request. IMAGE instead of USERDATA

[whiteland92]

if you are using "type(image)" it return "userdata", would it be possible change it to "image" ?
and is it possible to load images from a url, without saving it to your pc?

Code: Select all

local http = require"socket.http" 

http.request{
  url = "http://i.imgur.com/YGmjfbG.jpg",
   sink = function(chunk, err)
      if chunk then
          f = love.filesystem.newFile("cat.png")
          f:open('a')
          f:write(chunk)
          f:close()
      end
      return 1
   end
}
error(type(love.graphics.newImage("cat.png")),2,love.filesystem.remove("cat.png"))

[Nixola]

You can use [wiki] love.filesystem.newFileData[/wiki] for the latter.

[whiteland92]

and so it does. thanks

[zorg]

For the former, using [wiki]Object:type[/wiki] instead of lua's type function would be the solution.

[whiteland92]

well that was fast and easier then i though it would be. thank you so much. both of you

works like a charm

Code: Select all

local http = require"socket.http" 

local data = love.graphics.newImage( love.filesystem.newFileData( http.request("http://i.imgur.com/YGmjfbG.jpg") , "" , "file" ) )

error(data:type(),2)

--> Error: Image

[T-Bone]

One thing that would be useful however, was if Lua's error messages would say the Löve type name it was expecting. So if you did

Code: Select all

love.graphics.draw("cat.png", 10, 10)

You'd get an error saying "expected Drawable, got string" instead of the current "expected Userdata, got string".

Maybe that'd be very hard to implement?

[slime]

It already does that:

Code: Select all

love.graphics.draw("cat.png", 10, 10)

Error: main.lua:1: bad argument #1 to 'draw' (Drawable expected, got string)

[whiteland92]

one problem i found is that if you are using Löve ":type()" on string,number,table.... it crashes the program.

example

Code: Select all

local text = "Hello World!"
local textType = text:type()

-- this will fail and "blue screen"  --> Main.lua 2: attempt to call method 'type' (a nil value)

[zorg]

That's to be expected since löve doesn't modify the metatables for basic types (if they have/support one anyway), so it does not add type to them as a callable function.

[Robin]

You can use this function for that:

Code: Select all

function realType(obj)
    return obj.type and obj:type() or type(obj)
end