public void singlePass(Kernel kernel, FloatMap inMap, FloatMap outMap)
{
var clInImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.Luminance, ChannelType.Float);
IMem inputMapBuffer = Cl.CreateImage2D(_context, MemFlags.CopyHostPtr | MemFlags.ReadOnly, clInImageFormat,
(IntPtr)inMap.W, (IntPtr)inMap.H, new IntPtr(inMap.Stride * sizeof(float)),
inMap._buf, out err);
assert(err, "input img creation");
IMem outputMapBuffer = Cl.CreateImage2D(_context, MemFlags.WriteOnly, clInImageFormat,
(IntPtr)outMap.W, (IntPtr)outMap.H, new IntPtr(outMap.Stride * sizeof(float)),
outMap._buf, out err);
assert(err, "output img creation");
// Set memory objects as parameters to kernel
err = Cl.SetKernelArg(kernel, 0, intPtrSize, inputMapBuffer);
assert(err, "input map setKernelArg");
err = Cl.SetKernelArg(kernel, 1, intPtrSize, outputMapBuffer);
assert(err, "output map setKernelArg");
// write actual data into memory object
IntPtr[] originPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 }; //x, y, z
IntPtr[] inRegionPtr = new IntPtr[] { (IntPtr)inMap.W, (IntPtr)inMap.H, (IntPtr)1 }; //x, y, z
IntPtr[] outRegionPtr = new IntPtr[] { (IntPtr)outMap.W, (IntPtr)outMap.H, (IntPtr)1 }; //x, y, z
IntPtr[] workGroupSizePtr = new IntPtr[] { (IntPtr)outMap.W, (IntPtr)outMap.H, (IntPtr)1 };
Event clevent;
//err = Cl.EnqueueWriteImage(_commandsQueue, inputMapBuffer, Bool.True, originPtr, inRegionPtr, (IntPtr)0, (IntPtr)0, inMap._buf, 0, null, out clevent);
//clevent.Dispose();
//assert(err, "write input img");
// execute
err = Cl.EnqueueNDRangeKernel(_commandsQueue, kernel, 2,
originPtr,
workGroupSizePtr,
null, 0, null, out clevent);
clevent.Dispose();
assert(err, "Cl.EnqueueNDRangeKernel");
// sync
Cl.Finish(_commandsQueue);
// read from output memory object into actual buffer
err = Cl.EnqueueReadImage(_commandsQueue, outputMapBuffer, Bool.True, originPtr, outRegionPtr, new IntPtr(outMap.Stride * sizeof(float)), (IntPtr)0, outMap._buf, 0, null, out clevent);
clevent.Dispose();
assert(err, "read output buffer");
Cl.ReleaseMemObject(inputMapBuffer);
Cl.ReleaseMemObject(outputMapBuffer);
}
public Event EnqueueWriteImage(Image image, bool blocking,
Ibasa.Numerics.Vector3ul origin,
Ibasa.Numerics.Vector3ul region,
ulong rowPitch, ulong slicePitch,
IntPtr source, Event[] events)
{
ClHelper.ThrowNullException(Handle);
if (image == Image.Null)
{
throw new ArgumentNullException("image");
}
if (source == IntPtr.Zero)
{
throw new ArgumentNullException("source");
}
unsafe
{
int num_events_in_wait_list = events == null ? 0 : events.Length;
IntPtr *wait_list = stackalloc IntPtr[num_events_in_wait_list];
for (int i = 0; i < num_events_in_wait_list; ++i)
{
wait_list[i] = events[i].Handle;
}
if (events == null)
{
wait_list = null;
}
IntPtr event_ptr = IntPtr.Zero;
UIntPtr *origin_ptr = stackalloc UIntPtr[3];
origin_ptr[0] = new UIntPtr(origin.X);
origin_ptr[1] = new UIntPtr(origin.Y);
origin_ptr[2] = new UIntPtr(origin.Z);
UIntPtr *region_ptr = stackalloc UIntPtr[3];
region_ptr[0] = new UIntPtr(region.X);
region_ptr[1] = new UIntPtr(region.Y);
region_ptr[2] = new UIntPtr(region.Z);
ClHelper.GetError(Cl.EnqueueReadImage(Handle, image.Handle,
blocking ? 1u : 0u, origin_ptr, region_ptr, new UIntPtr(rowPitch), new UIntPtr(slicePitch),
source.ToPointer(), (uint)num_events_in_wait_list, wait_list, &event_ptr));
return(new Event(event_ptr));
}
}
public override Bitmap Plot()
{
ErrorCode error;
using (Kernel kernel = CompileKernel("mandelbrot"))
{
Bitmap plotImg = new Bitmap(Width, Height);
int intPtrSize = Marshal.SizeOf(typeof(IntPtr));
int uint4size = Marshal.SizeOf(typeof(uint4));
// Buffer do OpenCL para manter os dados da imagem
OpenCL.Net.ImageFormat clImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Unsigned_Int8);
//// Obtém o buffer de pixels
//BitmapData data = plotImg.LockBits(new Rectangle(0, 0, plotImg.Width, plotImg.Height), ImageLockMode.WriteOnly, plotImg.PixelFormat);
//int depth = Bitmap.GetPixelFormatSize(data.PixelFormat) / 8; // Tamanho de cada pixel em memória, em bytes
int depth = Bitmap.GetPixelFormatSize(PixelFormat.Format32bppArgb) / 8;
int stride = 4 * ((Width * depth + 3) / 4);
byte[] buffer = new byte[Height * stride]; // Cria o buffer para se trabalhar na imagem
//Marshal.Copy(data.Scan0, buffer, 0, buffer.Length); // Copia as informações da imagem no buffer
// Cria o buffer do OpenCL para a imagem
Mem image2dbuffer = (Mem)Cl.CreateImage2D(context, MemFlags.CopyHostPtr | MemFlags.WriteOnly, clImageFormat,
(IntPtr)Width, (IntPtr)Height,
(IntPtr)0, buffer, out error);
CheckErr(error, "Cl.CreateImage2D");
// Passa os parametros para o kernel
error = Cl.SetKernelArg(kernel, 0, (IntPtr)intPtrSize, image2dbuffer);
CheckErr(error, "Cl.SetKernelArg imageBuffer");
uint4 startColorUi = new uint4(Colors.StartColor.B, Colors.StartColor.G, Colors.StartColor.R, Colors.StartColor.A);
error = Cl.SetKernelArg(kernel, 1, (IntPtr)uint4size, startColorUi);
CheckErr(error, "Cl.SetKernelArg startColor");
uint4 endColorUi = new uint4(Colors.EndColor.B, Colors.EndColor.G, Colors.EndColor.R, Colors.EndColor.A);
error = Cl.SetKernelArg(kernel, 2, (IntPtr)uint4size, endColorUi);
CheckErr(error, "Cl.SetKernelArg endColor");
error = Cl.SetKernelArg(kernel, 3, (IntPtr)sizeof(int), Iterations);
CheckErr(error, "Cl.SetKernelArg iterations");
// Cria uma fila de comandos, com todos os comandos a serem executados pelo kernel
CommandQueue cmdQueue = Cl.CreateCommandQueue(context, device, 0, out error);
CheckErr(error, "Cl.CreateCommandQueue");
// Copia a imagem para a GPU
Event clevent;
IntPtr[] imgOriginPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 }; //x, y, z
IntPtr[] imgRegionPtr = new IntPtr[] { (IntPtr)Width, (IntPtr)Height, (IntPtr)1 }; //x, y, z
error = Cl.EnqueueWriteImage(cmdQueue, image2dbuffer, Bool.True, imgOriginPtr, imgRegionPtr, (IntPtr)0, (IntPtr)0, buffer, 0, null, out clevent);
CheckErr(error, "Cl.EnqueueWriteImage");
// Executa o Kernel carregado pelo OpenCL (com múltiplos processadores :D)
IntPtr[] workGroupSizePtr = new IntPtr[] { (IntPtr)Width, (IntPtr)Height, (IntPtr)1 }; // x, y, z
error = Cl.EnqueueNDRangeKernel(cmdQueue, kernel, 2, null, workGroupSizePtr, null, 0, null, out clevent);
CheckErr(error, "Cl.EnqueueNDRangeKernel");
// Espera terminar a execução
error = Cl.Finish(cmdQueue);
CheckErr(error, "Cl.Finish");
// Lê a imagem processada pela GPU e coloca novamente no buffer
error = Cl.EnqueueReadImage(cmdQueue, image2dbuffer, Bool.True, imgOriginPtr, imgRegionPtr,
(IntPtr)0, (IntPtr)0, buffer, 0, null, out clevent);
CheckErr(error, "Cl.clEnqueueReadImage");
// Limpa a memória
Cl.ReleaseKernel(kernel);
Cl.ReleaseCommandQueue(cmdQueue);
Cl.ReleaseMemObject(image2dbuffer);
// Get a pointer to our unmanaged output byte[] array
//GCHandle pinnedBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
//IntPtr bmpPointer = pinnedBuffer.AddrOfPinnedObject();
BitmapData data = plotImg.LockBits(new Rectangle(0, 0, plotImg.Width, plotImg.Height), ImageLockMode.WriteOnly, plotImg.PixelFormat);
Marshal.Copy(buffer, 0, data.Scan0, buffer.Length); // Copia as informações no buffer de volta à imagem
plotImg.UnlockBits(data); // Libera a imagem
//pinnedBuffer.Free();
return(plotImg);
}
}
public HTTPResponse GetResponse(HTTPRequest request)
{
HTTPResponse response = new HTTPResponse(200);
StringBuilder sb = new StringBuilder();
ErrorCode error;
if (!_isInit)
{
init();
_isInit = true;
}
if (request.Method == HTTPRequest.METHOD_GET)
{
// Input form, this can be place by any HTML page
sb.Append("<html><body>");
sb.Append(GenUploadForm());
sb.Append("</body></html>");
response.Body = Encoding.UTF8.GetBytes(sb.ToString());
return(response);
}
else if (request.Method == HTTPRequest.METHOD_POST)
{
// Get remote image from URL
string url = Uri.UnescapeDataString(request.GetRequestByKey("imageUploadUrl"));
byte[] data;
try {
data = DownloadImageFromUrl(url);
} catch (Exception) {
return(new HTTPResponse(400));
}
// https://www.codeproject.com/Articles/502829/GPGPU-image-processing-basics-using-OpenCL-NET
// Convert image to bitmap binary
Image inputImage = Image.FromStream(new MemoryStream(data));
if (inputImage == null)
{
return(new HTTPResponse(500));
}
int imagewidth = inputImage.Width;
int imageHeight = inputImage.Height;
Bitmap bmpImage = new Bitmap(inputImage);
