TweetFollow Us on Twitter

Icon Capture
Volume Number:5
Issue Number:12
Column Tag:Color Workshop

Related Info: Color Quickdraw

Capture Color Icons

By Steve and Patricia Sheets, Herdon, VA

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

Color Icons: Editor and cicnCapture

This month’s Color Quickdraw column consists of less talk and more code. In the last column, the building block data structures needed in order to use and understand color icons were discussed. A new Rez/Derez resource source template was given that allowed easier creation of ‘cicn’ resource (Color Icon template resource). While the template is helpful in learning and understanding color icons, and is an excellent way to present color icons on the written page, most users would prefer to use some graphic base tool to create a color icon. This column contains a quick review of the two color icon editors freely available to the development community. Then, the column will present this months source code, ‘cicnCapture’, a FKEY utility designed to capture an image on the screen and convert it to a color icon resource.

Public Domain Color Icon Editors

There are two different color icon editors available in Public Domain. The very first editor released was the application ‘CIcon Edit’ by Ben Haller of AppleSauce Designs. ‘CIcon Edit’ allows the users to edit color icons of 32 by 32 pixels size that have up to 16 separate colors. The editor can import a ‘cicn’ resource, a ‘ICON’ resource or a ‘ICN#’ resource. This feature makes the tool exceptionally good at coloring existing icon art work. ‘CIcon Edit’ itself is the easiest to use, with a good command set to manipulate the image (move, roll, flip, rotate). This tool has been around the longest (latest version I’ve seen is 1.1) and is virtually bug proof. Unfortunately, the application is lacking in certain areas. This editor is unable to edit a color icon that is any other size than 32 by 32 pixels and 16 colors. There is no method of adjusting any other settings of the resource. ‘CIcon Edit’ does not have a palette of tools (ala MacPaint); the user draws the image a pixel at a time. Also, the load command does not give a list of all the ‘cicn’ resources of the target file. Thus, the user has to keep track of all ‘cicn’ and their ID numbers himself. To be really productive with this tool, the user needs to work ResEdit.

The other PD color icon editor solves this problem by being a ResEdit extension. ‘ResWare’ by Frédéric Miserey of None Corp in Paris consists of certain resources that the user copies into his ResEdit application (replacing some existing ones). Then the user can use ResEdit directly to observe, create and edit ‘cicn’ resources. This utility is a more powerful editor then ‘CIcon Edit’. ‘ResWare’ has a complete tool palette that includes pen, eraser, fill bucket, lasso, and other rectangle commands. The editor can use single color patterns when drawing. There is no practical limit to the size of the color icon, nor the number of colors. Also the editor allows the user to change other portions of the ‘cicn’ resource including horizontal and vertical size, component count, component size and pixmap method (Chunky, Chunky/Planar or Planar). However the editor is still in beta form (latest version I’ve seen is 1.0b4) and has caused numerous crashes. ‘ResWare’ has no import feature, and the editor, while more powerful, is not as easy to use for beginners as ‘CIcon Edit’.

Importing Images into Color Icons

While both editors are useful in creating color icons, they both suffer from a common fault. They do not allow easy import of an image on the screen into a ‘cicn’ resource. At first, it may not seem as if this is a problem. Of course, the editor will only be used to create a ‘cicn’ resource. However, this is not always the case. Look at what happened with original Quickdraw and the creation of ‘ICON’ and ‘ICN#’ resources. Even though there were a few icon editors, many non-technical users created their images with the more powerful Paint and Draw programs. Then they handed the complete art work to a programmer, expecting him to be able to use it directly. The programmer had no way to directly transfer an art document into a ‘ICON’ or ‘ICN#’ resource. In many cases, the programmer had to reenter the image into the icon editor one pixel at a time. To solve this problem, many programmers created various Icon-Grapper types of utilities. These utilities, usually Desk Accessories or FKEYs, allowed the programmer to capture any portion of the screen and convert it into an icon resource. Since it captured an image on the screen and did not need to directly convert any type of document, these utilities would work with any Paint or Draw application.

