diff options
Diffstat (limited to 'pkg/images/tv/tvmark/mkmag.x')
| -rw-r--r-- | pkg/images/tv/tvmark/mkmag.x | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/pkg/images/tv/tvmark/mkmag.x b/pkg/images/tv/tvmark/mkmag.x new file mode 100644 index 00000000..956f50b4 --- /dev/null +++ b/pkg/images/tv/tvmark/mkmag.x @@ -0,0 +1,20 @@ +include <imhdr.h> + +# MK_MAG -- Procedure to compute the x and y magnification factors. + +procedure mk_mag (im, iw, xmag, ymag) + +pointer im # pointer to the frame buffer +pointer iw # pointer to the wcs structure +real xmag, ymag # x and y magnifications + +real xll, yll, xur, yur + +begin + # Compute the x and y magnification. + call iw_fb2im (iw, 1.0, 1.0, xll, yll) + call iw_fb2im (iw, real (IM_LEN(im,1)), real (IM_LEN(im,2)), xur, yur) + + xmag = abs (xur - xll) / (IM_LEN(im,1) - 1) + ymag = abs (yur - yll) / (IM_LEN(im,2) - 1) +end |