TweetFollow Us on Twitter

Autumn 91 - PRINT HINTS FROM LUKE & ZZ

PRINT HINTS FROM LUKE & ZZ

COPYMASK, COPYDEEPMASK, AND LASERWRITER DRIVER 7.0

PETE "LUKE" ALEXANDER and Zz

[IMAGE 041-042_Luke's_column_ht1.GIF]

Luke speaks

With the release of System 7 comes a new release of the LaserWriter driver, version 7.0. Yes, the great implementors (GIs) have once again created another version of this driver. This version supports TrueType fonts, it's 32-bit clean, it has the new PostScript file-saving capability, and it remembers the last setting of the Black & White and Color/Grayscale print buttons (HOORAY!!).

Along comes our hero, Dudley Developer. He's been using the new CopyMask and CopyDeepMask calls that are available in QuickDraw in System 7 and he's very excited about printing his new images with the LaserWriter driver. He assumes that since QuickDraw supports the new CopyMask and CopyDeepMask calls, the LaserWriter driver 7.0 will also support them.

Bad assumption. Our hero has not been keeping up with current events. He has not even read "QuickDraw's CopyBits Procedure: Better Than Ever in System 7.0" in Issue 6 ofdevelop . If he had, he would know that, like previous versions of the LaserWriter driver, LaserWriter driver 7.0 does not directly support the CopyMask and CopyDeepMask calls.

So, in his ignorance, our hero creates a few pictures with the new QuickDraw calls, and sends them off to the LaserWriter. Time goes by, paper comes out, but the picture doesn't look the same as it did on his monitor. It has lost some of the cool effects from CopyMask and CopyDeepMask.

Why, he wonders, won't LaserWriter driver 7.0 print his images with the same effects provided by the CopyMask and CopyDeepMask calls? What was Apple thinking when they created LaserWriter driver 7.0? How could they release a driver that doesn't support the new 32-bit QuickDraw calls? How do they expect him to print his new cool pictures created in System 7 with these calls?

To attempt to understand the problem, Dudley looks between the covers of the Adobe red book (a.k.a. PostScript Language Reference Manual by Adobe Systems). Even he knows transfer modes would be required to support the new calls--but alas, he doesn't find any information on them, because PostScript level 1 doesn't understand transfer modes. Unfortunately, the LaserWriter driver won't rewrite PostScript for you; it just merrily converts your QuickDraw calls into their equivalent PostScript call. The LaserWriter driver always uses the srcCopy transfer mode when it prints a pixel map, regardless of the mode used when the picture was created. (Why srcCopy? Because of the limitations of the color model and the lack of transfer mode support provided by PostScript level 1.)

Thereis a method that will allow Dudley to print the images he created, but as usual with printing, he'll need to do a little more work: he'll need to use GWorlds and PrGeneral. Since our hero is not familiar with using GWorlds, he decides to go back through his old issues ofdevelop , hoping for an article. Luckily, he finds just what he's looking for in Issue 1: "Realistic Color for Real-World Applications" and "Braving Offscreen Worlds." And the CD contains the sample code that uses GWorlds. So, after reading the articles and trying the code, Dudley is all set to create an off-screen world to hold his image. He realizes that to get the best print quality, he'll need to make the GWorld bigger than the picture on the screen. The GWorld should be the size of the grafPort returned by the application's call to PrOpenDoc, at the printer's resolution. Dudley knows he needs a device- independent method to acquire this information, and he knows he can get it by using PrGeneral's GetRslData opcode. And even better still, he remembers an article about using PrGeneral from Issue 3 of develop . The article was titled "Meet PrGeneral," and it contained complete sample code. Yippee! After using the GetRslData opcode to determine the resolutions supported by the currently selected printer, he uses the SetRsl opcode to set the printer to the resolution he wants. When his application calls PrOpenDoc, the printer driver will return a grafPort that's sized correctly for the resolution he chose.

Next, Dudley creates the correctly sized off-screen world and draws his image using CopyMask or CopyDeepMask. He just needs to remember that since the CopyMask and CopyDeepMask calls are not saved in pictures, he needs to make the calls directly into his off-screen world (not relying on DrawPicture). So, when he's ready to print his image, Dudley uses CopyBits to copy it from his GWorld into the printer's grafPort with srcCopy. That's it; his totally cool image has been printed in living color (or anemic gray scales, if he's printing to the LaserWriter).