A user who wanted to convert a Pixel Paint or MacDraw // image into a ‘cicn’ resource would have the identical problem. The problem is further complicated, since the user would have to worry not only about the 32 by 32 pixel image, but would have to import a color list, a mask and a black and white icon. I had this problem. The graphic designer of my latest project presented the technical team with a group of Pixel Paint files, each one having a dozen or so images on it. It would have taken hours of work to reenter the images using one of the color icon editors. That estimate was assuming that the artwork was the finished product, and not going to be revised. This started looking like a potential nightmare.

cicnCapture

The solution to this problem is being provided as the sample source code. ‘cicnCapture’ is an FKEY utility that can capture a 32 by 32 pixel image of the screen, containing up to 256 different colors, and create a ‘cicn’ resource that contains this image. The code uses the Quickdraw call, GetCPixel, to determine the color of each pixel in the image. Since the code uses this call instead of reading the screen PixMap directly, it will work on any depth or type of screen or monitor as long as Color Quickdraw is installed. Once the image has been captured, the information is saved out to a specified resource file.

Using this utility on our software project, it took a few minutes to import all of the color images into ‘cicn’ resource. ‘CIcon Edit’ and ‘ResEdit’ were used afterward, but mainly to make sure the images had the correct ID number, and that they were centered on the 32 by 32 pixel icon.

Next Column

Anyone remember the game, ‘Daleks’? This application was one of the first, and best, Public Domain games around. Next issue’s sample code will be ‘Color Daleks’. The program will show how to directly draw and manipulate color icons. Various color drawing modes will be explained, as well as some animation speed up tricks.

{cicnCapture-  Color Icon Capture FKEY }
{by Steve Sheets for MacTutor 9/3/89 }
{FKEY is normal saved to resource type ‘FKEY’, ID = 7 }
{This FKEY captures a 32 by 32 Pixel section of the screen and converts 
it into a ‘cicn’ resource (Color Icon }
{template).   When the user activates the Function Key and click somewhere 
on the screen, that portion of the }
{screen is recorded (colors and pixels) and a cicn handle is created. 
 Remember a cicn handle is different than }
{an actual Color Icon handle. The cicn handle/resoure is a template for 
a Color Icon.  The Color Quickdraw }
{command, GetCIcon, uses the cicn resource to determine how to make a 
Color Icon. }
{FKEY is written in Think’s Lightspeed Pascal 2.0. }

unit cicnCapture;

interface

 uses
 Quickdraw, ToolIntf;

{FKEY (function key) code resources must have be an unit with a single 
externally reference procedure called }
{‘Main’.}

 procedure Main;

implementation

 procedure Main;

{The ‘cicn’ resource consists of three variable length parts.  The first 
part contains the Pixmap info, the Black }
{& White Icon and the Mask.   The second part contains the Color Lookup 
table (ie. list of colors used in the }
{cicn).  The size of this part is dependent on the number of different 
colors in the cicn.  The last part of the }
{resource is the pixel data.  The size of this is dependent on the number 
of different colors in the cicn.  If }
{there are 2 to 16 colors, the pixel info can be stored in a 4 bit pixel 
maip, if the number of colors is 17 to }
{256, then the info must be stored in a 8 bit pixel map.  Given the fact 
this FKEY only captures 32 by 32 cicn, }
{the size of the first part is fixed, while the size of the third part 
is one of two possible fixed sizes. }

 type
 IconData = packed array[0..31] of LongInt;

{First part of cicn resource for a 32 by 32 pixel cicn.}

 cicnData = record
 baseAddr: LongInt;
 rowbytes: INTEGER;
 bounds: Rect;
 pmVersion: INTEGER;
 packType: INTEGER;
 packSize: LongInt;
 hRes: LongInt;
 vRes: LongInt;
 pixelType: INTEGER;
 pixelSize: INTEGER;
 cmpCount: INTEGER;
 cmpSize: INTEGER;
 planeBytes: LongInt;
 pmTable: LongInt;
 pmReserved: LongInt;

 MaskBaseAddr: LongInt;
 MaskRowBytes: INTEGER;
 MaskBounds: Rect;

 BMapBaseAddr: LongInt;
 BMapRowBytes: INTEGER;
 BMapBounds: Rect;

 IconData: LongInt;

 theMask: IconData;

 theBMap: IconData;

 ctSeed: LongInt;
 ctFlags: INTEGER;
 ctSize: INTEGER;
 end;
 cicnPtr = ^cicnData;

{2nd part (CLUT) of cicn resource for 32 by 32 pixel cicn. }

 CTableData = packed array[0..255] of ColorSpec;
 CTablePtr = ^CTableData;

{3rd part of cicn resource for 8 bit, 32 by 32 pixel cicn. }

 pixel8Data = packed array[0..31, 0..31] of 0..255;
 pixel8Ptr = ^pixel8Data;

{3rd part of cicn resource for 4 bit, 32 by 32 pixel cicn. }

 pixel4Data = packed array[0..31, 0..15] of 0..255;
 pixel4Ptr = ^pixel4Data;

 var
 thePos: Point;
 thePixel8: pixel8Data;
 theNumColors: INTEGER;
 theIcon: IconData;
 theColorList: packed array[0..255] of RGBColor;
 theCICN: Handle;

{Tell us if Color Quickdraw is installed on machine. }

 function IsColorQuickdraw: BOOLEAN;
 const
 ROM85Loc = $28E;
 TwoHighMask = $C000;
 type
 WordPtr = ^INTEGER;
 var
 Wd: WordPtr;
 begin
 Wd := POINTER(ROM85Loc);
 IsColorQuickdraw := (BitAnd(Wd^, TwoHighMask) = 0);
 end;

{Sets cursor to show an upper left portion of a square.}

 procedure InitSquare;
 var
 count: INTEGER;
 Square: Cursor;
 begin
 with Square do
 begin
 data[0] := $FFFF;
 mask[0] := 0;
 for count := 1 to 15 do
 begin
 data[count] := $8000;
 mask[count] := 0;
 end;
 hotSpot.v := 0;
 hotspot.h := 0;
 end;
 SetCursor(Square);
 end;

{Wait until the user presses the mouse, making sure the mouse was not 
pressed to begin with.  Then stores}
{the postion of the mouse and flushes the mouse events. }

 procedure GetPos;
 begin
 while button do
 ;
 while not button do
 ;
 GetMouse(thePos);
 FlushEvents(mDownMask + mUpMask, 0);
 end;

{Given the position of the mouse, captures a 32 by 32 array of pixels 
and a list of the colors.  The}
{pixel information is not stored as RGB values, but as a number (zero 
count) that represents that }
{RGB value in the Color List (ie. value of 2 equals third color in list). 
 Thus every time a pixel on }
{the screen is looked at with the GetCPixel command, that RGB value is 
looked for in the Color List. }
{If the color is found, that number is stored in the 2 dimensional pixel 
array.  If the pixel uses a }
{new RGB color (not found in the list), that color is added to the list. 
 The number that represents }
{that new color is stored in the pixel array.  This way, at the end, 
the program knows exactly what}
{colors are used.  The code does not care about the depth of the screen 
(1, 2, 4, 8, 16 or 24 bits}
{per pixels).  However this cicn resource uses the Chunky model, thus 
only 256 colors can be used }
{(fairly safe limit).  The list will always contain black and white as 
the first two colors in the list.  }
{This procedure also creates a black and white 32 by 32 bit icon for 
the mask and the Black and}
{White icon portion of the cicn.  Any color other than white indicates 
a black bit.}

