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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx
parentInitial commit. (diff)
downloadlibreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz
libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx')
-rw-r--r--vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx185
1 files changed, 185 insertions, 0 deletions
diff --git a/vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx b/vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx
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+++ b/vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx
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+/* -*- 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: */