图片问题 保存在磁盘下的图片,读到程序里再实现对其任意角度的旋转,怎样做?请能人指点!! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 我在D盘下有个BMP---23.bmp,读取到程序里,再对其进行任意角度的旋转,能说详细些吗? <script> function rotateImage(HTMLControlID) { if(window.navigator.userAgent.indexOf('MSIE') > -1) { if(n!=1) { k+=1; } var degree=k%4*90; //处理IE浏览器 var imageToRotate = document.getElementById(HTMLControlID); imageToRotate.style.filter= "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand')"; var deg2radians = Math.PI * 2 / 360; var degreeToRotate =degree // 旋转度数; rad = degreeToRotate * deg2radians ; costheta = Math.cos(rad); sintheta = Math.sin(rad); imageToRotate.filters.item(0).M11 = costheta; imageToRotate.filters.item(0).M12 = -sintheta; imageToRotate.filters.item(0).M21 = sintheta; imageToRotate.filters.item(0).M22 = costheta; var w=document.getElementById(HTMLControlID).width; var h=document.getElementById(HTMLControlID).height; document.getElementById(HTMLControlID).width=h; document.getElementById(HTMLControlID).height=w; n+=1; if(n<2) { rotateImage(HTMLControlID); } else { n=0; } } } </script><A href="javascript:rotateImage('img1);" title='旋转'><img src='images\\旋转.png' border=0></A>利用js脚本实现。 /// <summary> /// 任意角度旋转 /// </summary> /// <param name="bmp">原始图Bitmap</param> /// <param name="angle">旋转角度</param> /// <param name="bkColor">背景色</param> /// <returns>输出Bitmap</returns> public static Bitmap KiRotate(Bitmap bmp, float angle, Color bkColor) { int w = bmp.Width + 2; int h = bmp.Height + 2; PixelFormat pf; if (bkColor == Color.Transparent) { pf = PixelFormat.Format32bppArgb; } else { pf = bmp.PixelFormat; } Bitmap tmp = new Bitmap(w, h, pf); Graphics g = Graphics.FromImage(tmp); g.Clear(bkColor); g.DrawImageUnscaled(bmp, 1, 1); g.Dispose(); GraphicsPath path = new GraphicsPath(); path.AddRectangle(new RectangleF(0f, 0f, w, h)); Matrix mtrx = new Matrix(); mtrx.Rotate(angle); RectangleF rct = path.GetBounds(mtrx); Bitmap dst = new Bitmap((int)rct.Width, (int)rct.Height, pf); g = Graphics.FromImage(dst); g.Clear(bkColor); g.TranslateTransform(-rct.X, -rct.Y); g.RotateTransform(angle); g.InterpolationMode = InterpolationMode.HighQualityBilinear; g.DrawImageUnscaled(tmp, 0, 0); g.Dispose(); tmp.Dispose(); return dst; }参考:http://blog.csdn.net/ki1381/archive/2007/01/28/1495943.aspx Images类里面有这个方法,去MSDN里看看吧 如何用户输入Regex.Replace中的正则字符串? 数据源数据集移植问题 取n个数当中最小的3个数的算法 高手请进 (高分急求)将特定文件夹中的.lnk文件导入contextMenuStrip 关于流的最简单问题 散分的问题!!!win95最大支持多大硬盘,能支持40G或更大?在线等,及时给分。 线程转换问题? 我想用C#写一个数据上传和下载的应用,请教运用的技术和思路! C#中事件可以重进入吗,即A事件在执行,同时B事件发生,他们之间的执行机制是什么? (求助)一个客户端连接多台TelnetServer问题。。。 请教高手,在利用反射时如何来识别某个参数是个 params 的问题。
function rotateImage(HTMLControlID) {
if(window.navigator.userAgent.indexOf('MSIE') > -1)
{
if(n!=1)
{
k+=1;
}
var degree=k%4*90;
//处理IE浏览器
var imageToRotate = document.getElementById(HTMLControlID); imageToRotate.style.filter= "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand')";
var deg2radians = Math.PI * 2 / 360;
var degreeToRotate =degree // 旋转度数;
rad = degreeToRotate * deg2radians ;
costheta = Math.cos(rad);
sintheta = Math.sin(rad);
imageToRotate.filters.item(0).M11 = costheta;
imageToRotate.filters.item(0).M12 = -sintheta;
imageToRotate.filters.item(0).M21 = sintheta;
imageToRotate.filters.item(0).M22 = costheta;
var w=document.getElementById(HTMLControlID).width;
var h=document.getElementById(HTMLControlID).height;
document.getElementById(HTMLControlID).width=h;
document.getElementById(HTMLControlID).height=w;
n+=1;
if(n<2)
{
rotateImage(HTMLControlID);
}
else
{
n=0;
}
}
}
</script>
<A href="javascript:rotateImage('img1);" title='旋转'><img src='images\\旋转.png' border=0></A>利用js脚本实现。
/// <summary>
/// 任意角度旋转
/// </summary>
/// <param name="bmp">原始图Bitmap</param>
/// <param name="angle">旋转角度</param>
/// <param name="bkColor">背景色</param>
/// <returns>输出Bitmap</returns>
public static Bitmap KiRotate(Bitmap bmp, float angle, Color bkColor)
{
int w = bmp.Width + 2;
int h = bmp.Height + 2; PixelFormat pf; if (bkColor == Color.Transparent)
{
pf = PixelFormat.Format32bppArgb;
}
else
{
pf = bmp.PixelFormat;
} Bitmap tmp = new Bitmap(w, h, pf);
Graphics g = Graphics.FromImage(tmp);
g.Clear(bkColor);
g.DrawImageUnscaled(bmp, 1, 1);
g.Dispose(); GraphicsPath path = new GraphicsPath();
path.AddRectangle(new RectangleF(0f, 0f, w, h));
Matrix mtrx = new Matrix();
mtrx.Rotate(angle);
RectangleF rct = path.GetBounds(mtrx); Bitmap dst = new Bitmap((int)rct.Width, (int)rct.Height, pf);
g = Graphics.FromImage(dst);
g.Clear(bkColor);
g.TranslateTransform(-rct.X, -rct.Y);
g.RotateTransform(angle);
g.InterpolationMode = InterpolationMode.HighQualityBilinear;
g.DrawImageUnscaled(tmp, 0, 0);
g.Dispose(); tmp.Dispose(); return dst;
}
参考:http://blog.csdn.net/ki1381/archive/2007/01/28/1495943.aspx