 procedure GetPixels;
 var
 h, v, theNum, count: INTEGER;
 theColor: RGBColor;
 begin
 theNumColors := 1;
 with theColorList[0] do
 begin
 red := $FFFF;
 green := $FFFF;
 blue := $FFFF;
 end;
 with theColorList[1] do
 begin
 red := 0;
 green := 0;
 blue := 0;
 end;
 for v := 0 to 31 do
 begin
 theIcon[V] := 0;
 for h := 0 to 31 do
 begin
 GetCPixel(thePos.h + h, thePos.v + v, theColor);
 theNum := -1;
 for count := 0 to theNumColors do
 if (theColor.red = theColorList[count].red) then
 if (theColor.green = theColorList[count].green) then
 if (theColor.blue = theColorList[count].blue) then
 theNum := count;
 if (theNum = -1) and (theNumColors < 255) then
 begin
 theNumColors := theNumColors + 1;
 theNum := theNumColors;
 theColorList[theNum] := theColor;
 end;
 thePixel8[v, h] := (theNum mod 256);
 if (theColor.red <> -1) or (theColor.green <> -1) or (theColor.blue 
<> -1) then
 BitSet(@theIcon[V], h);
 end;
 end;
 end;

{Having pixel infor, allocates memmory for cicn handle.}

 procedure MakeCICN;
 var
 theCICNptr: cicnPtr;
 theCTablePtr: CTablePtr;
 thePixel8Ptr: Pixel8Ptr;
 the4PixelPtr: Pixel4Ptr;
 theRect: Rect;
 count, v, h, theTableSize, theImageRowBytes, theBitsPixel, thePixelDataSize: 
INTEGER;
 begin
 SetRect(theRect, 0, 0, 32, 32);

{If number of colors is more than 16, then use 8 bit pixel map, else 
use 4 bit pixelmap (Rowbytes of pixmap is }
{diffent, bit depth is different, size of pixel data is different).  
Notice that Rowbytes must have the high bit }
{set.}

 if (theNumColors > 16) then
 begin
 theBitsPixel := 8;
 theImageRowBytes := $8020;
 thePixelDataSize := SizeOf(pixel8Data);
 end
 else
 begin
 theBitsPixel := 4;
 theImageRowBytes := $8010;
 thePixelDataSize := SizeOf(pixel8Data) div 2;
 end;
 theTableSize := (theNumColors + 1) * SizeOf(ColorSpec);

{Allocate size of handle (dependent on number of colors & 4 or 8 bit 
pixelmap. }

 theCICN := NewHandle(SizeOf(cicnData) + theTableSize + thePixelDataSize);
 HLock(theCICN);
 theCICNptr := POINTER(theCICN^);

{Stuff first part of cicn handle.  }

 with theCICNptr^ do
 begin
 baseAddr := 0;
 rowbytes := theImageRowBytes;
 bounds := theRect;
 pmVersion := 0;
 packType := 0;
 packSize := 0;
 hRes := $00480000;
 vRes := $00480000;
 pixelType := 0;
 pixelSize := theBitsPixel;
 cmpCount := 1;
 cmpSize := theBitsPixel;
 planeBytes := 0;
 pmTable := 0;
 pmReserved := 0;

 MaskBaseAddr := 0;
 MaskRowBytes := 4;
 MaskBounds := theRect;

 BMapBaseAddr := 0;
 BMapRowBytes := 4;
 BMapBounds := theRect;

 IconData := 0;

 theMask := theIcon;

 theBMap := theIcon;

 ctSeed := 0;
 ctFlags := 0;
 ctSize := theNumColors;
 end;

{Stuff second part, the Color Look Up table (color list).}

theCTablePtr := POINTER(ORD4(theCICNptr) + SizeOf(CICNData));

 for count := 0 to theNumColors do
 with theCTablePtr^[count] do
 begin
 value := count;
 rgb := theColorList[count];
 end;

{Stuff the third part of the cicn handle, the actual pixmap data.  If 
an 8 bit pixmap is used, the format of }
{the data is identical to the array used to store the pixel information 
so the data is simply moved into the }
{handle.  If the pixmap is a 4 bit one, the pixel info is moved into
 another array that has the format of a 4 }
{bit pixmap data, then that data moved into the handle. }

 if (theNumColors > 15) then
 begin
 thePixel8Ptr := POINTER(ORD4(theCTablePtr) + theTableSize);
 thePixel8Ptr^ := thePixel8;
 end
 else
 begin
 the4PixelPtr := POINTER(ORD4(theCTablePtr) + theTableSize);
 for v := 0 to 31 do
 for h := 0 to 15 do
 the4PixelPtr^[v, h] := ((thePixel8[v, (h * 2)] * 16) + thePixel8[v, 
(h * 2) + 1]) mod 256;
 end;

