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public class mygdi
{
public static void createwatermark(string ssrcfilepath, string sdstfilepath, string stext1, string scolor1, string ssize1, string sfont1, string stext2, string scolor2, string ssize2, string sfont2, string sbgcolor, string stransparence)
{
system.drawing.image image = system.drawing.image.fromfile(ssrcfilepath);
graphics g = graphics.fromimage(image);
g.smoothingmode = smoothingmode.antialias;
g.interpolationmode = interpolationmode.highqualitybicubic;
g.compositingquality = compositingquality.highquality;
g.textrenderinghint = system.drawing.text.textrenderinghint.antialias; //文字抗锯齿
g.drawimage(image, 0, 0, image.width, image.height);
font f1 = new font(sfont1, float.parse(ssize1));
font f2 = new font(sfont2, float.parse(ssize2));
brush brushfortext1 = new solidbrush(colortranslator.fromhtml(scolor1));
brush brushfortext2 = new solidbrush(colortranslator.fromhtml(scolor2));
brush brushforbg = new solidbrush(color.fromargb(convert.toint16(255 * float.parse(stransparence)), colortranslator.fromhtml(sbgcolor)));
g.rotatetransform(-20);
rectangle rect = new rectangle(-image.width/2-50, image.height - 50, image.width * 2, 40);
g.drawrectangle(new pen(brushforbg), rect);
g.fillrectangle(brushforbg, rect);
rectangle rectfortext1 = new rectangle(-image.width/2 + image.width / 5, image.height - 45, image.width * 2, 60);
for (int i = 0; i < 10; i++)
g.drawstring(stext1, f1, brushfortext1, rectfortext1);
rectangle rectfortext2 = new rectangle(-image.width / 2 + image.width / 5, image.height -25, image.width * 2, 60);
for (int i = 0; i < 10; i++)
g.drawstring(stext2, f2, brushfortext2, rectfortext2);
image.save(sdstfilepath, imageformat.jpeg);
image.dispose();
}
public static void createroundedcorner(string ssrcfilepath, string sdstfilepath, string scornerlocation)
{
system.drawing.image image = system.drawing.image.fromfile(ssrcfilepath);
graphics g = graphics.fromimage(image);
g.smoothingmode = smoothingmode.highquality;
g.interpolationmode = interpolationmode.highqualitybicubic;
g.compositingquality = compositingquality.highquality;
rectangle rect = new rectangle(0, 0, image.width, image.height);
graphicspath rectpath = createroundrectanglepath(rect, image.width / 10, scornerlocation); //构建圆角外部路径
brush b = new solidbrush(color.white);//圆角背景白色
g.drawpath(new pen(b), rectpath);
g.fillpath(b, rectpath);
g.dispose();
image.save(sdstfilepath, imageformat.jpeg);
image.dispose();
}
public static void createplaintext(string ssrcfilepath, string sdstfilepath,string stext, string scolor, string ssize, string sfont)
{
system.drawing.image image = system.drawing.image.fromfile(ssrcfilepath);
graphics g = graphics.fromimage(image);
g.smoothingmode = smoothingmode.antialias;
g.interpolationmode = interpolationmode.highqualitybicubic;
g.compositingquality = compositingquality.highquality;
g.drawimage(image, 0, 0, image.width, image.height);
g.textrenderinghint = system.drawing.text.textrenderinghint.antialias; //文字抗锯齿
font f = new font(sfont,float.parse(ssize));
brush b = new solidbrush(colortranslator.fromhtml(scolor));
rectangle rect = new rectangle(10, 5, image.width, image.height); //适当空开一段距离
for (int i = 0; i < 30; i++) //加强亮度
g.drawstring(stext, f, b, rect);
image.save(sdstfilepath, imageformat.jpeg);
image.dispose();
}
private static graphicspath createroundrectanglepath(rectangle rect, int radius, string sposition)
{
graphicspath rectpath = new graphicspath();
switch (sposition)
{
case "topleft":
{
rectpath.addarc(rect.left, rect.top, radius * 2, radius * 2, 180, 90);
rectpath.addline(rect.left, rect.top, rect.left, rect.top + radius);
break;
}
case "topright":
{
rectpath.addarc(rect.right - radius * 2, rect.top, radius * 2, radius * 2, 270, 90);
rectpath.addline(rect.right, rect.top, rect.right - radius, rect.top);
break;
}
case "bottomleft":
{
rectpath.addarc(rect.left, rect.bottom - radius * 2, radius * 2, radius * 2, 90, 90);
rectpath.addline(rect.left, rect.bottom - radius, rect.left, rect.bottom);
break;
}
case "bottomright":
{
rectpath.addarc(rect.right - radius * 2, rect.bottom - radius * 2, radius * 2, radius * 2, 0, 90);
rectpath.addline(rect.right - radius, rect.bottom, rect.right, rect.bottom);
break;
}
}
return rectpath;
}
}
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