Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx b/vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx
new file mode 100644
index 000000000..2109e19b9
--- /dev/null
+++ b/vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx
@@ -0,0 +1,185 @@
+/* -*- 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 "X11CairoSalGraphicsImpl.hxx"
+
+#if ENABLE_CAIRO_CANVAS
+
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <basegfx/curve/b2dcubicbezier.hxx>
+
+X11CairoSalGraphicsImpl::X11CairoSalGraphicsImpl(X11SalGraphics& rParent, X11Common& rX11Common)
+    : X11SalGraphicsImpl(rParent)
+    , mrX11Common(rX11Common)
+    , mnPenColor(SALCOLOR_NONE)
+    , mnFillColor(SALCOLOR_NONE)
+{
+}
+
+bool X11CairoSalGraphicsImpl::drawPolyPolygon(const basegfx::B2DHomMatrix& rObjectToDevice,
+                                              const basegfx::B2DPolyPolygon& rPolyPolygon,
+                                              double fTransparency)
+{
+    if (fTransparency >= 1.0)
+    {
+        return true;
+    }
+
+    if (rPolyPolygon.count() == 0)
+    {
+        return true;
+    }
+
+    // Fallback: Transform to DeviceCoordinates
+    basegfx::B2DPolyPolygon aPolyPolygon(rPolyPolygon);
+    aPolyPolygon.transform(rObjectToDevice);
+
+    if (SALCOLOR_NONE == mnFillColor && SALCOLOR_NONE == mnPenColor)
+    {
+        return true;
+    }
+
+    // enable by setting to something
+    static const char* pUseCairoForPolygons(getenv("SAL_ENABLE_USE_CAIRO_FOR_POLYGONS"));
+
+    if (nullptr != pUseCairoForPolygons && mrX11Common.SupportsCairo())
+    {
+        // snap to raster if requested
+        const bool bSnapPoints(!getAntiAlias());
+
+        if (bSnapPoints)
+        {
+            aPolyPolygon = basegfx::utils::snapPointsOfHorizontalOrVerticalEdges(aPolyPolygon);
+        }
+
+        cairo_t* cr = mrX11Common.getCairoContext();
+        clipRegion(cr);
+
+        for (auto const& rPolygon : std::as_const(aPolyPolygon))
+        {
+            const sal_uInt32 nPointCount(rPolygon.count());
+
+            if (nPointCount)
+            {
+                const sal_uInt32 nEdgeCount(rPolygon.isClosed() ? nPointCount : nPointCount - 1);
+
+                if (nEdgeCount)
+                {
+                    basegfx::B2DCubicBezier aEdge;
+
+                    for (sal_uInt32 b = 0; b < nEdgeCount; ++b)
+                    {
+                        rPolygon.getBezierSegment(b, aEdge);
+
+                        if (!b)
+                        {
+                            const basegfx::B2DPoint aStart(aEdge.getStartPoint());
+                            cairo_move_to(cr, aStart.getX(), aStart.getY());
+                        }
+
+                        const basegfx::B2DPoint aEnd(aEdge.getEndPoint());
+
+                        if (aEdge.isBezier())
+                        {
+                            const basegfx::B2DPoint aCP1(aEdge.getControlPointA());
+                            const basegfx::B2DPoint aCP2(aEdge.getControlPointB());
+                            cairo_curve_to(cr, aCP1.getX(), aCP1.getY(), aCP2.getX(), aCP2.getY(),
+                                           aEnd.getX(), aEnd.getY());
+                        }
+                        else
+                        {
+                            cairo_line_to(cr, aEnd.getX(), aEnd.getY());
+                        }
+                    }
+
+                    cairo_close_path(cr);
+                }
+            }
+        }
+
+        if (SALCOLOR_NONE != mnFillColor)
+        {
+            cairo_set_source_rgba(cr, mnFillColor.GetRed() / 255.0, mnFillColor.GetGreen() / 255.0,
+                                  mnFillColor.GetBlue() / 255.0, 1.0 - fTransparency);
+            cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
+            cairo_fill_preserve(cr);
+        }
+
+        if (SALCOLOR_NONE != mnPenColor)
+        {
+            cairo_set_source_rgba(cr, mnPenColor.GetRed() / 255.0, mnPenColor.GetGreen() / 255.0,
+                                  mnPenColor.GetBlue() / 255.0, 1.0 - fTransparency);
+            cairo_stroke_preserve(cr);
+        }
+
+        X11Common::releaseCairoContext(cr);
+        return true;
+    }
+
+    return X11SalGraphicsImpl::drawPolyPolygon(rObjectToDevice, rPolyPolygon, fTransparency);
+}
+
+bool X11CairoSalGraphicsImpl::drawPolyLine(const basegfx::B2DHomMatrix& rObjectToDevice,
+                                           const basegfx::B2DPolygon& rPolygon,
+                                           double fTransparency, double fLineWidth,
+                                           const std::vector<double>* pStroke,
+                                           basegfx::B2DLineJoin eLineJoin,
+                                           css::drawing::LineCap eLineCap,
+                                           double fMiterMinimumAngle, bool bPixelSnapHairline)
+{
+    if (0 == rPolygon.count())
+    {
+        return true;
+    }
+
+    if (fTransparency >= 1.0)
+    {
+        return true;
+    }
+
+    // disable by setting to something
+    static const char* pUseCairoForFatLines(getenv("SAL_DISABLE_USE_CAIRO_FOR_FATLINES"));
+
+    if (nullptr == pUseCairoForFatLines && mrX11Common.SupportsCairo())
+    {
+        cairo_t* cr = mrX11Common.getCairoContext();
+        clipRegion(cr);
+
+        // Use the now available static drawPolyLine from the Cairo-Headless-Fallback
+        // that will take care of all needed stuff
+        const bool bRetval(CairoCommon::drawPolyLine(
+            cr, nullptr, mnPenColor, getAntiAlias(), rObjectToDevice, rPolygon, fTransparency,
+            fLineWidth, pStroke, eLineJoin, eLineCap, fMiterMinimumAngle, bPixelSnapHairline));
+
+        X11Common::releaseCairoContext(cr);
+
+        if (bRetval)
+        {
+            return true;
+        }
+    }
+
+    return X11SalGraphicsImpl::drawPolyLine(rObjectToDevice, rPolygon, fTransparency, fLineWidth,
+                                            pStroke, eLineJoin, eLineCap, fMiterMinimumAngle,
+                                            bPixelSnapHairline);
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */