add native support for Gadfly plots

Author: nomadbl

Project.toml

@@ -20,13 +20,16 @@ StatsBase = "0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33, 0.34"
 julia = "1.6"
 
 [extras]
-Minio = "4281f0d9-7ae0-406e-9172-b7277c1efa20"
 ImageMagick = "6218d12a-5da1-5696-b52f-db25d2ecc6d1"
 LightGraphs = "093fc24a-ae57-5d10-9952-331d41423f4d"
 Logging = "56ddb016-857b-54e1-b83d-db4d58db5568"
 MLDatasets = "eb30cadb-4394-5ae3-aed4-317e484a6458"
+Minio = "4281f0d9-7ae0-406e-9172-b7277c1efa20"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 PyPlot = "d330b81b-6aea-500a-939a-2ce795aea3ee"
+Gadfly = "c91e804a-d5a3-530f-b6f0-dfbca275c004"
+Cairo="159f3aea-2a34-519c-b102-8c37f9878175"
+Fontconfig="186bb1d3-e1f7-5a2c-a377-96d770f13627"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 TestImages = "5e47fb64-e119-507b-a336-dd2b206d9990"
 Tracker = "9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c"

README.md

@@ -39,8 +39,8 @@ logger in Julia:
 
 You can log to TensorBoard any type. Numeric types will be logged as scalar,
 arrays will be binned into histograms, images and audio will be logged as such,
-and we even support [Plots](https://github.com/JuliaPlots/Plots.jl) and
-[PyPlot](https://github.com/JuliaPlots/Plots.jl) figures!
+and we even support [Plots](https://github.com/JuliaPlots/Plots.jl),
+[PyPlot](https://github.com/JuliaPlots/Plots.jl) and [Gadfly](https://github.com/GiovineItalia/Gadfly.jl) figures!
 
 For details about how types are logged by default, or how to customize this behaviour for your custom types,
 refer to the documentation or the examples folder.
@@ -71,7 +71,7 @@ end
 ```
 
 ## Integration with third party packages
-We also support native logging of the types defined by a few third-party packages, such as `Plots` and `PyPlot` plots.
+We also support native logging of the types defined by a few third-party packages, such as `Plots`, `PyPlot` and `Gadfly` plots.
 If there are other libraries that you think we should include in the list, please open an issue.
 
 ## Roadmap

docs/src/index.md

@@ -111,6 +111,7 @@ at [Reading back TensorBoard data](@ref)
 We also support logging custom types from a the following third-party libraries:
  - [Plots.jl](https://github.com/JuliaPlots/Plots.jl): the `Plots.Plot` type will be rendered to PNG at the resolution specified by the object and logged as an image
  - [PyPlot.jl](https://github.com/JuliaPy/PyPlot.jl): the `PyPlot.Figure` type will be rendered to PNG at the resolution specified by the object and logged as an image
+ - [Gadfly.jl](https://github.com/GiovineItalia/Gadfly.jl) type will be rendered to PNG at the resolution specified by the object and logged as an image. `Cairo` and `Fontconfig` packages must be imported for this functionality to work as it is required by `Gadfly`.
  - [Tracker.jl](https://github.com/FluxML/Tracker.jl): the `TrackedReal` and `TrackedArray` types will be logged as vector data
  - [ValueHistories.jl](https://github.com/JuliaML/ValueHistories.jl): the `MVHistory` type is used to store the deserialized content of .proto files.
 

examples/Gadfly.jl

@@ -0,0 +1,14 @@
+using TensorBoardLogger #import the TensorBoardLogger package
+using Logging #import Logging package
+using Gadfly, Cairo, Fontconfig
+
+logger = TBLogger("Gadflylogs", tb_append) #create tensorboard logger
+
+################log scalars example: y = x²################
+#using logger interface
+x = rand(100)
+y = rand(100)
+p = plot(x=x, y=y, Geom.point);
+with_logger(logger) do
+    @info "gadfly" plot=p
+end

src/Optional/Gadfly.jl

@@ -0,0 +1,15 @@
+import .Gadfly: Plot, render, draw
+function Base.convert(t::Type{PngImage}, plot::Gadfly.Plot)
+    pb = PipeBuffer();
+    show(pb, MIME("image/png"), render(plot));
+    # draw(Gadfly.PNG(pb), plot); # leaving here for now, does same thing
+    return PngImage(pb)
+end
+
+preprocess(name, plot::Gadfly.Plot, data) = preprocess(name, convert(PngImage, plot), data)
+preprocess(name, plots::AbstractArray{<:Gadfly.Plot}, data) = begin
+    for (i, plot)=enumerate(plots)
+        preprocess(name*"/$i", plot, data)
+    end
+    return data
+end

src/TensorBoardLogger.jl

@@ -102,6 +102,16 @@ function __init__()
     @require PyPlot="d330b81b-6aea-500a-939a-2ce795aea3ee" begin
         include("Optional/PyPlot.jl")
     end
+    @require Gadfly="c91e804a-d5a3-530f-b6f0-dfbca275c004" begin
+        @require Fontconfig="186bb1d3-e1f7-5a2c-a377-96d770f13627" begin
+            @require Cairo="159f3aea-2a34-519c-b102-8c37f9878175" begin
+                using .Cairo
+                using .Fontconfig
+                include("Optional/Gadfly.jl")        
+            end
+        end
+    end
+    # @require Gadfly="c91e804a-d5a3-530f-b6f0-dfbca275c004" include("Optional/Gadfly.jl")
     @require Tracker="9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c" begin
         include("Optional/Tracker.jl")
     end