-
Notifications
You must be signed in to change notification settings - Fork 47
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Update documentation for colormaps (#515)
This adds visual examples for `sequential_palette`.
- Loading branch information
Showing
6 changed files
with
340 additions
and
106 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,183 @@ | ||
| module ColormapParams | ||
|
|
||
| using Colors | ||
| using Main.PNG16x16 | ||
|
|
||
| struct ColormapParamSVG <: Main.SVG | ||
| buf::IOBuffer | ||
| end | ||
|
|
||
| function ColormapParamSVG(target::Symbol) | ||
| io = IOBuffer() | ||
| write(io, | ||
| """ | ||
| <svg xmlns="http://www.w3.org/2000/svg" | ||
| xmlns:xlink="http://www.w3.org/1999/xlink" | ||
| version="1.1" | ||
| width="45mm" height="45mm" | ||
| viewBox="0 0 270 270" preserveAspectRatio="none" | ||
| shape-rendering="crispEdges" stroke="none" stroke-width="1"> | ||
| """) | ||
| write(io, | ||
| """ | ||
| <rect width="270" height="270" fill="#aaa" opacity="0.2" /> | ||
| """) | ||
| if target in (:c, :s, :b) | ||
| write_chart_csb(io, target) | ||
| elseif target in (:w, :d) | ||
| write_chart_wd(io, target) | ||
| end | ||
| write(io, "</svg>") | ||
| ColormapParamSVG(io) | ||
| end | ||
|
|
||
| function write_chart_csb(io, target::Symbol) | ||
| pp = (0.1, 0.5, 0.9) | ||
| pc = map(_ -> 0.88, pp) | ||
| ps = map(_ -> 0.60, pp) | ||
| pb = map(_ -> 0.75, pp) | ||
| markers = ("m -5,-5 v 10 h 10 v -10 z", | ||
| "m 0,-5 l -5,9 h 10 z", | ||
| "m 0,-4 l -4,4 4,4 4,-4 z") | ||
| if target === :c | ||
| col = Colors.JULIA_LOGO_COLORS.purple | ||
| label = "contrast" | ||
| pc = pp | ||
| elseif target === :s | ||
| col = Colors.JULIA_LOGO_COLORS.red | ||
| label = "saturation" | ||
| ps = pp | ||
| elseif target === :b | ||
| col = Colors.JULIA_LOGO_COLORS.green | ||
| label = "brightness" | ||
| pb = pp | ||
| end | ||
| h = round(Int, hue(convert(Luv, col))) | ||
| n = 16 | ||
| ls = (100/2/n):(100/n):100 | ||
| cs = (175/2/n):(175/n):175 | ||
| mc(l) = Colors.find_maximum_chroma(LCHuv(l, 0.0, h)) | ||
| plane = [LCHuv(100.0 - l, min(c, mc(l)), h) for l in ls, c in cs] | ||
| write(io, | ||
| """ | ||
| <g transform="translate(80, 20)" fill="none" stroke-width="1.5" | ||
| style="font-size: 18px; font-style: italic;"> | ||
| <image width="100" height="100" transform="scale(1.75, 2)" xlink:href=\"""") | ||
| write_png_as_data(io, plane) | ||
| write(io, "\" />\n") | ||
| mc_coords = join(string(round(Int, mc(100 - l)), ",", 2l, " ") for l = 0:2:100) | ||
| write(io, | ||
| """ | ||
| <path d="m 175,0 L $mc_coords 175,200 z" fill="#aaa" /> | ||
| <path d="m 0,200 v -215 l 5,10 m -10,0 l 5,-10" stroke="currentColor" /> | ||
| <path d="m 0,200 h 185 l -10,5 m 0,-10 l 10,5" stroke="currentColor" /> | ||
| <text fill="currentColor" x="150" y="220">C*</text> | ||
| <text fill="currentColor" x="-25" y="10" >L*</text> | ||
| """) | ||
| write(io, "</g>") | ||
| for i = 1:3 | ||
| colors= sequential_palette(h, 7, c=pc[i], s=ps[i], b=pb[i], w=0, d=0) | ||
| write_colormap(io, 25 * i - 20, pp[i], colors, markers[i]) | ||
| end | ||
| tcolors = (sequential_palette(h, 25, c=pc[i], s=ps[i], b=pb[i], w=0, d=0) for i = 1:3) | ||
| write_stroke(io, tcolors, markers) | ||
| write(io, | ||
| """ | ||
| <text fill="currentColor" y="260" style="font-size: 18px;"> | ||
| <tspan x="70" style="font-style: italic;">$target</tspan> | ||
| <tspan x="90">- $label [0,1]</tspan> | ||
| </text> | ||
| """) | ||
| end | ||
|
|
||
| function write_chart_wd(io, target::Symbol) | ||
| pp = 0.0:0.2:1.0 | ||
| pw = map(_ -> 0.15, pp) | ||
| pd = map(_ -> 0.0, pp) | ||
|
|
||
| if target === :w | ||
| col = Colors.JULIA_LOGO_COLORS.blue | ||
| cy = 40 | ||
| pw = pp | ||
| kcol = "#ff0" | ||
| elseif target === :d | ||
| col = Colors.JULIA_LOGO_COLORS.green | ||
| cy = 200 | ||
| pd = pp | ||
| kcol = "#00f" | ||
| end | ||
| h = round(Int, hue(convert(Luv, col))) | ||
| for i in eachindex(pp) | ||
| colors = sequential_palette(h, 9, w=pw[i], d=pd[i]) | ||
| write_colormap(io, 30 * i - 10, pp[i], colors) | ||
| end | ||
| write(io, | ||
| """ | ||
| <rect x="205" y="$cy" width="20" height="20" fill="$kcol" /> | ||
| """) | ||
| write(io, | ||
| """ | ||
| <text fill="currentColor" y="260" style="font-size: 18px;"> | ||
| <tspan x="20" style="font-style: italic;">$target</tspan> | ||
| <tspan x="40">- strength of $(target)color [0,1]</tspan> | ||
| <tspan x="195" y="$(cy-5)" style="font-style: italic;">$(target)color</tspan> | ||
| </text> | ||
| """) | ||
| end | ||
|
|
||
| function write_colormap(io, x, p, colors, marker="") | ||
| y = 0 | ||
| write(io, | ||
| """ | ||
| <g transform="translate($x, 40)" stroke-opacity="0.5"> | ||
| """) | ||
| for col in colors | ||
| write(io, | ||
| """ | ||
| <rect x="0" y="$y" width="20" height="20" fill="#$(hex(col))" /> | ||
| """) | ||
| y += 20 | ||
| end | ||
| if !isempty(marker) | ||
| y += 10 | ||
| write(io, | ||
| """ | ||
| <path d="m 10,$y $marker" fill="#$(hex(last(colors)))" stroke="white" /> | ||
| """) | ||
| end | ||
| y += 20 | ||
| write(io, | ||
| """ | ||
| <text x="0" y="$y" fill="currentColor" style="font-size: 15px;">$p</text> | ||
| """) | ||
| write(io, "</g>") | ||
| end | ||
|
|
||
| function write_stroke(io, tcolors, markers) | ||
| write(io, | ||
| """ | ||
| <g transform="translate(80, 20)" stroke="white" stroke-opacity="0.5"> | ||
| """) | ||
| coord(c) = string(round(Int, c.c), ",", round(Int, 2 * (100 - c.l)), " ") | ||
| for (i, colors) in enumerate(tcolors) | ||
| coords = join(map(coord, LCHuv.(colors))) | ||
| op = (0.4, 0.6, 1.0)[i] | ||
| sw = (10, 4, 1)[i] | ||
| write(io, | ||
| """ | ||
| <path d="M $coords" fill="none" stroke-opacity="$op" stroke-width="$sw" /> | ||
| """) | ||
| end | ||
| for (i, colors) in enumerate(tcolors) | ||
