mirror of https://github.com/bsnes-emu/bsnes.git
32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
auto PPU::renderSpriteDecode() -> void {
|
|
sprites.reset();
|
|
sprites.reserve(32);
|
|
if(!r.spriteEnable) return;
|
|
|
|
uint offset = 0;
|
|
bool windowInside = status.vclk >= r.spriteWindowY0 && status.vclk <= r.spriteWindowY1;
|
|
uint16 spriteBase = r.spriteBase.bits(0, 4 + system.depth()) << 9;
|
|
uint7 spriteIndex = r.spriteFirst;
|
|
uint8 spriteCount = min(128, (uint)r.spriteCount);
|
|
while(spriteCount--) {
|
|
uint32 attributes = iram.read(spriteBase + (spriteIndex++ << 2), Long);
|
|
|
|
Sprite sprite;
|
|
sprite.x = attributes.bits(24,31);
|
|
if(sprite.x > 224) continue;
|
|
sprite.y = attributes.bits(16,23);
|
|
if(status.vclk < sprite.y) continue;
|
|
if(status.vclk > sprite.y + 7) continue;
|
|
sprite.vflip = attributes.bit(15);
|
|
sprite.hflip = attributes.bit(14);
|
|
sprite.priority = attributes.bit(13);
|
|
sprite.window = attributes.bit(12);
|
|
if(r.spriteWindowEnable && sprite.window && !windowInside) continue;
|
|
sprite.palette = 8 + attributes.bits(9,11);
|
|
sprite.tile = attributes.bits(0,8);
|
|
|
|
sprites.append(sprite);
|
|
if(sprites.size() >= 32) break;
|
|
}
|
|
}
|