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Diffstat (limited to '')
| -rw-r--r-- | vcl/unx/generic/gdi/X11CairoSalGraphicsImpl.cxx | 185 |
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: */ |