CODEWITHSUNDEEP
c++opengltexturestga
Bushes
Bushes

Reputation: 1010

Loading a PVR, texture problems

I'm having a problem with loading a tga from a PVR.

I believe the PVR is loading correctly, but when I try and load the texture into OpenGL I'm getting issues.

I'm getting odd, incoherant drawings. I'll passing the entire texture file I'm making over to my graphics window class and then asking it to get the id which is an unsigned int and then create the texture.

This is my load texture class.

glGenTextures(animalTexture->getID(), &texture[0]);
glBindTexture(GL_TEXTURE_2D, texture[0]);
glTexImage2D(GL_TEXTURE_2D, 0, 3, animalTexture->getWidth(),animalTexture->getHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, animalTexture->getImageData());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

I'm wondering what the cause could be. This method does get called more than once so I'm wondering if you can overwrite a previously generated texture without any issues? Do you have to have a gluint to use to generate a texture? I'm trying to load a tga.

I know this draws successfully with a normal saved image.

Any ideas or help would be mucn appreciated.

p.s Ignore the black spot that was me.

enter image description here

Upvotes: 0

Views: 1565

Answers (1)

bernie
bernie

Reputation: 10390

Have a look at this post. Essentially, as PVR is compressed, you can't send the texture using glTexImage2D which assumes uncompressed texels (each texel being 4 unsigned bytes in the code you posted). You must use glCompressedTexImage2D instead which handles compressed formats. Have a look at this OpenGL es extension to know which internal format to use. If you're not too sure which one to choose or just want to view your compressed textures, PVRTexTool looks like a nice tool.

Upvotes: 1

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