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mesa: implement missing glGet(GL_RGBA_SIGNED_COMPONENTS_EXT) query

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This is part of the GL_EXT_packed_float extension.

Bugzilla: http://bugs.freedesktop.org/show_bug.cgi?id=73096
Cc: 10.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
This commit is contained in:
Brian Paul
2014-01-06 12:50:43 -07:00
parent 7db56ddee0
commit 3486f6f31b
4 changed files with 47 additions and 0 deletions
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19
src/mesa/main/formats.c
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@@ -1966,6 +1966,25 @@ _mesa_is_format_unsigned(gl_format format)
}
/**
* Does the given format store signed values?
*/
GLboolean
_mesa_is_format_signed(gl_format format)
{
if (format == MESA_FORMAT_R11_G11_B10_FLOAT) {
/* this packed float format only stores unsigned values */
return GL_FALSE;
}
else {
const struct gl_format_info *info = _mesa_get_format_info(format);
return (info->DataType == GL_SIGNED_NORMALIZED ||
info->DataType == GL_INT ||
info->DataType == GL_FLOAT);
}
}
/**
* Return color encoding for given format.
* \return GL_LINEAR or GL_SRGB