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/* sequence.c: routines to make a sequence of digital image warp frames
//
// Written and Copyright (C) 1994-1997 by Michael J. Gourlay
//
// PROVIDED AS IS. NO WARRANTEES, EXPRESS OR IMPLIED.
//
// These routines are used for the X Window System only and are not
// needed for tkmorph.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Xaw/Scrollbar.h>
#include "diw_map.h"
#include "mjg_dialog.h"
#include "warp.h"
#include "mesh.h"
#include "RgbaImage.h"
#include "image_diw.h"
#include "sequence.h"
#include "my_malloc.h"
/* ---------------------------------------------------------------------- */
static char *sequence_file_name = NULL;
static int sequence_num_frames = 30;
/* ---------------------------------------------------------------------- */
#define SHARPNESS 2.0
static double
sigmoid_func(double x)
{
register double as;
as=atan(SHARPNESS);
return((atan((x-0.5)*SHARPNESS*2.0)+as)/(2.0*as));
}
/* ---------------------------------------------------------------------- */
static double
linear_func(double x)
{
return(x);
}
/* ---------------------------------------------------------------------- */
void
warp_rgba_image(RgbaImageT *inP, RgbaImageT *outP, double *sxP, double *syP, double *dxP, double *dyP, int nx, int ny)
{
warp_image(inP->ri,outP->ri, inP->ncols,inP->nrows, sxP,syP, dxP,dyP, nx,ny);
warp_image(inP->gi,outP->gi, inP->ncols,inP->nrows, sxP,syP, dxP,dyP, nx,ny);
warp_image(inP->bi,outP->bi, inP->ncols,inP->nrows, sxP,syP, dxP,dyP, nx,ny);
warp_image(inP->ai,outP->ai, inP->ncols,inP->nrows, sxP,syP, dxP,dyP, nx,ny);
}
void
warp_sequence(diw_map_t *dmP, int steps, char *basename, int show)
{
float x; /* frame "time" parameter: between 0 and 1 */
float dissolve_t; /* adjuested "time" parameter for dissolve */
float warp_t; /* adjusted "time" parameter for warp */
MeshT tween_mesh;
int frame;
char iname[255];
if(basename==NULL)
basename="warp";
if(meshAlloc(&tween_mesh, dmP->mesh_src.nx, dmP->mesh_src.ny))
return;
if(steps<0)
steps=0;
for(frame=0; frame<steps; frame++) {
x = (double)frame / (steps-1);
dissolve_t = sigmoid_func(x);
warp_t = linear_func(x);
if(show) {
/* Update the GUI controls for dissolve and warp */
/* Remember the user-set value */
float dt = dmP->img_t;
float wt = dmP->mesh_t;
dmP->img_t = dissolve_t;
dmP->mesh_t = warp_t;
XawScrollbarSetThumb(dmP->dissolve_sb, dissolve_t, -1.0);
XawScrollbarSetThumb(dmP->warp_sb, warp_t, -1.0);
WarpImage(dmP->widget, NULL, NULL, NULL);
/* Restore the user-set values */
dmP->img_t = dt;
dmP->mesh_t = wt;
} else {
meshInterpolate(&tween_mesh, &dmP->mesh_src, &dmP->mesh_dst, warp_t);
warp_rgba_image(&orig_image[0], &dmP->src_img, dmP->mesh_src.x, dmP->mesh_src.y, tween_mesh.x, tween_mesh.y, tween_mesh.nx, tween_mesh.ny);
warp_rgba_image(&orig_image[1], &dmP->dst_img, dmP->mesh_dst.x, dmP->mesh_dst.y, tween_mesh.x, tween_mesh.y, tween_mesh.nx, tween_mesh.ny);
}
sprintf(iname, "%s%04i", basename, frame);
rgbaImageWrite(iname, &dmP->src_img, &dmP->dst_img, dissolve_t);
}
/* meshFree added -- WA (MJG 13sep95) */
meshFree(&tween_mesh);
}
/* =============================================================== */
/* Callbacks */
/* --------------------------------------------------------------- */
/*ARGSUSED*/
void
set_sequence_file_name_cb(Widget widget, XtPointer client_data, XtPointer call_data)
{
dialog_apdx_t *daP = (dialog_apdx_t *)call_data;
char *fn;
fn = XawDialogGetValueString(daP->dialog);
if(fn==NULL) {
return;
} else {
if(sequence_file_name != NULL) {
FREE(sequence_file_name);
}
sequence_file_name = strdup(fn);
}
}
/* --------------------------------------------------------------- */
/*ARGSUSED*/
void
set_sequence_num_frames_cb(Widget widget, XtPointer client_data, XtPointer call_data)
{
dialog_apdx_t *daP = (dialog_apdx_t *)call_data;
char *nf;
nf = XawDialogGetValueString(daP->dialog);
if(nf==NULL) {
return;
} else {
sequence_num_frames = atoi(nf);
}
}
/* --------------------------------------------------------------- */
/*ARGSUSED*/
void
warp_sequence_cb(Widget widget, XtPointer client_data, XtPointer call_data)
{
warp_sequence(&global_diw_map[0], sequence_num_frames, sequence_file_name, True);
}
/* =============================================================== */
/* Actions */
/* --------------------------------------------------------------- */
/* WarpSequence: action to generate a warp sequence
*/
/*ARGSUSED*/
void
WarpSequence(Widget widget, XEvent *evt, String *prms, Cardinal *n_prms)
{
diw_map_t *diw_mapP;
if((diw_mapP = diw_map_of_widget(widget)) == NULL) {
fprintf(stderr, "WarpSequence: Bad Widget for diw_map\n");
return;
}
warp_sequence(diw_mapP, sequence_num_frames, sequence_file_name, True);
}
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