sergiotarxz/libvips
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

more gtk-doc

Browse Source
This commit is contained in:
John Cupitt 2011-02-02 14:49:29 +00:00
parent afef89369b
commit 097eaedd69
2 changed files with 74 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

74
libvips/resample/im_affine.c
View File

@ -1,19 +1,5 @@
/* @(#) im_affine() ... affine transform with a supplied interpolator.
* @(#)
* @(#) int im_affinei(in, out, interpolate, a, b, c, d, dx, dy, w, h, x, y)
* @(#)
* @(#) IMAGE *in, *out;
* @(#) VipsInterpolate *interpolate;
* @(#) double a, b, c, d, dx, dy;
* @(#) int w, h, x, y;
* @(#)
* @(#) Forward transform
* @(#) X = a * x + b * y + dx
* @(#) Y = c * x + d * y + dy
* @(#)
* @(#) x and y are the coordinates in input image.
* @(#) X and Y are the coordinates in output image.
* @(#) (0,0) is the upper left corner.
/* im_affine() ... affine transform with a supplied interpolator.
*
*
* Copyright N. Dessipris
* Written on: 01/11/1991
@ -88,6 +74,8 @@
* 12/8/10
* - revise window_size / window_offset stuff again, see also
* interpolate.c
* 2/2/11
* - gtk-doc
*/
/*
@ -494,6 +482,41 @@ im__affinei( IMAGE *in, IMAGE *out,
return( 0 );
}
/**
* im_affinei:
* @in: input image
* @out: output image
* @interpolate: interpolation method
* @a: transformation matrix
* @b: transformation matrix
* @c: transformation matrix
* @d: transformation matrix
* @dx: output offset
* @dy: output offset
* @ox: output region
* @oy: output region
* @ow: output region
* @oh: output region
*
* This operator performs an affine transform on an image using @interpolate.
*
* The transform is:
*
* X = @a * x + @b * y + @dx
* Y = @c * x + @d * y + @dy
*
* x and y are the coordinates in input image.
* X and Y are the coordinates in output image.
* (0,0) is the upper left corner.
*
* The section of the output space defined by @ox, @oy, @ow, @oh is written to
* @out. See im_affinei_all() for a function which outputs all the transformed
* pixels.
*
* See also: im_affinei_all(), #VipsInterpolate.
*
* Returns: 0 on success, -1 on error
*/
int
im_affinei( IMAGE *in, IMAGE *out, VipsInterpolate *interpolate,
double a, double b, double c, double d, double dx, double dy,
@ -521,6 +544,25 @@ im_affinei( IMAGE *in, IMAGE *out, VipsInterpolate *interpolate,
return( im__affinei( in, out, interpolate, &trn ) );
}
/**
* im_affinei_all:
* @in: input image
* @out: output image
* @interpolate: interpolation method
* @a: transformation matrix
* @b: transformation matrix
* @c: transformation matrix
* @d: transformation matrix
* @dx: output offset
* @dy: output offset
*
* As im_affinei(), but the entire image is output.
*
* See also: im_affinei(), #VipsInterpolate.
*
* Returns: 0 on success, -1 on error
*/
int
im_affinei_all( IMAGE *in, IMAGE *out, VipsInterpolate *interpolate,
double a, double b, double c, double d, double dx, double dy )

16
libvips/resample/im_rightshift_size.c
View File

@ -100,6 +100,22 @@ GEN_FUNCS_SIGN( guint )
/** FUNCTION DEFINITIONS **/
/**
* im_rightshift_size:
* @in: input image
* @out: output image
* @xshift: horizontal shrink
* @yshift: vertical shrink
* @band_fmt: output format
*
* Shrink an image by a pair of power-of-two factors and shifting to give
* output of the specified band format. This is faster than im_shrink().
*
* See also: im_shrink(), im_affine().
*
* Returns: 0 on success, -1 on error
*/
int
im_rightshift_size( IMAGE *in, IMAGE *out, int xshift, int yshift, int band_fmt ){
#define FUNCTION_NAME "im_rightshift_size"