Explain “texture view is not renderable” error

[kpreid]

In wgpu 0.15.0:

thread 'main' panicked at 'wgpu error: Validation Error

Caused by:
    In a RenderPass
      note: encoder = `EverythingRenderer::draw_frame_linear()`
    In a pass parameter
      note: command buffer = `EverythingRenderer::draw_frame_linear()`
    attachment texture view is not renderable

The specific problem here was that the texture view has more than one mipmap level, but the error message does not communicate that; one is left guessing and/or digging through the specification. A better message would say which condition was violated and what the disallowed value was.

[cwfitzgerald]

New error is:

Caused by:
    In a RenderPass
      note: encoder = `<CommandBuffer-(0, 1, Vulkan)>`
    In a pass parameter
      note: command buffer = `<CommandBuffer-(0, 1, Vulkan)>`
    The color attachment at index 0's texture view is not renderable:
    The texture this view references doesn't include the RENDER_ATTACHMENT usage. Provided usages: COPY_DST | TEXTURE_BINDING