1 files changed, 77 insertions, 0 deletions
diff --git a/html/examples/rotate_transparent.lua b/html/examples/rotate_transparent.lua
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index 0000000..640826d
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+++ b/html/examples/rotate_transparent.lua
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+-- Contribution by Gustavo Lyrio
+require"imlua"
+require"imlua_process"
+require"cdlua"
+require"cdluaim"
+require"iuplua"
+require"iupluacd"
+
+--IupCanvas Example in IupLua 
+cv       = iup.canvas {rastersize="640x480"}
+dg       = iup.dialog{iup.frame{cv}; title="Rotate Test"}
+
+-- Simple parameters
+width = 640
+height = 480
+screen_width = 1024
+screen_height = 768
+
+image = im.FileImageLoad("flower.jpg")
+Timage = {}
+--Timage.x0 = (width/2) - (image:Width()/2)
+--Timage.y0 = (height/2) - (image:Height()/2)
+Timage.x0 = 0
+Timage.y0 = 0
+
+function cv:action()
+	canvas:Activate()
+	canvas:Clear()
+  if (image2) then
+    image2:cdCanvasPutImageRect(canvas, Timage.x0, Timage.y0, image2:Width(), image2:Height(), 0,0,0,0)
+  end
+	return iup.DEFAULT
+end
+
+function cv:motion_cb(x, y, status)
+	cd.Activate(canvas)
+	y = cd.UpdateYAxis(y)
+	if iup.isbutton1(status) == true then
+	end
+	return iup.DEFAULT
+end
+
+function cv:button_cb(but, pressed, x, y, status)
+	if iup.isbutton1(status) == false then
+	end
+	return iup.DEFAULT
+end
+
+dg:map()
+canvas = cd.CreateCanvas(cd.IUP, cv.handle)
+
+dg:showxy(iup.CENTER, iup.CENTER)
+
+-- Rotation Test
+image:AddAlpha() -- option 1: to avoid a black background
+image:SetAlpha(255)
+
+local w, h = im.ProcessCalcRotateSize(image:Width(), image:Height(), math.cos(math.pi/4), math.sin(math.pi/4))
+image2 = im.ImageCreateBased(image, w, h)
+
+--image2 = im.ImageCreate(w, h, im.RGB, im.BYTE)   -- option 2: to avoid a black background
+--im.ProcessRenderConstant(image2, {255, 255, 255})
+
+im.ProcessRotate(image, image2, math.cos(math.pi/4), math.sin(math.pi/4), 1)
+
+canvas:Activate()
+canvas:Clear()
+
+--original
+--image:cdCanvasPutImageRect(canvas, Timage.x0, Timage.y0, image:Width(), image:Height(), 0,0,0,0)
+
+--processed
+image2:cdCanvasPutImageRect(canvas, Timage.x0, Timage.y0, image2:Width(), image2:Height(), 0,0,0,0)
+
+if (not iup.MainLoopLevel or iup.MainLoopLevel()==0) then
+  iup.MainLoop()
+end