public static void Run(TextWriter log, ComputeContext context)
{
StartTest(log, "Image test");
try
{
log.Write("Creating command queue... ");
ComputeCommandQueue commands = new ComputeCommandQueue(context, context.Devices[0], ComputeCommandQueueFlags.None);
log.WriteLine("done.");
int width = 16;
int height = 16;
log.Write("Creating first bitmap and drawing shapes... ");
Bitmap firstBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
Graphics graphics = Graphics.FromImage(firstBitmap);
graphics.FillEllipse(Brushes.Red, 0, 0, width / 2, height / 2);
graphics.FillRectangle(Brushes.Green, width / 2 + 1, 0, width / 2, height / 2);
graphics.FillRectangle(Brushes.Blue, width / 2 + 1, height / 2 + 1, width / 2, height / 2);
log.WriteLine("done.");
log.Write("Creating OpenCL image object from first bitmap... ");
ComputeImage2D clImage = new ComputeImage2D(context, ComputeMemoryFlags.ReadWrite | ComputeMemoryFlags.CopyHostPointer, firstBitmap);
log.WriteLine("done.");
log.Write("Creating second bitmap... ");
Bitmap secondBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
BitmapData bmpData = secondBitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, secondBitmap.PixelFormat);
log.WriteLine("done.");
log.Write("Reading from OpenCL image object... ");
commands.ReadFromImage(clImage, bmpData.Scan0, true, null);
log.WriteLine("done.");
secondBitmap.UnlockBits(bmpData);
log.Write("Comparing bitmaps... ");
for (int i = 0; i < width; i++)
for (int j = 0; j < height; j++)
if (firstBitmap.GetPixel(i, j) != secondBitmap.GetPixel(i, j))
throw new Exception("Image data mismatch!");
log.WriteLine("passed.");
}
catch (Exception e)
{
log.WriteLine(e.ToString());
}
EndTest(log, "Image test");
}
/// <summary>Unsafe allocation of memory</summary>
/// <param name="p">Pointer to data</param>
/// <param name="DataType">Data type: float, uint8 (byte), int32, etc.</param>
private unsafe void CLMalloc(void* p, ComputeImageChannelType DataType)
{
ComputeImageFormat format = new ComputeImageFormat(ComputeImageChannelOrder.Rgba, DataType);
if (OriginalVarLength != 4 * width * height) throw new Exception("Vector length should be 4*width*height");
VarPointer = new ComputeImage2D(Program.Context, ComputeMemoryFlags.ReadWrite | ComputeMemoryFlags.CopyHostPointer, format, width, height, 0, new IntPtr(p));
}
private void createSharedTexture()
{
// create a texture to render to.
_renderTextureID = createBlankTexture(ClientBounds);
// Create OpenCL image for kernel to write to
_renderTarget = ComputeImage2D.CreateFromGLTexture2D(_commandQueue.Context, ComputeMemoryFlags.ReadWrite, (int)TextureTarget.Texture2D, 0, _renderTextureID);
_sharedObjects.Add(_renderTarget);
}