init lserp cs 5.0
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cyf
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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namespace Zhaizj.Framework.Drawing {
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/// <summary>
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/// 水印工具
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/// </summary>
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public class Watermark {
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/// <summary>
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/// 将原始图片添加图片水印之后存储
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/// </summary>
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/// <param name="srcPath"></param>
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/// <param name="savePath"></param>
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/// <param name="watermarkPath"></param>
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/// <param name="wp"></param>
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public static void MakeByPic( String srcPath, String savePath, String watermarkPath, WatermarkPosition wp ) {
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using (Image src = Image.FromFile( srcPath )) {
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using (Bitmap bm = new Bitmap( srcPath )) {
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using (Graphics g = Graphics.FromImage( bm )) {
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using (Image wm = Image.FromFile( watermarkPath )) {
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ImageAttributes imgAttr = getImageAttributes();
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Rectangle rect = getPicRectangle( src, wm, wp );
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g.DrawImage( wm, rect, 0, 0, wm.Width, wm.Height, GraphicsUnit.Pixel, imgAttr );
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try {
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bm.Save( savePath );
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}
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catch (Exception e) {
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throw e;
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}
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}
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}
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}
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}
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}
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private static ImageAttributes getImageAttributes() {
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ImageAttributes imgAttr = new ImageAttributes();
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ColorMap colorMap = new ColorMap();
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colorMap.OldColor = Color.FromArgb( 255, 0, 255, 0 );
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colorMap.NewColor = Color.FromArgb( 0, 0, 0, 0 );
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ColorMap[] remapTable = { colorMap };
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imgAttr.SetRemapTable( remapTable, ColorAdjustType.Bitmap );
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float[][] colorMatrixElements = {
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new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
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new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
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new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
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new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f},
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new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
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};
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ColorMatrix wmColorMatrix = new ColorMatrix( colorMatrixElements );
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imgAttr.SetColorMatrix( wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap );
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return imgAttr;
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}
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private static Rectangle getPicRectangle( Image src, Image wm, WatermarkPosition wp ) {
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int x = 10;
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int y = 10;
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if (wp == WatermarkPosition.TopLeft) {
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}
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else if (wp == WatermarkPosition.TopCenter) {
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x = src.Width / 2 - wm.Width / 2;
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y = 10;
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}
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else if (wp == WatermarkPosition.TopRight) {
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x = ((src.Width - wm.Width) - 10);
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y = 10;
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}
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else if (wp == WatermarkPosition.BottomLeft) {
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x = 10;
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y = src.Height - wm.Height - 10;
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}
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else if (wp == WatermarkPosition.BottomCenter) {
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x = src.Width / 2 - wm.Width / 2;
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y = src.Height - wm.Height - 10;
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}
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else if (wp == WatermarkPosition.BottomRight) {
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x = ((src.Width - wm.Width) - 10);
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y = src.Height - wm.Height - 10;
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}
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return new Rectangle( x, y, wm.Width, wm.Height );
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}
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/// <summary>
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/// 将原始图片添加文字水印之后存储
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/// </summary>
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/// <param name="srcPath"></param>
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/// <param name="savePath"></param>
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/// <param name="words"></param>
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/// <param name="wp"></param>
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/// <param name="fontSize"></param>
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public static void MakeByText( String srcPath, String savePath, String words, WatermarkPosition wp, int fontSize ) {
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using (Image src = Image.FromFile( srcPath )) {
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using (Bitmap bm = new Bitmap( srcPath )) {
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using (Graphics g = Graphics.FromImage( bm )) {
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FontAndSize fs = FontAndSize.GetValue( g, words, "arial", fontSize, src.Width );
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PointF p = getTextPoint( src, fs.size, wp );
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StringFormat sf = getStringFormat();
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drawText( g, words, fs.font, p, sf );
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try {
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bm.Save( savePath );
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}
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catch (Exception e) {
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throw e;
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}
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}
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}
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}
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}
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private static void drawText( Graphics g, String wmText, Font font, PointF p, StringFormat format ) {
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SolidBrush brush = new SolidBrush( Color.FromArgb( 153, 255, 255, 255 ) );
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g.DrawString( wmText, font, brush, p, format );
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SolidBrush brush2 = new SolidBrush( Color.FromArgb( 153, 0, 0, 0 ) );
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g.DrawString( wmText, font, brush2, new PointF( p.X + 1, p.Y + 1 ), format );
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}
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private static StringFormat getStringFormat() {
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StringFormat StrFormat = new StringFormat();
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StrFormat.Alignment = StringAlignment.Center;
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return StrFormat;
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}
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private static PointF getTextPoint( Image src, SizeF textSize, WatermarkPosition wp ) {
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float x = textSize.Width / 2 + 5;
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float y = textSize.Height / 2 + 5;
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int margin = 10;
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if (wp == WatermarkPosition.TopLeft) {
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x = getLeftPosition( src, textSize, margin );
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y = getTopPosition( src, textSize, margin );
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}
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else if (wp == WatermarkPosition.TopCenter) {
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x = src.Width / 2;
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y = getTopPosition( src, textSize, margin );
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}
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else if (wp == WatermarkPosition.TopRight) {
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x = getRightPosition( src, textSize, margin );
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y = getTopPosition( src, textSize, margin );
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}
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else if (wp == WatermarkPosition.BottomLeft) {
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x = getLeftPosition( src, textSize, margin );
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y = getBottomPosition( src, textSize, margin );
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}
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else if (wp == WatermarkPosition.BottomCenter) {
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x = src.Width / 2;
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y = getBottomPosition( src, textSize, margin );
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}
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else if (wp == WatermarkPosition.BottomRight) {
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x = getRightPosition( src, textSize, margin );
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y = getBottomPosition( src, textSize, margin );
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}
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return new PointF( x, y );
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}
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private static float getLeftPosition( Image src, SizeF textSize, int margin ) {
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return textSize.Width / 2 + margin;
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}
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private static float getTopPosition( Image src, SizeF textSize, int margin ) {
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return textSize.Height / 2 + margin / 2;
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}
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private static float getRightPosition( Image src, SizeF textSize, int margin ) {
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float x = src.Width - margin * 2 - (textSize.Width / 2);
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return x;
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}
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private static float getBottomPosition( Image src, SizeF textSize, int margin ) {
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float y = src.Height - margin * 2 - (textSize.Height / 2);
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return y;
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}
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}
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}
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