diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_format_query.c')
-rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_format_query.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_format_query.c b/src/gallium/drivers/llvmpipe/lp_bld_format_query.c new file mode 100644 index 0000000..f3832d0 --- /dev/null +++ b/src/gallium/drivers/llvmpipe/lp_bld_format_query.c @@ -0,0 +1,72 @@ +/************************************************************************** + * + * 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; +} |