office-gobmx/drawinglayer/source/primitive2d/fillgraphicprimitive2d.cxx
Armin Le Grand (Collabora) 462d85709e CairoSDPR: Support alpha for BitmapPrimitives
To more directly support an additional alpha channel
for BitmapPrimitive data I have done some deeper
changes to the primitive stack, in a compatible
way. Quite some more graphic types and primitives
now support an additional direct alpha value. All
that is decomposed/created/broken down in a way
that needs no changes for existing renderers, in
already described ways.
The CairoPixelProcessor2D already uses this in the
processFillGraphicPrimitive2D implementation and
thus in the FillGraphicPrimitive2D. This works since
primitive productions now all try to create that
FillGraphicPrimitive2D type including an additional
alpha value - if possible and necessary.

Change-Id: Ib1b16491a2b3aee16f14cc8196e28af30a7cf9be
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170900
Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>
Tested-by: Jenkins
2024-07-23 18:35:26 +02:00

142 lines
5.4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include <drawinglayer/primitive2d/fillgraphicprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <texture/texture.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
#include <drawinglayer/primitive2d/graphicprimitivehelper2d.hxx>
#include <utility>
#include <vcl/graph.hxx>
using namespace com::sun::star;
namespace drawinglayer::primitive2d
{
Primitive2DReference FillGraphicPrimitive2D::create2DDecomposition(const geometry::ViewInformation2D& /*rViewInformation*/) const
{
const attribute::FillGraphicAttribute& rAttribute = getFillGraphic();
if(rAttribute.isDefault())
return nullptr;
const Graphic& rGraphic = rAttribute.getGraphic();
if(GraphicType::Bitmap != rGraphic.GetType() && GraphicType::GdiMetafile != rGraphic.GetType())
return nullptr;
const Size aSize(rGraphic.GetPrefSize());
if(!(aSize.Width() && aSize.Height()))
return nullptr;
// we have a graphic (bitmap or metafile) with some size
Primitive2DContainer aContainer;
if(rAttribute.getTiling())
{
// get object range and create tiling matrices
std::vector< basegfx::B2DHomMatrix > aMatrices;
texture::GeoTexSvxTiled aTiling(
rAttribute.getGraphicRange(),
rAttribute.getOffsetX(),
rAttribute.getOffsetY());
// get matrices and realloc retval
aTiling.appendTransformations(aMatrices);
// prepare content primitive
Primitive2DContainer xSeq;
create2DDecompositionOfGraphic(xSeq,
rGraphic,
basegfx::B2DHomMatrix(),
getTransparency());
rtl::Reference<GroupPrimitive2D> xGroup = new GroupPrimitive2D(std::move(xSeq));
for(const auto &a : aMatrices)
{
aContainer.push_back(new TransformPrimitive2D(
getTransformation() * a,
*xGroup));
}
}
else
{
// add graphic without tiling
const basegfx::B2DHomMatrix aObjectTransform(
getTransformation() * basegfx::utils::createScaleTranslateB2DHomMatrix(
rAttribute.getGraphicRange().getRange(),
rAttribute.getGraphicRange().getMinimum()));
create2DDecompositionOfGraphic(aContainer,
rGraphic,
aObjectTransform,
getTransparency());
}
return new GroupPrimitive2D(std::move(aContainer));
}
FillGraphicPrimitive2D::FillGraphicPrimitive2D(
basegfx::B2DHomMatrix aTransformation,
const attribute::FillGraphicAttribute& rFillGraphic,
double fTransparency)
: maTransformation(std::move(aTransformation))
, maFillGraphic(rFillGraphic)
, maOffsetXYCreatedBitmap()
, mfTransparency(std::max(0.0, std::min(1.0, fTransparency)))
{
}
bool FillGraphicPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
{
if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
{
const FillGraphicPrimitive2D& rCompare = static_cast< const FillGraphicPrimitive2D& >(rPrimitive);
return (getTransformation() == rCompare.getTransformation()
&& getFillGraphic() == rCompare.getFillGraphic()
&& basegfx::fTools::equal(getTransparency(), rCompare.getTransparency()));
}
return false;
}
basegfx::B2DRange FillGraphicPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation*/) const
{
// return range of it
basegfx::B2DPolygon aPolygon(basegfx::utils::createUnitPolygon());
aPolygon.transform(getTransformation());
return basegfx::utils::getRange(aPolygon);
}
// provide unique ID
sal_uInt32 FillGraphicPrimitive2D::getPrimitive2DID() const
{
return PRIMITIVE2D_ID_FILLGRAPHICPRIMITIVE2D;
}
} // end of namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */