本文整理汇总了C#中System.Drawing.Imaging.ImageAttributes.Dispose方法的典型用法代码示例。如果您正苦于以下问题：C# ImageAttributes.Dispose方法的具体用法？C# ImageAttributes.Dispose怎么用？C# ImageAttributes.Dispose使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Drawing.Imaging.ImageAttributes的用法示例。
在下文中一共展示了ImageAttributes.Dispose方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: DrawBackgroundImage
public static void DrawBackgroundImage(Graphics g, Image backgroundImage, Color backColor, ImageLayout backgroundImageLayout, Rectangle bounds, Rectangle clipRect, Point scrollOffset, RightToLeft rightToLeft)
{
if (g == null)
{
throw new ArgumentNullException("g");
}
if (backgroundImageLayout == ImageLayout.Tile)
{
using (TextureBrush brush = new TextureBrush(backgroundImage, WrapMode.Tile))
{
if (scrollOffset != Point.Empty)
{
Matrix transform = brush.Transform;
transform.Translate((float) scrollOffset.X, (float) scrollOffset.Y);
brush.Transform = transform;
}
g.FillRectangle(brush, clipRect);
return;
}
}
Rectangle rect = CalculateBackgroundImageRectangle(bounds, backgroundImage, backgroundImageLayout);
if ((rightToLeft == RightToLeft.Yes) && (backgroundImageLayout == ImageLayout.None))
{
rect.X += clipRect.Width - rect.Width;
}
using (SolidBrush brush2 = new SolidBrush(backColor))
{
g.FillRectangle(brush2, clipRect);
}
if (!clipRect.Contains(rect))
{
if ((backgroundImageLayout == ImageLayout.Stretch) || (backgroundImageLayout == ImageLayout.Zoom))
{
rect.Intersect(clipRect);
g.DrawImage(backgroundImage, rect);
}
else if (backgroundImageLayout == ImageLayout.None)
{
rect.Offset(clipRect.Location);
Rectangle destRect = rect;
destRect.Intersect(clipRect);
Rectangle rectangle3 = new Rectangle(Point.Empty, destRect.Size);
g.DrawImage(backgroundImage, destRect, rectangle3.X, rectangle3.Y, rectangle3.Width, rectangle3.Height, GraphicsUnit.Pixel);
}
else
{
Rectangle rectangle4 = rect;
rectangle4.Intersect(clipRect);
Rectangle rectangle5 = new Rectangle(new Point(rectangle4.X - rect.X, rectangle4.Y - rect.Y), rectangle4.Size);
g.DrawImage(backgroundImage, rectangle4, rectangle5.X, rectangle5.Y, rectangle5.Width, rectangle5.Height, GraphicsUnit.Pixel);
}
}
else
{
ImageAttributes imageAttr = new ImageAttributes();
imageAttr.SetWrapMode(WrapMode.TileFlipXY);
g.DrawImage(backgroundImage, rect, 0, 0, backgroundImage.Width, backgroundImage.Height, GraphicsUnit.Pixel, imageAttr);
imageAttr.Dispose();
}
}示例2: AdjustBrightness
public static Bitmap AdjustBrightness(this Image Image, Color contrastMultiplier, Color brightnessBonus)
{
var TempBitmap = Image;
var NewBitmap = new Bitmap(TempBitmap.Width, TempBitmap.Height);
var NewGraphics = Graphics.FromImage(NewBitmap);
float[][] FloatColorMatrix = {
new[] { contrastMultiplier.R/255.0f, 0, 0, 0, 0 }, new[] { 0, contrastMultiplier.G/255.0f, 0, 0, 0 },
new[] { 0, 0, contrastMultiplier.B/255.0f, 0, 0 }, new float[] { 0, 0, 0, 1, 0 },
new[] { brightnessBonus.R/255.0f, brightnessBonus.G/255.0f, brightnessBonus.B/255.0f, 1, 1 }
};
var NewColorMatrix = new ColorMatrix(FloatColorMatrix);
var Attributes = new ImageAttributes();
Attributes.SetColorMatrix(NewColorMatrix);
NewGraphics.DrawImage(TempBitmap,
new Rectangle(0, 0, TempBitmap.Width, TempBitmap.Height),
