TweetFollow Us on Twitter

Winter 91 - PRINT HINTS WITH LUKE & ZZ

PRINT HINTS WITH LUKE & ZZ

ZZ speaks

Once upon a time, in an engineering department far, far away, the great implementors (GIs) ran across a problem with their Frankensteinian monster. They had designed and built a powerful beast. A beast that had traveled great distances into unknown territories, and that had cut many new paths in the hot lead jungle. Many spoke of the creation, and it had become well known and respected in many lands and platforms. But the complexity that only the great implementors had dared to conceive was being challenged by the great hackers of the land. Many of them had conquered the secrets of the beast, and shared the knowledge of the great implementors. Soon, even mortal hackers would be able to control the beast. This would not do. . .

The GIs traveled far to find the infamous "field workers." They had already given the GIs the gift of dynamic, incomprehensible data structures, and the GIs were hopeful that they could provide something more. They could not. . .

At last, on their return from the field, they ran across a court jester. Like all good jesters, he was trying hard to find some fun. He tried to get the GIs to play a game with him. He tried Monopoly, Pictionary, even checkers, but the GIs were not interested (he did notice a little glimmer when he mentioned thermonuclear war, but not enough to be important). As a last resort, he finally said, "Pick a number." Suddenly, the great gods of arbitration came down on the GIs like a 5-ton weight. "Pick a number!" one of them shouted. "It's beautiful!" laughed another one. And soon they were off to the lab to implement their new discovery.

This folks, is the not-based-on-a-true-story story of the constant named iPfMaxPgs. This constant is part of the Printing Manager, and limits the number of pages that can be spooled (that is, written to disk) in one print job. In the old days, when even engineers at Apple were using floppy drives, the Print Shop came to the conclusion that there should be a limit on the number of pages you could print in a single job. If not, the user could easily use up all the disk space on the boot disk, which at the time, led to other, even more interesting problems. The decision to limit the number of pages was quickly followed by a decision to use the court jester's advice and "pick a number." The magic number is 128, and is referenced by the constant iPfMaxPgs.

So now, you are printing your favorite report, all 130 pages of it, and just to annoy your neighbors, you're printing to your ImageWriter II in Best mode. You've placed the printer next to the window in the bathroom where the acoustics are especially outgoing, and the window is open for the extra cooling effect (at least, that's what you told the neighbors). As the head rips across the bottom of page 128 like nails across the chalkboard, you are suddenly greeted with a Printing Manager error code. Sure, your neighbors are happy, but you still have two pages to go. You frantically dig for that suicide prevention number (that your neighbors have obviously borrowed), but decide instead that printing more than 128 pages in one job would be a great way to get new neighbors.

To print jobs longer than 128 pages, you simply treat them like multiple jobs, printing each set of 128 pages just like the first set. To make this even simpler, it would be nice if there was one line of code that told you when to close the current document and open the new one. Welcome to the MOD squad (or the % Club for you C dudes).

The MOD instruction is very useful for tracking sets of things, like the number of pages in a print job. Most people that have implemented a Macintosh printing loop (you can spot them by the gray hair and growing forehead) use some kind of page loop.

The following code fragments will show the flow of control using the MOD operator. The parameters of the Toolbox routines have been omitted for simplicity.

Before you knew enough words to type 128-page documents, you used to have a print loop that figured out how many pages you had to print and then printed them one at a time.

This works well for bothering neighbors, but you'll never get any For Sale signs with this technique. To print jobs larger than 128 pages, you need to call PrOpenDoc/PrCloseDocwithin the FOR loop. Whenever you reach 128 pages, you need to call PrCloseDoc to close the current document, and then PrPicFile to despool the (now full) spool file. Once this is done, a new document is opened, and everything continues as before.

FOR pageIndex := firstPage TO kNumberOfPages - 1 DO
BEGIN
    (* If we are on page number 128, 
       we need to close and reopen the document *)
    IF (pageIndex - firstPage) MOD iPFMaxPgs = 0 THEN
    BEGIN
        (* Make sure there is a document open before
           calling PrCloseDoc! i.e. if this is the first
           page, don't call PrCloseDoc... *)
        IF pageIndex <> firstPage THEN 
        BEGIN
            PrCloseDoc(...);
            PrPicFile(...);
        END;
        (* Now open a fresh, 128 page spool file. *)
        PrOpenDoc(...);
    END;
    (* Call PrOpenPage/PrClosePage for each page of the document. *)
    PrOpenPage(...);
    PrintAPage(...);
    PrClosePage(...);
END;
(* Finally, close the document and despool the spool file.*)
PrCloseDoc(...);
PrPicFile(...);
.
.
.

