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(svn r23136) -Change: [NewGRF v8] Deprecate old-style callback results 0xFF??.

release/1.2
frosch 2011-11-08 17:22:19 +00:00
parent 7a3e362763
commit e08a227b53
3 changed files with 7 additions and 6 deletions
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4
src/newgrf.cpp
View File

@ -4240,7 +4240,7 @@ static const SpriteGroup *GetGroupFromGroupID(byte setid, byte type, uint16 grou
{
if (HasBit(groupid, 15)) {
assert(CallbackResultSpriteGroup::CanAllocateItem());
return new CallbackResultSpriteGroup(groupid);
return new CallbackResultSpriteGroup(groupid, _cur.grffile->grf_version >= 8);
}
if (groupid > MAX_SPRITEGROUP || _cur.spritegroups[groupid] == NULL) {
@ -4263,7 +4263,7 @@ static const SpriteGroup *CreateGroupFromGroupID(byte feature, byte setid, byte
{
if (HasBit(spriteid, 15)) {
assert(CallbackResultSpriteGroup::CanAllocateItem());
return new CallbackResultSpriteGroup(spriteid);
return new CallbackResultSpriteGroup(spriteid, _cur.grffile->grf_version >= 8);
}
if (!_cur.IsValidSpriteSet(feature, spriteid)) {

2
src/newgrf_spritegroup.cpp
View File

@ -175,7 +175,7 @@ const SpriteGroup *DeterministicSpriteGroup::Resolve(ResolverObject *object) con
if (this->num_ranges == 0) {
/* nvar == 0 is a special case -- we turn our value into a callback result */
if (value != CALLBACK_FAILED) value = GB(value, 0, 15);
static CallbackResultSpriteGroup nvarzero(0);
static CallbackResultSpriteGroup nvarzero(0, true);
nvarzero.result = value;
return &nvarzero;
}

7
src/newgrf_spritegroup.h
View File

@ -240,14 +240,15 @@ struct CallbackResultSpriteGroup : SpriteGroup {
/**
* Creates a spritegroup representing a callback result
* @param value The value that was used to represent this callback result
* @param grf_version8 True, if we are dealing with a new NewGRF which uses GRF version >= 8.
*/
CallbackResultSpriteGroup(uint16 value) :
CallbackResultSpriteGroup(uint16 value, bool grf_version8) :
SpriteGroup(SGT_CALLBACK),
result(value)
{
/* Old style callback results have the highest byte 0xFF so signify it is a callback result
/* Old style callback results (only valid for version < 8) 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 ((this->result >> 8) == 0xFF) {
if (!grf_version8 && (this->result >> 8) == 0xFF) {
this->result &= ~0xFF00;
} else {
this->result &= ~0x8000;