Current File : //usr/share/man/man3mlib/mlib_ImageZoomTranslate_Fp.3mlib

'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc.  All Rights Reserved 
.TH mlib_ImageZoomTranslate_Fp 3MLIB "2 Mar 2007" "SunOS 5.11" "mediaLib Library Functions"
.SH NAME
mlib_ImageZoomTranslate_Fp \- zoom, with translation
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lmlib\fR [ \fIlibrary\fR... ]
#include <mlib.h>

\fBmlib_status\fR \fBmlib_ImageZoomTranslate_Fp\fR(\fBmlib_image *\fR\fIdst\fR, 
     \fBconst mlib_image *\fR\fIsrc\fR, \fBmlib_d64\fR \fIzoomx\fR, \fBmlib_d64\fR \fIzoomy\fR, 
     \fBmlib_d64\fR \fItx\fR, \fBmlib_d64\fR \fIty\fR, \fBmlib_filter\fR \fIfilter\fR, 
     \fBmlib_edge\fR \fIedge\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBmlib_ImageZoomTranslate_Fp()\fR function will enlarge or minify the floating-point source image by the X and Y zoom factors, with translation. It uses the interpolation method as described by the resampling filter.
.sp
.LP
It uses the following equation for coordinate mapping:
.sp
.in +2
.nf
xd = zoomx*xs + tx
yd = zoomy*ys + ty
.fi
.in -2

.sp
.LP
where a point with coordinates \fB(xs, ys)\fR in the source image is mapped to a point with coordinates \fB(xd, yd)\fR in the destination image.
.sp
.LP
The data type of the images can be \fBMLIB_FLOAT\fR or \fBMLIB_DOUBLE\fR.
.sp
.LP
The width and height of the destination image can be different from the width and height of the source image.
.sp
.LP
The center of the upper-left corner pixel of an image is located at \fB(0.5, 0.5)\fR.
.SH PARAMETERS
.sp
.LP
The function takes the following arguments:
.sp
.ne 2
.mk
.na
\fB\fIdst\fR\fR
.ad
.RS 10n
.rt  
Pointer to destination image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIsrc\fR\fR
.ad
.RS 10n
.rt  
Pointer to source image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIzoomx\fR\fR
.ad
.RS 10n
.rt  
X zoom factor. \fBzoomx > 0\fR.
.RE

.sp
.ne 2
.mk
.na
\fB\fIzoomy\fR\fR
.ad
.RS 10n
.rt  
Y zoom factor. \fBzoomy > 0\fR.
.RE

.sp
.ne 2
.mk
.na
\fB\fItx\fR\fR
.ad
.RS 10n
.rt  
X translation.
.RE

.sp
.ne 2
.mk
.na
\fB\fIty\fR\fR
.ad
.RS 10n
.rt  
Y translation.
.RE

.sp
.ne 2
.mk
.na
\fB\fIfilter\fR\fR
.ad
.RS 10n
.rt  
Type of resampling filter. It can be one of the following:
.sp
.in +2
.nf
MLIB_NEAREST
MLIB_BILINEAR
MLIB_BICUBIC
MLIB_BICUBIC2
.fi
.in -2

.RE

.sp
.ne 2
.mk
.na
\fB\fIedge\fR\fR
.ad
.RS 10n
.rt  
Type of edge condition. It can be one of the following:
.sp
.in +2
.nf
MLIB_EDGE_DST_NO_WRITE
MLIB_EDGE_DST_FILL_ZERO
MLIB_EDGE_OP_NEAREST
MLIB_EDGE_SRC_EXTEND
MLIB_EDGE_SRC_EXTEND_INDEF
MLIB_EDGE_SRC_PADDED
.fi
.in -2

.RE

.SH RETURN VALUES
.sp
.LP
The function returns \fBMLIB_SUCCESS\fR if successful. Otherwise it returns \fBMLIB_FAILURE\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBmlib_ImageZoomTranslate\fR(3MLIB), \fBmlib_ImageAffine\fR(3MLIB), \fBmlib_ImageAffine_Fp\fR(3MLIB), \fBattributes\fR(5)