More render on demand fixes

[ffreyer]

Description

I kind of forgot about this. There are still a bunch of things in Scene that change the visuals, but do not trigger rerendering:

• clear which I also changed to an Observable for this
• backgroundcolor
• lighting. Though we can't react to push!ing into a Vector...
• visible
• scene insertion (Scene(parent, ...) doesn't insert the scene, but when it is actually inserted it should trigger a re-render.)
• SSAO changes

px_area seems to be unnecessary but I don't understand why. With

scene = Scene(resolution = (800, 600))
s = Scene(
    scene, 
    clear = true,
    backgroundcolor = :orange,
    px_area = map(r -> Rect2i(div.(widths(r), 4)[1], 50, div.(widths(r), 2)...), scene.px_area)
)
scene

the colored area is the same when resizing, whether it triggers a re-render or not.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• Added an entry in NEWS.md (for new features and breaking changes)
• Added or changed relevant sections in the documentation
• Added unit tests for new algorithms, conversion methods, etc.
• Added reference image tests for new plotting functions, recipes, visual options, etc.

[MakieBot]

Compile Times benchmark

Note, that these numbers may fluctuate on the CI servers, so take them with a grain of salt. All benchmark results are based on the mean time and negative percent mean faster than the base branch. Note, that GLMakie + WGLMakie run on an emulated GPU, so the runtime benchmark is much slower. Results are from running:

using_time = @ctime using Backend
# Compile time
create_time = @ctime fig = scatter(1:4; color=1:4, colormap=:turbo, markersize=20, visible=true)
display_time = @ctime Makie.colorbuffer(display(fig))
# Runtime
create_time = @benchmark fig = scatter(1:4; color=1:4, colormap=:turbo, markersize=20, visible=true)
display_time = @benchmark Makie.colorbuffer(display(fig))

	using	create	display	create	display
GLMakie	42.89s (41.91, 43.49) 0.55+-	20.60s (20.21, 20.90) 0.25+-	18.82s (18.53, 19.30) 0.28+-	12.80ms (12.59, 13.04) 0.18+-	159.71ms (154.84, 163.63) 2.85+-
master	43.14s (42.12, 44.07) 0.68+-	20.69s (20.31, 20.93) 0.22+-	18.85s (18.50, 19.32) 0.30+-	12.76ms (12.28, 13.05) 0.28+-	159.65ms (153.38, 163.10) 3.50+-
evaluation	-0.60%, -0.26s invariant (-0.42d, 0.45p, 0.61std)	-0.41%, -0.09s invariant (-0.36d, 0.52p, 0.24std)	-0.17%, -0.03s invariant (-0.11d, 0.84p, 0.29std)	+0.30%, 0.04ms invariant (0.16d, 0.76p, 0.23std)	+0.03%, 0.05ms invariant (0.02d, 0.98p, 3.17std)
CairoMakie	40.46s (39.76, 41.20) 0.50+-	20.99s (20.54, 21.72) 0.40+-	3.01s (2.82, 3.15) 0.11+-	13.33ms (11.37, 14.14) 0.93+-	6.54ms (5.46, 7.25) 0.54+-
master	40.14s (36.05, 42.22) 1.95+-	20.47s (18.96, 21.94) 1.09+-	2.93s (2.62, 3.07) 0.15+-	13.35ms (11.59, 14.01) 0.82+-	6.82ms (5.96, 7.20) 0.40+-
evaluation	+0.79%, 0.32s invariant (0.22d, 0.69p, 1.23std)	+2.48%, 0.52s invariant (0.63d, 0.27p, 0.75std)	+2.60%, 0.08s invariant (0.60d, 0.28p, 0.13std)	-0.19%, -0.02ms invariant (-0.03d, 0.96p, 0.87std)	-4.25%, -0.28ms invariant (-0.58d, 0.30p, 0.47std)
WGLMakie	51.03s (50.75, 51.19) 0.14+-	25.50s (25.21, 25.76) 0.16+-	25.51s (25.23, 26.24) 0.36+-	17.59ms (16.71, 19.42) 0.94+-	952.33ms (928.92, 982.59) 20.10+-
master	51.27s (50.99, 51.49) 0.19+-	25.53s (25.33, 25.81) 0.18+-	25.55s (25.43, 25.66) 0.09+-	17.37ms (16.75, 17.93) 0.42+-	950.96ms (923.75, 992.26) 26.40+-
evaluation	-0.46%, -0.23s faster ✓ (-1.39d, 0.02p, 0.17std)	-0.11%, -0.03s invariant (-0.17d, 0.76p, 0.17std)	-0.14%, -0.04s invariant (-0.14d, 0.80p, 0.22std)	+1.22%, 0.21ms invariant (0.30d, 0.59p, 0.68std)	+0.14%, 1.36ms invariant (0.06d, 0.92p, 23.25std)