vcl: Introduce SvpGraphicsBackend

SvpGraphicsBackend contains the implementation of the graphic
drawing backend, which uses cairo for drawing. Currently the
cairo based graphic drawing implementation is on SvpSalGraphics,
but will be steb-by-step moved into SvpGraphicsBackend, just like
with other vcl plugins.

Change-Id: I70c94f08c5bd1d705f2faeacb66373ddf12f494a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/127702
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

5 files changed, 362 insertions, 2 deletions

diff --git a/vcl/Library_vcl.mk b/vcl/Library_vcl.mk
index cd6826c6dbba..02eadd06805a 100644
--- a/vcl/Library_vcl.mk
+++ b/vcl/Library_vcl.mk
@@ -526,6 +526,7 @@ vcl_headless_code= \
     $(if $(filter-out iOS,$(OS)), \
         vcl/headless/svpbmp \
         vcl/headless/svpgdi \
+        vcl/headless/SvpGraphicsBackend \
         $(if $(ENABLE_HEADLESS),vcl/headless/svpdata) \
     ) \
     vcl/headless/svpdummies \
diff --git a/vcl/headless/SvpGraphicsBackend.cxx b/vcl/headless/SvpGraphicsBackend.cxx
new file mode 100644
index 000000000000..d8688f7cefd5
--- /dev/null
+++ b/vcl/headless/SvpGraphicsBackend.cxx
@@ -0,0 +1,223 @@
+/* -*- 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 .
+ */
+
+#include <headless/SvpGraphicsBackend.hxx>
+
+#include <sal/log.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <vcl/BitmapTools.hxx>
+
+SvpGraphicsBackend::SvpGraphicsBackend() {}
+
+void SvpGraphicsBackend::Init() {}
+
+void SvpGraphicsBackend::freeResources() {}
+
+bool SvpGraphicsBackend::setClipRegion(const vcl::Region& /*i_rClip*/) { return false; }
+
+void SvpGraphicsBackend::ResetClipRegion() {}
+
+sal_uInt16 SvpGraphicsBackend::GetBitCount() const { return 0; }
+
+tools::Long SvpGraphicsBackend::GetGraphicsWidth() const { return 0; }
+
+void SvpGraphicsBackend::SetLineColor() {}
+
+void SvpGraphicsBackend::SetLineColor(Color /*nColor*/) {}
+
+void SvpGraphicsBackend::SetFillColor() {}
+
+void SvpGraphicsBackend::SetFillColor(Color /*nColor*/) {}
+
+void SvpGraphicsBackend::SetXORMode(bool /*bSet*/, bool /*bInvertOnly*/) {}
+
+void SvpGraphicsBackend::SetROPLineColor(SalROPColor /*nROPColor*/) {}
+
+void SvpGraphicsBackend::SetROPFillColor(SalROPColor /*nROPColor*/) {}
+
+void SvpGraphicsBackend::drawPixel(tools::Long /*nX*/, tools::Long /*nY*/) {}
+
+void SvpGraphicsBackend::drawPixel(tools::Long /*nX*/, tools::Long /*nY*/, Color /*aColor*/) {}
+
+void SvpGraphicsBackend::drawLine(tools::Long /*nX1*/, tools::Long /*nY1*/, tools::Long /*nX2*/,
+                                  tools::Long /*nY2*/)
+{
+}
+
+void SvpGraphicsBackend::drawRect(tools::Long /*nX*/, tools::Long /*nY*/, tools::Long /*nWidth*/,
+                                  tools::Long /*nHeight*/)
+{
+}
+
+void SvpGraphicsBackend::drawPolyLine(sal_uInt32 /*nPoints*/, const Point* /*pPtAry*/) {}
+
+void SvpGraphicsBackend::drawPolygon(sal_uInt32 /*nPoints*/, const Point* /*pPtAry*/) {}
+
+void SvpGraphicsBackend::drawPolyPolygon(sal_uInt32 /*nPoly*/, const sal_uInt32* /*pPointCounts*/,
+                                         const Point** /*pPtAry*/)
+{
+}
+
+bool SvpGraphicsBackend::drawPolyPolygon(const basegfx::B2DHomMatrix& /*rObjectToDevice*/,
+                                         const basegfx::B2DPolyPolygon& /*rPolyPolygon*/,
+                                         double /*fTransparency*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::drawPolyLine(const basegfx::B2DHomMatrix& /*rObjectToDevice*/,
+                                      const basegfx::B2DPolygon& /*rPolyLine*/,
+                                      double /*fTransparency*/, double /*fLineWidth*/,
+                                      const std::vector<double>* /*pStroke*/,
+                                      basegfx::B2DLineJoin /*eLineJoin*/,
+                                      css::drawing::LineCap /*eLineCap*/,
+                                      double /*fMiterMinimumAngle*/, bool /*bPixelSnapHairline*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::drawPolyLineBezier(sal_uInt32, const Point*, const PolyFlags*)
+{
+    SAL_INFO("vcl.gdi", "unsupported SvpSalGraphics::drawPolyLineBezier case");
+    return false;
+}
+
+bool SvpGraphicsBackend::drawPolygonBezier(sal_uInt32, const Point*, const PolyFlags*)
+{
+    SAL_INFO("vcl.gdi", "unsupported SvpSalGraphics::drawPolygonBezier case");
+    return false;
+}
+
+bool SvpGraphicsBackend::drawPolyPolygonBezier(sal_uInt32, const sal_uInt32*, const Point* const*,
+                                               const PolyFlags* const*)
+{
+    SAL_INFO("vcl.gdi", "unsupported SvpSalGraphics::drawPolyPolygonBezier case");
+    return false;
+}
+
+void SvpGraphicsBackend::copyArea(tools::Long /*nDestX*/, tools::Long /*nDestY*/,
+                                  tools::Long /*nSrcX*/, tools::Long /*nSrcY*/,
+                                  tools::Long /*nSrcWidth*/, tools::Long /*nSrcHeight*/,
+                                  bool /*bWindowInvalidate*/)
+{
+}
+
+void SvpGraphicsBackend::copyBits(const SalTwoRect& /*rTR*/, SalGraphics* /*pSrcGraphics*/) {}
+
+void SvpGraphicsBackend::drawBitmap(const SalTwoRect& /*rPosAry*/, const SalBitmap& /*rSalBitmap*/)
+{
+}
+
+void SvpGraphicsBackend::drawBitmap(const SalTwoRect& /*rPosAry*/, const SalBitmap& /*rSalBitmap*/,
+                                    const SalBitmap& /*rMaskBitmap*/)
+{
+}
+
+void SvpGraphicsBackend::drawMask(const SalTwoRect& /*rPosAry*/, const SalBitmap& /*rSalBitmap*/,
+                                  Color /*nMaskColor*/)
+{
+}
+
+std::shared_ptr<SalBitmap> SvpGraphicsBackend::getBitmap(tools::Long /*nX*/, tools::Long /*nY*/,
+                                                         tools::Long /*nWidth*/,
+                                                         tools::Long /*nHeight*/)
+{
+    return std::shared_ptr<SalBitmap>();
+}
+
+Color SvpGraphicsBackend::getPixel(tools::Long /*nX*/, tools::Long /*nY*/) { return Color(); }
+
+void SvpGraphicsBackend::invert(tools::Long /*nX*/, tools::Long /*nY*/, tools::Long /*nWidth*/,
+                                tools::Long /*nHeight*/, SalInvert /*nFlags*/)
+{
+}
+
+void SvpGraphicsBackend::invert(sal_uInt32 /*nPoints*/, const Point* /*pPtAry*/,
+                                SalInvert /*nFlags*/)
+{
+}
+
+bool SvpGraphicsBackend::drawEPS(tools::Long /*nX*/, tools::Long /*nY*/, tools::Long /*nWidth*/,
+                                 tools::Long /*nHeight*/, void* /*pPtr*/, sal_uInt32 /*nSize*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::blendBitmap(const SalTwoRect& /*rPosAry*/, const SalBitmap& /*rBitmap*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::blendAlphaBitmap(const SalTwoRect& /*rPosAry*/,
+                                          const SalBitmap& /*rSrcBitmap*/,
+                                          const SalBitmap& /*rMaskBitmap*/,
+                                          const SalBitmap& /*rAlphaBitmap*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::drawAlphaBitmap(const SalTwoRect&, const SalBitmap& /*rSourceBitmap*/,
+                                         const SalBitmap& /*rAlphaBitmap*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::drawTransformedBitmap(const basegfx::B2DPoint& /*rNull*/,
+                                               const basegfx::B2DPoint& /*rX*/,
+                                               const basegfx::B2DPoint& /*rY*/,
+                                               const SalBitmap& /*rSourceBitmap*/,
+                                               const SalBitmap* /*pAlphaBitmap*/, double /*fAlpha*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::hasFastDrawTransformedBitmap() const { return false; }
+
+bool SvpGraphicsBackend::drawAlphaRect(tools::Long /*nX*/, tools::Long /*nY*/,
+                                       tools::Long /*nWidth*/, tools::Long /*nHeight*/,
+                                       sal_uInt8 /*nTransparency*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::drawGradient(const tools::PolyPolygon& /*rPolyPolygon*/,
+                                      const Gradient& /*rGradient*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::implDrawGradient(basegfx::B2DPolyPolygon const& /*rPolyPolygon*/,
+                                          SalGradient const& /*rGradient*/)
+{
+    return false;
+}
+
+bool SvpGraphicsBackend::supportsOperation(OutDevSupportType eType) const
+{
+    switch (eType)
+    {
+        case OutDevSupportType::TransparentRect:
+        case OutDevSupportType::B2DDraw:
+            return true;
+    }
+    return false;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/headless/svpgdi.cxx b/vcl/headless/svpgdi.cxx
index ac375c3fadf0..223956076471 100644
--- a/vcl/headless/svpgdi.cxx
+++ b/vcl/headless/svpgdi.cxx
@@ -919,6 +919,7 @@ SvpSalGraphics::SvpSalGraphics()
     , m_aFillColor(Color(0xFF, 0xFF, 0XFF))
     , m_ePaintMode(PaintMode::Over)
     , m_aTextRenderImpl(*this)
+    , m_pBackend(new SvpGraphicsBackend())
 {
     bool bLOKActive = comphelper::LibreOfficeKit::isActive();
     initWidgetDrawBackends(bLOKActive);
diff --git a/vcl/inc/headless/SvpGraphicsBackend.hxx b/vcl/inc/headless/SvpGraphicsBackend.hxx
new file mode 100644
index 000000000000..a21e886abf7f
--- /dev/null
+++ b/vcl/inc/headless/SvpGraphicsBackend.hxx
@@ -0,0 +1,132 @@
+/* -*- 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 <vcl/dllapi.h>
+#include <tools/long.hxx>
+#include <tools/color.hxx>
+#include <salgdiimpl.hxx>
+#include <salgdi.hxx>
+
+class VCL_DLLPUBLIC SvpGraphicsBackend : public SalGraphicsImpl
+{
+public:
+    SvpGraphicsBackend();
+
+    void Init() override;
+
+    void freeResources() override;
+
+    OUString getRenderBackendName() const override { return "svp"; }
+
+    bool setClipRegion(vcl::Region const& rRegion) override;
+    void ResetClipRegion() override;
+
+    sal_uInt16 GetBitCount() const override;
+
+    tools::Long GetGraphicsWidth() const override;
+
+    void SetLineColor() override;
+    void SetLineColor(Color nColor) override;
+    void SetFillColor() override;
+    void SetFillColor(Color nColor) override;
+    void SetXORMode(bool bSet, bool bInvertOnly) override;
+    void SetROPLineColor(SalROPColor nROPColor) override;
+    void SetROPFillColor(SalROPColor nROPColor) override;
+
+    void drawPixel(tools::Long nX, tools::Long nY) override;
+    void drawPixel(tools::Long nX, tools::Long nY, Color nColor) override;
+
+    void drawLine(tools::Long nX1, tools::Long nY1, tools::Long nX2, tools::Long nY2) override;
+    void drawRect(tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight) override;
+    void drawPolyLine(sal_uInt32 nPoints, const Point* pPointArray) override;
+    void drawPolygon(sal_uInt32 nPoints, const Point* pPointArray) override;
+    void drawPolyPolygon(sal_uInt32 nPoly, const sal_uInt32* pPoints,
+                         const Point** pPointArray) override;
+
+    bool drawPolyPolygon(const basegfx::B2DHomMatrix& rObjectToDevice,
+                         const basegfx::B2DPolyPolygon&, double fTransparency) override;
+
+    bool drawPolyLine(const basegfx::B2DHomMatrix& rObjectToDevice, const basegfx::B2DPolygon&,
+                      double fTransparency, double fLineWidth, const std::vector<double>* pStroke,
+                      basegfx::B2DLineJoin, css::drawing::LineCap, double fMiterMinimumAngle,
+                      bool bPixelSnapHairline) override;
+
+    bool drawPolyLineBezier(sal_uInt32 nPoints, const Point* pPointArray,
+                            const PolyFlags* pFlagArray) override;
+
+    bool drawPolygonBezier(sal_uInt32 nPoints, const Point* pPointArray,
+                           const PolyFlags* pFlagArray) override;
+
+    bool drawPolyPolygonBezier(sal_uInt32 nPoly, const sal_uInt32* pPoints,
+                               const Point* const* pPointArray,
+                               const PolyFlags* const* pFlagArray) override;
+
+    void copyArea(tools::Long nDestX, tools::Long nDestY, tools::Long nSrcX, tools::Long nSrcY,
+                  tools::Long nSrcWidth, tools::Long nSrcHeight, bool bWindowInvalidate) override;
+
+    void copyBits(const SalTwoRect& rPosAry, SalGraphics* pSrcGraphics) override;
+
+    void drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap) override;
+
+    void drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap,
+                    const SalBitmap& rMaskBitmap) override;
+
+    void drawMask(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap,
+                  Color nMaskColor) override;
+
+    std::shared_ptr<SalBitmap> getBitmap(tools::Long nX, tools::Long nY, tools::Long nWidth,
+                                         tools::Long nHeight) override;
+
+    Color getPixel(tools::Long nX, tools::Long nY) override;
+
+    void invert(tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight,
+                SalInvert nFlags) override;
+
+    void invert(sal_uInt32 nPoints, const Point* pPtAry, SalInvert nFlags) override;
+
+    bool drawEPS(tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight,
+                 void* pPtr, sal_uInt32 nSize) override;
+
+    bool blendBitmap(const SalTwoRect&, const SalBitmap& rBitmap) override;
+
+    bool blendAlphaBitmap(const SalTwoRect&, const SalBitmap& rSrcBitmap,
+                          const SalBitmap& rMaskBitmap, const SalBitmap& rAlphaBitmap) override;
+
+    bool drawAlphaBitmap(const SalTwoRect&, const SalBitmap& rSourceBitmap,
+                         const SalBitmap& rAlphaBitmap) override;
+
+    bool drawTransformedBitmap(const basegfx::B2DPoint& rNull, const basegfx::B2DPoint& rX,
+                               const basegfx::B2DPoint& rY, const SalBitmap& rSourceBitmap,
+                               const SalBitmap* pAlphaBitmap, double fAlpha) override;
+
+    bool hasFastDrawTransformedBitmap() const override;
+
+    bool drawAlphaRect(tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight,
+                       sal_uInt8 nTransparency) override;
+
+    bool drawGradient(const tools::PolyPolygon& rPolygon, const Gradient& rGradient) override;
+    bool implDrawGradient(basegfx::B2DPolyPolygon const& rPolyPolygon,
+                          SalGradient const& rGradient) override;
+
+    bool supportsOperation(OutDevSupportType eType) const override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/headless/svpgdi.hxx b/vcl/inc/headless/svpgdi.hxx
index 32168d87e727..44aba3587276 100644
--- a/vcl/inc/headless/svpgdi.hxx
+++ b/vcl/inc/headless/svpgdi.hxx
@@ -35,6 +35,7 @@
 #include <sallayout.hxx>
 #include "svpcairotextrender.hxx"
 #include <impfontmetricdata.hxx>
+#include "SvpGraphicsBackend.hxx"
 
