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#!/usr/bin/env python3
import sys
import re
from itertools import chain, combinations
def powerset(s):
return chain.from_iterable(combinations(s, r) for r in range(len(s) + 1))
def case_print(f, c, s):
f.write('\tcase {}:\n'.format(c))
f.write('\t\treturn "{}";\n'.format(s))
def afbc_print(f, l):
fmt = 'DRM_FORMAT_MOD_ARM_AFBC({})'
if l:
# Strip prefix to stop string being stupidly long
short = [s[len('AFBC_FORMAT_MOD_'):] for s in l]
case_print(f, fmt.format('|'.join(l)), fmt.format('|'.join(short)))
else:
case_print(f, fmt.format(0), fmt.format(0))
info = {
'fmt': r'^#define (\w+)\s*(?:\\$\s*)?fourcc_code',
'basic_pre': r'\bI915_FORMAT_MOD_\w+\b',
'basic_post': r'\b(DRM_FORMAT_MOD_(?:INVALID|LINEAR|SAMSUNG|QCOM|VIVANTE|NVIDIA|BROADCOM|ALLWINNER)\w*)\s',
'afbc_block': r'\bAFBC_FORMAT_MOD_BLOCK_SIZE(?:_\d+x\d+)+\b',
'afbc_bitmask': r'\bAFBC_FORMAT_MOD_[A-Z]+\b',
}
with open(sys.argv[1], 'r') as f:
data = f.read()
for k, v in info.items():
info[k] = re.findall(v, data, flags=re.M)
with open(sys.argv[2], 'w') as f:
f.write('''\
#include <stdint.h>
#include <drm_fourcc.h>
#include "tables.h"
const char *format_str(uint32_t format)
{
switch (format) {
case DRM_FORMAT_INVALID:
return "INVALID";
''')
for ident in info['fmt']:
case_print(f, ident, ident[len('DRM_FORMAT_'):])
f.write('''\
default:
return "Unknown";
}
}
const char *modifier_str(uint64_t modifier)
{
switch (modifier) {
''')
for ident in info['basic_pre'] + info['basic_post']:
case_print(f, ident, ident)
# ARM framebuffer compression
# Not all of the combintations we generate will be valid modifers exposed
# by the driver
for bits in powerset(info['afbc_bitmask']):
bits = list(bits)
bits.sort()
afbc_print(f, bits)
for block in info['afbc_block']:
afbc_print(f, bits + [block])
f.write('''\
default:
return "Unknown";
}
}
''')
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