TweetFollow Us on Twitter

Draw Picts
Volume Number:3
Issue Number:9
Column Tag:Basic Forum

Draw Picts from Basic

By Steven Leach, Chemical Engineer, Santa Clara, CA

Create PICT Files for MacDraw™ using MS Basic

This a solution to a problem that I was having when I was writing a rather complex figure in BASIC and wanted to save my very valuable work, but wouldn’t or couldn’t use the clipboard, or scrapbook. It seemed to me that the names for the BASIC pictures and the PICT file of the scrapbook seemed awful close so I thought why not bypass the scrapbook altogether ? My first step was to get the format for the MacDraw™ files. I located this on Compuserve in Tech Note 27. But beware there appears to be an error in the wording of this document for it states “If your application is going to create or modify information that you want to make available to MacDraw, you will want to create a data file in the PICT format.” The tech note goes on to explain the first 512 byte header, of which the first 4 bytes is supposed to be “DRWG”, or “PICT”, and if the next two bytes are not “MD” then the rest of the header can be zero bytes (chr$(0)). Well I have news for you this just does not work , the MacDraw™ page comes out blank.

However on examining the PICT files created by several programs like SuperPaint, and Cricket Draw I ascertained that the entire 512 byte header should be zeroed. Walah! my file is read properly. Now what about complex pictures that may be stored in your program as several picture strings. Well here we must concatonate them into a single picture string in order to get the file to be read properly, as is done in the short sample program presented in Listing 1.

This program will work with any MS Basic 2.0 or greater, but if you check, the line segments that make up the sine wave are individual objects in MacDraw™. This is fine for some cases but some of the items I wanted to appear as polygons, or grouped objects. The solution is available in the CLR libraries that are provided in MS Basic 3.0. If you wish to have a polygon in the PICT file, simply create one using the libraries. This adjustment is shown in Listing 2 for the sine wave picture that is later labeled as PICT2$. I also set the creator of the file to be MacDraw™.

I’m in heaven; I can save my pictures for all posterity. Wait what happened to my picture it’s the same and yet different. As usual there are some sobering quirks that you need to know about before you start celebrating. These quirks show up in version 1.9, I have not had a chance to use the version 1.95 that is being released now. The quirks are:

1) Any patterns that are used to draw lines are lost, the lines are solid lines in MacDraw.

2) As you guessed there is the usual problem with the fonts that are presented in MacDraw™.

3) Polygons saved to the PICT file as polygons can never be ungrouped, but they have all of the nice properties that polygons have, they can be smoothed and reshaped.

4) If you use an uneven pen , i.e. when the x and y dimensions of the pen are different; MacDraw will even the line out using the largest size. An example of this is given in listing 1&2 where the rectangle is framed with a pen that is (3,1). When you view the MacDraw picture you can see that the rectangle has a 3 pixel wide line on all sides.

Ok we can create MacDraw PICT files, is it possible to go the other way ? You bet. As a matter of fact it’s easy as long as we restrict the MacDraw picture to relatively simple things. This is required because the string variables that are used to store the pictures in BASIC are limited to 32767 characters. A BASIC program that is quite general is shown in listing 3.

This opens up the possibility of drawing anything in MacDraw and then reading it into BASIC and using it as you wish, perhaps a template for a complex user interface screen, or saving the picture as a resource to be used in your compiled program. It is possible to create dialogs with pictures in them to really wow those “C” programmers who consider BASIC a “toy” language.

Fig. 1 Draw PICT created from Basic

{1}
REM LISTING 1
REM THIS PROGRAM IS USABLE IN ALL MICROSOFT BASIC’S 
 VERSION 2.0 OR REM GREATER
REM try to create a macdraw PICT file
REM Tech Note # 27 specifies the PICT file structure 
 that is expected by MacDraw

    DIM Grey%(3)
    RESTORE PatternData
    FOR j% = 0 TO 3 : READ Grey%(j%) : NEXT

    PatternData:
        DATA -21931,-21931,-21931,-21931

REM define some objects that will be used for this       demonstration
REM read in the data that define the rectangle and 
 circle

DIM rect%(3),aCircle%(3)
RESTORE ObjectData
  READ rect%(0)
  READ rect%(1)
  READ rect%(2)
  READ rect%(3)
  READ aCircle%(0)
  READ aCircle%(1)
  READ aCircle%(2)
  READ aCircle%(3)

    ObjectData:
      DATA 10,10,110,150,100,100,200,200
      
     X.Offset = 0        
‘offset to be used in saving the picture in MacDraw
     Y.Offset = 0        
‘ if offsets not zero picture will have an upper 
‘ right corner at the location (X.Offset,Y.Offset)
  
    REM record first picture with pen on 
    PICTURE ON
     CALL SHOWPEN
     CALL PENSIZE(3,1)
     CALL FRAMERECT(VARPTR(rect%(0)))
     CALL PENNORMAL
     CALL PENPAT(VARPTR(Grey%(0)))
     CALL PAINTOVAL(VARPTR(aCircle%(0)))
     CALL PENSIZE(3,3)
     FOR indx% = 0 TO 3 : aCircle%(indx%) = aCircle%(indx%) + 50 : NEXT
         
     CALL FRAMEOVAL(VARPTR(aCircle%(0)))
     CALL PENNORMAL  
     CALL MOVETO  (10,10)
     CALL LINETO (100,200)
         
    PICTURE OFF
    pict1$ = PICTURE$
    
    REM now start the second picture
    PICTURE ON
        CALL MOVETO(100,100)
        FOR indx% = 1 TO 20
            CALL LINE(indx%,10*SIN(indx%))
        NEXT
    PICTURE OFF
    pict2$ = PICTURE$

REM we must now group all of the separate pictures as a REM single picture 
before they can be outputted to TRM the PICT file

    CALL HIDEPEN
    PICTURE ON
        PICTURE (X.Offset,Y.Offset), pict1$
‘use any valid offset you wish
        PICTURE (X.Offset,Y.Offset), pict2$
‘use same offset to get relationship right
    PICTURE OFF
    Pict$ = PICTURE$

    File.Pict$ = FILES$(0,”Name for this Picture ?”)
‘get the name of the file
    IF LEN(File.Pict$) <  5 THEN END
‘if no file name then quit

OPEN File.Pict$ FOR OUTPUT AS #1
FOR indx% = 1 TO 512 
 PRINT  #1,CHR$(0); 
 NEXT    ‘print out the header for the PICT file

PRINT  #1,Pict$;   ‘ Print out the picture to the file
CLOSE #1
NAME File.Pict$ AS File.Pict$,”PICT”     
‘type the file as PICT so can open from inside MacDraw™
{2}
REM This is listing 2 and is usable in MS BASIC 3.0 or greater
REM create a macdraw PICT file
REM Tech Note # 27 specifies the PICT file structure that is expected 
by MacDraw

LIBRARY “MSTools”

    DIM Grey%(3)
    RESTORE PatternData
    FOR j% = 0 TO 3 : READ Grey%(j%) : NEXT

    PatternData:
        DATA -21931,-21931,-21931,-21931

REM define some objects that will be used for this       demonstration
REM read in the data that define the rectangle and 
 circle

DIM rect%(3),aCircle%(3)
RESTORE ObjectData
  READ rect%(0)
  READ rect%(1)
  READ rect%(2)
  READ rect%(3)
  READ aCircle%(0)
  READ aCircle%(1)
  READ aCircle%(2)
  READ aCircle%(3)

    ObjectData:
      DATA 10,10,110,150,100,100,200,200
      
     X.Offset = 0        
‘offset to be used in saving the picture in MacDraw
     Y.Offset = 0        
‘ if offsets are not zero the picture will have an 
 upper right corner at that location
  
    REM record first picture with pen on 
     PICTURE ON
     CALL SHOWPEN
         CALL PENSIZE(3,1)
         CALL FRAMERECT(VARPTR(rect%(0)))
         CALL PENNORMAL
         
         CALL PENPAT(VARPTR(Grey%(0)))
         CALL PAINTOVAL(VARPTR(aCircle%(0)))

        CALL PENSIZE(3,3)
         FOR indx% = 0 TO 3 : aCircle%(indx%) = aCircle%(indx%) + 50 
: NEXT
         
         CALL FRAMEOVAL(VARPTR(aCircle%(0)))
         CALL PENNORMAL
         
         CALL MOVETO  (10,10)
         CALL LINETO (100,200)
         
    PICTURE OFF
    pict1$ = PICTURE$
    
    REM now start the second picture as polygon
    PGon! = 0
    openPGon PGon!
        CALL MOVETO(100,100)
        FOR indx% = 1 TO 20
            CALL LINE(indx%,10*SIN(indx%))
        NEXT
    CLOSEPGon
    
    PICTURE ON
    FramePgon PGon!
    PICTURE OFF
    pict2$ = PICTURE$

REM we must group all of the separate pictures as a 
 single picture
REM before they can be outputted to the MacDraw™ PICT 
 file
    CALL HIDEPEN
    PICTURE ON
        PICTURE (X.Offset,Y.Offset), pict1$
‘use any valid offset you wish
        PICTURE (X.Offset,Y.Offset), pict2$
‘use same offset to get relationship right
    PICTURE OFF
    Pict$ = PICTURE$

    File.Pict$ = FILES$(0,”Name for this Picture ?”)  ‘get the name of 
the file
    IF LEN(File.Pict$) <  5 THEN END
‘if no file name then quit

