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Allow computing the combined weight of any proto-palette set

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This commit is contained in:
ISSOtm
2022-03-07 22:44:41 +01:00
committed by Eldred Habert
parent c98d92a4c4
commit fdfedc45a6
1 changed files with 14 additions and 11 deletions
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25
src/gfx/pal_packing.cpp
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@@ -158,13 +158,15 @@ public:
bool empty() const { return std::distance(begin(), end()) == 0; }
private:
static void addUniqueColors(std::unordered_set<uint16_t> &colors, AssignedProtos const &pal) {
for (ProtoPalAttrs const &attrs : pal) {
for (uint16_t color : (*pal._protoPals)[attrs.palIndex]) {
colors.insert(color);
}
template<typename Iter>
static void addUniqueColors(std::unordered_set<uint16_t> &colors, Iter iter, Iter const &end,
std::vector<ProtoPalette> const &protoPals) {
for (; iter != end; ++iter) {
ProtoPalette const &protoPal = protoPals[iter->palIndex];
colors.insert(protoPal.begin(), protoPal.end());
}
}
// This function should stay private because it returns a reference to a unique object
std::unordered_set<uint16_t> &uniqueColors() const {
// We check for *distinct* colors by stuffing them into a `set`; this should be
// faster than "back-checking" on every element (O(n²))
@@ -181,7 +183,7 @@ private:
static std::unordered_set<uint16_t> colors;
colors.clear();
addUniqueColors(colors, *this);
addUniqueColors(colors, begin(), end(), *_protoPals);
return colors;
}
public:
@@ -195,7 +197,6 @@ public:
return colors.size() <= options.maxPalSize();
}
public:
/**
* Computes the "relative size" of a proto-palette on this palette
*/
@@ -217,11 +218,13 @@ public:
}
/**
* Computes the "relative size" of a palette on this one
* Computes the "relative size" of a set of proto-palettes on this palette
*/
double combinedVolume(AssignedProtos const &pal) const {
template<typename Iter>
auto combinedVolume(Iter &&begin, Iter const &end,
std::vector<ProtoPalette> const &protoPals) const {
auto &colors = uniqueColors();
addUniqueColors(colors, pal);
addUniqueColors(colors, std::forward<Iter>(begin), end, protoPals);
return colors.size();
}
};
@@ -271,7 +274,7 @@ static void decant(std::vector<AssignedProtos> &assignments) {
// Decant on palettes
decantOn([](AssignedProtos &to, AssignedProtos &from) {
// If the entire palettes can be merged, move all of `from`'s proto-palettes
if (to.combinedVolume(from) <= options.maxPalSize()) {
if (to.combinedVolume(from.begin(), from.end(), protoPalettes) <= options.maxPalSize()) {
for (ProtoPalAttrs &protoPal : from) {
to.assign(std::move(protoPal));
}