BitmapData bitmapData = bmpImage.LockBits(new Rectangle(0, 0, bmpImage.Width, bmpImage.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
int inputImageByteSize = bitmapData.Stride * bitmapData.Height;
byte[] inputByteArray = new byte[inputImageByteSize];
Marshal.Copy(bitmapData.Scan0, inputByteArray, 0, inputImageByteSize);
// Load kernel source code
string programPath = System.Environment.CurrentDirectory + "/Kernel.cl";
if (!System.IO.File.Exists(programPath))
{
return(new HTTPResponse(404));
}
string programSource = System.IO.File.ReadAllText(programPath);
using (OpenCL.Net.Program program = Cl.CreateProgramWithSource(_context, 1, new[] { programSource }, null, out error)) {
// Create kernel
LogError(error, "Cl.CreateProgramWithSource");
error = Cl.BuildProgram(program, 1, new[] { _device }, string.Empty, null, IntPtr.Zero);
LogError(error, "Cl.BuildProgram");
if (Cl.GetProgramBuildInfo(program, _device, ProgramBuildInfo.Status, out error).CastTo <OpenCL.Net.BuildStatus>()
!= BuildStatus.Success)
{
LogError(error, "Cl.GetProgramBuildInfo");
return(new HTTPResponse(404));
}
Kernel kernel = Cl.CreateKernel(program, _parameters["KernelFunction"], out error);
LogError(error, "Cl.CreateKernel");
// Create image memory objects
OpenCL.Net.ImageFormat clImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Unsigned_Int8);
IMem inputImage2DBuffer = Cl.CreateImage2D(_context, MemFlags.CopyHostPtr | MemFlags.ReadOnly,
clImageFormat, (IntPtr)bitmapData.Width, (IntPtr)bitmapData.Height,
(IntPtr)0, inputByteArray, out error);
LogError(error, "CreateImage2D input");
byte[] outputByteArray = new byte[inputImageByteSize];
IMem outputImage2DBuffer = Cl.CreateImage2D(_context, MemFlags.CopyHostPtr | MemFlags.WriteOnly,
clImageFormat, (IntPtr)bitmapData.Width, (IntPtr)bitmapData.Height,
(IntPtr)0, outputByteArray, out error);
LogError(error, "CreateImage2D output");
// Set arguments
int IntPtrSize = Marshal.SizeOf(typeof(IntPtr));
error = Cl.SetKernelArg(kernel, 0, (IntPtr)IntPtrSize, inputImage2DBuffer);
error |= Cl.SetKernelArg(kernel, 1, (IntPtr)IntPtrSize, outputImage2DBuffer);
LogError(error, "Cl.SetKernelArg");
// Create command queue
CommandQueue cmdQueue = Cl.CreateCommandQueue(_context, _device, (CommandQueueProperties)0, out error);
LogError(error, "Cl.CreateCommandQueue");
Event clevent;
// Copy input image from the host to the GPU
IntPtr[] originPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 };
IntPtr[] regionPtr = new IntPtr[] { (IntPtr)imagewidth, (IntPtr)imageHeight, (IntPtr)1 };
IntPtr[] workGroupSizePtr = new IntPtr[] { (IntPtr)imagewidth, (IntPtr)imageHeight, (IntPtr)1 };
error = Cl.EnqueueWriteImage(cmdQueue, inputImage2DBuffer, Bool.True, originPtr, regionPtr, (IntPtr)0,
(IntPtr)0, inputByteArray, 0, null, out clevent);
LogError(error, "Cl.EnqueueWriteImage");
// Run the kernel
error = Cl.EnqueueNDRangeKernel(cmdQueue, kernel, 2, null, workGroupSizePtr, null, 0, null, out clevent);
LogError(error, "Cl.EnqueueNDRangeKernel");
// Wait for finish event
error = Cl.Finish(cmdQueue);
LogError(error, "Cl.Finish");
// Read the output image back from GPU
error = Cl.EnqueueReadImage(cmdQueue, outputImage2DBuffer, Bool.True, originPtr, regionPtr, (IntPtr)0,
(IntPtr)0, outputByteArray, 0, null, out clevent);
LogError(error, "Cl.EnqueueReadImage");
error = Cl.Finish(cmdQueue);
LogError(error, "Cl.Finih");
// Release memory
Cl.ReleaseKernel(kernel);
Cl.ReleaseCommandQueue(cmdQueue);
Cl.ReleaseMemObject(inputImage2DBuffer);
Cl.ReleaseMemObject(outputImage2DBuffer);
// Convert binary bitmap to JPEG image and return as response
GCHandle pinnedOutputArray = GCHandle.Alloc(outputByteArray, GCHandleType.Pinned);
IntPtr outputBmpPointer = pinnedOutputArray.AddrOfPinnedObject();
Bitmap outputBitmap = new Bitmap(imagewidth, imageHeight, bitmapData.Stride, PixelFormat.Format32bppArgb, outputBmpPointer);
MemoryStream msOutput = new MemoryStream();
outputBitmap.Save(msOutput, System.Drawing.Imaging.ImageFormat.Jpeg);
response.Body = msOutput.ToArray();
response.Type = "image/jpeg";
return(response);
}
}
return(new HTTPResponse(501));
}
public void ImagingTest(string inputImagePath, string outputImagePath)
{
ErrorCode error;
//Load and compile kernel source code.
