Problem with load many large images

One of my game scene, there are 23 images and size 960x640 for each. All images set visibility to false (object.isVisible = false) but show only first image. When touch on button, next image will be show and current image will be hide. The example code is below:

local bg = {}
local step = 1
for i =1 , 23 do
  bg[i] = display.newImageRect( "bg" .. i .. ".png", 480, 320 )
  bg[i].isVisible = false
  bg[i].x = display.contentWidth / 2
  bg[i].y = display.contentHeight / 2
end
 
local button = display.newRect( 0, 0, 100, 100 )
local function onTouchButton( event )
  if event.phase == "began" then
    bg[step].isVisible = false
    bg[step + 1].isVisible = true
    step = step + 1
  end
end
 
button:addEventListener( "touch", onTouchButton )
 
bg[1].isVisible = true

Dont load them all at the beginning.

If you load one, then load the next one only in response to a touch, you can use transition.to to make the change smoother.

So, Load A as an image, and display it
Touch occurs
Transition.to (A... ) to fade away using alpha, over perhaps one second
Load B as an image
set B alpha to 0
transition.to (B ....) to fade in over perhaps a second

then: display.remove( A)
and that will free up your memory.

Jeff is correct - you may also want to consider using a memory check function as it can help you manage things better.

Try something like this;

local function monitorMem(event)
     collectgarbage("collect")
     
   print( "\nMemUsage: " .. (collectgarbage("count")/1000) .. " MB")
   print("Texture Usage " .. system.getInfo( "textureMemoryUsed" ) / 1000000)
       
   return true
end
 
Runtime:addEventListener("enterFrame", monitorMem)

views:1894 update：2012/2/8 8:46:10


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