static void BuildAtlasWithGPU(int thumbSize = 96, int dimension = 20)
{
using (var memBmp = new WicBitmapSource(thumbSize * dimension, thumbSize * dimension, WicPixelFormat.GUID_WICPixelFormat32bppPRGBA))
{
using (var dc = memBmp.CreateDeviceContext())
{
var row = 0;
var col = 0;
var path = @"d:\temp";
var sw = new Stopwatch();
sw.Start();
foreach (var file in Directory.EnumerateFiles(path, "*.*", SearchOption.TopDirectoryOnly))
{
var ext = Path.GetExtension(file);
if (!WicImagingComponent.DecoderFileExtensions.Contains(ext))
{
continue;
}
if (new FileInfo(file).Length < 32)
{
continue;
}
using (var bmp = WicBitmapSource.Load(file))
{
bmp.Scale(thumbSize, WICBitmapInterpolationMode.WICBitmapInterpolationModeFant);
if (bmp.PixelFormat != WicPixelFormat.GUID_WICPixelFormat32bppPRGBA)
{
bmp.ConvertTo(WicPixelFormat.GUID_WICPixelFormat32bppPRGBA);
}
using (var cb = dc.CreateBitmapFromWicBitmap(bmp.ComObject))
{
var dr = D2D_RECT_F.Sized(col * thumbSize, row * thumbSize, bmp.Width, bmp.Height);
dc.BeginDraw();
dc.DrawBitmap(cb, destinationRectangle: dr);
dc.EndDraw();
}
}
col++;
if (col > dimension)
{
col = 0;
row++;
}
}
Console.WriteLine(sw.Elapsed);
}
memBmp.Save("atlas.jpg");
}
}