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PPU: Sprite interlace flag support (untested)

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This commit is contained in:
Sour 2019-02-24 19:21:19 -05:00
parent 76d1aa82e5
commit 002cda8cf6
2 changed files with 9 additions and 7 deletions
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15
Core/Ppu.cpp
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@ -128,6 +128,7 @@ void Ppu::EvaluateNextLineSprites()
memset(_spritePalette, 0, sizeof(_spritePalette));
_spriteCount = 0;
uint16_t totalWidth = 0;
uint16_t screenY = _objInterlace ? ((_frameCount & 0x01) ? ((_scanline << 1) + 1) : (_scanline << 1)) : _scanline;
for(int i = 0; i < 512; i += 4) {
uint8_t y = _oamRam[i + 1];
@ -138,7 +139,7 @@ void Ppu::EvaluateNextLineSprites()
uint8_t largeSprite = (highTableValue & 0x02) >> 1;
uint8_t height = _oamSizes[_oamMode][largeSprite][1] << 3;
if(y > _scanline + 1 || y + height <= _scanline + 1) {
if(y > screenY + 1 || y + height <= screenY + 1) {
//Not visible on this scanline
continue;
}
@ -168,11 +169,11 @@ void Ppu::EvaluateNextLineSprites()
uint8_t yOffset;
int rowOffset;
if(info.VerticalMirror) {
yOffset = (height - 1 - (_scanline + 1 - y)) & 0x07;
rowOffset = (height - 1 - (_scanline + 1 - y)) >> 3;
yOffset = (height - 1 - (screenY + 1 - y)) & 0x07;
rowOffset = (height - 1 - (screenY + 1 - y)) >> 3;
} else {
yOffset = (_scanline + 1 - y) & 0x07;
rowOffset = (_scanline + 1 - y) >> 3;
yOffset = (screenY + 1 - y) & 0x07;
rowOffset = (screenY + 1 - y) >> 3;
}
uint8_t row = (info.TileRow + rowOffset) & 0x0F;
@ -1428,7 +1429,7 @@ void Ppu::Write(uint32_t addr, uint8_t value)
_colorMathClipMode = (ColorWindowMode)((value >> 6) & 0x03);
_colorMathPreventMode = (ColorWindowMode)((value >> 4) & 0x03);
_colorMathAddSubscreen = (value & 0x02) != 0;
_directColorMode = (value & 0x01) != 0; //TODO
_directColorMode = (value & 0x01) != 0;
break;
case 0x2131:
@ -1457,7 +1458,7 @@ void Ppu::Write(uint32_t addr, uint8_t value)
_mode7.ExtBgEnabled = (value & 0x40) != 0;
_hiResMode = (value & 0x08) != 0;
_overscanMode = (value & 0x04) != 0;
//_objInterlace = (value & 0x02) != 0; //TODO
_objInterlace = (value & 0x02) != 0;
_screenInterlace = (value & 0x01) != 0;
break;

1
Core/Ppu.h
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@ -114,6 +114,7 @@ private:
bool _hiResMode = false;
bool _screenInterlace = false;
bool _objInterlace = false;
bool _overscanMode = false;
bool _directColorMode = false;