Files
libreoffice/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx
Tor Lillqvist 66aed6f470 New try to sort out the overloaded virtual method weirdness
Revert "Clang WaE: -Woverloaded-virtual weirdness, this seems to help"
as that broke tinderboxes. Try another way instead, renaming two
versions of the overloaded render() method, so that there is no longer
any overloading.

Compiles -Werror-clean with Clang, hopefully no problem with other
compilers either.

This reverts commit 86b99ab408.
2012-04-04 08:27:23 +03:00

575 lines
27 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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#include <tools/gen.hxx>
#include <canvas/debug.hxx>
#include <canvas/verbosetrace.hxx>
#include <canvas/canvastools.hxx>
#include <rtl/logfile.hxx>
#include <com/sun/star/rendering/XBitmap.hpp>
#include <com/sun/star/rendering/XCanvas.hpp>
#include <rtl/math.hxx>
#include <vcl/metaact.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/canvastools.hxx>
#include <vcl/svapp.hxx>
#include <vcl/outdev.hxx>
#include <vcl/virdev.hxx>
#include <vcl/gdimtf.hxx>
#include <vcl/gradient.hxx>
#include <basegfx/range/b2drange.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/vector/b2dsize.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/tuple/b2dtuple.hxx>
#include <basegfx/tools/canvastools.hxx>
#include <boost/utility.hpp>
#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 renderSubset( 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 );
}
SAL_WNODEPRECATED_DECLARATIONS_PUSH
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;
}
SAL_WNODEPRECATED_DECLARATIONS_POP
SAL_WNODEPRECATED_DECLARATIONS_PUSH
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;
}
SAL_WNODEPRECATED_DECLARATIONS_POP
// 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::renderSubset( const ::basegfx::B2DHomMatrix& rTransformation,
const Subset& rSubset ) const
{
RTL_LOGFILE_CONTEXT( aLog, "::cppcanvas::internal::TransparencyGroupAction::renderSubset()" );
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 );
// 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::renderSubset(): non-decomposable transformation" );
return false;
}
// 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();
// 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<sal_Int32>( aScale.getX() * maDstSize.getX() )+1,
static_cast<sal_Int32>( 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::B2DHomMatrix aScaleCorrection;
aScaleCorrection.scale( 1/aScale.getX(), 1/aScale.getY() );
aTransform = aTransform * aScaleCorrection;
rendering::RenderState aLocalState( maState );
::canvas::tools::setRenderStateTransform(aLocalState, aTransform);
#if OSL_DEBUG_LEVEL > 2
aLocalState.Clip.clear();
aLocalState.DeviceColor =
::vcl::unotools::colorToDoubleSequence(
::Color( 0x80FF0000 ),
mpCanvas->getUNOCanvas()->getDevice()->getDeviceColorSpace() );
if( maState.Clip.is() )
mpCanvas->getUNOCanvas()->fillPolyPolygon( maState.Clip,
mpCanvas->getViewState(),
aLocalState );
aLocalState.DeviceColor = maState.DeviceColor;
#endif
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<rendering::ARGBColor> 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 renderSubset( 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;
}
}
SAL_WNODEPRECATED_DECLARATIONS_PUSH
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 ) );
}
SAL_WNODEPRECATED_DECLARATIONS_POP
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */