12 Jan
2010
12 Jan
'10
9:05 a.m.
Kenny Riddile wrote:
Kenny Riddile wrote:
I do this to load GIL images as OpenGL textures and it works fine for me:
reinterpret_cast
( interleaved_view_get_raw_data(imageView) ) Also, I've noticed that OpenGL interprets the image data upside down, so I flip it prior to calling glTexImage2D using flipped_up_down_view. Flipping the image data seems to be common practice when loading OpenGL textures based on what I've read online. You can flip the image, but it is more efficient to flip the texture coordinates on Y (or T) axis. If you have a lot of texture coordinates, you can set a texture matrix (glMatrixMode(GL_TEXTURE)) that flips them on hardware.