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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: */
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