From f2f916853d6ac5735a0ac25faf58317c4f7152a5 Mon Sep 17 00:00:00 2001
From: Erik Schnetter <schnetter@gmail.com>
Date: Wed, 9 Jul 2025 17:09:36 -0400
Subject: [PATCH 1/4] Add OctantCanvas

---
 docs/src/dev.md            |   9 +-
 docs/src/index.md          |   2 +-
 src/UnicodePlots.jl        |   2 +
 src/canvas/octantcanvas.jl | 305 +++++++++++++++++++++++++++++++++++++
 test/runtests.jl           |   4 +
 test/tst_scatterplot.jl    |   2 +-
 6 files changed, 319 insertions(+), 5 deletions(-)
 create mode 100644 src/canvas/octantcanvas.jl

diff --git a/docs/src/dev.md b/docs/src/dev.md
index e6238406..e795b756 100644
--- a/docs/src/dev.md
+++ b/docs/src/dev.md
@@ -33,10 +33,13 @@ Plot(canvas)
 The following types of `Canvas` are implemented:
 
 - **BrailleCanvas**:
-  This type of canvas is probably the one with the highest resolution for `Unicode` plotting. It essentially uses the Unicode characters of the [Braille](https://en.wikipedia.org/wiki/Braille) symbols as pixels. This effectively turns every character into eight pixels that can individually be manipulated using binary operations.
+  This type of canvas is probably one of the two with the highest resolution for `Unicode` plotting. It essentially uses the Unicode characters of the [Braille](https://en.wikipedia.org/wiki/Braille) symbols as pixels. This effectively turns every character into eight pixels that can individually be manipulated using binary operations.
+
+- **OctantCanvas**:
+  This type of canvas is the other with the highest resolution for `Unicode` plotting. It essentially uses the Unicode characters of the [octant](https://unicode.org/charts/PDF/Unicode-16.0/U160-1CC00.pdf) symbols as pixels. This effectively turns every character into eight pixels that can individually be manipulated using binary operations. (Unicode octants require support for Unicode 16 which was released in 2024. Some terminal emulators draw these characters directly, others use a font for rendering. If neither supports it then this canvas will not work.) If OctantCanvas is working then it should look better than BrailleCanvas.
 
 - **BlockCanvas**:
-  This canvas is also `Unicode` based. It has half the resolution of the BrailleCanvas. In contrast to `BrailleCanvas`, the pixels don't have visible spacing between them. This canvas effectively turns every character into four pixels that can individually be manipulated using binary operations.
+  This canvas is also `Unicode` based. It has half the resolution of the BrailleCanvas or OctantCanvas. In contrast to `BrailleCanvas`, the pixels don't have visible spacing between them. This canvas effectively turns every character into four pixels that can individually be manipulated using binary operations.
 
 - **HeatmapCanvas**:
   This canvas is also `Unicode` based. It has half the resolution of the `BlockCanvas`. This canvas effectively turns every character into two color pixels, using the foreground and background terminal colors. As such, the number of rows of the canvas is half the number of `y` coordinates being displayed.
@@ -45,7 +48,7 @@ The following types of `Canvas` are implemented:
   These two canvas utilizes only standard `ASCII` character for drawing. Naturally, it doesn't look quite as nice as the Unicode-based ones. However, in some situations it might yield better results. Printing plots to a file is one of those situations.
 
 - **DensityCanvas**:
-  Unlike the `BrailleCanvas`, the density canvas does not simply mark a "pixel" as set. Instead it increments a counter per character that keeps track of the frequency of pixels drawn in that character. Together with a variable that keeps track of the maximum frequency, the canvas can thus draw the density of data-points.
+  Unlike the `BrailleCanvas` or `OctantCanvas`, the density canvas does not simply mark a "pixel" as set. Instead it increments a counter per character that keeps track of the frequency of pixels drawn in that character. Together with a variable that keeps track of the maximum frequency, the canvas can thus draw the density of data-points.
 
 - **BarplotGraphics**:
   This graphics area is special in that it does not support any pixel manipulation. It is essentially the barplot without decorations but the numbers. It does only support one method `addrow!` which allows the user to add additional bars to the graphics object.
diff --git a/docs/src/index.md b/docs/src/index.md
index 68648ac2..d5307da6 100644
--- a/docs/src/index.md
+++ b/docs/src/index.md
@@ -22,7 +22,7 @@ lineplot([-1, 2, 3, 7], [-1, 2, 9, 4], title="Example", name="my line", xlabel="
 
 There are other types of `Canvas` available (see section [Low-level Interface](https://github.com/JuliaPlots/UnicodePlots.jl#low-level-interface)).
 
-In some situations, such as printing to a file, using `AsciiCanvas`, `DotCanvas` or `BlockCanvas` might lead to better results:
+In some situations, such as printing to a file, using `AsciiCanvas`, `DotCanvas`, `BlockCanvas` or `OctantCanvas` might lead to better results:
 
 ```@example intro
 plt = lineplot([-1, 2, 3, 7], [-1, 2, 9, 4], title="Example", name="my line",
diff --git a/src/UnicodePlots.jl b/src/UnicodePlots.jl
index 6d748bf6..889c7376 100644
--- a/src/UnicodePlots.jl
+++ b/src/UnicodePlots.jl
@@ -23,6 +23,7 @@ export Plot,
     BoxplotGraphics,
     GraphicsArea,
     BrailleCanvas,
+    OctantCanvas,
     DensityCanvas,
     HeatmapCanvas,
     BlockCanvas,
@@ -84,6 +85,7 @@ include("graphics/imagegraphics.jl")
 include("canvas.jl")
 include("canvas/lookupcanvas.jl")
 include("canvas/braillecanvas.jl")
+include("canvas/octantcanvas.jl")
 include("canvas/densitycanvas.jl")
 include("canvas/blockcanvas.jl")
 include("canvas/asciicanvas.jl")
diff --git a/src/canvas/octantcanvas.jl b/src/canvas/octantcanvas.jl
new file mode 100644
index 00000000..600e9f89
--- /dev/null
+++ b/src/canvas/octantcanvas.jl
@@ -0,0 +1,305 @@
+"""
+The `OctantCanvas` is also Unicode-based.
+It has the same resolution as `BrailleCanvas`.
+In contrast to BrailleCanvas, the pixels don't have visible spacing between them.
+This canvas effectively turns every character into eight pixels that can individually be manipulated using binary operations.
