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Fix alpha channel in rotate #55

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Fix alpha channel in rotate #55

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6 changes: 5 additions & 1 deletion magick/wand/image.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -144,7 +144,7 @@ do
end
return handle_result(self, lib.MagickSharpenImage(self.wand, radius, sigma))
end,
rotate = function(self, degrees, r, g, b)
rotate = function(self, degrees, r, g, b, a)
if r == nil then
r = 0
end
Expand All @@ -154,10 +154,14 @@ do
if b == nil then
b = 0
end
if a == nil then
a = 0
end
local pixel = ffi.gc(lib.NewPixelWand(), lib.DestroyPixelWand)
lib.PixelSetRed(pixel, r)
lib.PixelSetGreen(pixel, g)
lib.PixelSetBlue(pixel, b)
lib.PixelSetAlpha(pixel, a)
local res = {
handle_result(self, lib.MagickRotateImage(self.wand, pixel, degrees))
}
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