157 lines
4.8 KiB
Python
Executable File
157 lines
4.8 KiB
Python
Executable File
# Copyright (c) 2013, The Linux Foundation. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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# * Neither the name of The Linux Foundation nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#===========================================================================
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# This script read the logo png and creates the logo.img
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# when who what, where, why
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# -------- --- -------------------------------------------------------
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# 2013-04 QRD init
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# Environment requirement:
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# Python + PIL
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# PIL install:
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# (ubuntu) sudo apt-get install python-imaging
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# (windows) (http://www.pythonware.com/products/pil/)
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# limit:
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# the logo png file's format must be:
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# a Truecolour with alpha: each pixel consists of four samples,
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# only allow 8-bit depeths: red, green, blue, and alpha.
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# b Truecolour: each pixel consists of three samples,
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# only allow 8-bit depeths: red, green, and blue.
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# description:
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# struct logo_header {
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# unsigned char[8]; // "SPLASH!!"
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# unsigned width; // logo's width, little endian
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# unsigned height; // logo's height, little endian
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# unsigned char reserved[512-16];
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# };
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# the logo Image layout:
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# logo_header + BGR RAW Data
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# ===========================================================================*/
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import sys,os
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import struct
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import StringIO
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from PIL import Image
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## get header
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def GetImgHeader(size):
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SECTOR_SIZE_IN_BYTES = 512 # Header size
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header = [0 for i in range(SECTOR_SIZE_IN_BYTES)]
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width, height = size
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# magic
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header[0:7] = [ord('S'),ord('P'), ord('L'), ord('A'),
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ord('S'),ord('H'), ord('!'), ord('!')]
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# width
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header[8] = ( width & 0xFF)
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header[9] = ((width >> 8 ) & 0xFF)
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header[10]= ((width >> 16) & 0xFF)
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header[11]= ((width >> 24) & 0xFF)
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# height
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header[12]= ( height & 0xFF)
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header[13]= ((height >> 8) & 0xFF)
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header[14]= ((height >> 16) & 0xFF)
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header[15]= ((height >> 24) & 0xFF)
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output = StringIO.StringIO()
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for i in header:
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output.write(struct.pack("B", i))
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content = output.getvalue()
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output.close()
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# only need 512 bytes
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return content[:512]
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## get png raw data : BGR Interleaved
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def CheckImage(mode):
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if mode == "RGB" or mode == "RGBA":
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return
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print "error: need RGB or RGBA format with 8 bit depths"
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sys.exit()
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def GetImageBody(img):
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color = (0, 0, 0)
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if img.mode == "RGB":
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r, g, b = img.split()
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if img.mode == "RGBA":
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background = Image.new("RGB", img.size, color)
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img.load()
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background.paste(img, mask=img.split()[3]) # 3 is the alpha channel
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r, g, b = background.split()
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return Image.merge("RGB",(b,g,r)).tostring()
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## make a image
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def MakeLogoImage(logo, out):
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img = Image.open(logo)
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CheckImage(img.mode)
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file = open(out, "wb")
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file.write(GetImgHeader(img.size))
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file.write(GetImageBody(img))
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file.close()
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## mian
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def ShowUsage():
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print " usage: python logo_gen.py [logo.png]"
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def GetPNGFile():
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infile = "logo.png" #default file name
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num = len(sys.argv)
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if num > 2:
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ShowUsage()
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sys.exit(); # error arg
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if num == 2:
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infile = sys.argv[1]
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if os.access(infile, os.R_OK) != True:
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ShowUsage()
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sys.exit(); # error file
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return infile
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if __name__ == "__main__":
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MakeLogoImage(GetPNGFile(), "splash.img")
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