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mesa: add GL_HALF_FLOAT as supported type to readpixels
EXT_color_buffer_float spec states:
"An INVALID_OPERATION error is generated ... if the color buffer is
a floating-point format and type is not FLOAT, HALF FLOAT, or
UNSIGNED_INT_10F_11F_11F_REV."
This means that GL_HALF_FLOAT type should be supported when color
buffer has floating-point format.
Fixes Android CTS test android.view.cts.PixelCopyTest.
v2: remove comments of EXT_color_buffer_half_float as
EXT_color_buffer_float can use type GL_HALF_FLOAT
Signed-off-by: Lin Johnson <johnson.lin@intel.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>