[optm] 杂线减少

fonts/ttf/ttf_render.cpp

@@ -79,7 +79,11 @@ void ttf_outline_to_segments(const ttf_outline_t* outline,
                 }
             }
         }
-        if (pending >= 0) PUSH_QUAD(anchor, pending, start);
+        if (pending >= 0) {
+            PUSH_QUAD(anchor, pending, start);
+        } else if (anchor != start) {
+            PUSH_LINE(anchor, start);
+        }
 
         #undef GET_X
         #undef GET_Y
@@ -193,11 +197,10 @@ void ttf_rasterize(const ttf_seg_t* segs, SUINT32 num_segs,
                 while (j > 0 && xs[j-1] > v) { xs[j] = xs[j-1]; j--; }
                 xs[j] = v;
             }
-            // Deduplicate: merge intersections within 1 pixel (64 in 26.6)
+            // Deduplicate: merge intersections within 1/16 pixel (4 in 26.6)
             SUINT32 nxd = 0;
             for (SUINT32 i = 0; i < nxs; i++) {
-                if (nxd > 0 && (xs[i] - xs[nxd - 1]) < 64) {
-                    // Near-duplicate — skip to avoid spurious fill slivers
+                if (nxd > 0 && (xs[i] - xs[nxd - 1]) < 4) {
                     continue;
                 }
                 xs[nxd++] = xs[i];