Copy texture to buffer without COPY_BYTES_PER_ROW_ALIGNMENT

[ghost]

Hi,

I want to copy a texture to a buffer. The texture I use doesn't respect the COPY_BYTES_PER_ROW_ALIGNMENT.
Therefore the following code panics:

let mut encoder = self
            .device
            .create_command_encoder(&wgpu::CommandEncoderDescriptor { label: None });
encoder.copy_texture_to_buffer(
    wgpu::ImageCopyTexture {
        aspect: wgpu::TextureAspect::All,
        texture: &self.texture,
        mip_level: 0,
        origin: wgpu::Origin3d::ZERO,
    },
    wgpu::ImageCopyBuffer {
        buffer: &self.output_buffer,
        layout: wgpu::ImageDataLayout {
            offset: 0,
            bytes_per_row: Some(NonZeroU32::new(U32_SIZE * self.texture_size.0).unwrap()),
            rows_per_image: Some(NonZeroU32::new(self.texture_size.1).unwrap()),
        },
    },
    self.texture_desc.size,
);

self.queue.submit(Some(encoder.finish()));

How can I copy a texture with an arbitrary size to a buffer?

[kvark]

COPY_BYTES_PER_ROW_ALIGNMENT is not for a texture, it's for the buffer. You have to adjust bytes_per_row accordingly when placing this copy into a buffer.