First Commit

StitchATon/Controller.cs

@@ -0,0 +1,98 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.ObjectPool;
+using OpenCvSharp;
+using StitchATon.DTO;
+using StitchATon.Services;
+using StitchATon.Utility;
+
+namespace StitchATon;
+
+[ApiController]
+[Route("api/image/")]
+public class ImageController( ImageProvider ip, ObjectPool<PngNamedPipe> npPool, ILogger<Controller> logger ) : ControllerBase
+{
+  [HttpPost]
+  [Route("generate")]
+  public async Task<IActionResult> GetImage([FromBody] GenerateInput generateInput)
+  {
+    logger.LogInformation( $"GetImage requested at {generateInput.CanvasRect}" );
+    
+    var namedPipe = npPool.Get();
+    var imagePath = namedPipe.PipeFullname;
+
+    using var roiIm = await ip.GetImage(
+      generateInput.ParsedCanvasRect(),
+      generateInput.ParsedCropOffset(),
+      generateInput.ParsedCropSize()
+      );
+    
+    var scaledSize = new Size(
+      roiIm.Cols * generateInput.OutputScale,
+      roiIm.Rows * generateInput.OutputScale
+    );
+    Mat resizedIm = new();
+    
+    if( scaledSize == roiIm.Size() )
+      resizedIm = roiIm;
+    else
+      Cv2.Resize( roiIm, resizedIm, scaledSize  );
+
+    // Spawn new task to write to the named pipe
+    Task.Run( () =>
+    {
+      Cv2.ImWrite( imagePath, resizedIm );
+      resizedIm.Dispose();
+    } );
+
+    // Stream the named pipe as output
+    var fileStream = new FileStream(
+      imagePath, 
+      FileMode.Open, 
+      FileAccess.Read, 
+      FileShare.Read, 
+      4096, 
+      FileOptions.Asynchronous | FileOptions.SequentialScan);
+    
+    return File(fileStream, "image/png");
+  }
+  
+  [HttpGet]
+  [Route("sanity")]
+  public async Task<IActionResult> GetImageSanityTest()
+  {
+    var namedPipe = npPool.Get();
+    var imagePath = namedPipe.PipeFullname;
+
+    using var roiIm = await ip.GetImage(
+      new Rect( new Point( 5, 6 ), new Size( 3, 3 ) ),
+      new Point2f( .1f, .1f ),
+      new Point2f( .8f, .8f ) );
+
+    var mul = .7;
+    var scaledSize = new Size(roiIm.Cols * mul , roiIm.Rows * mul);
+    Mat resizedIm = new();
+    
+    if( scaledSize == roiIm.Size() )
+      resizedIm = roiIm;
+    else
+      Cv2.Resize( roiIm, resizedIm, scaledSize  );
+
+    // Spawn new task to write to the named pipe
+    Task.Run( () =>
+    {
+      Cv2.ImWrite( imagePath, resizedIm );
+      resizedIm.Dispose();
+    } );
+
+    // Stream the named pipe as output
+    var fileStream = new FileStream(
+      imagePath, 
+      FileMode.Open, 
+      FileAccess.Read, 
+      FileShare.Read, 
+      4096, 
+      FileOptions.Asynchronous | FileOptions.SequentialScan);
+    
+    return File(fileStream, "image/png");
+  }
+}