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add page (Kris Maglione)

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rsc 2007-03-26 20:55:26 +00:00
parent 6c4c5c5b95
commit 05a4d855f1
15 changed files with 448 additions and 480 deletions
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30
src/cmd/page/rotate.c
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@ -15,14 +15,14 @@
#include <libc.h>
#include <bio.h>
#include <draw.h>
#include <thread.h>
#include <cursor.h>
#include <event.h>
#include "page.h"
int ndraw = 0;
enum {
Xaxis = 0,
Yaxis = 1
Yaxis = 1,
};
Image *mtmp;
@ -55,7 +55,6 @@ moveup(Image *im, Image *tmp, int a, int b, int c, int axis)
drawop(tmp, tmp->r, im, nil, im->r.min, S);
switch(axis){
default:
case Xaxis:
range = Rect(a, im->r.min.y, c, im->r.max.y);
dr0 = range;
@ -67,6 +66,7 @@ moveup(Image *im, Image *tmp, int a, int b, int c, int axis)
p1 = Pt(a, im->r.min.y);
break;
case Yaxis:
default:
range = Rect(im->r.min.x, a, im->r.max.x, c);
dr0 = range;
dr0.max.y = dr0.min.y+(c-b);
@ -90,7 +90,6 @@ interlace(Image *im, Image *tmp, int axis, int n, Image *mask, int gran)
r0 = im->r;
r1 = im->r;
switch(axis) {
default:
case Xaxis:
r0.max.x = n;
r1.min.x = n;
@ -98,6 +97,7 @@ interlace(Image *im, Image *tmp, int axis, int n, Image *mask, int gran)
p1 = (Point){-gran, 0};
break;
case Yaxis:
default:
r0.max.y = n;
r1.min.y = n;
p0 = (Point){0, gran};
@ -132,12 +132,12 @@ interlace(Image *im, Image *tmp, int axis, int n, Image *mask, int gran)
int
nextmask(Image *mask, int axis, int maskdim)
{
Point delta;
Point o;
delta = axis==Xaxis ? Pt(maskdim,0) : Pt(0,maskdim);
o = axis==Xaxis ? Pt(maskdim,0) : Pt(0,maskdim);
drawop(mtmp, mtmp->r, mask, nil, mask->r.min, S);
gendrawop(mask, mask->r, mtmp, delta, mtmp, divpt(delta,-2), S);
/* writefile("mask", mask, maskdim/2); */
gendrawop(mask, mask->r, mtmp, o, mtmp, divpt(o,-2), S);
// writefile("mask", mask, maskdim/2);
return maskdim/2;
}
@ -153,13 +153,13 @@ shuffle(Image *im, Image *tmp, int axis, int n, Image *mask, int gran,
nn = n - left;
interlace(im, tmp, axis, nn, mask, gran);
/* writefile("interlace", im, gran); */
// writefile("interlace", im, gran);
gran = nextmask(mask, axis, gran);
shuffle(im, tmp, axis, n, mask, gran, nn);
/* writefile("shuffle", im, gran); */
// writefile("shuffle", im, gran);
moveup(im, tmp, lastnn, nn, n, axis);
/* writefile("move", im, gran); */
// writefile("move", im, gran);
}
void
@ -198,7 +198,7 @@ rot180(Image *im)
}
rmask.max.x = gran;
drawop(mask, rmask, display->opaque, nil, ZP, S);
/* writefile("mask", mask, gran); */
// writefile("mask", mask, gran);
shuffle(im, tmp, Xaxis, Dx(im->r), mask, gran, 0);
freeimage(mask);
freeimage(mtmp);
@ -309,11 +309,11 @@ i0(double x)
}
double
kaiser(double x, double tau, double alpha)
kaiser(double x, double t, double a)
{
if(fabs(x) > tau)
if(fabs(x) > t)
return 0.;
return i0(alpha*sqrt(1-(x*x/(tau*tau))))/i0(alpha);
return i0(a*sqrt(1-(x*x/(t*t))))/i0(a);
}