string programPath = System.Environment.CurrentDirectory + "/../../imagingtest.cl"; //The path to the source file may vary
if (!System.IO.File.Exists(programPath))
{
Console.WriteLine("Program doesn't exist at path " + programPath);
return;
}
string programSource = System.IO.File.ReadAllText(programPath);
using (Program program = Cl.CreateProgramWithSource(_context, 1, new[] { programSource }, null, out error))
{
CheckErr(error, "Cl.CreateProgramWithSource");
//Compile kernel source
error = Cl.BuildProgram(program, 1, new[] { _device }, string.Empty, null, IntPtr.Zero);
CheckErr(error, "Cl.BuildProgram");
//Check for any compilation errors
if (Cl.GetProgramBuildInfo(program, _device, ProgramBuildInfo.Status, out error).CastTo <BuildStatus>()
!= BuildStatus.Success && 1 == 0)
{
CheckErr(error, "Cl.GetProgramBuildInfo");
Console.WriteLine("Cl.GetProgramBuildInfo != Success");
Console.WriteLine(Cl.GetProgramBuildInfo(program, _device, ProgramBuildInfo.Log, out error));
return;
}
//Create the required kernel (entry function)
Kernel kernel = Cl.CreateKernel(program, "imagingTest", out error);
CheckErr(error, "Cl.CreateKernel");
int intPtrSize = 0;
intPtrSize = Marshal.SizeOf(typeof(IntPtr));
//Image's RGBA data converted to an unmanaged[] array
byte[] inputByteArray;
//OpenCL memory buffer that will keep our image's byte[] data.
Mem inputImage2DBuffer;
OpenCL.Net.ImageFormat clImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Unsigned_Int8);
int inputImgWidth, inputImgHeight;
int inputImgBytesSize;
int inputImgStride;
//Try loading the input image
using (FileStream imageFileStream = new FileStream(inputImagePath, FileMode.Open))
{
System.Drawing.Image inputImage = System.Drawing.Image.FromStream(imageFileStream);
if (inputImage == null)
{
Console.WriteLine("Unable to load input image");
return;
}
inputImgWidth = inputImage.Width;
inputImgHeight = inputImage.Height;
System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap(inputImage);
//Get raw pixel data of the bitmap
//The format should match the format of clImageFormat
BitmapData bitmapData = bmpImage.LockBits(new Rectangle(0, 0, bmpImage.Width, bmpImage.Height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);//inputImage.PixelFormat);
inputImgStride = bitmapData.Stride;
inputImgBytesSize = bitmapData.Stride * bitmapData.Height;
//Copy the raw bitmap data to an unmanaged byte[] array
inputByteArray = new byte[inputImgBytesSize];
Marshal.Copy(bitmapData.Scan0, inputByteArray, 0, inputImgBytesSize);
//Allocate OpenCL image memory buffer
inputImage2DBuffer = (OpenCL.Net.Mem)OpenCL.Net.Cl.CreateImage2D(_context,
OpenCL.Net.MemFlags.CopyHostPtr | OpenCL.Net.MemFlags.ReadOnly, clImageFormat,
(IntPtr)bitmapData.Width, (IntPtr)bitmapData.Height,
(IntPtr)0, inputByteArray, out error);
CheckErr(error, "Cl.CreateImage2D input");
}
//Unmanaged output image's raw RGBA byte[] array
byte[] outputByteArray = new byte[inputImgBytesSize];
//Allocate OpenCL image memory buffer
OpenCL.Net.Mem outputImage2DBuffer = (OpenCL.Net.Mem)OpenCL.Net.Cl.CreateImage2D(_context, OpenCL.Net.MemFlags.CopyHostPtr | OpenCL.Net.MemFlags.WriteOnly, clImageFormat,
(IntPtr)inputImgWidth, (IntPtr)inputImgHeight, (IntPtr)0, outputByteArray, out error);
CheckErr(error, "Cl.CreateImage2D output");
//Pass the memory buffers to our kernel function
error = Cl.SetKernelArg(kernel, 0, (IntPtr)intPtrSize, inputImage2DBuffer);
error |= Cl.SetKernelArg(kernel, 1, (IntPtr)intPtrSize, outputImage2DBuffer);
CheckErr(error, "Cl.SetKernelArg");
//Create a command queue, where all of the commands for execution will be added
CommandQueue cmdQueue = Cl.CreateCommandQueue(_context, _device, (CommandQueueProperties)0, out error);
CheckErr(error, "Cl.CreateCommandQueue");
OpenCL.Net.Event clevent;
//Copy input image from the host to the GPU.
