-static void find_table_entry(Rect commod, int colno, Rect *cellr) {
- cellr->tl.y= commod.tl.y;
- cellr->br.y= commod.br.y;
- cellr->tl.x= !colno ? commod.tl.x : colrightx[colno-1]+2;
- cellr->br.x= colrightx[colno];
- debug_rect("cell", colno, *cellr);
- require_rectangle_r(*cellr, " o", __LINE__);
+static void find_table_entry(Rect commod, int colno, Rect *cell) {
+ cell->tl.y= commod.tl.y;
+ cell->br.y= commod.br.y;
+ cell->tl.x= !colno ? commod.tl.x : colrightx[colno-1]+2;
+ cell->br.x= colrightx[colno];
+ debug_rect("cell", colno, *cell);
+
+ const RgbImage *ri= cim->rgb;
+
+ Rgb background;
+ unsigned char chanbg[3];
+ long bg_count=0, light_count=0, dark_count=0;
+ Point p;
+
+ background= ri_rgb(ri, cell->br.x, cell->br.y);
+ memcpy(chanbg, RI_PIXEL(ri, cell->br.x, cell->br.y), 3);
+
+ FOR_P_RECT(p,*cell) {
+ const unsigned char *here_pixel= RI_PIXEL(ri, p.x, p.y);
+ int i;
+ for (i=0; i<3; i++) {
+ unsigned here= here_pixel[i];
+ if (here == chanbg[i]) bg_count++;
+ else if (here < chanbg[i]) dark_count += (chanbg[i] - here)/4 + 1;
+ else if (here > chanbg[i]) light_count += (here - chanbg[i])/4 + 1;
+ }
+ }
+ long total_count= RECT_W(*cell) * RECT_H(*cell) * 3;
+
+ MUST( bg_count > total_count / 2,
+ MR(*cell);MIL(total_count);MIL(bg_count);
+ MIL(light_count);MIL(dark_count) );
+
+ if (bg_count == total_count)
+ return;
+
+ Rgb foreground;
+ double fg_extra;
+
+ if (light_count/16 > dark_count) {
+ foreground= 0xffffffU;
+ fg_extra= +1;
+ } else if (dark_count/16 > light_count) {
+ foreground= 0;
+ fg_extra= -1;
+ } else {
+ MUST( !"tell light from dark",
+ MR(*cell);MIL(total_count);MIL(bg_count);
+ MIL(light_count);MIL(dark_count);MRGB(background); );
+ }
+
+ debugf("TABLEENTRY col=%d %d,%d..%d,%d bg=%ld light=%ld dark=%ld\n",
+ colno, cell->tl.x,cell->tl.y, cell->br.x,cell->br.y,
+ bg_count, light_count, dark_count);
+
+ int monochrome= 1;
+
+ FOR_P_RECT(p,*cell) {
+ double alpha= find_aa_density(ri,p,background,foreground,fg_extra);
+
+ int here_int= floor((AAMAXVAL+1)*alpha);
+ assert(here_int <= AAMAXVAL);
+ if (!(here_int==0 || here_int==AAMAXVAL)) monochrome=0;
+ cim->d[p.y * cim->w + p.x]= '0' + here_int;
+ }
+
+ debug_rect("cell0M", colno, *cell);
+
+ require_rectangle_r(*cell, "0123456789", __LINE__);