 #include <cairo.h>
 
@@ -87,7 +88,7 @@ struct VCL_DLLPUBLIC DamageHandler
     damageHandler damaged;
 };
 
-class VCL_DLLPUBLIC SvpSalGraphics : public SalGraphics
+class VCL_DLLPUBLIC SvpSalGraphics : public SalGraphicsAutoDelegateToImpl
 {
     cairo_surface_t*               m_pSurface;
     basegfx::B2IVector             m_aFrameSize;
@@ -132,6 +133,7 @@ private:
 protected:
     vcl::Region                         m_aClipRegion;
     SvpCairoTextRender                  m_aTextRenderImpl;
+    std::unique_ptr<SvpGraphicsBackend> m_pBackend;
 
 protected:
     virtual bool blendBitmap( const SalTwoRect&, const SalBitmap& rBitmap ) override;
@@ -156,7 +158,8 @@ public:
     SvpSalGraphics();
     virtual ~SvpSalGraphics() override;
 
-    virtual SalGraphicsImpl* GetImpl() const override { return nullptr; };
+    virtual SalGraphicsImpl* GetImpl() const override { return m_pBackend.get(); }
+
     virtual void            GetResolution( sal_Int32& rDPIX, sal_Int32& rDPIY ) override;
     virtual sal_uInt16      GetBitCount() const override;
     virtual tools::Long            GetGraphicsWidth() const override;