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VarAction2: Remove trivially resolvable deterministic sprite groups

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This commit is contained in:
Jonathan G Rennison
2022-05-25 20:29:18 +01:00
parent 3b5eede3fc
commit 74e1a40f7c
2 changed files with 21 additions and 8 deletions
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21
src/newgrf.cpp
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@@ -5492,7 +5492,26 @@ static const SpriteGroup *GetGroupFromGroupID(byte setid, byte type, uint16 grou
return nullptr;
}
return _cur.spritegroups[groupid];
const SpriteGroup *result = _cur.spritegroups[groupid];
while (result != nullptr) {
if (result->type == SGT_DETERMINISTIC) {
const DeterministicSpriteGroup *sg = static_cast<const DeterministicSpriteGroup *>(result);
if (sg->adjusts.size() == 1 && sg->adjusts[0].variable == 0x1A) {
/* Deterministic sprite group can be trivially resolved, skip it */
uint32 value = EvaluateDeterministicSpriteGroupAdjust(sg->size, sg->adjusts[0], nullptr, 0, UINT_MAX);
result = sg->default_group;
for (const auto &range : sg->ranges) {
if (range.low <= value && value <= range.high) {
result = range.group;
break;
}
}
continue;
}
}
break;
}
return result;
}
/**

8
src/newgrf_spritegroup.cpp
View File

@@ -282,13 +282,7 @@ void DeterministicSpriteGroup::AnalyseCallbacks(AnalyseCallbackOperation &op) co
auto check_1A_range = [&]() -> bool {
if (this->adjusts.size() == 1 && this->adjusts[0].variable == 0x1A) {
/* Not clear why some GRFs do this, perhaps a way of commenting out a branch */
uint32 value = 0;
switch (this->size) {
case DSG_SIZE_BYTE: value = EvalAdjustT<uint8, int8> (this->adjusts[0], nullptr, 0, UINT_MAX); break;
case DSG_SIZE_WORD: value = EvalAdjustT<uint16, int16>(this->adjusts[0], nullptr, 0, UINT_MAX); break;
case DSG_SIZE_DWORD: value = EvalAdjustT<uint32, int32>(this->adjusts[0], nullptr, 0, UINT_MAX); break;
default: NOT_REACHED();
}
uint32 value = EvaluateDeterministicSpriteGroupAdjust(this->size, this->adjusts[0], nullptr, 0, UINT_MAX);
for (const auto &range : this->ranges) {
if (range.low <= value && value <= range.high) {
if (range.group != nullptr) range.group->AnalyseCallbacks(op);