IntPtr[] originPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 }; //x, y, z
IntPtr[] regionPtr = new IntPtr[] { (IntPtr)inputImgWidth, (IntPtr)inputImgHeight, (IntPtr)1 }; //x, y, z
IntPtr[] workGroupSizePtr = new IntPtr[] { (IntPtr)inputImgWidth, (IntPtr)inputImgHeight, (IntPtr)1 };
error = Cl.EnqueueWriteImage(cmdQueue, inputImage2DBuffer, OpenCL.Net.Bool.True, originPtr, regionPtr, (IntPtr)0, (IntPtr)0, inputByteArray, 0, null, out clevent);
CheckErr(error, "Cl.EnqueueWriteImage");
//Execute our kernel (OpenCL code)
// CommandQueue q = new OpenCL.Net.CommandQueue();
//enqueue nd range kernel
// error = cmdQueue.EnqueueKernel(cmdQueue, kernel, 2, null, workGroupSizePtr, null, 0, null, out clevent);
// OpenCL.Net.Cl.EnqueueNDRangeKernel(
OpenCL.Net.Cl.EnqueueNDRangeKernel(cmdQueue, kernel, 2, null, workGroupSizePtr, null, 0, null, out clevent);
CheckErr(error, "Cl.EnqueueNDRangeKernel");
//Wait for completion of all calculations on the GPU.
error = Cl.Finish(cmdQueue);
CheckErr(error, "Cl.Finish");
//Read the processed image from GPU to raw RGBA data byte[] array
error = Cl.EnqueueReadImage(cmdQueue, outputImage2DBuffer, OpenCL.Net.Bool.True, originPtr, regionPtr,
(IntPtr)0, (IntPtr)0, outputByteArray, 0, null, out clevent);
CheckErr(error, "Cl.clEnqueueReadImage");
//Clean up memory
Cl.ReleaseKernel(kernel);
Cl.ReleaseCommandQueue(cmdQueue);
Cl.ReleaseMemObject(inputImage2DBuffer);
Cl.ReleaseMemObject(outputImage2DBuffer);
//Get a pointer to our unmanaged output byte[] array
GCHandle pinnedOutputArray = GCHandle.Alloc(outputByteArray, GCHandleType.Pinned);
IntPtr outputBmpPointer = pinnedOutputArray.AddrOfPinnedObject();
//Create a new bitmap with processed data and save it to a file.
Bitmap outputBitmap = new Bitmap(inputImgWidth, inputImgHeight, inputImgStride, PixelFormat.Format32bppArgb, outputBmpPointer);
outputBitmap.Save(outputImagePath, System.Drawing.Imaging.ImageFormat.Png);
pinnedOutputArray.Free();
}
}
protected void EnqueueReadImage(IMem targetMemory, byte[] destination, out ErrorCode error)
{
error = Cl.EnqueueReadImage(commandQueue, targetMemory, Bool.True, origin,
globalWorkGroupSize, (IntPtr)0, (IntPtr)0, destination, 0, null, out Event clEvent);
}
// copypasted/modified from Map2Bmp
public Bitmap Map2BmpFauxColors(FloatMap inMap, float k)
{
var kernel = _kernels["mapToFauxColorsBmp"];
int w = inMap.W;
int h = inMap.H;
var clInImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.Luminance, ChannelType.Float);
IMem inputImage2DBuffer = Cl.CreateImage2D(_context, MemFlags.CopyHostPtr | MemFlags.ReadOnly, clInImageFormat,
(IntPtr)w, (IntPtr)h,
new IntPtr(inMap.Stride * sizeof(float)), inMap._buf, out err);
assert(err, "input img creation");
var clOutImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Unsigned_Int8);
IMem outputImage2DBuffer = Cl.CreateImage2D(_context, MemFlags.WriteOnly, clOutImageFormat,
(IntPtr)w, (IntPtr)h,
(IntPtr)0, (IntPtr)0, out err);
assert(err, "output img creation");
err = Cl.SetKernelArg(kernel, 0, intPtrSize, inputImage2DBuffer);
assert(err, "input img setKernelArg");
err = Cl.SetKernelArg(kernel, 1, intPtrSize, outputImage2DBuffer);
assert(err, "output img setKernelArg");
err = Cl.SetKernelArg(kernel, 2, floatSize, k);
assert(err, "k setKernelArg");
Event clevent;
//x, y, z
IntPtr[] originPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 };
IntPtr[] regionPtr = new IntPtr[] { (IntPtr)w, (IntPtr)h, (IntPtr)1 };
IntPtr[] workGroupSizePtr = new IntPtr[] { (IntPtr)w, (IntPtr)h, (IntPtr)1 };
//err = Cl.EnqueueWriteImage(_commandsQueue, inputImage2DBuffer, Bool.True, originPtr, regionPtr, (IntPtr)0, (IntPtr)0, inputByteArray, 0, null, out clevent);
//assert(err, "Cl.EnqueueWriteImage");
//Execute kernel
