When using display.loadRemoteImage, how can you get the resolution of the resulting image?

Audio and Graphics
#1

I am wanting to be able to scale images to fit the screen and need to know what the scale factor to set. 

To know that I need to know the image size. Since it is a downloaded image, how can I tell the image dimensions?

#2

You could try saving it to disk and then load it with display.newImage().  Once loaded you can access width and height.

#3

Tip: SSK2 comes with a handy utility that does exactly what SGS says:

https://roaminggamer.github.io/RGDocs/pages/SSK2/libraries/misc/#getimagesize

Source:

misc.getImageSize = function ( path, basePath ) basePath = basePath or system.ResourceDirectory local tmp = display.newImage( path, basePath, 10000,10000 ) if( not tmp ) then return 0, 0 end local sx = tmp.contentWidth local sy = tmp.contentHeight display.remove(tmp) return sx,sy end
#4

Alternately, if you control the server code, you could simply return the width and height of the image as part of the response.

#5

As it turns out, the resulting image downloaded details are handled by the listener…

local function imagenetworkListener( event )

    if ( event.isError ) then

        print ( “Network error - download failed” )

    else

        event.target.alpha = 0

        transition.to( event.target, { alpha = 1.0 } )

    end

    print("Image height: ",event.target.height) 

    print("Image Width: ",event.target.width) 

    print ( "event.response.fullPath: ", event.response.fullPath )

    print ( "event.response.filename: ", event.response.filename )

    print ( "event.response.baseDirectory: ", event.response.baseDirectory )

}

#6

You could try saving it to disk and then load it with display.newImage().  Once loaded you can access width and height.

#7

Tip: SSK2 comes with a handy utility that does exactly what SGS says:

https://roaminggamer.github.io/RGDocs/pages/SSK2/libraries/misc/#getimagesize

Source:

misc.getImageSize = function ( path, basePath ) basePath = basePath or system.ResourceDirectory local tmp = display.newImage( path, basePath, 10000,10000 ) if( not tmp ) then return 0, 0 end local sx = tmp.contentWidth local sy = tmp.contentHeight display.remove(tmp) return sx,sy end
#8

Alternately, if you control the server code, you could simply return the width and height of the image as part of the response.

#9

As it turns out, the resulting image downloaded details are handled by the listener…

local function imagenetworkListener( event )

    if ( event.isError ) then

        print ( “Network error - download failed” )

    else

        event.target.alpha = 0

        transition.to( event.target, { alpha = 1.0 } )

    end

    print("Image height: ",event.target.height) 

    print("Image Width: ",event.target.width) 

    print ( "event.response.fullPath: ", event.response.fullPath )

    print ( "event.response.filename: ", event.response.filename )

    print ( "event.response.baseDirectory: ", event.response.baseDirectory )

}