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In the following code:
gl_FragColor = vColor * texture2D(u_Texture, v_TexCoordinate);
I noticed the default value returned by texture2D is a white (1,1,1,1) if u_Texture is unbound.
Is it safe to base my shader on this fact?
I wouldn’t have thought so.
I have seen other instances where the default value has been black. It could theoretically be any colour in the case where the memory used by the sampler is a section of uninitialised video memory, it depends on the opengl implementation