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| -rw-r--r-- | canvas/source/vcl/impltools.cxx | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/canvas/source/vcl/impltools.cxx b/canvas/source/vcl/impltools.cxx new file mode 100644 index 000000000..754a34ce0 --- /dev/null +++ b/canvas/source/vcl/impltools.cxx @@ -0,0 +1,221 @@ +/* -*- 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 <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/numeric/ftools.hxx> +#include <basegfx/point/b2dpoint.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <basegfx/range/b2drectangle.hxx> +#include <basegfx/utils/canvastools.hxx> +#include <basegfx/tuple/b2dtuple.hxx> +#include <rtl/math.hxx> +#include <tools/diagnose_ex.h> +#include <sal/log.hxx> +#include <vcl/bitmapex.hxx> +#include <vcl/canvastools.hxx> +#include <vcl/BitmapTools.hxx> +#include <vcl/metric.hxx> + +#include <canvas/canvastools.hxx> + +#include "canvasbitmap.hxx" +#include "impltools.hxx" +#include "spritecanvas.hxx" + + +using namespace ::com::sun::star; + +namespace vclcanvas::tools +{ + ::BitmapEx bitmapExFromXBitmap( const uno::Reference< rendering::XBitmap >& xBitmap ) + { + // TODO(F3): CanvasCustomSprite should also be tunnelled + // through (also implements XIntegerBitmap interface) + CanvasBitmap* pBitmapImpl = dynamic_cast< CanvasBitmap* >( xBitmap.get() ); + + if( pBitmapImpl ) + { + return pBitmapImpl->getBitmap(); + } + else + { + SpriteCanvas* pCanvasImpl = dynamic_cast< SpriteCanvas* >( xBitmap.get() ); + if( pCanvasImpl && pCanvasImpl->getBackBuffer() ) + { + // TODO(F3): mind the plain Canvas impl. Consolidate with CWS canvas05 + const ::OutputDevice& rDev( pCanvasImpl->getBackBuffer()->getOutDev() ); + const ::Point aEmptyPoint; + return rDev.GetBitmapEx( aEmptyPoint, + rDev.GetOutputSizePixel() ); + } + + // TODO(F2): add support for floating point bitmap formats + uno::Reference< rendering::XIntegerReadOnlyBitmap > xIntBmp( + xBitmap, uno::UNO_QUERY_THROW ); + + ::BitmapEx aBmpEx = vcl::unotools::bitmapExFromXBitmap( xIntBmp ); + if( !!aBmpEx ) + return aBmpEx; + + // TODO(F1): extract pixel from XBitmap interface + ENSURE_OR_THROW( false, + "bitmapExFromXBitmap(): could not extract bitmap" ); + } + + return ::BitmapEx(); + } + + bool setupFontTransform( ::Point& o_rPoint, + vcl::Font& io_rVCLFont, + const rendering::ViewState& rViewState, + const rendering::RenderState& rRenderState, + ::OutputDevice const & rOutDev ) + { + ::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; + } + + bool isRectangle( const ::tools::PolyPolygon& rPolyPoly ) + { + // exclude some cheap cases first + if( rPolyPoly.Count() != 1 ) + return false; + + const ::tools::Polygon& rPoly( rPolyPoly[0] ); + + sal_uInt16 nCount( rPoly.GetSize() ); + if( nCount < 4 ) + return false; + + // delegate to basegfx + return ::basegfx::utils::isRectangle( rPoly.getB2DPolygon() ); + } + + + // VCL-Canvas related + + + ::Point mapRealPoint2D( const geometry::RealPoint2D& rPoint, + const rendering::ViewState& rViewState, + const rendering::RenderState& rRenderState ) + { + ::basegfx::B2DPoint aPoint( ::basegfx::unotools::b2DPointFromRealPoint2D(rPoint) ); + + ::basegfx::B2DHomMatrix aMatrix; + aPoint *= ::canvas::tools::mergeViewAndRenderTransform(aMatrix, + rViewState, + rRenderState); + + return vcl::unotools::pointFromB2DPoint( aPoint ); + } + + ::tools::PolyPolygon mapPolyPolygon( const ::basegfx::B2DPolyPolygon& rPoly, + const rendering::ViewState& rViewState, + const rendering::RenderState& rRenderState ) + { + ::basegfx::B2DHomMatrix aMatrix; + ::canvas::tools::mergeViewAndRenderTransform(aMatrix, + rViewState, + rRenderState); + + ::basegfx::B2DPolyPolygon aTemp( rPoly ); + + aTemp.transform( aMatrix ); + + return ::tools::PolyPolygon( aTemp ); + } + + ::BitmapEx transformBitmap( const BitmapEx& rBitmap, + const ::basegfx::B2DHomMatrix& rTransform ) + { + SAL_INFO( "canvas.vcl", "::vclcanvas::tools::transformBitmap()" ); + SAL_INFO( "canvas.vcl", "::vclcanvas::tools::transformBitmap: 0x" << std::hex << &rBitmap ); + + // calc transformation and size of bitmap to be + // generated. Note, that the translational components are + // deleted from the transformation; this can be handled by + // an offset when painting the bitmap + const Size aBmpSize( rBitmap.GetSizePixel() ); + ::basegfx::B2DRectangle aDestRect; + + // calc effective transformation for bitmap + const ::basegfx::B2DRectangle aSrcRect( 0, 0, + aBmpSize.Width(), + aBmpSize.Height() ); + ::canvas::tools::calcTransformedRectBounds( aDestRect, + aSrcRect, + rTransform ); + + // re-center bitmap, such that it's left, top border is + // aligned with (0,0). The method takes the given + // rectangle, and calculates a transformation that maps + // this rectangle unscaled to the origin. + ::basegfx::B2DHomMatrix aLocalTransform; + ::canvas::tools::calcRectToOriginTransform( aLocalTransform, + aSrcRect, + rTransform ); + + return vcl::bitmap::CanvasTransformBitmap(rBitmap, rTransform, aDestRect, aLocalTransform); + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |