Does anyone know how popular or well supported GL_RGBA12 and GL_RGBA16 internal texture formats are? Also GL_ALPHA12 and GL_ALPHA16?
Further, what happens when you draw a GL_RGBA16 texture to a GL_RGBA8 backbuffer? Does it chop off the lower 8-bits of each component, or does it divide the values by 2?
Further, what happens when you draw a GL_RGBA16 texture to a GL_RGBA8 backbuffer? Does it chop off the lower 8-bits of each component, or does it divide the values by 2?