/// <summary>
/// Reads image in JPEG format and saves to WebP format using memory-friendly Pipeline API
/// </summary>
private static void WriteWebPMemoryFriendly()
{
using (var reader = new JpegReader("../../../../_Input/Chicago.jpg"))
using (var writer = new WebPWriter("../../../../_Output/WriteWebPMemoryFriendly.webp"))
{
Pipeline.Run(reader + writer);
}
}
/// <summary>
/// Writes image in WebP lossy and lossless format
/// </summary>
private static void WriteWebPLossyAndLossless()
{
using (var reader = new JpegReader("../../../../_Input/Chicago.jpg"))
using (var writerLossy = new WebPWriter("../../../../_Output/WriteWebPLossy.webp"))
using (var writerLossless = new WebPWriter("../../../../_Output/WriteWebPLossless.webp"))
{
writerLossy.Quality = 85f;
Pipeline.Run(reader + writerLossy);
writerLossy.FrameOptions.Lossless = true;
Pipeline.Run(reader + writerLossless);
}
var lossy = new System.IO.FileInfo("../../../../_Output/WriteWebPLossy.webp");
var lossless = new System.IO.FileInfo("../../../../_Output/WriteWebPLossless.webp");
Console.WriteLine("Lossy WebP: {0} b", lossy.Length);
Console.WriteLine("Lossless WebP: {0} b", lossless.Length);
}
/// <summary>
/// Writes simple animated image in WebP format
/// </summary>
private static void WriteAnimatedWebP()
{
using (var writer = new WebPWriter("../../../../_Output/WriteAnimatedWebP.webp"))
{
writer.FrameOptions.Delay = 250;
for (int i = 0; i < 400; i += 25)
{
var bitmap = new Bitmap(400, 100, PixelFormat.Format24bppRgb, RgbColor.Yellow);
using (var graphics = bitmap.GetAdvancedGraphics())
{
graphics.FillEllipse(new SolidBrush(RgbColor.Green), new System.Drawing.RectangleF(i, 0, 100, 100));
}
Pipeline.Run(bitmap + writer);
}
}
}
/// <summary>
/// Compares compression of WebP, JPEG and PNG image formats
/// </summary>
private static void CompareImageFormatCompressions()
{
using (var reader = new JpegReader("../../../../_Input/Chicago.jpg"))
using (var writerWebP = new WebPWriter("../../../../_Output/CompareImageFormatCompressions.webp"))
using (var writerJpeg = new JpegWriter("../../../../_Output/CompareImageFormatCompressions.jpg"))
using (var writerPng = new PngWriter("../../../../_Output/CompareImageFormatCompressions.png"))
{
writerWebP.Quality = 90f;
writerJpeg.Quality = 90;
Pipeline.Run(reader + writerWebP);
Pipeline.Run(reader + writerJpeg);
Pipeline.Run(reader + writerPng);
}
var webpFile = new System.IO.FileInfo("../../../../_Output/CompareImageFormatCompressions.webp");
var jpegFile = new System.IO.FileInfo("../../../../_Output/CompareImageFormatCompressions.jpg");
var pngFile = new System.IO.FileInfo("../../../../_Output/CompareImageFormatCompressions.png");
Console.WriteLine("WebP: {0} b", webpFile.Length);
Console.WriteLine("JPEG: {0} b", jpegFile.Length);
Console.WriteLine("PNG: {0} b", pngFile.Length);
}
