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[nostalgia/core/gba] Add hideSprite and add flipX parameter to setSrpite

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This commit is contained in:
Gary Talent
2020-07-28 19:09:24 -05:00
parent 4ad959cd74
commit 80f98802b6
4 changed files with 31 additions and 5 deletions
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src/nostalgia/core/gba/gfx.cpp
+22 -1
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@@ -214,12 +214,33 @@ void clearTileLayer(Context*, int layer) {
memset(&MEM_BG_MAP[layer], 0, GbaTileRows * GbaTileColumns);
}
void setSprite(unsigned idx, unsigned x, unsigned y, unsigned tileIdx, unsigned spriteShape, unsigned spriteSize) {
void hideSprite(unsigned idx) {
GbaSpriteAttrUpdate oa;
oa.attr0 = 2 << 8;
oa.idx = idx;
// block until g_spriteUpdates is less than buffer len
if (g_spriteUpdates >= config::GbaSpriteBufferLen) {
nostalgia_core_vblankintrwait();
}
if constexpr(config::GbaEventLoopTimerBased) {
REG_IE &= ~Int_vblank; // disable vblank interrupt handler
g_spriteBuffer[g_spriteUpdates++] = oa;
REG_IE |= Int_vblank; // enable vblank interrupt handler
} else {
auto ie = REG_IE; // disable vblank interrupt handler
REG_IE &= ~Int_vblank; // disable vblank interrupt handler
g_spriteBuffer[g_spriteUpdates++] = oa;
REG_IE = ie; // enable vblank interrupt handler
}
}
void setSprite(unsigned idx, unsigned x, unsigned y, unsigned tileIdx, unsigned spriteShape, unsigned spriteSize, unsigned flipX) {
GbaSpriteAttrUpdate oa;
oa.attr0 = static_cast<uint16_t>(y & ox::onMask<uint8_t>(7))
| (static_cast<uint16_t>(1) << 10) // enable alpha
| (static_cast<uint16_t>(spriteShape) << 14);
oa.attr1 = (static_cast<uint16_t>(x) & ox::onMask<uint8_t>(8))
| (static_cast<uint16_t>(flipX) << 12)
| (static_cast<uint16_t>(spriteSize) << 14);
oa.attr2 = static_cast<uint16_t>(tileIdx & ox::onMask<uint16_t>(8));
oa.idx = idx;