 HUnLock(theCICN);
 end;

{Given a cicn handle, store it into a resource file (new or existing 
one) as a ‘cicn’ resource.}

 procedure SaveCICN;
 var
 theWhere: Point;
 theRef, theVol: INTEGER;
 theE: OSErr;
 theReply: SFReply;
 begin
 theWhere.h := 40;
 theWhere.v := 40;
 SFPutFile(theWhere, ‘Save Color Icon to File:’, ‘cicn File’, nil, theReply);
 if theReply.good then
 begin
 theE := GetVol(nil, theVol);
 theE := SetVol(nil, theReply.vRefNum);
 theRef := OpenResFile(theReply.fName);
 if theRef = -1 then
 begin
 CreateResFile(theReply.fname);
 theRef := OpenResFile(theReply.fname);
 end;

 if theRef <> -1 then
 begin
 AddResource(theCICN, ‘cicn’, UniqueID(‘cicn’), ‘’);
 WriteResource(theCICN);
 ReleaseResource(theCICN);
 theCICN := nil;

 CloseResFile(theRef);
 end;
 theE := SetVol(nil, theVol);
 end;
 if theCICN <> nil then
 begin
 DisposHandle(theCICN);
 SysBeep(1);
 end;
 end;

{Main Procedure.  If there is Color Quickdraw, init the cursor to a square, 
get the position of the mouse when the }
{user clicks, the pixels at that position, convert pixels into a cicn 
handle, save the cicn handle to a resource and }
{finally reset the cursor back to an arrow.  If there is not Color Quickdraw 
on the machine, complain! }
 begin
 if IsColorQuickdraw then
 begin
 InitSquare;
 GetPos;
 GetPixels;
 MakeCICN;
 SaveCICN;
 InitCursor;
 end
 else
 SysBeep(1);
 end;
end.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

WRIO Keyboard (Utilities)
WRIO Keyboard 1.0 Device: iOS iPhone Category: Utilities Price: $2.99, Version: 1.0 (iTunes) Description: 40% OFF DURING LIMITED INTRODUCTORY OFFER | Read more »
Hatoful Boyfriend (Games)
Hatoful Boyfriend 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: The hit PC game that everybirdie loves has now migrated to your mobile device! Now you are free to explore the wonders of St... | Read more »
Warp Shift (Games)
Warp Shift 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: [ CHECK YOUR HARDWARE: Warp Shift does NOT run on iPhone 4, iPad 1 and iPod touch 4G or older devices! It requires at least iOS8... | Read more »
Lifeline: Whiteout (Games)
Lifeline: Whiteout 1.0.2 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0.2 (iTunes) Description: Alone in a frozen wasteland with no memory of how he got there, a lost adventurer’s only hope is his last line of... | Read more »
Castles of Mad King Ludwig (Games)
Castles of Mad King Ludwig 1.0.1 Device: iOS Universal Category: Games Price: $6.99, Version: 1.0.1 (iTunes) Description: | Read more »
How to command and conquer in Raid HQ
Raid HQ is a satisfyingly deep base building game with over-the-top macho action and explosions. This little free to play bundle gives you a lot to do from managing a squad to building the most powerful base you possibly can. [Read more] | Read more »
How to build a successful civilisation i...
GodFinger 2 grants you godlike powers, leaving you to raise a civilization of followers. In the spirit of games like Black & White, the GodFinger games will see you building bigger and better villages, developing more advanced technology and... | Read more »
How to get all the crabs in Mr Crab 2
Mr. Crab 2 may look like a cutesy platformer for kids, but if you're the kind of person who likes to complete a game 100%, you'll soon realise that it's a tougher than a crustacean's shell. [Read more] | Read more »
How to be a star in Britney Spears: Amer...
If you've ever wanted to be a star, baby, then you've probably already checked out Britney Spears: American Dream and are happily making your way up the charts. But fame doesn't come easy, and everyone needs a helping hand sometimes. So we've got... | Read more »
AppSpy is hiring a part time Staff Write...
| Read more »

