/// <summary>
/// Put an image stream out. Use by Chart and Image
/// </summary>
/// <param name="ioin"></param>
/// <param name="width"></param>
/// <param name="height"></param>
void PutImage(System.DrawingCore.Image im, int width, int height)
{
MemoryStream ostrm = new MemoryStream();
ImageFormat imf;
imf = ImageFormat.Png;
im.Save(ostrm, imf);
byte[] ba = ostrm.ToArray();
ostrm.Close();
tw.Write('{');
// convert height/width to twips
// ???? not sure what picw pich units should really be??
int h = GetTwipsFromPixels(height <= 0 ? im.Height : height);
int w = GetTwipsFromPixels(width <= 0 ? im.Width : width);
int imw_twip = GetTwipsFromPixels(im.Width);
int imh_twip = GetTwipsFromPixels(im.Height);
tw.Write(@"\pict\pngblip\picwgoal{2}\pichgoal{3} ",
w, h, imw_twip, imh_twip);
//tw.Write(@"\pict\jpegblip\picw423\pich423\picwgoal{2}\pichgoal{3} ",
// w, h, imw_twip, imh_twip);
foreach (byte b in ba)
{
tw.Write(HEXCHARS[(byte)((b >> 4) & 0x0f)]);
tw.Write(HEXCHARS[(byte)(b & 0x0f)]);
}
tw.Write('}');
return;
}
public void Image(Image i, Row r, string mimeType, Stream ioin)
{
using (System.DrawingCore.Image im = System.DrawingCore.Image.FromStream(ioin))
{
PutImage(im, i.Width == null ? 0 : i.Width.PixelsX, i.Height == null ? 0 : i.Height.PixelsY);
}
if (InTable(i))
{
tw.Write(@"\cell");
}
//switch (i.Sizing)
//{
// case ImageSizingEnum.AutoSize:
// break; // this is right
// case ImageSizingEnum.Clip:
// break; // not sure how to clip it
// case ImageSizingEnum.Fit:
// if (h > 0)
// sw.Write(" height=\"{0}\"", h.ToString());
// if (w > 0)
// sw.Write(" width=\"{0}\"", w.ToString());
// break;
// case ImageSizingEnum.FitProportional:
// break; // would have to create an image to handle this
//}
}
/**
* Gets the image contents of frame n.
*
* @return BufferedImage representation of frame, or null if n is invalid.
*/
public System.DrawingCore.Image GetFrame(int n)
{
System.DrawingCore.Image im = null;
if ((n >= 0) && (n < frameCount))
{
im = ((GifFrame)frames[n]).image;
}
return(im);
}
public void Chart(Chart c, Row row, ChartBase cb)
{
System.DrawingCore.Image im = cb.Image(r);
PutImage(im, im.Width, im.Height);
if (InTable(c))
{
tw.Write(@"\cell");
}
}
/**
* Resets frame state for reading next image.
*/
protected void ResetFrame()
{
lastDispose = dispose;
lastRect = new Rectangle(ix, iy, iw, ih);
lastImage = image;
lastBgColor = bgColor;
// int dispose = 0;
bool transparency = false;
int delay = 0;
lct = null;
}
public void Create_Gif_Img_To_Png_Test()
{
var isExists = File.Exists(imageGifPath);
Assert.IsTrue(isExists, "文件存在");
AnimatedGifDecoder de = new AnimatedGifDecoder();
de.Read(imageGifPath);
for (int i = 0, count = de.GetFrameCount(); i < count; i++)
{
System.DrawingCore.Image frame = de.GetFrame(i);
frame.Save(outputFilePath + Guid.NewGuid().ToString() + ".png");
}
}
/// <summary>
/// 生成图片缩略图
/// </summary>
/// <param name="sourcePath">图片路径</param>
/// <param name="newPath">新图片路径</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
public static void MakeThumbnail(string sourcePath, string newPath, int width, int height)
{
System.DrawingCore.Image ig = System.DrawingCore.Image.FromFile(sourcePath);
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = ig.Width;
int oh = ig.Height;
if ((double)ig.Width / (double)ig.Height > (double)towidth / (double)toheight)
{
oh = ig.Height;
ow = ig.Height * towidth / toheight;
y = 0;
x = (ig.Width - ow) / 2;
}
else
{
ow = ig.Width;
oh = ig.Width * height / towidth;
x = 0;
y = (ig.Height - oh) / 2;
}
System.DrawingCore.Image bitmap = new System.DrawingCore.Bitmap(towidth, toheight);
