}
}
-ibbox_t*get_bitmap_bboxes_simple(unsigned char*alpha, int width, int height)
+ibbox_t*get_bitmap_bboxes_simple(unsigned char*alpha, int width, int height, int rowsize)
{
int ymin = -1;
int ymax = -1;
int x,y;
for(y=0;y<height;y++) {
- unsigned char*a = &alpha[y*width];
+ unsigned char*a = &alpha[y*rowsize];
for(x=0;x<width;x++) {
if(a[x]) break;
}
typedef struct _context {
void**group;
unsigned char*alpha;
+ int rowsize;
int width;
int height;
head_t*heads;
}
}
+ibbox_t ibbox_clip(ibbox_t* outer, ibbox_t* inner)
+{
+ ibbox_t i = {inner->xmin, inner->ymin, inner->xmax, inner->ymax, 0};
+ if(i.xmax > outer->xmax) i.xmax = outer->xmax;
+ if(i.ymax > outer->ymax) i.ymax = outer->ymax;
+ if(i.xmax < outer->xmin) i.xmax = outer->xmin;
+ if(i.ymax < outer->ymin) i.ymax = outer->ymin;
+
+ if(i.xmin > outer->xmax) i.xmin = outer->xmax;
+ if(i.ymin > outer->ymax) i.ymin = outer->ymax;
+ if(i.xmin < outer->xmin) i.xmin = outer->xmin;
+ if(i.ymin < outer->ymin) i.ymin = outer->ymin;
+ return i;
+}
+
static void** annotate(context_t*context)
{
unsigned char*alpha = context->alpha;
}
}
int pos = 0;
+ int apos = 0;
for(y=1;y<height;y++) {
pos += width;
- if(alpha[pos]) {
+ apos += context->rowsize;
+ if(alpha[apos]) {
if(group[pos-width])
link_to(context,pos,pos-width);
else
/* once this code is stable we should copy&paste it
out of the loop, change the loop end to width-1 and
add the pos-width+1 case */
- if(alpha[pos+x]) {
+ if(alpha[apos+x]) {
if(group[pos+x-width]) {
link_to(context,pos+x,pos+x-width);
if(group[pos+x-1])
}
}
-ibbox_t*get_bitmap_bboxes(unsigned char*alpha, int width, int height)
+ibbox_t*get_bitmap_bboxes(unsigned char*alpha, int width, int height, int rowsize)
{
int size = width*height;
if(width<=1 || height<=1)
- return get_bitmap_bboxes_simple(alpha, width, height);
+ return get_bitmap_bboxes_simple(alpha, width, height, rowsize);
context_t context;
context.alpha = alpha;
+ context.rowsize = rowsize;
context.width = width;
context.height = height;
context.heads = 0;
"\1\0\0\0\0\0\1\0"
"\1\1\1\0\0\0\0\0";
- get_bitmap_bboxes(alpha, 8,8);
+ get_bitmap_bboxes(alpha, 8,8, 8);
}
#endif