466 lines
22 KiB
Plaintext
466 lines
22 KiB
Plaintext
;
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; File: ShowINIT.a
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;
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; Contains: xxx put contents here xxx
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;
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; Written by: xxx put writers here xxx
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;
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; Copyright: © 1993 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <1> 1/4/93 ejb first checked in
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;
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;
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; File: ShowINIT.a
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; Last Modified: Monday, December 21, 1992 1:17:00 PM
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;
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; # after any modification, please execute the following giberish to update the dates in this file
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; find ∞ "{active}"; replace \(([∂"∂'])®0Version of )®1≈\ "®1`date -d -s`®0" "{active}"
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; find • "{active}"; replace /(Last∂ Modified: )®0≈/ "®0`date`" "{active}"
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;————————————————————————————————————————————————————————————————————————————————————————————————
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;
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; INIT notification routine
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; by Paul Mercer, Darin Adler, Paul Snively, Frédéric Miserey, Alex Rosenberg,
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; and François Grieu, from an idea by Steve Capps
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;
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; The whole thing is for drawing an extension's icon during the boot process;
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; this code has had a complicated life cycle: there are dozens of different
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; versions around in the wilderness.
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;
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; François Grieu, latest offender of this code, is on AppleLink FRA0003
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; the internet address is: FRA0003@AppleLink.Apple.COM
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;
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; This particular variation :
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; - knows how to wrap around the screen, for thoose with many inits; this only
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; works with cooperating ShowINITs
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; - draw from ICN#/icl4/icl8 combos, now the standard for icons; the best
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; source is choosen according to main screen pixel depth and available resources
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; - does NOT support the ‘old’ cicn resources
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; - displays a nice empty square if no valid ICN# is present (new feature)
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; - has been rewritten for extreme compactness: shrinked from 964 to 500 bytes,
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; while lot of error prevention and checking was added.
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; - is heavily commented, hopefuly compensating much of the obfuscation introduced.
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;
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; as supplied, the programming interface is :
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;
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; extern pascal void ShowINIT(short iconID, short moveX);
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;
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; PROCEDURE ShowINIT(iconID: INTEGER, moveX: INTEGER); EXTERNAL
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;
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; iconID: resource ID of an ICN#, and (optionaly) of an icl4 and/or icl8
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; moveX: horizontal displacement for next icon; legitimate values are
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; -1 or 40 standard 40 pixels displacement
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; 0 no displacement (for animation purproses)
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;
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; a typical INIT with a small animation looks like :
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;
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; ShowINIT(128,0); /* draw first icon, don't move */
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; doMyOwnjob(); /* do some usefull stuff */
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; ShowINIT(129,-1); /* draw second icon, advance for next */
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;
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;
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; (FRG: My first idea was to remove the moveX parameter entirely, since I never use it;
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; later I realised it meant others could not just use my code as a drop-in replacement,
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; and precluded animations; thus, I introduced an assembly option to control what moveX
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; does, and if it exists; see below under moveX_option)
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;
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;————————————————————————————————————————————————————————————————————————————————————————————————
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; Revision history
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;
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; 6/7/87 PM - Created First version.
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; 6/15/87 PM - Changed to standard (Pascal) calling conventions.
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; 6/20/87 PM - Fixed color & Finder bug on Mac II.
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; 6/22/87 DBA - Improved handling of QuickDraw.
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; 6/29/87 DBA - Used scratch8 to avoid conflict with “Easy Access”.
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; 6/30/87 DBA - Changed to a 4-byte scheme with “checksum”.
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; 6/30/87 PFS - Separated into ShowINIT and InnerShowINIT.
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; 7/1/87 DBA - Fixed stack bug and switched to CurApName.
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; 7/2/87 PM - Added check for old signature in ApplScratch for backword compatibility
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; (TMON Startup).
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; 7/3/87 PM - Removed _SysBeep in ErrorExit since it causes a crash.
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; - Also changed ICN# plotter to srcOr mode for Blinker.
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; 7/13/87 PM - Fixed A3 trashing bug in InnerShowINIT - exit code left word on stack
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; (reported by D. Dunham).
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; 7/21/87 PM - Due to popular demand, InitGraf is no longer being called.
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; This avoids the gamma correction problem with Startupscreens getting
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; “washed out” by ShowINIT, though someone else is still bound to call
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; InitGraf sooner or later (i.e. InitWindows).
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; 7/29/87 PM - Put InitGraf back in; this is required (reported by C. Derossi at Apple
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; Tech Support).
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; - Took out GetPort/SetPort.
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; 10/6/87 PM - Set CurrentA5 properly. Rearranged myVars.
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; 12/28/87 PM - Major revision to accomodate future INIT31 based ShowINIT.
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; 7/14/88 PM - Major revision to get rid of above 'accomodations'.
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; - Added color icon 'cicn' support and fixed beep crash.
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; - Removed support for old signature.
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; 11/25/89 PM - Added Y dimension support, icl4/8 support to get rid of 'obsolete' cicns.
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; 3/27/90 AMR - 'cicn's were not being drawn in their native size
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; 11/30/91 FRG - Started from source found on ‘Lord of the Files’, dev. CD Vol VII.
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; - Removed cicn support - these are obsolete and may cause palette problems
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; - Introduced a right margin (causes wraparound sooner on a few sreens).
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; - Simplified A5 world allocation; all variables now A5-based
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; - Initialized more fields in the PixMap.
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; - Added a check that ICN#/icl4/icl8 resources are at least the expected size;
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; blockmoved these into variables and disposed the Resource immediately;
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; default drawing if no ICN# can be loaded; many other sanity cheks.
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; - Rather than disposing the Color Map of the PixMap returned by _NewPixMap and
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; later manufacturing an empty Color Map before disposing the PixMap, we now
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; save the original Color Map, and restore it before disposing the PixMap.
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; 12/3/91 FRG - Introduced moveX_option for backward link-level compatibility.
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; - Spread subroutines to use short branchs where possible.
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; - Firmly decided to stop shrinking the code - maybe it's too late.
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; 12/4/91 FRG - Did extensive tests on many configurations and monitor stiings, including
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; - Plus and SE under 6.0.7 and 3.2
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; - II under System 6.0.7 and 3.2
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; - IIcx under System 7
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; - IIci under 6.0.7 and 7.0.1
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; - IIfx under 7.0 and two Apple 13" monitors
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; - IIfx under 6.0.7 and 32 bits color (RasterOps card & monitor)
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; not a single crash; the INIT adapts well to the environment and draws using
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; the right resource and colors; however, there are quite a few visual
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; glitches with old INITs, when drawing past the first line. Many keep drawing
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; on the bottom line; some will allow only two or three lines.
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; All in all, the method implemented seems to be the ‘official’ one, and
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; reasonably compatible with what's around.
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; - AppleLink relase.
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; 12/21/92 - Call LoadResource after GetResource <rb>
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; 3/26/93 chp - Change QuickEqu.a to QuickDraw.a for new AIncludes.
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;
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;————————————————————————————————————————————————————————————————————————————————————————————————
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;
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INCLUDE 'Traps.a'
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INCLUDE 'SysEqu.a'
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INCLUDE 'QuickDraw.a'
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;
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;————————————————————————————————————————————————————————————————————————————————————————————————
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;
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; Assembly-time option for moveX parameter treatment. Allowable values for moveX_option are :
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; 0 ; original : negative value -> 40, other taken as is
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; 1 ; enforce standard : zero -> no move, others -> 40 pixels right
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; 2 ; no moveX parameter - function name changed to ShowINIT_EZ
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;
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; if necessay, moveX_option can be set up from the command line, for example:
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; ASM -d moveX_option=2 ShowINIT.a
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;
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; with moveX_option=2, the programming interface becomes :
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;
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; extern pascal void ShowINIT_EZ(short iconID);
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;
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; PROCEDURE ShowINIT_EZ(iconID: INTEGER); EXTERNAL
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;
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;
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IF &TYPE('moveX_option') = 'UNDEFINED' THEN
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moveX_option SET 0 ; default to old behaviour
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ENDIF
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;
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;
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PROC
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IF moveX_option <> 2 THEN ; option 2 supresses the moveX parameter and change name
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EXPORT (ShowINIT):CODE ; keep standard name
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ELSE
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EXPORT (ShowINIT_EZ):CODE ; name when no moveX parameter
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ENDIF
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;
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; other constants
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iconSize EQU 32 ; X & Y size of icons (don't even think to change this…)
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iconSpacer EQU 8 ; X & Y spacing, and top/left/bottom/right sreen margin
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checksumConst EQU $1021 ; constant used for computing checksum
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minColorDepth EQU 4 ; minimum bits/pixel for drawing color icons
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iconRowBytes EQU 32/8 ; 32/8 bits
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hasCQDBit EQU 6 ; this bit in ROM85 is cleared if Color QuickDraw is available
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;
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; remanent low mem variables; CurApName+32-8 is a GREAT place to store 8 bytes (it was Darin's idea)
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myVCheck EQU CurApName+32-8 ; a simple checksum of myV to determine first-timeness
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myV EQU myVCheck+2 ; current vertical position
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myH EQU myV+2 ; current horizontal position
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myHCheck EQU myH+2 ; a simple checksum of myH to determine first-timeness
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;
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; our register list: D7 and A6 are still for rent !!
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savedRegList REG D3-D6/A2-A5 ; registers used - adjust savedRegCnt accordingly
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savedRegCnt EQU 8 ; count of saved registers
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; our variables and buffers; allocated on the stack, making an A5 world
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; insert new fields only as advertised; do not reorder
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stackFrame RECORD {A5Link},DECR ; build a stack frame record
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paramBegin EQU * ; start parameters after this point
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iconID DS.W 1 ; resource ID of the ICN#/icl4/icl8 combo
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IF moveX_option <> 2 THEN ; option 2 supresses the moveX parameter
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moveX DS.W 1 ; horizontal move parameter
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ENDIF
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; insert additionnal parameters here
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paramSize EQU paramBegin-* ; size of all the passed parameters
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DS.L 1 ; place holder for return address
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DS.L savedRegCnt ; place holder for saved registers
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A5Link DS.L 1 ; QuickDraw will stuff a pointer to his variables here
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; possible location for additionnal variables
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thePort DS.L 1 ; QuickDraw globals
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DS.B grafSize-4 ; other QuickDraw globals (except thePort)
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; prefered location for additionnal variables
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myPort DS.B portRec ; a private port
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myBitMap DS.B bitmapRec ; private bitMap record for our ICN# offscreen
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; possible location for additionnal variables
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buf_iclx DS.B 1024 ; room for an icl8 (also hold the icl4)
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; possible location for additionnal variables
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buf_mask DS.B 128 ; ICN# mask
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buf_icon DS.B 128 ; ICN# icon
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dstRect DS.B 8 ; the rectangle we draw to - must be last
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varsSize EQU *
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ENDR
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WITH stackFrame ; cover our local stack frame
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;
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;————————————————————————————————————————————————————————————————————————————————————————————————
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;
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;
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; the entry point : this is to be kept on the first instruction of the module, for compatibility
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; only one of the two label is realy exported, depending on moveX_option
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ShowINIT:
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ShowINIT_EZ:
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;
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; first we build an A5 world on the stack. This why we save the registers before the LINK An,#
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MOVEM.L savedRegList,-(A7) ; save registers, including A5
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LINK A5,#varsSize ; allocate our variables & A5 world
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MOVE.L A7,A2 ; points to dstRect - used later
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;
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; initialise QuickDraw gear
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; we open a new port to get fresh information, and isolate the screen port from our messing
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PEA thePort(A5)
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_InitGraf ; fixes color bug as per DA@ICOM
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LEA myPort(A5),A4 ; will later move into myBitMap
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MOVE.L A4,-(A7) ; _ClosePort parameter (done in cleanup)
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MOVE.L A4,-(A7) ; _OpenPort parameter
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_OpenPort
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;
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; setup myBitMap to refer to the ICN# mask (not yet loaded)
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MOVE.L #(iconSize<<16)+iconSize,D6 ; D6 constant from now on
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MOVE.L D6,-(A4) ;bounds.botRight
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CLR.L -(A4) ;bounds.topLeft ; 0-0-32-32 standard icon bounds
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MOVE.W #iconRowBytes,-(A4) ;rowBytes
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LEA buf_mask(A5),A0 ; pointer to Mask
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MOVE.L A0,-(A4) ;baseAddr ; A4 is ptr to myBitMap from now on
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;
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; (11/30/91 FRG) build drawing coordinates and update the remanent variables
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; First we calculate the rightmost position allowable.
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; There is, purprosely, a small deviation from the original : we have a 7 pixels right margin.
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; Also note that the moveX parameter is always ignored for wraparound calculation, as in the original,
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; else it would ruin animation on the rightmost position
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MOVEQ #iconSize+iconSpacer,D2 ; (horizontal spacing) added in valid_coord
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MOVE.W myPort+portBounds+right(A5),D1 ; horizontal screen size
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SUB.W D2,D1 ; maximum in valid_coord (right margin)
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IF moveX_option = 0 THEN ; original
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MOVE.W moveX(A5),D2 ; prescribed horizontal spacing
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BPL.S more ; must be non-negative
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MOVEQ #iconSize+iconSpacer,D2 ; default horizontal spacing
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ELSEIF moveX_option = 1 THEN ; enforce regular icon spacing
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TST.W moveX(A5) ; flag for horizontal spacing
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BNE.S more ; non-zero means default
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MOVEQ #0,D2 ; zero means no move
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ENDIF
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more MOVEQ #0,D3 ; nothing yet to be substracted in valid_coord
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MOVEQ #iconSpacer,D4 ; default (for valid_coord)
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MOVE.L myH,D0 ; get myH & myHCheck
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SWAP D0 ; myHCheck <-> myH (reversed for historical reasons)
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BSR.S valid_coord ; build left coordinate
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SWAP D0 ; myH <-> myHCheck (reversed for historical reasons)
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MOVE.L D0,myH ; save updated myH & myHCheck
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MOVEQ #-(iconSize+iconSpacer),D4
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ADD.W myPort+portBounds+bottom(A5),D4 ; vertical default
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MOVEQ #0,D2 ; nothing to be added
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MOVE.W D4,D1 ; maximum (same as default)
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MOVE.L myVCheck,D0 ; get myVCheck/myV
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BSR.S valid_coord ; build top coordinate
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MOVE.L D0,myVCheck ; store myVCheck/myV
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;
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; result (topLeft of our location on the screen) is in D5. A2 points to dstRect
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MOVE.L D5,(A2)+ ;topLeft ; save the resulting X/Y coordinate
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ADD.L D6,D5 ; compute the botRight (no overflow can occur)
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MOVE.L D5,(A2)+ ;botRight ; make an icon-sized rect
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;
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; load the ICN#
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MOVEQ #256/128,D3 ; size for DATA+MASK
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MOVE.L #'ICN#',D4 ; note that here A2 points to buf_icon
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BSR.S load_rsrc ; load the icon and mask
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BEQ.S got_mask ; ICN# loaded ok
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;
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; (11/30/91 FRG) no resource loaded; draw a simple light gray rect with black border
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PEA ltGray+thePort(A5)
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_BackPat ; set background pattern to light gray
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PEA dstRect(A5) ; _FrameRect parameter
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MOVE.L (A7),-(A7) ; _EraseRect parameter
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_EraseRect ; make the inside
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_FrameRect ; and the border
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BRA.W cleanup
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;
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; (11/30/91 FRG) coordinate validator; called two times to process the H then V coordinates; trashes A0
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; reg *** on entry *** *** on exit ***
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; D0 lo:coordinate hi:alleged checksum lo: result coordinate hi:updated checksum
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; D1 maximum value unchanged
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; D2 post-offset (added for horizontal shift) unchanged
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; D3 pre-offset (substracted for vertical offset) set to iconSize+iconSpacer if maximum exceeded
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; D4 default when invalid checksum or out of bound unchanged
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; D5 lo:ignored hi:previous result lo: previous result hi:result coordinate
