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306 | /* -*- 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 <sal/config.h>
#include <com/sun/star/rendering/TextDirection.hpp>
#include <rtl/math.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <tools/diagnose_ex.h>
#include <vcl/canvastools.hxx>
#include <vcl/metric.hxx>
#include <vcl/virdev.hxx>
#include <canvas/canvastools.hxx>
#include <verifyinput.hxx>
#include <cairo.h>
#include "cairo_canvasfont.hxx"
#include "cairo_canvashelper.hxx"
#include "cairo_textlayout.hxx"
using namespace ::cairo;
using namespace ::com::sun::star;
namespace cairocanvas
{
uno::Reference< rendering::XCanvasFont > CanvasHelper::createFont( const rendering::XCanvas* ,
const rendering::FontRequest& fontRequest,
const uno::Sequence< beans::PropertyValue >& extraFontProperties,
const geometry::Matrix2D& fontMatrix )
{
return uno::Reference< rendering::XCanvasFont >( new CanvasFont( fontRequest, extraFontProperties, fontMatrix, mpSurfaceProvider ));
}
uno::Sequence< rendering::FontInfo > CanvasHelper::queryAvailableFonts( const rendering::XCanvas* ,
const rendering::FontInfo& /*aFilter*/,
const uno::Sequence< beans::PropertyValue >& /*aFontProperties*/ )
{
// TODO
return uno::Sequence< rendering::FontInfo >();
}
static bool
setupFontTransform( ::OutputDevice const & rOutDev,
::Point& o_rPoint,
vcl::Font& io_rVCLFont,
const rendering::ViewState& rViewState,
const rendering::RenderState& rRenderState )
{
::basegfx::B2DHomMatrix aMatrix;
::canvas::tools::mergeViewAndRenderTransform(aMatrix,
rViewState,
rRenderState);
::basegfx::B2DTuple aScale;
::basegfx::B2DTuple aTranslate;
double nRotate, nShearX;
aMatrix.decompose( aScale, aTranslate, nRotate, nShearX );
// query font metric _before_ tampering with width and height
if( !::rtl::math::approxEqual(aScale.getX(), aScale.getY()) )
{
// retrieve true font width
const sal_Int32 nFontWidth( rOutDev.GetFontMetric( io_rVCLFont ).GetAverageFontWidth() );
const sal_Int32 nScaledFontWidth( ::basegfx::fround(nFontWidth * aScale.getX()) );
if( !nScaledFontWidth )
{
// scale is smaller than one pixel - disable text
// output altogether
return false;
}
io_rVCLFont.SetAverageFontWidth( nScaledFontWidth );
}
if( !::rtl::math::approxEqual(aScale.getY(), 1.0) )
{
const sal_Int32 nFontHeight( io_rVCLFont.GetFontHeight() );
io_rVCLFont.SetFontHeight( ::basegfx::fround(nFontHeight * aScale.getY()) );
}
io_rVCLFont.SetOrientation( static_cast< short >( ::basegfx::fround(-fmod(nRotate, 2*M_PI)*(1800.0/M_PI)) ) );
// TODO(F2): Missing functionality in VCL: shearing
o_rPoint.setX( ::basegfx::fround(aTranslate.getX()) );
o_rPoint.setY( ::basegfx::fround(aTranslate.getY()) );
return true;
}
static int
setupOutDevState( OutputDevice& rOutDev,
const rendering::XCanvas* pOwner,
const rendering::ViewState& viewState,
const rendering::RenderState& renderState )
{
::canvas::tools::verifyInput( renderState,
OSL_THIS_FUNC,
const_cast<rendering::XCanvas*>(pOwner), // only for refcount
2,
3 /* text */ );
int nTransparency(0);
// TODO(P2): Don't change clipping all the time, maintain current clip
// state and change only when update is necessary
::canvas::tools::clipOutDev(viewState, renderState, rOutDev);
Color aColor( COL_WHITE );
if( renderState.DeviceColor.getLength() > 2 )
{
aColor = vcl::unotools::stdColorSpaceSequenceToColor( renderState.DeviceColor );
}
// extract alpha, and make color opaque
// afterwards. Otherwise, OutputDevice won't draw anything
nTransparency = aColor.GetTransparency();
aColor.SetTransparency(0);
rOutDev.SetTextColor( aColor );
return nTransparency;
}
namespace {
class DeviceSettingsGuard
{
private:
VclPtr<OutputDevice> mpVirtualDevice;
bool mbMappingWasEnabled;
public:
DeviceSettingsGuard(OutputDevice *pVirtualDevice)<--- Class 'DeviceSettingsGuard' has a constructor with 1 argument that is not explicit. [+]Class 'DeviceSettingsGuard' has a constructor with 1 argument that is not explicit. Such constructors should in general be explicit for type safety reasons. Using the explicit keyword in the constructor means some mistakes when using the class can be avoided.
: mpVirtualDevice(pVirtualDevice)
, mbMappingWasEnabled(mpVirtualDevice->IsMapModeEnabled())
{
mpVirtualDevice->Push();
mpVirtualDevice->EnableMapMode(false);
}
~DeviceSettingsGuard()
{
mpVirtualDevice->EnableMapMode(mbMappingWasEnabled);
mpVirtualDevice->Pop();
}
};
}
static bool setupTextOutput( OutputDevice& rOutDev,
const rendering::XCanvas* pOwner,
::Point& o_rOutPos,
const rendering::ViewState& viewState,
const rendering::RenderState& renderState,
const uno::Reference< rendering::XCanvasFont >& xFont )
{
setupOutDevState( rOutDev, pOwner, viewState, renderState );
CanvasFont* pFont = dynamic_cast< CanvasFont* >( xFont.get() );
ENSURE_ARG_OR_THROW( pFont,
"CanvasHelper::setupTextOutput(): Font not compatible with this canvas" );
vcl::Font aVCLFont = pFont->getVCLFont();
Color aColor( COL_BLACK );
if( renderState.DeviceColor.getLength() > 2 )
{
aColor = vcl::unotools::stdColorSpaceSequenceToColor(renderState.DeviceColor );
}
// setup font color
aVCLFont.SetColor( aColor );
aVCLFont.SetFillColor( aColor );
// no need to replicate this for mp2ndOutDev, we're modifying only aVCLFont here.
if( !setupFontTransform( rOutDev, o_rOutPos, aVCLFont, viewState, renderState ) )
return false;
rOutDev.SetFont( aVCLFont );
return true;
}
uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawText( const rendering::XCanvas* pOwner,
const rendering::StringContext& text,
const uno::Reference< rendering::XCanvasFont >& xFont,
const rendering::ViewState& viewState,
const rendering::RenderState& renderState,
sal_Int8 textDirection )
{
#ifdef CAIRO_CANVAS_PERF_TRACE
struct timespec aTimer;
mxDevice->startPerfTrace( &aTimer );
#endif
ENSURE_ARG_OR_THROW( xFont.is(),
"CanvasHelper::drawText(): font is NULL");
if( !mpVirtualDevice )
mpVirtualDevice = mpSurface->createVirtualDevice();
if( mpVirtualDevice )
{
DeviceSettingsGuard aGuard(mpVirtualDevice.get());
::Point aOutpos;
if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xFont ) )
return uno::Reference< rendering::XCachedPrimitive >(nullptr); // no output necessary
// change text direction and layout mode
ComplexTextLayoutFlags nLayoutMode(ComplexTextLayoutFlags::Default);
switch( textDirection )
{
case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
nLayoutMode |= ComplexTextLayoutFlags::BiDiStrong;
nLayoutMode |= ComplexTextLayoutFlags::TextOriginLeft;
break;
case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
nLayoutMode |= ComplexTextLayoutFlags::BiDiRtl;
[[fallthrough]];
case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
nLayoutMode |= ComplexTextLayoutFlags::BiDiRtl | ComplexTextLayoutFlags::BiDiStrong;
nLayoutMode |= ComplexTextLayoutFlags::TextOriginRight;
break;
}
// TODO(F2): alpha
mpVirtualDevice->SetLayoutMode( nLayoutMode );
rtl::Reference pTextLayout( new TextLayout(text, textDirection, 0, CanvasFont::Reference(dynamic_cast< CanvasFont* >( xFont.get() )), mpSurfaceProvider) );
pTextLayout->draw(*mpVirtualDevice, aOutpos, viewState, renderState);
}
return uno::Reference< rendering::XCachedPrimitive >(nullptr);
}
uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawTextLayout( const rendering::XCanvas* pOwner,
const uno::Reference< rendering::XTextLayout >& xLayoutedText,
const rendering::ViewState& viewState,
const rendering::RenderState& renderState )
{
ENSURE_ARG_OR_THROW( xLayoutedText.is(),
"CanvasHelper::drawTextLayout(): layout is NULL");
TextLayout* pTextLayout = dynamic_cast< TextLayout* >( xLayoutedText.get() );
if( pTextLayout )
{
if( !mpVirtualDevice )
mpVirtualDevice = mpSurface->createVirtualDevice();
if( mpVirtualDevice )
{
DeviceSettingsGuard aGuard(mpVirtualDevice.get());
// TODO(T3): Race condition. We're taking the font
// from xLayoutedText, and then calling draw() at it,
// without exclusive access. Move setupTextOutput(),
// e.g. to impltools?
::Point aOutpos;
if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xLayoutedText->getFont() ) )
return uno::Reference< rendering::XCachedPrimitive >(nullptr); // no output necessary
// TODO(F2): What about the offset scalings?
pTextLayout->draw(*mpVirtualDevice, aOutpos, viewState, renderState);
}
}
else
{
ENSURE_ARG_OR_THROW( false,
"CanvasHelper::drawTextLayout(): TextLayout not compatible with this canvas" );
}
return uno::Reference< rendering::XCachedPrimitive >(nullptr);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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