err = Cl.EnqueueNDRangeKernel(_commandsQueue, kernel, 2, null, workGroupSizePtr, null, 0, null, out clevent);
clevent.Dispose();
assert(err, "Cl.EnqueueNDRangeKernel");
//Wait for completion
err = Cl.Finish(_commandsQueue);
assert(err, "Cl.Finish");
// get data back
var outputByteArray = new byte[w * h * 4];
err = Cl.EnqueueReadImage(_commandsQueue, outputImage2DBuffer, Bool.True, originPtr, regionPtr, (IntPtr)0, (IntPtr)0, outputByteArray, 0, null, out clevent);
clevent.Dispose();
assert(err, "read output buffer");
Cl.ReleaseMemObject(inputImage2DBuffer);
Cl.ReleaseMemObject(outputImage2DBuffer);
GCHandle pinnedOutputArray = GCHandle.Alloc(outputByteArray, GCHandleType.Pinned);
IntPtr outputBmpPointer = pinnedOutputArray.AddrOfPinnedObject();
var bmp = new Bitmap(w, h, w * 4, PixelFormat.Format32bppArgb, outputBmpPointer);
pinnedOutputArray.Free();
return(bmp);
}
public FloatMap Bmp2Map(Bitmap bmpImage)
{
var kernel = _kernels["getLumaImg"];
int w = bmpImage.Width;
int h = bmpImage.Height;
BitmapData bitmapData = bmpImage.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
int inputImgStride = bitmapData.Stride;
int inputImgBytesSize = bitmapData.Stride * bitmapData.Height;
//Copy the raw bitmap data to an unmanaged byte[] array
byte[] inputByteArray = new byte[inputImgBytesSize];
Marshal.Copy(bitmapData.Scan0, inputByteArray, 0, inputImgBytesSize);
var clInImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Unsigned_Int8);
//Allocate OpenCL image memory buffer
IMem inputImage2DBuffer = Cl.CreateImage2D(_context, MemFlags.CopyHostPtr | MemFlags.ReadOnly, clInImageFormat,
(IntPtr)bitmapData.Width, (IntPtr)bitmapData.Height,
(IntPtr)0, inputByteArray, out err);
assert(err, "input img creation");
var clOutImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.Luminance, ChannelType.Float);
FloatMap outMap = new FloatMap(w, h);
IMem outputMapBuffer = Cl.CreateImage2D(_context, MemFlags.WriteOnly, clOutImageFormat,
(IntPtr)outMap.W, (IntPtr)outMap.H, new IntPtr(outMap.Stride * sizeof(float)),
outMap._buf, out err);
assert(err, "output img creation");
err = Cl.SetKernelArg(kernel, 0, intPtrSize, inputImage2DBuffer);
assert(err, "input img setKernelArg");
err = Cl.SetKernelArg(kernel, 1, intPtrSize, outputMapBuffer);
assert(err, "output img setKernelArg");
Event clevent;
//Copy input image from the host to the GPU.
IntPtr[] originPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 }; //x, y, z
IntPtr[] regionPtr = new IntPtr[] { (IntPtr)w, (IntPtr)h, (IntPtr)1 }; //x, y, z
IntPtr[] workGroupSizePtr = new IntPtr[] { (IntPtr)w, (IntPtr)h, (IntPtr)1 };
//err = Cl.EnqueueWriteImage(_commandsQueue, inputImage2DBuffer, Bool.True, originPtr, regionPtr, (IntPtr)0, (IntPtr)0, inputByteArray, 0, null, out clevent);
//assert(err, "Cl.EnqueueWriteImage");
//Execute our kernel (OpenCL code)
err = Cl.EnqueueNDRangeKernel(_commandsQueue, kernel, 2, null, workGroupSizePtr, null, 0, null, out clevent);
clevent.Dispose();
assert(err, "Cl.EnqueueNDRangeKernel");
//Wait for completion of all calculations on the GPU.
err = Cl.Finish(_commandsQueue);
assert(err, "Cl.Finish");
err = Cl.EnqueueReadImage(_commandsQueue, outputMapBuffer, Bool.True, originPtr, regionPtr, new IntPtr(outMap.Stride * sizeof(float)), (IntPtr)0, outMap._buf, 0, null, out clevent);
clevent.Dispose();
assert(err, "read output buffer");
Cl.ReleaseMemObject(inputImage2DBuffer);
Cl.ReleaseMemObject(outputMapBuffer);
return(outMap);
}
/* Broken at the moment. */
public void GetStatGPU(string file)
{
var stopwatch = new System.Diagnostics.Stopwatch();
stopwatch.Start();
stopwatch.Restart();
ErrorCode err;
using (OpenCL.Net.Program program = Cl.CreateProgramWithSource(clInfo._context, 1, new[] { clInfo.KernelSrc }, null, out err))
{
clInfo.CheckErr(err, "Cl.CreateProgramWithSource");
//Compile Kernels & check errors.
err = Cl.BuildProgram(program, 1, new[] { clInfo._device }, string.Empty, null, IntPtr.Zero);
clInfo.CheckErr(err, "Cl.BuildProgram");
if (Cl.GetProgramBuildInfo(program, clInfo._device, ProgramBuildInfo.Status, out err).CastTo <BuildStatus>() != BuildStatus.Success)
{
clInfo.CheckErr(err, "Cl.GetProgramBuildInfo");
Console.WriteLine("Cl.GetProgramBuildInfo != Success");
Console.WriteLine(Cl.GetProgramBuildInfo(program, clInfo._device, ProgramBuildInfo.Log, out err));
}
//Specify the specific kernel for use
Kernel kernel = Cl.CreateKernel(program, "satAvg", out err);
clInfo.CheckErr(err, "Cl.CreateKernel");
int intPtrSize = 0;
intPtrSize = Marshal.SizeOf(typeof(IntPtr));
IMem image2DBuffer;
OpenCL.Net.ImageFormat imageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Unsigned_Int8);
int imageWidth, imageHeight, imageBytesSize, imageStride;
using (FileStream imgStream = new FileStream(file, FileMode.Open))
{
Image image = Image.FromStream(imgStream);
if (image == null)
{
Console.Error.WriteLine($"failed to open file {file}");
return;
}
imageWidth = image.Width;
imageHeight = image.Height;
//Create a bitmap from the file with the correct channel settings.
Bitmap inputBitmap = new Bitmap(image);
BitmapData bitmapDat = inputBitmap.LockBits(new Rectangle(0, 0, inputBitmap.Width, inputBitmap.Height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
imageStride = bitmapDat.Stride;
imageBytesSize = imageStride * bitmapDat.Height;
byte[] inputByteArray = new byte[imageBytesSize];
Marshal.Copy(bitmapDat.Scan0, inputByteArray, 0, imageBytesSize);
//Create & populate memory buffer for use in Kernel
image2DBuffer = Cl.CreateImage2D(clInfo._context,
MemFlags.CopyHostPtr | MemFlags.ReadOnly, imageFormat,
(IntPtr)inputBitmap.Width,
(IntPtr)inputBitmap.Height,
(IntPtr)0, inputByteArray, out err);
clInfo.CheckErr(err, "Cl.CreateImage2D output");
}
//Create an output buffer for the average saturation of the image.
float saturation = 0;
IMem sat = Cl.CreateBuffer(clInfo._context, MemFlags.CopyHostPtr | MemFlags.WriteOnly, (IntPtr)intPtrSize, (object)saturation, out err);
clInfo.CheckErr(err, "Cl.CreateBuffer saturation");
//Passing buffers to the CL kernel
err = Cl.SetKernelArg(kernel, 0, (IntPtr)intPtrSize, image2DBuffer);
//TODO: Figure out how to pass a float to the kernel
//err |= Cl.SetKernelArg(kernel, 1, (IntPtr)intPtrSize, sat );
clInfo.CheckErr(err, "Cl.SetKernelArg");
//Create & queue commands
CommandQueue cmdQueue = Cl.CreateCommandQueue(clInfo._context, clInfo._device, CommandQueueProperties.None, out err);
clInfo.CheckErr(err, "Cl.CreateCommandQueue");
Event @event;
//Transfer image data to kernel buffers
IntPtr[] originPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 };
IntPtr[] regionPtr = new IntPtr[] { (IntPtr)imageWidth, (IntPtr)imageHeight, (IntPtr)1 };
IntPtr[] workGroupPtr = new IntPtr[] { (IntPtr)imageWidth, (IntPtr)imageHeight, (IntPtr)1 };
err = Cl.EnqueueReadImage(cmdQueue, image2DBuffer, Bool.True, originPtr, regionPtr, (IntPtr)0, (IntPtr)0, null, 0, null, out @event);
clInfo.CheckErr(err, "Cl.EnqueueReadImage");
//Execute the kerenl
err = Cl.EnqueueNDRangeKernel(cmdQueue, kernel, 2, null, workGroupPtr, null, 0, null, out @event);
clInfo.CheckErr(err, "Cl.EnqueueNDRangeKernel");
err = Cl.Finish(cmdQueue);
clInfo.CheckErr(err, "Cl.Finish");
Cl.ReleaseKernel(kernel);
Cl.ReleaseCommandQueue(cmdQueue);
Cl.ReleaseMemObject(image2DBuffer);
}
Console.WriteLine(stopwatch.Elapsed);
stopwatch.Stop();
}
public Bitmap GPUMandel(Bitmap inputBitmap)
{
ErrorCode error;
//Load and compile kernel source code.
