author Sam Lantinga <>
Thu, 11 May 2006 03:45:55 +0000
changeset 1812 9c882e94b545
parent 1420 2405517b5eab
child 2028 6dbe2a67b23b
child 3850 28db418c7573
permissions -rw-r--r--
Fixed bug #208

So, here's a patch with a reimplementation of QZ_SetIcon() that does what I
described above. I apologize for the delay, I've been quite busy in the last
few days.

It appears to work here on 10.4.5 PPC in the limited testing that I've done;
I'll try to test it on 10.3.9 and 10.2.8 as well, but that might take another
week or so. Please test on i386.

Regarding alpha channels, per-surface alpha, and color keys, the same semantics
as for regular blits to an RGB surface should apply (for the final icon
composited onto the dock), unless I made a mistake - except in one pathological
case: if the icon surface has an alpha channel, its SDL_SRCALPHA flag is not
set (i.e. it has been explicitly cleared, since it's on by default for RGBA
surfaces), and it has a color key, plus an explicit mask was specified (instead
of the one autogenerated from the colorkey), then the color-keyed areas appear
black instead of transparent. I found no elegant way of fixing this, was too
lazy to implement the inelegant one, and decided that it isn't worth the effort
(but if someone disagrees, I can do it).
     1 ==============================================================================
     2 Using the Simple DirectMedia Layer on Atari
     3 ==============================================================================
     6     If you want to build SDL from sources to create SDL programs on Atari:
     7         see sections I - II.
     9     If you want to create SDL programs on Atari using SDL binary build,
    10         download it from my web site (URL at end of this file).
    12     If you want to configure a program using SDL on Atari,
    13 	    see sections IV - VI.
    16 ==============================================================================
    17 I.  Building the Simple DirectMedia Layer libraries:
    18     (This step isn't necessary if you have the SDL binary distribution)
    20   Do the classic configure, with --disable-shared --enable-static and:
    22     Tos version (should run everywhere):
    23       --disable-threads
    24     Tos does not support threads.
    26     MiNT version (maybe Magic, only for multitasking OS):
    27       --disable-pthreads --enable-pth
    28     Mint and Magic may supports threads, so audio can be used with current
    29     devices, like Sun audio, or disk-writing support. Like Tos, interrupt
    30     audio without threads is more suited for Atari machines.
    32   Then you can make ; make install it.
    34 ==============================================================================
    35 II. Building the Simple DirectMedia Layer test programs:
    37   Do the classic configure, then make.
    39   Run them !
    41 ==============================================================================
    42 III.  Enjoy! :)
    44   If you have a project you'd like me to know about, or want to ask questions,
    45   go ahead and join the SDL developer's mailing list by sending e-mail to:
    49   and put "subscribe" into the subject of the message. Or alternatively you
    50   can use the web interface:
    54 ==============================================================================
    55 IV.  What is supported:
    57 Keyboard (GEMDOS, BIOS, GEM, Ikbd)
    58 Mouse (XBIOS, GEM, Ikbd, /dev/mouse (non working atm, disabled))
    59 Video (XBIOS (Fullscreen), GEM (Windowed and Fullscreen))
    60 Timer (VBL vector, GNU pth library)
    61 Joysticks and joypads (Ikbd, Hardware)
    62 Audio (Hardware, XBIOS, GSXB, MCSN, STFA, /dev/audio if threads enabled)
    63 Threads (Multitasking OS only via GNU pth library)
    64 Shared object loader (using LDG library from
    65 Audio CD (MetaDOS)
    66 OpenGL (using Mesa offscreen rendering driver)
    68 - Dependent driver combinations:
    69 Video   Kbd     Mouse   Timer   Joysticks
    70 xbios   ikbd    ikbd    vbl(2)  ikbd
    71 xbios   gemdos  xbios   vbl(2)  xbios(3)
    72 xbios   bios    xbios   vbl(2)  xbios(3)
    73 gem     gem     gem(1)  vbl(2)  xbios(3)
    75 Audio   O/S     Misc
    76 dma8    All     Uses MFP Timer A interrupt
    77 xbios	TOS     Uses MFP Timer A interrupt
    78 xbios   MiNT    Uses MiNT thread
    79 xbios   Magic   Disabled
    80 stfa    All     Uses MFP interrupt
    81 mcsn	TOS     Uses MFP Timer A interrupt
    82 mcsn    MiNT    Uses MiNT thread
    83 mcsn    Magic   Disabled
    84 gsxb    All     Uses GSXB callback
    86 Joypad driver always uses hardware access.
    87 OpenGL driver always uses OSMesa.
    89 (1) GEM does not report relative mouse motion, so xbios mouse driver is used
    90 to report this type event. Under MiNT, using XBIOS mouse driver is not possible.
    91 A preliminary driver for /dev/mouse device driver is present, but is disabled
    92 till it can be used with other applications simultaneously.
    94 (2) If you build SDL with threads using the GNU pth library, timers are
    95 supported via the pth library.
    97 (3) Redirecting XBIOS vectors does not work under MiNT, so it is disabled in
    98 this case.
   100 ==============================================================================
   101 V.  Environment variables:
   104 	Set to 'xbios' to force xbios video driver
   105 	Set to 'gem' to force gem video driver
   108 	Set to filename to load as OpenGL library, if you use SDL_GL_LoadLibrary()
