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COPYRIGHT = """\
/*
* Copyright 2017 Google
*
* 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.
*/
"""
# stdlib
import argparse
from sys import stdout
from mako.template import Template
# local
import format_parser
def parse_args():
p = argparse.ArgumentParser()
p.add_argument("csv")
p.add_argument("out")
return p.parse_args()
def get_rgbx_to_rgba_map(formats):
names = {fmt.name for fmt in formats}
for fmt in formats:
if not fmt.has_channel('r') or not fmt.has_channel('x'):
continue
# The condition above will still let MESA_FORMAT_R9G9B9E5_FLOAT
# through. We need to ensure it actually has an X in the name.
if not 'X' in fmt.name:
continue
rgbx_name = fmt.name
rgba_name = rgbx_name.replace("X", "A")
if rgba_name not in names:
continue;
yield rgbx_name, rgba_name
TEMPLATE = Template(COPYRIGHT + """
#include "formats.h"
/**
* If the format has an alpha channel, and there exists a non-alpha
* variant of the format with an identical bit layout, then return
* the non-alpha format. Otherwise return the original format.
*
* Examples:
* Fallback exists:
* MESA_FORMAT_R8G8B8X8_UNORM -> MESA_FORMAT_R8G8B8A8_UNORM
* MESA_FORMAT_RGBX_UNORM16 -> MESA_FORMAT_RGBA_UNORM16
*
* No fallback:
* MESA_FORMAT_R8G8B8A8_UNORM -> MESA_FORMAT_R8G8B8A8_UNORM
* MESA_FORMAT_Z_FLOAT32 -> MESA_FORMAT_Z_FLOAT32
*/
mesa_format
_mesa_format_fallback_rgbx_to_rgba(mesa_format format)
{
switch (format) {
%for rgbx, rgba in rgbx_to_rgba_map:
case ${rgbx}:
return ${rgba};
%endfor
default:
return format;
}
}
""");
def main():
pargs = parse_args()
formats = list(format_parser.parse(pargs.csv))
template_env = {
'rgbx_to_rgba_map': list(get_rgbx_to_rgba_map(formats)),
}
with open(pargs.out, 'w') as f:
f.write(TEMPLATE.render(**template_env))
if __name__ == "__main__":
main()
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