// Fixed sub resource on first mip level and layer
public void SetImageLayout(
IMgCommandBuffer cmdbuffer,
IMgImage image,
MgImageAspectFlagBits aspectMask,
MgImageLayout oldImageLayout,
MgImageLayout newImageLayout)
{
var subresourceRange = new MgImageSubresourceRange {
AspectMask = aspectMask,
BaseMipLevel = 0,
LevelCount = 1,
LayerCount = 1,
};
PushImageMemoryBarrier(cmdbuffer, image, aspectMask, oldImageLayout, newImageLayout, subresourceRange);
}
// Create an image memory barrier for changing the layout of
// an image and put it into an active command buffer
// See chapter 11.4 "Image Layout" for details
private void PushImageMemoryBarrier(
IMgCommandBuffer cmdbuffer,
IMgImage image,
MgImageAspectFlagBits aspectMask,
MgImageLayout oldImageLayout,
MgImageLayout newImageLayout,
MgImageSubresourceRange subresourceRange)
{
const uint VK_QUEUE_FAMILY_IGNORED = ~0U; // 0xffffffff;
// Create an image barrier object
MgImageMemoryBarrier imageMemoryBarrier = new MgImageMemoryBarrier {
OldLayout = oldImageLayout,
NewLayout = newImageLayout,
Image = image,
SubresourceRange = subresourceRange,
// Some default values
SrcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
DstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
};
// Source layouts (old)
// Undefined layout
// Only allowed as initial layout!
// Make sure any writes to the image have been finished
if (oldImageLayout == MgImageLayout.PREINITIALIZED)
{
imageMemoryBarrier.SrcAccessMask = (MgAccessFlagBits.HOST_WRITE_BIT | MgAccessFlagBits.TRANSFER_WRITE_BIT);
}
// Old layout is color attachment
// Make sure any writes to the color buffer have been finished
if (oldImageLayout == MgImageLayout.COLOR_ATTACHMENT_OPTIMAL)
{
imageMemoryBarrier.SrcAccessMask = MgAccessFlagBits.COLOR_ATTACHMENT_WRITE_BIT;
}
// Old layout is depth/stencil attachment
// Make sure any writes to the depth/stencil buffer have been finished
if (oldImageLayout == MgImageLayout.DEPTH_STENCIL_ATTACHMENT_OPTIMAL)
{
imageMemoryBarrier.SrcAccessMask = MgAccessFlagBits.DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
}
// Old layout is transfer source
// Make sure any reads from the image have been finished
if (oldImageLayout == MgImageLayout.TRANSFER_SRC_OPTIMAL)
{
imageMemoryBarrier.SrcAccessMask = MgAccessFlagBits.TRANSFER_READ_BIT;
}
// Old layout is shader read (sampler, input attachment)
// Make sure any shader reads from the image have been finished
if (oldImageLayout == MgImageLayout.SHADER_READ_ONLY_OPTIMAL)
{
imageMemoryBarrier.SrcAccessMask = MgAccessFlagBits.SHADER_READ_BIT;
}
// Target layouts (new)
// New layout is transfer destination (copy, blit)
// Make sure any copyies to the image have been finished
if (newImageLayout == MgImageLayout.TRANSFER_DST_OPTIMAL)
{
imageMemoryBarrier.DstAccessMask = MgAccessFlagBits.TRANSFER_WRITE_BIT;
}
// New layout is transfer source (copy, blit)
// Make sure any reads from and writes to the image have been finished
if (newImageLayout == MgImageLayout.TRANSFER_SRC_OPTIMAL)
{
imageMemoryBarrier.SrcAccessMask = imageMemoryBarrier.SrcAccessMask | MgAccessFlagBits.TRANSFER_READ_BIT;
imageMemoryBarrier.DstAccessMask = MgAccessFlagBits.TRANSFER_READ_BIT;
}
// New layout is color attachment
// Make sure any writes to the color buffer have been finished
if (newImageLayout == MgImageLayout.COLOR_ATTACHMENT_OPTIMAL)
{
imageMemoryBarrier.DstAccessMask = MgAccessFlagBits.COLOR_ATTACHMENT_WRITE_BIT;
imageMemoryBarrier.SrcAccessMask = MgAccessFlagBits.TRANSFER_READ_BIT;
}
// New layout is depth attachment
// Make sure any writes to depth/stencil buffer have been finished
if (newImageLayout == MgImageLayout.DEPTH_STENCIL_ATTACHMENT_OPTIMAL)
{
imageMemoryBarrier.DstAccessMask = imageMemoryBarrier.DstAccessMask | MgAccessFlagBits.DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
}
// New layout is shader read (sampler, input attachment)
// Make sure any writes to the image have been finished
if (newImageLayout == MgImageLayout.SHADER_READ_ONLY_OPTIMAL)
{
imageMemoryBarrier.SrcAccessMask = MgAccessFlagBits.HOST_WRITE_BIT | MgAccessFlagBits.TRANSFER_WRITE_BIT;
imageMemoryBarrier.DstAccessMask = MgAccessFlagBits.SHADER_READ_BIT;
}
// Put barrier on top
MgPipelineStageFlagBits srcStageFlags = MgPipelineStageFlagBits.TOP_OF_PIPE_BIT;
MgPipelineStageFlagBits destStageFlags = MgPipelineStageFlagBits.TOP_OF_PIPE_BIT;
// Put barrier inside setup command buffer
cmdbuffer.CmdPipelineBarrier(
srcStageFlags,
destStageFlags,
0,
null,
null,
new [] { imageMemoryBarrier });
}