0,
0,
TempBitmap.Width,
TempBitmap.Height,
GraphicsUnit.Pixel,
Attributes);
Attributes.Dispose();
NewGraphics.Dispose();
return NewBitmap;
}示例3: Set
public static Image Set(Image image, float opacity)
{
Bitmap bmp = new Bitmap(image.Width, image.Height);
Graphics gfx = Graphics.FromImage(bmp);
ColorMatrix cmx = new ColorMatrix();
cmx.Matrix33 = opacity;
ImageAttributes ia = new ImageAttributes();
ia.SetColorMatrix(cmx, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
gfx.DrawImage(image, new Rectangle(0, 0, bmp.Width, bmp.Height), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, ia);
ia.Dispose();
gfx.Dispose();
return bmp;
}示例4: ApplyColorMatrix
private static void ApplyColorMatrix(Bitmap b , ref ColorMatrix matrix)
{
ImageAttributes ImgAtt = new ImageAttributes();
//Bitmap bmpMatrix=new Bitmap(b.Width, b.Height);
Graphics grMatrix = Graphics.FromImage(b);
ImgAtt.SetColorMatrix(matrix);
grMatrix.DrawImage(b, new Rectangle(0, 0, b.Width, b.Height), 0, 0, b.Width, b.Height, GraphicsUnit.Pixel, ImgAtt);
//b = bmpMatrix;
grMatrix.Dispose();
ImgAtt.Dispose();
}示例5: AdjustBrightness
public static Bitmap AdjustBrightness(Bitmap Image, int Value)
{
Bitmap TempBitmap = Image;
float FinalValue = (float)Value / 255.0f;
Bitmap NewBitmap = new Bitmap(TempBitmap.Width, TempBitmap.Height);
Graphics NewGraphics = Graphics.FromImage(NewBitmap);
float[][] FloatColorMatrix = {
new float[] {1, 0, 0, 0, 0},
new float[] {0, 1, 0, 0, 0},
new float[] {0, 0, 1, 0, 0},
new float[] {0, 0, 0, 1, 0},
new float[] {FinalValue, FinalValue, FinalValue, 1, 1}
};
ColorMatrix NewColorMatrix = new ColorMatrix(FloatColorMatrix);
ImageAttributes Attributes = new ImageAttributes();
Attributes.SetColorMatrix(NewColorMatrix);
NewGraphics.DrawImage(TempBitmap, new Rectangle(0, 0, TempBitmap.Width, TempBitmap.Height), 0, 0, TempBitmap.Width, TempBitmap.Height, GraphicsUnit.Pixel, Attributes);
Attributes.Dispose();
NewGraphics.Dispose();
return NewBitmap;
}示例6: DrawImageColorized
private static void DrawImageColorized(Graphics graphics, Image image, Rectangle destination, ColorMatrix matrix)
{
if (graphics == null)
{
throw new ArgumentNullException("graphics");
}
ImageAttributes imageAttrs = new ImageAttributes();
imageAttrs.SetColorMatrix(matrix);
graphics.DrawImage(image, destination, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, imageAttrs, null, IntPtr.Zero);
imageAttrs.Dispose();
}示例7: MakeTransparent
private static void MakeTransparent(string p)
{
FileStream fs = new FileStream(p, FileMode.Open, FileAccess.Read);
MemoryStream ms = new MemoryStream();
fs.CopyTo(ms);
ms.Position = 0;
fs.Close();
using (Image original = new Bitmap(ms))
{
using (Bitmap image = new Bitmap(original.Width, original.Height, PixelFormat.Format32bppArgb))
{
Graphics g = Graphics.FromImage(image);
ImageAttributes ia = new ImageAttributes();
ia.SetColorKey(Color.FromArgb(0, 0xde, 0), Color.FromArgb(33, 255, 5));
g.DrawImage(
original,
new Rectangle(0, 0, original.Width, original.Height),
0,
0,
original.Width,
original.Height,
GraphicsUnit.Pixel,
ia);
image.Save(p, ImageFormat.Png);
g.Dispose();
ia.Dispose();
}
}
}示例8: AddImageSignPic
//.........这里部分代码省略.........
