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Diffstat (limited to 'canvas/source/cairo/cairo_spritehelper.cxx')
| -rw-r--r-- | canvas/source/cairo/cairo_spritehelper.cxx | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/canvas/source/cairo/cairo_spritehelper.cxx b/canvas/source/cairo/cairo_spritehelper.cxx new file mode 100644 index 000000000..b3806f0e9 --- /dev/null +++ b/canvas/source/cairo/cairo_spritehelper.cxx @@ -0,0 +1,195 @@ +/* -*- 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: */ |