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1 files changed, 50 insertions, 0 deletions

diff --git a/html/examples/process.lua b/html/examples/process.lua
new file mode 100644
index 0000000..5a32586
--- /dev/null
+++ b/html/examples/process.lua
@@ -0,0 +1,50 @@
+require"imlua"
+require"imlua_process"
+
+function save_histogram (hist, filename, format)
+	local height = 200 -- altura da imagem
+	local max = math.max(unpack(hist)) -- pega o maior valor do histograma
+	local n = table.getn(hist) + 1 -- zero-based
+	local image = im.ImageCreate(n, height, im.GRAY, im.BYTE) -- cria a imagem
+	local white = 255
+	local black = 0
+
+	local render = function (x, y, d, param)
+		local v = hist[x] / max
+		local h = v * height
+		if y <= h then return black end
+		return white
+	end
+
+	im.ProcessRenderOp(image, render, "histogram", {}, 0)
+	image:Save(filename, format)
+end
+
+local filename = "lena.jpg"
+
+local image = im.FileImageLoad(filename)
+
+save_histogram(im.CalcHistogram(image, 0, 0), "lena_histogram_R.gif", "GIF")
+save_histogram(im.CalcHistogram(image, 1, 0), "lena_histogram_G.gif", "GIF")
+save_histogram(im.CalcHistogram(image, 2, 0), "lena_histogram_B.gif", "GIF")
+save_histogram(im.CalcGrayHistogram(image, 0), "lena_histogram_gray.gif", "GIF")
+
+local r = im.ImageCreate(image:Width(), image:Height(), im.GRAY, image:DataType())
+local g = im.ImageCreate(image:Width(), image:Height(), im.GRAY, image:DataType())
+local b = im.ImageCreate(image:Width(), image:Height(), im.GRAY, image:DataType())
+im.ProcessSplitComponents(image, { r, g, b})
+r:Save("lena_r.jpg", "JPEG")
+g:Save("lena_g.jpg", "JPEG")
+b:Save("lena_b.jpg", "JPEG")
+
+local rgb = image:Clone()
+im.ProcessMergeComponents({r, g, b}, rgb)
+rgb:Save("lena_rgb.jpg", "JPEG")
+
+local replace = image:Duplicate()
+im.ProcessReplaceColor(image, replace, { 146, 93, 145 }, { 255, 0, 255 })
+replace:Save("lena_replace.jpg", "JPEG")
+
+local bitmask = image:Duplicate()
+im.ProcessBitMask(image, bitmask, "01111010", im.BIT_XOR)
+replace:Save("lena_bitmask.jpg", "JPEG")