Does not GLES20 Have GL_HALF_FLOAT_OES?

Question

My question is simple. Why isn't there any GL_HALF_FLOAT_OES constant on Java side in GLES20.java class? However, "GLES2/gl2ext.h" on native side, has it... what happens if i specify value of this C constant on Java side manually? Do you think it is not valid and this is why they had not included it within GLES20.java class?

Answer 1

Float point textures are not a part of OpenGL ES 2.0 specs that's why they are not included in gl2ext.h. And please note that they are available only if GPU supports GL_EXT_color_buffer_half_float extension so you should check presence of this extension first.

Basically, you won't find constants for a lot of vendor-specific stuff too. This doesn't mean these values are invalid and it is absolutely OK to define these constants in code (my code has a lot of such constants, to name a few - constants for DXT/PVRTC compression and Tegra's CSAA).