C# System.Drawing.Bitmap.MakeTransparent方法代码示例

		public PanRight()
		{
			string[] res = GetType().Assembly.GetManifestResourceNames();
			if(res.GetLength(0) > 0)
			{
				m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "PanRight.bmp"));
				if(m_bitmap != null)
				{
					m_bitmap.MakeTransparent(m_bitmap.GetPixel(1,1));
					m_hBitmap = m_bitmap.GetHbitmap();
				}
			}
			m_pHookHelper = new HookHelperClass ();
		}

 bool png2img(string inputFileName, string outputFileName) {
     tempFilesDeleter.AddFile(outputFileName);
     System.Drawing.Imaging.ImageFormat format;
     var extension = Path.GetExtension(outputFileName).ToLower();
     switch (extension) {
     case ".png":
         format = System.Drawing.Imaging.ImageFormat.Png;
         break;
     case ".jpg":
     case ".jpeg":
         format = System.Drawing.Imaging.ImageFormat.Jpeg;
         break;
     case ".gif":
         format = System.Drawing.Imaging.ImageFormat.Gif;
         break;
     case ".tif":
     case ".tiff":
         format = System.Drawing.Imaging.ImageFormat.Tiff;
         break;
     case ".bmp":
     default:
         format = System.Drawing.Imaging.ImageFormat.Bmp;
         break;
     }
     if (controller_ != null) controller_.appendOutput("TeX2img: Convert " + inputFileName + " to " + outputFileName + "\n");
     try {
         using (var bitmap = new System.Drawing.Bitmap(Path.Combine(workingDir, inputFileName))) {
             if (Properties.Settings.Default.transparentPngFlag && extension != ".gif") {
                 bitmap.MakeTransparent();
             }
             bitmap.Save(Path.Combine(workingDir, outputFileName), format);
         }
         return true;
     }
     catch (FileNotFoundException) { return false; }
     catch (UnauthorizedAccessException) { return false; }
 }

        protected void btnUpload_Click(object sender, EventArgs e)
        {
            if(flUploadReplace.HasFile) {
                try {
                    Extension = flUploadReplace.FileName.Substring(flUpload.FileName.LastIndexOf(".") + 1);
                    Extension = "png";
                    var fileName = (Server.MapPath(Folder) + FileName + "." + Extension);

                    //flUpload.SaveAs(fileName);
                    lblUplderr.Text = "<br>File size: " +
                            flUploadReplace.PostedFile.ContentLength + " kb<br>" +
                            "Content type: " +
                            flUploadReplace.PostedFile.ContentType;

                    var upImage = System.Drawing.Image.FromStream(flUploadReplace.PostedFile.InputStream);
                    // Get height and width of current image
                    int currWidth = (int)upImage.Width;
                    int currHeight = (int)upImage.Height;

                    Int32 newWidth = ImgWidth;
                    float ratio = 0;
                    Int32 newHeight = 0;
                    ratio = (float)currWidth / (float)newWidth;
                    newHeight = (int)(currHeight / ratio);

                    var newBmp = new System.Drawing.Bitmap(newWidth, newHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
                    newBmp.SetResolution(72, 72);
                    newBmp.MakeTransparent();
                    var newGraphic = System.Drawing.Graphics.FromImage(newBmp);

                    //newGraphic.Clear(Color.DarkRed);\

                    newGraphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                    newGraphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                    newGraphic.DrawImage(upImage, 0, 0, newWidth, newHeight);
                    newBmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);

                    newBmp.Dispose();
                    newGraphic.Dispose();

                    if(CreateSmallThumbnail) {
                        fileName = Server.MapPath(Folder) + "\\" + SmallThumbnailPrefix + FileName + "." + Extension;
                        newWidth = SmallThumbnailWidth;
                        ratio = (float)currWidth / (float)newWidth;
                        newHeight = (int)(currHeight / ratio);

                        newBmp = new System.Drawing.Bitmap(newWidth, newHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
                        newBmp.SetResolution(72, 72);
                        newBmp.MakeTransparent();
                        newGraphic = System.Drawing.Graphics.FromImage(newBmp);

