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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* @file
* Utility functions to make assertions about formats.
*
* This module centralizes most of logic used when determining what algorithm
* is most suitable (i.e., most efficient yet correct) for a given format.
*
* It might be possible to move some of these functions to u_format module,
* but since tiny differences in the format my render it more/less
* appropriate to a given algorithm it is impossible to make any long term
* guarantee about the semantics of these functions.
*
* @author Jose Fonseca <jfonseca@vmware.com>
*/
#include "util/u_format.h"
#include "lp_bld_format.h"
/**
* Whether this format is a 4 rgba8 variant
*/
boolean
lp_format_is_rgba8(const struct util_format_description *desc)
{
unsigned chan;
if(desc->block.width != 1 ||
desc->block.height != 1 ||
desc->block.bits != 32)
return FALSE;
for(chan = 0; chan < 4; ++chan) {
if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
desc->channel[chan].type != UTIL_FORMAT_TYPE_SIGNED &&
desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
return FALSE;
if(desc->channel[chan].size != 8)
return FALSE;
}
return TRUE;
}
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