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

LibreOffice 4.4.5.2 - Free, open-source...
LibreOffice is an office suite (word processor, spreadsheet, presentations, drawing tool) compatible with other major office suites. The Document Foundation is coordinating development and... Read more
Adobe Lightroom 6.1.1 - Import, develop,...
Adobe Lightroom is available as part of Adobe Creative Cloud for as little as $9.99/month bundled with Photoshop CC as part of the photography package. Lightroom 6 is also available for purchase as a... Read more
File Juicer 4.41 - Extract images, video...
File Juicer is a drag-and-drop can opener and data archaeologist. Its specialty is to find and extract images, video, audio, or text from files which are hard to open in other ways. It finds and... Read more
A Better Finder Rename 9.52 - File, phot...
A Better Finder Rename is the most complete renaming solution available on the market today. That's why, since 1996, tens of thousands of hobbyists, professionals and businesses depend on A Better... Read more
OmniFocus 2.2.3 - GTD task manager with...
OmniFocus helps you manage your tasks the way that you want, freeing you to focus your attention on the things that matter to you most. Capturing tasks and ideas is always a keyboard shortcut away in... Read more
TinkerTool 5.4 - Expanded preference set...
TinkerTool is an application that gives you access to additional preference settings Apple has built into Mac OS X. This allows to activate hidden features in the operating system and in some of the... Read more
Tinderbox 6.3.1 - Store and organize you...
Tinderbox is a personal content management assistant. It stores your notes, ideas, and plans. It can help you organize and understand them. And Tinderbox helps you share ideas through Web journals... Read more
Parallels Desktop 10.2.2 - Run Windows a...
Parallels Desktop is simply the world's bestselling, top-rated, and most trusted solution for running Windows applications on your Mac. With Parallels Desktop for Mac, you can seamlessly run both... Read more
Adobe Premiere Pro CC 2015 9.0.1 - Digit...
Premiere Pro CC 2015 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Premiere Pro customer). Premiere Pro CS6 is still available for... Read more
Adobe After Effects CC 2015 13.5.1 - Cre...
After Effects CC 2015 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous After Effects customer). After Effects CS6 is still available... Read more

Domino Drop (Games)
Domino Drop 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Domino Drop is a delightful new puzzle game with dominos and gravity!Learn how to play it in a minute, master it day by day.Your... | Read more »
OPERATION DRACULA (Games)
OPERATION DRACULA 1.0.1 Device: iOS Universal Category: Games Price: $5.99, Version: 1.0.1 (iTunes) Description: 25% off launch sale!!! 'Could prove to be one of the most accurate representations of the Japanese bullet hell shmup... | Read more »
Race The Sun (Games)
Race The Sun 1.01 Device: iOS iPhone Category: Games Price: $4.99, Version: 1.01 (iTunes) Description: You are a solar craft. The sun is your death timer. Hurtle towards the sunset at breakneck speed in a futile race against time.... | Read more »
Tap Delay (Music)
Tap Delay 1.0.0 Device: iOS Universal Category: Music Price: $4.99, Version: 1.0.0 (iTunes) Description: Back in the “old days”, producers and engineers created delay and echo effects using tape machines. Tap Delay combines the warm... | Read more »
This Week at 148Apps: July 20-24, 2015
July is Heating Up With 148Apps How do you know what apps are worth your time and money? Just look to the review team at 148Apps. We sort through the chaos and find the apps you're looking for. The ones we love become Editor’s Choice, standing out... | Read more »
Red Game Without A Great Name (Games)
Red Game Without A Great Name 1.0.3 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0.3 (iTunes) Description: The mechanical bird is flying through an unfriendly, Steampunk world. Help it avoid obstacles and deadly... | Read more »
Warhammer: Arcane Magic (Games)
Warhammer: Arcane Magic 1.0.2 Device: iOS Universal Category: Games Price: $9.99, Version: 1.0.2 (iTunes) Description: Engage in epic battles and tactical gameplay that challenge both novice and veteran in Warhammer: Arcane Magic, a... | Read more »
Mazes of Karradash (Games)
Mazes of Karradash 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: The city of Karradash is under attack: the monsters of the Shadow Realms are emerging from the depths.No adventurer is... | Read more »
Battle Golf is the Newest Game from the...
Wrassling was a pretty weird - and equally great - little wressling game. Now the developers, Folmer Kelly and Colin Lane, have turned their attention to a different sport: golfing. This is gonna be weird. [Read more] | Read more »
Qbert Rebooted has the App Store Going...
The weird little orange... whatever... is back, mostly thanks to that movie which shall remain nameless (you know the one). But anyway it's been "rebooted" and now you can play the fancy-looking Qbert Rebooted on iOS devices. [Read more] | Read more »

