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#!/usr/bin/env python
# SPDX-License-Identifier: GPL-2.0 */
# -*- coding: utf-8 -*-
from struct import unpack, pack
import sys
import getopt
class BMPFile:
def __init__(self, file_path, force_revers=0, force_swap=0):
self.file = open(file_path, "rb+")
# bmp head 14bit
self.bfType = unpack("<h", self.file.read(2))[0]
self.bfSize = unpack("<i", self.file.read(4))[0]
self.bfReserved1 = unpack("<h", self.file.read(2))[0]
self.bfReserved2 = unpack("<h", self.file.read(2))[0]
self.bfOffBits = unpack("<i", self.file.read(4))[0]
self.biSize = unpack("<i", self.file.read(4))[0]
self.biWidth = unpack("<i", self.file.read(4))[0]
self.biHeight = unpack("<i", self.file.read(4))[0]
self.biPlanes = unpack("<h", self.file.read(2))[0]
self.biBitCount = unpack("<h", self.file.read(2))[0]
# bmp parameter 40 bit normaally
self.biCompression = unpack("<i", self.file.read(4))[0]
self.biSizeImage = unpack("<i", self.file.read(4))[0]
self.biXPixelsPerMeter = unpack("<i", self.file.read(4))[0]
self.biYPixelsPerMeter = unpack("<i", self.file.read(4))[0]
self.biClrUsed = unpack("<i", self.file.read(4))[0]
self.biClrImportant = unpack("<i", self.file.read(4))[0]
self.head = []
self.color_map = []
self.bmp_data = []
self.bf_map = []
self.force_revers = force_revers
self.force_swap = force_swap
# some software change parameter size more than 40 bit
if self.biSize > 40:
self.read_other(self.biSize-40)
if self.biBitCount == 16 and self.biCompression == 3:
for i in range(4):
self.bf_map.append(
[unpack("<i", self.file.read(4))[0]]
)
if self.biBitCount == 24:
self.get_24bit_data()
elif self.biBitCount == 16:
if self.biCompression == 3:
self.bmp16bit_to_24bit_bf()
else:
self.bmp16bit_to_24bit()
elif self.biBitCount == 8:
# Not convert 8bit bmp logo to 24 bit
self.file.close()
return
else:
self.bmp32bit_to_24bit()
self.rb_swap = 0
if self.bfReserved1 != 8399 and self.biHeight > 0:
self.reverse_bmp_data()
print("reverse data at first time")
if self.force_revers:
self.reverse_bmp_data()
print("reverse data by force")
if self.force_swap:
self.rb_swap = 1
print("swap rb by force'")
if self.bfReserved1 == 8399:
self.file.close()
return
self.write_24bit(self.rb_swap)
self.file.close()
def read_other(self, n):
for i in range(n):
self.file.read(1)
def reverse_bmp_data(self):
self.bmp_data.reverse()
@staticmethod
def get_16bit_bgr_bf(pixel):
red = (pixel[1] & 0xf8) << 0
green = ((pixel[1] & 0x07) << 5) | ((pixel[0] & 0xe0) >> 3)
blue = ((pixel[0] & 0x1f) << 3)
new_pixel = [blue, green, red]
return new_pixel
def bmp32bit_to_24bit(self):
for height in range(abs(self.biHeight)):
bmp_data_row = []
# bmp file 4 align
count = 0
for width in range(self.biWidth):
bmp_data_row.append(
[unpack("<B", self.file.read(1))[0], unpack("<B", self.file.read(1))[0], unpack("<B", self.file.read(1))[0]])
self.file.read(1)
count = count + 4
while count % 4 != 0:
self.file.read(1)
count = count + 1
self.bmp_data.append(bmp_data_row)
def bmp16bit_to_24bit_bf(self):
self.get_16bit_data()
temp_data = self.bmp_data
self.bmp_data = []
for height in range(abs(self.biHeight)):
bmp_data_row = []
for width in range(self.biWidth):
bmp_data_row.append(
self.get_16bit_bgr_bf(temp_data[height][width])
)
self.bmp_data.append(bmp_data_row)
def bmp8bit_to_24bit_rle(self):
bmp_data_row = []
data_x = []
t_count = 0
loop = 1
while loop:
data1 = unpack("<B", self.file.read(1))[0]
if data1 > 0:
data2 = unpack("<B", self.file.read(1))[0]
for n in range(data1):
bmp_data_row.append(self.color_map[data2])
if data1 == 0:
data2 = unpack("<B", self.file.read(1))[0]
if data2 > 2:
data_count = data2
data_temp = unpack("<B", self.file.read(1))[0]
data_x.append(data_temp)
while data_temp != 0:
data_temp = unpack("<B", self.file.read(1))[0]
data_x.append(data_temp)
for m in range(data_count):
bmp_data_row.append(self.color_map[data_x[m]])
if data2 == 2:
print("data2 == 2")
if data2 == 0:
t_count += 1
self.bmp_data.append(bmp_data_row)
bmp_data_row = []
if data2 == 1:
print("encode over!")
