::Create(rRenderContext))
     , m_pWindow(pWindow)
     , m_rRenderContext(rRenderContext)
 {

vcl/unx/kde5/KDE5SalGraphics.cxx

@@ -40,7 +40,7 @@ static void QImage2BitmapBuffer(QImage* pImg, BitmapBuffer* pBuf)
 }
 
 KDE5SalGraphics::KDE5SalGraphics(Qt5Frame* pFrame)
-    : Qt5SvpGraphics(pFrame->GetQWidget())
+    : Qt5SvpGraphics(pFrame ? pFrame->GetQWidget() : nullptr)
     , m_pFrame(pFrame)
 {
 }

vcl/unx/kde5/KDE5SalInstance.cxx

@@ -28,8 +28,9 @@
 #include <Qt5Data.hxx>
 
 #include "KDE5FilePicker.hxx"
-#include "KDE5SalInstance.hxx"
 #include "KDE5SalFrame.hxx"
+#include "KDE5SalInstance.hxx"
+#include "KDE5SalVirtualDevice.hxx"
 
 using namespace com::sun::star;
 
@@ -69,6 +70,22 @@ Qt5FilePicker* KDE5SalInstance::createPicker(QFileDialog::FileMode eMode)
     return Qt5Instance::createPicker(eMode);
 }
 
+std::unique_ptr<SalVirtualDevice> KDE5SalInstance::CreateVirtualDevice(SalGraphics* pGraphics,
+                                                                       long& nDX, long& nDY,
+                                                                       DeviceFormat eFormat,
+                                                                       const SystemGraphicsData*)
+{
+    std::unique_ptr<SalVirtualDevice> pVD;
+    assert(pGraphics);
+    RunInMainThread(std::function([&]() {
+        KDE5SalGraphics* pKDE5Graphics = dynamic_cast<KDE5SalGraphics*>(pGraphics);
+        assert(pKDE5Graphics);
+        pVD.reset(new KDE5SalVirtualDevice(eFormat, pKDE5Graphics->getSurface()));
+        pVD->SetSize(nDX, nDY);
+    }));
+    return pVD;
+}
+
 extern "C" {
 VCLPLUG_KDE5_PUBLIC SalInstance* create_SalInstance()
 {

vcl/unx/kde5/KDE5SalInstance.hxx

@@ -30,6 +30,10 @@ class KDE5SalInstance final : public Qt5Instance
 
 public:
     explicit KDE5SalInstance(std::unique_ptr<QApplication>& pQApp);
+
+    std::unique_ptr<SalVirtualDevice>
+    CreateVirtualDevice(SalGraphics*, long&, long&, DeviceFormat,
+                        const SystemGraphicsData* = nullptr) override;
 };
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/unx/kde5/KDE5SalVirtualDevice.hxx

@@ -0,0 +1,36 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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 .
+ */
+
+#pragma once
+
+#include <headless/svpvd.hxx>
+#include "KDE5SalGraphics.hxx"
+
+class VCL_DLLPUBLIC KDE5SalVirtualDevice : public SvpSalVirtualDevice
+{
+public:
+    KDE5SalVirtualDevice(DeviceFormat eFormat, cairo_surface_t* pRefSurface)
+        : SvpSalVirtualDevice(eFormat, pRefSurface)
+    {
+    }
+
+    SalGraphics* AcquireGraphics() override { return AddGraphics(new KDE5SalGraphics(nullptr)); }
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */