Improve picking tests

[ffreyer]

Description

Changes:

• make GLMakie check for heatmap path less brittle
• add check for WGLMakie
• move test to referenceimage tests
• add refimg (with set px_per_unit), testing pick(scene, ::Rect2i) for the full scene
• fix WGLMakie pick(scene, ::Rect2f)

Type of change

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

Checklist

• Added an entry in CHANGELOG.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(fig)

	using	create	display	create	display
GLMakie	5.21s (5.09, 5.28) 0.07+-	115.33ms (109.43, 127.66) 5.86+-	501.07ms (422.55, 688.22) 116.04+-	9.31ms (8.26, 9.88) 0.60+-	26.37ms (25.81, 26.69) 0.29+-
master	5.26s (5.16, 5.34) 0.08+-	115.43ms (110.31, 123.37) 4.48+-	430.03ms (416.23, 450.84) 11.22+-	9.51ms (8.48, 9.84) 0.48+-	26.43ms (25.98, 26.65) 0.22+-
evaluation	1.01x invariant, -0.04s (-0.61d, 0.28p, 0.07std)	1.00x invariant, -0.1ms (-0.02d, 0.97p, 5.17std)	0.86x noisy🤷‍♀️, 71.04ms (0.86d, 0.16p, 63.63std)	1.02x invariant, -0.2ms (-0.37d, 0.51p, 0.54std)	1.00x invariant, -0.05ms (-0.21d, 0.70p, 0.26std)
CairoMakie	5.00s (4.85, 5.10) 0.10+-	110.46ms (108.79, 111.85) 1.13+-	168.11ms (165.18, 173.96) 2.92+-	9.30ms (9.05, 9.79) 0.27+-	1.18ms (1.14, 1.23) 0.03+-
master	4.89s (4.85, 4.91) 0.02+-	111.59ms (108.99, 115.76) 2.50+-	171.13ms (166.77, 187.22) 7.27+-	9.28ms (9.08, 9.53) 0.20+-	1.19ms (1.14, 1.22) 0.04+-
evaluation	0.98x slower X, 0.11s (1.47d, 0.03p, 0.06std)	1.01x invariant, -1.13ms (-0.58d, 0.31p, 1.82std)	1.02x invariant, -3.01ms (-0.54d, 0.34p, 5.09std)	1.00x invariant, 0.02ms (0.09d, 0.88p, 0.24std)	1.01x invariant, -0.01ms (-0.17d, 0.76p, 0.04std)
WGLMakie	5.54s (5.42, 5.64) 0.08+-	113.89ms (110.13, 124.31) 5.06+-	5.26s (4.99, 5.54) 0.25+-	12.46ms (12.02, 13.61) 0.54+-	136.32ms (127.49, 157.99) 10.36+-
master	5.68s (5.61, 5.78) 0.07+-	110.81ms (109.19, 112.43) 1.26+-	5.03s (4.94, 5.17) 0.09+-	12.50ms (12.24, 12.93) 0.28+-	133.68ms (126.58, 144.07) 6.02+-
evaluation	1.03x faster ✓, -0.15s (-2.02d, 0.00p, 0.07std)	0.97x invariant, 3.09ms (0.84d, 0.16p, 3.16std)	0.96x invariant, 0.22s (1.18d, 0.06p, 0.17std)	1.00x invariant, -0.04ms (-0.09d, 0.87p, 0.41std)	0.98x invariant, 2.64ms (0.31d, 0.57p, 8.19std)