+"""
+struct OctantCanvas{YS <: Function, XS <: Function} <: LookupCanvas
+    grid::Transpose{UInt16, Matrix{UInt16}}
+    colors::Transpose{ColorType, Matrix{ColorType}}
+    visible::Bool
+    blend::Bool
+    yflip::Bool
+    xflip::Bool
+    pixel_height::Int
+    pixel_width::Int
+    origin_y::Float64
+    origin_x::Float64
+    height::Float64
+    width::Float64
+    min_max::NTuple{2, UnicodeType}
+    yscale::YS
+    xscale::XS
+end
+
+const OCTANT_SIGNS = [
+    0b00000001 0b00000010
+    0b00000100 0b00001000
+    0b00010000 0b00100000
+    0b01000000 0b10000000
+]
+
+const N_OCTANT = grid_type(OctantCanvas)(256)
+const OCTANT_DECODE = Vector{Char}(undef, typemax(N_OCTANT))
+
+# The array is stored according to the octant bit pattern:
+#     0 1
+#     2 3
+#     4 5
+#     6 7
+const OCTANT_DECODE = Char[0x000000A0, # NO-BREAK SPACE
+                           0x0001CEA8, # LEFT HALF UPPER ONE QUARTER BLOCK
+                           0x0001CEAB, # RIGHT HALF UPPER ONE QUARTER BLOCK
+                           0x0001FB82, # UPPER ONE QUARTER BLOCK
+                           0x0001CD00, # BLOCK OCTANT-3
+                           0x00002598, # QUADRANT UPPER LEFT
+                           0x0001CD01, # BLOCK OCTANT-23
+                           0x0001CD02, # BLOCK OCTANT-123
+                           0x0001CD03, # BLOCK OCTANT-4
+                           0x0001CD04, # BLOCK OCTANT-14
+                           0x0000259D, # QUADRANT UPPER RIGHT
+                           0x0001CD05, # BLOCK OCTANT-124
+                           0x0001CD06, # BLOCK OCTANT-34
+                           0x0001CD07, # BLOCK OCTANT-134
+                           0x0001CD08, # BLOCK OCTANT-234
+                           0x00002580, # UPPER HALF BLOCK
+                           0x0001CD09, # BLOCK OCTANT-5
+                           0x0001CD0A, # BLOCK OCTANT-15
+                           0x0001CD0B, # BLOCK OCTANT-25
+                           0x0001CD0C, # BLOCK OCTANT-125
+                           0x0001FBE6, # MIDDLE LEFT ONE QUARTER BLOCK
+                           0x0001CD0D, # BLOCK OCTANT-135
+                           0x0001CD0E, # BLOCK OCTANT-235
+                           0x0001CD0F, # BLOCK OCTANT-1235
+                           0x0001CD10, # BLOCK OCTANT-45
+                           0x0001CD11, # BLOCK OCTANT-145
+                           0x0001CD12, # BLOCK OCTANT-245
+                           0x0001CD13, # BLOCK OCTANT-1245
+                           0x0001CD14, # BLOCK OCTANT-345
+                           0x0001CD15, # BLOCK OCTANT-1345
+                           0x0001CD16, # BLOCK OCTANT-2345
+                           0x0001CD17, # BLOCK OCTANT-12345
+                           0x0001CD18, # BLOCK OCTANT-6
+                           0x0001CD19, # BLOCK OCTANT-16
+                           0x0001CD1A, # BLOCK OCTANT-26
+                           0x0001CD1B, # BLOCK OCTANT-126
+                           0x0001CD1C, # BLOCK OCTANT-36
+                           0x0001CD1D, # BLOCK OCTANT-136
+                           0x0001CD1E, # BLOCK OCTANT-236
+                           0x0001CD1F, # BLOCK OCTANT-1236
+                           0x0001FBE7, # MIDDLE RIGHT ONE QUARTER BLOCK
+                           0x0001CD20, # BLOCK OCTANT-146
+                           0x0001CD21, # BLOCK OCTANT-246
+                           0x0001CD22, # BLOCK OCTANT-1246
+                           0x0001CD23, # BLOCK OCTANT-346
+                           0x0001CD24, # BLOCK OCTANT-1346
+                           0x0001CD25, # BLOCK OCTANT-2346
+                           0x0001CD26, # BLOCK OCTANT-12346
+                           0x0001CD27, # BLOCK OCTANT-56
+                           0x0001CD28, # BLOCK OCTANT-156
+                           0x0001CD29, # BLOCK OCTANT-256
+                           0x0001CD2A, # BLOCK OCTANT-1256
+                           0x0001CD2B, # BLOCK OCTANT-356
+                           0x0001CD2C, # BLOCK OCTANT-1356
+                           0x0001CD2D, # BLOCK OCTANT-2356
+                           0x0001CD2E, # BLOCK OCTANT-12356
+                           0x0001CD2F, # BLOCK OCTANT-456
+                           0x0001CD30, # BLOCK OCTANT-1456
+                           0x0001CD31, # BLOCK OCTANT-2456
+                           0x0001CD32, # BLOCK OCTANT-12456
+                           0x0001CD33, # BLOCK OCTANT-3456
+                           0x0001CD34, # BLOCK OCTANT-13456
+                           0x0001CD35, # BLOCK OCTANT-23456
+                           0x0001FB85, # UPPER THREE QUARTERS BLOCK
+                           0x0001CEA3, # LEFT HALF LOWER ONE QUARTER BLOCK
+                           0x0001CD36, # BLOCK OCTANT-17
+                           0x0001CD37, # BLOCK OCTANT-27
+                           0x0001CD38, # BLOCK OCTANT-127
+                           0x0001CD39, # BLOCK OCTANT-37
+                           0x0001CD3A, # BLOCK OCTANT-137
+                           0x0001CD3B, # BLOCK OCTANT-237
+                           0x0001CD3C, # BLOCK OCTANT-1237
+                           0x0001CD3D, # BLOCK OCTANT-47
+                           0x0001CD3E, # BLOCK OCTANT-147
+                           0x0001CD3F, # BLOCK OCTANT-247
+                           0x0001CD40, # BLOCK OCTANT-1247
+                           0x0001CD41, # BLOCK OCTANT-347
+                           0x0001CD42, # BLOCK OCTANT-1347
+                           0x0001CD43, # BLOCK OCTANT-2347
+                           0x0001CD44, # BLOCK OCTANT-12347
+                           0x00002596, # QUADRANT LOWER LEFT
+                           0x0001CD45, # BLOCK OCTANT-157
+                           0x0001CD46, # BLOCK OCTANT-257
+                           0x0001CD47, # BLOCK OCTANT-1257
+                           0x0001CD48, # BLOCK OCTANT-357
+                           0x0000258C, # LEFT HALF BLOCK
+                           0x0001CD49, # BLOCK OCTANT-2357
+                           0x0001CD4A, # BLOCK OCTANT-12357
+                           0x0001CD4B, # BLOCK OCTANT-457
+                           0x0001CD4C, # BLOCK OCTANT-1457
+                           0x0000259E, # QUADRANT UPPER RIGHT AND LOWER LEFT
+                           0x0001CD4D, # BLOCK OCTANT-12457
+                           0x0001CD4E, # BLOCK OCTANT-3457
+                           0x0001CD4F, # BLOCK OCTANT-13457
+                           0x0001CD50, # BLOCK OCTANT-23457
+                           0x0000259B, # QUADRANT UPPER LEFT AND UPPER RIGHT AND LOWER LEFT
+                           0x0001CD51, # BLOCK OCTANT-67
+                           0x0001CD52, # BLOCK OCTANT-167
+                           0x0001CD53, # BLOCK OCTANT-267
+                           0x0001CD54, # BLOCK OCTANT-1267
+                           0x0001CD55, # BLOCK OCTANT-367
+                           0x0001CD56, # BLOCK OCTANT-1367
+                           0x0001CD57, # BLOCK OCTANT-2367
+                           0x0001CD58, # BLOCK OCTANT-12367
+                           0x0001CD59, # BLOCK OCTANT-467
+                           0x0001CD5A, # BLOCK OCTANT-1467
+                           0x0001CD5B, # BLOCK OCTANT-2467
+                           0x0001CD5C, # BLOCK OCTANT-12467
+                           0x0001CD5D, # BLOCK OCTANT-3467
+                           0x0001CD5E, # BLOCK OCTANT-13467
+                           0x0001CD5F, # BLOCK OCTANT-23467
+                           0x0001CD60, # BLOCK OCTANT-123467
+                           0x0001CD61, # BLOCK OCTANT-567
+                           0x0001CD62, # BLOCK OCTANT-1567
+                           0x0001CD63, # BLOCK OCTANT-2567
+                           0x0001CD64, # BLOCK OCTANT-12567
+                           0x0001CD65, # BLOCK OCTANT-3567
+                           0x0001CD66, # BLOCK OCTANT-13567
+                           0x0001CD67, # BLOCK OCTANT-23567
+                           0x0001CD68, # BLOCK OCTANT-123567
+                           0x0001CD69, # BLOCK OCTANT-4567
+                           0x0001CD6A, # BLOCK OCTANT-14567
+                           0x0001CD6B, # BLOCK OCTANT-24567
+                           0x0001CD6C, # BLOCK OCTANT-124567
+                           0x0001CD6D, # BLOCK OCTANT-34567
+                           0x0001CD6E, # BLOCK OCTANT-134567
+                           0x0001CD6F, # BLOCK OCTANT-234567
+                           0x0001CD70, # BLOCK OCTANT-1234567
+                           0x0001CEA0, # RIGHT HALF LOWER ONE QUARTER BLOCK
+                           0x0001CD71, # BLOCK OCTANT-18
+                           0x0001CD72, # BLOCK OCTANT-28
+                           0x0001CD73, # BLOCK OCTANT-128
+                           0x0001CD74, # BLOCK OCTANT-38
+                           0x0001CD75, # BLOCK OCTANT-138
+                           0x0001CD76, # BLOCK OCTANT-238
+                           0x0001CD77, # BLOCK OCTANT-1238
+                           0x0001CD78, # BLOCK OCTANT-48
+                           0x0001CD79, # BLOCK OCTANT-148
+                           0x0001CD7A, # BLOCK OCTANT-248
+                           0x0001CD7B, # BLOCK OCTANT-1248
+                           0x0001CD7C, # BLOCK OCTANT-348
+                           0x0001CD7D, # BLOCK OCTANT-1348
+                           0x0001CD7E, # BLOCK OCTANT-2348
+                           0x0001CD7F, # BLOCK OCTANT-12348
+                           0x0001CD80, # BLOCK OCTANT-58
+                           0x0001CD81, # BLOCK OCTANT-158
+                           0x0001CD82, # BLOCK OCTANT-258
+                           0x0001CD83, # BLOCK OCTANT-1258
+                           0x0001CD84, # BLOCK OCTANT-358
+                           0x0001CD85, # BLOCK OCTANT-1358
+                           0x0001CD86, # BLOCK OCTANT-2358
+                           0x0001CD87, # BLOCK OCTANT-12358
+                           0x0001CD88, # BLOCK OCTANT-458
+                           0x0001CD89, # BLOCK OCTANT-1458
+                           0x0001CD8A, # BLOCK OCTANT-2458
+                           0x0001CD8B, # BLOCK OCTANT-12458
+                           0x0001CD8C, # BLOCK OCTANT-3458
+                           0x0001CD8D, # BLOCK OCTANT-13458
+                           0x0001CD8E, # BLOCK OCTANT-23458
+                           0x0001CD8F, # BLOCK OCTANT-123458
+                           0x00002597, # QUADRANT LOWER RIGHT
+                           0x0001CD90, # BLOCK OCTANT-168
+                           0x0001CD91, # BLOCK OCTANT-268
+                           0x0001CD92, # BLOCK OCTANT-1268
+                           0x0001CD93, # BLOCK OCTANT-368
+                           0x0000259A, # QUADRANT UPPER LEFT AND LOWER RIGHT
+                           0x0001CD94, # BLOCK OCTANT-2368
+                           0x0001CD95, # BLOCK OCTANT-12368
+                           0x0001CD96, # BLOCK OCTANT-468
+                           0x0001CD97, # BLOCK OCTANT-1468
+                           0x00002590, # RIGHT HALF BLOCK
+                           0x0001CD98, # BLOCK OCTANT-12468
+                           0x0001CD99, # BLOCK OCTANT-3468
+                           0x0001CD9A, # BLOCK OCTANT-13468
+                           0x0001CD9B, # BLOCK OCTANT-23468
+                           0x0000259C, # QUADRANT UPPER LEFT AND UPPER RIGHT AND LOWER RIGHT
+                           0x0001CD9C, # BLOCK OCTANT-568
+                           0x0001CD9D, # BLOCK OCTANT-1568
+                           0x0001CD9E, # BLOCK OCTANT-2568
+                           0x0001CD9F, # BLOCK OCTANT-12568
+                           0x0001CDA0, # BLOCK OCTANT-3568
+                           0x0001CDA1, # BLOCK OCTANT-13568
+                           0x0001CDA2, # BLOCK OCTANT-23568
+                           0x0001CDA3, # BLOCK OCTANT-123568
+                           0x0001CDA4, # BLOCK OCTANT-4568
+                           0x0001CDA5, # BLOCK OCTANT-14568
+                           0x0001CDA6, # BLOCK OCTANT-24568
+                           0x0001CDA7, # BLOCK OCTANT-124568
+                           0x0001CDA8, # BLOCK OCTANT-34568
+                           0x0001CDA9, # BLOCK OCTANT-134568
+                           0x0001CDAA, # BLOCK OCTANT-234568
+                           0x0001CDAB, # BLOCK OCTANT-1234568
+                           0x00002582, # LOWER ONE QUARTER BLOCK
+                           0x0001CDAC, # BLOCK OCTANT-178
+                           0x0001CDAD, # BLOCK OCTANT-278
+                           0x0001CDAE, # BLOCK OCTANT-1278
+                           0x0001CDAF, # BLOCK OCTANT-378
+                           0x0001CDB0, # BLOCK OCTANT-1378
+                           0x0001CDB1, # BLOCK OCTANT-2378
+                           0x0001CDB2, # BLOCK OCTANT-12378
+                           0x0001CDB3, # BLOCK OCTANT-478
+                           0x0001CDB4, # BLOCK OCTANT-1478
+                           0x0001CDB5, # BLOCK OCTANT-2478
+                           0x0001CDB6, # BLOCK OCTANT-12478
+                           0x0001CDB7, # BLOCK OCTANT-3478
+                           0x0001CDB8, # BLOCK OCTANT-13478
+                           0x0001CDB9, # BLOCK OCTANT-23478
+                           0x0001CDBA, # BLOCK OCTANT-123478
+                           0x0001CDBB, # BLOCK OCTANT-578
+                           0x0001CDBC, # BLOCK OCTANT-1578
+                           0x0001CDBD, # BLOCK OCTANT-2578
+                           0x0001CDBE, # BLOCK OCTANT-12578
+                           0x0001CDBF, # BLOCK OCTANT-3578
+                           0x0001CDC0, # BLOCK OCTANT-13578
+                           0x0001CDC1, # BLOCK OCTANT-23578
+                           0x0001CDC2, # BLOCK OCTANT-123578
+                           0x0001CDC3, # BLOCK OCTANT-4578
+                           0x0001CDC4, # BLOCK OCTANT-14578
+                           0x0001CDC5, # BLOCK OCTANT-24578
+                           0x0001CDC6, # BLOCK OCTANT-124578
+                           0x0001CDC7, # BLOCK OCTANT-34578
+                           0x0001CDC8, # BLOCK OCTANT-134578
+                           0x0001CDC9, # BLOCK OCTANT-234578
+                           0x0001CDCA, # BLOCK OCTANT-1234578
+                           0x0001CDCB, # BLOCK OCTANT-678
+                           0x0001CDCC, # BLOCK OCTANT-1678
+                           0x0001CDCD, # BLOCK OCTANT-2678
+                           0x0001CDCE, # BLOCK OCTANT-12678
+                           0x0001CDCF, # BLOCK OCTANT-3678
+                           0x0001CDD0, # BLOCK OCTANT-13678
+                           0x0001CDD1, # BLOCK OCTANT-23678
+                           0x0001CDD2, # BLOCK OCTANT-123678
+                           0x0001CDD3, # BLOCK OCTANT-4678
+                           0x0001CDD4, # BLOCK OCTANT-14678
+                           0x0001CDD5, # BLOCK OCTANT-24678
+                           0x0001CDD6, # BLOCK OCTANT-124678
+                           0x0001CDD7, # BLOCK OCTANT-34678
+                           0x0001CDD8, # BLOCK OCTANT-134678
+                           0x0001CDD9, # BLOCK OCTANT-234678
+                           0x0001CDDA, # BLOCK OCTANT-1234678
+                           0x00002584, # LOWER HALF BLOCK
+                           0x0001CDDB, # BLOCK OCTANT-15678
+                           0x0001CDDC, # BLOCK OCTANT-25678
+                           0x0001CDDD, # BLOCK OCTANT-125678
+                           0x0001CDDE, # BLOCK OCTANT-35678
+                           0x00002599, # QUADRANT UPPER LEFT AND LOWER LEFT AND LOWER RIGHT
+                           0x0001CDDF, # BLOCK OCTANT-235678
+                           0x0001CDE0, # BLOCK OCTANT-1235678
+                           0x0001CDE1, # BLOCK OCTANT-45678
+                           0x0001CDE2, # BLOCK OCTANT-145678
+                           0x0000259F, # QUADRANT UPPER RIGHT AND LOWER LEFT AND LOWER RIGHT
+                           0x0001CDE3, # BLOCK OCTANT-1245678
+                           0x00002586, # LOWER THREE QUARTERS BLOCK
+                           0x0001CDE4, # BLOCK OCTANT-1345678
+                           0x0001CDE5, # BLOCK OCTANT-2345678
+                           0x00002588] # FULL BLOCK
+
+@inline x_pixel_per_char(::Type{<:OctantCanvas}) = 2
+@inline y_pixel_per_char(::Type{<:OctantCanvas}) = 4
+
+@inline lookup_encode(::OctantCanvas) = OCTANT_SIGNS
+@inline lookup_decode(::OctantCanvas) = OCTANT_DECODE
+@inline lookup_offset(::OctantCanvas) = N_OCTANT
+
+OctantCanvas(args...; kw...) =
+    CreateLookupCanvas(OctantCanvas, (0b00000000, 0b11111111), args...; kw...)
diff --git a/test/runtests.jl b/test/runtests.jl
index 68b31b57..3f560ab4 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -111,6 +111,10 @@ macro binf(ex)
     return :(@inferred(Plot{BrailleCanvas{ID, ID}}, $ex)) |> esc
 end
 
+macro oinf(ex)
+    return :(@inferred(Plot{OctantCanvas{ID, ID}}, $ex)) |> esc
+end
+
 macro hinf(ex)
     return :(@inferred(Plot{HeatmapCanvas{ID, ID}}, $ex)) |> esc
 end
diff --git a/test/tst_scatterplot.jl b/test/tst_scatterplot.jl
index 1af80f97..a1ed1597 100644
--- a/test/tst_scatterplot.jl
+++ b/test/tst_scatterplot.jl
@@ -14,7 +14,7 @@ end
 
 @testset "boundaries" begin
     # tests that the two points are drawn correctly on the canvas
-    for canvas in (BrailleCanvas, AsciiCanvas, DotCanvas)
+    for canvas in (BrailleCanvas, OctantCanvas, AsciiCanvas, DotCanvas)
         for width in (20:10:60), height in (10:5:30)
             p = scatterplot(1:2, reverse(1:2); height, width, canvas)
             @test first(p.graphics.grid) != UnicodePlots.blank(p.graphics)

From afc13dd34dc00c8dc84b8d606e9f6584da8c97f9 Mon Sep 17 00:00:00 2001
From: Erik Schnetter <schnetter@gmail.com>
Date: Wed, 9 Jul 2025 17:12:07 -0400
Subject: [PATCH 2/4] Reformat code

---
 src/canvas/octantcanvas.jl | 514 +++++++++++++++++++------------------
 1 file changed, 258 insertions(+), 256 deletions(-)

diff --git a/src/canvas/octantcanvas.jl b/src/canvas/octantcanvas.jl
index 600e9f89..804bf668 100644
--- a/src/canvas/octantcanvas.jl
+++ b/src/canvas/octantcanvas.jl
@@ -37,262 +37,264 @@ const OCTANT_DECODE = Vector{Char}(undef, typemax(N_OCTANT))
 #     2 3
 #     4 5
 #     6 7
-const OCTANT_DECODE = Char[0x000000A0, # NO-BREAK SPACE
-                           0x0001CEA8, # LEFT HALF UPPER ONE QUARTER BLOCK
-                           0x0001CEAB, # RIGHT HALF UPPER ONE QUARTER BLOCK
-                           0x0001FB82, # UPPER ONE QUARTER BLOCK
-                           0x0001CD00, # BLOCK OCTANT-3
-                           0x00002598, # QUADRANT UPPER LEFT
-                           0x0001CD01, # BLOCK OCTANT-23
-                           0x0001CD02, # BLOCK OCTANT-123
-                           0x0001CD03, # BLOCK OCTANT-4
-                           0x0001CD04, # BLOCK OCTANT-14
-                           0x0000259D, # QUADRANT UPPER RIGHT
-                           0x0001CD05, # BLOCK OCTANT-124
-                           0x0001CD06, # BLOCK OCTANT-34
-                           0x0001CD07, # BLOCK OCTANT-134
-                           0x0001CD08, # BLOCK OCTANT-234
-                           0x00002580, # UPPER HALF BLOCK
-                           0x0001CD09, # BLOCK OCTANT-5
-                           0x0001CD0A, # BLOCK OCTANT-15
-                           0x0001CD0B, # BLOCK OCTANT-25
-                           0x0001CD0C, # BLOCK OCTANT-125
-                           0x0001FBE6, # MIDDLE LEFT ONE QUARTER BLOCK
-                           0x0001CD0D, # BLOCK OCTANT-135
-                           0x0001CD0E, # BLOCK OCTANT-235
-                           0x0001CD0F, # BLOCK OCTANT-1235
-                           0x0001CD10, # BLOCK OCTANT-45
-                           0x0001CD11, # BLOCK OCTANT-145
-                           0x0001CD12, # BLOCK OCTANT-245
-                           0x0001CD13, # BLOCK OCTANT-1245
-                           0x0001CD14, # BLOCK OCTANT-345
-                           0x0001CD15, # BLOCK OCTANT-1345
-                           0x0001CD16, # BLOCK OCTANT-2345
-                           0x0001CD17, # BLOCK OCTANT-12345
-                           0x0001CD18, # BLOCK OCTANT-6
-                           0x0001CD19, # BLOCK OCTANT-16
-                           0x0001CD1A, # BLOCK OCTANT-26
-                           0x0001CD1B, # BLOCK OCTANT-126
-                           0x0001CD1C, # BLOCK OCTANT-36
-                           0x0001CD1D, # BLOCK OCTANT-136
-                           0x0001CD1E, # BLOCK OCTANT-236
-                           0x0001CD1F, # BLOCK OCTANT-1236
-                           0x0001FBE7, # MIDDLE RIGHT ONE QUARTER BLOCK
-                           0x0001CD20, # BLOCK OCTANT-146
-                           0x0001CD21, # BLOCK OCTANT-246
-                           0x0001CD22, # BLOCK OCTANT-1246
-                           0x0001CD23, # BLOCK OCTANT-346
-                           0x0001CD24, # BLOCK OCTANT-1346
-                           0x0001CD25, # BLOCK OCTANT-2346
-                           0x0001CD26, # BLOCK OCTANT-12346
-                           0x0001CD27, # BLOCK OCTANT-56
-                           0x0001CD28, # BLOCK OCTANT-156
-                           0x0001CD29, # BLOCK OCTANT-256
-                           0x0001CD2A, # BLOCK OCTANT-1256
-                           0x0001CD2B, # BLOCK OCTANT-356
-                           0x0001CD2C, # BLOCK OCTANT-1356
-                           0x0001CD2D, # BLOCK OCTANT-2356
-                           0x0001CD2E, # BLOCK OCTANT-12356
-                           0x0001CD2F, # BLOCK OCTANT-456
-                           0x0001CD30, # BLOCK OCTANT-1456
-                           0x0001CD31, # BLOCK OCTANT-2456
-                           0x0001CD32, # BLOCK OCTANT-12456
-                           0x0001CD33, # BLOCK OCTANT-3456
-                           0x0001CD34, # BLOCK OCTANT-13456
-                           0x0001CD35, # BLOCK OCTANT-23456
-                           0x0001FB85, # UPPER THREE QUARTERS BLOCK
-                           0x0001CEA3, # LEFT HALF LOWER ONE QUARTER BLOCK
-                           0x0001CD36, # BLOCK OCTANT-17
-                           0x0001CD37, # BLOCK OCTANT-27
-                           0x0001CD38, # BLOCK OCTANT-127
-                           0x0001CD39, # BLOCK OCTANT-37
-                           0x0001CD3A, # BLOCK OCTANT-137
-                           0x0001CD3B, # BLOCK OCTANT-237
-                           0x0001CD3C, # BLOCK OCTANT-1237
-                           0x0001CD3D, # BLOCK OCTANT-47
-                           0x0001CD3E, # BLOCK OCTANT-147
-                           0x0001CD3F, # BLOCK OCTANT-247
-                           0x0001CD40, # BLOCK OCTANT-1247
-                           0x0001CD41, # BLOCK OCTANT-347
-                           0x0001CD42, # BLOCK OCTANT-1347
-                           0x0001CD43, # BLOCK OCTANT-2347
-                           0x0001CD44, # BLOCK OCTANT-12347
-                           0x00002596, # QUADRANT LOWER LEFT
-                           0x0001CD45, # BLOCK OCTANT-157
-                           0x0001CD46, # BLOCK OCTANT-257
-                           0x0001CD47, # BLOCK OCTANT-1257
-                           0x0001CD48, # BLOCK OCTANT-357
-                           0x0000258C, # LEFT HALF BLOCK
-                           0x0001CD49, # BLOCK OCTANT-2357
-                           0x0001CD4A, # BLOCK OCTANT-12357
-                           0x0001CD4B, # BLOCK OCTANT-457
-                           0x0001CD4C, # BLOCK OCTANT-1457
-                           0x0000259E, # QUADRANT UPPER RIGHT AND LOWER LEFT
-                           0x0001CD4D, # BLOCK OCTANT-12457
-                           0x0001CD4E, # BLOCK OCTANT-3457
-                           0x0001CD4F, # BLOCK OCTANT-13457
-                           0x0001CD50, # BLOCK OCTANT-23457
-                           0x0000259B, # QUADRANT UPPER LEFT AND UPPER RIGHT AND LOWER LEFT
-                           0x0001CD51, # BLOCK OCTANT-67
-                           0x0001CD52, # BLOCK OCTANT-167
-                           0x0001CD53, # BLOCK OCTANT-267
-                           0x0001CD54, # BLOCK OCTANT-1267
-                           0x0001CD55, # BLOCK OCTANT-367
-                           0x0001CD56, # BLOCK OCTANT-1367
-                           0x0001CD57, # BLOCK OCTANT-2367
-                           0x0001CD58, # BLOCK OCTANT-12367
-                           0x0001CD59, # BLOCK OCTANT-467
-                           0x0001CD5A, # BLOCK OCTANT-1467
-                           0x0001CD5B, # BLOCK OCTANT-2467
-                           0x0001CD5C, # BLOCK OCTANT-12467
-                           0x0001CD5D, # BLOCK OCTANT-3467
-                           0x0001CD5E, # BLOCK OCTANT-13467
-                           0x0001CD5F, # BLOCK OCTANT-23467
-                           0x0001CD60, # BLOCK OCTANT-123467
-                           0x0001CD61, # BLOCK OCTANT-567
-                           0x0001CD62, # BLOCK OCTANT-1567
-                           0x0001CD63, # BLOCK OCTANT-2567
-                           0x0001CD64, # BLOCK OCTANT-12567
-                           0x0001CD65, # BLOCK OCTANT-3567
-                           0x0001CD66, # BLOCK OCTANT-13567
-                           0x0001CD67, # BLOCK OCTANT-23567
-                           0x0001CD68, # BLOCK OCTANT-123567
-                           0x0001CD69, # BLOCK OCTANT-4567
-                           0x0001CD6A, # BLOCK OCTANT-14567
-                           0x0001CD6B, # BLOCK OCTANT-24567
-                           0x0001CD6C, # BLOCK OCTANT-124567
-                           0x0001CD6D, # BLOCK OCTANT-34567
-                           0x0001CD6E, # BLOCK OCTANT-134567
-                           0x0001CD6F, # BLOCK OCTANT-234567
-                           0x0001CD70, # BLOCK OCTANT-1234567
-                           0x0001CEA0, # RIGHT HALF LOWER ONE QUARTER BLOCK
-                           0x0001CD71, # BLOCK OCTANT-18
-                           0x0001CD72, # BLOCK OCTANT-28
-                           0x0001CD73, # BLOCK OCTANT-128
-                           0x0001CD74, # BLOCK OCTANT-38
-                           0x0001CD75, # BLOCK OCTANT-138
-                           0x0001CD76, # BLOCK OCTANT-238
-                           0x0001CD77, # BLOCK OCTANT-1238
-                           0x0001CD78, # BLOCK OCTANT-48
-                           0x0001CD79, # BLOCK OCTANT-148
-                           0x0001CD7A, # BLOCK OCTANT-248
-                           0x0001CD7B, # BLOCK OCTANT-1248
-                           0x0001CD7C, # BLOCK OCTANT-348
-                           0x0001CD7D, # BLOCK OCTANT-1348
-                           0x0001CD7E, # BLOCK OCTANT-2348
-                           0x0001CD7F, # BLOCK OCTANT-12348
-                           0x0001CD80, # BLOCK OCTANT-58
-                           0x0001CD81, # BLOCK OCTANT-158
-                           0x0001CD82, # BLOCK OCTANT-258
-                           0x0001CD83, # BLOCK OCTANT-1258
-                           0x0001CD84, # BLOCK OCTANT-358
-                           0x0001CD85, # BLOCK OCTANT-1358
-                           0x0001CD86, # BLOCK OCTANT-2358
-                           0x0001CD87, # BLOCK OCTANT-12358
-                           0x0001CD88, # BLOCK OCTANT-458
-                           0x0001CD89, # BLOCK OCTANT-1458
-                           0x0001CD8A, # BLOCK OCTANT-2458
-                           0x0001CD8B, # BLOCK OCTANT-12458
-                           0x0001CD8C, # BLOCK OCTANT-3458
-                           0x0001CD8D, # BLOCK OCTANT-13458
-                           0x0001CD8E, # BLOCK OCTANT-23458
-                           0x0001CD8F, # BLOCK OCTANT-123458
-                           0x00002597, # QUADRANT LOWER RIGHT
-                           0x0001CD90, # BLOCK OCTANT-168
-                           0x0001CD91, # BLOCK OCTANT-268
-                           0x0001CD92, # BLOCK OCTANT-1268
-                           0x0001CD93, # BLOCK OCTANT-368
-                           0x0000259A, # QUADRANT UPPER LEFT AND LOWER RIGHT
-                           0x0001CD94, # BLOCK OCTANT-2368
-                           0x0001CD95, # BLOCK OCTANT-12368
-                           0x0001CD96, # BLOCK OCTANT-468
-                           0x0001CD97, # BLOCK OCTANT-1468
-                           0x00002590, # RIGHT HALF BLOCK
-                           0x0001CD98, # BLOCK OCTANT-12468
-                           0x0001CD99, # BLOCK OCTANT-3468
-                           0x0001CD9A, # BLOCK OCTANT-13468
-                           0x0001CD9B, # BLOCK OCTANT-23468
-                           0x0000259C, # QUADRANT UPPER LEFT AND UPPER RIGHT AND LOWER RIGHT
-                           0x0001CD9C, # BLOCK OCTANT-568
-                           0x0001CD9D, # BLOCK OCTANT-1568
-                           0x0001CD9E, # BLOCK OCTANT-2568
-                           0x0001CD9F, # BLOCK OCTANT-12568
-                           0x0001CDA0, # BLOCK OCTANT-3568
-                           0x0001CDA1, # BLOCK OCTANT-13568
-                           0x0001CDA2, # BLOCK OCTANT-23568
-                           0x0001CDA3, # BLOCK OCTANT-123568
-                           0x0001CDA4, # BLOCK OCTANT-4568
-                           0x0001CDA5, # BLOCK OCTANT-14568
-                           0x0001CDA6, # BLOCK OCTANT-24568
-                           0x0001CDA7, # BLOCK OCTANT-124568
-                           0x0001CDA8, # BLOCK OCTANT-34568
-                           0x0001CDA9, # BLOCK OCTANT-134568
-                           0x0001CDAA, # BLOCK OCTANT-234568
-                           0x0001CDAB, # BLOCK OCTANT-1234568
-                           0x00002582, # LOWER ONE QUARTER BLOCK
-                           0x0001CDAC, # BLOCK OCTANT-178
-                           0x0001CDAD, # BLOCK OCTANT-278
-                           0x0001CDAE, # BLOCK OCTANT-1278
-                           0x0001CDAF, # BLOCK OCTANT-378
-                           0x0001CDB0, # BLOCK OCTANT-1378
-                           0x0001CDB1, # BLOCK OCTANT-2378
-                           0x0001CDB2, # BLOCK OCTANT-12378
-                           0x0001CDB3, # BLOCK OCTANT-478
-                           0x0001CDB4, # BLOCK OCTANT-1478
-                           0x0001CDB5, # BLOCK OCTANT-2478
-                           0x0001CDB6, # BLOCK OCTANT-12478
-                           0x0001CDB7, # BLOCK OCTANT-3478
-                           0x0001CDB8, # BLOCK OCTANT-13478
-                           0x0001CDB9, # BLOCK OCTANT-23478
-                           0x0001CDBA, # BLOCK OCTANT-123478
-                           0x0001CDBB, # BLOCK OCTANT-578
-                           0x0001CDBC, # BLOCK OCTANT-1578
-                           0x0001CDBD, # BLOCK OCTANT-2578
-                           0x0001CDBE, # BLOCK OCTANT-12578
-                           0x0001CDBF, # BLOCK OCTANT-3578
-                           0x0001CDC0, # BLOCK OCTANT-13578
-                           0x0001CDC1, # BLOCK OCTANT-23578
-                           0x0001CDC2, # BLOCK OCTANT-123578
-                           0x0001CDC3, # BLOCK OCTANT-4578
-                           0x0001CDC4, # BLOCK OCTANT-14578
-                           0x0001CDC5, # BLOCK OCTANT-24578
-                           0x0001CDC6, # BLOCK OCTANT-124578
-                           0x0001CDC7, # BLOCK OCTANT-34578
-                           0x0001CDC8, # BLOCK OCTANT-134578
-                           0x0001CDC9, # BLOCK OCTANT-234578
-                           0x0001CDCA, # BLOCK OCTANT-1234578
-                           0x0001CDCB, # BLOCK OCTANT-678
-                           0x0001CDCC, # BLOCK OCTANT-1678
-                           0x0001CDCD, # BLOCK OCTANT-2678
-                           0x0001CDCE, # BLOCK OCTANT-12678
-                           0x0001CDCF, # BLOCK OCTANT-3678
-                           0x0001CDD0, # BLOCK OCTANT-13678
-                           0x0001CDD1, # BLOCK OCTANT-23678
-                           0x0001CDD2, # BLOCK OCTANT-123678
-                           0x0001CDD3, # BLOCK OCTANT-4678
-                           0x0001CDD4, # BLOCK OCTANT-14678
-                           0x0001CDD5, # BLOCK OCTANT-24678
-                           0x0001CDD6, # BLOCK OCTANT-124678
-                           0x0001CDD7, # BLOCK OCTANT-34678
-                           0x0001CDD8, # BLOCK OCTANT-134678
-                           0x0001CDD9, # BLOCK OCTANT-234678
-                           0x0001CDDA, # BLOCK OCTANT-1234678
-                           0x00002584, # LOWER HALF BLOCK
-                           0x0001CDDB, # BLOCK OCTANT-15678
-                           0x0001CDDC, # BLOCK OCTANT-25678
-                           0x0001CDDD, # BLOCK OCTANT-125678
-                           0x0001CDDE, # BLOCK OCTANT-35678
-                           0x00002599, # QUADRANT UPPER LEFT AND LOWER LEFT AND LOWER RIGHT
-                           0x0001CDDF, # BLOCK OCTANT-235678
-                           0x0001CDE0, # BLOCK OCTANT-1235678
-                           0x0001CDE1, # BLOCK OCTANT-45678
-                           0x0001CDE2, # BLOCK OCTANT-145678
-                           0x0000259F, # QUADRANT UPPER RIGHT AND LOWER LEFT AND LOWER RIGHT
-                           0x0001CDE3, # BLOCK OCTANT-1245678
-                           0x00002586, # LOWER THREE QUARTERS BLOCK
-                           0x0001CDE4, # BLOCK OCTANT-1345678
-                           0x0001CDE5, # BLOCK OCTANT-2345678
-                           0x00002588] # FULL BLOCK
+const OCTANT_DECODE = Char[
+    0x000000A0, # NO-BREAK SPACE
+    0x0001CEA8, # LEFT HALF UPPER ONE QUARTER BLOCK
+    0x0001CEAB, # RIGHT HALF UPPER ONE QUARTER BLOCK
+    0x0001FB82, # UPPER ONE QUARTER BLOCK
+    0x0001CD00, # BLOCK OCTANT-3
+    0x00002598, # QUADRANT UPPER LEFT
+    0x0001CD01, # BLOCK OCTANT-23
+    0x0001CD02, # BLOCK OCTANT-123
+    0x0001CD03, # BLOCK OCTANT-4
+    0x0001CD04, # BLOCK OCTANT-14
+    0x0000259D, # QUADRANT UPPER RIGHT
+    0x0001CD05, # BLOCK OCTANT-124
+    0x0001CD06, # BLOCK OCTANT-34
+    0x0001CD07, # BLOCK OCTANT-134
+    0x0001CD08, # BLOCK OCTANT-234
+    0x00002580, # UPPER HALF BLOCK
+    0x0001CD09, # BLOCK OCTANT-5
+    0x0001CD0A, # BLOCK OCTANT-15
+    0x0001CD0B, # BLOCK OCTANT-25
+    0x0001CD0C, # BLOCK OCTANT-125
+    0x0001FBE6, # MIDDLE LEFT ONE QUARTER BLOCK
+    0x0001CD0D, # BLOCK OCTANT-135
+    0x0001CD0E, # BLOCK OCTANT-235
+    0x0001CD0F, # BLOCK OCTANT-1235
+    0x0001CD10, # BLOCK OCTANT-45
+    0x0001CD11, # BLOCK OCTANT-145
+    0x0001CD12, # BLOCK OCTANT-245
+    0x0001CD13, # BLOCK OCTANT-1245
+    0x0001CD14, # BLOCK OCTANT-345
+    0x0001CD15, # BLOCK OCTANT-1345
+    0x0001CD16, # BLOCK OCTANT-2345
+    0x0001CD17, # BLOCK OCTANT-12345
+    0x0001CD18, # BLOCK OCTANT-6
+    0x0001CD19, # BLOCK OCTANT-16
+    0x0001CD1A, # BLOCK OCTANT-26
+    0x0001CD1B, # BLOCK OCTANT-126
+    0x0001CD1C, # BLOCK OCTANT-36
+    0x0001CD1D, # BLOCK OCTANT-136
+    0x0001CD1E, # BLOCK OCTANT-236
+    0x0001CD1F, # BLOCK OCTANT-1236
+    0x0001FBE7, # MIDDLE RIGHT ONE QUARTER BLOCK
+    0x0001CD20, # BLOCK OCTANT-146
+    0x0001CD21, # BLOCK OCTANT-246
+    0x0001CD22, # BLOCK OCTANT-1246
+    0x0001CD23, # BLOCK OCTANT-346
+    0x0001CD24, # BLOCK OCTANT-1346
+    0x0001CD25, # BLOCK OCTANT-2346
+    0x0001CD26, # BLOCK OCTANT-12346
+    0x0001CD27, # BLOCK OCTANT-56
+    0x0001CD28, # BLOCK OCTANT-156
+    0x0001CD29, # BLOCK OCTANT-256
+    0x0001CD2A, # BLOCK OCTANT-1256
+    0x0001CD2B, # BLOCK OCTANT-356
+    0x0001CD2C, # BLOCK OCTANT-1356
+    0x0001CD2D, # BLOCK OCTANT-2356
+    0x0001CD2E, # BLOCK OCTANT-12356
+    0x0001CD2F, # BLOCK OCTANT-456
+    0x0001CD30, # BLOCK OCTANT-1456
+    0x0001CD31, # BLOCK OCTANT-2456
+    0x0001CD32, # BLOCK OCTANT-12456
+    0x0001CD33, # BLOCK OCTANT-3456
+    0x0001CD34, # BLOCK OCTANT-13456
+    0x0001CD35, # BLOCK OCTANT-23456
+    0x0001FB85, # UPPER THREE QUARTERS BLOCK
+    0x0001CEA3, # LEFT HALF LOWER ONE QUARTER BLOCK
+    0x0001CD36, # BLOCK OCTANT-17
+    0x0001CD37, # BLOCK OCTANT-27
+    0x0001CD38, # BLOCK OCTANT-127
+    0x0001CD39, # BLOCK OCTANT-37
+    0x0001CD3A, # BLOCK OCTANT-137
+    0x0001CD3B, # BLOCK OCTANT-237
+    0x0001CD3C, # BLOCK OCTANT-1237
+    0x0001CD3D, # BLOCK OCTANT-47
+    0x0001CD3E, # BLOCK OCTANT-147
+    0x0001CD3F, # BLOCK OCTANT-247
+    0x0001CD40, # BLOCK OCTANT-1247
+    0x0001CD41, # BLOCK OCTANT-347
+    0x0001CD42, # BLOCK OCTANT-1347
+    0x0001CD43, # BLOCK OCTANT-2347
+    0x0001CD44, # BLOCK OCTANT-12347
+    0x00002596, # QUADRANT LOWER LEFT
+    0x0001CD45, # BLOCK OCTANT-157
+    0x0001CD46, # BLOCK OCTANT-257
+    0x0001CD47, # BLOCK OCTANT-1257
+    0x0001CD48, # BLOCK OCTANT-357
+    0x0000258C, # LEFT HALF BLOCK
+    0x0001CD49, # BLOCK OCTANT-2357
+    0x0001CD4A, # BLOCK OCTANT-12357
+    0x0001CD4B, # BLOCK OCTANT-457
+    0x0001CD4C, # BLOCK OCTANT-1457
+    0x0000259E, # QUADRANT UPPER RIGHT AND LOWER LEFT
+    0x0001CD4D, # BLOCK OCTANT-12457
+    0x0001CD4E, # BLOCK OCTANT-3457
+    0x0001CD4F, # BLOCK OCTANT-13457
+    0x0001CD50, # BLOCK OCTANT-23457
+    0x0000259B, # QUADRANT UPPER LEFT AND UPPER RIGHT AND LOWER LEFT
+    0x0001CD51, # BLOCK OCTANT-67
+    0x0001CD52, # BLOCK OCTANT-167
+    0x0001CD53, # BLOCK OCTANT-267
+    0x0001CD54, # BLOCK OCTANT-1267
+    0x0001CD55, # BLOCK OCTANT-367
+    0x0001CD56, # BLOCK OCTANT-1367
+    0x0001CD57, # BLOCK OCTANT-2367
+    0x0001CD58, # BLOCK OCTANT-12367
+    0x0001CD59, # BLOCK OCTANT-467
+    0x0001CD5A, # BLOCK OCTANT-1467
+    0x0001CD5B, # BLOCK OCTANT-2467
+    0x0001CD5C, # BLOCK OCTANT-12467
+    0x0001CD5D, # BLOCK OCTANT-3467
+    0x0001CD5E, # BLOCK OCTANT-13467
+    0x0001CD5F, # BLOCK OCTANT-23467
+    0x0001CD60, # BLOCK OCTANT-123467
+    0x0001CD61, # BLOCK OCTANT-567
+    0x0001CD62, # BLOCK OCTANT-1567
+    0x0001CD63, # BLOCK OCTANT-2567
+    0x0001CD64, # BLOCK OCTANT-12567
+    0x0001CD65, # BLOCK OCTANT-3567
+    0x0001CD66, # BLOCK OCTANT-13567
+    0x0001CD67, # BLOCK OCTANT-23567
+    0x0001CD68, # BLOCK OCTANT-123567
+    0x0001CD69, # BLOCK OCTANT-4567
+    0x0001CD6A, # BLOCK OCTANT-14567
+    0x0001CD6B, # BLOCK OCTANT-24567
+    0x0001CD6C, # BLOCK OCTANT-124567
+    0x0001CD6D, # BLOCK OCTANT-34567
+    0x0001CD6E, # BLOCK OCTANT-134567
+    0x0001CD6F, # BLOCK OCTANT-234567
+    0x0001CD70, # BLOCK OCTANT-1234567
+    0x0001CEA0, # RIGHT HALF LOWER ONE QUARTER BLOCK
+    0x0001CD71, # BLOCK OCTANT-18
+    0x0001CD72, # BLOCK OCTANT-28
+    0x0001CD73, # BLOCK OCTANT-128
+    0x0001CD74, # BLOCK OCTANT-38
+    0x0001CD75, # BLOCK OCTANT-138
+    0x0001CD76, # BLOCK OCTANT-238
+    0x0001CD77, # BLOCK OCTANT-1238
+    0x0001CD78, # BLOCK OCTANT-48
+    0x0001CD79, # BLOCK OCTANT-148
+    0x0001CD7A, # BLOCK OCTANT-248
+    0x0001CD7B, # BLOCK OCTANT-1248
+    0x0001CD7C, # BLOCK OCTANT-348
+    0x0001CD7D, # BLOCK OCTANT-1348
+    0x0001CD7E, # BLOCK OCTANT-2348
+    0x0001CD7F, # BLOCK OCTANT-12348
+    0x0001CD80, # BLOCK OCTANT-58
+    0x0001CD81, # BLOCK OCTANT-158
+    0x0001CD82, # BLOCK OCTANT-258
+    0x0001CD83, # BLOCK OCTANT-1258
+    0x0001CD84, # BLOCK OCTANT-358
+    0x0001CD85, # BLOCK OCTANT-1358
+    0x0001CD86, # BLOCK OCTANT-2358
+    0x0001CD87, # BLOCK OCTANT-12358
+    0x0001CD88, # BLOCK OCTANT-458
+    0x0001CD89, # BLOCK OCTANT-1458
+    0x0001CD8A, # BLOCK OCTANT-2458
+    0x0001CD8B, # BLOCK OCTANT-12458
+    0x0001CD8C, # BLOCK OCTANT-3458
+    0x0001CD8D, # BLOCK OCTANT-13458
+    0x0001CD8E, # BLOCK OCTANT-23458
+    0x0001CD8F, # BLOCK OCTANT-123458
+    0x00002597, # QUADRANT LOWER RIGHT
+    0x0001CD90, # BLOCK OCTANT-168
+    0x0001CD91, # BLOCK OCTANT-268
+    0x0001CD92, # BLOCK OCTANT-1268
+    0x0001CD93, # BLOCK OCTANT-368
+    0x0000259A, # QUADRANT UPPER LEFT AND LOWER RIGHT
+    0x0001CD94, # BLOCK OCTANT-2368
+    0x0001CD95, # BLOCK OCTANT-12368
+    0x0001CD96, # BLOCK OCTANT-468
+    0x0001CD97, # BLOCK OCTANT-1468
+    0x00002590, # RIGHT HALF BLOCK
+    0x0001CD98, # BLOCK OCTANT-12468
+    0x0001CD99, # BLOCK OCTANT-3468
+    0x0001CD9A, # BLOCK OCTANT-13468
+    0x0001CD9B, # BLOCK OCTANT-23468
+    0x0000259C, # QUADRANT UPPER LEFT AND UPPER RIGHT AND LOWER RIGHT
+    0x0001CD9C, # BLOCK OCTANT-568
+    0x0001CD9D, # BLOCK OCTANT-1568
+    0x0001CD9E, # BLOCK OCTANT-2568
+    0x0001CD9F, # BLOCK OCTANT-12568
+    0x0001CDA0, # BLOCK OCTANT-3568
+    0x0001CDA1, # BLOCK OCTANT-13568
+    0x0001CDA2, # BLOCK OCTANT-23568
+    0x0001CDA3, # BLOCK OCTANT-123568
+    0x0001CDA4, # BLOCK OCTANT-4568
+    0x0001CDA5, # BLOCK OCTANT-14568
+    0x0001CDA6, # BLOCK OCTANT-24568
+    0x0001CDA7, # BLOCK OCTANT-124568
+    0x0001CDA8, # BLOCK OCTANT-34568
+    0x0001CDA9, # BLOCK OCTANT-134568
+    0x0001CDAA, # BLOCK OCTANT-234568
+    0x0001CDAB, # BLOCK OCTANT-1234568
+    0x00002582, # LOWER ONE QUARTER BLOCK
+    0x0001CDAC, # BLOCK OCTANT-178
+    0x0001CDAD, # BLOCK OCTANT-278
+    0x0001CDAE, # BLOCK OCTANT-1278
+    0x0001CDAF, # BLOCK OCTANT-378
+    0x0001CDB0, # BLOCK OCTANT-1378
+    0x0001CDB1, # BLOCK OCTANT-2378
+    0x0001CDB2, # BLOCK OCTANT-12378
+    0x0001CDB3, # BLOCK OCTANT-478
+    0x0001CDB4, # BLOCK OCTANT-1478
+    0x0001CDB5, # BLOCK OCTANT-2478
+    0x0001CDB6, # BLOCK OCTANT-12478
+    0x0001CDB7, # BLOCK OCTANT-3478
+    0x0001CDB8, # BLOCK OCTANT-13478
+    0x0001CDB9, # BLOCK OCTANT-23478
+    0x0001CDBA, # BLOCK OCTANT-123478
+    0x0001CDBB, # BLOCK OCTANT-578
