*U› *¢T E C H N O T E : *Inside Macintosh: * QuickDraw GX Series Addenda
*KBy Ingrid Kelly ªª * * 'Apple Developer Technical Support (DTS) *'This Technote discusses addenda to the )“%Inside Macintosh: QuickDraw GX Series )¶. (’ BJThis Note is intended for Macintosh QuickDraw GX developers who are using * 6any version of QuickDraw GX up to and including 1.1.3. ªª , Helvetica
*Topics
*2Addendum to QuickDraw GX Environment and Utilities
*¥
)GX Gestalt Versions )ü
February 1996 ªª
(' B Addendum to QuickDraw GX Objects
*¥ , :H
Letter Gothic :H
)GXGetShapeClipType
ü )V )œ
February 1996 ªª
(W B7Addenda to QuickDraw GX Printing Extensions and Drivers ‡Œ
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√ ° # ‡x
n° #
ÿÜÿÜnÔ , Palatino
. +B ¥
) Post Script Render Options )ü
February 1996
( ! B¥ , :H
Letter Gothic :H
)GXSetupPageImageData
˘ )` message )˛
February 1996
( 9 B¥ :H
) GXPostScriptEjectPendingPage
)Ω message )u
February 1996
( Q B¥ :H
)GXHandleAltDestination
4 )j message )‚
February 1996
( i B¥
) The Alternate Destination (' :H
)≠dsta
¸ ) ') resource )g
February 1996
( ™ B¥
) The Custom Halftone Matrix (' :H
)‘dmat
¸ ) ') resource )]
February 1996
( ˙ B¥
) The Manual Feed Preferences (' :H
)Ÿmfpr
¸ ) ') resource )\
February 1996
( ± B¥
) The Desktop Printer Output (' :H
)Ωoutp
¸ ) ') resource )b
February 1996
( É B¥
)Change Default DTP (' :H
)hpfpr
¸ )') Apple Event )™
February 1996 ªª , Helvetica
( á B"Addenda to QuickDraw GX Typography
*¥ :H
) GXGetLayoutJustificationGap
: )≠ )t
February 1996
( B¥ :H
) GXGetLayoutJustificationFactors
r ) )a
February 1996
() B¥ :H
) GXGetFontDefaultFeatures
)ö
February 1996 33ÿÿ
(] )Addendum to QuickDraw GX Environment and * Utilities ªª
* GX Gestalt Versions
+BJTo determine the current version of QuickDraw GX in general, you call the * NGestalt functions with the various gestalt selectors as outlined on p. 1-4 of (”ΔInside (≤ B1Macintosh: QuickDraw GX Environment and Utilities )ó. ) The function returns a (Ê BNvalue indicating the version of QuickDraw GX printing/graphics/etc. currently * installed. *%This is how the QuickDraw GX gestalt )”' :H
)qdgx
¸ )' ¸ )works: (ú Bmajor revision )rminor revision )lrevision stage ( B0000 )r00 )l00 ( B:Table 1 shows you version gestalt values for QuickDraw GX.
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. +C
0x00010001 )MGX 1.0.1 ( C
0x00010002 )MGX 1.0.2 ( ! C
0x00010100 )MGX 1.1 ( - C
0x00010101 )MGX 1.1.1 ( 9 C
0x00010102 )MGX 1.1.2 ( E C
0x00010103 )MGX 1.1.3 33ÿÿ
( § Addendum to QuickDraw GX Objects ªª , Helvetica
*4GXGetShapeClipType
+B
You can use the , :H
Letter Gothic :H
)FGXGetShapeClipType
ü )V/ function to retrieve the clip shape type that ( ô B a shape is being clipped to. :H
+ .gxShapeType GXGetShapeClipType(gxShape source)
* source )CBA reference to the shape you want to examine the clip property of. (` Cfunction result )C#A reference to the clip shape type.
(≈ DESCRIPTION
+BLThis function is used to determine just the clip shape and eliminates three * Pexpensive steps that were necessary in QuickDraw GX 1.0 to get this information. *OThe clip shape, which you specify using the clip parameter, may be a geometric * Pshape, a bitmap shape, or a glyph shape. In the current implementation , it may * (not be a picture, text, or layout shape. *T¥ If you specify a geometric shape, it must be in primitive form ‹ that is, all the * Lstylistic information about the shape must be incorporated into the shape's * Ngeometry ‹ because this function copies only the geometry-related information * Ofrom the shape you specify. It does not copy the information contained in the * Gshape's style. You can convert a shape to its primitive form using the :H
* GXPrimitiveShape
` )M! function, which is described in ` )Ÿ Inside Macintosh: QuickDraw () B GX Graphics ):9. You can also specify an empty or full shape for a clip. (; BN¥ If you specify a bitmap shape, it must have a pixel size of 1 and its color * profile reference must be :H
)pnil
ê )4. In the bitmap, pixel values of 0 obscure drawing; (S B-pixel values of 1 do not restrict visibility. *N¥ If you specify a glyph shape, this funciton uses information form the glyph ‡Œ
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. +B Oshape's syle object as well as its style list to determine the size, form, and * Rposition of the glyph outlines; those outlines are then used to clip drawing. The * syle list cannot have , :H
Letter Gothic :H
)`nil
¸ )6entries. A style object referenced by the glyph shape ( - BScannot be complex ‹ that is, it cannot have a cap, join, dash, pattern, text face, * Nfont variation, tag list, or any of the properties used only by layout shapes.
( t ERRORS, WARNINGS, AND NOTICES
+BErrors :H
*
out_of_memory * shape_is_nil 33ÿÿ
( Ø 0Addenda to QuickDraw GX Printing Extensions and *Drivers ªª , Helvetica
* PostScript Render Options +$ :H
)gxNoIllegalEPSOperator
4 )j and :H
4 )gxEPSTargetOption
â )Q# flag have been added to PostScript (0 )$ Render Options. :H
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. +B 0For descriptions of other constants, please see )Î Inside Macintosh: QuickDraw GX ( B Printing Extensions and Drivers )⁄
, p. 4-27. ªª , Helvetica
( E GXSetupPageImageData message
+B
QuickDraw GX sends the , :H
Letter Gothic :H
)sGXSetupPageImageData
˘ )` message to indicate the final ( ^ BMformat, page shape, and imaging data for any given page. The message is sent * #once for every page, just prior to :H
)ΔgxStartSendPage
‚ )H . You may wish to override this ( v BRmessage in order to determine the final characteristics of the data which will be * *sent to the printer. Your override of the :H
)“GXSetupPageImageData
˘ )` message must ( ⁄ B match the following declaration: :H
)q6A pointer to a Boolean value. On return, the value is * /true if a page was ejected and false otherwise. ( K Cfunction result )qAn error code. The value :H
)pnoErr
∫ ) indicates that the ( W ´operation was successful.
( • DESCRIPTION
+BKYou can override this message to implement your own page handling. If your * Udriver is going to display a manual feed alert, it is usually desirable to eject the * Gprevious page before asking the user to insert the next sheet of paper.
( Ñ SPECIAL CONSIDERATIONS
+B-Overrides should always forward this message.
(
RESULT CODES :H +CgxSegmentLoadFailedErr
)q9A required code segment could not be found, or there was * not enough memory to load it. :H
(D CgxPrUserAbortErr
)q The user has canceled printing. ªª , Helvetica
(t GXHandleAltDestination message
+B
QuickDraw GX sends the :H
)sGXHandleAltDestination
4 )j message when a destination (Ÿ BIother than "Print" is selected in the Print dialog. Your override of the :H
* GXHandleAltDestination
4 )j. message must match the following declaration: :H
)MF A pointer to a Boolean value. On return, the value is +$ true if the user cancels. (ù Cfunction result )MAn error code. The value :H
)pnoErr
∫ ) indicates that the ( ´operation was successful.
(. DESCRIPTION
+BHThis message is sent when the destination pop-up in the Print dialog is * Ssomething other than Print. For instance, currently, if a user selects File in the * QPrint dialog, the Print button changes to Save. If you have a FAX driver and you * Qwant the Print dialog to be more user-friendly, you simply override this message ‡Œ
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. +B Qto add your destination (e.g., TheFax) and to change the Save button to FAX for * example.
( > SPECIAL CONSIDERATIONS
+BLThe override should check the gxFileFormatTag in the job collection. If the * OfileFormatName is an alternate destination, the driver or extension can either * Ldisplay its own dialog to get more information from the user or forward the * /message for the default 'Standard File' dialog. *$KIn order to change the destination, you must have an alternate destination * R('dsta') resource declared. For more information on the 'dsta' resource, continue * reading this document.
( Ò RESULT CODES , :H
Letter Gothic :H +CgxSegmentLoadFailedErr
)q9A required code segment could not be found, or there was * not enough memory to load it. :H
( CgxPrUserAbortErr
)q The user has canceled printing. ªª , Helvetica
(> +The Alternate Destination ('dsta') Resource
+B
The alternate destination , Geneva )u )(' :H
)dsta
¸ )') resource, of type ¸ )R
(W BgxDestinationAdditionType
)Œ., allows a driver or application to specify a (c BLdestination to be added to the destination pop-up menu in the Print dialog. * CFigure 1 shows the structure of the alternate destination resource.
*,Figure 1 The alternate destination resource :H
+≥destination name
)q<The Pascal string name to show in the print dialog pop- ( ∫up menu. :H
() C button text
)M=The Pascal string name to show in the "OK" button when the (5 ∫?user selects the destination name from above in the pop-up menu (5œ. ªª
(e ,The Custom Halftone Matrix ('dmat') Resource ‡Œ
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4 )W , allows ( BSa driver or application to specify a custom halftone matrix to be used rather than * one of ) Ithe several built-in halftone dot types provided by QuickDraw GX. Figure ( - B22 shows the structure of a custom halftone matrix. , Helvetica
*-Figure 2 The custom halftone matrix resource :H
+Ìdpix
)MBThe dots per inch in the x direction. This is a fixed point value. :H
(# Cdpiy
)MBThe dots per inch in the y direction. This is a fixed point value. :H
(; Cwidth
)MThe width of the matrix. :H
(S Cheight
)MThe height of the matrix. :H
(k C brick offset
)MThe tile shift. (} BUEach entry in the samples array is for a matrix that outlines a specific tile shift. *MIn order to make use of this resource, you must set the dither type of your ' :H
(∂—rdip
¸ )' (˝ B resource to :H
)1 gxCustomDot
Z )5. (– B For more information on the ' :H
)≠rdip
¸ )' resource, please see ¸ )^Inside Macintosh: (’ B,QuickDraw GX Printing Extensions and Drivers )Õ
, p. 6-66. ªª
(é -The Manual Feed Preferences ('mfpr') Resource
+B
The manual feed preferences (' :H
)…mfpr
¸ )') resource, of type :H
( BgxManualFeedAlertPrefsType
l )}2, allows the disabling of manual feed alerts on a ( B+desktop printer. This resource is optional. *EFigure 3 shows the structure of the manual feed preferences resource. ‡Œ
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)C=A collection of flag values that you can combine together to * Aspecify when manual feed alerts will be shown. The first word is * for a driver's private use.
( · BTable 2 )*2Flags used in the manual feed preferences resource ( Û BConstant )rValue )H Explanation :H
( ó C gxShowAlerts
)q0x01 )H)Tells GX to show alerts for this desktop * printer :H
( CgxAlertOnPaperChange
)q0x02 )H$Tells GX to show alerts only if the * paper type changes (M B0The default settings if no resource is found is :H
)ÈgxDefaultMFeedAlertSettings
: )≠ (Y B( :H
)$=gxShowAlerts | gxAlertOnPaperChange
x )–).
(≠ SPECIAL CONSIDERATIONS
+BThe :H
)'mfpr'
T ) and :H
T )'outp'
( ) ) resources must be stored in the desktop (ı Bprinter )*by sending the :H
)SGX )
WriteDTPData
Ä )9 message. The desktop printer (ª B$is the only place QuickDraw GX looks )‹ for these resources. A (¶ B?driver might store these resources when the desktop printer is * created by overriding :H
)xGX )
DefaultDesktopPrinter
)e, forwarding the (Î Bmessage, and then using :H
)—Send_GXWriteDTPData
Ê )[ to write the data. (à BFor more information on :H
)ŒGXDefaultDesktopPrinter
)o and :H
)GXWriteDTPData
F )C, (ì Bsee )7Inside Macintosh: QuickDraw GX Printing Extensions and (ø BDrivers )*. (
B<See the section "The Desktop Printer Output Characteristics * <('outp') Resource" in this document for more information on :H
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ü )V>, allows printer drivers to indicate the characteristics of a ( 0 BQdesktop printer's output device. Currently, this resource only indicates whether * Sor not the desktop printer represents an output device that can be configurable to * different paper types. *KFigure 4 shows the structure of the desktop printer output characteristics * resource.
=A collection of flag values that you can combine together to * 9specify whether a printer is a device with a paper feed. * Currently predefined with :H
){gxCanConfigureTrays
Ê )[ or 0.
(t BTable 3 )*4 Flags used in the manual feed preferences resource (˘ BConstant )rValue )$ Explanation :H
(° CgxCanConfigureTrays
)q0x01 )$+Desktop printer represents a device with a *
paper feed (Î BIf no ' :H
)outp
¸ )G' resource is found in the desktop printers, QuickDraw GX assumes that (Ú BNthe desktop printer is tray-configurable and will display the manual feed and * paper mismatch alerts.
( SPECIAL CONSIDERATIONS
+BThe :H
)'mf ê )pr'
T ) and :H
T )'outp'
( ) ) resources must be stored in the desktop (+ Bprinter by sending the :H
)}GXWriteDTPData
Ä )C message. The desktop printer (7 B$is the only place QuickDraw GX looks )‹ for these resources. A (C B?driver might store these resources when the desktop printer is * created by overriding :H
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ÿÜÿÜnÔ , Palatino
. +B For more information on , :H
Letter Gothic :H
)ŒGXDefaultDesktopPrinter
)o and :H
)GXWriteDTPData
F )C, ( Bsee )7Inside Macintosh: QuickDraw GX Printing Extensions and ( ! BDrivers )*. ( 3 B
See the se )64ction "The Manual Feed Preferences ('mfpr') Resource ( 3œ" ( ? Bin thi ) #s document for more information on :H
)Ò' N )mfpr ∫ )'. ªª , Helvetica
( o %Change Default DTP 'pfpr' Apple Event
+B
QThis Apple Event is used to change the current default desktop printer. In order * 4to use it, you need to send an Apple Event of type ' :H
)ßpfpr
¸ )' (not very mnemonic) to ( ‰ B$the printing extension (creator of ' :H
)˙pxtn
¸ )(') with the data of the event being the ( BPname of the desktop printer that you want to make the default. A good sample of * Lthis can be found on the Developer CD series: Tool Chest Edition under Tool * #Chest: QuickDraw GX: SetDefaultDTP. ªª * Warning )(: ' :H
)pfpr
¸ )2' is currently not a registered part of the Apple ( â B
Event Suite. ,
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( "Addenda to QuickDraw GX Typography ªª
*4GXGetLayoutJustificationGap
+B
You can use the :H
)FGXGetLayoutJustificationGap
: )≠" function to retrieve information (i BLabout the amount of space QuickDraw GX tries to fill when justifying a line. :H
)C;A reference to the layout shape whose information you need. (Õ Cfunction result )CAThe signed difference between the specified width for the layout * %and the measured (unjustified) width.
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ÿÜÿÜnÔ , Palatino
. +B Iabout how much space is added for different kinds of characters (such as * Ckashida, whitespace, and non-whitespace) when a line is justified. , :H
)C;A reference to the layout shape whose information you need. :H
( ™ CconstrainedFactors
ü )V:. An array of Fixed values. On return, the array contains ( Ÿ ∫<factors that represent the portions of available padding by *
priority ( :H
)+gxWhiteSpacePriority
˘ )`$,..) that the layout ended up using ( ¥ ∫ in order to justify the line :H
( ∏ CunconstrainedFactors
˘ )`:. An array of Fixed values. On return, the array contains ( É ∫>factors that represent the characters that were designated as * #being able to absorb unlimited gap. ( Cfunction result )CAThe signed difference between the specified width for the layout * %and the measured (unjustified) width.
(: ERRORS, WARNINGS, AND NOTICES
+BError :H
* shape_is_nil ªª , Helvetica
(‘ GXGetFontDefaultFeatures
+B
You can use the :H
)FGXGetFontDefaultFeatures
‹ )s( function to retrieve information about (¥ B2which layout features in a font happen by default. :H
)C3A reference to the font whose information you need. :H
(ù Cfeatures
› )& ) 2On return, an array of the features for this font. () Cfunction result )CCA list of the feature type/selector pairs that correspond to those * 2features the font designates as default behaviors.
