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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 /canvas/source/cairo/cairo_canvashelper_text.cxx
parentInitial commit. (diff)
downloadlibreoffice-upstream.tar.xz
libreoffice-upstream.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 '')
-rw-r--r--canvas/source/cairo/cairo_canvashelper_text.cxx300
1 files changed, 300 insertions, 0 deletions
diff --git a/canvas/source/cairo/cairo_canvashelper_text.cxx b/canvas/source/cairo/cairo_canvashelper_text.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 <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_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( Degree10( ::basegfx::fround(-basegfx::rad2deg<10>(fmod(nRotate, 2*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 void
+ setupOutDevState( OutputDevice& rOutDev,
+ const rendering::XCanvas* pOwner,
+ const rendering::ViewState& viewState,
+ const rendering::RenderState& renderState )
+ {
+ ::canvas::tools::verifyInput( renderState,
+ __func__,
+ const_cast<rendering::XCanvas*>(pOwner), // only for refcount
+ 2,
+ 3 /* text */ );
+
+ // 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
+ aColor.SetAlpha(255);
+
+ rOutDev.SetTextColor( aColor );
+ }
+
+ namespace {
+
+ class DeviceSettingsGuard
+ {
+ private:
+ VclPtr<OutputDevice> mpVirtualDevice;
+ bool mbMappingWasEnabled;
+ public:
+ DeviceSettingsGuard(OutputDevice *pVirtualDevice)
+ : 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
+ vcl::text::ComplexTextLayoutFlags nLayoutMode(vcl::text::ComplexTextLayoutFlags::Default);
+ switch( textDirection )
+ {
+ case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
+ case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
+ nLayoutMode |= vcl::text::ComplexTextLayoutFlags::BiDiStrong;
+ nLayoutMode |= vcl::text::ComplexTextLayoutFlags::TextOriginLeft;
+ break;
+
+ case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
+ nLayoutMode |= vcl::text::ComplexTextLayoutFlags::BiDiRtl;
+ [[fallthrough]];
+ case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
+ nLayoutMode |= vcl::text::ComplexTextLayoutFlags::BiDiRtl | vcl::text::ComplexTextLayoutFlags::BiDiStrong;
+ nLayoutMode |= vcl::text::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: */