This wasn't so bad, but our hero is wondering--when will the GIs make this easier? When will all of this incompatibility between QuickDraw and the LaserWriter driver improve? That's a really good question. The GIs tell me things will probably not improve until the new printing architecture is released. In the meantime, you've got this way around the problem, and at least it isn't too ugly!


REFERENCES

  • "QuickDraw's CopyBits Procedure: Better Than Ever in System 7.0," develop Issue 6, Spring 1991.
  • "Meet PrGeneral, the Trap That Makes the Most of the Printing Manager" develop Issue 3, July 1990.
  • "Realistic Color for Real-World Applications," develop Issue 1, January 1990.
  • "Braving Offscreen Worlds," develop Issue 1, January 1990.
  • Inside Macintosh , Volume V, Color Manager chapter, Addison-Wesley, 1988.

PETE "LUKE" ALEXANDER After taking almost a year to check out Ford Explorers in parking lots and dealerships, Luke has, in a surprise move, actually purchased one of his own. At SIGGRAPH in Las Vegas he ran into some Ford engineers; they were surprised, but not seriously hurt. They asked increduously, "Have you driven a Ford lately?" Luke left wondering what kind of inside information they had. He knew for sure, though, that the animation was his favorite part of the show-- which figures, since since he's so used to working with Zz, our resident cartoon character. Not surprisingly, the Las Vegas show he talked about the most had little to do with computers! He also enjoys the show at Gordon Biersch, a local brew pub known for its good beer and yuppie clientele. Luke says he goes there to see how yuppie scum lives, but every once in a while we think he already knows.*

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Civilization VI 1.0.1 - 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
Chromium 55.0.2883.75 - Fast and stable...
Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. Version 55.0.2883.75: Security fixes: High CVE-2016... Read more
Google Chrome 55.0.2883.75 - Modern and...
Google Chrome is a Web browser by Google, created to be a modern platform for Web pages and applications. It utilizes very fast loading of Web pages and has a V8 engine, which is a custom built... Read more
VirtualBox 5.1.10 - x86 virtualization s...
VirtualBox is a family of powerful x86 virtualization products for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers... Read more
Pixa 1.1.9 - Quickly and easily organize...
Pixa is an image-organizing application. The new app functions well, is easy to use, and helps people organize their images quickly and easily on their computers. For those who prefer not to use the... Read more
VirtualBox 5.1.10 - x86 virtualization s...
VirtualBox is a family of powerful x86 virtualization products for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers... Read more
Pixa 1.1.9 - Quickly and easily organize...
Pixa is an image-organizing application. The new app functions well, is easy to use, and helps people organize their images quickly and easily on their computers. For those who prefer not to use the... Read more
Civilization VI 1.0.1 - 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
Google Chrome 55.0.2883.75 - Modern and...
Google Chrome is a Web browser by Google, created to be a modern platform for Web pages and applications. It utilizes very fast loading of Web pages and has a V8 engine, which is a custom built... Read more
Chromium 55.0.2883.75 - Fast and stable...
Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. Version 55.0.2883.75: Security fixes: High CVE-2016... Read more

Latest Forum Discussions

See All

Amateur Surgeon 4 Guide: Become the worl...
It's time to wield your trusty pizza cutter again, as Amateur Surgeon has returned with a whole fresh set of challenges (and some old, familiar ones, too). Starting anew isn't easy, especially when all you have at your disposal is a lighter, the... | Read more »
Le Parker: Sous Chef Extraordinaire (Ga...
Le Parker: Sous Chef Extraordinaire 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: | Read more »
Telltale Games really is working on a Gu...
Telltale Games' next episodic adventure is indeed Guardians of the Galaxy. A document tied to the voice actors strike suggested that the project was in the work, but now we have direct confirmation following an announcement at the Game Awards that... | Read more »
Amateur Surgeon returns to iOS and Andro...
Amateur Surgeon and its two sequels disappeared from the App Store some time and it was sad days for all. But now, just in time for the holidays, the Adult Swim favorite makes its joyous return in the shape of Amateur Surgeon 4, a remake with... | Read more »
The best board games on mobile
Sometimes you need to ditch all of the high speed, high action games in favor of something a little more traditional. If you don't feel like parting ways from your mobile device, though, there are still plenty of ways to get that old-school fix.... | Read more »
The best Facebook Messenger Instant Game...
Facebook's new Instant Games is now here, meaning you can play games with your friends directly via Facebook. It's a fun new way to connect with friends, of course, but it's also proving to be a solid gaming experience in its own right, with a... | Read more »
You can now play game's on Facebook...
Facebook launched its new Instant Games platform in an exciting new attempt to engage its user base. As a result, you can now play a number of different games directly through Facebook Messenger. All of these games run with HTML5, meaning you play... | Read more »
Apollo Justice Ace Attorney (Games)
Apollo Justice Ace Attorney 1.00.00 Device: iOS Universal Category: Games Price: $.99, Version: 1.00.00 (iTunes) Description: Court Is Back In Session Star as rookie defense attorney, Apollo Justice, as he visits crime scenes,... | Read more »
KORG iWAVESTATION (Music)
KORG iWAVESTATION 1.0 Device: iOS Universal Category: Music Price: $19.99, Version: 1.0 (iTunes) Description: A revolutionary new world of sound.The Wave Sequence Synthesizer for iPad - KORG iWAVESTATION | Read more »
Don't Grind Guide: Tips for becomin...
Don’t Grind is a surprising, derpy little one touch game with fun hand-drawn graphics. The goal is simple -- get the high score without being chopped to bits. That can be tough when you’re not used to the game, and that’s compounded by the fact... | Read more »

