1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
#include <stdlib.h>
#include <string.h>
#include "plugin.h"
INFO("bend image horizontally or vertically")
void perform_effect(_frame f, _args a)
{
printf("NOTE: bend as effect does nothing. Use bend as copy operation.\n");
}
void perform_copy(_frame f1, _frame f2, _args a)
{
int x, y, w, h, pos, pos2, src, ysrc, ypos1, ypos2,
widthminuspos, widthminuspos2, widthminusone,
heightminusypos1, heightminusypos2;
pixel8 *p1, *p2, tp=0, tpy=0;
char *t;
byte pixelsize = f1.pixelformat/8;
if(!a.s) return;
pos = atoi(a.s);
if(t = strstr(a.s, " "))
{
pos2 = atoi(t+1);
tp = 1;
if(t = strstr(t+1, " "))
{
ypos1 = atoi(t+1);
if(t = strstr(t+1, " "))
{
ypos2 = atoi(t+1);
if(ypos1>0||ypos2>0) tpy = 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;
if(ypos1<0) ypos1=0;
if(ypos1>=w) ypos1=w-1;
if(ypos2<0) ypos2=0;
if(ypos2>=w) ypos2=w-1;
widthminuspos = f1.width-pos;
widthminuspos2 = f1.width-pos2;
widthminusone = w-1;
heightminusypos1 = f1.height-ypos1;
heightminusypos2 = f1.height-ypos2;
// here we'll avoid checking for pixelformat by taking the source and destination
// offsets as 8-bit, and multiplying that by pixelsize
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
{
src = x<pos ? x/(float)pos*pos2
: pos2+((x-pos)/(float)widthminuspos*widthminuspos2);
if(!tpy) {
memcpy(&p2[x*pixelsize], &p1[src*pixelsize], pixelsize);
} else {
ysrc = y<ypos1 ? y/(float)ypos1*ypos2
: ypos2+((y-ypos1)/(float)heightminusypos1*heightminusypos2);
memcpy(&p2[x*pixelsize], &scanline(f1, ysrc)[src*pixelsize],
pixelsize);
}
}
}
}
}
|