System.DrawingCore.Graphics g = System.DrawingCore.Graphics.FromImage(bitmap);
g.InterpolationMode = System.DrawingCore.Drawing2D.InterpolationMode.High;
g.SmoothingMode = System.DrawingCore.Drawing2D.SmoothingMode.HighQuality;
g.Clear(System.DrawingCore.Color.Transparent);
g.DrawImage(ig, new System.DrawingCore.Rectangle(0, 0, towidth, toheight), new System.DrawingCore.Rectangle(x, y, ow, oh), GraphicsUnit.Pixel);
try
{
bitmap.Save(newPath, System.DrawingCore.Imaging.ImageFormat.Jpeg);
}
catch (Exception ex)
{
throw ex;
}
finally
{
ig.Dispose();
bitmap.Dispose();
g.Dispose();
}
}
private void DrawImage(PageImage pi, Graphics g, RectangleF r)
{
Stream strm = null;
System.DrawingCore.Image im = null;
try
{
strm = new MemoryStream(pi.ImageData);
im = System.DrawingCore.Image.FromStream(strm);
DrawImageSized(pi, im, g, r);
}
finally
{
if (strm != null)
{
strm.Close();
}
if (im != null)
{
im.Dispose();
}
}
}
public GifFrame(System.DrawingCore.Image im, int del)
{
image = im;
delay = del;
}
/**
* Reads next frame image
*/
protected void ReadImage()
{
ix = ReadShort(); // (sub)image position & size
iy = ReadShort();
iw = ReadShort();
ih = ReadShort();
int packed = Read();
lctFlag = (packed & 0x80) != 0; // 1 - local color table flag
interlace = (packed & 0x40) != 0; // 2 - interlace flag
// 3 - sort flag
// 4-5 - reserved
lctSize = 2 << (packed & 7); // 6-8 - local color table size
if (lctFlag)
{
lct = ReadColorTable(lctSize); // read table
act = lct; // make local table active
}
else
{
act = gct; // make global table active
if (bgIndex == transIndex)
{
bgColor = 0;
}
}
int save = 0;
if (transparency)
{
save = act[transIndex];
act[transIndex] = 0; // set transparent color if specified
}
if (act == null)
{
status = STATUS_FORMAT_ERROR; // no color table defined
}
if (Error())
{
return;
}
DecodeImageData(); // decode pixel data
Skip();
if (Error())
{
return;
}
frameCount++;
// create new image to receive frame data
// image =
// new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB_PRE);
bitmap = new Bitmap(width, height);
image = bitmap;
SetPixels(); // transfer pixel data to image
frames.Add(new GifFrame(bitmap, delay)); // add image to frame list
if (transparency)
{
act[transIndex] = save;
}
ResetFrame();
}
protected void SetPixels()
{
// expose destination image's pixels as int array
// int[] dest =
// (( int ) image.getRaster().getDataBuffer()).getData();
int[] dest = GetPixels(bitmap);
// fill in starting image contents based on last image's dispose code
if (lastDispose > 0)
{
if (lastDispose == 3)
{
// use image before last
int n = frameCount - 2;
if (n > 0)
{
lastImage = GetFrame(n - 1);
}
else
{
lastImage = null;
}
}
if (lastImage != null)
{
// int[] prev =
// ((DataBufferInt) lastImage.getRaster().getDataBuffer()).getData();
int[] prev = GetPixels(new Bitmap(lastImage));
Array.Copy(prev, 0, dest, 0, width * height);
// copy pixels
if (lastDispose == 2)
{
// fill last image rect area with background color
Graphics g = Graphics.FromImage(image);
Color c = Color.Empty;
if (transparency)
{
c = Color.FromArgb(0, 0, 0, 0); // assume background is transparent
}
else
{
c = Color.FromArgb(lastBgColor);
// c = new Color(lastBgColor); // use given background color
}
Brush brush = new SolidBrush(c);
g.FillRectangle(brush, lastRect);
brush.Dispose();
g.Dispose();
}
}
}
// copy each source line to the appropriate place in the destination
int pass = 1;
int inc = 8;
int iline = 0;
for (int i = 0; i < ih; i++)
{
int line = i;
if (interlace)
{
if (iline >= ih)
{
pass++;
switch (pass)
{
case 2:
iline = 4;
break;
case 3:
iline = 2;
inc = 4;
break;
case 4:
iline = 1;
inc = 2;
break;
}
}
line = iline;
iline += inc;
}
line += iy;
if (line < height)
{
int k = line * width;
int dx = k + ix; // start of line in dest
int dlim = dx + iw; // end of dest line
if ((k + width) < dlim)
{
dlim = k + width; // past dest edge
}
int sx = i * iw; // start of line in source
while (dx < dlim)
{
// map color and insert in destination
int index = ((int)pixels[sx++]) & 0xff;
int c = act[index];
if (c != 0)
{
dest[dx] = c;
}
dx++;
}
}
}
SetPixels(dest);
}
private PageImage BuildImage(Graphics g, string token, StyleInfo oldsi, PageText model)
{
PageTextHtmlCmdLexer hc = new PageTextHtmlCmdLexer(token.Substring(4));
Hashtable ht = hc.Lex();
string src = (string)ht["src"];
if (src == null || src.Length < 1)
{
return(null);
}
string alt = (string)ht["alt"];
string height = (string)ht["height"];
string width = (string)ht["width"];
string align = (string)ht["align"];
Stream strm = null;
System.DrawingCore.Image im = null;
PageImage pi = null;
try
{
// Obtain the image stream
if (src.StartsWith("http:") ||
src.StartsWith("file:") ||
src.StartsWith("https:"))
{
WebRequest wreq = WebRequest.Create(src);
WebResponse wres = wreq.GetResponse();
strm = wres.GetResponseStream();
}
else
{
strm = new FileStream(src, System.IO.FileMode.Open, FileAccess.Read);
}
im = System.DrawingCore.Image.FromStream(strm);
int h = im.Height;
int w = im.Width;
MemoryStream ostrm = new MemoryStream();
ImageFormat imf;
imf = ImageFormat.Jpeg;
im.Save(ostrm, imf);
byte[] ba = ostrm.ToArray();
ostrm.Close();
pi = new PageImage(imf, ba, w, h);
pi.AllowSelect = false;
pi.Page = this.Page;
pi.HyperLink = model.HyperLink;
pi.Tooltip = alt == null ? model.Tooltip : alt;
pi.X = 0;
pi.Y = 0;
pi.W = RSize.PointsFromPixels(g, width != null? Convert.ToInt32(width): w);
pi.H = RSize.PointsFromPixels(g, height != null? Convert.ToInt32(height): h);
pi.SI = new StyleInfo();
}
catch
{
pi = null;
}
finally
{
if (strm != null)
{
strm.Close();
}
if (im != null)
{
im.Dispose();
}
}
return(pi);
}
override internal void RunPage(Pages pgs, Row row)
{
Report r = pgs.Report;
bool bHidden = IsHidden(r, row);
WorkClass wc = GetWC(r);
string mtype = null;
Stream strm = null;
System.DrawingCore.Image im = null;
SetPagePositionBegin(pgs);
if (bHidden)
{
PageImage pi = new PageImage(ImageFormat.Jpeg, null, 0, 0);
this.SetPagePositionAndStyle(r, pi, row);
SetPagePositionEnd(pgs, pi.Y + pi.H);
return;
}
if (wc.PgImage != null)
{ // have we already generated this one
// reuse most of the work; only position will likely change
PageImage pi = new PageImage(wc.PgImage.ImgFormat, wc.PgImage.ImageData, wc.PgImage.SamplesW, wc.PgImage.SamplesH);
pi.Name = wc.PgImage.Name; // this is name it will be shared under
pi.Sizing = this._Sizing;
this.SetPagePositionAndStyle(r, pi, row);
pgs.CurrentPage.AddObject(pi);
SetPagePositionEnd(pgs, pi.Y + pi.H);
return;
}
try
{
strm = GetImageStream(r, row, out mtype);
if (strm == null)
{
r.rl.LogError(4, string.Format("Unable to load image {0}.", this.Name.Nm));
return;
}
im = System.DrawingCore.Image.FromStream(strm);
int height = im.Height;
int width = im.Width;
MemoryStream ostrm = new MemoryStream();
strm.Position = 0;
ImageFormat imf;
switch (mtype.ToLower())
{
case "image/jpeg":
imf = ImageFormat.Jpeg;
CopyStream(strm, ostrm);
break;
case "image/png":
imf = ImageFormat.Png;
CopyStream(strm, ostrm);
break;
default: // from old code where all images convert to jpeg, i don't know why. May be need delete it and add all support formats.
imf = ImageFormat.Jpeg;
System.DrawingCore.Imaging.ImageCodecInfo[] info;
info = ImageCodecInfo.GetImageEncoders();
EncoderParameters encoderParameters;
encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, ImageQualityManager.EmbeddedImageQuality);
System.DrawingCore.Imaging.ImageCodecInfo codec = null;
for (int i = 0; i < info.Length; i++)
{
if (info[i].FormatDescription == "JPEG")
{
codec = info[i];
break;
}
}
im.Save(ostrm, codec, encoderParameters);
break;
}
byte[] ba = ostrm.ToArray();
ostrm.Close();
PageImage pi = new PageImage(imf, ba, width, height);
pi.Sizing = this._Sizing;
this.SetPagePositionAndStyle(r, pi, row);
pgs.CurrentPage.AddObject(pi);
if (_ConstantImage)
{
wc.PgImage = pi;
// create unique name; PDF generation uses this to optimize the saving of the image only once
pi.Name = "pi" + Interlocked.Increment(ref Parser.Counter).ToString(); // create unique name
}
SetPagePositionEnd(pgs, pi.Y + pi.H);
}
catch (Exception e)
{
// image failed to load, continue processing
r.rl.LogError(4, "Image load failed. " + e.Message);
}
finally
{
if (strm != null)
{
strm.Close();
}
if (im != null)
{
im.Dispose();
}
}
return;
}
private void DrawImageSized(PageImage pi, System.DrawingCore.Image im, System.DrawingCore.Graphics g, System.DrawingCore.RectangleF r)
{
float height, width; // some work variables
StyleInfo si = pi.SI;
// adjust drawing rectangle based on padding
System.DrawingCore.RectangleF r2 = new System.DrawingCore.RectangleF(r.Left + PixelsX(si.PaddingLeft),
r.Top + PixelsY(si.PaddingTop),
r.Width - PixelsX(si.PaddingLeft + si.PaddingRight),
r.Height - PixelsY(si.PaddingTop + si.PaddingBottom));
System.DrawingCore.Rectangle ir; // int work rectangle
switch (pi.Sizing)
{
case ImageSizingEnum.AutoSize:
// Note: GDI+ will stretch an image when you only provide
// the left/top coordinates. This seems pretty stupid since
// it results in the image being out of focus even though
// you don't want the image resized.
if (g.DpiX == im.HorizontalResolution &&
g.DpiY == im.VerticalResolution)
{
ir = new System.DrawingCore.Rectangle(Convert.ToInt32(r2.Left), Convert.ToInt32(r2.Top),
im.Width, im.Height);
}
else
{
ir = new System.DrawingCore.Rectangle(Convert.ToInt32(r2.Left), Convert.ToInt32(r2.Top),
Convert.ToInt32(r2.Width), Convert.ToInt32(r2.Height));
}
g.DrawImage(im, ir);
break;
case ImageSizingEnum.Clip:
Region saveRegion = g.Clip;
Region clipRegion = new Region(g.Clip.GetRegionData());
clipRegion.Intersect(r2);
g.Clip = clipRegion;
if (g.DpiX == im.HorizontalResolution &&
g.DpiY == im.VerticalResolution)
{
ir = new System.DrawingCore.Rectangle(Convert.ToInt32(r2.Left), Convert.ToInt32(r2.Top),
im.Width, im.Height);
}
else
{
ir = new System.DrawingCore.Rectangle(Convert.ToInt32(r2.Left), Convert.ToInt32(r2.Top),
Convert.ToInt32(r2.Width), Convert.ToInt32(r2.Height));
}
g.DrawImage(im, ir);
g.Clip = saveRegion;
break;
case ImageSizingEnum.FitProportional:
float ratioIm = (float)im.Height / (float)im.Width;
float ratioR = r2.Height / r2.Width;
height = r2.Height;
width = r2.Width;
if (ratioIm > ratioR)
{ // this means the rectangle width must be corrected
width = height * (1 / ratioIm);
}
else if (ratioIm < ratioR)
{ // this means the ractangle height must be corrected
height = width * ratioIm;
}
r2 = new RectangleF(r2.X, r2.Y, width, height);
g.DrawImage(im, r2);
break;
case ImageSizingEnum.Fit:
default:
g.DrawImage(im, r2);
break;
}
return;
}
private void DrawImageSized(PageImage pi, System.DrawingCore.Image im, Graphics g, RectangleF r)
{
float height, width; // some work variables
StyleInfo si = pi.SI;
// adjust drawing rectangle based on padding
// http://www.fyireporting.com/forum/viewtopic.php?t=892
//A.S.> convert pt to px if needed(when printing we need px, when draw preview - pt)
RectangleF r2;
if (g.PageUnit == GraphicsUnit.Pixel)
{
r2 = new RectangleF(r.Left + (si.PaddingLeft * g.DpiX) / 72,
r.Top + (si.PaddingTop * g.DpiX) / 72,
r.Width - ((si.PaddingLeft + si.PaddingRight) * g.DpiX) / 72,
r.Height - ((si.PaddingTop + si.PaddingBottom) * g.DpiX) / 72);
}
else
{
// adjust drawing rectangle based on padding
r2 = new RectangleF(r.Left + si.PaddingLeft,
r.Top + si.PaddingTop,
r.Width - si.PaddingLeft - si.PaddingRight,
r.Height - si.PaddingTop - si.PaddingBottom);
}
System.DrawingCore.Rectangle ir; // int work rectangle
ir = new System.DrawingCore.Rectangle(Convert.ToInt32(r2.Left), Convert.ToInt32(r2.Top),
Convert.ToInt32(r2.Width), Convert.ToInt32(r2.Height));
switch (pi.Sizing)
{
case ImageSizingEnum.AutoSize:
// Note: GDI+ will stretch an image when you only provide
// the left/top coordinates. This seems pretty stupid since
// it results in the image being out of focus even though
// you don't want the image resized.
if (g.DpiX == im.HorizontalResolution &&
g.DpiY == im.VerticalResolution)
{
ir = new System.DrawingCore.Rectangle(Convert.ToInt32(r2.Left), Convert.ToInt32(r2.Top),
im.Width, im.Height);
}
g.DrawImage(im, ir);
break;
case ImageSizingEnum.Clip:
Region saveRegion = g.Clip;
Region clipRegion = new Region(g.Clip.GetRegionData());
clipRegion.Intersect(r2);
g.Clip = clipRegion;
if (g.DpiX == im.HorizontalResolution &&
g.DpiY == im.VerticalResolution)
{
ir = new System.DrawingCore.Rectangle(Convert.ToInt32(r2.Left), Convert.ToInt32(r2.Top),
im.Width, im.Height);
}
g.DrawImage(im, ir);
g.Clip = saveRegion;
break;
case ImageSizingEnum.FitProportional:
float ratioIm = (float)im.Height / (float)im.Width;
float ratioR = r2.Height / r2.Width;
height = r2.Height;
width = r2.Width;
if (ratioIm > ratioR)
{ // this means the rectangle width must be corrected
width = height * (1 / ratioIm);
}
else if (ratioIm < ratioR)
{ // this means the ractangle height must be corrected
height = width * ratioIm;
}
r2 = new RectangleF(r2.X, r2.Y, width, height);
g.DrawImage(im, r2);
break;
case ImageSizingEnum.Fit:
default:
g.DrawImage(im, r2);
break;
}
//if (SelectTool && pi.AllowSelect && _SelectList.Contains(pi))
//{
// g.FillRectangle(new SolidBrush(Color.FromArgb(50, _SelectItemColor)), ir);
//}
return;
}
private void DrawImageBackground(PageImage pi, StyleInfo si, Graphics g, RectangleF r)
{
Stream strm = null;
System.DrawingCore.Image im = null;
try
{
strm = new MemoryStream(pi.ImageData);
im = System.DrawingCore.Image.FromStream(strm);
// http://www.fyireporting.com/forum/viewtopic.php?t=892
//A.S.> convert pt to px if needed(when printing we need px, when draw preview - pt)
RectangleF r2;
if (g.PageUnit == GraphicsUnit.Pixel)
{
r2 = new RectangleF(r.Left + (si.PaddingLeft * g.DpiX) / 72,
r.Top + (si.PaddingTop * g.DpiX) / 72,
r.Width - ((si.PaddingLeft + si.PaddingRight) * g.DpiX) / 72,
r.Height - ((si.PaddingTop + si.PaddingBottom) * g.DpiX) / 72);
}
else
{
// adjust drawing rectangle based on padding
r2 = new RectangleF(r.Left + si.PaddingLeft,
r.Top + si.PaddingTop,
r.Width - si.PaddingLeft - si.PaddingRight,
r.Height - si.PaddingTop - si.PaddingBottom);
}
int repeatX = 0;
int repeatY = 0;
switch (pi.Repeat)
{
case ImageRepeat.Repeat:
repeatX = (int)Math.Floor(r2.Width / pi.SamplesW);
repeatY = (int)Math.Floor(r2.Height / pi.SamplesH);
break;
case ImageRepeat.RepeatX:
repeatX = (int)Math.Floor(r2.Width / pi.SamplesW);
repeatY = 1;
break;
case ImageRepeat.RepeatY:
repeatY = (int)Math.Floor(r2.Height / pi.SamplesH);
repeatX = 1;
break;
case ImageRepeat.NoRepeat:
default:
repeatX = repeatY = 1;
break;
}
//make sure the image is drawn at least 1 times
repeatX = Math.Max(repeatX, 1);
repeatY = Math.Max(repeatY, 1);
float startX = r2.Left;
float startY = r2.Top;
Region saveRegion = g.Clip;
Region clipRegion = new Region(g.Clip.GetRegionData());
clipRegion.Intersect(r2);
g.Clip = clipRegion;
for (int i = 0; i < repeatX; i++)
{
for (int j = 0; j < repeatY; j++)
{
float currX = startX + i * pi.SamplesW;
float currY = startY + j * pi.SamplesH;
g.DrawImage(im, new RectangleF(currX, currY, pi.SamplesW, pi.SamplesH));
}
}
g.Clip = saveRegion;
}
finally
{
if (strm != null)
{
strm.Close();
}
if (im != null)
{
im.Dispose();
}
}
}
/// <summary>
/// 增加图片文字水印
/// </summary>
/// <param name="filename">文件名</param>
/// <param name="watermarkText">水印文字</param>
/// <param name="watermarkStatus">图片水印位置</param>
public static void AddImageSignText(System.DrawingCore.Image img, string filename, string watermarkText, int watermarkStatus, int quality, string fontname, int fontsize)
{
Graphics g = Graphics.FromImage(img);
Font drawFont = new Font(fontname, fontsize, FontStyle.Regular, GraphicsUnit.Pixel);
SizeF crSize;
crSize = g.MeasureString(watermarkText, drawFont);
float xpos = 0;
float ypos = 0;
switch (watermarkStatus)
{
case 1:
xpos = (float)img.Width * (float).01;
ypos = (float)img.Height * (float).01;
break;
case 2:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = (float)img.Height * (float).01;
break;
case 3:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = (float)img.Height * (float).01;
break;
case 4:
xpos = (float)img.Width * (float).01;
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 5:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 6:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 7:
xpos = (float)img.Width * (float).01;
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
case 8:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
case 9:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
}
g.DrawString(watermarkText, drawFont, new SolidBrush(Color.White), xpos + 1, ypos + 1);
g.DrawString(watermarkText, drawFont, new SolidBrush(Color.Black), xpos, ypos);
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo codec in codecs)
{
if (codec.MimeType.IndexOf("jpeg") > -1)
{
ici = codec;
}
}
EncoderParameters encoderParams = new EncoderParameters();
long[] qualityParam = new long[1];
if (quality < 0 || quality > 100)
{
quality = 80;
}
qualityParam[0] = quality;
EncoderParameter encoderParam = new EncoderParameter(System.DrawingCore.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam;
if (ici != null)
{
img.Save(filename, ici, encoderParams);
}
else
{
img.Save(filename);
}
g.Dispose();
img.Dispose();
}
/// <summary>
/// 生成缩略图到MemoryStream
/// </summary>
/// <param name="SourceFile"></param>
/// <param name="intThumbWidth"></param>
/// <param name="intThumbHeight"></param>
/// <param name="gap">是否补足空白</param>
public static MemoryStream ThumbImageToStream(string SourceFile, int intThumbWidth, int intThumbHeight, bool gap = true)
{
MemoryStream ms = new MemoryStream();
//原图加载
using (System.DrawingCore.Image sourceImage = System.DrawingCore.Image.FromFile(SourceFile))
{
//是否显示原图
if (intThumbWidth == 0 && intThumbHeight == 0)
{
sourceImage.Save(ms, System.DrawingCore.Imaging.ImageFormat.Png);
return(ms);
}
//原图宽度和高度
int width = sourceImage.Width;
int height = sourceImage.Height;
int smallWidth;
int smallHeight;
//如果原图长宽均比缩略图的要小则返回原stream
if (width <= intThumbWidth && height <= intThumbHeight)
{
sourceImage.Save(ms, System.DrawingCore.Imaging.ImageFormat.Png);
return(ms);
}
//获取第一张绘制图的大小,(比较 原图的宽/缩略图的宽 和 原图的高/缩略图的高)
if (((decimal)width) / height <= ((decimal)intThumbWidth) / intThumbHeight)
{
smallWidth = intThumbHeight * width / height;
smallHeight = intThumbHeight;
}
else
{
smallWidth = intThumbWidth;
smallHeight = intThumbWidth * height / width;
}
Image newimg = sourceImage.GetThumbnailImage(smallWidth, smallHeight, null, IntPtr.Zero);
//使用原宽高比输出，不补足空白
if (!gap)
{
newimg.Save(ms, System.DrawingCore.Imaging.ImageFormat.Png);
return(ms);
}
//新建一个图板,以最小等比例压缩大小绘制原图
using (System.DrawingCore.Image bitmap = new System.DrawingCore.Bitmap(smallWidth, smallHeight))
{
//绘制中间图
using (System.DrawingCore.Graphics g = System.DrawingCore.Graphics.FromImage(bitmap))
{
//高清,平滑
g.InterpolationMode = System.DrawingCore.Drawing2D.InterpolationMode.High;
g.SmoothingMode = System.DrawingCore.Drawing2D.SmoothingMode.HighQuality;
g.Clear(Color.Transparent);
g.DrawImage(
sourceImage,
new System.DrawingCore.Rectangle(0, 0, smallWidth, smallHeight),
new System.DrawingCore.Rectangle(0, 0, width, height),
System.DrawingCore.GraphicsUnit.Pixel
);
}
//新建一个图板,以缩略图大小绘制中间图
using (System.DrawingCore.Image bitmap1 = new System.DrawingCore.Bitmap(intThumbWidth, intThumbHeight))
{
//绘制缩略图
using (System.DrawingCore.Graphics g = System.DrawingCore.Graphics.FromImage(bitmap1))
{
//高清,平滑
g.InterpolationMode = System.DrawingCore.Drawing2D.InterpolationMode.High;
g.SmoothingMode = System.DrawingCore.Drawing2D.SmoothingMode.HighQuality;
g.Clear(Color.Transparent);
int lwidth = (smallWidth - intThumbWidth) / 2;
int bheight = (smallHeight - intThumbHeight) / 2;
g.DrawImage(bitmap, new Rectangle(0, 0, intThumbWidth, intThumbHeight), lwidth, bheight, intThumbWidth, intThumbHeight, GraphicsUnit.Pixel);
g.Dispose();
bitmap1.Save(ms, System.DrawingCore.Imaging.ImageFormat.Png);
return(ms);
}
}
}
}
}
