html5 更新图片颜色示例代码
导读：收集整理的这篇文章主要介绍了html5 更新图片颜色示例代码，觉得挺不错的，现在分享给大家，也给大家做个参考。 复制代码代码如下: <canvas id="c1" width="1220" height = "880" st...
收集整理的这篇文章主要介绍了html5 更新图片颜色示例代码，觉得挺不错的，现在分享给大家，也给大家做个参考。 复制代码代码如下:
canvas id="c1" width="1220" height = "880" style="background: none rePEat scroll 0% 0% transparent; "> /canvas>
script>
VAR cID = "c1";
var image = new Image();
image.src = "Eye/ITem_eye_1.png";
image.onload = function () {
recolorImage(cID,image, 0, 0, 0, 255, 0, 0);
}
function recolorImage(c,img, oldred, oldGreen, oldBlue, newRed, newGreen, newBlue) {
var c = document.getElementById(c);
var ctx = c.getContext("2d");
var w = img.width;
var h = img.height;
c.width = w;
c.height = h;
// draw the image on the temporary canvas
ctx.drawImage(img, 0, 0, w, h);
// pull the entire image into an array of pixel data
var imageData = ctx.getImageData(0, 0, w, h);
// examine every pixel,
// change any old rgb to the new-rgb
for (var i = 0; i imageData.data.length; i += 4) {
// is this pixel the old rgb?
if (imageData.data[i] == oldRed & & imageData.data[i + 1] == oldGreen & & imageData.data[i + 2] == oldBlue) {
// change to your new rgb
imageData.data[i] = newRed;
imageData.data[i + 1] = newGreen;
imageData.data[i + 2] = newBlue;
}
}
// put the altered data back on the canvas
ctx.putImageData(imageData, 0, 0);
}
/script>
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