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use std::error;
use std::fmt;
use crate::device::Device;
use crate::image::ImageAccess;
use crate::VulkanObject;
pub fn check_clear_depth_stencil_image<I>(
device: &Device,
image: &I,
first_layer: u32,
num_layers: u32,
) -> Result<(), CheckClearDepthStencilImageError>
where
I: ?Sized + ImageAccess,
{
assert_eq!(
image.inner().image.device().internal_object(),
device.internal_object()
);
if !image.inner().image.usage().transfer_destination {
return Err(CheckClearDepthStencilImageError::MissingTransferUsage);
}
if first_layer + num_layers > image.dimensions().array_layers() {
return Err(CheckClearDepthStencilImageError::OutOfRange);
}
Ok(())
}
#[derive(Debug, Copy, Clone)]
pub enum CheckClearDepthStencilImageError {
MissingTransferUsage,
OutOfRange,
}
impl error::Error for CheckClearDepthStencilImageError {}
impl fmt::Display for CheckClearDepthStencilImageError {
#[inline]
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(
fmt,
"{}",
match *self {
CheckClearDepthStencilImageError::MissingTransferUsage => {
"the image is missing the transfer destination usage"
}
CheckClearDepthStencilImageError::OutOfRange => {
"the array layers are out of range"
}
}
)
}
}