office-gobmx/include/drawinglayer/primitive2d/transparenceprimitive2d.hxx
Noel Grandin 8104d771b1 tdf#144052 reduce Primitive2D copying
when creating charts, by using a
    Primitive2DContainer&&
parameter in the GroupPrimitive2D constructor, which forces the call
sites to pass a temporary, and at most call sites, we can std::move in
an existing local variable.

Change-Id: I531970918800c6832ab606b5a4ff5fd2d47ccf5b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/121844
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
2021-09-09 15:22:52 +02:00

80 lines
3.3 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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* This file incorporates work covered by the following license notice:
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#pragma once
#include <drawinglayer/drawinglayerdllapi.h>
#include <drawinglayer/primitive2d/groupprimitive2d.hxx>
namespace drawinglayer::primitive2d
{
/** TransparencePrimitive2D class
This is the basic primitive for applying freely defined transparence
to freely defined content. The basic idea is to associate a content
which is defined as a sequence of primitives and hold as child content
in the GroupPrimitive2D with a transparence channel also defined as a sequence
of primitives and hold in the transparence member.
The basic definition is to use the transparence content as transparence-Mask by
interpreting the transparence-content not as RGB, but as Luminance transparence mask
using the common RGB_to_luminance definition as e.g. used by VCL.
The defining geometry is the Range of the child primitive sequence,
this means the renderers will/shall use this geometric information for
rendering, not the transparent one. The transparent one should/will be clipped
accordingly.
*/
class DRAWINGLAYER_DLLPUBLIC TransparencePrimitive2D final : public GroupPrimitive2D
{
private:
/// The transparence-Mask who's RGB-Values are interpreted as Luminance
Primitive2DContainer maTransparence;
public:
/** constructor
@param rChildren
The content which is defined to have a transparency. The
range of this primitive is defined by this content
@param rTransparence
The definition of the Transparence-channel for this primitive. It
will be interpreted as mask by interpreting as gray values
using the common RGB_to_luminance definitions
*/
TransparencePrimitive2D(
Primitive2DContainer&& rChildren,
Primitive2DContainer&& aTransparence);
/// data read access
const Primitive2DContainer& getTransparence() const { return maTransparence; }
/// compare operator
virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
/// provide unique ID
virtual sal_uInt32 getPrimitive2DID() const override;
};
} // end of namespace drawinglayer::primitive2d
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */