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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 <sal/log.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/utils/canvastools.hxx>
#include <rtl/math.hxx>
#include <tools/diagnose_ex.h>
#include <cairo.h>
#include <pixman.h>
#include "cairo_spritehelper.hxx"
using namespace ::cairo;
using namespace ::com::sun::star;
namespace cairocanvas
{
SpriteHelper::SpriteHelper() :
mbTextureDirty(true)
{}
void SpriteHelper::init( const geometry::RealSize2D& rSpriteSize,
const SpriteCanvasRef& rSpriteCanvas )
{
ENSURE_OR_THROW( rSpriteCanvas,
"SpriteHelper::init(): Invalid device, sprite canvas or surface" );
mpSpriteCanvas = rSpriteCanvas;
mbTextureDirty = true;
// also init base class
CanvasCustomSpriteHelper::init( rSpriteSize, rSpriteCanvas );
}
void SpriteHelper::setSurface( const SurfaceSharedPtr& pBufferSurface )
{
mpBufferSurface = pBufferSurface;
}
void SpriteHelper::disposing()
{
mpBufferSurface.reset();
mpSpriteCanvas.clear();
// forward to parent
CanvasCustomSpriteHelper::disposing();
}
void SpriteHelper::redraw( const CairoSharedPtr& pCairo,
const ::basegfx::B2DPoint& rPos,
bool& /*io_bSurfacesDirty*/,
bool /*bBufferedUpdate*/ ) const
{
#ifdef CAIRO_CANVAS_PERF_TRACE
struct timespec aTimer;
mxDevice->startPerfTrace( &aTimer );
#endif
const double fAlpha( getAlpha() );
const ::basegfx::B2DHomMatrix aTransform( getTransformation() );
if( !isActive() || ::basegfx::fTools::equalZero( fAlpha ) )
return;
SAL_INFO( "canvas.cairo", "CanvasCustomSprite::redraw called");
if( !pCairo )
return;
basegfx::B2DVector aSize = getSizePixel();
cairo_save( pCairo.get() );
double fX, fY;
fX = rPos.getX();
fY = rPos.getY();
if( !aTransform.isIdentity() )
{
cairo_matrix_t aMatrix, aInverseMatrix;
cairo_matrix_init( &aMatrix,
aTransform.get( 0, 0 ), aTransform.get( 1, 0 ), aTransform.get( 0, 1 ),
aTransform.get( 1, 1 ), aTransform.get( 0, 2 ), aTransform.get( 1, 2 ) );
aMatrix.x0 = basegfx::fround( aMatrix.x0 );
aMatrix.y0 = basegfx::fround( aMatrix.y0 );
cairo_matrix_init( &aInverseMatrix, aMatrix.xx, aMatrix.yx, aMatrix.xy, aMatrix.yy, aMatrix.x0, aMatrix.y0 );
cairo_matrix_invert( &aInverseMatrix );
cairo_matrix_transform_distance( &aInverseMatrix, &fX, &fY );
cairo_set_matrix( pCairo.get(), &aMatrix );
}
fX = basegfx::fround( fX );
fY = basegfx::fround( fY );
cairo_matrix_t aOrigMatrix;
cairo_get_matrix( pCairo.get(), &aOrigMatrix );
cairo_translate( pCairo.get(), fX, fY );
if( getClip().is() )
{
const uno::Reference<rendering::XPolyPolygon2D>& rClip( getClip() );
::basegfx::B2DPolyPolygon aClipPoly(
::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(
rClip ));
doPolyPolygonImplementation( aClipPoly, Clip, pCairo.get(),
nullptr, SurfaceProviderRef(mpSpriteCanvas),
rClip->getFillRule() );
}
SAL_INFO( "canvas.cairo","aSize " << aSize.getX() << " x " << aSize.getY() << " position: " << fX << "," << fY );
cairo_rectangle( pCairo.get(), 0, 0, floor( aSize.getX() ), floor( aSize.getY() ) );
cairo_clip( pCairo.get() );
cairo_set_matrix( pCairo.get(), &aOrigMatrix );
cairo_matrix_t aInverseMatrix = aOrigMatrix;
bool matrixProblem = false;
// tdf#125949: Cairo internally uses the pixman library, and _cairo_matrix_to_pixman_matrix()
// checks all matrix components to fix PIXMAN_MAX_INT, which is about 32k. Which means that
// if our transformation is large, such as an initial step of some zooming animations,
// the conversion will fail. To make things worse, once something in cairo fails, it's treated
// as a fatal error, the error status of that cairo_t gets set, and there's no way to reset it
// besides recreating the whole cairo_t
// (https://lists.cairographics.org/archives/cairo/2006-September/007892.html).
// So copy&paste PIXMAN_MAX_INT here, and if our matrix could fail, bail out.
#define PIXMAN_MAX_INT ((pixman_fixed_1 >> 1) - pixman_fixed_e) /* need to ensure deltas also fit */
if(cairo_matrix_invert(&aInverseMatrix) == CAIRO_STATUS_SUCCESS)
{
if(abs(aOrigMatrix.xx) > PIXMAN_MAX_INT || abs(aOrigMatrix.xx) > PIXMAN_MAX_INT
|| abs(aOrigMatrix.xy) > PIXMAN_MAX_INT || abs(aOrigMatrix.yx) > PIXMAN_MAX_INT
|| abs(aOrigMatrix.x0) > PIXMAN_MAX_INT || abs(aOrigMatrix.y0) > PIXMAN_MAX_INT
|| abs(aInverseMatrix.xx) > PIXMAN_MAX_INT || abs(aInverseMatrix.xx) > PIXMAN_MAX_INT
|| abs(aInverseMatrix.xy) > PIXMAN_MAX_INT || abs(aInverseMatrix.yx) > PIXMAN_MAX_INT
|| abs(aInverseMatrix.x0) > PIXMAN_MAX_INT || abs(aInverseMatrix.y0) > PIXMAN_MAX_INT)
matrixProblem = true;
#undef PIXMAN_MAX_INT
}
else
matrixProblem = true;
if(matrixProblem)
{
SAL_WARN( "canvas.cairo", "matrix would overflow PIXMAN_MAX_INT, avoiding drawing" );
cairo_restore( pCairo.get() );
return;
}
if( isContentFullyOpaque() )
cairo_set_operator( pCairo.get(), CAIRO_OPERATOR_SOURCE );
cairo_set_source_surface( pCairo.get(),
mpBufferSurface->getCairoSurface().get(),
fX, fY );
if( ::rtl::math::approxEqual( fAlpha, 1.0 ) )
cairo_paint( pCairo.get() );
else
cairo_paint_with_alpha( pCairo.get(), fAlpha );
cairo_restore( pCairo.get() );
#ifdef CAIRO_CANVAS_PERF_TRACE
mxDevice->stopPerfTrace( &aTimer, "sprite redraw" );
#endif
}
::basegfx::B2DPolyPolygon SpriteHelper::polyPolygonFromXPolyPolygon2D( uno::Reference< rendering::XPolyPolygon2D >& xPoly ) const
{
return ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(xPoly);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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