roo_display::PngImage Class Reference

Drawable PNG image backed by a multipass resource. More...

#include <png.h>

Inheritance diagram for roo_display::PngImage:

Collaboration diagram for roo_display::PngImage:

Public Member Functions
	PngImage (PngDecoder &decoder, roo_io::MultipassResource &resource)
	Create a PNG image using a decoder and resource.
Box	extents () const override
	Return the bounding box encompassing all pixels that need to be drawn.
Public Member Functions inherited from roo_display::Drawable
virtual	~Drawable ()
virtual Box	anchorExtents () const
	Return the bounds used for alignment.

Additional Inherited Members
Static Public Member Functions inherited from roo_display::Drawable
static const Drawable *	Empty ()
	A singleton representing a no-op drawable with no bounding box.

Detailed Description

Drawable PNG image backed by a multipass resource.

Definition at line 51 of file png.h.

Constructor & Destructor Documentation

PngImage()

roo_display::PngImage::PngImage ( PngDecoder &  decoder, roo_io::MultipassResource &  resource  )

inline

Create a PNG image using a decoder and resource.

Definition at line 54 of file png.h.

Member Function Documentation

extents()

Box roo_display::PngImage::extents ( ) const

inlineoverridevirtual

Return the bounding box encompassing all pixels that need to be drawn.

This method is called during a transaction and must not block or perform I/O.

Implements roo_display::Drawable.

Definition at line 59 of file png.h.

Referenced by roo_display::PngFile::extents().

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The documentation for this class was generated from the following file:

• temp_repos/roo_display/src/roo_display/image/png/png.h