void ctrl_handler(int sig_id)
{
signal(sig_id, SIG_DFL);
LbErrorLog("Failure signal: %s.\n",sigstr(sig_id));
LbScreenReset();
LbErrorLogClose();
raise(sig_id);
}
static LONG CALLBACK ctrl_handler_w32(LPEXCEPTION_POINTERS info)
{
switch (info->ExceptionRecord->ExceptionCode) {
case EXCEPTION_ACCESS_VIOLATION:
switch (info->ExceptionRecord->ExceptionInformation[0])
{
case 0:
LbErrorLog("Attempt to read from inaccessible memory address.\n");
break;
case 1:
LbErrorLog("Attempt to write to inaccessible memory address.\n");
break;
case 8:
LbErrorLog("User-mode data execution prevention (DEP) violation.\n");
break;
default:
LbErrorLog("Memory access voilation, code %d.\n",(int)info->ExceptionRecord->ExceptionInformation[0]);
break;
}
break;
case EXCEPTION_INT_DIVIDE_BY_ZERO:
LbErrorLog("Attempt of integer division by zero.\n");
break;
default:
LbErrorLog("Failure code %x received.\n",info->ExceptionRecord->ExceptionCode);
break;
}
if (!SymInitialize(GetCurrentProcess(), 0, TRUE)) {
LbErrorLog("Failed to init symbol context\n");
}
else {
_backtrace(16 , info->ContextRecord);
SymCleanup(GetCurrentProcess());
}
LbScreenReset();
LbErrorLogClose();
return EXCEPTION_EXECUTE_HANDLER;
}
short setup_screen_mode_minimal(unsigned short nmode)
{
unsigned int flg_mem;
TbScreenModeInfo *mdinfo;
SYNCDBG(4,"Setting up mode %d",(int)nmode);
if (!force_video_mode_reset)
{
if ((nmode == lbDisplay.ScreenMode) && (MinimalResolutionSetup))
return 1;
}
flg_mem = lbDisplay.DrawFlags;
if (LbGraphicsScreenHeight() < 200)
{
WARNLOG("Unhandled previous Screen Mode %d, Reset skipped",(int)lbDisplay.ScreenMode);
} else
if (LbGraphicsScreenHeight() < 400)
{
if (MinimalResolutionSetup)
{
if ((nmode != lbDisplay.ScreenMode) || (force_video_mode_reset))
LbScreenReset();
LbDataFreeAll(mcga_load_files_minimal);
MinimalResolutionSetup = 0;
} else
{
reset_eye_lenses();
reset_heap_manager();
reset_heap_memory();
set_pointer_graphic_none();
unload_pointer_file(0);
if ((nmode != lbDisplay.ScreenMode) || (force_video_mode_reset))
LbScreenReset();
LbDataFreeAll(mcga_load_files);
}
} else
{
if (MinimalResolutionSetup)
{
set_pointer_graphic_none();
unload_pointer_file(1);
if ((nmode != lbDisplay.ScreenMode) || (force_video_mode_reset))
LbScreenReset();
LbDataFreeAll(vres256_load_files_minimal);
MinimalResolutionSetup = 0;
} else
{
reset_eye_lenses();
reset_heap_manager();
reset_heap_memory();
if ((nmode != lbDisplay.ScreenMode) || (force_video_mode_reset))
LbScreenReset();
LbDataFreeAll(vres256_load_files);
}
}
mdinfo = LbScreenGetModeInfo(nmode);
if (mdinfo->Height < 200)
{
ERRORLOG("Unhandled Screen Mode %d, setup failed",(int)nmode);
force_video_mode_reset = true;
return 0;
} else
if (mdinfo->Height < 400)
{
SYNCDBG(17,"Preparing minimal low resolution mode");
MinimalResolutionSetup = 1;
if ( !LoadMcgaDataMinimal() )
{
ERRORLOG("Unable to load minimal MCGA files");
return 0;
}
if ((nmode != lbDisplay.ScreenMode) || (force_video_mode_reset))
{
if (LbScreenSetup((TbScreenMode)nmode, mdinfo->Width, mdinfo->Height, engine_palette, 2, 0) != 1)
{
ERRORLOG("Unable to setup screen resolution %s (mode %d)",
mdinfo->Desc,(int)nmode);
force_video_mode_reset = true;
return 0;
}
}
} else
{
SYNCDBG(17,"Preparing minimal high resolution mode");
MinimalResolutionSetup = 1;
frontend_load_data_from_cd();
if ( LbDataLoadAll(vres256_load_files_minimal) )
{
ERRORLOG("Unable to load vres256_load_files_minimal files");
force_video_mode_reset = true;
return 0;
}
frontend_load_data_reset();
if ((nmode != lbDisplay.ScreenMode) || (force_video_mode_reset))
{
if (LbScreenSetup((TbScreenMode)nmode, mdinfo->Width, mdinfo->Height, engine_palette, 1, 0) != 1)
{
ERRORLOG("Unable to setup screen resolution %s (mode %d)",