Pretty straightforward, but you'd be surprised how many developers the great implementors have caught with this one. Using the above method, you can safely print large documents on any device, without having to worry about overflowing the spool file. As for your neighbors, you could always put a Pause/Continue button in your Printing Status dialog, but then, where's the fun in that?

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Civilization VI 1.0.6 - Next iteration o...
Sid Meier’s Civilization VI is the next entry in the popular Civilization franchise. Originally created by legendary game designer Sid Meier, Civilization is a strategy game in which you attempt to... Read more
Civilization VI 1.0.6 - Next iteration o...
Sid Meier’s Civilization VI is the next entry in the popular Civilization franchise. Originally created by legendary game designer Sid Meier, Civilization is a strategy game in which you attempt to... Read more
djay Pro 2.0.1 - Transform your Mac into...
djay Pro provides a complete toolkit for performing DJs. Its unique modern interface is built around a sophisticated integration with iTunes and Spotify, giving you instant access to millions of... Read more
Microsoft OneNote 15.41 - Free digital n...
OneNote is your very own digital notebook. With OneNote, you can capture that flash of genius, that moment of inspiration, or that list of errands that's too important to forget. Whether you're at... Read more
TechTool Pro 9.6 - Hard drive and system...
TechTool Pro has long been one of the foremost utilities for keeping your Mac running smoothly and efficiently. With the release of version 9, it has become more proficient than ever. TechTool... Read more
Apple iOS 11.2.1 - The latest version of...
iOS 11 sets a new standard for what is already the world’s most advanced mobile operating system. It makes iPhone better than before. It makes iPad more capable than ever. And now it opens up both to... Read more
Things 3.3 - Elegant personal task manag...
Things is a task management solution that helps to organize your tasks in an elegant and intuitive way. Things combines powerful features with simplicity through the use of tags and its intelligent... Read more
RapidWeaver 7.5.5 - Create template-base...
RapidWeaver is a next-generation Web design application to help you easily create professional-looking Web sites in minutes. No knowledge of complex code is required, RapidWeaver will take care of... Read more
Adobe Animate CC 2018 18.0.1.115 - Anima...
Animate CC 2018 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Flash Professional customer). Animate CC 2018 (was Flash CC) lets you... Read more
Postbox 5.0.22 - Powerful and flexible e...
Postbox is a new email application that helps you organize your work life and get stuff done. It has all the elegance and simplicity of Apple Mail, but with more power and flexibility to manage even... Read more

Latest Forum Discussions

See All

Why Guns of Boom will be big for mobile...
Earlier this week, Game Insight, the minds that brought you Guns of Boom, revealed plans for an esports mode in the popular FPS title, with big implications for the game's future. Guns of Boom has been quite popular for some time now, so it's... | Read more »
Rules of Survival guide - how to boost y...
It's not easy surviving in the "every-man-for-himself" world of Rules of Survival. You'll be facing off against many other players who might be more skilled than you, or are luckier than you. There are a lot of factors weighing against you. With... | Read more »
FEZ Pocket Edition (Games)
FEZ Pocket Edition 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: | Read more »
Amazing Katamari Damacy guide - beginner...
Amazing Katamari Damacy brings the bizarro world of the original games to mobile and shifts them into an endless format that's just as addictive as the PlayStation entries. Your goal is still to roll as much random stuff as you possibly can, though... | Read more »
Portal Knights guide - crafting tips and...
In Portal Knights, you're only as strong as the items you have at your disposal. This sandbox adventure is all about crafting and building up the next big thing. Whether you're an avid explorer or collector, crafting will likely play a large part... | Read more »
The best deals on the App Store this wee...
A new week means new discounts on the App Store. This week's deals run the gamut of action-adventure titles, puzzle games, and one of the best narrative adventure series out there. If you're looking to fill out your mobile gaming library on a... | Read more »
What you need to know about Animal Cross...
We hope you've been hard at work on collecting all of those holiday items in Animal Crossing: Pocket Camp, because you're about to get a whole new list of fun things to do as the game receives its first big update sometime soon. There are a lot of... | Read more »
Reigns: Her Majesty guide - how to use e...
Ruling a kingdom isn't easy--doubly so for a queen whose every decision is questioned by the other factions seeking a slice of power. Reigns: Her Majesty builds on the original game's swipey tactics, adding items that you can use to move the story... | Read more »
The best new games we played this week -...
Friday has crept up on us once again, so it's time to honor the best new games we've played over the past few days. This past week was a pretty exciting one, with the debut of lots of beautiful new indies and some familiar faces returning to the... | Read more »
Portal Knights guide- beginner tips and...
Portal Knights is finally making the jump to iOS and Android, and it's already climbing the ranks to become the next big MMO experience on mobile. This sprawling sandbox game will let you pursue any adventure you wish, whether you want to sling... | Read more »

