Merge pull request #11 from JuliaImages/imshow

bugfix imshow for non-colorant arrays. fixes #10

Author: Evizero

src/imshow.jl

@@ -48,6 +48,7 @@ end
 
 imshow(io::IO, img, args...) = imshow(io, img, colormode[1], args...)
 imshow(img, args...) = imshow(STDOUT, img, colormode[1], args...)
+imshow(io::IO, img, colordepth::TermColorDepth, args...) = throw(ArgumentError("imshow only supports colorant arrays with 1 or 2 dimensions"))
 
 """
     imshow256([stream], img, [maxsize])

test/tst_imshow.jl

@@ -10,6 +10,10 @@
 end
 
 @testset "imshow" begin
+    @testset "non colorant" begin
+        @test_throws ArgumentError imshow(rand(5,5))
+        @test_throws ArgumentError imshow(sprand(5,5,.5))
+    end
     @testset "lena" begin
         img = imresize(lena, 10, 10)
         io = IOBuffer()
@@ -20,6 +24,10 @@ end
 end
 
 @testset "imshow256" begin
+    @testset "non colorant" begin
+        @test_throws ArgumentError imshow256(rand(5,5))
+        @test_throws ArgumentError imshow256(sprand(5,5,.5))
+    end
     @testset "rgb line" begin
         io = IOBuffer()
         imshow256(io, rgb_line)
@@ -48,6 +56,10 @@ end
 end
 
 @testset "imshow24bit" begin
+    @testset "non colorant" begin
+        @test_throws ArgumentError imshow24bit(rand(5,5))
+        @test_throws ArgumentError imshow24bit(sprand(5,5,.5))
+    end
     @testset "rgb line" begin
         io = IOBuffer()
         imshow24bit(io, rgb_line)