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authorrubidium <rubidium@openttd.org>2007-09-16 21:34:50 +0000
committerrubidium <rubidium@openttd.org>2007-09-16 21:34:50 +0000
commitf3491cb062a5854b6a8c713520c6af3ca2b36335 (patch)
tree875e7acc3bdd8d5dd254b1aa2eb37417e4f18f18 /src
parent9da9e77641b81b91bd6facd0f889b6ce906a7b40 (diff)
downloadopenttd-f3491cb062a5854b6a8c713520c6af3ca2b36335.tar.xz
(svn r11121) -Fix: clear the temporary NewGRF storage every time we perform a callback so it cannot cause desyncs.
Diffstat (limited to 'src')
-rw-r--r--src/newgrf_spritegroup.cpp15
-rw-r--r--src/newgrf_spritegroup.h2
2 files changed, 10 insertions, 7 deletions
diff --git a/src/newgrf_spritegroup.cpp b/src/newgrf_spritegroup.cpp
index 69f6ee60e..53c655c55 100644
--- a/src/newgrf_spritegroup.cpp
+++ b/src/newgrf_spritegroup.cpp
@@ -162,7 +162,7 @@ static inline const SpriteGroup *ResolveVariable(const SpriteGroup *group, Resol
bool available = true;
if (adjust->variable == 0x7E) {
ResolverObject subobject = *object;
- const SpriteGroup *subgroup = Resolve(adjust->subroutine, &subobject);
+ const SpriteGroup *subgroup = Resolve(adjust->subroutine, &subobject, false);
if (subgroup == NULL || subgroup->type != SGT_CALLBACK) {
value = CALLBACK_FAILED;
} else {
@@ -175,7 +175,7 @@ static inline const SpriteGroup *ResolveVariable(const SpriteGroup *group, Resol
if (!available) {
/* Unsupported property: skip further processing and return either
* the group from the first range or the default group. */
- return Resolve(group->g.determ.num_ranges > 0 ? group->g.determ.ranges[0].group : group->g.determ.default_group, object);
+ return Resolve(group->g.determ.num_ranges > 0 ? group->g.determ.ranges[0].group : group->g.determ.default_group, object, false);
}
switch (group->g.determ.size) {
@@ -198,11 +198,11 @@ static inline const SpriteGroup *ResolveVariable(const SpriteGroup *group, Resol
for (i = 0; i < group->g.determ.num_ranges; i++) {
if (group->g.determ.ranges[i].low <= value && value <= group->g.determ.ranges[i].high) {
- return Resolve(group->g.determ.ranges[i].group, object);
+ return Resolve(group->g.determ.ranges[i].group, object, false);
}
}
- return Resolve(group->g.determ.default_group, object);
+ return Resolve(group->g.determ.default_group, object, false);
}
@@ -236,16 +236,19 @@ static inline const SpriteGroup *ResolveRandom(const SpriteGroup *group, Resolve
mask = (group->g.random.num_groups - 1) << group->g.random.lowest_randbit;
index = (object->GetRandomBits(object) & mask) >> group->g.random.lowest_randbit;
- return Resolve(group->g.random.groups[index], object);
+ return Resolve(group->g.random.groups[index], object, false);
}
/* ResolverObject (re)entry point */
-const SpriteGroup *Resolve(const SpriteGroup *group, ResolverObject *object)
+const SpriteGroup *Resolve(const SpriteGroup *group, ResolverObject *object, bool first_call)
{
/* We're called even if there is no group, so quietly return nothing */
if (group == NULL) return NULL;
+ /* Zero the temporary storage to make sure there are no desyncs */
+ if (first_call) memset(_temp_store, 0, sizeof(_temp_store));
+
switch (group->type) {
case SGT_REAL: return object->ResolveReal(object, group);
case SGT_DETERMINISTIC: return ResolveVariable(group, object);
diff --git a/src/newgrf_spritegroup.h b/src/newgrf_spritegroup.h
index e91846097..f1b17cbbe 100644
--- a/src/newgrf_spritegroup.h
+++ b/src/newgrf_spritegroup.h
@@ -243,7 +243,7 @@ struct ResolverObject {
/* Base sprite group resolver */
-const SpriteGroup *Resolve(const SpriteGroup *group, ResolverObject *object);
+const SpriteGroup *Resolve(const SpriteGroup *group, ResolverObject *object, bool first_call = true);
#endif /* NEWGRF_SPRITEGROUP_H */