Unverified Commit 0c101e7a authored by Andrew Marshall's avatar Andrew Marshall Committed by GitHub
Browse files

blender: Add pkg test for rendering (#245613) 

Basic headless render test for Eevee and Cycles CPU. Did this because I
got a bit tired of testing render manually for both renderers (though
it’s not that much work).

Note that `render.threads` config is used only by Cycles. Using 1 thread
chosen because it’s not meaningfully slower than more for this render,
and it simplifies things to just pick 1 instead of making it dynamic.

Have chosen 32 samples since it’s not meaningfully slower than 1 (even
with `--cores 1`), and it’s not so small that maybe it’s not
representative, and too-low a number and there are artifacts that may
make it appear like something is broken.

Cycles denoising needs openimagedenoise and is not currently included in
aarch64 build.
parent 9e69bdb4

pkgs/applications/misc/blender/default.nix

+43 −3
Original line number Diff line number Diff line
@@ -15,6 +15,8 @@ 
, potrace

, openxr-loader

, embree, gmp, libharu

, mesa

, runCommand

}:



let
@@ -26,7 +28,7 @@ let 
  };



in

stdenv.mkDerivation rec {

stdenv.mkDerivation (finalAttrs: rec {

  pname = "blender";

  version = "3.6.3";
@@ -184,7 +186,45 @@ stdenv.mkDerivation rec { 
    done

  '';



  passthru = { inherit python; };

  passthru = {

    inherit python;



    tests = {

      render = runCommand "${pname}-test" { } ''

        set -euo pipefail



        export LIBGL_DRIVERS_PATH=${mesa.drivers}/lib/dri

        export __EGL_VENDOR_LIBRARY_FILENAMES=${mesa.drivers}/share/glvnd/egl_vendor.d/50_mesa.json



        cat <<'PYTHON' > scene-config.py

        import bpy

        bpy.context.scene.eevee.taa_render_samples = 32

        bpy.context.scene.cycles.samples = 32

        if ${if stdenv.isAarch64 then "True" else "False"}:

            bpy.context.scene.cycles.use_denoising = False

        bpy.context.scene.render.resolution_x = 100

        bpy.context.scene.render.resolution_y = 100

        bpy.context.scene.render.threads_mode = 'FIXED'

        bpy.context.scene.render.threads = 1

        PYTHON



        mkdir $out

        for engine in BLENDER_EEVEE CYCLES; do

          echo "Rendering with $engine..."

          # Beware that argument order matters

          ${finalAttrs.finalPackage}/bin/blender \

            --background \

            -noaudio \

            --factory-startup \

            --python-exit-code 1 \

            --python scene-config.py \

            --engine "$engine" \

            --render-output "$out/$engine" \

            --render-frame 1

        done

      '';

    };

  };



  meta = with lib; {

    description = "3D Creation/Animation/Publishing System";
@@ -198,4 +238,4 @@ stdenv.mkDerivation rec { 
    maintainers = with maintainers; [ goibhniu veprbl ];

    mainProgram = "blender";

  };

}
 
})