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(svn r2389) - Feature: [newgrf] Implement the mechanism for handling newgrf callbacks.

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- Feature: [newgrf] Implement the 'refit capacity' callback.
This commit is contained in:
hackykid
2005-06-01 11:34:37 +00:00
parent d1c1a7cba7
commit 351d7aaa9f
5 changed files with 156 additions and 57 deletions
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46
newgrf.c
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@@ -1080,6 +1080,28 @@ ignoring:
#undef FOR_EACH_OBJECT
/**
* Creates a spritegroup representing a callback result
* @param value The value that was used to represent this callback result
* @return A spritegroup representing that callback result
*/
SpriteGroup NewCallBackResult(uint16 value)
{
SpriteGroup group;
group.type = SGT_CALLBACK;
// Old style callback results have the highest byte 0xFF so signify it is a callback result
// New style ones only have the highest bit set (allows 15-bit results, instead of just 8)
if ((value >> 8) == 0xFF)
value &= 0xFF;
else
value &= ~0x8000;
group.g.callback.result = value;
return group;
}
/* Action 0x01 */
static void NewSpriteSet(byte *buf, int len)
@@ -1183,37 +1205,43 @@ static void NewSpriteGroup(byte *buf, int len)
dg->divmod_val = grf_load_byte(&buf);
}
/* (groupid & 0x8000) means this is callback result; we happily
* ignore that for now. */
/* (groupid & 0x8000) means this is callback result. */
dg->num_ranges = grf_load_byte(&buf);
dg->ranges = calloc(dg->num_ranges, sizeof(*dg->ranges));
for (i = 0; i < dg->num_ranges; i++) {
groupid = grf_load_word(&buf);
if (groupid & 0x8000 || groupid >= _cur_grffile->spritegroups_count) {
if (groupid & 0x8000) {
dg->ranges[i].group = NewCallBackResult(groupid);
} else if (groupid >= _cur_grffile->spritegroups_count) {
/* This doesn't exist for us. */
grf_load_word(&buf); // skip range
i--; dg->num_ranges--;
continue;
}
} else {
/* XXX: If multiple surreal sets attach a surreal
* set this way, we are in trouble. */
dg->ranges[i].group = _cur_grffile->spritegroups[groupid];
dg->ranges[i].group = _cur_grffile->spritegroups[groupid];
}
dg->ranges[i].low = grf_load_byte(&buf);
dg->ranges[i].high = grf_load_byte(&buf);
}
groupid = grf_load_word(&buf);
if (groupid & 0x8000 || groupid >= _cur_grffile->spritegroups_count) {
if (groupid & 0x8000) {
dg->default_group = malloc(sizeof(*dg->default_group));
*dg->default_group = NewCallBackResult(groupid);
} else if (groupid >= _cur_grffile->spritegroups_count) {
/* This spritegroup stinks. */
free(dg->ranges), dg->ranges = NULL;
grfmsg(GMS_WARN, "NewSpriteGroup(%02x:0x%x): Default groupid %04x is cargo callback or unknown, ignoring spritegroup.", setid, numloaded, groupid);
return;
} else {
dg->default_group = malloc(sizeof(*dg->default_group));
memcpy(dg->default_group, &_cur_grffile->spritegroups[groupid], sizeof(*dg->default_group));
}
dg->default_group = malloc(sizeof(*dg->default_group));
memcpy(dg->default_group, &_cur_grffile->spritegroups[groupid], sizeof(*dg->default_group));
return;
} else if (numloaded == 0x80 || numloaded == 0x83) {