Mercurial > sdl-ios-xcode
view src/video/riscos/SDL_riscosASM.S @ 1812:9c882e94b545
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).
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 11 May 2006 03:45:55 +0000 (2006-05-11) |
| parents | 1e8582152d44 |
| children | 99210400e8b9 |
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; ; SDL - Simple DirectMedia Layer ; Copyright (C) 1997-2004 Sam Lantinga ; ; This library is free software; you can redistribute it and/or ; modify it under the terms of the GNU Library General Public ; License as published by the Free Software Foundation; either ; version 2 of the License, or (at your option) any later version. ; ; This library is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ; Library General Public License for more details. ; ; You should have received a copy of the GNU Library General Public ; License along with this library; if not, write to the Free ; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ; ; Sam Lantinga ; slouken@libsdl.org ; ; Assembler routines for RISC OS display ; AREA |C$$CODE| EXPORT |RISCOS_Put32| ; Display 32bpp to 32bpp, 1:1 ; ; Code provided by Adrain Lees ; ; entry a1 -> destination ; a2 = dest width in pixels ; a3 = dest line length in bytes ; a4 = dest height in scanlines ; arg5 -> source ; arg6 = byte offset from end of source line to start of next Arg5 * 10*4 Arg6 * Arg5+4 RISCOS_Put32 ROUT STMFD sp!,{a2,v1-v6,sl,fp,lr} LDR ip,[sp,#Arg5] MOV lr,a1 B ucp64lp 00 ;tail strip of 1-15 pixels LDR v1,[ip],#4 01 SUBS a2,a2,#1 STR v1,[lr],#4 LDRHI v1,[ip],#4 BHI %01 B %02 ucp64end ADDS a2,a2,#16 BNE %00 02 SUBS a4,a4,#1 ;height-- LDRHI v1,[sp,#Arg6] LDRHI a2,[sp] ;reload width BLS %03 ;move to start of next scanline ADD lr,a1,a3 ADD a1,a1,a3 ADD ip,ip,v1 ucp64lp SUBS a2,a2,#16 BLO ucp64end PLD [ip,#64] LDR v1,[ip],#4 LDR v2,[ip],#4 LDR v3,[ip],#4 LDR v4,[ip],#4 LDR v5,[ip],#4 LDR v6,[ip],#4 LDR sl,[ip],#4 LDR fp,[ip],#4 STR v1,[lr],#4 STR v2,[lr],#4 STR v3,[lr],#4 STR v4,[lr],#4 STR v5,[lr],#4 STR v6,[lr],#4 STR sl,[lr],#4 STR fp,[lr],#4 PLD [ip,#64] LDR v1,[ip],#4 LDR v2,[ip],#4 LDR v3,[ip],#4 LDR v4,[ip],#4 LDR v5,[ip],#4 LDR v6,[ip],#4 LDR sl,[ip],#4 LDR fp,[ip],#4 STR v1,[lr],#4 STR v2,[lr],#4 STR v3,[lr],#4 STR v4,[lr],#4 STR v5,[lr],#4 STR v6,[lr],#4 STR sl,[lr],#4 STR fp,[lr],#4 B ucp64lp 03 LDMFD sp!,{a2,v1-v6,sl,fp,pc}