![](\"https://assets.leetcode.com/uploads/2021/06/01/flood1-grid.jpg\")
An image is represented by an m x n integer grid image where image[i][j] represents the pixel value of the image.
You are also given three integers sr, sc, and color. You should perform a flood fill on the image starting from the pixel image[sr][sc].
To perform a flood fill, consider the starting pixel, plus any pixels connected 4-directionally to the starting pixel of the same color as the starting pixel, plus any pixels connected 4-directionally to those pixels (also with the same color), and so on. Replace the color of all of the aforementioned pixels with color.
Return the modified image after performing the flood fill.
\n\n\n
Example 1:
\n\n\nInput: image = [[1,1,1],[1,1,0],[1,0,1]], sr = 1, sc = 1, color = 2\nOutput: [[2,2,2],[2,2,0],[2,0,1]]\nExplanation: From the center of the image with position (sr, sc) = (1, 1) (i.e., the red pixel), all pixels connected by a path of the same color as the starting pixel (i.e., the blue pixels) are colored with the new color.\nNote the bottom corner is not colored 2, because it is not 4-directionally connected to the starting pixel.\n\n\n
Example 2:
\n\n\nInput: image = [[0,0,0],[0,0,0]], sr = 0, sc = 0, color = 0\nOutput: [[0,0,0],[0,0,0]]\nExplanation: The starting pixel is already colored 0, so no changes are made to the image.\n\n\n
\n
Constraints:
\n\nm == image.lengthn == image[i].length1 <= m, n <= 500 <= image[i][j], color < 2160 <= sr < m0 <= sc < n有一幅以 m x n 的二维整数数组表示的图画 image ，其中 image[i][j] 表示该图画的像素值大小。
你也被给予三个整数 sr , sc 和 newColor 。你应该从像素 image[sr][sc] 开始对图像进行 上色填充 。
为了完成 上色工作 ，从初始像素开始，记录初始坐标的 上下左右四个方向上 像素值与初始坐标相同的相连像素点，接着再记录这四个方向上符合条件的像素点与他们对应 四个方向上 像素值与初始坐标相同的相连像素点，……，重复该过程。将所有有记录的像素点的颜色值改为 newColor 。
最后返回 经过上色渲染后的图像 。
\n\n\n\n
示例 1:
\n\n
\n输入: image = [[1,1,1],[1,1,0],[1,0,1]]，sr = 1, sc = 1, newColor = 2\n输出: [[2,2,2],[2,2,0],[2,0,1]]\n解析: 在图像的正中间，(坐标(sr,sc)=(1,1)),在路径上所有符合条件的像素点的颜色都被更改成2。\n注意，右下角的像素没有更改为2，因为它不是在上下左右四个方向上与初始点相连的像素点。\n\n\n
示例 2:
\n\n\n输入: image = [[0,0,0],[0,0,0]], sr = 0, sc = 0, newColor = 2\n输出: [[2,2,2],[2,2,2]]\n\n\n
\n\n
提示:
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