internal static uint ComputeMipOffset(Texture tex, uint mipLevel)
{
uint blockSize = FormatHelpers.IsCompressedFormat(tex.Format) ? 4u : 1u;
uint offset = 0;
for (uint level = 0; level < mipLevel; level++)
{
GetMipDimensions(tex, level, out uint mipWidth, out uint mipHeight, out uint mipDepth);
uint storageWidth = Math.Max(mipWidth, blockSize);
uint storageHeight = Math.Max(mipHeight, blockSize);
offset += FormatHelpers.GetRegionSize(storageWidth, storageHeight, mipDepth, tex.Format);
}
return(offset);
}
internal static uint ComputeArrayLayerOffset(Texture tex, uint arrayLayer)
{
if (arrayLayer == 0)
{
return(0);
}
uint blockSize = FormatHelpers.IsCompressedFormat(tex.Format) ? 4u : 1u;
uint layerPitch = 0;
for (uint level = 0; level < tex.MipLevels; level++)
{
GetMipDimensions(tex, level, out uint mipWidth, out uint mipHeight, out uint mipDepth);
uint storageWidth = Math.Max(mipWidth, blockSize);
uint storageHeight = Math.Max(mipHeight, blockSize);
layerPitch += FormatHelpers.GetRegionSize(storageWidth, storageHeight, mipDepth, tex.Format);
}
return(layerPitch * arrayLayer);
}