screen size

hunstalix · November 2011

I'm started developing games for android devices, but I have an problem. I want to move my sprite around the screen, but without leaving the screen. There are many devices with various resolution, so how can I get the size of any screen? I can't work with only one fixed resolution.

(Sorry for my bad English, I just learning it

)

atilim · November 2011

Hi,

Here you have 2 options:

1. Gideros have the concept of "automatic screen scaling" to solve this problem. When you right click the project name and select "Properties..." you see options "Scale Mode" and "Logical Dimensions". For example if you determine your logical resolution as "320x480", develop all your code according to this resolution and let Gideros scale your scene according to different hardware resolutions. http://www.giderosmobile.com/documentation/automatic_screen_scaling.html

Also you can learn your logical and real device resolutions by using these functions:

application:getLogicalWidth()
application:getLogicalHeight()
application:getHardwareWidth()
application:getHardwareHeight()

2. You select the scale mode as "No scale - Top Left" to disable automatic scaling and position/scale all your sprites manually. This option is harder to use but sometimes it can be the only option if provided scale modes are not enough.

Also, if you use scaling, preferably create your Textures and Fonts with filtering to improve rendering quality:

Texture.new("image.png", true)
Font.new("font.txt", "font.png", true)

hunstalix · November 2011

Great, thanks for the help!

alexzheng · November 2011

hi,
atilim
automatic screen scaling is a great future for muti-resolution screens.
It would be much better if Scale mode can be selected for specific resolution.
for example, I would like to add more items on the pad than on the phone, without scaling , but perform a scaling between phones

atilim · November 2011

I see. We can support this by an indirect way. (e.g. get the hardware resolution by application:getHardwareWidth(), application:getHardwareHeight() and set scale mode with a function)

alexzheng · November 2011

yes,change scale mode runtime in code

atilim · November 2011

Ok. Then we'll add this option

elcanu · February 2012

Hi, i have a little question.....

how to autoresize ??

I've configured the logical dimensions in 800x480 (GalaxyS in landspace), and triying the different scale modes the program makes some changes in images.....

If i "don't touch" nothing ( No scale-Top Left mode ), and i try to get the hardware size.....the game will be run without scaling problems on any device???

Regards.

***Go Gideros!!! Best open source SDK+IDE for mobile devices.
**my physics based game base code in three days!
*without LUA knowledges

ar2rsawseen · February 2012

application:getHardwareWidth()
wasn't it
application:getDeviceWidth() ?

Just checking

atilim · February 2012

ops..

yes, the correct one is getDeviceWidth(). Most probably I renamed getHardwareWidth to getDeviceWidth just before releasing that version.

atilim · February 2012

hi @elcanu,

You can choose No scale-Top Left mode and scale your scene according to getDeviceWidth() and getDeviceHeight(). But it won't be so easy. So I recommend to use one of the predefined scaling modes.

atilim · February 2012

btw, configure your logical dimensions as 480x800 even if you're programming your game in landscape mode.

ar2rsawseen · February 2012

ops.. yes, the correct one is getDeviceWidth(). Most probably I renamed getHardwareWidth to getDeviceWidth just before releasing that version.

And I almost started to think, that I was looking to incorrect docs (again)

)

btw, configure your logical dimensions as 480x800 even if you're programming your game in landscape mode.

That explains a lot!!!

elcanu · February 2012

hi @elcanu,

You can choose No scale-Top Left mode and scale your scene according to getDeviceWidth() and getDeviceHeight(). But it won't be so easy. So I recommend to use one of the predefined scaling modes.

2: btw, configure your logical dimensions as 480x800 even if you're programming your game in landscape mode.

Yes i'm developing for landscape mode.
And...if i get the device width/height and set the no scale mode.....the app can be outside the screen in small screens??

And...if i set the scale mode to other predefinied scale mode (Like letterbox) the game will be show correctly?? (I must to develop with bigger images??for example the current background res is 480x800, but in some scale mode shows the image smaller than the "real size")

Zizanyman · August 2015

@atlim, can you use both letterbox scaling and application:getContentWidth/Height at the same time? Or will this not work?

ar2rsawseen · August 2015

@Zizanyman it will work but top left coordinate probably will be negative, something like -20,0 for example

Zizanyman · August 2015

@ar2sawseen Never mind fixed my problem by getting rid of relative coordinates (application:getContentWidth/Height) and using letterbox scaling from the resolution I was working in instead. Cause my problem was with the resolution in the android player. But its fixed now.

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