Price Scanner via MacPrices.net

Apple refurbished iMacs available for up to $...
Apple has Certified Refurbished 2015 21″ & 27″ iMacs available for up to $350 off MSRP. Apple’s one-year warranty is standard, and shipping is free. The following models are available: - 21″ 3.... Read more
Textkraft Professional Becomes A Mobile Produ...
The new update 4.1 of Textkraft Professional for the iPad comes with many new and updated features that will be particularly of interest to self-publishers of e-books. Highlights include import and... Read more
SnipNotes 2.0 – Intelligent note-taking for i...
Indie software developer Felix Lisczyk has announced the release and immediate availability of SnipNotes 2.0, the next major version of his productivity app for iOS devices and Apple Watch.... Read more
Pitch Clock – The Entrepreneur’s Wingman Laun...
Grand Rapids, Michigan based Skunk Tank has announced the release and immediate availability of Pitch Clock – The Entrepreneur’s Wingman 1.1, the company’s new business app available exclusively on... Read more
13-inch 2.9GHz Retina MacBook Pro on sale for...
B&H Photo has the 13″ 2.9GHz Retina MacBook Pro (model #MF841LL/A) on sale for $1599 including free shipping plus NY tax only. Their price is $200 off MSRP. Amazon also has the 13″ 3.9GHz Retina... Read more
Apple price trackers, updated continuously
Scan our Apple Price Trackers for the latest information on sales, bundles, and availability on systems from Apple’s authorized internet/catalog resellers. We update the trackers continuously: - 15″... Read more
Clearance 12-inch Retina MacBooks available s...
B&H Photo has dropped prices on leftover 2015 12″ Retina MacBooks with models now available starting at $999. Shipping is free, and B&H charges NY tax only: - 12″ 1.1GHz Gray Retina MacBook... Read more
Check Apple prices on any device with the iTr...
MacPrices is proud to offer readers a free iOS app (iPhones, iPads, & iPod touch) and Android app (Google Play and Amazon App Store) called iTracx, which allows you to glance at today’s lowest... Read more
New 2016 13-inch 256GB MacBook Air on sale fo...
B&H Photo has the new 13″ 1.6GHz/256GB MacBook Air (model MMGG2LL/A) on sale for $1149 including free shipping plus NY sales tax only. Their price is $50 off MSRP. Amazon has the 13″ 1.6GHz/256GB... Read more
Apple refurbished iPad Air 2s available start...
Apple has Certified Refurbished iPad Air 2 available starting at $339. Apple’s one-year warranty is included with each model, and shipping is free: - 128GB Wi-Fi iPad Air 2: $499 - 64GB Wi-Fi iPad... Read more

Jobs Board

*Apple* Nissan Service Technicians - Apple A...
Apple Automotive is one of the fastest growing dealer...and it shows. Consider making the switch to the Apple Automotive Group today! At Apple Automotive , Read more
ISCS *Apple* ID Site Support Engineer - APP...
…position, we are looking for an individual who has experience supporting customers with Apple ID issues and enjoys this area of support. This person should be Read more
Automotive Sales Consultant - Apple Ford Linc...
…you. The best candidates are smart, technologically savvy and are customer focused. Apple Ford Lincoln Apple Valley is different, because: $30,000 annual salary Read more
*Apple* Support Technician II - Worldventure...
…global, fast growing member based travel company, is currently sourcing for an Apple Support Technician II to be based in our Plano headquarters. WorldVentures is Read more
Restaurant Manager (Neighborhood Captain) - A...
…in every aspect of daily operation. WHY YOU'LL LIKE IT: You'll be the Big Apple . You'll solve problems. You'll get to show your ability to handle the stress and Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.