typedef struct {
- unsigned long rgb; /* on screen */
+ Rgb rgb; /* on screen */
char c; /* canonical */
} CanonColourInfo;
#define CANONICALISE_IMAGE(im,w,h, COMPUTE_RGB) do{ \
/* compute_rgb should be a number of statements, or \
* a block, which assigns to \
- * unsigned long rgb; \
+ * Rgb rgb; \
* given the values of \
* int x,y; \
* all of which are anamorphic. Result is stored in im. \
* each pixel in reading order. \
*/ \
(im)= alloc_canon_image((w), (h)); \
+ (im)->rgb= alloc_rgb_image((w), (h)); \
\
int x,y; \
+ unsigned long last_rgb= ~0UL; \
+ int last_c= -1; \
for (y=0; y<(h); y++) { \
for (x=0; x<(w); x++) { \
const CanonColourInfo *cci; \
unsigned long rgb; \
COMPUTE_RGB; \
- for (cci=canoncolourinfos; cci->c; cci++) { \
- if (cci->rgb == rgb) { \
- (im)->d[y*(w) + x]= cci->c; \
- break; \
+ CANONIMG_ALSO_STORERGB((im)->rgb); \
+ if (rgb == last_rgb) { \
+ (im)->d[y*(w) + x]= last_c; \
+ } else { \
+ for (cci=canoncolourinfos; cci->c; cci++) { \
+ if (cci->rgb == rgb) { \
+ last_rgb= rgb; \
+ (im)->d[y*(w) + x]= last_c= cci->c; \
+ break; \
+ } \
} \
} \
} \
if (DEBUGP(rect)) { \
fprintf(debug, "%4d ",y); \
- fwrite(im->d + y*w, 1,w, debug); \
+ fwrite(im->d + y*(w), 1,(w), debug); \
fputc('\n',debug); \
} \
} \
#define CANONIMG_ALSO_STORERGB(ri) \
do{ \
- char *rip= RI_PIXEL((ri),x,y); \
+ unsigned char *rip= RI_PIXEL((ri),x,y); \
rip[0]= rgb >> 16; \
rip[1]= rgb >> 8; \
rip[2]= rgb; \