mirror of https://github.com/bsnes-emu/bsnes.git
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
auto PPU::Sprite::update(uint10 addr, uint8 data) -> void {
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if(!addr.bit(9)) {
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uint n = addr >> 2; //sprite#
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addr &= 3;
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if(addr == 0) {
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list[n].x.bits(0,7) = data;
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} else if(addr == 1) {
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list[n].y = data;
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} else if(addr == 2) {
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list[n].character = data;
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} else { //(addr == 3)
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list[n].vflip = data.bit (7);
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list[n].hflip = data.bit (6);
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list[n].priority = data.bits(5,4);
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list[n].palette = data.bits(3,1);
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list[n].nameselect = data.bit (0);
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}
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} else {
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uint n = (addr & 0x1f) << 2; //sprite#
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list[n + 0].x.bit(8) = data.bit(0);
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list[n + 0].size = data.bit(1);
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list[n + 1].x.bit(8) = data.bit(2);
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list[n + 1].size = data.bit(3);
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list[n + 2].x.bit(8) = data.bit(4);
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list[n + 2].size = data.bit(5);
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list[n + 3].x.bit(8) = data.bit(6);
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list[n + 3].size = data.bit(7);
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}
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}
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auto PPU::Sprite::synchronize() -> void {
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for(auto n : range(544)) update(n, ppu.oam[n]);
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}
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auto PPU::Sprite::Object::width() const -> uint{
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if(size == 0) {
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static uint width[] = { 8, 8, 8, 16, 16, 32, 16, 16};
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return width[ppu.sprite.regs.base_size];
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} else {
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static uint width[] = {16, 32, 64, 32, 64, 64, 32, 32};
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return width[ppu.sprite.regs.base_size];
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}
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}
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auto PPU::Sprite::Object::height() const -> uint {
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if(size == 0) {
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if(ppu.sprite.regs.interlace && ppu.sprite.regs.base_size >= 6) return 16;
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static uint height[] = { 8, 8, 8, 16, 16, 32, 32, 32};
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return height[ppu.sprite.regs.base_size];
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} else {
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static uint height[] = {16, 32, 64, 32, 64, 64, 64, 32};
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return height[ppu.sprite.regs.base_size];
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}
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}
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