empathicqubit/Mesen-SX
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

PPU: Fixed mode7 regressions (horizontal mirroring and sprite priority)

Browse source
This commit is contained in:
Sour 2019-07-13 14:16:50 -04:00
parent 95d0c5a910
commit 0341dd12b2
1 changed files with 16 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
Core/Ppu.cpp
View file

@ -1101,18 +1101,26 @@ void Ppu::RenderTilemapMode7()
(centerY << 8)
);
xValue += _mode7.Matrix[0] * _drawStartX;
yValue += _mode7.Matrix[2] * _drawStartX;
int16_t xStep = _mode7.Matrix[0];
int16_t yStep = _mode7.Matrix[2];
if(_mode7.HorizontalMirroring) {
//Calculate the value at the end of the scanline, and then start going backwards
xValue += xStep * _drawEndX;
yValue += yStep * _drawEndX;
xStep = -xStep;
yStep = -yStep;
}
xValue += xStep * _drawStartX;
yValue += yStep * _drawStartX;
uint8_t pixelFlags = PixelFlags::Filled | (((_colorMathEnabled >> layerIndex) & 0x01) ? PixelFlags::AllowColorMath : 0);
for(int x = _drawStartX; x <= _drawEndX; x++) {
uint16_t realX = _mode7.HorizontalMirroring ? (255 - x) : x;
int32_t xOffset = xValue >> 8;
int32_t yOffset = yValue >> 8;
xValue += _mode7.Matrix[0];
yValue += _mode7.Matrix[2];
xValue += xStep;
yValue += yStep;
if(_rowPixelFlags[x] && _subScreenFilled[x]) {
continue;
@ -1156,11 +1164,11 @@ void Ppu::RenderTilemapMode7()
paletteColor = _cgram[colorIndex];
}
if(drawMain && !ProcessMaskWindow<layerIndex>(mainWindowCount, x)) {
if(drawMain && !_rowPixelFlags[x] && !ProcessMaskWindow<layerIndex>(mainWindowCount, x)) {
DrawMainPixel(x, paletteColor, pixelFlags);
}
if(drawSub && !ProcessMaskWindow<layerIndex>(subWindowCount, x)) {
if(drawSub && !_subScreenFilled[x] && !ProcessMaskWindow<layerIndex>(subWindowCount, x)) {
DrawSubPixel(x, paletteColor);
}
}