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SMS: apply previous sprite fixes to doublesize renderer

This commit is contained in:
beirich 2014-03-17 11:51:00 +00:00
parent 227007c07d
commit cbc4d925be
1 changed files with 39 additions and 15 deletions
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50
BizHawk.Emulation.Cores/Consoles/Sega/SMS/VDP.Mode4.cs
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@ -147,8 +147,10 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
x -= 8;
int y = VRAM[SpriteBase + i] + 1;
if (y == 209 && FrameHeight == 192) break; // 208 is special terminator sprite (in 192-line mode)
if (y >= (EnableLargeSprites ? 240 : 248)) y -= 256;
if (y == 209 && FrameHeight == 192)
break; // 208 is special terminator sprite (in 192-line mode)
if (y >= (EnableLargeSprites ? 240 : 248))
y -= 256;
if (y + SpriteHeight <= ScanLine || y > ScanLine)
continue;
@ -165,8 +167,9 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
byte color = PatternBuffer[(tileNo * 64) + (ys * 8) + xs];
if (color != 0 && x + xs >= 0)
{
if (collisionHappens && SpriteCollisionBuffer[x + xs] != 0)
if (SpriteCollisionBuffer[x + xs] != 0)
{
if (collisionHappens)
StatusByte |= 0x20; // Set Collision bit
}
else if (renderHappens && ScanlinePriorityBuffer[x + xs] == 0)
@ -180,10 +183,23 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
}
}
// TODO apply enhancements from 1x renderer to 2x renderer. lets be consistent
internal void RenderSpritesCurrentLineDoubleSize(bool show)
{
if (DisplayOn == false) return;
bool overflowHappens = true;
bool collisionHappens = true;
bool renderHappens = show;
if (!DisplayOn)
{
renderHappens = false;
collisionHappens = false;
}
if (ScanLine >= FrameHeight)
{
renderHappens = false;
overflowHappens = false;
}
int SpriteBase = SpriteAttributeTableBase;
int SpriteHeight = EnableLargeSprites ? 16 : 8;
@ -196,8 +212,11 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
{
if (SpritesDrawnThisScanline >= 8)
{
collisionHappens = false; // technically the VDP stops processing sprite past this so we would never set the collision bit for sprites past this
if (overflowHappens)
StatusByte |= 0x40; // Set Overflow bit
if (SpriteLimit) break;
if (SpriteLimit)
renderHappens = false; // should be able to break/return, but to ensure this has no effect on sync we keep processing and disable rendering
}
int x = VRAM[SpriteBase + 0x80 + (i * 2)];
@ -205,8 +224,10 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
x -= 8;
int y = VRAM[SpriteBase + i] + 1;
if (y == 209 && FrameHeight == 192) break; // terminator sprite
if (y >= (EnableLargeSprites ? 240 : 248)) y -= 256;
if (y == 209 && FrameHeight == 192)
break; // terminator sprite
if (y >= (EnableLargeSprites ? 240 : 248))
y -= 256;
if (y + (SpriteHeight * 2) <= ScanLine || y > ScanLine)
continue;
@ -221,15 +242,18 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
for (int xs = 0; xs < 16 && x + xs < 256; xs++)
{
byte color = PatternBuffer[(tileNo * 64) + ((ys / 2) * 8) + (xs / 2)];
if (color != 0 && x + xs >= 0 && ScanlinePriorityBuffer[x + xs] == 0)
if (color != 0 && x + xs >= 0)
{
if (SpriteCollisionBuffer[x + xs] != 0)
StatusByte |= 0x20; // Set Collision bit
else
{
if (show) FrameBuffer[(ys + y) * 256 + x + xs] = Palette[(color + 16)];
SpriteCollisionBuffer[x + xs] = 1;
if (collisionHappens)
StatusByte |= 0x20; // Set Collision bit
}
else if (renderHappens && ScanlinePriorityBuffer[x + xs] == 0)
{
FrameBuffer[(ys + y) * 256 + x + xs] = Palette[(color + 16)];
}
SpriteCollisionBuffer[x + xs] = 1;
}
}
SpritesDrawnThisScanline++;