/************************************************************************* * * $RCSfile: transparencygroupaction.cxx,v $ * * $Revision: 1.3 $ * * last change: $Author: vg $ $Date: 2005-03-10 13:27:00 $ * * The Contents of this file are made available subject to the terms of * either of the following licenses * * - GNU Lesser General Public License Version 2.1 * - Sun Industry Standards Source License Version 1.1 * * Sun Microsystems Inc., October, 2000 * * GNU Lesser General Public License Version 2.1 * ============================================= * Copyright 2000 by Sun Microsystems, Inc. * 901 San Antonio Road, Palo Alto, CA 94303, USA * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License version 2.1, as published by the Free Software Foundation. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * * * Sun Industry Standards Source License Version 1.1 * ================================================= * The contents of this file are subject to the Sun Industry Standards * Source License Version 1.1 (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.openoffice.org/license.html. * * Software provided under this License is provided on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS, * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING. * See the License for the specific provisions governing your rights and * obligations concerning the Software. * * The Initial Developer of the Original Code is: Sun Microsystems, Inc. * * Copyright: 2000 by Sun Microsystems, Inc. * * All Rights Reserved. * * Contributor(s): _______________________________________ * * ************************************************************************/ #ifndef _SV_GEN_HXX #include #endif #include #include #include #include #ifndef _RTL_LOGFILE_HXX_ #include #endif #ifndef _COM_SUN_STAR_RENDERING_XBITMAP_HPP__ #include #endif #ifndef INCLUDED_RTL_MATH_HXX #include #endif #ifndef _SV_BITMAPEX_HXX #include #endif #ifndef _VCL_CANVASTOOLS_HXX #include #endif #ifndef _SV_SVAPP_HXX #include #endif #ifndef _SV_OUTDEV_HXX #include #endif #ifndef _SV_VIRDEV_HXX #include #endif #ifndef _SV_VIRDEV_HXX #include #endif #ifndef _SV_GDIMTF_HXX #include #endif #ifndef _SV_GRADIENT_HXX #include #endif #ifndef _CANVAS_CANVASTOOLS_HXX #include #endif #ifndef _BGFX_NUMERIC_FTOOLS_HXX #include #endif #ifndef _BGFX_MATRIX_B2DHOMMATRIX_HXX #include #endif #ifndef _BGFX_TUPLE_B2DTUPLE_HXX #include #endif #ifndef _BGFX_TOOLS_CANVASTOOLS_HXX #include #endif #include #include using namespace ::com::sun::star; namespace cppcanvas { namespace internal { // free support functions // ====================== namespace { /** Setup transformation such that the next render call is moved rPoint away, and scaled according to the ratio given by src and dst size. */ void implSetupTransform( rendering::RenderState& rRenderState, const Point& rDstPoint ) { ::basegfx::B2DHomMatrix aLocalTransformation; aLocalTransformation.translate( rDstPoint.X(), rDstPoint.Y() ); ::canvas::tools::appendToRenderState( rRenderState, aLocalTransformation ); } } TransparencyGroupAction::TransparencyGroupAction( MtfAutoPtr& rGroupMtf, const Renderer::Parameters& rParms, const ::Point& rDstPoint, const ::Size& rDstSize, double nAlpha, const CanvasSharedPtr& rCanvas, const OutDevState& rState ) : mpGroupMtf( rGroupMtf ), mpAlphaGradient(), maParms( rParms ), maDstSize( rDstSize ), mxBufferBitmap(), maLastTransformation(), mpCanvas( rCanvas ), maState(), mnAlpha( nAlpha ) { tools::initRenderState(maState,rState); implSetupTransform( maState, rDstPoint ); } TransparencyGroupAction::TransparencyGroupAction( MtfAutoPtr& rGroupMtf, GradientAutoPtr& rAlphaGradient, const Renderer::Parameters& rParms, const ::Point& rDstPoint, const ::Size& rDstSize, const CanvasSharedPtr& rCanvas, const OutDevState& rState ) : mpGroupMtf( rGroupMtf ), mpAlphaGradient( rAlphaGradient ), maParms( rParms ), maDstSize( rDstSize ), mxBufferBitmap(), maLastTransformation(), mpCanvas( rCanvas ), maState(), mnAlpha( 1.0 ) { tools::initRenderState(maState,rState); implSetupTransform( maState, rDstPoint ); } TransparencyGroupAction::~TransparencyGroupAction() { // outline, because