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#include <stdlib.h>
#include <string.h>
#include "plugin.h"
void perform_effect(_frame f, _args a)
{
byte pixelsize = f.pixelformat/8;
int x, y, pos, pos2, widthminuspos, widthminuspos2;
pixel8 *p, *tp=0;
char *t;
if(!a.s) return;
pos = atoi(a.s);
if(t = strstr(a.s, " "))
{
pos2 = atoi(t+1);
tp = (pixel8 *)malloc(f.width*pixelsize);
}
if(pos<0) pos=0;
if(pos>=f.width) pos=f.width-1;
if(pos2<0) pos2=0;
if(pos2>=f.width) pos2=f.width-1;
widthminuspos = f.width-pos;
widthminuspos2 = f.width-pos2;
for(y=0; y<f.height; y++)
{
p = scanline(f, y);
for(x=0; x<f.width; x++)
{
if(!tp)
// p[x] = x<pos||pos-(x-pos)<0 ? p[x] : p[pos-(x-pos)];
memcpy(&p[x*pixelsize],
x<pos||pos-(x-pos)<0 ? &p[x*pixelsize] : &p[(pos-(x-pos))*pixelsize],
pixelsize);
else
{
memcpy(&tp[x*pixelsize],
&p[x<pos ? ((int)(x/(float)pos*pos2))*pixelsize
: (pos2+(int)(((x-pos)/(float)widthminuspos*widthminuspos2)))*pixelsize],
pixelsize);
}
}
if(tp) memcpy(p, tp, f.width*pixelsize);
}
if(tp) free(tp);
}
void perform_copy(_frame f1, _frame f2, _args a)
{
byte pixelsize = f1.pixelformat/8;
int x, y, w, h, pos, pos2, widthminuspos, widthminuspos2, widthminusone;
pixel8 *p1, *p2, tp=0;
char *t;
if(!a.s) return;
pos = atoi(a.s);
if(t = strstr(a.s, " "))
{
pos2 = atoi(t+1);
tp = 1;
}
w = f1.width<f2.width ? f1.width : f2.width;
h = f1.height<f2.height ? f1.height : f2.height;
if(pos<0) pos=0;
if(pos>=w) pos=w-1;
if(pos2<0) pos2=0;
if(pos2>=w) pos2=w-1;
widthminuspos = f1.width-pos;
widthminuspos2 = f1.width-pos2;
widthminusone = w-1;
for(y=0; y<h; y++)
{
p1 = scanline(f1, y);
p2 = scanline(f2, y);
for(x=0; x<w; x++)
{
if(!tp)
memcpy(&p2[x*pixelsize],
x<pos||pos-(x-pos)<0 ? &p1[x*pixelsize] : &p1[(pos-(x-pos))*pixelsize],
pixelsize);
else
{
memcpy(&p2[x*pixelsize],
&p1[ x<pos ? ((int)(x/(float)pos*pos2))*pixelsize
: (pos2+(int)(((x-pos)/(float)widthminuspos*widthminuspos2)))*pixelsize],
pixelsize);
}
}
}
}
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