                        //newGraphic.Clear(Color.DarkRed);
                        newGraphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                        newGraphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                        newGraphic.DrawImage(upImage, 0, 0, newWidth, newHeight);
                        newBmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);

                        newBmp.Dispose();
                        newGraphic.Dispose();

                    }

                    if(CreateMediumThumbnail) {
                        fileName = Server.MapPath(Folder) + "\\" + MediumThumbnailPrefix + FileName + "." + Extension;
                        newWidth = MediumThumbnailWidth;
                        ratio = (float)currWidth / (float)newWidth;
                        newHeight = (int)(currHeight / ratio);

                        newBmp = new System.Drawing.Bitmap(newWidth, newHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
                        newBmp.SetResolution(72, 72);
                        newBmp.MakeTransparent();
                        newGraphic = System.Drawing.Graphics.FromImage(newBmp);

                        //newGraphic.Clear(Color.DarkRed);
                        newGraphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                        newGraphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                        newGraphic.DrawImage(upImage, 0, 0, newWidth, newHeight);
                        newBmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);

                        newBmp.Dispose();
                        newGraphic.Dispose();

                    }

                    upImage.Dispose();

                    // resize
                    // thumb
                    // medium

                    ProcessRender();

                } catch(Exception ex) {
                    lblUplderr1.Text = "<br><font color=red>ERROR: " + ex.Message.ToString() + "</font>";
                }
            } else {
                lblUplderr1.Text = "<br><font color=red>ERROR: You have not specified a file.</font>";
            }
        }

            public SharpMap.Styles.IStyle GetStyle(SharpMap.Data.FeatureDataRow fdr)
            {
                var retval = new SharpMap.Styles.VectorStyle();

                if (fdr["Bearing"] == DBNull.Value)
                {
                    var bmp = new System.Drawing.Bitmap(36, 36);
                    using (var g = System.Drawing.Graphics.FromImage(bmp))
                    {
                        g.Clear(System.Drawing.Color.Wheat);
                        g.FillEllipse(System.Drawing.Brushes.Green, 0, 0, 36, 36);
                        g.DrawEllipse(new System.Drawing.Pen(System.Drawing.Brushes.Yellow, 3), 4, 4, 28, 28);
                        g.DrawString("H", new System.Drawing.Font("Arial", 18, System.Drawing.FontStyle.Bold),
                                     System.Drawing.Brushes.Yellow,
                                     new System.Drawing.RectangleF(2, 2, 34, 34),
                                     new System.Drawing.StringFormat
                                         {
                                             Alignment = System.Drawing.StringAlignment.Center,
                                             LineAlignment = System.Drawing.StringAlignment.Center
                                         });
                    }
                    bmp.MakeTransparent(System.Drawing.Color.Wheat);
                    retval.Symbol = bmp;
                }
                else
                {
                    retval.Symbol = ColoredArrow(_brush);
                    var rot =  (Single)(Double)fdr["Bearing"];
                    retval.SymbolRotation = rot % 360f;
                }
                return retval;

            }

            private static System.Drawing.Image ColoredArrow(System.Drawing.Brush c)
            {
                var bmp = new System.Drawing.Bitmap(13, 36);

                using (var g = System.Drawing.Graphics.FromImage(bmp))
                {
                    g.Clear(System.Drawing.Color.Wheat);
                    g.FillPolygon(c, ArrowPoints);
                    g.DrawPolygon(System.Drawing.Pens.Black, ArrowPoints);
                }

                bmp.MakeTransparent(System.Drawing.Color.Wheat);
                return bmp;
            }

        private void LoadImages()
        {
            string bmpPanName = "WpfChart.Resources.Breakpoint.bmp";

            System.IO.Stream strm = null;
            try
            {
                strm = this.GetType().Assembly.GetManifestResourceStream(bmpPanName);
                System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(strm);
                bitmap.MakeTransparent();
                IntPtr h_bm = bitmap.GetHbitmap();
                BitmapSource bms = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(h_bm, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
                panCursor = bms;

            }
            catch (Exception)
            {
                //Do nothing
            }
        }

        private byte[] RandomSymbol(int number)
        {
            number = number%360;
            string text ="";
            System.Drawing.Brush brush = null;
            if (number < 60)
                return null;
            if (number < 120)
            {
                text = "<120";
                brush = System.Drawing.Brushes.DarkGreen;
            }
            else if(number < 240)
            {
                text = number.ToString();
                brush = System.Drawing.Brushes.Orange;
            }
            else
            {
                text = ">240";
                brush = System.Drawing.Brushes.Red;
            }

            System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(120, 60);
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bmp);
            System.Drawing.RectangleF size = new System.Drawing.RectangleF(0f, 0f, 120f, 60f);
            g.FillRectangle(System.Drawing.Brushes.White, size);
            var sf = new System.Drawing.StringFormat(System.Drawing.StringFormatFlags.NoWrap)
                         {Alignment = System.Drawing.StringAlignment.Center};

            g.DrawString(text, new System.Drawing.Font("Arial", 24), brush, size, sf);
            g.Flush();
            g.Dispose();
            var ms = new System.IO.MemoryStream();
            bmp.MakeTransparent(System.Drawing.Color.White);
            bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
            return ms.ToArray();
        }

        private void HandleUpload(FileUpload fileControl)
        {
            if (fileControl.HasFile)
            {
                try
                {
                    Extension = fileControl.FileName.Substring(fileControl.FileName.LastIndexOf(".") + 1);
                    Extension = "png";
                    var fileName = (Server.MapPath(Folder) + FileName + "." + Extension);

                    lblUplderr.Text = "<br>File size: " +
                            fileControl.PostedFile.ContentLength + " kb<br>" +
                            "Content type: " +
                            fileControl.PostedFile.ContentType;

                    using (var upImage = System.Drawing.Image.FromStream(fileControl.PostedFile.InputStream))
                    {
                        // Get height and width of current image
                        int currWidth = (int)upImage.Width;
                        int currHeight = (int)upImage.Height;

                        Int32 newWidth = ImgWidth;
                        float ratio = 0;
                        Int32 newHeight = 0;
                        ratio = (float)currWidth / (float)newWidth;
                        newHeight = (int)(currHeight / ratio);


                        using (var newBmp = new System.Drawing.Bitmap(newWidth,
                            newHeight,
                            System.Drawing.Imaging.PixelFormat.Format24bppRgb))
                        {
                            newBmp.SetResolution(72, 72);
                            newBmp.MakeTransparent();
                            using (var newGraphic = System.Drawing.Graphics.FromImage(newBmp))
                            {
                                newGraphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
                                newGraphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                                newGraphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                                newGraphic.DrawImage(upImage, 0, 0, newWidth, newHeight);
                                newBmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);
                            }
                        }

                        if (CreateSmallThumbnail)
                        {
                            string thumbName = string.Format("{0}\\{1}{2}.{3}",
                                Server.MapPath(Folder),
                                SmallThumbnailPrefix,
                                FileName,
                                Extension);
                            CreateSquareImage(upImage, thumbName, SmallThumbnailWidth);
                        }

                        if (CreateMediumThumbnail)
                        {
                            string thumbName = string.Format("{0}\\{1}{2}.{3}",
                                Server.MapPath(Folder),
                                MediumThumbnailPrefix,
                                FileName,
                                Extension);
                            CreateSquareImage(upImage, thumbName, MediumThumbnailWidth);
                        }
                    }
                    ProcessRender();
                }
                catch (Exception ex)
                {
                    lblUplderr.Text = "<br><font color=red>ERROR: " + ex.Message.ToString() + "</font>";
                }
            }
            else {
                lblUplderr.Text = "<br><font color=red>ERROR: You have not specified a file.</font>";
            }

