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Added 16-bit pixel support for some operations.

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This commit is contained in:
Jack Jansen 1996-01-22 14:55:15 +00:00
parent ba1de3bafb
commit 76c79e9ba8
1 changed files with 15 additions and 8 deletions
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23
Modules/imageop.c
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@ -32,6 +32,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#include "modsupport.h"
#define CHARP(cp, xmax, x, y) ((char *)(cp+y*xmax+x))
#define SHORTP(cp, xmax, x, y) ((short *)(cp+2*(y*xmax+x)))
#define LONGP(cp, xmax, x, y) ((long *)(cp+4*(y*xmax+x)))
static object *ImageopError;
@ -42,6 +43,7 @@ imageop_crop(self, args)
object *args;
{
char *cp, *ncp;
short *nsp;
long *nlp;
int len, size, x, y, newx1, newx2, newy1, newy2;
int ix, iy, xstep, ystep;
@ -51,8 +53,8 @@ imageop_crop(self, args)
&newx1, &newy1, &newx2, &newy2) )
return 0;
if ( size != 1 && size != 4 ) {
err_setstr(ImageopError, "Size should be 1 or 4");
if ( size != 1 && size != 2 && size != 4 ) {
err_setstr(ImageopError, "Size should be 1, 2 or 4");
return 0;
}
if ( len != size*x*y ) {
@ -67,6 +69,7 @@ imageop_crop(self, args)
if ( rv == 0 )
return 0;
ncp = (char *)getstringvalue(rv);
nsp = (short *)ncp;
nlp = (long *)ncp;
newy2 += ystep;
newx2 += xstep;
@ -76,8 +79,9 @@ imageop_crop(self, args)
if ( size == 1 ) *ncp++ = 0;
else *nlp++ = 0;
} else {
if ( size == 1 ) *ncp++ = *CHARP(cp, x, ix, iy);
else *nlp++ = *LONGP(cp, x, ix, iy);
if ( size == 1 ) *ncp++ = *CHARP(cp, x, ix, iy);
else if ( size == 2 ) *nsp++ = *SHORTP(cp, x, ix, iy);
else *nlp++ = *LONGP(cp, x, ix, iy);
}
}
}
@ -90,6 +94,7 @@ imageop_scale(self, args)
object *args;
{
char *cp, *ncp;
short *nsp;
long *nlp;
int len, size, x, y, newx, newy;
int ix, iy;
@ -99,8 +104,8 @@ imageop_scale(self, args)
if ( !getargs(args, "(s#iiiii)", &cp, &len, &size, &x, &y, &newx, &newy) )
return 0;
if ( size != 1 && size != 4 ) {
err_setstr(ImageopError, "Size should be 1 or 4");
if ( size != 1 && size != 2 && size != 4 ) {
err_setstr(ImageopError, "Size should be 1, 2 or 4");
return 0;
}
if ( len != size*x*y ) {
@ -112,13 +117,15 @@ imageop_scale(self, args)
if ( rv == 0 )
return 0;
ncp = (char *)getstringvalue(rv);
nsp = (short *)ncp;
nlp = (long *)ncp;
for( iy = 0; iy < newy; iy++ ) {
for ( ix = 0; ix < newx; ix++ ) {
oix = ix * x / newx;
oiy = iy * y / newy;
if ( size == 1 ) *ncp++ = *CHARP(cp, x, oix, oiy);
else *nlp++ = *LONGP(cp, x, oix, oiy);
if ( size == 1 ) *ncp++ = *CHARP(cp, x, oix, oiy);
else if ( size == 2 ) *nsp++ = *SHORTP(cp, x, oix, oiy);
else *nlp++ = *LONGP(cp, x, oix, oiy);
}
}
return rv;