Hot-swap Bitmap

Share your ZGE-development tips and techniques here!

Moderator: Moderators

Post Reply
User avatar
Kjell
Posts: 1715
Joined: Sat Feb 23, 2008 11:15 pm

Hot-swap Bitmap

Post by Kjell » Sat May 07, 2016 8:45 am

:!:

In case you're using a lot of imported images, attached is a example that swaps out the data of a imported Bitmap at run-time ( to ensure that only 1 texture resides on the GPU at once ) .. press 1 or 2 on your keyboard to load a image.

K
Attachments
Hot-swap.zgeproj
(189.03 KiB) Downloaded 288 times

User avatar
Rado1
Posts: 771
Joined: Wed May 05, 2010 12:16 pm

Re: Hot-swap Bitmap

Post by Rado1 » Sat May 07, 2016 6:55 pm

Nice trick to use files in this way. But are not embedded files loaded to memory as well? People would maybe appreciate runtime loading of bitmap files from file system.

User avatar
Kjell
Posts: 1715
Joined: Sat Feb 23, 2008 11:15 pm

Re: Hot-swap Bitmap

Post by Kjell » Sat May 07, 2016 7:04 pm

Hi Rado1,
Rado1 wrote:But are not files loaded to memory as well?
The only thing that this method does is recycle the memory allocated for a texture on the GPU.

So if you'd for instance have a slideshow of 20 Bitmaps ( 512x288 ) by simply swapping MaterialTexture.Texture .. it would use 0.6MB of GPU RAM when the slideshow starts, 1.2MB after the 2nd image has been shown and 11MB once all images have been shown. Whereas using this technique you're always using only 0.6MB.
Rado1 wrote:People would maybe appreciate runtime loading of bitmap files from file system.
Sure, you don't have to embed the file if you don't want to ;)

K

Post Reply