Functions for blending images. More...

Macros
#define	WLZ_FAST_CODE

#define	restrict

Functions
WlzErrorNum	WlzImageBlendObjToBufRGBA (WlzUByte buffer, WlzObject obj, WlzIVertex2 bufOrg, WlzIVertex2 bufSz, WlzUInt useAlpha, WlzUInt color)
	Blends the given 2D object's domain into the given buffer using Porter Duff source over destination. Object values are ignored. More...

Detailed Description

Functions for blending images.

Author: Bill Hill

Date: December 2016

Version

Id: bda3e08f2bfc2632220f7627778de987bdd1aa44

: Address: MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, EH4 2XU, UK.

: Copyright (C), [2016], The University Court of the University of Edinburgh, Old College, Edinburgh, UK.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Macro Definition Documentation

◆ WLZ_FAST_CODE

#define WLZ_FAST_CODE

◆ restrict

#define restrict

Function Documentation

◆ WlzImageBlendObjToBufRGBA()

WlzErrorNum WlzImageBlendObjToBufRGBA	(	WlzUByte *	buffer,
		WlzObject *	obj,
		WlzIVertex2	bufOrg,
		WlzIVertex2	bufSz,
		WlzUInt	useAlpha,
		WlzUInt	color
	)

Blends the given 2D object's domain into the given buffer using Porter Duff source over destination. Object values are ignored.

Returns: Woolz error code.

Parameters

buffer	Given buffer with either 3 or (when alpha is used) 4 bytes per pixel.
obj	Given object to blend into the buffer.
bufOrg	Position of the buffer origin.
bufSz	Size of the buffer.
useAlpha	Use alpha channel if non-zero.
color	Colour to blend within the object's domain.

References _WlzIntervalWSpace::lftpos, _WlzIntervalWSpace::linpos, _WlzIntervalWSpace::rgtpos, _WlzObject::type, _WlzIVertex2::vtX, _WlzIVertex2::vtY, WLZ_2D_DOMAINOBJ, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_PROPERTY_NULL, WLZ_RASTERDIR_ILIC, WlzInitRasterScan(), and WlzNextInterval().