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Add support to display PNG for arbitrary types #76

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merged 2 commits into from
Oct 27, 2024
Merged

Add support to display PNG for arbitrary types #76

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126d2ce
Add support to display PNG for arbitrary types
jwortmann May 20, 2024
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jwortmann May 20, 2024
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12 changes: 11 additions & 1 deletion src/display.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,17 @@ struct TerminalGraphicDisplay{TC<:IO,TS<:IO} <: AbstractDisplay
end
TerminalGraphicDisplay(io::IO) = TerminalGraphicDisplay(io, io)

Base.displayable(::TerminalGraphicDisplay, ::MIME"image/png") = true
Base.displayable(::TerminalGraphicDisplay, ::MIME"image/png", x::Any) =
showable("image/png", x)
Base.displayable(::TerminalGraphicDisplay, ::MIME"image/png", ::Vector{UInt8}) = true
Base.displayable(::TerminalGraphicDisplay, ::MIME"image/png", ::AbstractArray{<:Colorant}) =
true

function Base.display(d::TerminalGraphicDisplay, ::MIME"image/png", x::Any)
io = IOBuffer()
show(io, "image/png", x)
display(d, MIME("image/png"), FileIO.load(io))
end

function Base.display(d::TerminalGraphicDisplay, ::MIME"image/png", bytes::Vector{UInt8})
# In this case, assume it to be png byte sequences, use FileIO to find a decoder for it.
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7 changes: 7 additions & 0 deletions test/tst_display.jl
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Expand Up @@ -15,4 +15,11 @@
dsp = ImageInTerminal.TerminalGraphicDisplay(io)
display(dsp, MIME("image/png"), bytes)
@test length(read(io, String)) > 5_000

struct Foo end
Base.show(io::IO, ::MIME"image/png", ::Foo) =
FileIO.save(Stream{format"PNG"}(io), FileIO.load(fn))
dsp = ImageInTerminal.TerminalGraphicDisplay(io)
display(dsp, MIME("image/png"), Foo())
@test length(read(io, String)) > 5_000
end
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