diff options
Diffstat (limited to 'Modules/imageop.c')
| -rw-r--r-- | Modules/imageop.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/Modules/imageop.c b/Modules/imageop.c index 49301b7..67aa9fc 100644 --- a/Modules/imageop.c +++ b/Modules/imageop.c @@ -513,6 +513,158 @@ imageop_grey42grey(self, args) return rv; } +static object * +imageop_rgb2rgb8(self, args) + object *self; + object *args; +{ + int x, y, len, nlen; + unsigned long *cp; + unsigned char *ncp; + object *rv; + int i, r, g, b; + unsigned long value, nvalue; + + if ( !getargs(args, "(s#ii)", &cp, &len, &x, &y) ) + return 0; + + nlen = x*y; + if ( nlen*4 != len ) { + err_setstr(ImageopError, "String has incorrect length"); + return 0; + } + + rv = newsizedstringobject(NULL, nlen); + if ( rv == 0 ) + return 0; + ncp = (unsigned char *)getstringvalue(rv); + + for ( i=0; i < nlen; i++ ) { + /* Bits in source: aaaaaaaa BBbbbbbb GGGggggg RRRrrrrr */ + value = *cp++; + r = (value >> 5) & 7; + g = (value >> 13) & 7; + b = (value >> 22) & 3; + nvalue = (r<<5) | (b<<3) | g; + *ncp++ = nvalue; + } + return rv; +} + +static object * +imageop_rgb82rgb(self, args) + object *self; + object *args; +{ + int x, y, len, nlen; + unsigned char *cp; + unsigned long *ncp; + object *rv; + int i, r, g, b; + unsigned long value, nvalue; + + if ( !getargs(args, "(s#ii)", &cp, &len, &x, &y) ) + return 0; + + nlen = x*y; + if ( nlen != len ) { + err_setstr(ImageopError, "String has incorrect length"); + return 0; + } + + rv = newsizedstringobject(NULL, nlen*4); + if ( rv == 0 ) + return 0; + ncp = (unsigned long *)getstringvalue(rv); + + for ( i=0; i < nlen; i++ ) { + /* Bits in source: RRRBBGGG + ** Red and Green are multiplied by 36.5, Blue by 85 + */ + value = *cp++; + r = (value >> 5) & 7; + g = (value ) & 7; + b = (value >> 3) & 3; + r = (r<<5) | (r<<3) | (r>>1); + g = (g<<5) | (g<<3) | (g>>1); + b = (b<<6) | (b<<4) | (b<<2) | b; + nvalue = r | (g<<8) | (b<<16); + *ncp++ = nvalue; + } + return rv; +} + +static object * +imageop_rgb2grey(self, args) + object *self; + object *args; +{ + int x, y, len, nlen; + unsigned long *cp; + unsigned char *ncp; + object *rv; + int i, r, g, b; + unsigned long value, nvalue; + + if ( !getargs(args, "(s#ii)", &cp, &len, &x, &y) ) + return 0; + + nlen = x*y; + if ( nlen*4 != len ) { + err_setstr(ImageopError, "String has incorrect length"); + return 0; + } + + rv = newsizedstringobject(NULL, nlen); + if ( rv == 0 ) + return 0; + ncp = (unsigned char *)getstringvalue(rv); + + for ( i=0; i < nlen; i++ ) { + value = *cp++; + r = (value ) & 0xff; + g = (value >> 8) & 0xff; + b = (value >> 16) & 0xff; + nvalue = (int)(0.30*r + 0.59*g + 0.11*b); + if ( nvalue > 255 ) nvalue = 255; + *ncp++ = nvalue; + } + return rv; +} + +static object * +imageop_grey2rgb(self, args) + object *self; + object *args; +{ + int x, y, len, nlen; + unsigned char *cp; + unsigned long *ncp; + object *rv; + int i; + unsigned long value; + + if ( !getargs(args, "(s#ii)", &cp, &len, &x, &y) ) + return 0; + + nlen = x*y; + if ( nlen != len ) { + err_setstr(ImageopError, "String has incorrect length"); + return 0; + } + + rv = newsizedstringobject(NULL, nlen*4); + if ( rv == 0 ) + return 0; + ncp = (unsigned long *)getstringvalue(rv); + + for ( i=0; i < nlen; i++ ) { + value = *cp++; + *ncp++ = value | (value << 8 ) | (value << 16); + } + return rv; +} + /* static object * imageop_mul(self, args) @@ -560,6 +712,10 @@ static struct methodlist imageop_methods[] = { { "grey22grey", imageop_grey22grey }, { "grey42grey", imageop_grey42grey }, { "tovideo", imageop_tovideo }, + { "rgb2rgb8", imageop_rgb2rgb8 }, + { "rgb82rgb", imageop_rgb82rgb }, + { "rgb2grey", imageop_rgb2grey }, + { "grey2rgb", imageop_grey2rgb }, { 0, 0 } }; |