public override void Update()
{
initGpuBuffers();
using (CommandPool cmdPoolCompute = new CommandPool(dev, computeQ.qFamIndex)) {
PrimaryCommandBuffer cmd = cmdPoolCompute.AllocateAndStart(VkCommandBufferUsageFlags.OneTimeSubmit);
pong = false;
uint stepSize = imgDim / 2;
plCompute.Bind(cmd);
cmd.PushConstant(plCompute.Layout, VkShaderStageFlags.Compute, imgDim, sizeof(int));
int pass = 0;
while (stepSize > 0 && pass < invocationCount)
{
cmd.PushConstant(plCompute.Layout, VkShaderStageFlags.Compute, stepSize);
if (pong)
{
plCompute.BindDescriptorSet(cmd, dsetPong);
}
else
{
plCompute.BindDescriptorSet(cmd, dsetPing);
}
cmd.Dispatch(imgDim, imgDim);
VkMemoryBarrier memBar = VkMemoryBarrier.New();
memBar.srcAccessMask = VkAccessFlags.ShaderWrite;
memBar.dstAccessMask = VkAccessFlags.ShaderRead;
Vk.vkCmdPipelineBarrier(cmd.Handle, VkPipelineStageFlags.ComputeShader, VkPipelineStageFlags.ComputeShader, VkDependencyFlags.ByRegion,
1, ref memBar, 0, IntPtr.Zero, 0, IntPtr.Zero);
pong = !pong;
stepSize /= 2;
pass++;
}
plNormalize.Bind(cmd);
if (pong)
{
plNormalize.BindDescriptorSet(cmd, dsetPong);
}
else
{
plNormalize.BindDescriptorSet(cmd, dsetPing);
}
cmd.Dispatch(imgDim, imgDim);
pong = !pong;
cmd.End();
computeQ.Submit(cmd);
computeQ.WaitIdle();
}
printResults();
}
public void Run()
{
using (CommandPool cmdPool = new CommandPool(dev, computeQ.qFamIndex)) {
PrimaryCommandBuffer cmd = cmdPool.AllocateAndStart(VkCommandBufferUsageFlags.OneTimeSubmit);
plCompute.Bind(cmd);
plCompute.BindDescriptorSet(cmd, dset);
cmd.Dispatch(data_size * sizeof(int));
cmd.End();
computeQ.Submit(cmd);
computeQ.WaitIdle();
}
printResults();
}