Function validate_texture_buffer_copy

pub(crate) fn validate_texture_buffer_copy<T>(
    texture_copy_view: &TexelCopyTextureInfo<T>,
    aspect: FormatAspects,
    desc: &TextureDescriptor<(), Vec<TextureFormat>>,
    layout: &TexelCopyBufferLayout,
    aligned: bool,
) -> Result<(), TransferError>

Validation for texture/buffer copies.

This implements the following checks from WebGPU’s validating texture buffer copy algorithm:

• The texture must not be multisampled.
• The copy must be from/to a single aspect of the texture.
• If aligned is true, the buffer offset must be aligned appropriately.

And implements the following check from WebGPU’s validating GPUTexelCopyBufferInfo algorithm:

• If aligned is true, bytesPerRow must be a multiple of 256.

Note that the bytesPerRow alignment check is enforced whenever bytesPerRow is specified, even if the transfer is not multiple rows and bytesPerRow could have been omitted.

The following steps in validating texture buffer copy are implemented elsewhere:

• Invocation of other validation algorithms.
• The texture usage (COPY_DST / COPY_SRC) check.
• The check for non-copyable depth/stencil formats. The caller must perform this check using validate_texture_copy_src_format / validate_texture_copy_dst_format before calling this function. This function will panic if wgt::TextureFormat::block_copy_size returns None due to a non-copyable format.