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#!/usr/bin/python
# SPDX-License-Identifier: GPL-2.0-or-later
# SPDX-FileCopyrightText: 2016 Renesas Electronics Corporation
import matplotlib.pyplot as plt
import struct
import sys
def usage(argv0):
print 'Usage: %s <histo.bin>' % argv0
def main(argv):
if len(argv) != 2:
usage(argv[0])
return 1
data = file(argv[1], 'rb').read()
if len(data) == (2 + 64) * 4 or len(data) == (2 + 256) * 4:
maxmin = struct.unpack('<I', data[0:4])
sums = struct.unpack('<I', data[4:8])
histo = struct.unpack('<%uI' % (len(data[8:]) / 4), data[8:])
num_bins = len(histo);
title = 'min %u max %u sum %u' % \
((maxmin[0] >> 0) & 0xff, (maxmin[0] >> 16) & 0xff, sums[0])
print 'pixels (%u)' % sum(histo)
plt.figure(figsize=(10, 10))
plt.xlim([0, num_bins])
plt.ylim([0, max(histo)])
plt.bar(range(num_bins), histo, color='r');
elif len(data) == (6 + 64 * 3) * 4:
maxmin = struct.unpack('<III', data[0:12])
sums = struct.unpack('<III', data[12:24])
histo = [struct.unpack('<I', data[24+i*4:24+i*4+4])[0] for i in xrange(len(data[24:])/4)]
num_bins = len(histo) / 3;
histo_r = histo[0:num_bins]
histo_g = histo[num_bins:2*num_bins]
histo_b = histo[num_bins*2:]
title = 'RGB min (%u,%u,%u) max (%u,%u,%u) sum (%u,%u,%u)' % \
((maxmin[0] >> 0) & 0xff, (maxmin[1] >> 0) & 0xff, (maxmin[2] >> 0) & 0xff,
(maxmin[0] >> 16) & 0xff, (maxmin[1] >> 16) & 0xff, (maxmin[2] >> 16) & 0xff,
sums[0], sums[1], sums[2])
print 'pixels RGB (%u,%u,%u)' % (sum(histo_r), sum(histo_g), sum(histo_b))
plt.figure(figsize=(10, 20))
plt.subplot(3, 1, 1)
plt.xlim([0, num_bins])
plt.ylim([0, max(histo_r)])
plt.bar(range(num_bins), histo_r, color='r');
plt.subplot(3, 1, 2)
plt.xlim([0, num_bins])
plt.ylim([0, max(histo_g)])
plt.bar(range(num_bins), histo_g, color='g');
plt.subplot(3, 1, 3)
plt.xlim([0, num_bins])
plt.ylim([0, max(histo_b)])
plt.bar(range(num_bins), histo_b, color='b');
else:
print 'Invalid histogram length %u' % len(data)
return 1
plt.suptitle(title)
plt.savefig(argv[1].replace('bin', 'png'), dpi=72)
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv))
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