* [task#127424] use getCanvasSize of think3c widget.

lib/zin/wg/think3c/js/v1.js

@@ -1,39 +1,21 @@
 $(document).ready(function()
 {
-    const canvas    = $('#canvas')[0];
-    const ctx       = canvas.getContext('2d');
-    const image     = new Image();
-    const maxWidth  = $('.think-model-content').width() || 500;
-    const maxHeight = maxWidth;
+    const canvas = $('#canvas')[0];
+    const ctx    = canvas.getContext('2d');
+    const image  = new Image();
 
+    image.src    = modelImg;
     image.onload = function()
     {
-        let width  = image.width;
-        let height = image.height;
+        const size = getCanvasSize(image.width, image.height);
+        canvas.width = size.width;
+        canvas.height = size.height;
+        ctx.drawImage(image, 0, 0, size.width, size.height);
 
-        if(width > maxWidth || height > maxHeight)
-        {
-            if(width > height)
-            {
-                height *= maxWidth / width;
-                width   = maxWidth;
-            }
-            else
-            {
-                width  *= maxHeight / height;
-                height  = maxHeight;
-            }
-        }
-
-        canvas.width  = width;
-        canvas.height = height;
-        ctx.drawImage(image, 0, 0, width, height);
-
-        const imageData = ctx.getImageData(0, 0, width, height);
-        const pixels    = binarizeImage(imageData);
+        const imageData  = ctx.getImageData(0, 0, size.width, size.height);
+        const pixels     = binarizeImage(imageData);
         ctx.putImageData(pixels, 0, 0);
     };
-    image.src = modelImg;
 
     /* 检查图片是否已加载完成，如未完成，手动触发处理逻辑。*/
     /* Check if the image has been loaded completely. If not, manually trigger the processing logic. */