Increase code coverage (#52)

src/DitherPunk.jl

@@ -19,7 +19,6 @@ include("ordered.jl")
 include("ordered_imagemagick.jl")
 include("error_diffusion.jl")
 include("closest_color.jl")
-include("show.jl")
 include("eval.jl")
 
 export dither, dither!

src/api/binary.jl

@@ -26,13 +26,6 @@ dither
 
 # If `out` is specified, it will be changed in place...
 function dither!(out::GenericImage, img::GenericImage, alg::AbstractDither; kwargs...)
-    if size(out) != size(img)
-        throw(
-            ArgumentError(
-                "out and img should have the same shape, instead they are $(size(out)) and $(size(img))",
-            ),
-        )
-    end
     return _binarydither!(out, img, alg; kwargs...)
 end
 
@@ -61,7 +54,7 @@ end
 # when no color palette is provided
 function _binarydither!(
     out::GenericGrayImage, img::GenericGrayImage, alg::AbstractDither; to_linear=false
-) where {T}
+)
     to_linear && (img = srgb2linear.(img))
     return binarydither!(alg, out, img)
 end

src/api/color.jl

@@ -23,13 +23,6 @@ colordither(alg, img, cs, metric) = throw(ColorNotImplementedError(alg))
 
 # If `out` is specified, it will be changed in place...
 function dither!(out::GenericImage, img::GenericImage, alg::AbstractDither, arg; kwargs...)
-    if size(out) != size(img)
-        throw(
-            ArgumentError(
-                "out and img should have the same shape, instead they are $(size(out)) and $(size(img))",
-            ),
-        )
-    end
     return out .= _colordither(eltype(out), img, alg, arg; kwargs...)
 end
 

src/eval.jl

@@ -19,10 +19,3 @@ function test_on_gradient(alg::AbstractDither)
 
     return mosaicview([srgb, dither_srgb, linear, dither_linear]; ncol=1)
 end
-function test_on_gradient(algs::AbstractArray{<:AbstractDither})
-    srgb, linear = gradient_image(100, 800)
-    dithers_srgb = [dither(srgb, alg) for alg in algs]
-    dithers_linear = [dither(linear, alg) for alg in algs]
-
-    return mosaicview([srgb, dithers_srgb..., linear, dithers_linear...]; ncol=1)
-end

src/utils.jl

@@ -8,13 +8,11 @@ Convert pixel `u` from sRGB to linear color space.
 @inline srgb2linear(u::Bool) = u
 
 """
-    linear2srgb(u)
+    upscale(img, scale)
 
-Convert pixel `u` from linear to sRGB color space.
+Upscale image by repeating individual pixels `scale` times.
 """
-@inline linear2srgb(u::Number) = Colors.srgb_compand(u)
-@inline linear2srgb(u::Gray) = typeof(u)(linear2srgb(gray(u)))
-@inline linear2srgb(u::Bool) = u
+upscale(img, scale) = repeat(img; inner=(scale, scale))
 
 if VERSION >= v"1.7"
     _closest_color_idx(px, cs, metric) = argmin(colordiff(px, c; metric=metric) for c in cs)