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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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namespace KCOM.Common
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{
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public static class ImageSourceHelper
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{
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public static async System.Threading.Tasks.Task<BitmapImage> GetDownloadImageAsync(Uri uri, double pageWidth, double pageHeight)
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{
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System.Net.Http.HttpClient httpClient = null;
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System.IO.Stream responseStream = null;
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System.IO.MemoryStream memoryStream = null;
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BitmapImage image = null;
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try
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{
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using (httpClient = new System.Net.Http.HttpClient())
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{
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using (responseStream = await httpClient.GetStreamAsync(uri))
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{
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using (memoryStream = new System.IO.MemoryStream())
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{
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System.Diagnostics.Debug.WriteLine("이미지 다운로드");
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await responseStream.CopyToAsync(memoryStream);
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image = new BitmapImage();
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image.BeginInit();
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image.CacheOption = BitmapCacheOption.OnLoad;
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image.StreamSource = memoryStream;
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image.DecodePixelWidth = (int)pageWidth;
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image.DecodePixelHeight = (int)pageHeight;
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image.EndInit();
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image.Freeze();
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return image;
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}
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}
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}
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}
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catch (Exception ex)
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{
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throw new Exception("Image Load Error ", ex);
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}
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finally
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{
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httpClient?.Dispose();
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responseStream?.Dispose();
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memoryStream?.Dispose();
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image = null;
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}
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}
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public static byte[] CopyPixels(BitmapSource image)
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{
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byte[] result = new byte[image.PixelWidth * image.PixelHeight * 4];
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image.CopyPixels(result, image.PixelWidth * 4, 0);
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return result;
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}
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public static byte[] SetBrightness(int brightness, byte[] pixels)
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{
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for (int i = 0; i < pixels.Length / 4; ++i)
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{
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byte b = pixels[i * 4];
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byte g = pixels[i * 4 + 1];
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byte r = pixels[i * 4 + 2];
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byte a = pixels[i * 4 + 3];
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if (r != 255 || g != 255 || b != 255 || a == 255)
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{
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b = (byte)(b + brightness);
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g = (byte)(g + brightness);
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r = (byte)(r + brightness);
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///a = (byte)(a + brightness);
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if (r < 0) r = 1;
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if (r > 255) r = 255;
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if (g < 0) g = 1;
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if (g > 255) g = 255;
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if (b < 0) b = 1;
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if (b > 255) b = 255;
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pixels[i * 4] = b;
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pixels[i * 4 + 1] = g;
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pixels[i * 4 + 2] = r;
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}
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}
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return pixels;
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}
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public static byte[] SetBrightnessAndContrast(int brightness,double contrast, byte[] pixels)
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{
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System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
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stopwatch.Start();
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if (contrast < -100) contrast = -100;
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if (contrast > 100) contrast = 100;
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contrast = (100.0 + contrast) / 100.0;
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contrast *= contrast;
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for (int i = 0; i < pixels.Length / 4; ++i)
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{
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byte b = pixels[i * 4];
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byte g = pixels[i * 4 + 1];
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byte r = pixels[i * 4 + 2];
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byte a = pixels[i * 4 + 3];
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//System.Diagnostics.Debug.WriteLineIf(i< 4, $"B :{b} G : {g} r : {r}");
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if (r != 255 || g != 255 || b != 255)
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{
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b = (byte)(b + brightness);
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g = (byte)(g + brightness);
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r = (byte)(r + brightness);
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///a = (byte)(a + brightness);
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if (r < 0) r = 1;
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if (r > 255) r = 255;
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if (g < 0) g = 1;
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if (g > 255) g = 255;
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if (b < 0) b = 1;
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if (b > 255) b = 255;
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double pR = r / 255.0;
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pR -= 0.5;
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pR *= contrast;
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pR += 0.5;
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pR *= 255;
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if (pR < 0) pR = 0;
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if (pR > 255) pR = 255;
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double pG = g / 255.0;
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pG -= 0.5;
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pG *= contrast;
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pG += 0.5;
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pG *= 255;
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if (pG < 0) pG = 0;
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if (pG > 255) pG = 255;
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double pB = b / 255.0;
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pB -= 0.5;
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pB *= contrast;
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pB += 0.5;
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pB *= 255;
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if (pB < 0) pB = 0;
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if (pB > 255) pB = 255;
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pixels[i * 4] = (byte)pB;
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pixels[i * 4 + 1] = (byte)pG;
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pixels[i * 4 + 2] = (byte)pR;
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}
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}
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System.Diagnostics.Debug.WriteLine($"일반 : {stopwatch.Elapsed.ToString()}");
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return pixels;
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}
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public static byte[] SetBrightnessAndContrastLinp(int brightness, double contrast, byte[] pixels)
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{
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System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
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stopwatch.Start();
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if (contrast < -100) contrast = -100;
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if (contrast > 100) contrast = 100;
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contrast = (100.0 + contrast) / 100.0;
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contrast *= contrast;
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Parallel.ForEach(SteppedIntegerList(pixels,0, pixels.Length, 4,4),new ParallelOptions {MaxDegreeOfParallelism = 5 }, item=>
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{
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var pixel = item.ToList();
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byte b = pixel[0].Value;
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byte g = pixel[1].Value;
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byte r = pixel[2].Value;
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byte a = pixel[3].Value;
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//System.Diagnostics.Debug.WriteLineIf(pixel[0].Key < 4, $"B :{b} G : {g} r : {r}");
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if (r != 255 || g != 255 || b != 255)
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{
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b = (byte)(b + brightness);
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g = (byte)(g + brightness);
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r = (byte)(r + brightness);
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///a = (byte)(a + brightness);
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if (r < 0) r = 1;
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if (r > 255) r = 255;
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if (g < 0) g = 1;
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if (g > 255) g = 255;
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if (b < 0) b = 1;
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if (b > 255) b = 255;
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double pR = r / 255.0;
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pR -= 0.5;
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pR *= contrast;
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pR += 0.5;
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pR *= 255;
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if (pR < 0) pR = 0;
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if (pR > 255) pR = 255;
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double pG = g / 255.0;
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pG -= 0.5;
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pG *= contrast;
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pG += 0.5;
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pG *= 255;
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if (pG < 0) pG = 0;
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if (pG > 255) pG = 255;
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double pB = b / 255.0;
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pB -= 0.5;
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pB *= contrast;
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pB += 0.5;
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pB *= 255;
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if (pB < 0) pB = 0;
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if (pB > 255) pB = 255;
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pixels[pixel[0].Key] = (byte)pB;
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pixels[pixel[1].Key] = (byte)pG;
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pixels[pixel[2].Key] = (byte)pR;
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}
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});
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System.Diagnostics.Debug.WriteLine($"Linq : {stopwatch.Elapsed.ToString()}");
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241
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return pixels;
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}
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244
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public static IEnumerable<Dictionary<int,T>> SteppedIntegerList<T>(T[] array, int startIndex,int endEndex, int stepSize,int TakeSize)
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{
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for (int i = startIndex; i < endEndex; i += stepSize)
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{
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Dictionary<int, T> result = new Dictionary<int, T>();
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for (int j = 0; j < TakeSize; j++)
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{
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result.Add(j, array[i + j]);
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}
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255
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yield return result;
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}
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}
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259
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260
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public static byte[] SetContrast(double contrast, byte[] pixels)
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{
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if (contrast < -100) contrast = -100;
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if (contrast > 100) contrast = 100;
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contrast = (100.0 + contrast) / 100.0;
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contrast *= contrast;
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266
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267
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for (int i = 0; i < pixels.Length / 4; ++i)
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{
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byte b = pixels[i * 4];
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270
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byte g = pixels[i * 4 + 1];
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byte r = pixels[i * 4 + 2];
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byte a = pixels[i * 4 + 3];
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273
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274
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if (r != 255 || g != 255 || b != 255 || a == 255)
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275
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{
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276
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double pR = r / 255.0;
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pR -= 0.5;
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278
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pR *= contrast;
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pR += 0.5;
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pR *= 255;
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281
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if (pR < 0) pR = 0;
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282
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if (pR > 255) pR = 255;
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283
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284
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double pG = g / 255.0;
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pG -= 0.5;
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pG *= contrast;
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pG += 0.5;
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pG *= 255;
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289
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if (pG < 0) pG = 0;
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290
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if (pG > 255) pG = 255;
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291
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292
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double pB = b / 255.0;
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pB -= 0.5;
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294
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pB *= contrast;
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295
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pB += 0.5;
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pB *= 255;
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297
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if (pB < 0) pB = 0;
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298
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if (pB > 255) pB = 255;
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299
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300
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pixels[i * 4] = (byte)pB;
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pixels[i * 4 + 1] = (byte)pG;
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pixels[i * 4 + 2] = (byte)pR;
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303
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}
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304
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}
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305
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306
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return pixels;
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307
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}
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308
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}
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309
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}
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