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text.jl
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text.jl
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@testset "Glyph Collections" begin
using Makie.FreeTypeAbstraction
# Test whether Makie's padded signed distance field text matches
# FreeTypeAbstraction characters in terms of boundingbox
str = "^_lg"
chars = collect(str)
font = Makie.defaultfont()
scene = Scene()
campixel!(scene)
p = text!(scene, Point2f(30, 37), text = str, align = (:left, :baseline))
glyph_collection = p.plots[1][1][][]
# This doesn't work well because FreeTypeAbstraction doesn't quite scale
# linearly
# fta_glyphs = map(char -> renderface(font, char, 64), chars)
# unit_extents = map(fta_glyphs) do (img, extent)
# FontExtent(
# extent.vertical_bearing * 20f0 / 64f0,
# extent.horizontal_bearing * 20f0 / 64f0,
# extent.advance * 20f0 / 64f0,
# extent.scale * 20f0 / 64f0
# )
# end
# origins = let
# glyph_scale = p.textsize[] / 64
# cumsum(vcat(
# - glyph_scale * fta_glyphs[1][2].horizontal_bearing[1],
# [glyph_scale * fta_glyphs[i][2].advance[1] for i in 1:3]
# ))
# end
# This is just repeating code from Makie
unit_extents = [FreeTypeAbstraction.get_extent(font, char) for char in chars]
origins = cumsum(20f0 * Float32[
0,
unit_extents[1].advance[1],
unit_extents[2].advance[1],
unit_extents[3].advance[1]
])
@test glyph_collection isa Makie.GlyphCollection
@test glyph_collection.glyphs == FreeTypeAbstraction.glyph_index.(font, chars)
@test glyph_collection.fonts == [font for _ in 1:4]
@test all(isapprox.(glyph_collection.origins, [Point3f(x, 0, 0) for x in origins], atol = 1e-10))
@test glyph_collection.scales.sv == [Vec2f(p.textsize[]) for _ in 1:4]
@test glyph_collection.rotations.sv == [Quaternionf(0,0,0,1) for _ in 1:4]
@test glyph_collection.colors.sv == [RGBAf(0,0,0,1) for _ in 1:4]
@test glyph_collection.strokecolors.sv == [RGBAf(0,0,0,0) for _ in 1:4]
@test glyph_collection.strokewidths.sv == Float32[0, 0, 0, 0]
makie_hi_bb = Makie.height_insensitive_boundingbox.(glyph_collection.extents)
makie_hi_bb_wa = Makie.height_insensitive_boundingbox_with_advance.(glyph_collection.extents)
fta_hi_bb = FreeTypeAbstraction.height_insensitive_boundingbox.(unit_extents, Ref(font))
fta_ha = FreeTypeAbstraction.hadvance.(unit_extents)
@test makie_hi_bb == fta_hi_bb
@test fta_ha == [bb.origin[1] + bb.widths[1] for bb in makie_hi_bb_wa]
# Test quad data
positions, char_offsets, quad_offsets, uvs, scales = Makie.text_quads(
to_ndim(Point3f, p.position[], 0), glyph_collection,
Vec2f(0), Makie.transform_func_obs(scene)[]
)
# Also doesn't work
# fta_offsets = map(fta_glyphs) do (img, extent)
# (extent.horizontal_bearing .- Makie.GLYPH_PADDING[]) * p.textsize[] /
# Makie.PIXELSIZE_IN_ATLAS[]
# end
# fta_scales = map(fta_glyphs) do (img, extent)
# (extent.scale .+ 2 * Makie.GLYPH_PADDING[]) * p.textsize[] /
# Makie.PIXELSIZE_IN_ATLAS[]
# end
fta_quad_offsets = map(chars) do c
mini = FreeTypeAbstraction.metrics_bb(c, font, 20.0)[1] |> minimum
Vec2f(mini .- Makie.GLYPH_PADDING[] * 20.0 / Makie.PIXELSIZE_IN_ATLAS[])
end
fta_scales = map(chars) do c
mini = FreeTypeAbstraction.metrics_bb(c, font, 20.0)[1] |> widths
Vec2f(mini .+ 2 * Makie.GLYPH_PADDING[] * 20.0 / Makie.PIXELSIZE_IN_ATLAS[])
end
@test all(isequal(to_ndim(Point3f, p.position[], 0f0)), positions)
@test char_offsets == glyph_collection.origins
@test quad_offsets == fta_quad_offsets
@test scales == fta_scales
end
@testset "old text syntax" begin
text("text", position = Point2f(0, 0))
text(["text"], position = [Point2f(0, 0)])
text(["text", "text"], position = [Point2f(0, 0), Point2f(1, 1)])
text(collect(zip(["text", "text"], [Point2f(0, 0), Point2f(1, 1)])))
text(L"text", position = Point2f(0, 0))
text([L"text"], position = [Point2f(0, 0)])
text([L"text", L"text"], position = [Point2f(0, 0), Point2f(1, 1)])
text(collect(zip([L"text", L"text"], [Point2f(0, 0), Point2f(1, 1)])))
end