mdinfo->Desc,(int)nmode);
force_video_mode_reset = true;
return 0;
}
}
}
LbScreenClear(0);
LbScreenSwap();
update_screen_mode_data(mdinfo->Width, mdinfo->Height);
lbDisplay.DrawFlags = flg_mem;
force_video_mode_reset = false;
return 1;
}
TbBool setup_screen_mode(unsigned short nmode)
{
TbScreenModeInfo *mdinfo;
unsigned int flg_mem;
long lens_mem;
short was_minimal_res;
SYNCDBG(4,"Setting up mode %d",(int)nmode);
if (!force_video_mode_reset)
{
if ((nmode == lbDisplay.ScreenMode) && (!MinimalResolutionSetup))
{
SYNCDBG(6,"Mode %d already active, no changes.",(int)nmode);
return true;
}
}
lens_mem = game.numfield_1B;
flg_mem = lbDisplay.DrawFlags;
was_minimal_res = (MinimalResolutionSetup || force_video_mode_reset);
set_pointer_graphic_none();
if (LbGraphicsScreenHeight() < 200)
{
WARNLOG("Unhandled previous Screen Mode %d, Reset skipped",(int)lbDisplay.ScreenMode);
} else
if (LbGraphicsScreenHeight() < 400)
{
if (MinimalResolutionSetup)
{
if (lbDisplay.ScreenMode != nmode)
LbScreenReset();
LbDataFreeAll(mcga_load_files_minimal);
ERRORLOG("MCGA Minimal not allowed (Reset)");
MinimalResolutionSetup = 0;
} else
{
reset_eye_lenses();
reset_heap_manager();
reset_heap_memory();
set_pointer_graphic_none();
unload_pointer_file(0);
if (lbDisplay.ScreenMode != nmode)
LbScreenReset();
LbDataFreeAll(mcga_load_files);
}
} else
// so (LbGraphicsScreenHeight() >= 400)
{
if (MinimalResolutionSetup)
{
if ((lbDisplay.ScreenMode != nmode) || (MinimalResolutionSetup))
LbScreenReset();
LbDataFreeAll(vres256_load_files_minimal);
MinimalResolutionSetup = 0;
} else
{
reset_eye_lenses();
reset_heap_manager();
reset_heap_memory();
set_pointer_graphic_none();
unload_pointer_file(1);
if ((lbDisplay.ScreenMode != nmode) || (MinimalResolutionSetup))
LbScreenReset();
LbDataFreeAll(vres256_load_files);
}
}
mdinfo = LbScreenGetModeInfo(nmode);
if (mdinfo->Height < 200)
{
ERRORLOG("Unhandled Screen Mode %d, setup failed",(int)nmode);
force_video_mode_reset = true;
return false;
} else
if (mdinfo->Height < 400)
{
SYNCDBG(6,"Entering low-res mode %d, resolution %dx%d.",(int)nmode,(int)mdinfo->Width,(int)mdinfo->Height);
if (!LoadMcgaData())
{
ERRORLOG("Loading Mcga files failed");
force_video_mode_reset = true;
return false;
}
if ((lbDisplay.ScreenMode != nmode) || (was_minimal_res))
{
if (LbScreenSetup((TbScreenMode)nmode, mdinfo->Width, mdinfo->Height, engine_palette, 2, 0) != 1)
{
ERRORLOG("Unable to setup screen resolution %s (mode %d)",
mdinfo->Desc,(int)nmode);
force_video_mode_reset = true;
return false;
}
}
load_pointer_file(0);
} else
// so (mdinfo->Height >= 400)
{
SYNCDBG(6,"Entering hi-res mode %d, resolution %dx%d.",(int)nmode,(int)mdinfo->Width,(int)mdinfo->Height);
if (!LoadVRes256Data((long)mdinfo->Width*(long)mdinfo->Height))
{
ERRORLOG("Unable to load VRes256 data files");
force_video_mode_reset = true;
return false;
}
if ((lbDisplay.ScreenMode != nmode) || (was_minimal_res))
{
if (LbScreenSetup((TbScreenMode)nmode, mdinfo->Width, mdinfo->Height, engine_palette, 1, 0) != 1)
{
ERRORLOG("Unable to setup screen resolution %s (mode %d)",
mdinfo->Desc,(int)nmode);
force_video_mode_reset = true;
return false;
}
}
load_pointer_file(1);
}
LbScreenClear(0);
LbScreenSwap();
update_screen_mode_data(mdinfo->Width, mdinfo->Height);
if (parchment_loaded)
reload_parchment_file(mdinfo->Width >= 640);
reinitialise_eye_lens(lens_mem);
LbMouseSetPosition((MyScreenWidth/pixel_size) >> 1, (MyScreenHeight/pixel_size) >> 1);
lbDisplay.DrawFlags = flg_mem;
if (!setup_heap_memory())
{
force_video_mode_reset = true;
return false;
}
setup_heap_manager();
game.numfield_C &= ~0x0004;
force_video_mode_reset = false;
SYNCDBG(8,"Finished");
return true;
}