Price Scanner via MacPrices.net

12-inch MacBooks in stock for $20 off, save o...
Adorama has 12″ Retina MacBooks in stock for $20 off MSRP including free shipping plus NY & NJ sales tax only. For a limited time, Adorama will include a free Apple USB-C to USB Adapter, free 4-... Read more
College Student Deals: Additional $100 off Ma...
Take an additional $100 off all MacBooks and iMacs at Best Buy Online with their College Students Deals Savings, valid through August 8, 2015. Anyone with a valid .EDU email address can take... Read more
2015 13-inch 2.7GHz Retina MacBook Pro on sal...
B&H Photo has the new 2015 13″ 2.7GHz/128GB Retina MacBook Pro on sale today for $1199 including free shipping plus NY sales tax only. Their price is $100 off MSRP. Read more
2.8GHz Mac mini available for $988, includes...
Adorama has the 2.8GHz Mac mini available for $988, $11 off MSRP, including a free copy of Apple’s 3-Year AppleCare Protection Plan. Shipping is free, and Adorama charges sales tax in NY & NJ... Read more
Updated Mac Price Trackers
We’ve updated our Mac Price Trackers with the latest information on prices, bundles, and availability on systems from Apple’s authorized internet/catalog resellers: - 15″ MacBook Pros - 13″ MacBook... Read more
High-Precision Battery Fuel Gauge IC Extends...
Renesas Electronics Corporation has announced its new lithium-ion (Li-ion) battery fuel gauge IC, the RAJ240500, designed to extend battery life for connected mobile devices such as tablets, notebook... Read more
27-inch 3.3GHz 5K iMac on sale for $1799, $20...
B&H Photo has the 27″ 3.3GHz 5K iMac on sale for $1799 including free shipping plus NY tax only. Their price is $200 off MSRP, and it’s the lowest price available for this model from any Apple... Read more
Twelve South Free Dual Screen Backgrounds Co...
Twelve South has posted a second collection of travel Desktop photos, noting: For the Twelve South team, a vacation is never just a vacation. It’s a time to try out new prototypes on the road, visit... Read more
Apple Refurbished iMacs available for up to $...
The Apple Store has Apple Certified Refurbished iMacs available for up to $380 off the cost of new models. Apple’s one-year warranty is standard, and shipping is free: - 27″ 3.5GHz 5K iMac – $1949 $... Read more
Tablets: Why Microsoft’s Surface Is Soaring W...
In contrast to Apple’s record fiscal third quarter reported this week, Microsoft had a miserable latest quarter with its revenues falling by 5.1 percent, hammered by ongoing weak PC demand, and... Read more

Jobs Board

*Apple* Retail - Multiple Positions (US) - A...
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 (US) - A...
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 (US) - A...
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* Customer Experience (ACE) Leader - A...
…management to deliver on business objectives Training partner store staff on Apple products, services, and merchandising guidelines Coaching partner store staff on Read more
Project Manager - *Apple* Pay Security - Ap...
**Job Summary** The Apple Pay Security team is seeking a highly organized, results-driven Project Manager to drive the development of Apple Pay Security. If you are Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.