| mk = markers[i] | ||
| hx = hex(last(colors)) | ||
| write(io, | ||
| """ | ||
| <path d="M $(coord(LCHuv(first(colors))))$mk" fill="#$hx" /> | ||
| <path d="M $(coord(LCHuv(last( colors))))$mk" fill="#$hx" /> | ||
| """) | ||
| end | ||
| write(io, "</g>") | ||
| end | ||
|
|
||
| end # module |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| module PNG16x16 | ||
|
|
||
| using Colors | ||
| using Base64 | ||
|
|
||
| export write_png_as_data, write_png | ||
|
|
||
| function write_png_as_data(io::IO, cs::AbstractMatrix{<:Color}) | ||
| write(io, "data:image/png;base64,") | ||
| b64enc = Base64EncodePipe(io) | ||
| write_png(b64enc, cs) | ||
| close(b64enc) | ||
| end | ||
|
|
||
| function write_png(io::IO, cs::AbstractMatrix{<:Color}) | ||
| buf = IOBuffer() # to calculate chunk CRCs | ||
| n = 16 # 16 x 16 | ||
| u8(x) = write(buf, UInt8(x & 0xFF)) | ||
| u16(x) = (u8((x & 0xFFFF)>>8); u8(x)) | ||
| u32(x) = (u16((x & 0xFFFFFFFF)>>16); u16(x)) | ||
| b(bstr) = write(buf, bstr) | ||
| function palette(c::Color) | ||
| rgb24 = convert(RGB24,c) | ||
| u8(rgb24.color>>16); u8(rgb24.color>>8); u8(rgb24.color) | ||
| end | ||
| crct(x) = (for i = 1:8; x = x & 1==1 ? 0xEDB88320 ⊻ (x>>1) : x>>1 end; x) | ||
| table = UInt32[crct(i) for i = 0x00:0xFF] | ||
| function crc32() | ||
| seekstart(buf) | ||
| crc = 0xFFFFFFFF | ||
| while !eof(buf) | ||
| crc = (crc>>8) ⊻ table[(crc&0xFF) ⊻ read(buf, UInt8) + 1] | ||
| end | ||
| u32(crc ⊻ 0xFFFFFFFF) | ||
| end | ||
| flush() = write(io, take!(seekstart(buf))) | ||
|
|
||
| # The following is a pre-encoded 256-indexed-color PNG with size of 16x16. | ||
| # We only rewrite "pallets". | ||
| b(b"\x89PNG\x0D\x0A\x1A\x0A") | ||
| # Image header | ||
| u32(13); flush(); b(b"IHDR"); u32(n); u32(n); u8(8); u8(3); u8(0); u8(0); u8(0); crc32() | ||
| # Palette | ||
| u32(n * n * 3); flush(); | ||
| b(b"PLTE") | ||
| for y = 1:n, x = 1:n | ||
| palette(cs[y,x]) | ||
| end | ||
| crc32() | ||
| # Image data | ||
| u32(58); flush(); b(b"IDAT") | ||
| b(b"\x78\xDA\x63\x64\x60\x44\x03\x02\xE8\x02\x0A\xE8\x02\x06\xE8\x02") | ||
| b(b"\x0E\xE8\x02\x01\xE8\x02\x09\xE8\x02\x05\xE8\x02\x0D\xE8\x02\x13") | ||
| b(b"\xD0\x05\x16\xA0\x0B\x6C\x40\x17\x38\x80\x2E\x70\x01\x5D\xE0\x01") | ||
| b(b"\xBA\xC0\x07\x34\x3E\x00\x54\x4D\x08\x81"); crc32() | ||
| # Image trailer | ||
| u32(0); flush(); b(b"IEND"); crc32() | ||
| flush() | ||
| end | ||
|
|
||
| """ | ||
| # Image data | ||
| using CodecZlib | ||
| raw = IOBuffer() | ||
| for y = 0:15 | ||
| write(raw, UInt8(1)) # filter: SUB | ||
| write(raw, UInt8(y*16)) # line head | ||
| write(raw, UInt8[1 for i=1:15]) # left + 1 | ||
| end | ||
| flush(raw) | ||
| cd = ZlibCompressorStream(raw,level=9) | ||
| flush(cd) | ||
| seekstart(cd) | ||
| @show read(cd) # UInt8[0x78, 0xda, 0x63, 0x64, ... | ||
| """ | ||
|
|
||
| end # module |
Oops, something went wrong.