This is pretty cool, i like, but there are a few small tweaks which would make a huge impact on performance:
-You'd get way better performance if you switch over to luaplayer mod4, and use "fastblit" instead of "blit". Just look into it, trust me.
-Dont use so many buffers. do you really *need* separate win.content, win.top, *and* win.window image buffers? thats a lot of overhead per window. It'd probably be better to blit win.top and win.content directly to screen with two separate blits, you'd be doing less blitting overall and you'd reduce memory usage by half.
-You're reblitting every window to screen every loop.very wasteful.Here's a code clip (from a windowing system i toyed with a while back) that might give a better idea:
Code:
--This function creates a new VisibleObject
function VisibleObject.new()
local new_inst = {}
setmetatable(new_inst,{__index = VisibleObject})
new_inst.isVisible = true
new_inst.drawCount = 2
end
--[[VisibleObject.drawCount: This value (when>0)
causes this object to be drawn, and is == to the number
of frames an update has left to draw + 1. The extra 1 is
to update the screen buffer, incase the next screen:flip
is caused by a different visible object. Thus, for a 1 frame
screen update (the most common), set drawCount = 2 ]]--
--[[VisibleObject.draw(): draws object to screen, if
drawCount merits it (and if the item is visible of course).
Returns true if thescreen should be flipped to show
changes, false if it shouldn't (returns false for
drawCount==1, since in that case we're only updating
the screen-buffer for subsequent screen:flips)]]--
function VisibleObject:draw()
local drawCount = self.drawCount
if self.isVisible and drawCount>0 then
self.drawCount=drawCount-1
self:drawBody()
return drawCount~=1
else
return false
end
end
VisibleObjects = {}
local exampleObject = VisibleObject.new()
exampleObject.tick = --[[whatever function the objects supposed to do each cycle]]--
exampleObject.drawBody = --[[draws itself to the screen]]--
table.insert(VisibleObjects, exampleObject)
while KeepRunning do --main loop
buttonHandling() --handles the buttons, obviously!
local flip = false
Image.startBlit()
for i,vO in ipairs(VisibleObjects) do
vO:tick()
if vO:draw() then
flip = true
end
end
Image.endBlit()
if flip then
screen.waitVblankStart()
screen.flip()
end
end
[WIP/RELEASE] 7WiN - Lua Windowing System
), a music player (it plays a test .xm file from Shine's Snake Game without clipping) and a test window with buttons that do stuff to the window.