        }

		private void Form1_Load(object sender, System.EventArgs e)
		{
			//Load option/command button images
			System.Drawing.Bitmap bitmap1 = new System.Drawing.Bitmap (GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomIn.bmp"));
			bitmap1.MakeTransparent(System.Drawing.Color.Teal);
			optTool0.Image = bitmap1;
			System.Drawing.Bitmap bitmap2 = new System.Drawing.Bitmap (GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomOut.bmp"));
			bitmap2.MakeTransparent(System.Drawing.Color.Teal);
			optTool1.Image = bitmap2;
			System.Drawing.Bitmap bitmap3 = new System.Drawing.Bitmap (GetType().Assembly.GetManifestResourceStream(GetType(), "Pan.bmp"));
			bitmap3.MakeTransparent(System.Drawing.Color.Teal);
			optTool2.Image = bitmap3;		
			System.Drawing.Bitmap bitmap4 = new System.Drawing.Bitmap (GetType().Assembly.GetManifestResourceStream(GetType(), "FullExtent.bmp"));
			bitmap4.MakeTransparent(System.Drawing.Color.Teal);
			cmdFullExtent.Image = bitmap4;
			System.Drawing.Bitmap bitmap5 = new System.Drawing.Bitmap (GetType().Assembly.GetManifestResourceStream(GetType(), "UnDoDraw.bmp"));
			bitmap5.MakeTransparent(System.Drawing.Color.Teal);
			cmdUndo.Image = bitmap5;
			System.Drawing.Bitmap bitmap6 = new System.Drawing.Bitmap (GetType().Assembly.GetManifestResourceStream(GetType(), "ReDoDraw.bmp"));
			bitmap6.MakeTransparent(System.Drawing.Color.Teal);
			cmdRedo.Image = bitmap6;

			//Disable controls
			optTool0.Enabled = false;
			optTool1.Enabled = false;
			optTool2.Enabled = false;
			cmdUndo.Enabled = false;
			cmdRedo.Enabled = false;
			cmdFullExtent.Enabled = false;
		}

        private static void SaveQrCodeImage(Image image, string fileName)
        {
            Debug.Assert(image as Bitmap != null, "image as Bitmap != null");
            using (var memoryStream = new MemoryStream((image as Bitmap).ToByteArray(ImageFormat.Png))) {
                using (var bitmap = new System.Drawing.Bitmap(memoryStream)) {
                    bitmap.MakeTransparent(System.Drawing.Color.White);

                    using (var stream = new FileStream(fileName, FileMode.Create, FileAccess.ReadWrite, FileShare.None, 4096)) {
                        bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
                    }
                }
            }
        }

		/// <summary>
		/// Load default images for device tree.
		/// </summary>
		/// <param name="Images"></param>
		void LoadDefaultImages(ImageList.ImageCollection Images)
		{		
			System.Drawing.Bitmap bm = null;
			//Load device categories image
			System.IO.Stream stream = this.GetType().Assembly.GetManifestResourceStream("DLMS.Resources.DeviceCategories.bmp");
			if (stream != null)
			{
				bm = new System.Drawing.Bitmap(stream);
				bm.MakeTransparent();					
				Images.Add(bm);
			}

			//Load device category image
			stream = this.GetType().Assembly.GetManifestResourceStream("DLMS.Resources.DeviceCategory.bmp");
			if (stream != null)
			{
				bm = new System.Drawing.Bitmap(stream);
				bm.MakeTransparent(System.Drawing.Color.FromArgb(255, 0, 255));
				Images.Add(bm);
			}

			//Load device tables image
			stream = this.GetType().Assembly.GetManifestResourceStream("DLMS.Resources.DeviceTables.bmp");
			if (stream != null)
			{
				bm = new System.Drawing.Bitmap(stream);
				bm.MakeTransparent();					
				Images.Add(bm);
			}

			//Load device table image
			stream = this.GetType().Assembly.GetManifestResourceStream("DLMS.Resources.DeviceTable.bmp");
			if (stream != null)
			{
				bm = new System.Drawing.Bitmap(stream);
				bm.MakeTransparent();					
				Images.Add(bm);
			}

			//Load device properties image
			stream = this.GetType().Assembly.GetManifestResourceStream("DLMS.Resources.DeviceProperties.bmp");
			if (stream != null)
			{
				bm = new System.Drawing.Bitmap(stream);
				bm.MakeTransparent();					
				Images.Add(bm);
			}

