EasyGPU 0.2.0 — Real wgpu-py Backend

Real backend release — WgpuPyGPU behind the stable GPU Protocol, with
offscreen render targets that render headlessly on lavapipe and WARP.

Added

• WgpuPyGPU (easygpu.wgpu_backend): delegates the existing GPU Protocol
  to wgpu-py. Adapter/device/queue creation (EASYGPU_SOFTWARE=1 forces a
  software adapter), buffers with synchronous readback, shader modules,
  render/compute pipelines with auto layouts, textures/views/samplers, bind
  groups, full render-pass and compute-pass encoding, submit,
  write_buffer/write_texture, copy_texture_to_buffer.
  WgpuPyGPU.from_wgpu_device() adopts an existing wgpu device;
  WgpuPyGPU.underlying_device exposes it.
• easygpu.gpu.WGPU_BACKEND_UNSUPPORTED: a frozenset[str] naming every
  Protocol method WgpuPyGPU does not yet implement (14 in 0.2.0).
• easygpu.testing: assertion helpers over FakeGPU.calls —
  assert_call_order, assert_no_call, diff_against, call_names.
• easygpu.offscreen: OffscreenTarget, offscreen_target(), and
  readback_rgba8() — real pipelines render into textures and pull pixels
  back (headless CI green on Linux/lavapipe and Windows/WARP).
• easygpu.wgpu_translate: pure descriptor/enum translation (18 enum tables).
• Optional wgpu extra (pip install easygpu[wgpu]); plain import easygpu
  stays zero-dependency.
• 3 offscreen examples: triangle_offscreen, textured_cube_offscreen,
  compute_boids_offscreen — dual-engine tested (FakeGPU recording + live
  wgpu pixels).

Changed

• __version__ → 0.2.0; import warning now nudges installing the wgpu extra.
• RenderPassColorAttachment.view accepts int handles, TextureView, or an
  OffscreenTarget.
• Pipeline color targets must declare a format (as WebGPU requires).

Fixed

• Basic vertex + textured fragment shaders (both fn main) now build as
  separate modules to satisfy WGSL redefinition rules on the real backend.

Install

pip install "easygpu[wgpu]"

What does NOT work in 0.2.0

• No swapchain / window output (offscreen targets work — use OffscreenTarget)
• No dynamic-offset bind groups
• No numpy integration (raw bytes / struct.pack)
• generate_mipmap on the real backend (staged for 0.3.0)

See the CHANGELOG
for the full list.