+    0x0001CDBC, # BLOCK OCTANT-1578
+    0x0001CDBD, # BLOCK OCTANT-2578
+    0x0001CDBE, # BLOCK OCTANT-12578
+    0x0001CDBF, # BLOCK OCTANT-3578
+    0x0001CDC0, # BLOCK OCTANT-13578
+    0x0001CDC1, # BLOCK OCTANT-23578
+    0x0001CDC2, # BLOCK OCTANT-123578
+    0x0001CDC3, # BLOCK OCTANT-4578
+    0x0001CDC4, # BLOCK OCTANT-14578
+    0x0001CDC5, # BLOCK OCTANT-24578
+    0x0001CDC6, # BLOCK OCTANT-124578
+    0x0001CDC7, # BLOCK OCTANT-34578
+    0x0001CDC8, # BLOCK OCTANT-134578
+    0x0001CDC9, # BLOCK OCTANT-234578
+    0x0001CDCA, # BLOCK OCTANT-1234578
+    0x0001CDCB, # BLOCK OCTANT-678
+    0x0001CDCC, # BLOCK OCTANT-1678
+    0x0001CDCD, # BLOCK OCTANT-2678
+    0x0001CDCE, # BLOCK OCTANT-12678
+    0x0001CDCF, # BLOCK OCTANT-3678
+    0x0001CDD0, # BLOCK OCTANT-13678
+    0x0001CDD1, # BLOCK OCTANT-23678
+    0x0001CDD2, # BLOCK OCTANT-123678
+    0x0001CDD3, # BLOCK OCTANT-4678
+    0x0001CDD4, # BLOCK OCTANT-14678
+    0x0001CDD5, # BLOCK OCTANT-24678
+    0x0001CDD6, # BLOCK OCTANT-124678
+    0x0001CDD7, # BLOCK OCTANT-34678
+    0x0001CDD8, # BLOCK OCTANT-134678
+    0x0001CDD9, # BLOCK OCTANT-234678
+    0x0001CDDA, # BLOCK OCTANT-1234678
+    0x00002584, # LOWER HALF BLOCK
+    0x0001CDDB, # BLOCK OCTANT-15678
+    0x0001CDDC, # BLOCK OCTANT-25678
+    0x0001CDDD, # BLOCK OCTANT-125678
+    0x0001CDDE, # BLOCK OCTANT-35678
+    0x00002599, # QUADRANT UPPER LEFT AND LOWER LEFT AND LOWER RIGHT
+    0x0001CDDF, # BLOCK OCTANT-235678
+    0x0001CDE0, # BLOCK OCTANT-1235678
+    0x0001CDE1, # BLOCK OCTANT-45678
+    0x0001CDE2, # BLOCK OCTANT-145678
+    0x0000259F, # QUADRANT UPPER RIGHT AND LOWER LEFT AND LOWER RIGHT
+    0x0001CDE3, # BLOCK OCTANT-1245678
+    0x00002586, # LOWER THREE QUARTERS BLOCK
+    0x0001CDE4, # BLOCK OCTANT-1345678
+    0x0001CDE5, # BLOCK OCTANT-2345678
+    0x00002588, # FULL BLOCK
+]
 
 @inline x_pixel_per_char(::Type{<:OctantCanvas}) = 2
 @inline y_pixel_per_char(::Type{<:OctantCanvas}) = 4

From 88d6a8e49f1c05d3e97138fa62f4485f4e89db9d Mon Sep 17 00:00:00 2001
From: t-bltg <tf.bltg@gmail.com>
Date: Fri, 11 Jul 2025 23:00:13 +0200
Subject: [PATCH 3/4] remove obsolete declaration

---
 src/canvas/octantcanvas.jl | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/canvas/octantcanvas.jl b/src/canvas/octantcanvas.jl
index 804bf668..279f256c 100644
--- a/src/canvas/octantcanvas.jl
+++ b/src/canvas/octantcanvas.jl
@@ -30,7 +30,6 @@ const OCTANT_SIGNS = [
 ]
 
 const N_OCTANT = grid_type(OctantCanvas)(256)
-const OCTANT_DECODE = Vector{Char}(undef, typemax(N_OCTANT))
 
 # The array is stored according to the octant bit pattern:
 #     0 1

From 4ccaa2dfc3296fc6a231e9b800647e0b0f01c288 Mon Sep 17 00:00:00 2001
From: t-bltg <tf.bltg@gmail.com>
Date: Fri, 11 Jul 2025 23:02:45 +0200
Subject: [PATCH 4/4] clarify docs

---
 docs/src/dev.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/src/dev.md b/docs/src/dev.md
index e795b756..7519200b 100644
--- a/docs/src/dev.md
+++ b/docs/src/dev.md
@@ -36,13 +36,13 @@ The following types of `Canvas` are implemented:
   This type of canvas is probably one of the two with the highest resolution for `Unicode` plotting. It essentially uses the Unicode characters of the [Braille](https://en.wikipedia.org/wiki/Braille) symbols as pixels. This effectively turns every character into eight pixels that can individually be manipulated using binary operations.
 
 - **OctantCanvas**:
-  This type of canvas is the other with the highest resolution for `Unicode` plotting. It essentially uses the Unicode characters of the [octant](https://unicode.org/charts/PDF/Unicode-16.0/U160-1CC00.pdf) symbols as pixels. This effectively turns every character into eight pixels that can individually be manipulated using binary operations. (Unicode octants require support for Unicode 16 which was released in 2024. Some terminal emulators draw these characters directly, others use a font for rendering. If neither supports it then this canvas will not work.) If OctantCanvas is working then it should look better than BrailleCanvas.
+  This type of canvas is the other with the highest resolution for `Unicode` plotting. It essentially uses the Unicode characters of the [octant](https://unicode.org/charts/PDF/Unicode-16.0/U160-1CC00.pdf) symbols as pixels. This effectively turns every character into eight pixels that can individually be manipulated using binary operations. `Unicode` octants require support for Unicode 16 which was released in 2024. Some terminal emulators draw these characters directly, others use a font for rendering. If neither supports it then this canvas will not work. If `OctantCanvas` is working, then it should look similar to `BrailleCanvas`.
 
 - **BlockCanvas**:
-  This canvas is also `Unicode` based. It has half the resolution of the BrailleCanvas or OctantCanvas. In contrast to `BrailleCanvas`, the pixels don't have visible spacing between them. This canvas effectively turns every character into four pixels that can individually be manipulated using binary operations.
+  This canvas is also `Unicode` based. It has half the resolution of the `BrailleCanvas` or `OctantCanvas`. In contrast to `BrailleCanvas`, the pixels don't have visible spacing between them. This canvas effectively turns every character into four pixels that can individually be manipulated using binary operations.
 
 - **HeatmapCanvas**:
-  This canvas is also `Unicode` based. It has half the resolution of the `BlockCanvas`. This canvas effectively turns every character into two color pixels, using the foreground and background terminal colors. As such, the number of rows of the canvas is half the number of `y` coordinates being displayed.
+  This canvas is also `Unicode` based. It has half the resolution of the `BlockCanvas` or `OctantCanvas`. This canvas effectively turns every character into two color pixels, using the foreground and background terminal colors. As such, the number of rows of the canvas is half the number of `y` coordinates being displayed.
 
 - **AsciiCanvas** and **DotCanvas**:
   These two canvas utilizes only standard `ASCII` character for drawing. Naturally, it doesn't look quite as nice as the Unicode-based ones. However, in some situations it might yield better results. Printing plots to a file is one of those situations.