OPEN File.Pict$ FOR OUTPUT AS #1
FOR indx% = 1 TO 512     
 ‘print out the header for the PICT file
    PRINT  #1,CHR$(0); 
 ‘ note use of ; to prevent chr$(13)
NEXT 
PRINT  #1,Pict$;
‘ Print out the picture to the file
CLOSE #1
NAME File.Pict$ AS File.Pict$,”PICT”
 ‘type the file as PICT so can open  ‘from inside MacDraw™
Setcreate File.Pict$ , “MDRW”
{3}
‘ listing 3  
‘ This small routine reads MacDraw PICT FILES AND 
‘ displays the PICTURE

    
    File.Pict$ = FILES$(1,”PICT”)
 ‘Get the FileName
    IF LEN(File.Pict$) < 5 THEN END
 ‘if no file name then quit

    OPEN File.Pict$ FOR INPUT AS #1
 ‘ open the file for input
    FOR indx% = 1 TO 512   
 ‘read the the first 512 byte header
        tmp$ = INPUT$(1,#1) 
    NEXT       
    PICT$ = INPUT$(LOF(1)-512,#1)    
 ‘ read the rest of the file into a string
    CLOSE #1
 ‘  close the file
    CLS
 ‘ clear the screen and display the picture
    PICTURE , PICT$
 

Community Search:
MacTech Search:

Software Updates via MacUpdate

WhiteCap 6.6 - Visual plug-in for iTunes...
WhiteCap is a sleek and sophisticated music visualizer and screensaver that features futuristic, wireframe mesh visuals with dynamic backgrounds and colors. WhiteCap contains thousands of visual... Read more
VOX 2.8.14 - Music player that supports...
VOX just sounds better! The beauty is in its simplicity, yet behind the minimal exterior lies a powerful music player with a ton of features and support for all audio formats you should ever need.... Read more
Paparazzi! 1.0b2 - Make user-defined siz...
Paparazzi! is a small utility for OS X that makes screenshots of webpages. This very simple tool takes screenshots of websites which do not fit on one screen. You specify the desired width, minimal... Read more
Carbon Copy Cloner 4.1.13 - Easy-to-use...
Carbon Copy Cloner backups are better than ordinary backups. Suppose the unthinkable happens while you're under deadline to finish a project: your Mac is unresponsive and all you hear is an ominous,... Read more
TrailRunner 3.8.832 - Route planning for...
TrailRunner is the perfect companion for runners, bikers, hikers, and all people wandering under the sky. Plan routes on a geographical map. Import GPS or workout recordings and journalize your... Read more
VueScan 9.5.65 - Scanner software with a...
VueScan is a scanning program that works with most high-quality flatbed and film scanners to produce scans that have excellent color fidelity and color balance. VueScan is easy to use, and has... Read more
Adobe Illustrator CC 2017 21.0.2 - Profe...
Illustrator CC 2017 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Illustrator customer). Adobe Illustrator CC 2017 is the industry... Read more
iDefrag 5.1.7 - Disk defragmentation and...
iDefrag helps defragment and optimize your disk for improved performance. Features include: Supports HFS and HFS+ (Mac OS Extended). Supports case sensitive and journaled filesystems. Supports... Read more
Quicken 4.4.2 - Complete personal financ...
Quicken makes managing your money easier than ever. Whether paying bills, upgrading from Windows, enjoying more reliable downloads, or getting expert product help, Quicken's new and improved features... Read more
iDefrag 5.1.7 - Disk defragmentation and...
iDefrag helps defragment and optimize your disk for improved performance. Features include: Supports HFS and HFS+ (Mac OS Extended). Supports case sensitive and journaled filesystems. Supports... Read more

