fix heatmapshader for ranges

[SimonDanisch]

No description provided.

[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	4.61s (4.57, 4.64) 0.03+-	108.26ms (106.93, 108.91) 0.83+-	410.96ms (407.00, 413.87) 2.48+-	9.05ms (8.85, 9.30) 0.19+-	25.87ms (25.62, 26.95) 0.48+-
master	4.64s (4.62, 4.67) 0.02+-	108.84ms (108.04, 109.87) 0.61+-	414.48ms (410.91, 417.08) 2.08+-	9.38ms (9.27, 9.48) 0.07+-	25.68ms (25.65, 25.75) 0.03+-
evaluation	1.01x faster ✓, -0.03s (-1.48d, 0.02p, 0.02std)	1.01x invariant, -0.59ms (-0.81d, 0.16p, 0.72std)	1.01x faster ✓, -3.52ms (-1.54d, 0.01p, 2.28std)	1.04x faster ✓, -0.34ms (-2.38d, 0.00p, 0.13std)	0.99x invariant, 0.18ms (0.54d, 0.35p, 0.26std)
CairoMakie	4.41s (4.38, 4.45) 0.02+-	110.05ms (108.11, 114.19) 2.34+-	164.93ms (163.24, 166.19) 1.10+-	8.92ms (8.89, 8.95) 0.02+-	1.12ms (1.12, 1.13) 0.01+-
master	4.40s (4.37, 4.43) 0.02+-	110.13ms (108.46, 112.97) 1.69+-	170.17ms (163.12, 197.05) 12.01+-	8.85ms (8.78, 8.92) 0.06+-	1.12ms (1.12, 1.14) 0.01+-
evaluation	1.00x invariant, 0.02s (0.76d, 0.18p, 0.02std)	1.00x invariant, -0.09ms (-0.04d, 0.94p, 2.02std)	1.03x invariant, -5.24ms (-0.61d, 0.29p, 6.56std)	0.99x slower X, 0.07ms (1.56d, 0.02p, 0.04std)	1.00x invariant, -0.0ms (-0.02d, 0.97p, 0.01std)
WGLMakie	5.24s (5.14, 5.33) 0.08+-	112.03ms (109.84, 116.81) 2.33+-	9.16s (9.06, 9.23) 0.07+-	11.74ms (11.42, 12.04) 0.25+-	119.51ms (115.91, 124.65) 3.00+-
master	5.22s (5.15, 5.26) 0.04+-	111.85ms (110.43, 114.09) 1.40+-	9.26s (9.04, 9.41) 0.11+-	11.99ms (11.36, 14.05) 0.92+-	118.28ms (113.80, 122.91) 3.43+-
evaluation	1.00x invariant, 0.02s (0.41d, 0.46p, 0.06std)	1.00x invariant, 0.18ms (0.09d, 0.87p, 1.86std)	1.01x invariant, -0.1s (-1.05d, 0.08p, 0.09std)	1.02x invariant, -0.25ms (-0.38d, 0.51p, 0.59std)	0.99x invariant, 1.23ms (0.38d, 0.49p, 3.21std)