Synopsis
VipsTransformation;
void vips__transform_init (VipsTransformation *trn);
int vips__transform_calc_inverse (VipsTransformation *trn);
int vips__transform_isidentity (const VipsTransformation *trn);
int vips__transform_add (const VipsTransformation *in1,
const VipsTransformation *in2,
VipsTransformation *out);
void vips__transform_print (const VipsTransformation *trn);
void vips__transform_forward_point (const VipsTransformation *trn,
const double x,
const double y,
double *ox,
double *oy);
void vips__transform_invert_point (const VipsTransformation *trn,
const double x,
const double y,
double *ox,
double *oy);
void vips__transform_forward_rect (const VipsTransformation *trn,
const VipsRect *in,
VipsRect *out);
void vips__transform_invert_rect (const VipsTransformation *trn,
const VipsRect *in,
VipsRect *out);
void vips__transform_set_area (VipsTransformation *Param1);
int vips__affine (VipsImage *in,
VipsImage *out,
VipsTransformation *trn);
Details
VipsTransformation
typedef struct {
/* Area of input we can use. This can be smaller than the real input
* image: we expand the input to add extra pixels for interpolation.
*/
VipsRect iarea;
/* The area of the output we've been asked to generate. left/top can
* be negative.
*/
VipsRect oarea;
/* The transform.
*/
double a, b, c, d;
double idx, idy;
double odx, ody;
double ia, ib, ic, id; /* Inverse of matrix abcd */
} VipsTransformation;
vips__transform_calc_inverse ()
int vips__transform_calc_inverse (VipsTransformation *trn);
vips__transform_isidentity ()
int vips__transform_isidentity (const VipsTransformation *trn);
vips__transform_forward_point ()
void vips__transform_forward_point (const VipsTransformation *trn,
const double x,
const double y,
double *ox,
double *oy);
vips__transform_invert_point ()
void vips__transform_invert_point (const VipsTransformation *trn,
const double x,
const double y,
double *ox,
double *oy);