string programPath = System.Environment.CurrentDirectory + "/../../program.cl";
//The path to the source file may vary
if (!System.IO.File.Exists(programPath))
{
Console.WriteLine("Program doesn't exist at path " + programPath);
return(inputBitmap);
}
string programSource = System.IO.File.ReadAllText(programPath);
using (Program program = Cl.CreateProgramWithSource(_context, 1, new[] { programSource }, null, out error))
{
CheckErr(error, "Cl.CreateProgramWithSource");
//Compile kernel source
error = Cl.BuildProgram(program, 1, new[] { _device }, string.Empty, null, IntPtr.Zero);
CheckErr(error, "Cl.BuildProgram");
//Check for any compilation errors
if (Cl.GetProgramBuildInfo(program, _device, ProgramBuildInfo.Status, out error).CastTo <BuildStatus>()
!= BuildStatus.Success)
{
CheckErr(error, "Cl.GetProgramBuildInfo");
Console.WriteLine("Cl.GetProgramBuildInfo != Success");
Console.WriteLine(Cl.GetProgramBuildInfo(program, _device, ProgramBuildInfo.Log, out error));
return(inputBitmap);
}
//Create the required kernel (entry function)
Kernel kernel = Cl.CreateKernel(program, "Mandelbrot", out error);
CheckErr(error, "Cl.CreateKernel");
//Unmanaged output image's raw RGBA byte[] array
BitmapData bitmapData = inputBitmap.LockBits(new Rectangle(0, 0, inputBitmap.Width, inputBitmap.Height), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
int inputImgBytesSize = bitmapData.Stride * bitmapData.Height;
int inputImgWidth = inputBitmap.Width;
int inputImgHeight = inputBitmap.Height;
int intPtrSize = Marshal.SizeOf(typeof(IntPtr));
OpenCL.Net.ImageFormat clImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Unsigned_Int8);
//OpenCL.Net.ImageFormat clImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Float);
byte[] outputByteArray = new byte[inputImgBytesSize];
//Allocate OpenCL image memory buffer
Mem outputImage2DBuffer = (Mem)Cl.CreateImage2D(_context, MemFlags.CopyHostPtr |
MemFlags.WriteOnly, clImageFormat, (IntPtr)inputImgWidth,
(IntPtr)inputImgHeight, (IntPtr)0, outputByteArray, out error);
CheckErr(error, "Cl.CreateImage2D output");
//Pass the memory buffers to our kernel function
error = Cl.SetKernelArg(kernel, 0, (IntPtr)intPtrSize, outputImage2DBuffer);
CheckErr(error, "Cl.SetKernelArg");
//Create a command queue, where all of the commands for execution will be added
CommandQueue cmdQueue = Cl.CreateCommandQueue(_context, _device, (CommandQueueProperties)0, out error);
CheckErr(error, "Cl.CreateCommandQueue");
Event clevent;
//Copy input image from the host to the GPU.
IntPtr[] originPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 }; //x, y, z
IntPtr[] regionPtr = new IntPtr[] { (IntPtr)inputImgWidth, (IntPtr)inputImgHeight, (IntPtr)1 }; //x, y, z
IntPtr[] workGroupSizePtr = new IntPtr[] { (IntPtr)inputImgWidth, (IntPtr)inputImgHeight, (IntPtr)1 };
error = Cl.EnqueueWriteImage(cmdQueue, outputImage2DBuffer, Bool.True,
originPtr, regionPtr, (IntPtr)0, (IntPtr)0, outputByteArray, 0, null, out clevent);
CheckErr(error, "Cl.EnqueueWriteImage");
//Execute our kernel (OpenCL code)
error = Cl.EnqueueNDRangeKernel(cmdQueue, kernel, 2, null, workGroupSizePtr, null, 0, null, out clevent);
CheckErr(error, "Cl.EnqueueNDRangeKernel");
//Wait for completion of all calculations on the GPU.
error = Cl.Finish(cmdQueue);
CheckErr(error, "Cl.Finish");
//Read the processed image from GPU to raw RGBA data byte[] array
error = Cl.EnqueueReadImage(cmdQueue, outputImage2DBuffer, Bool.True, originPtr, regionPtr,
(IntPtr)0, (IntPtr)0, outputByteArray, 0, null, out clevent);
CheckErr(error, "Cl.clEnqueueReadImage");
//Clean up memory
Cl.ReleaseKernel(kernel);
Cl.ReleaseCommandQueue(cmdQueue);
//Cl.ReleaseMemObject(inputImage2DBuffer);
Cl.ReleaseMemObject(outputImage2DBuffer);
//Get a pointer to our unmanaged output byte[] array
GCHandle pinnedOutputArray = GCHandle.Alloc(outputByteArray, GCHandleType.Pinned);
IntPtr outputBmpPointer = pinnedOutputArray.AddrOfPinnedObject();
//Create a new bitmap with processed data and save it to a file.
Bitmap outputBitmap = new Bitmap(inputImgWidth, inputImgHeight,
bitmapData.Stride, PixelFormat.Format32bppArgb, outputBmpPointer);
return(outputBitmap);
//outputBitmap.Save(outputImagePath, System.Drawing.Imaging.ImageFormat.Png);
//pinnedOutputArray.Free();
}
}
public static void SubmitImage2DRead(ComputeImage2D img, object dest)
{
Cl.EnqueueReadImage(_queue, img.img, Bool.False, new[] { IntPtr.Zero, IntPtr.Zero, IntPtr.Zero }, new[] { (IntPtr)img.Width, (IntPtr)img.Height, (IntPtr)1 }, IntPtr.Zero, IntPtr.Zero, dest, 0, null, out var ign);
}