drinkingtea/nostalgia
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[nostalgia/core/gba] Cleanup

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This commit is contained in:
Gary Talent 2023-12-23 01:50:26 -06:00
parent 2bad4ee416
commit 978f2f9c4f
1 changed files with 5 additions and 8 deletions
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13
src/nostalgia/modules/core/src/gba/gfx.cpp
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@ -96,31 +96,28 @@ constexpr ox::Error model(auto *io, ox::CommonPtrWith<GbaTileMapTarget> auto *t)
// cannot be seriously optimized without preloading TileSheets.
size_t sectionIdx = 0;
if (t->targetBpp == t->bpp) {
TileSheetSetEntrySection const*section = &t->setEntry->sections[0];
size_t writeIt = 0;
uint16_t intermediate = 0;
size_t const fourBpp = t->bpp == 4;
const auto handleTileMap = [t, &intermediate, &section, &sectionIdx, &writeIt, fourBpp]
const auto handleTileMap = [t, &intermediate, &sectionIdx, fourBpp]
(std::size_t i, uint8_t const*tile) {
auto const tileIdx = static_cast<int>((i * (2 * fourBpp)) / PixelsPerTile);
if (!loadPixel(*t->setEntry, sectionIdx, tileIdx)) {
return ox::Error{};
}
if (writeIt & 1) { // i is odd
if (i & 1) { // i is odd
intermediate |= static_cast<uint16_t>(*tile) << 8;
t->tileMap[writeIt / 2] = intermediate;
t->tileMap[t->tileWriteIdx] = intermediate;
++t->tileWriteIdx;
} else { // i is even
intermediate = *tile & 0x00ff;
}
++writeIt;
return ox::Error{};
};
out = io->template field<uint8_t, decltype(handleTileMap)>("tileMap", handleTileMap);
} else if (t->targetBpp > t->bpp) { // 4 -> 8 bits
const auto handleTileMap = [t, &sectionIdx](std::size_t writeIt, uint8_t const*tile) {
const auto handleTileMap = [t, &sectionIdx](std::size_t i, uint8_t const*tile) {
auto constexpr BytesPerTile4Bpp = 32;
auto const tileIdx = static_cast<int>(writeIt / BytesPerTile4Bpp);
auto const tileIdx = static_cast<int>(i / BytesPerTile4Bpp);
if (!loadPixel(*t->setEntry, sectionIdx, tileIdx)) {
return ox::Error{};
}