public unsafe void Mipmaps()
{
PhysicalDevice physicalDevice = _renderer.Params.PhysicalDevice;
Vk vk = _renderer.Vk;
vk.GetPhysicalDeviceFormatProperties(physicalDevice, _format, out FormatProperties formatProperties);
if (!formatProperties.OptimalTilingFeatures.HasFlag(FormatFeatureFlags.FormatFeatureSampledImageFilterLinearBit)) // bitting not supported.
{
return;
}
CommandBuffer commandBuffer = BeginImageCommandBuffer();
uint mipWidth = Size.X;
uint mipHeight = Size.Y;
ImageMemoryBarrier barrier = new()
{
SType = StructureType.ImageMemoryBarrier,
Image = _image,
SrcQueueFamilyIndex = Vk.QueueFamilyIgnored,
DstQueueFamilyIndex = Vk.QueueFamilyIgnored,
SubresourceRange = new ImageSubresourceRange()
{
AspectMask = ImageAspectFlags.ImageAspectColorBit,
BaseArrayLayer = 0,
LayerCount = 1,
BaseMipLevel = 0,
LevelCount = 1
}
};
for (uint i = 1; i < _mipLevelCount; i++)
{
barrier.SubresourceRange.BaseMipLevel = i - 1;
barrier.OldLayout = ImageLayout.TransferDstOptimal;
barrier.NewLayout = ImageLayout.TransferSrcOptimal;
barrier.SrcAccessMask = AccessFlags.AccessTransferWriteBit;
barrier.DstAccessMask = AccessFlags.AccessTransferReadBit;
vk.CmdPipelineBarrier(commandBuffer, PipelineStageFlags.PipelineStageTransferBit, PipelineStageFlags.PipelineStageTransferBit, 0, 0, null, 0, null, 1, barrier);
ImageBlit blit = new()
{
SrcOffsets = new ImageBlit.SrcOffsetsBuffer()
{
Element0 = new Offset3D()
{
X = 0,
Y = 0,
Z = 0,
},
Element1 = new Offset3D()
{
X = (int)mipWidth,
Y = (int)mipHeight,
Z = 1
}
},
SrcSubresource = new ImageSubresourceLayers()
{
AspectMask = ImageAspectFlags.ImageAspectColorBit,
MipLevel = i - 1,
BaseArrayLayer = 0,
LayerCount = 1
},
DstOffsets = new ImageBlit.DstOffsetsBuffer()
{
Element0 = new Offset3D()
{
X = 0,
Y = 0,
Z = 0
},
Element1 = new Offset3D()
{
X = (int)((mipWidth > 1) ? mipWidth / 2 : 1),
Y = (int)((mipHeight > 1) ? mipHeight / 2 : 1),
Z = 1
}
},
DstSubresource = new ImageSubresourceLayers()
{
AspectMask = ImageAspectFlags.ImageAspectColorBit,
MipLevel = i,
BaseArrayLayer = 0,
LayerCount = 1
}
};
vk.CmdBlitImage(commandBuffer, _image, ImageLayout.TransferSrcOptimal,
_image, ImageLayout.TransferDstOptimal, 1, blit, HasFlag(ImageFlags.Nearest) ? Filter.Nearest : Filter.Linear);
barrier.OldLayout = ImageLayout.TransferSrcOptimal;
barrier.NewLayout = ImageLayout.ShaderReadOnlyOptimal;
barrier.SrcAccessMask = AccessFlags.AccessTransferReadBit;
barrier.DstAccessMask = AccessFlags.AccessShaderReadBit;
vk.CmdPipelineBarrier(commandBuffer, PipelineStageFlags.PipelineStageTransferBit, PipelineStageFlags.PipelineStageFragmentShaderBit, 0, 0, null, 0, null, 1, barrier);
mipWidth /= 2;
mipHeight /= 2;
}
barrier.SubresourceRange.BaseMipLevel = _mipLevelCount - 1;
barrier.OldLayout = ImageLayout.TransferDstOptimal;
barrier.NewLayout = ImageLayout.ShaderReadOnlyOptimal;
barrier.SrcAccessMask = AccessFlags.AccessTransferWriteBit;
barrier.DstAccessMask = AccessFlags.AccessShaderReadBit;
vk.CmdPipelineBarrier(commandBuffer, PipelineStageFlags.PipelineStageTransferBit, PipelineStageFlags.PipelineStageFragmentShaderBit, 0, 0, null, 0, null, 1, barrier);
EndImageCommandBuffer(commandBuffer);
}