of incomplete types in header } // TODO(P3): The whole float transparency handling is a mess, // this should be refactored. What's more, the old idea of // having only internal 'metaactions', and not the original // GDIMetaFile now looks a lot less attractive. Try to move // into the direction of having a direct GDIMetaFile2XCanvas // renderer, and maybe a separate metafile XCanvas // implementation. bool TransparencyGroupAction::render( const ::basegfx::B2DHomMatrix& rTransformation ) const { RTL_LOGFILE_CONTEXT( aLog, "::cppcanvas::internal::TransparencyGroupAction::render()" ); RTL_LOGFILE_CONTEXT_TRACE1( aLog, "::cppcanvas::internal::TransparencyGroupAction: 0x%X", this ); // determine overall transformation matrix (render, view, // and passed transformation) ::basegfx::B2DHomMatrix aTransform; ::canvas::tools::getRenderStateTransform( aTransform, maState ); aTransform = rTransformation * aTransform; ::basegfx::B2DHomMatrix aTotalTransform; ::canvas::tools::getViewStateTransform( aTotalTransform, mpCanvas->getViewState() ); aTotalTransform = aTotalTransform * aTransform; // since pure translational changes to the transformation // does not matter, remove them before comparing aTotalTransform.set( 0, 2, 0.0 ); aTotalTransform.set( 1, 2, 0.0 ); // as soon as the total transformation changes, we've got // to re-render the bitmap if( aTotalTransform != maLastTransformation) { DBG_TESTSOLARMUTEX(); // determine total scaling factor of the // transformation matrix - need to make the bitmap // large enough ::basegfx::B2DTuple aScale; ::basegfx::B2DTuple aTranslate; double nRotate; double nShearX; if( !aTotalTransform.decompose( aScale, aTranslate, nRotate, nShearX ) ) { OSL_ENSURE( false, "TransparencyGroupAction::render(): non-decomposable transformation" ); return false; } ::Size aSize( ::basegfx::fround( aScale.getX() * maDstSize.Width() ), ::basegfx::fround( aScale.getY() * maDstSize.Height() ) ); // render our content into an appropriately sized // VirtualDevice with alpha channel VirtualDevice aVDev( *::Application::GetDefaultDevice(), 0, 0 ); aVDev.SetOutputSizePixel( aSize ); aVDev.SetMapMode(); ::Point aEmptyPoint; aVDev.DrawTransparent( *mpGroupMtf, aEmptyPoint, aSize, *mpAlphaGradient ); // update buffered bitmap and transformation BitmapSharedPtr aBmp( VCLFactory::getInstance().createBitmap( mpCanvas, aVDev.GetBitmapEx( aEmptyPoint, aSize ) ) ); mxBufferBitmap = aBmp->getUNOBitmap(); maLastTransformation = aTotalTransform; } // determine target transformation (we can't simply pass // aTotalTransform as assembled above, since we must take // the canvas' view state as is, it might contain clipping // (which, in turn, is relative to the view // transformation)) // given that aTotalTransform is the identity // transformation, we could simply render our bitmap // as-is. Now, since the mxBufferBitmap content already // accounts for scale changes in the overall // transformation, we must factor this out // before. Generally, the transformation matrix should be // structured like this: // Translation*Rotation*Shear*Scale. Thus, to neutralize // the contained scaling, we've got to right-multiply with // the inverse. ::basegfx::B2ISize aBmpSize( ::basegfx::unotools::b2ISizeFromIntegerSize2D( mxBufferBitmap->getSize() ) ); ::basegfx::B2DHomMatrix aScaleCorrection; aScaleCorrection.scale( (double)maDstSize.Width() / aBmpSize.getX(), (double)maDstSize.Height() / aBmpSize.getY() ); aTransform = aTransform * aScaleCorrection; rendering::RenderState aLocalState( maState ); ::canvas::tools::setRenderStateTransform(aLocalState, aTransform); if( ::rtl::math::approxEqual(mnAlpha, 1.0) ) { // no further alpha changes necessary -> draw directly mpCanvas->getUNOCanvas()->drawBitmap( mxBufferBitmap, mpCanvas->getViewState(), aLocalState ); } else { // add alpha modulation value to DeviceColor aLocalState.DeviceColor.realloc(4); aLocalState.DeviceColor[0] = 1.0; aLocalState.DeviceColor[1] = 1.0; aLocalState.DeviceColor[2] = 1.0; aLocalState.DeviceColor[3] = mnAlpha; mpCanvas->getUNOCanvas()->drawBitmapModulated( mxBufferBitmap, mpCanvas->getViewState(), aLocalState ); } return true; } } }