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valid_coord BSR.S adj_chksum ; adjust high word of D0
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CMP.L A0,D0 ; a copy of D0 was kept in A0
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BEQ.S useD0a ; D0's checksum was OK
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MOVE.W D4,D0 ; revert to default
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useD0a SUB.W D3,D0 ; on vertical pass : move up if previous overflow
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CMP.W #iconSpacer,D0 ; check against minimum
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BLO.S useDefault ; too left/high, use default & no line change
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CMP.W D1,D0
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BLS.S useD0b ; check for overflow
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MOVEQ #iconSize+iconSpacer,D3 ; (vertical spacing) remember the overflow
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useDefault MOVE.W D4,D0
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useD0b MOVE.W D0,D5 ; store left / top
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SWAP D5 ; build the top point
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ADD.W D2,D0 ; add after
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adj_chksum MOVE.L D0,A0 ; fix D0's high byte
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ROL.W #1,D0
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EOR.W #checksumConst,D0
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SWAP D0
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MOVE.W A0,D0
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RTS
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;
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; (11/30/91 FRG) load an ICN#/icl4/icl8 resource
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; on entry : A2 = destination; unchanged
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; D4 = resource type; unchanged
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; D3 = expected length/128 (either or 2,4,8). Is returned multiplied by 128
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; on exit D0 = 0 if OK, and -1 if error; flags are set accordingly
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load_rsrc ASL.W #7,D3 ; D3 *= 128
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SUBQ.L #4,A7 ; _GetResource result
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MOVE.L D4,-(A7) ; type
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MOVE.W iconID(A5),-(A7) ; id
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_GetResource
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MOVE.L (A7)+,D0
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BEQ.S baderr ; nil handle
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MOVE.L D0,A0
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MOVE.L A0,-(SP)
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_LoadResource ; load resource
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MOVE.L (A0),D2
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BEQ.S baderr ; purged handle
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MOVE.L A0,-(A7) ; parameter for _ReleaseResource
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_GetHandleSize
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CMP.L D3,D0
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BLO.S miderr ; not the expected size
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MOVE.L D3,D0 ; len for _BlockMove
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MOVE.L D2,A0 ; src for _BlockMove
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MOVE.L A2,A1 ; dst for _BlockMove
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_BlockMove
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_ReleaseResource
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MOVEQ #0,D0 ; mark OK
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RTS
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miderr _ReleaseResource
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baderr MOVEQ #-1,D0 ; mark err
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RTS
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;
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; try to draw in color; if anything fails, revert to ShowINIT1Bit
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got_mask BTST.B #hasCQDBit,ROM85 ; does CQD exists ?
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BNE.S ShowINIT1Bit ; no, we'll do it one bit
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MOVE.L MainDevice,D5 ; get handle to main device
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BSR.S safe_deref_D5
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MOVE.L gdPMap(A3),D5 ; get its pixmap handle
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BSR.S safe_deref_D5
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MOVE.L #'icl8',D4 ; icl8 as first choice
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CMPI.W #minColorDepth,pmPixelSize(A3) ; test main screen depth
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BLT.S ShowINIT1Bit ; not deep enough for us to draw in color
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BEQ.S is_4bits ; screen is 4 bits deep, first use icl4
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SUBQ.B #4,D4 ; icl8->icl4
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is_4bits LEA buf_iclx(A5),A2 ; storage pointer for load_rsrc
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MOVEQ #1,D5 ; try to load the appropriate iclx, else try the other
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two_times_max MOVEQ #$0C,D3 ; note : high word of D3 is 0 from now on
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EOR.W D3,D4 ; alternates icl4 and icl8
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AND.W D4,D3 ; 4 or 8; after load_rsrc will become 512 or 1024
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BSR.S load_rsrc ; load eiter the icl4 or icl8 (D3 multiplied by 128)
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DBEQ D5,two_times_max
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BEQ.S ShowINITxBit ; found a resource, go draw in color
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;
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; draw the B&W ICN#
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ShowINIT1Bit MOVEQ #srcBic,D0 ; mode for Mask
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BSR.S doCopyBits
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MOVEQ #-128,D0
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ADD.L D0,baseAddr(A4) ; now move myBitMap to the ICON
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MOVEQ #srcOr,D0 ; mode for the ICON
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BSR.S doCopyBits
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BRA.S cleanup ; all done
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;
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; (12/02/91 FRG) checks for handle just loaded in D5; if invalid, revert to ShowINIT1Bit
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; returns the handle in A0, the dereferenced handle in A3 and D0; destroys A1
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safe_deref_D5 MOVE.L (A7)+,A1 ; pop return address, keep flags
|
||
BEQ.S ShowINIT1Bit ; error - nil handle (in D5)
|
||
MOVE.L D5,A0
|
||
MOVE.L (A0),D0
|
||
BEQ.S ShowINIT1Bit ; error - purged handle
|
||
MOVE.L D0,A3
|
||
JMP (A1)
|
||
;
|
||
; (11/30/91 FRG) a subroutine to CopyBits myBitMap to the dstRect in said (D0) mode
|
||
doCopyBits MOVE.L A4,-(A7) ; source bitmap (is myBitMap)
|
||
PEA myPort+portBits(A5) ; dst bitmap
|
||
PEA myBitMap+bounds(A5) ; srcRect
|
||
PEA dstRect(A5) ; dstRect
|
||
MOVE.W D0,-(A7) ; mode
|
||
CLR.L -(A7) ; no clip region
|
||
_CopyBits ; draw it
|
||
RTS
|
||
|
||
; draw on icl4 or icl8; we need to manufacture an offsceen pixmap
|
||
ShowINITxBit SUBQ.L #4,A7
|
||
_NewPixMap ; make a new PixMap
|
||
MOVE.L (A7)+,D5 ; D5 keeps the PixMap till we dispose it
|
||
BSR.S safe_deref_D5
|
||
_HLock ; lock the new PixMap
|
||
; while we point here, prepare the bitMaps/pixMaps for the _CopyMask
|
||
MOVE.L A3,-(A7) ; srcBits (is the new PixMap)
|
||
MOVE.L A4,-(A7) ; maskBits (is myBitMap)
|
||
PEA myPort+portBits(A5) ; dst bitmap
|
||
; now fill in the PixMap fields, in ascending order (so we save code, and won't forget anything)
|
||
MOVE.L A2,(A3)+ ;pmBaseAddr ; address where the icl4/icl8 was _BlockMoved
|
||
MOVE.B #$80,(A3)+ ;pmNewFlag ; mark as new style PixMap
|
||
LSR.W #7-2,D3 ; depth in bit (8 or 4) multiplyed by 4
|
||
MOVE.B D3,(A3)+ ;pmRowBytes+1 ; set Row Width in bytes (either 32 or 16)
|
||
; while we point here, prepare the Rect parameters for the _CopyMask
|
||
MOVE.L A3,-(A7) ; srcRect is pmBounds
|
||
MOVE.L A3,-(A7) ; maskRect is same
|
||
PEA dstRect(A5) ; dstRect
|
||
CLR.L (A3)+ ;pmBounds.topLeft ; set the pmBounds
|
||
MOVE.L D6,(A3)+ ;pmBounds+botRight ; D6 = (iconSize<<16) + iconSize
|
||
CLR.L (A3)+ ;pmVersion/pmPackType ; standard
|
||
CLR.L (A3)+ ;pmPackSize ; standard
|
||
ADDQ.L #pmPixelType-pmHRes,A3 ; let pmHRes & pmVRes unchanged
|
||
LSR.W #2,D3 ; depth in bit (8 or 4)
|
||
MOVE.L D3,(A3)+ ;pmPixelType/pmPixelSize (pmPixelType zeroed=>chunky)
|
||
MOVE.W #1,(A3)+ ;pmCmpCount ; components in pixel, 1 for chunky
|
||
MOVE.W D3,(A3)+ ;pmCmpSize ; same as pmPixelSize
|
||
CLR.L (A3)+ ;pmPlaneBytes ; 0 for chunky
|
||
SUBQ.L #4,A7 ; get the clut appropriate for our depth
|
||
MOVE.L #'clut',-(A7)
|
||
MOVE.W D3,-(A7) ; resource id = either (8 or 4)
|
||
_RGetResource ; hopefully can't fail on a color machine
|
||
MOVE.L (A3),D4 ;pmTable ; keep the original color map around
|
||
MOVE.L (A7)+,(A3)+ ;pmTable ; stuff the ROM clut
|
||
CLR.L (A3) ;pmReserved ; ‘must be set to 0 for future compatibility’
|
||
; now do the much awaited drawing
|
||
_CopyMask ; do the drawing
|
||
; cleanly dispose the PixMap
|
||
MOVE.L D4,-(A3) ;pmTable ; restore the original color map
|
||
MOVE.L D5,-(A7) ; original new PixMap Handle
|
||
_DisposPixMap
|
||
|
||
; about all done
|
||
cleanup _ClosePort ; parameter for this one pushed long ago
|
||
; *** (DBA) I think that QuickDraw leaves handles around. Too bad we can't get rid of them…
|
||
UNLK A5 ; de-allocate our variables - does NOT restore A5
|
||
MOVEM.L (A7)+,savedRegList ; restore standard registers, including A5
|
||
MOVE.L (A7)+,A0 ; pop return address
|
||
ADDA #paramSize,A7 ; discard parameters (optimized into ADDQ.W)
|
||
JMP (A0) ; all done
|
||
;————————————————————————————————————————————————————————————————————————————————————————————————
|
||
; ShowINITCredits
|
||
STRING ASIS
|
||
DC.W 'ShowINIT by Paul Mercer'
|
||
DC.W 'Copyright 1987-1991'
|
||
DC.W 'Version of 12/21/92'
|
||
;————————————————————————————————————————————————————————————————————————————————————————————————
|
||
ENDPROC
|
||
END
|