Price Scanner via MacPrices.net

13-inch Silver Touch Bar MacBook Pro in stock...
Amazon has the new 2016 13″ 2.9GHz/256GB Silver Touch Bar MacBook Pro (MLVP2LL/A) in stock today and on sale for $1749 including free shipping. That’s $50 off MSRP, and it’s the lowest price... Read more
Parallels Toolbox 1.3 for Mac Offers 25 Singl...
Parallels has launched Parallels Toolbox 1.3 for Mac, an upgrade that adds five new utilities to the stand-alone application which was released in August and is available exclusively online at http... Read more
OWC Mercury Elite Pro Dual mini Ultra-Portabl...
OWC has introduced the new OWC Mercury Elite Pro Dual mini, a powerful yet ultra-portable dual-drive RAID solution. The new Mercury Elite Pro Dual mini packs phenomenal performance into a small... Read more
Clearance 13-inch Retina MacBook Pros availab...
B&H Photo has clearance 2015 13″ Retina Apple MacBook Pros available for up to $200 off original MSRP. Shipping is free, and B&H charges NY tax only: - 13″ 2.7GHz/128GB Retina MacBook Pro: $... Read more
Roundup of 2016 13-inch 2.0GHz MacBook Pro sa...
B&H has the non-Touch Bar 13″ MacBook Pros in stock today for $50-$100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.0GHz MacBook Pro Space Gray (MLL42LL/A): $1449 $... Read more
New 13-inch 2.0GHz Space Gray MacBook Pro in...
Adorama has the new 13″ 2.0GHz Space Gray MacBook Pro (non-Touch Bar, MLL42LL/A) in stock for $1499 including a free 3-year AppleCare Protection Plan. Shipping is free, and Adorama charges sales tax... Read more
Finnair Adopts iOS Enterprise iPad Apps from...
Finnair and IBM have announced a first-of-its-kind agreement to utilize iOS enterprise apps from IBM to support the airline’s overall digital transformation. Finnair is focused on Asia-Europe traffic... Read more
Tech21 Launches Evo Go iPhone 7 Case Availabl...
Tech21 has announced the launch of the Evo Go case for Apple iPhone 7 and iPhone 7 Plus, exclusively at T-Mobile. Available online and at participating T-Mobile stores nationwide, Evo Go cases start... Read more
Apple Turns (RED) with More Ways to Join the...
In recognition of World AIDS Day, Apple is offering more ways than ever for customers to join (RED) in its mission to create an AIDS-free generation. Apple is the worlds largest corporate contributor... Read more
Deals on new 15-inch Touch Bar MacBook Pros,...
B&H Photo has new 2016 Apple 15″ Touch Bar MacBook Pro models in stock today with some available for $50 off MSRP, each including free shipping plus NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more

Jobs Board

*Apple* Brand Ambassador (Macy's) - The...
…(T-ROC), is proud of its unprecedented relationship with our partner and client, APPLE ,in bringing amazing" APPLE ADVOCATES"to "non" Apple store locations. Read more
US- *Apple* Store Leader Program - Apple (Un...
…Summary Learn and grow as you explore the art of leadership at the Apple Store. You'll master our retail business inside and out through training, hands-on Read more
*Apple* Retail - Multiple Positions- White P...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Automotive Detailer - *Apple* Used Autos -...
We are currently conductinginterviews and will be accepting applications for a part-time detailer. Apple Used Autos is a great place to work andstart a career. We 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
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.