命令：logo_gen.py xxx.png
说明中表示用python和PIL(python Image Library)制作，PIL是另外下载安装的库，图片资源必须为png，且色深为8-bit的RGB或者RGBA格式。
生成的splash.img格式为文件头+BGR原始数据：文件头如上面结构体一样排列，BGR就是将原B,R通道数据交换，把这样的数据顺序存在另一个文件中改名为splash.img即可。
在这个脚本下还有个脚本使用说明：python ./logo_gen.py xxx.png，实际上看代码，如果不指定源png图片，会自动寻找logo.png。
文件内容
#===========================================================================# This script read the logo png and creates the logo.img# whenwhowhat, where, why# ------------------------------------------------------------------# -04 QRDinit# Environment requirement:#Python + PIL#PIL install:# (ubuntu) sudo apt-get install python-imaging# (windows) (/products/pil/)# limit:# the logo png file's format must be:#a Truecolour with alpha: each pixel consists of four samples,# only allow 8-bit depeths: red, green, blue, and alpha.#b Truecolour: each pixel consists of three samples,# only allow 8-bit depeths: red, green, and blue.# description:# struct logo_header {# unsigned char[8]; // "SPLASH!!"# unsigned width; // logo's width, little endian# unsigned height; // logo's height, little endian# unsigned char reserved[512-16];# };# the logo Image layout:# logo_header + BGR RAW Data#说明中表示用python和PIL(python Image Library)制作，PIL是另外下载安装的库，图片资源必须为png，且色深为8-bit的RGB或者RGBA格式。#生成的splash.img格式为文件头+BGR原始数据：文件头如上面结构体一样排列，BGR就是将原B,R通道数据交换，把这样的数据顺序存在另一个文件中改名为splash.img即可。#在这个脚本下还有个脚本使用说明：python ./logo_gen.py snapdragon.png，实际上看代码，如果不指定源png图片，会自动寻找logo.png。# ===========================================================================*/import sys,osimport structimport StringIOfrom PIL import Image## get headerdef GetImgHeader(size):SECTOR_SIZE_IN_BYTES = 512 # Header sizeheader = [0 for i in range(SECTOR_SIZE_IN_BYTES)]width, height = size# magicheader[0:7] = [ord('S'),ord('P'), ord('L'), ord('A'),ord('S'),ord('H'), ord('!'), ord('!')]# widthheader[8] = ( width & 0xFF)header[9] = ((width >> 8 ) & 0xFF)header[10]= ((width >> 16) & 0xFF)header[11]= ((width >> 24) & 0xFF)# heightheader[12]= ( height & 0xFF)header[13]= ((height >> 8) & 0xFF)header[14]= ((height >> 16) & 0xFF)header[15]= ((height >> 24) & 0xFF)output = StringIO.StringIO()for i in header:output.write(struct.pack("B", i))content = output.getvalue()output.close()# only need 512 bytesreturn content[:512]## get png raw data : BGR Interleaveddef CheckImage(mode):if mode == "RGB" or mode == "RGBA":returnprint "error: need RGB or RGBA format with 8 bit depths"sys.exit()def GetImageBody(img):color = (0, 0, 0)if img.mode == "RGB":img.load()r, g, b = img.split()if img.mode == "RGBA":background = Image.new("RGB", img.size, color)img.load()background.paste(img, mask=img.split()[3]) # 3 is the alpha channelr, g, b = background.split()return Image.merge("RGB",(b,g,r)).tobytes()## make a imagedef MakeLogoImage(logo, out):img = Image.open(logo)CheckImage(img.mode)file = open(out, "wb")file.write(GetImgHeader(img.size))file.write(GetImageBody(img))file.close()## miandef ShowUsage():print " usage: python logo_gen.py [logo.png]"def GetPNGFile():infile = "logo.png" #default file namenum = len(sys.argv)if num > 2:ShowUsage()sys.exit(); # error argif num == 2:infile = sys.argv[1]if os.access(infile, os.R_OK) != True:ShowUsage()sys.exit(); # error filereturn infileif __name__ == "__main__":MakeLogoImage(GetPNGFile(), "splash.img")