5 dastardly difficult roguelikes like th...
Edmund McMillen's popular roguelike creation The Binding of Isaac: Rebirth has finally crawled onto mobile devices. It's a grotesque dual-stick shooter that tosses you into an endless, procedurally generated basement as you, the pitiable Isaac,... | Read more »
Last week on PocketGamer
Welcome to a weekly feature looking back on the past seven days of coverage on our sister website, PocketGamer. It’s taken a while for 2017 to really get going, at least when it comes to the world of portable gaming. Thank goodness, then, for... | Read more »
ROME: Total War - Barbarian Invasion set...
To the delight of mobile strategy fans, Feral Interactive released ROME: Total War just a few months ago. Now the game's expansion, Barbarian Invasion is marching onto iPads as a standalone release. [Read more] | Read more »
Yuri (Games)
Yuri 1.0 Device: iOS iPhone Category: Games Price: $3.99, Version: 1.0 (iTunes) Description: It's night. Yuri opens his eyes. He wakes up in a strange forest.The small, courageous explorer rides on his bed on casters in this... | Read more »
Space schmup Xenoraid launches on the Ap...
10Tons Xenoraid is out today on the App Store, bringing some high-speed space action to your mobile gadgets just in time for the weekend. The company's last premium title, another sci-fi game titled Neon Chrome, did quite well for itself, so... | Read more »
Star Wars: Force Arena Beginner's G...
Star Wars: Force Arena joined the populous ranks of Star Wars games on mobile today. It's a two-lane MOBA starring many familiar faces from George Lucas's famed sci-fi franchise. As with most games of this nature, Force Arena can be a little obtuse... | Read more »
Mysterium: The Board Game (Games)
Mysterium: The Board Game 1.0 Device: iOS Universal Category: Games Price: $6.99, Version: 1.0 (iTunes) Description: The official adaptation of the famous board game Mysterium! | Read more »
Sonny (Games)
Sonny 1.0.4 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0.4 (iTunes) Description: Reimagined for iOS, cult-hit RPG Sonny brings challenging turn-based combat that requires strategy and mastery of each new skill to... | Read more »
Towaga (Games)
Towaga 1.0 Device: iOS iPhone Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: "It has been foretold that a masked being would stand atop the legendary Towaga Temple, dwelling among shadows to fulfil The Black Moon... | Read more »
Bubble Witch 3 Saga Guide: How to get th...
King's bringing its fairytale bubble-popping puzzler back for its 3rd outing in Bubble Witch 3 Saga. If you're familiar with the series, not much has changed here on the surface level, though you'll likely be pleased with the improvements. If you'... | Read more »

Price Scanner via MacPrices.net

New 2016 13-inch MacBook Pros on sale for up...
B&H Photo has the new 2016 13″ MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.9GHz/512GB Touch Bar MacBook Pro... Read more
New 15-inch Touch Bar MacBook Pros in stock a...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more
Opera Announces Neon Concept Browser For Mac
Opera is inviting users to get a glimpse of what Opera for computers could become with its Opera Neon browser concept. Each Opera Neon feature is described as “an alternate reality” for the Opera... Read more
Tellini Releases TabView 3.0 Missing Tool fo...
Tellini has announced the release of TabView 3.0. TabView has been the first macOS viewer for PowerTab tablatures. PowerTab is a well-known and widely adopted tablature editor for Windows systems and... Read more
13-inch 1.6GHz/128GB MacBook Air on sale for...
Overstock.com has the 1.6GHz/128GB 13″ MacBook Air on sale for $130 off MSRP including free shipping: - 13″ 1.6GHz/128GB MacBook Air (MMGF2LL/A): $869.99 $130 off MSRP Their price is the lowest... Read more
12-inch 32GB Space Gray iPad Pro on sale for...
B&H Photo has 12″ Space Gray 32GB WiFi Apple iPad Pros on sale for $55 off MSRP including free shipping. B&H charges sales tax in NY only: - 12″ Space Gray 32GB WiFi iPad Pro: $744.44 $55 off... Read more
9-inch 32GB Space Gray iPad Pro on sale for $...
B&H Photo has the 9.7″ 32GB Space Gray Apple iPad Pro on sale for $549 for a limited time. Shipping is free, and B&H charges NY sales tax only. Read more
Apple iMacs on sale for up to $120 off MSRP,...
B&H Photo has 21″ and 27″ Apple iMacs on sale for up to $120 off MSRP, each including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2199 $100 off MSRP - 27″ 3.2GHz/1TB Fusion iMac... Read more
Apple refurbished Apple TVs available for up...
Apple has Certified Refurbished 32GB and 64GB Apple TVs available for up to $30 off the cost of new models. Apple’s standard one-year warranty is included with each model, and shipping is free: -... Read more
1.4GHz Mac mini, refurbished, available for $...
The Apple Store has Apple Certified Refurbished 1.4GHz Mac minis available for $419. Apple’s one-year warranty is included, and shipping is free. Their price is $80 off MSRP, and it’s the lowest... Read more

Jobs Board

*Apple* Premier Retailer - Service Technicia...
DescriptionSimply Mac is the largest premier retailer for Apple products and solutions. At Simply Mac we are all Apple , all the time. Same products. Same prices. Read more
*Apple* Premier Retailer - Service Technicia...
DescriptionSimply Mac is the largest premier retailer for Apple products and solutions. At Simply Mac we are all Apple , all the time. Same products. Same prices. Read more
*Apple* Premier Retailer - Service Manager -...
DescriptionSimply Mac is the largest premier retailer for Apple products and solutions. At Simply Mac we are all Apple , all the time. Same products. Same prices. Read more
*Apple* Retail - Multiple Positions- Crows N...
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* & PC Desktop Support Technician...
Apple & PC Desktop Support Technician job in Los Angeles, CA Introduction: We have immediate job openings for several Desktop Support Technicians with one of our Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.