internal OpenCLFractalEngine(OpenTK.Graphics.IGraphicsContext graphicsContext, Platform platform, Device device)
{
if (graphicsContext == null || !(graphicsContext is OpenTK.Graphics.IGraphicsContextInternal))
{
throw new ArgumentException("Invalid graphics context for OpenCLFractalEngine.", "graphicsContext");
}
if (platform == null)
{
throw new ArgumentException("Invalid platform for OpenCLFractalEngine", "platform");
}
if (device == null)
{
throw new ArgumentException("Invalid device for OpenCLFractalEngine", "device");
}
this.platform = platform;
this.device = device;
useLowProfile = !device.ImageSupport;
IntPtr curDC = wglGetCurrentDC();
OpenTK.Graphics.IGraphicsContextInternal gCtx = (OpenTK.Graphics.IGraphicsContextInternal)graphicsContext;
context = OpenCL.Context.Create(new Device[] { device },
new ContextParam(ContextProperties.Platform, platform),
new ContextParam(ContextProperties.GlContext, gCtx.Context.Handle),
new ContextParam(ContextProperties.WglHdc, curDC));
iterBlockCount = Util.Clamp((int)device.MaxComputeUnits * 2, 2, 64);
string source = null;
if (useLowProfile)
{
source = Kernels.KernelResources.kernels_low_cl;
}
else
{
source = Kernels.KernelResources.kernels_cl;
}
string opts = "";
try{
program = OpenCL.Program.CreateFromSource(context, new string[] { source });
program.Build(new Device[] { device }, opts);
}
catch (OpenCLCallFailedException ex)
{
if (ex.ErrorCode == OpenCL.ErrorCode.BuildProgramFailure)
{
ex.Data.Add("build_log", program.GetBuildLog(device));
}
throw ex;
}
initIteratorsKernel = Kernel.Create(program, "init_iterators_kernel");
resetIteratorsKernel = Kernel.Create(program, "reset_iterators_kernel");
iterateKernel = Kernel.Create(program, "iterate_kernel");
updateStatsKernel = Kernel.Create(program, "update_stats_kernel");
resetOutputKernel = Kernel.Create(program, "reset_output_kernel");
updateOutputKernel = Kernel.Create(program, "update_output_kernel");
glOutputBufferID = 0;
queue = CommandQueue.Create(context, device, CommandQueueFlags.ProfilingEnable);
fractalBuffer = context.CreateBuffer(MemFlags.ReadOnly, Marshal.SizeOf(typeof(NativeFractal)));
branchBuffer = context.CreateBuffer(MemFlags.ReadOnly, Marshal.SizeOf(typeof(NativeBranch)) * NativeFractal.MaxBranches);
variWeightBuffer = context.CreateBuffer(MemFlags.ReadOnly, 4 * NativeFractal.MaxBranches * NativeFractal.MaxVariations);
iterPosStateBuffer = context.CreateBuffer(MemFlags.ReadWrite, (8 * IteratorCount));
iterColorStateBuffer = context.CreateBuffer(MemFlags.ReadWrite, (8 * IteratorCount));
iterStatBuffer = context.CreateBuffer(MemFlags.ReadWrite, Marshal.SizeOf(typeof(NativeIterStatEntry)) * IteratorCount);
globalStatBuffer = context.CreateBuffer(MemFlags.ReadWrite, Marshal.SizeOf(typeof(NativeGlobalStatEntry)));
entropyXBuffer = context.CreateBuffer(MemFlags.ReadWrite, (16 * IteratorCount));
entropyCBuffer = context.CreateBuffer(MemFlags.ReadWrite, (4 * IteratorCount));
entropySeedBuffer = context.CreateBuffer(MemFlags.ReadWrite, (4 * IteratorCount));
uint[] seeds = new uint[IteratorCount];
for (int i = 0; i < IteratorCount; i++)
{
seeds[i] = (uint)rand.Next(65536);
}
entropySeedBuffer.Write(queue, seeds);
paletteSize = new Size(0, 0);
paletteImage = null;
paletteBuffer = null;
if (!useLowProfile)
{
paletteSampler = Sampler.Create(context, true, AddressingMode.ClampToEdge, FilterMode.Linear);
}
initIteratorsKernel.SetArgs(entropyXBuffer, entropyCBuffer, entropySeedBuffer);
Event initEvt;
initIteratorsKernel.EnqueueLaunch(queue, IteratorCount, IterGroupSize, null, out initEvt);
initEvt.Wait();
disposeAndNullify(ref initEvt);
queue.Finish();
}