#!/usr/bin/env python

# based on:
# /System/Library/Automator/Combine PDF Pages.action/Contents/Resources/join.py

from CoreFoundation import *
from Quartz.CoreGraphics import *

SRC = 'Unified_Storage_Systems_Architecture.pdf'
DST = '7310_architecture.pdf'
PAGES = (26, 27, 28)

srcURL = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, SRC, len(SRC), False)
srcDoc = CGPDFDocumentCreateWithURL(srcURL)

dstURL = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, DST, len(DST), False)
dstCtx = CGPDFContextCreateWithURL(dstURL, None, None)

try:
	for i in PAGES:
		page = CGPDFDocumentGetPage(srcDoc, i)
		mediaBox = CGPDFPageGetBoxRect(page, kCGPDFMediaBox)
		CGContextBeginPage(dstCtx, mediaBox)
		CGContextDrawPDFPage(dstCtx, page)
		CGContextEndPage(dstCtx)
finally:
	CGPDFContextClose(dstCtx)