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#ifdef __cplusplus
extern "C" {
#endif
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "ppport.h"
#ifdef __cplusplus
}
#endif
#include "imext.h"
#include "imperl.h"
unsigned char
static
saturate(int in) {
if (in>255) { return 255; }
else if (in>0) return in;
return 0;
}
void
flines(i_img *im) {
i_color vl;
int x,y;
for(y = 0; y < im->ysize; y ++) {
for(x = 0; x < im->xsize; x ++ ) {
i_gpix(im,x,y,&vl);
if (!(y%2)) {
float yf = y/(float)im->ysize;
float mf = 1.2-0.8*yf;
vl.rgb.r = saturate(vl.rgb.r*mf);
vl.rgb.g = saturate(vl.rgb.g*mf);
vl.rgb.b = saturate(vl.rgb.b*mf);
} else {
float yf = (im->ysize-y)/(float)im->ysize;
float mf = 1.2-0.8*yf;
vl.rgb.r = saturate(vl.rgb.r*mf);
vl.rgb.g = saturate(vl.rgb.g*mf);
vl.rgb.b = saturate(vl.rgb.b*mf);
}
i_ppix(im,x,y,&vl);
}
}
}
DEFINE_IMAGER_CALLBACKS;
MODULE = Imager::Filter::Flines PACKAGE = Imager::Filter::Flines
PROTOTYPES: ENABLE
void
flines(im)
Imager::ImgRaw im
BOOT:
PERL_INITIALIZE_IMAGER_CALLBACKS;
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