Opengles slideshow

[rexsj]

Hello........my doubt is......Can i update my textures on opengles??
Right now, I am displaying 3 png images.......but will it be possible to display next 3 images after some delay?
I have been trying to do this...........and i found no post related to this.
Please help.Thanks in advance

[rexsj]

I dont know if my question is unclear.....
Do i have to use some add-on for running a slideshow on opengles? what are the options possible ?
i am using freeimage to load the png image and render it to the screen via opengles.
Now how do i show it in a sequence?
Any small help will be appreciated..........thanks

[-rst-]

I am definitely not an expert in OpenGL, but could it be just this simple (pseudo code, as your dev language not mentioned):

Code: Select all

main_func() {

  while more images {
    img1 = load_image()
    apply_image_to_texture1()
    img2 = load_image()
    apply_image_to_texture2()
    img2 = load_image()
    apply_image_to_texture2()

    update_display()

    sleep(x seconds)
  }

}

If you start from the hello_triangle example, could you just call the init_textures() in the beginning of the update_model() (or redraw_model()) to load the next set of images?

How does your code look like now?

Regards,

JP

[rexsj]

Thats exactly what i was doing........but update dint work,
it was some problem with glLoadTexture function.now its working fine.
Thanks a lot

[rexsj]

there is some strange problem ........that the power of 2 images distort on the screen, while non of power of two images work fine with the scaling function. Pls tell me whats going wrong!!!

[PeterO]

there is some strange problem ........that the power of 2 images distort on the screen, while non of power of two images work fine with the scaling function. Pls tell me whats going wrong!!!

In what way are they "distorted" ?
PeterO

[rexsj]

I have attached the image

[PeterO]

The circles look circular to me so I'm not sure what you mean by "distorted".
PeterO

[rexsj]

I have attached the image

The original files attached

[-rst-]

So you mean the 'backgrounds' you got in your screenshot are undesired artifacts?

[rexsj]

ok, so these are only background distortions. can somebody help to solve this?
i tried using freeimage_setbackgroundcolor and istransparent functions......

[rexsj]

I used the composite function and it is working fine to give the white background for images...
thanks @rst for the help