A simple gadget request

[beherith]

I would like to request a gadget that does three things: It gets called init it gets called on viewresize And it has a single function that can be called from any unsynced gadget and any widget which returns a string.

I totally fail at the gadget interoperability, and have wasted a day and gotten nowhere with it :(

Any favor barter offers are welcome.

[Bluestone]

I'll do it.

What string do you want it to return? And what do you mean by 'called' on view resize and init - where should it return to in these cases?

[beherith]

It will return a string that is a handle to a lua texture. It should just return to itself when called in resize and init, like a normal gadget.

[beherith]

Aparrently, its ok if this is just a widget, too: ​http://springrts.com/phpbb/viewtopic.php?f=23&t=31243

[Bluestone]

I am lost here - the texture (and its 'string' identifier) is only valid within the lua state that it's created in, so it wouldn't help to know what that identifier was in another lua state unless you'd also sent the entire texture over.

I guess jKs Script.LuaUI solution works (didn't test it) and the fact that jK didn't use _G suggests that my _G solution won't, I guess because of the amount of data involved.

Do you have code that creates + binds the texture you're interested in? And then I can play with it and try and send it somewhere.

[beherith]

function widget:GetInfo()
  return {
    name      = "Screencopy Manager",
    desc      = "Makes a copy of the screen to a texture to share to bloom, los and distortionfbo",
    author    = "Beherith",
    date      = "Nov 2013",
    license   = "GNU GPL, v2 or later",
    layer     = -1000000000,
    enabled   = true  --  loaded by default?
  }
end

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
local screenTexture = nil
local vsx =0 
local vsy =0
local lastupdate = 0


local glCopyToTexture = gl.CopyToTexture
local glCreateTexture = gl.CreateTexture
local glDeleteTexture = gl.DeleteTexture
local spGetDrawFrame  = Spring.GetDrawFrame


function widget:Initialize()
	Spring.Echo('Welcome to the fx_screencopy_manager!')
	if glCopyToTexture == nil then
		Spring.Echo('Sorry you are screwed with no glCopyToTexture support')
		return
	end
	screenTexture = gl.CreateTexture(vsx,vsy, {
		min_filter = GL.LINEAR,
		mag_filter = GL.LINEAR,
		wrap_s   = GL.CLAMP_TO_EDGE,
		wrap_t   = GL.CLAMP_TO_EDGE,
		})
end

function widget:ViewResize(viewSizeX, viewSizeY)
	Spring.Echo('fx_screencopy_manager:viewresize')
	vsx = viewSizeX
	vsy = viewSizeY
	if screenTexture then
		glDeleteTexture(screenTexture)
	end
	screenTexture = gl.CreateTexture(vsx,vsy, {
		min_filter = GL.LINEAR,
		mag_filter = GL.LINEAR,
		wrap_s   = GL.CLAMP_TO_EDGE,
		wrap_t   = GL.CLAMP_TO_EDGE,
		})
end

function widget:GameFrame(n)
	if n>lastupdate+30 and screenTexture then
		glDeleteTexture(screenTexture)
	end
end

function GetScreenCopy()
	if screenTexture == nil then
		Spring.Echo('Creating new screenTexture')
		widget:ViewResize(vsx,vsy)
	end
	if lastupdate < spGetDrawFrame() then
		lastupdate=spGetDrawFrame() 
		glCopyToTexture(screenTexture, 0, 0, 0, 0, vsx, vsy, nil,0)
	end
	return screenTexture
end

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

[Bluestone]

We can close this now, right?

[Bluestone]

fixed by [1910]

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