int y = 0;
switch (watermarkStatus)
{
case 1:
x = (int) (img.Width * 0.01f);
y = (int) (img.Height * 0.01f);
break;
case 2:
x = ((int) (img.Width * 0.5f)) - (image.Width / 2);
y = (int) (img.Height * 0.01f);
break;
case 3:
x = ((int) (img.Width * 0.99f)) - image.Width;
y = (int) (img.Height * 0.01f);
break;
case 4:
x = (int) (img.Width * 0.01f);
y = ((int) (img.Height * 0.5f)) - (image.Height / 2);
break;
case 5:
x = ((int) (img.Width * 0.5f)) - (image.Width / 2);
y = ((int) (img.Height * 0.5f)) - (image.Height / 2);
break;
case 6:
x = ((int) (img.Width * 0.99f)) - image.Width;
y = ((int) (img.Height * 0.5f)) - (image.Height / 2);
break;
case 7:
x = (int) (img.Width * 0.01f);
y = ((int) (img.Height * 0.99f)) - image.Height;
break;
case 8:
x = ((int) (img.Width * 0.5f)) - (image.Width / 2);
y = ((int) (img.Height * 0.99f)) - image.Height;
break;
case 9:
x = ((int) (img.Width * 0.99f)) - image.Width;
y = ((int) (img.Height * 0.99f)) - image.Height;
break;
}
graphics.DrawImage(image, new Rectangle(x, y, image.Width, image.Height), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, imageAttr);
ImageCodecInfo[] imageEncoders = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo encoder = null;
foreach (ImageCodecInfo info2 in imageEncoders)
{
if (info2.MimeType.IndexOf("jpeg") > -1)
{
encoder = info2;
}
}
EncoderParameters encoderParams = new EncoderParameters();
long[] numArray2 = new long[1];
if ((quality < 0) || (quality > 100))
{
quality = 80;
}
numArray2[0] = quality;
EncoderParameter parameter = new EncoderParameter(Encoder.Quality, numArray2);
encoderParams.Param[0] = parameter;
stream = new MemoryStream();
if (encoder != null)
{
img.Save(stream, encoder, encoderParams);
}
stream2 = stream;
}
catch
{
stream = null;
stream2 = stream;
}
finally
{
if (graphics != null)
{
graphics.Dispose();
}
if (img != null)
{
img.Dispose();
}
if (image != null)
{
image.Dispose();
}
if (imageAttr != null)
{
imageAttr.Dispose();
}
}
return stream2;
}示例9: ImageWaterMarkPic
//.........这里部分代码省略.........
//设置高质量,低速度呈现平滑程度
//g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
if (watermark.Height >= sourceImg.Height || watermark.Width >= sourceImg.Width)
throw new Exception("水印图片大于原图");
ImageAttributes imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
float transparency = 0.5F;
if (watermarkTransparency >= 1 && watermarkTransparency <= 10)
transparency = (watermarkTransparency / 10.0F);
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, transparency, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int xpos = 0;
int ypos = 0;
switch (watermarkStatus)
{
case 1:
xpos = (int)(sourceImg.Width * (float).01);
ypos = (int)(sourceImg.Height * (float).01);
break;
case 2:
xpos = (int)((sourceImg.Width * (float).50) - (watermark.Width / 2));
ypos = (int)(sourceImg.Height * (float).01);
break;
case 3:
xpos = (int)((sourceImg.Width * (float).99) - (watermark.Width));
ypos = (int)(sourceImg.Height * (float).01);
break;
case 4:
xpos = (int)(sourceImg.Width * (float).01);
ypos = (int)((sourceImg.Height * (float).50) - (watermark.Height / 2));
break;
case 5:
xpos = (int)((sourceImg.Width * (float).50) - (watermark.Width / 2));
ypos = (int)((sourceImg.Height * (float).50) - (watermark.Height / 2));
break;
case 6:
xpos = (int)((sourceImg.Width * (float).99) - (watermark.Width));
ypos = (int)((sourceImg.Height * (float).50) - (watermark.Height / 2));
break;
case 7:
xpos = (int)(sourceImg.Width * (float).01);
ypos = (int)((sourceImg.Height * (float).99) - watermark.Height);
break;
case 8:
xpos = (int)((sourceImg.Width * (float).50) - (watermark.Width / 2));
ypos = (int)((sourceImg.Height * (float).99) - watermark.Height);
break;
case 9:
xpos = (int)((sourceImg.Width * (float).99) - (watermark.Width));
ypos = (int)((sourceImg.Height * (float).99) - watermark.Height);
break;
}
g.DrawImage(watermark, new Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes);
ImageCodecInfo ici = SunImgFormat.GetImageCodecInfo(imgExt);
EncoderParameters encoderParams = new EncoderParameters();
long[] qualityParam = new long[1];
if (quality < 0 || quality > 100)
quality = 80;
qualityParam[0] = quality;
EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam;
MemoryStream newMS = new MemoryStream();
if (ici != null)
sourceImg.Save(newMS, ici, encoderParams);
else
sourceImg.Save(newMS,tFormat);
watermarkImg.Dispose();//释放资源
sourceImgMS.Dispose();//释放资源
g.Dispose();
sourceImg.Dispose();
watermark.Dispose();
imageAttributes.Dispose();
return newMS;
}示例10: ResizeImage
/// <summary>
/// Resizes the specified image to the specifed size.
/// </summary>
/// <param name="image">The image to resize.</param>
/// <param name="width">The width in pixels of the resized image.</param>
/// <param name="height">The height in pixels of the resized image.</param>
/// <param name="dispose">The value indicating whether to dispose the specified image after returning the new resized bitmap.</param>
/// <returns>The specifed image, resized to the specified size.</returns>
/// <exception cref="System.ArgumentNullException">
/// Thrown when 'image' is null.
/// </exception>
/// <exception cref="System.ArgumentOutOfRangeException">
/// Thrown when 'width' is less than 0.
/// - OR -
/// Thrown when 'height' is less than 0.
/// </exception>
public static Bitmap ResizeImage(Image image, int width, int height, bool dispose = true)
{
// http://stackoverflow.com/questions/1922040/resize-an-image-c-sharp
if (image == null)
throw new ArgumentNullException(nameof(image));
if (width < 0)
throw new ArgumentOutOfRangeException(nameof(width), width, "'" + nameof(width) + "' cannot be less than 0.");
if (height < 0)
throw new ArgumentOutOfRangeException(nameof(height), height, "'" + nameof(height) + "' cannot be less than 0.");
Bitmap bitmap = new Bitmap(width, height);
Graphics graphics = Graphics.FromImage(bitmap);
ImageAttributes attributes = new ImageAttributes();
#region >> Sets settings for high quality resizing
bitmap.SetResolution(image.HorizontalResolution, image.VerticalResolution);
graphics.CompositingMode = CompositingMode.SourceCopy;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
attributes.SetWrapMode(WrapMode.TileFlipXY);
#endregion
graphics.DrawImage(image, new Rectangle(0, 0, width, height), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attributes);
if (dispose) image.Dispose();
graphics.Dispose();
attributes.Dispose();
return bitmap;
}示例11: SetGamma
/// <summary>
/// Redraw image into itself using the given gamma correction. 0.1 to 5.0 are allowed. 2.0 produces no change
/// </summary>
/// <param name="source"></param>
/// <param name="luminance"></param>
public static void SetGamma(Image source, float _gamma)
{
// clamp to range
float gamma = Math.Max(0.1f, Math.Min(_gamma, 5.0f));
// create image attributes
ImageAttributes ia = new ImageAttributes();
ia.SetGamma(gamma);
// get a graphics for source image
Graphics g = Graphics.FromImage(source);
// set compositing mode to copy over
g.CompositingMode = CompositingMode.SourceCopy;
// turn off aliasing etc
g.InterpolationMode = InterpolationMode.NearestNeighbor;
g.SmoothingMode = SmoothingMode.None;
// create destination rectangle
Rectangle d = new Rectangle(0, 0, source.Width, source.Height);
// paint into self
g.DrawImage(source, d, 0, 0, source.Width, source.Height, GraphicsUnit.Pixel, ia);
// cleanup
ia.Dispose();
g.Dispose();
}示例12: SetBrightness
/// <summary>
/// Uniformly scale RGB channels to change brightness. useful values are -1 to 1 with 0.0f
/// causing no change
/// </summary>
/// <param name="source"></param>
/// <param name="luminance"></param>
public static void SetBrightness(Image source, float bt)
{
// create image attributes
ImageAttributes ia = new ImageAttributes();
// create color matrix used to scale the channels
ColorMatrix cm = new ColorMatrix();
cm[0, 0] = 1.0f; cm[0, 1] = 0.0f; cm[0, 2] = 0.0f; cm[0, 3] = 0.0f; cm[0, 4] = 0.0f;
cm[1, 0] = 0.0f; cm[1, 1] = 1.0f; cm[1, 2] = 0.0f; cm[1, 3] = 0.0f; cm[1, 4] = 0.0f;
cm[2, 0] = 0.0f; cm[2, 1] = 0.0f; cm[2, 2] = 1.0f; cm[2, 3] = 0.0f; cm[2, 4] = 0.0f;
cm[3, 0] = 0.0f; cm[3, 1] = 0.0f; cm[3, 2] = 0.0f; cm[3, 3] = 1.0f; cm[3, 4] = 0.0f;
cm[4, 0] = bt; cm[4, 1] = bt; cm[4, 2] = bt; cm[4, 3] = 0.0f; cm[4, 4] = 1.0f;
// set matrix into attributes
ia.SetColorMatrix(cm);
// get a graphics for source image
Graphics g = Graphics.FromImage(source);
// set compositing mode to copy over
g.CompositingMode = CompositingMode.SourceCopy;
// turn off aliasing etc
g.InterpolationMode = InterpolationMode.NearestNeighbor;
g.SmoothingMode = SmoothingMode.None;
// create destination rectangle
Rectangle d = new Rectangle(0, 0, source.Width, source.Height);
// paint into self
g.DrawImage(source, d, 0, 0, source.Width, source.Height, GraphicsUnit.Pixel, ia);
// cleanup
ia.Dispose();
g.Dispose();
}示例13: GrayScaleImage
public static void GrayScaleImage(Image source, float lum)
{
// create image attributes to blit image into itself with.
ImageAttributes ia = new ImageAttributes();
// create gray scale color matrix that will also translate colors according to brightness.
// NOTE: The alpha translate is 0.0 so that transparent pixels will be unaffected.
ColorMatrix cm = new ColorMatrix();
cm[0, 0] = kR; cm[0, 1] = kR; cm[0, 2] = kR; cm[0, 3] = 0.0f; cm[0, 4] = 0.0f;
cm[1, 0] = kG; cm[1, 1] = kG; cm[1, 2] = kG; cm[1, 3] = 0.0f; cm[1, 4] = 0.0f;
cm[2, 0] = kB; cm[2, 1] = kB; cm[2, 2] = kB; cm[2, 3] = 0.0f; cm[2, 4] = 0.0f;
cm[3, 0] = 0.000f; cm[3, 1] = 0.000f; cm[3, 2] = 0.000f; cm[3, 3] = 1.0f; cm[3, 4] = 0.0f;
cm[4, 0] = lum; cm[4, 1] = lum; cm[4, 2] = lum; cm[4, 3] = 0.0f; cm[4, 4] = 1.0f;
// associate matrix with attributes
ia.SetColorMatrix(cm);
// get a graphics for source image
Graphics g = Graphics.FromImage(source);
// set compositing mode to copy over
g.CompositingMode = CompositingMode.SourceCopy;
// turn off aliasing etc
g.InterpolationMode = InterpolationMode.NearestNeighbor;
g.SmoothingMode = SmoothingMode.None;
// create destination rectangle
Rectangle d = new Rectangle(0, 0, source.Width, source.Height);
// paint into self
g.DrawImage(source, d, 0, 0, source.Width, source.Height, GraphicsUnit.Pixel, ia);
// cleanup
ia.Dispose();
g.Dispose();
}示例14: AddImageWatermark
//.........这里部分代码省略.........
g.DrawImage(img, 0, 0, img.Width, img.Height);
}
//设置高质量插值法
//g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
//g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Image watermark = new Bitmap(watermarkPath);
if (watermark.Height >= img.Height || watermark.Width >= img.Width)
{
try
{
return AddImageSignText(img, "易车网", watermarkStatus, 80, "Tahoma", 12);
}
catch (Exception)
{
}
}
ImageAttributes imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
float transparency = 0.5F;
if (watermarkTransparency >= 1 && watermarkTransparency <= 10)
{
transparency = (watermarkTransparency / 10.0F);
}
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, transparency, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int xpos = 0;
int ypos = 0;
switch (watermarkStatus)
{
case 1:
xpos = (int)(img.Width * (float).01);
ypos = (int)(img.Height * (float).01);
break;
case 2:
xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
ypos = (int)(img.Height * (float).01);
break;
case 3:
xpos = (int)((img.Width * (float).99) - (watermark.Width));
ypos = (int)(img.Height * (float).01);
break;
case 4:
xpos = (int)(img.Width * (float).01);
ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
break;
case 5:
xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
break;
case 6:
xpos = (int)((img.Width * (float).99) - (watermark.Width));
ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
break;
case 7:
xpos = (int)(img.Width * (float).01);
ypos = (int)((img.Height * (float).99) - watermark.Height);
break;
case 8:
xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
ypos = (int)((img.Height * (float).99) - watermark.Height);
break;
case 9:
xpos = (int)((img.Width * (float).99) - (watermark.Width));
ypos = (int)((img.Height * (float).99) - watermark.Height);
break;
}
g.DrawImage(watermark, new Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes);
MemoryStream s = new MemoryStream();
img.Save(s, GDI.GetEncoder(ImageFormat.Jpeg), GDI.LosslessParam);
g.Dispose();
img.Dispose();
watermark.Dispose();
imageAttributes.Dispose();
return s;
}示例15: ContrastTrackBar_Scroll
private void ContrastTrackBar_Scroll(object sender, EventArgs e)
{
contrast = 0.04f * ContrastTrackBar.Value;
Bitmap bmp = new Bitmap(picture.Width, picture.Height);
Graphics g = Graphics.FromImage(bmp);
ImageAttributes imageAttr = new ImageAttributes();
ColorMatrix cm = new ColorMatrix(new float[][] {
new float[]{contrast,0f,0f,0f,0f},
new float[]{0f,contrast,0f,0f,0f},
new float[]{0f,0f,contrast,0f,0f},
new float[]{0f,0f,0f,1f,0f},
new float[]{0.001f,0.001f,0.001f,0f,1f}});
imageAttr.SetColorMatrix(cm);
g.DrawImage(picture, new Rectangle(0, 0, picture.Width, picture.Height), 0, 0, picture.Width, picture.Height, GraphicsUnit.Pixel, imageAttr);
g.Dispose();
imageAttr.Dispose();
pictureBox1.Image = bmp;
SaveAction(bmp);
}