I need help you.
I am recovering pixels value of a image, 16 bits, single value, when I load a data to graphics card, I have a segmentation error.
My code is:
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, width, heigth, depth, 0, GL_LUMINANCE,GL_UNSIGNED_SHORT , vol);
this parameters are, width, heigth, dept, and vol,
any suggestion? I was intended to load the data as LUMINANCE or INTENSITY, but also gives me error.
are you sure vol is big enough ?
24widthheight*depth bytes ?
Doesnt luminance take single component?
There could be also the thing with pack/unpack alignment being 4 by default (depending on the texture dimensions).
Yes, my bad, I stopped at the internal format GL_RGBA (why not GL_LUMINANCE8 by the way ?), the *4 should not be here.
And you are right, default alignment is 4 bytes, so that can matter if the 3D texture is non-power-of-two.
Try this otherwise :
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