pygfx_measure_empty_scene.py

import time
import numpy as np
import imageio.v2 as iio
import pygfx as gfx
from rendercanvas.offscreen import RenderCanvas


canvas = RenderCanvas(size=(1920, 1080), pixel_ratio=1)

renderer = gfx.renderers.WgpuRenderer(canvas,
    pixel_ratio=1,
    # pixel_filter='nearest'
    ppaa="fxaa"
    
)


im = iio.imread("/Users/almar/dev/py/ppaa-experiments/images_all/synthetic.png")

canvas.set_logical_size(im.shape[1], im.shape[0])

scene = gfx.Scene()
tex = gfx.Texture(im, dim=2)
mesh = gfx.Image(
    gfx.Geometry(grid=tex),
    gfx.ImageBasicMaterial(clim=(0, 255))
)
scene.add(mesh)

camera = gfx.OrthographicCamera()
camera.show_object(scene, match_aspect=True)
camera.local.scale_y = -1
canvas.request_draw(lambda: renderer.render(scene, camera))


im2 = np.asarray(canvas.draw())

print(np.allclose(im, im2[:,:,:3]))



t0 = time.perf_counter()
n = 0
while time.perf_counter() - t0 < 1:
    for _ in range(100):
        canvas.draw()
    n += 100
t1 = time.perf_counter()

print(f"{1000 * (t1 - t0)/n:0.1f} ms per frame")