[SOLVED] Unigine::Texture::copy2D()

[naumova.natalya]

Hi!

I've been trying to merge multiple textures through this code:

render_state->saveState();
render_state->clearStates();
texture_render->setColorTexture(0, src);
texture_render->enable();
{
  dest->copy2D(x0, y0, x1, y1, w, h);
}
texture_render->disable();
texture_render->unbindColorTexture();
render_state->restoreState();

The problem is: I can't copy the copied texture, i.e.:

1. copy texture_0 into texture_1

output: texture_0 == texture_1

2. copy texture_1 into texture_2

output: texture_1 != texture_2

 

Maybe I'm missing some steps? Thank you for your help in advance!

[silent]

Natalya,

What kind of task you are trying to achieve with that? Can you show us what input you have and what output you want to get?

Thanks!

[naumova.natalya]

I need to create a texture (3) which consists of centers from camera images. So each frame I need to "take a snapshot" from camera (1), crop the middle area (2), create temp texture to copy into it old result texture (with an Y offset size of crop space), then copy the new crop into it, and finaly copy temp texture into result texture (3).

But now I can only "take a snapshot" from camera and crop the center from it. When I try to merge this center into temporary texture it won't copy (temporary texture remains blank). Though when I try to copy the snapshot into this temp texture (for debug reasons, to check whether I created this temp texture right) it copies no problems.

Hope that this explanation is clear :)

Edited January 30, 2019 by naumova.natalya

[naumova.natalya]

All the cropping I'm doing through that piece of code that I've shown before

[silent]

Natalya,

To get this work you need to have texture with the same format (if you are grabbing RGBA8 and then combining to a final texture - it should be also a RGBA8). 

Could you please prepare a small test sample (it can be even based on already existing sample from C++ API section) so we can check in details what is going on?

Thanks!

[naumova.natalya]

Here is the 7z archive. The copying mechanism is in the TextureHandler::add_chunk_to_result_texture()

TestCopy2D.7z

[silent]

Thanks for the test scene! We will take a closer look during this week.

[naumova.natalya]

OK, thank you!

[silent]

Natalya,

Please, check modified TextureHandler.cpp in attachment. Here is the result of rendering of a single camera:

TextureHandler.cpp

Thanks!

[naumova.natalya]

this is exactly what i wanted, thank you!!