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Kenneth Graunke authored
Tessellation control shaders are optional, but evaluation shaders will always be present when using tessellation. However, we'll always enable the TCS (HS) hardware stage when using tessellation - we'll just create a program on the fly. That program, however, won't have a gl_program or gl_shader_program. So we shouldn't check brw->tess_ctrl_program or shader_prog->_LinkedShaders[MESA_SHADER_TESS_CTRL] - if we want to know whether tessellation is enabled, we should look for a TES. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
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