   111 	Set to 'mint_gsxb' to force Atari GSXB audio driver
   112 	Set to 'mint_mcsn' to force Atari MCSN audio driver
   113 	Set to 'mint_stfa' to force Atari STFA audio driver
   114 	Set to 'mint_xbios' to force Atari Xbios audio driver
   115 	Set to 'mint_dma8' to force Atari 8 bits DMA audio driver
   116 	Set to 'audio' to force Sun /dev/audio audio driver
   117 	Set to 'disk' to force disk-writing audio driver
   120 	Set to 'ikbd' to force IKBD 6301 keyboard driver
   121 	Set to 'gemdos' to force gemdos keyboard driver
   122 	Set to 'bios' to force bios keyboard driver
   125 	Use any of these strings in the environment variable to enable or
   126 	disable a joystick:
   128 	'ikbd-joy1-[on|off]' for IKBD joystick on port 1 (hardware access)
   129 	'xbios-joy1-[on|off]' for IKBD joystick on port 1 (xbios access)
   130 	'porta-pad-[on|off]' for joypad on port A
   131 	'porta-joy0-[on|off]' for joystick 0 on port A
   132 	'porta-joy1-[on|off]' for joystick 1 on port A
   133 	'porta-lp-[on|off]' for lightpen on port A
   134 	'porta-anpad-[on|off]' for analog paddle on port A
   135 	'portb-pad-[on|off]' for joypad on port B
   136 	'portb-joy0-[on|off]' for joystick 0 on port B
   137 	'portb-joy1-[on|off]' for joystick 1 on port B
   138 	'portb-anpad-[on|off]' for analog paddle on port B
   140 	Default configuration is:
   141 		'ikbd-joy1-on' (if IKBD events driver enabled)
   142 		'xbios-joy1-on' (if gemdos/bios/gem events driver enabled)
   143 		'porta-pad-on portb-pad-on' (if available on the machine)
   145 	port[a|b]-[pad|joy?|lp|anpad]-* strings are mutually exclusives.
   146 	On such a port, you can only use a joypad OR 1 or 2 joysticks OR
   147 	a lightpen OR an analog paddle. You must disable joypad before
   148 	setting another controller.
   150 	The second joystick port on IKBD is used by the mouse, so not usable.
   151 	Another problem with the IKBD: mouse buttons and joystick fire buttons
   152 	are wired together at the hardware level, it means:
   153 		port 0                port 0           port 1
   154 		mouse left button  = joystick fire 0 = joystick fire 1
   155 		mouse right button = joystick fire 1 = joystick fire 0
   157 	Descriptions of joysticks/joypads:
   158 	- Joypads: 1 hat, 17 buttons (Atari Jaguar console-like).
   159 	- Joysticks: 1 hat, 1 button.
   160 	- Lightpen, analog paddles: 2 axis, 2 buttons. The 2 buttons are those
   161 	  affected to 1 button joysticks on the same port.
   163 ==============================================================================
   164 VI.  More informations about drivers:
   166 OpenGL:
   167 	The default is to use the Mesa offscreen driver (osmesa.ldg). If you want
   168 	to use an older OpenGL implementation, like mesa_gl.ldg or tiny_gl.ldg,
   169 	your program must use SDL_GL_LoadLibrary() to do so, and retrieve the
   170 	needed function pointers with SDL_LoadFunction(). In all cases, the OpenGL
   171 	context is taken care of by SDL itself, you just have to use gl* functions.
   173 	However, there is one OpenGL call that has a different prototype in the old
   174 	implementations: glOrtho(). In the old implementations, it has 6 float as
   175 	parameters, in the standard one, it has 6 double parameters. If you want
   176 	to compile testdyngl, or any other SDL program that loads its OpenGL
   177 	library, you must change the glOrtho() prototype used in this program. In
   178 	osmesa.ldg, you can retrieve a glOrtho() with double parameters, by
   179 	searching for the function "glOrtho6d".
   181 Xbios video:
   182 	Video chip is detected using the _VDO cookie.
   183 	Screen enhancers are not supported, but could be if you know how to
   184 	use them.
   186 	ST, STE, Mega ST, Mega STE:
   187 		320x200x4 bits, shades of grey, available only for the purpose
   188 		of testing SDL.
   189 	TT:
   190 		320x480x8 and 320x240x8 (software double-lined mode).
   191 	Falcon:
   192 		All modes supported by the current monitor (RVB or VGA).
   193 		BlowUp and Centscreen extended modes, ScreenBlaster 3 current mode.
   194 	Clones and any machine with monochrome monitor:
   195 		Not supported.
   197 Gem video:
   198 	Automatically used if xbios not available.
   200 	All machines:
   201 		Only the current resolution, if 8 bits or higher depth.
   203 IKBD keyboard, mouse and joystick driver:
   204 	Available if _MCH cookie is ST, Mega ST, STE, Mega STE, TT or Falcon.
   206 	Hades has an IKBD, but xbios is not available for video, so IKBD
   207 	driver is disabled.
   209 Gemdos and bios keyboard driver:
   210 	Available on all machines.
   212 Mouse and joystick xbios driver:
   213 	Available on all machines (I think).
   215 Joypad driver:
   216 	Available if _MCH cookie is STE or Falcon.
   218 PTH timer driver:
   219 	Available with multitasking OS.
   221 VBL timer driver:
   222 	Available on all machines (I think).
   224 Audio drivers:
   225 	Cookies _SND, MCSN, STFA and GSXB used to detect supported audio
   226 	capabilities.
   228 	STE, Mega STE, TT:
   229 		8 bits DMA (hardware access)
   230 		STFA, MCSN or GSXB driver if installed
   231 	Falcon:
   232 		8 bits DMA (hardware access)
   233 		Xbios functions
   234 		STFA, MCSN or GSXB driver if installed
   235 	Other machines:
   236 		STFA, MCSN or GSXB driver if installed
   238 	STFA driver:
   240 	GSXB driver:
   242 	MacSound driver:
   244 	MagicSound driver (MCSN,GSXB compatible):
   246 	X-Sound driver (GSXB compatible):
   249 -- 
   250 Patrice Mandin <>