Image performance with extra transparent area

[valery_iwanofu]

I'm making an ADV game and I have a couple of questions about images with extra transparent area.
I'm trying to make interactive objects using the screen system and I found the following options to implement this:

1. imagebutton with focus_mask and screen size image

   Code: Select all

   imagebutton:
       idle 'images/objects/Door.png'
       hover 'images/objects/Door_Hover.png'
       focus_mask True
       action NullAction()
   

2. imagebutton with cropped image and specified position

   Code: Select all

   imagebutton:
       idle 'images/objects/Door.png'
       hover 'images/objects/Door_Hover.png'
       #focus_mask True
       
       xpos 500
       ypos 600
       
       action NullAction()
   

3. same as previous but Null used instead of idle image(background image contains idle image)

   Code: Select all

   imagebutton:
       idle Null(width=300, height=600)
       hover 'images/objects/Door_Hover.png'
       
       xpos 500
       ypos 600
       
       action NullAction()
   

First option is simple but slow.
Second and third options have better performance but require manual image positioning.

The question is, how slow is the focus_mask with a 1920x1080 image and is it worth optimizing?

[Alex]

...The question is, how slow is the focus_mask with a 1920x1080 image and is it worth optimizing?

First thing to optimize - declare all images and use aliases instead of direct file paths in buttons

Code: Select all

image door_idle:
    'images/objects/Door.png'

image door_hover:
    'images/objects/Door_Hover.png'


screen screen_name():
    imagebutton:
        idle 'door_idle'
        hover 'door_hover'
        focus_mask True
        action NullAction()

And it's better to positioning small buttons onscreen rather than have fullscreen-sized ones.

Check some links
viewtopic.php?f=8&t=52419&p=498567&hilit=cache#p498567

viewtopic.php?f=51&t=47328&p=479085&hilit=cache#p479085

https://www.renpy.org/doc/html/config.h ... cache_size