transform

transform

Synopsis

                    VipsTransformation;
int                 vips__affine                        (VipsImage *in,
                                                         VipsImage *out,
                                                         VipsTransformation *trn);
int                 vips__transform_add                 (const VipsTransformation *in1,
                                                         const VipsTransformation *in2,
                                                         VipsTransformation *out);
int                 vips__transform_calc_inverse        (VipsTransformation *trn);
void                vips__transform_forward_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_init                (VipsTransformation *trn);
void                vips__transform_invert_point        (const VipsTransformation *trn,
                                                         const double x,
                                                         const double y,
                                                         double *ox,
                                                         double *oy);
void                vips__transform_invert_rect         (const VipsTransformation *trn,
                                                         const VipsRect *in,
                                                         VipsRect *out);
int                 vips__transform_isidentity          (const VipsTransformation *trn);
void                vips__transform_print               (const VipsTransformation *trn);
void                vips__transform_set_area            (VipsTransformation *Param1);

Description

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__affine ()

int                 vips__affine                        (VipsImage *in,
                                                         VipsImage *out,
                                                         VipsTransformation *trn);


vips__transform_add ()

int                 vips__transform_add                 (const VipsTransformation *in1,
                                                         const VipsTransformation *in2,
                                                         VipsTransformation *out);


vips__transform_calc_inverse ()

int                 vips__transform_calc_inverse        (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_forward_rect ()

void                vips__transform_forward_rect        (const VipsTransformation *trn,
                                                         const VipsRect *in,
                                                         VipsRect *out);


vips__transform_init ()

void                vips__transform_init                (VipsTransformation *trn);


vips__transform_invert_point ()

void                vips__transform_invert_point        (const VipsTransformation *trn,
                                                         const double x,
                                                         const double y,
                                                         double *ox,
                                                         double *oy);


vips__transform_invert_rect ()

void                vips__transform_invert_rect         (const VipsTransformation *trn,
                                                         const VipsRect *in,
                                                         VipsRect *out);


vips__transform_isidentity ()

int                 vips__transform_isidentity          (const VipsTransformation *trn);


vips__transform_print ()

void                vips__transform_print               (const VipsTransformation *trn);


vips__transform_set_area ()

void                vips__transform_set_area            (VipsTransformation *Param1);