Loading big texture outside display()

OpenGL Development JOGL Development
#1

I’m using GLJPanel inside a Swing application for a list of screenshots,about 1024x768
I want to create textures from images when it need and not on init()
I can’t load in display() because it stop the paint for about 1sec.
i try to load with TextureIO.newTexture() in a separate Thread but it say that it is out of opengl thread…

What the best way for load big texture at runtime ?

thanks

#2

You can load the TextureData (http://download.java.net/media/jogl/builds/nightly/javadoc_public/com/sun/opengl/util/texture/TextureData.html) via TextureIO.newTextureData() in a separate Thread and create the Texture in the next display() with a TextureIO.newTexture(textureData) call.

#3

I have try with your suggestion but is there the same problem…
it takes 0 ms for newTextureData(bufferedimage, true) from external threa and around 1000 ms for newTexture(texdata)
why if i call getMipmapData() it return null and getBuffer() return a java.nio.HeapByteBuffer, i was thinking if i pass true to newTextureData it generates mipmapdata ? no?
can manually generate mipmap from the external Thread ?
what i’m wrong?

#4

It’s probably the software generation of mipmaps that’s slowing you down. It’s likely the reason you’re falling back to software mipmap generation is that your images are non-power-of-two and your graphics card doesn’t have full NPOT texture support (JOGL guesses this by the presence of the GL_ARB_texture_non_power_of_two extension). I would recommend you either turn off the request to mipmap these textures, or pre-scale them to power-of-two dimensions if you can do that.

#5

yes !
the power of 2 was the problem.
now it took few ms
thank you very much!