Opened 14 years ago
Closed 14 years ago
#5289 closed defect (fixed)
QFG1 EGA: priority/control/view functions crash, debug mode
| Reported by: | SF/jestar_jokin | Owned by: | bluegr |
|---|---|---|---|
| Priority: | normal | Component: | Engine: SCI |
| Version: | Keywords: | script | |
| Cc: | Game: | Quest for Glory 1 |
Description
At any point in the game, type "razzle dazzle root beer" to activate the built-in debug mode. Pressing ALT-P, ALT-C, or ALT-V will cause the game to crash with the following error message:
WARNING: Dummy function kDummy[9] invoked. Params: 1 (0000:0002)! Kernel function was called, which was considered to be unused - see log for details!
The params change depending on the function: ALT-P: 0000:0002 ALT-C: 0000:0003 ALT-V: 0000:0001
Correct functionality:: ALT-P: display z-priority view ALT-C: display control view ALT-V: display normal view
In addition, ALT-S functionality is missing, as it is overridden by ScummVM's screenshot capability. ALT-S is supposed to cycle through the actors/sprites on the screen, similar to the working ALT-E functionality (which only displays information on the "ego" sprite).
I believe this issue will also affect QFG2 (using debug command "suck blue frog").
Ticket imported from: #3050616. Ticket imported from: bugs/5289.
Attachments (3)
Change History (9)
by , 14 years ago
comment:2 by , 14 years ago
We know
Debug mode in SCI games uses extra kernel functions, which we haven't implemented - namely, the "Show" kernel command, along with others, which is used to show the priority/control/visual maps in games. We have a much better debugger (Control-D, type "help"), which is why we considered to not implement these at all (kShow is very straightforward, the others aren't). Implementing kShow would be very easy, but I'm unsure of the real benefits, since we got the same "show" command in our debugger.
In any case, if you want the functionality of showing the priority/control/visual map through the SCI debugger, it should be very easy to do (though you can do it from ScummVM's debug console, as mentioned already), however, any additional support for the original SCI debugger is pointless, since ScummVM's debugger is vastly superior to Sierra's
comment:3 by , 14 years ago
As for Alt-S: it is pointless, the SV utility does a much better job - it can show all game resources in a nice GUI (this is what we use), so we won't do it.
What kind of sprite information does Alt-E show?
comment:4 by , 14 years ago
ALT-S just shows X, Y, loop, cel, and priority information, next to a picture of each sprite. Nothing especially interesting.
Seeing as ScummVM has a better debugger, it is possible to silently fail when calling the kernel functions, perhaps as a SCI script workaround?
If implementing the Show functions is easy, I may try creating a patch in the future, though I understand this is hardly a high priority.
comment:5 by , 14 years ago
Implemented kShow in rev #52281, so the alt-p/v/c functionality works now. We probably won't do any other debug related kernel function though, since there are far better tools for this nowadays (plus ScummVM's own debugger)
comment:6 by , 14 years ago
| Owner: | set to |
|---|---|
| Resolution: | → fixed |
| Status: | new → closed |
Game start, debug mode already activated