In OpenGL is it possible to retrieve the pixel array from a previously created texture given only the texture ID?
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In OpenGL is it possible to retrieve the pixel array from a previously created texture given only the texture ID?
Yes.
bind it again and call
glGetTexImage()If you don’t want to mess with the texture which is currently bound, you can bind it to a different texture unit. A texture unit is a container which hold a bound texture. you can have one texture bound to every texture unit. OpenGL 2.1 requires that an implementation will have atleast 2 texture units. The default texture unit which you regularly use is unit 0. to switch the current texture unit call
glActiveTexture():