Price Scanner via MacPrices.net

Beats Holiday sale at B&H, headphones and...
B&H Photo has Beats by Dr. Dre headphones, earphones, and speakers on sale for up to $80 off MSRP as part of their Holiday sale. Expedited shipping is free, and B&H charges sales tax to NY... Read more
Holiday sale: Apple resellers offer 2017 15″...
MacMall has 15″ MacBook Pros on sale for $220-$300 off MSRP, each including free shipping: – 15″ 2.8GHz MacBook Pro Space Gray (MPTR2LL/A): $2179, $220 off MSRP – 15″ 2.8GHz MacBook Pro Silver (... Read more
Holiday sale: Apple resellers offer 13″ MacBo...
B&H Photo has 13″ MacBook Pros on sale for up to $150 off MSRP. Shipping is free, and B&H charges sales tax for NY & NJ residents only: – 13-inch 2.3GHz/128GB Space Gray MacBook Pro (... Read more
Apple Watch Series 2, Certified Refurbished,...
Apple has Certified Refurbished Apple Watch Nike+ Series 2s, 42mm Space Gray Aluminum Case with Anthracite/Black Nike Sport Bands, available for $249 (38mm) or $279 (42mm). The 38mm model was out of... Read more
Apple offers Certified Refurbished 2016 12″ R...
Apple has Certified Refurbished 2016 12″ Retina MacBooks available starting at $949. Apple will include a standard one-year warranty with each MacBook, and shipping is free. The following... Read more
B&H drops price on 13″ 256GB MacBook Air...
B&H has the 13″ 1.8GHz/256GB Apple MacBook Air (MQD42LL/A) now on sale for $1079 including free shipping plus NY & NJ sales tax only. Their price is $120 off MSRP, and it’s the lowest price... Read more
Holiday sale: 9″ iPads starting at $299, take...
MacMall has 9″ WiFi iPads on sale for $30 off including free shipping: – 9″ 32GB WiFi iPad: $299 – 9″ 128GB WiFi iPad: $399 Read more
Green Monday deal: 15″ 2.8GHz MacBook Pro on...
B&H Photo has the 15″ 2.8GHz Space Gray MacBook Pro on sale for $250 off MSRP for today only as part of their Green Monday/Holiday sale. Shipping is free, and B&H charges sales tax for NY... Read more
Green Monday sale: B&H offers 12″ Apple i...
B&H Photo has 12″ iPad Pros on sale for up to $150 off MSRP as part of their Green Monday/Holiday sale. Shipping is free, and B&H charges sales tax in NY & NJ only: – 12″ 64GB WiFi iPad... Read more
Holiday deal: 21″ and 27″ Apple iMacs on sale...
MacMall has 2017 21″ and 27″ Apple iMacs on sale for up to $200 off MSRP. Shipping is free: – 21″ 2.3GHz iMac: $999 $100 off MSRP – 21″ 3.0GHz iMac: $1199 $100 off MSRP – 21″ 3.4GHz iMac: $1379 $120... Read more

Jobs Board

*Apple* Solutions Consultant - Apple (United...
# Apple Solutions Consultant Job Number: 113124408 Waterford, CT, Connecticut, United States Posted: 17-Oct-2017 Weekly Hours: 40.00 **Job Summary** Are you Read more
QA Automation Engineer, *Apple* Pay - Apple...
# QA Automation Engineer, Apple Pay Job Number: 113202642 Santa Clara Valley, California, United States Posted: 11-Dec-2017 Weekly Hours: 40.00 **Job Summary** At Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description:SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description:SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.