loop = 0
def bmp8bit_to_24bit(self):
for height in range(abs(self.biHeight)):
bmp_data_row = []
count = 0
for width in range(self.biWidth):
bmp_data_row.append(
self.color_map[unpack("<B", self.file.read(1))[0]])
count = count + 1
while count % 4 != 0:
self.file.read(1)
count = count + 1
self.bmp_data.append(bmp_data_row)
@staticmethod
def get_16bit_bgr(pixel):
red = (pixel[1] & 0x7c) << 1
green = ((pixel[1] & 0x03) << 6) | ((pixel[0] & 0xe0) >> 2)
blue = ((pixel[0] & 0x1f) << 3)
new_pixel = [blue, green, red]
return new_pixel
def bmp16bit_to_24bit(self):
self.get_16bit_data()
temp_data = self.bmp_data
self.bmp_data = []
for height in range(abs(self.biHeight)):
bmp_data_row = []
for width in range(self.biWidth):
bmp_data_row.append(
self.get_16bit_bgr(temp_data[height][width])
)
self.bmp_data.append(bmp_data_row)
def get_head(self):
self.file.seek(0, 0)
for i in range(54):
self.head.append(unpack("<B", self.file.read(1))[0])
return self.head
def get_16bit_data(self):
for height in range(abs(self.biHeight)):
bmp_data_row = []
count = 0
for width in range(self.biWidth):
bmp_data_row.append(
[unpack("<B", self.file.read(1))[0], unpack("<B", self.file.read(1))[0]])
count = count + 2
while count % 4 != 0:
self.file.read(1)
count = count + 1
self.bmp_data.append(bmp_data_row)
def get_24bit_data(self):
for height in range(abs(self.biHeight)):
bmp_data_row = []
count = 0
for width in range(self.biWidth):
bmp_data_row.append(
[unpack("<B", self.file.read(1))[0], unpack("<B", self.file.read(1))[0], unpack("<B", self.file.read(1))[0]])
count = count + 3
while count % 4 != 0:
self.file.read(1)
count = count + 1
self.bmp_data.append(bmp_data_row)
def write_24bit(self,rb_swap):
self.file.seek(0, 0)
self.write_head_24bit()
self.write_data_24bit(rb_swap)
def write_head(self):
self.file.write(pack("<h", self.bfType))
self.file.write(pack("<i", self.bfSize))
self.file.write(pack("<h", self.bfReserved1))
self.file.write(pack("<h", self.bfReserved2))
self.file.write(pack("<i", self.bfOffBits)) # bfOffBits
self.file.write(pack("<i", self.biSize)) # biSize
self.file.write(pack("<i", self.biWidth))
self.file.write(pack("<i", self.biHeight))
self.file.write(pack("<h", self.biPlanes))
self.file.write(pack("<h", self.biBitCount)) # biBitCount
self.file.write(pack("<i", self.biCompression)) # biCompression
self.file.write(pack("<i", self.biSizeImage)) # biSizeImage
self.file.write(pack("<i", self.biXPixelsPerMeter)) # biXPixelsPerMeter
self.file.write(pack("<i", self.biYPixelsPerMeter)) # biYPixelsPerMeter
self.file.write(pack("<i", self.biClrUsed)) # biClrUsed
self.file.write(pack("<i", self.biClrImportant)) # biClrImportant try to mark whether is reversed
def write_head_24bit(self):
temp_bi_width = self.biWidth * 3
while temp_bi_width % 4 != 0:
temp_bi_width = temp_bi_width + 1
new_bf_size = temp_bi_width * abs(self.biHeight) + 54
self.file.write(pack("<h", self.bfType))
self.file.write(pack("<i", new_bf_size))
self.file.write(pack("<h", 8399)) # a mark for uboot dealing
self.file.write(pack("<h", self.bfReserved2))
self.file.write(pack("<i", 54)) # bfOffBits
self.file.write(pack("<i", 40)) # biSize
self.file.write(pack("<i", self.biWidth))
# force height to negative let logo show normal in windows
# the uboot code can deal with negative height
if self.biHeight < 0:
self.file.write(pack("<i", self.biHeight))
else:
self.file.write(pack("<i", self.biHeight * -1))
self.file.write(pack("<h", self.biPlanes))
self.file.write(pack("<h", 24)) # biBitCount
self.file.write(pack("<i", 0)) # biCompression
self.file.write(pack("<i", 0)) # biSizeImage
self.file.write(pack("<i", 0)) # biXPixelsPerMeter
self.file.write(pack("<i", 0)) # biYPixelsPerMeter
self.file.write(pack("<i", 0)) # biClrUsed
self.file.write(pack("<i", 0)) # biClrImportant try to mark whether is reversed
def write_data_24bit(self, rb_swap):
for hg in range(abs(self.biHeight)):
count = 0
for wd in range(self.biWidth):
if rb_swap:
self.file.write(pack("<B", self.bmp_data[hg][wd][2]))
self.file.write(pack("<B", self.bmp_data[hg][wd][1]))
self.file.write(pack("<B", self.bmp_data[hg][wd][0]))
else:
self.file.write(pack("<B", self.bmp_data[hg][wd][0]))
self.file.write(pack("<B", self.bmp_data[hg][wd][1]))
self.file.write(pack("<B", self.bmp_data[hg][wd][2]))
count = count + 3
while count % 4 != 0:
self.file.write(pack("<B", 0))
count = count + 1
if __name__ == "__main__":
swap = 0
revers = 0
par = len(sys.argv[1:])
if par == 1:
bmp = BMPFile(sys.argv[1])
elif par == 0:
print("This program is trying to convert different format of bmpfile to a same format"
"to make vop can handle bmpfile easily")
print("try such cmd to make it work python bmpconvert xxx/xxx.bmp")
else:
try:
opts, args = getopt.getopt(sys.argv[2:], "hrs", ["help", "reverse", "swap"])
for opt, arg in opts:
if opt in ('-h','--help'):
print("add -r option will force program to reverse data")
print("add -s option will force program to swap data of rb")
if opt in ("-r", "--reverse"):
revers = 1
if opt in ("-s", "--swap"):
swap = 1
bmp = BMPFile(sys.argv[1], revers, swap)
except getopt.GetoptError:
sys.exit(1)
|
