diff options
Diffstat (limited to 'Modules/imgfile.c')
| -rw-r--r-- | Modules/imgfile.c | 64 |
1 files changed, 58 insertions, 6 deletions
diff --git a/Modules/imgfile.c b/Modules/imgfile.c index 93f5ef3..e57d6c4 100644 --- a/Modules/imgfile.c +++ b/Modules/imgfile.c @@ -43,6 +43,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. static object * ImgfileError; /* Exception we raise for various trouble */ +static int top_to_bottom; /* True if we want top-to-bottom images */ /* The image library does not always call the error hander :-(, therefore we have a global variable indicating that it was called. @@ -86,6 +87,20 @@ imgfile_open(fname) return image; } +static object * +imgfile_ttob(self, args) + object *self; + object *args; +{ + int newval; + object *rv; + + if (!getargs(args, "i", &newval)) + return NULL; + rv = newintobject(top_to_bottom); + top_to_bottom = newval; + return rv; +} static object * imgfile_read(self, args) @@ -100,7 +115,8 @@ imgfile_read(self, args) static short rs[8192], gs[8192], bs[8192]; int x, y; IMAGE *image; - + int yfirst, ylast, ystep; + if ( !getargs(args, "s", &fname) ) return NULL; @@ -139,7 +155,17 @@ imgfile_read(self, args) } cdatap = getstringvalue(rv); idatap = (long *)cdatap; - for ( y=0; y < ysize && !error_called; y++ ) { + + if (top_to_bottom) { + yfirst = ysize-1; + ylast = -1; + ystep = -1; + } else { + yfirst = 0; + ylast = ysize; + ystep = 1; + } + for ( y=yfirst; y != ylast && !error_called; y += ystep ) { if ( zsize == 1 ) { getrow(image, rs, y, 0); for(x=0; x<xsize; x++ ) @@ -164,14 +190,17 @@ imgfile_read(self, args) static IMAGE *glob_image; static long *glob_datap; -static int glob_width, glob_z; +static int glob_width, glob_z, glob_ysize; static xs_get(buf, y) short *buf; int y; { - getrow(glob_image, buf, y, glob_z); + if (top_to_bottom) + getrow(glob_image, buf, (glob_ysize-1-y), glob_z); + else + getrow(glob_image, buf, y, glob_z); } static @@ -221,6 +250,7 @@ xscale(image, xsize, ysize, zsize, datap, xnew, ynew, fmode, blur) glob_image = image; glob_datap = datap; glob_width = xnew; + glob_ysize = ysize; if ( zsize == 1 ) { glob_z = 0; filterzoom(xs_get, xs_put_c, xsize, ysize, xnew, ynew, fmode, blur); @@ -255,6 +285,7 @@ imgfile_readscaled(self, args) double blur; int extended; int fmode; + int yfirst, ylast, ystep; /* ** Parse args. Funny, since arg 4 and 5 are optional @@ -331,7 +362,16 @@ imgfile_readscaled(self, args) if ( extended ) { xscale(image, xsize, ysize, zsize, idatap, xwtd, ywtd, fmode, blur); } else { - for ( y=0; y < ywtd && !error_called; y++ ) { + if (top_to_bottom) { + yfirst = ywtd-1; + ylast = -1; + ystep = -1; + } else { + yfirst = 0; + ylast = ywtd; + ystep = 1; + } + for ( y=yfirst; y != ylast && !error_called; y += ystep ) { yorig = (int)(y*yfac); if ( zsize == 1 ) { getrow(image, rs, yorig, 0); @@ -392,6 +432,8 @@ imgfile_write(self, args) short r, g, b; long rgb; int x, y; + int yfirst, ylast, ystep; + if ( !getargs(args, "(ss#iii)", &fname, &cdatap, &len, &xsize, &ysize, &zsize) ) @@ -425,7 +467,16 @@ imgfile_write(self, args) idatap = (long *)cdatap; - for( y=0; y<ysize && !error_called; y++ ) { + if (top_to_bottom) { + yfirst = ysize-1; + ylast = -1; + ystep = -1; + } else { + yfirst = 0; + ylast = ysize; + ystep = 1; + } + for ( y=yfirst; y != ylast && !error_called; y += ystep ) { if ( zsize == 1 ) { for( x=0; x<xsize; x++ ) rs[x] = *cdatap++; @@ -459,6 +510,7 @@ static struct methodlist imgfile_methods[] = { { "read", imgfile_read }, { "readscaled", imgfile_readscaled, 1}, { "write", imgfile_write }, + { "ttob", imgfile_ttob }, { NULL, NULL } /* Sentinel */ }; |