js核心代码

复制代码 代码如下:

/*

*canvasid:html canvas标签id

*imageid:html img 标签id

*gridcountX:x轴图片分割个数

*gridcountY:y轴图片分割个数

*gridspace:宫格空隙

*offsetX：x*y宫格相对canvas（0，0）X坐标偏移量

**offsetX：x*y宫格相对canvas（0，0）Y坐标偏移量

*isanimat：是否启用动画显示

*/

function ImageGrid(canvasid, imageid, gridcountX, gridcountY, gridspace, offsetX, offsetY, isanimat) {

var image = new Image();

var g = document.getElementById(canvasid).getContext("2d");

var img=document.getElementById(imageid);

image.src=img.getAttribute("src");

g.drawImage(image, 0, 0);

var imagedata = g.getImageData(0, 0, image.width, image.height);

var grid_width = imagedata.width / gridcountX;

var grid_height = imagedata.height / gridcountY;

//动画

if (isanimat) {

var x = 0,

y = 0;

var inter = setInterval(function() {

g.putImageData(imagedata, gridspace * x + offsetX, gridspace * y + offsetY, grid_width * x, grid_height * y, grid_width, grid_height);

x < gridcountX ? x++ : x = 0;

if (x == 0) {

y < gridcountY ? y++ : y = 0;

}

}, 200);

y == gridcountY ? clearInterval(inter) : null;

} else { //非动画

for (var y = 0; y < gridcountY; y++) {

for (var x = 0; x < gridcountX; x++) {

g.putImageData(imagedata, gridspace * x + offsetX, gridspace * y + offsetY, grid_width * x, grid_height * y, grid_width, grid_height);

}

}

}

}

html代码

复制代码 代码如下:

<canvas id="canvas1" width="900px" height="550px">Canvas demo</canvas>

<img id="image1" src="http://files.jb51.net/file_images/article/201412/2014122894620636.jpg"/>

使用方法：

复制代码 代码如下:

//eg...

ImageGrid("canvas1", "image1", 3, 3, 2, 220, 0, true); //3*3

ImageGrid("canvas1", "image1", 4, 4, 2, 440, 0, true); //4*4

ImageGrid("canvas1", "image1", 3, 4, 2, 660, 0, false); //3*4

代码很简洁，效果却非常炫酷，小伙伴们学会了吗？