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1 files changed, 90 insertions, 0 deletions

diff --git a/html/examples/animate_gif.wlua b/html/examples/animate_gif.wlua
new file mode 100644
index 0000000..de96d48
--- /dev/null
+++ b/html/examples/animate_gif.wlua
@@ -0,0 +1,90 @@
+require"imlua"
+require"cdlua"
+require"cdluaim"
+require"iuplua"
+require"iupluacd"
+
+gimgs={}
+gimgs.delays={}
+
+ggif=im.FileOpen(iup.GetFile("*.*"))
+
+for i=1, select(3,ggif:GetInfo()) do
+  gimgs[i]=ggif:LoadImage(i-1)
+  err, gimgs[i] = im.ConvertColorSpaceNew(gimgs[i], im.RGB, true)
+  local delay=gimgs[i]:GetAttribute "Delay"
+  if delay then
+    gimgs.delays[i]=delay[1]*10
+  else
+    gimgs.delays[i]=10
+  end
+end
+
+ggif:Close()
+
+function gifanimator(gimgs, behavior, start, final, runyn, initial)
+
+  start=start or 1
+  final=final or #gimgs
+  local increment=1
+  local frame=initial or start
+
+  --hack to get data to canvas action
+  anii=frame
+  return iup.timer{
+    time=gimgs.delays[frame],
+    run=runyn or "YES",
+    action_cb=function(self)
+      self.run="NO"
+      if frame==final then
+        if behavior=="LOOP" then
+          frame=start
+        elseif behavior=="BOUNCE" then
+          increment=-1
+          frame=frame+increment
+        else
+          return nil
+        end
+      elseif frame==start and behavior=="BOUNCE" then
+        increment=1
+        frame=frame+increment
+      else
+        frame=frame+increment
+      end
+      self.time=gimgs.delays[frame]
+      self.run="YES"
+
+      --for the canvas redrawing function
+      anii=frame
+      --redraw the canvas. yeah, it's a bit of a hack.
+      cnv.action()
+    end}
+end
+
+anit=gifanimator(gimgs,"LOOP")--,"BOUNCE",3,20)
+
+cnv = iup.canvas{rastersize = gimgs[1]:Width().."x"..gimgs[1]:Height(),
+ border = "NO",
+ expand = "YES"}
+
+function cnv:map_cb()-- the CD canvas can only be created when the IUP canvas is mapped
+  cdanvas = cd.CreateCanvas(cd.IUP, self)
+end
+
+function cnv:action()-- called everytime the IUP canvas needs to be repainted
+  cdanvas:Activate()
+  gimgs[anii]:cdCanvasPutImageRect(cdanvas, 0, 0, 0, 0, 0, 0, 0, 0) -- use default values
+end
+
+dlg = iup.dialog{cnv,title="Animated Gif Player"}
+
+function dlg:close_cb()
+  iup.Destroy(anit)
+  gimgs=nil --Destroys will be called by the garbage collector
+  cdanvas:Kill()
+  self:destroy()
+  return iup.IGNORE -- because we destroy the dialog
+end
+
+dlg:show()
+iup.MainLoop()