+ [task#127424] add region coloring logic.

2024-09-05 16:39:53 +08:00
parent 2c096aa195
commit b348b851db
1 changed files with 10 additions and 0 deletions
@@ -189,10 +189,20 @@ function colorRegions(binaryImageData)
            const pixels = ctx.getImageData(0, 0, canvas.width, canvas.height).data;
            let regions  = findRegions(pixels, canvas.width, canvas.height);

+            ctx.globalCompositeOperation = 'source-over';
+
            /* 过滤掉小区域。 */
            /* Filter out small regions. */
            const minArea = 90;
            regions       = regions.filter(r => r.area >= minArea);
+
+            regions.forEach((region, colorIndex) => {
+                /* 保存当前状态。 */
+                /* Save current state. */
+                ctx.save();
+
+                ctx.fillStyle = colors[colorIndex % colors.length];
+            });
            resolve(canvas.toDataURL());
        };
    });