js核心代碼
復制代碼 代碼如下:
/*
*canvasid:html canvas標簽id
*imageid:html img 標簽id
*gridcountX:x軸圖片分割個數
*gridcountY:y軸圖片分割個數
*gridspace:宮格空隙
*offsetX：x*y宮格相對canvas（0，0）X坐標偏移量
**offsetX：x*y宮格相對canvas（0，0）Y坐標偏移量
*isanimat：是否啟用動畫顯示
*/
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;
//動畫
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 { //非動畫
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代碼
復制代碼 代碼如下:
<canvas id="canvas1" width="900px" height="550px">Canvas demo</canvas>
<img id="image1" style="display:none" src="http://files.jb51.net/file_images/article/201412/2014122894620636.jpg"/>
使用方法：
復制代碼 代碼如下:
//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
代碼很簡潔，效果卻非常炫酷，小伙伴們學會了嗎？