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See the * GNU Lesser General Public License version 3 for more details * (a copy is included in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU Lesser General Public License * version 3 along with OpenOffice.org. If not, see * * for a copy of the LGPLv3 License. * ************************************************************************/ // MARKER(update_precomp.py): autogen include statement, do not remove #include "precompiled_cppcanvas.hxx" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "transparencygroupaction.hxx" #include "outdevstate.hxx" #include "mtftools.hxx" #include "cppcanvas/vclfactory.hxx" using namespace ::com::sun::star; namespace cppcanvas { namespace internal { // free support functions // ====================== namespace { class TransparencyGroupAction : public Action, private ::boost::noncopyable { public: /** Create new transparency group action. @param rGroupMtf Metafile that groups all actions to be rendered transparent @param rParms Render parameters @param rDstPoint Left, top edge of destination, in current state coordinate system @param rDstSize Size of the transparency group object, in current state coordinate system. @param nAlpha Alpha value, must be in the range [0,1] */ TransparencyGroupAction( MtfAutoPtr& rGroupMtf, const Renderer::Parameters& rParms, const ::basegfx::B2DPoint& rDstPoint, const ::basegfx::B2DVector& rDstSize, double nAlpha, const CanvasSharedPtr& rCanvas, const OutDevState& rState ); /** Create new transparency group action. @param rGroupMtf Metafile that groups all actions to be rendered transparent. @param rAlphaGradient VCL gradient, to be rendered into the action's alpha channel. @param rParms Render parameters @param rDstPoint Left, top edge of destination, in current state coordinate system @param rDstSize Size of the transparency group object, in current state coordinate system. */ TransparencyGroupAction( MtfAutoPtr& rGroupMtf, GradientAutoPtr& rAlphaGradient, const Renderer::Parameters& rParms, const ::basegfx::B2DPoint& rDstPoint, const ::basegfx::B2DVector& rDstSize, const CanvasSharedPtr& rCanvas, const OutDevState& rState ); virtual bool render( const ::basegfx::B2DHomMatrix& rTransformation ) const; virtual bool render( const ::basegfx::B2DHomMatrix& rTransformation, const Subset& rSubset ) const; virtual ::basegfx::B2DRange getBounds( const ::basegfx::B2DHomMatrix& rTransformation ) const; virtual ::basegfx::B2DRange getBounds( const ::basegfx::B2DHomMatrix& rTransformation, const Subset& rSubset ) const; virtual sal_Int32 getActionCount() const; private: MtfAutoPtr mpGroupMtf; GradientAutoPtr mpAlphaGradient; const Renderer::Parameters maParms; const ::basegfx::B2DSize maDstSize; mutable uno::Reference< rendering::XBitmap > mxBufferBitmap; // contains last rendered version mutable ::basegfx::B2DHomMatrix maLastTransformation; // contains last active transformation mutable Subset maLastSubset; // contains last effective subset // transformation for // mxBufferBitmap content CanvasSharedPtr mpCanvas; rendering::RenderState maState; const double mnAlpha; }; /** 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 ::basegfx::B2DPoint& rDstPoint ) { ::basegfx::B2DHomMatrix aLocalTransformation; aLocalTransformation.translate( rDstPoint.getX(), rDstPoint.getY() ); ::canvas::tools::appendToRenderState( rRenderState, aLocalTransformation ); } TransparencyGroupAction::TransparencyGroupAction( MtfAutoPtr& rGroupMtf, const Renderer::Parameters& rParms, const ::basegfx::B2DPoint& rDstPoint, const ::basegfx::B2DVector& 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 ); // correct clip (which is relative to original transform) tools::modifyClip( maState, rState, rCanvas, rDstPoint, NULL, NULL ); maLastSubset.mnSubsetBegin = 0; maLastSubset.mnSubsetEnd = -1; } TransparencyGroupAction::TransparencyGroupAction( MtfAutoPtr& rGroupMtf, GradientAutoPtr& rAlphaGradient, const Renderer::Parameters& rParms, const ::basegfx::B2DPoint& rDstPoint, const ::basegfx::B2DVector& 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 ); // correct clip (which is relative to original transform) tools::modifyClip( maState, rState, rCanvas, rDstPoint, NULL, NULL ); maLastSubset.mnSubsetBegin = 0; maLastSubset.mnSubsetEnd = -1; } // 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 Subset& rSubset ) 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 ); // if there's no buffer bitmap, or as soon as the // total transformation changes, we've got to // re-render the bitmap if( !mxBufferBitmap.is() || aTotalTransform != maLastTransformation || rSubset.mnSubsetBegin != maLastSubset.mnSubsetBegin || rSubset.mnSubsetEnd != maLastSubset.mnSubsetEnd ) { 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_FAIL( "TransparencyGroupAction::render(): non-decomposable transformation" ); return false; } // output size of metafile ::Size aOutputSizePixel( ::basegfx::fround( aScale.getX() * maDstSize.getX() ), ::basegfx::fround( aScale.getY() * maDstSize.getY() ) ); // pixel size of cache bitmap: round up to nearest int ::Size aBitmapSizePixel( static_cast( aScale.getX() * maDstSize.getX() )+1, static_cast( aScale.getY() * maDstSize.getY() )+1 ); ::Point aEmptyPoint; // render our content into an appropriately sized // VirtualDevice with alpha channel VirtualDevice aVDev( *::Application::GetDefaultDevice(), 0, 0 ); aVDev.SetOutputSizePixel( aBitmapSizePixel ); aVDev.SetMapMode(); if( rSubset.mnSubsetBegin != 0 || rSubset.mnSubsetEnd != -1 ) { // true subset - extract referenced // metaactions from mpGroupMtf GDIMetaFile aMtf; MetaAction* pCurrAct; int nCurrActionIndex; // extract subset actions for( nCurrActionIndex=0, pCurrAct=mpGroupMtf->FirstAction(); pCurrAct; ++nCurrActionIndex, pCurrAct = mpGroupMtf->NextAction() ) { switch( pCurrAct->GetType() ) { case META_PUSH_ACTION: case META_POP_ACTION: case META_CLIPREGION_ACTION: case META_ISECTRECTCLIPREGION_ACTION: case META_ISECTREGIONCLIPREGION_ACTION: case META_MOVECLIPREGION_ACTION: case META_LINECOLOR_ACTION: case META_FILLCOLOR_ACTION: case META_TEXTCOLOR_ACTION: case META_TEXTFILLCOLOR_ACTION: case META_TEXTLINECOLOR_ACTION: case META_TEXTALIGN_ACTION: case META_FONT_ACTION: case META_RASTEROP_ACTION: case META_REFPOINT_ACTION: case META_LAYOUTMODE_ACTION: // state-changing action - copy as-is aMtf.AddAction( pCurrAct->Clone() ); break; case META_GRADIENT_ACTION: case META_HATCH_ACTION: case META_EPS_ACTION: case META_COMMENT_ACTION: case META_POINT_ACTION: case META_PIXEL_ACTION: case META_LINE_ACTION: case META_RECT_ACTION: case META_ROUNDRECT_ACTION: case META_ELLIPSE_ACTION: case META_ARC_ACTION: case META_PIE_ACTION: case META_CHORD_ACTION: case META_POLYLINE_ACTION: case META_POLYGON_ACTION: case META_POLYPOLYGON_ACTION: case META_BMP_ACTION: case META_BMPSCALE_ACTION: case META_BMPSCALEPART_ACTION: case META_BMPEX_ACTION: case META_BMPEXSCALE_ACTION: case META_BMPEXSCALEPART_ACTION: case META_MASK_ACTION: case META_MASKSCALE_ACTION: case META_MASKSCALEPART_ACTION: case META_GRADIENTEX_ACTION: case META_WALLPAPER_ACTION: case META_TRANSPARENT_ACTION: case META_FLOATTRANSPARENT_ACTION: case META_TEXT_ACTION: case META_TEXTARRAY_ACTION: case META_TEXTLINE_ACTION: case META_TEXTRECT_ACTION: case META_STRETCHTEXT_ACTION: case META_RENDERGRAPHIC_ACTION: // output-generating action - only // copy, if we're within the // requested subset if( rSubset.mnSubsetBegin <= nCurrActionIndex && rSubset.mnSubsetEnd > nCurrActionIndex ) { aMtf.AddAction( pCurrAct->Clone() ); } break; default: OSL_FAIL( "Unknown meta action type encountered" ); break; } } aVDev.DrawTransparent( aMtf, aEmptyPoint, aOutputSizePixel, *mpAlphaGradient ); } else { // no subsetting - render whole mtf aVDev.DrawTransparent( *mpGroupMtf, aEmptyPoint, aOutputSizePixel, *mpAlphaGradient ); } // update buffered bitmap and transformation BitmapSharedPtr aBmp( VCLFactory::getInstance().createBitmap( mpCanvas, aVDev.GetBitmapEx( aEmptyPoint, aBitmapSizePixel ) ) ); mxBufferBitmap = aBmp->getUNOBitmap(); maLastTransformation = aTotalTransform; maLastSubset = rSubset; } // 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.getX() / aBmpSize.getX(), (double)maDstSize.getY() / 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 uno::Sequence aCols(1); aCols[0] = rendering::ARGBColor( mnAlpha, 1.0, 1.0, 1.0); aLocalState.DeviceColor = mpCanvas->getUNOCanvas()->getDevice()->getDeviceColorSpace()->convertFromARGB( aCols); mpCanvas->getUNOCanvas()->drawBitmapModulated( mxBufferBitmap, mpCanvas->getViewState(), aLocalState ); } return true; } // 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 { Subset aSubset; aSubset.mnSubsetBegin = 0; aSubset.mnSubsetEnd = -1; return render( rTransformation, aSubset ); } ::basegfx::B2DRange TransparencyGroupAction::getBounds( const ::basegfx::B2DHomMatrix& rTransformation ) const { rendering::RenderState aLocalState( maState ); ::canvas::tools::prependToRenderState(aLocalState, rTransformation); return tools::calcDevicePixelBounds( ::basegfx::B2DRange( 0,0, maDstSize.getX(), maDstSize.getY() ), mpCanvas->getViewState(), aLocalState ); } ::basegfx::B2DRange TransparencyGroupAction::getBounds( const ::basegfx::B2DHomMatrix& rTransformation, const Subset& rSubset ) const { // TODO(F3): Currently, the bounds for // TransparencyGroupAction subsets equal those of the // full set, although this action is able to render // true subsets. // polygon only contains a single action, empty bounds // if subset requests different range if( rSubset.mnSubsetBegin != 0 || rSubset.mnSubsetEnd != 1 ) return ::basegfx::B2DRange(); return getBounds( rTransformation ); } sal_Int32 TransparencyGroupAction::getActionCount() const { return mpGroupMtf.get() ? mpGroupMtf->GetActionSize() : 0; } } ActionSharedPtr TransparencyGroupActionFactory::createTransparencyGroupAction( MtfAutoPtr& rGroupMtf, const Renderer::Parameters& rParms, const ::basegfx::B2DPoint& rDstPoint, const ::basegfx::B2DVector& rDstSize, double nAlpha, const CanvasSharedPtr& rCanvas, const OutDevState& rState ) { return ActionSharedPtr( new TransparencyGroupAction(rGroupMtf, rParms, rDstPoint, rDstSize, nAlpha, rCanvas, rState ) ); } ActionSharedPtr TransparencyGroupActionFactory::createTransparencyGroupAction( MtfAutoPtr& rGroupMtf, GradientAutoPtr& rAlphaGradient, const Renderer::Parameters& rParms, const ::basegfx::B2DPoint& rDstPoint, const ::basegfx::B2DVector& rDstSize, const CanvasSharedPtr& rCanvas, const OutDevState& rState ) { return ActionSharedPtr( new TransparencyGroupAction(rGroupMtf, rAlphaGradient, rParms, rDstPoint, rDstSize, rCanvas, rState ) ); } } } /* vim:set shiftwidth=4 softtabstop=4 expandtab: */