			//Load device property image
			stream = this.GetType().Assembly.GetManifestResourceStream("DLMS.Resources.DeviceProperty.bmp");
			if (stream != null)
			{
				bm = new System.Drawing.Bitmap(stream);
				bm.MakeTransparent();					
				Images.Add(bm);
			}
			//Load None image
			stream = this.GetType().Assembly.GetManifestResourceStream("DLMS.Resources.DatabaseNone.bmp");
			if (stream != null)
			{
				bm = new System.Drawing.Bitmap(stream);
				bm.MakeTransparent();					
				Images.Add(bm);
			}
		}

        public static Cursor CreateCursor(UIElement element, int xHotSpot, int yHotSpot,bool isTransparent)
        {
            try
            {
                element.Measure(new Size(double.PositiveInfinity,
                                double.PositiveInfinity));
                element.Arrange(new Rect(0, 0, element.DesiredSize.Width,
                  element.DesiredSize.Height));

                RenderTargetBitmap rtb =
                  new RenderTargetBitmap((int)element.DesiredSize.Width,
                    (int)element.DesiredSize.Height, 96, 96,
                    PixelFormats.Pbgra32);
                rtb.Render(element);

                PngBitmapEncoder encoder = new PngBitmapEncoder();
                encoder.Frames.Add(BitmapFrame.Create(rtb));

                MemoryStream ms = new MemoryStream();
                encoder.Save(ms);

                System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(ms);



                if (isTransparent)
                {

                    System.Drawing.Color backColor = bmp.GetPixel(1, 1);
                    bmp.MakeTransparent(backColor);
                }



                Cursor cur = InternalCreateCursor(bmp, xHotSpot, yHotSpot);

                ms.Close();
                ms.Dispose();


                //VictorDEBUG
                bmp.Dispose();

                return cur;
            }
            catch
            {
            }
            return null;

        }

        public static BitmapSource CreateTransparentElement(UIElement element)
        {
            BitmapSource retBitmap = null;

            RenderTargetBitmap rtb = new RenderTargetBitmap((int)100,
                                    (int)50, 96, 96,
                                    PixelFormats.Pbgra32);
            rtb.Render(element);

            PngBitmapEncoder encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create(rtb));

            MemoryStream ms = new MemoryStream();
            encoder.Save(ms);

            System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(ms);
            System.Drawing.Color backColor = bmp.GetPixel(1, 1);
            bmp.MakeTransparent(backColor);

            retBitmap = loadBitmap(bmp);
            return retBitmap;

        }

 /// <summary>
 /// Returns an image from assembly resources.
 /// </summary>
 /// <param name="name">Name of the resource to create an image from. Should not include 
 ///   the task namespace.</param>
 /// <returns>An image</returns>
 private System.Drawing.Bitmap TaskImageFromName(string name)
 {
     // This utility function simply returns a bitmap from a name by retrieving
     // an assembly resource.
     try
     {
         string fullName = this.GetType().Namespace + ".Images." + name + ".png";
         System.Drawing.Bitmap image = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream(fullName));
         image.MakeTransparent(image.GetPixel(1, 1));
         return image;
     }
     catch (Exception ex)
     {
         System.Diagnostics.Debug.WriteLine(ex.ToString());
     }
     return null;
 }

		private void Form1_Load(object sender, System.EventArgs e)
		{
			System.Drawing.Bitmap bitmap1 = new System.Drawing.Bitmap (GetType().Assembly.GetManifestResourceStream(GetType(), "browse.bmp"));
			bitmap1.MakeTransparent(System.Drawing.Color.Teal);
			cmdLoad.Image = bitmap1;
			System.Drawing.Bitmap bitmap2 = new System.Drawing.Bitmap (GetType().Assembly.GetManifestResourceStream(GetType(), "properti.bmp"));
			bitmap2.MakeTransparent(System.Drawing.Color.Teal);
			cmdProperties.Image = bitmap2;
			cmdMapProperties.Image = bitmap2;
			chkTOC.Enabled = false;
		}