make it backwards compatible

examples/gui/image_processing.jl

@@ -17,8 +17,15 @@ racoon = loadasset("racoon.png")
 img = convert(Matrix{RGBA{Float32}}, racoon)
 
 # create a slider that goes from 1-20 in 0.1 steps
-slider, slider_s = widget(Signal(1f0), range=1f0:0.1f0:20f0, window)
-
+slider, slider_s = widget(Signal(1f0), range = 1f0:0.1f0:20f0, window)
+
+if !isdefined(:clamp01)
+    function clamp01(color)
+        mapc(color) do c
+            clamp(c, 0, 1)
+        end
+    end
+end
 """
 Applies a gaussian filter to `img` and converts it to RGBA{N0f8}
 """

examples/imagelike/imageio.jl

@@ -22,13 +22,25 @@ arrays = map((RGBA{N0f8}, RGBA{Float32}, RGB{N0f8}, RGB{Float32}, BGRA{N0f8}, BG
 loaded_imgs = map(x->loadasset("test_images", x), readdir(assetpath("test_images")))
 
 # combine them all into one array and add an animated gif and a few other images
+
+# backward compatible imconvert
+imconvert(im) = im
+if isdefined(:Image)
+    function imconvert(im::Image)
+        if ndims(im) == 2
+            convert(Array{eltype(im), ndims(im)}, im)
+        else
+            permutedims(im.data, (2, 1, 3))
+        end
+    end
+end
 x = Any[
     arrays..., loaded_imgs...,
     loadasset("kittens-look.gif"),
     loadasset("mario", "stand", "right.png"),
     loadasset("mario", "jump", "left.gif"),
 ]
-x = map(x-> convert(Array{eltype(x), ndims(x)}, x), x)
+x = map(imconvert, x)
 
 # visualize all images and convert the array to be a vector of element type context
 # This shouldn't be necessary, but it seems map is not able to infer the type alone

examples/interactive/mario_game.jl

@@ -74,7 +74,7 @@ for verb in ["jump", "walk", "stand"], dir in ["left", "right"]
     end
     path = assetpath("mario", verb, pic)
     sequence = read_sequence(path)
-    gif = map(img->map(RGBA{N0f8}, img), sequence)
+    gif = map(img->convert(Matrix{RGBA{N0f8}}, img), sequence)
     mario_images[verb*dir] = play(gif)
 end
 function mario2image(mario, images=mario_images)