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commodore64: sprite priority fixed and collision detection added

This commit is contained in:
saxxonpike 2012-11-09 15:50:16 +00:00
parent 66c1fc68f6
commit cd7ab3b6f0
1 changed files with 68 additions and 72 deletions
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140
BizHawk.Emulation/Computers/Commodore64/VicII.cs
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@ -859,9 +859,10 @@ namespace BizHawk.Emulation.Computers.Commodore64
private void PerformCycleRender()
{
int spritePixel;
int inputPixel;
int outputPixel;
int spriteBits;
int spritePixel;
int spritePixelOwner;
for (int i = 0; i < 8; i++)
@ -902,98 +903,93 @@ namespace BizHawk.Emulation.Computers.Commodore64
// render plotter
if (idle)
{
inputPixel = regs.BxC[0];
}
else
{
inputPixel = Plotter();
}
// render sprites
outputPixel = pixelBuffer[pixelBufferIndex];
for (int j = 0; j < 8; j++)
{
int spriteBits;
if (regs.MxX[j] == rasterOffsetX)
if (regs.MD[j])
{
regs.MSRA[j] = true;
regs.MSRC[j] = 24;
}
if (regs.MD[j] && regs.MSRA[j])
{
// multicolor consumes two bits per pixel
if (regs.MxMC[j])
if (regs.MxX[j] == rasterOffsetX)
{
spriteBits = (int)((regs.MSR[j] >> 30) & 0x3);
if ((regs.MxXE[j] == false) || (rasterOffsetX & 0x1) != (regs.MxX[j] & 0x1))
{
regs.MSR[j] <<= 2;
regs.MSRC[j]--;
}
regs.MSRA[j] = true;
regs.MSRC[j] = 25;
}
else
if (regs.MSRA[j])
{
spriteBits = (int)((regs.MSR[j] >> 30) & 0x2);
//
if ((regs.MxXE[j] == false) || (rasterOffsetX & 0x1) != (regs.MxX[j] & 0x1))
// multicolor consumes two bits per pixel and is forced wide
if (regs.MxMC[j])
{
regs.MSR[j] <<= 1;
regs.MSRC[j]--;
}
}
// if not transparent, process collisions and color
if (spriteBits != 0)
{
switch (spriteBits)
{
case 1:
spritePixel = regs.MMx[0];
break;
case 2:
spritePixel = regs.MxC[j];
break;
case 3:
spritePixel = regs.MMx[1];
break;
default:
// this should never happen but VS needs this
spritePixel = 0;
break;
}
// process collisions if the border is off
if (!borderOnVertical)
{
if (spritePixelOwner == -1)
spriteBits = (int)((regs.MSR[j] >> 30) & 0x3);
if ((rasterOffsetX & 0x1) != (regs.MxX[j] & 0x1))
{
spritePixelOwner = j;
if (regs.MxDP[j] || (!regs.MxDP[j] && !pixelBufferForeground[pixelBufferIndex]))
regs.MSR[j] <<= 2;
regs.MSRC[j]--;
}
}
else
{
spriteBits = (int)((regs.MSR[j] >> 30) & 0x2);
if ((!regs.MxXE[j]) || (rasterOffsetX & 0x1) != (regs.MxX[j] & 0x1))
{
regs.MSR[j] <<= 1;
regs.MSRC[j]--;
}
}
// if not transparent, process collisions and color
if (spriteBits != 0)
{
switch (spriteBits)
{
case 1:
spritePixel = regs.MMx[0];
break;
case 2:
spritePixel = regs.MxC[j];
break;
case 3:
spritePixel = regs.MMx[1];
break;
default:
// this should never happen but VS needs this
spritePixel = 0;
break;
}
// process collisions if the border is off
if (!borderOnVertical)
{
if (spritePixelOwner == -1)
{
outputPixel = spritePixel;
spritePixelOwner = j;
if (!regs.MxDP[j] || (!pixelBufferForeground[pixelBufferIndex]))
{
outputPixel = spritePixel;
}
}
else
{
// a sprite already occupies this space
regs.MxM[spritePixelOwner] = true;
regs.MxM[j] = true;
regs.IMMC = true;
}
if (dataForeground)
{
regs.MxD[j] = true;
regs.IMBC = true;
}
}
else
{
// a sprite already occupies this space
//regs.MxM[spritePixelOwner] = true;
//regs.MxM[j] = true;
//regs.IMMC = true;
}
if (dataForeground)
{
//regs.MxD[j] = true;
//regs.IMBC = true;
}
}
if (regs.MSRC[j] == 0)
regs.MSRA[j] = false;
}
if (regs.MSRC[j] == 0)
regs.MSRA[j] = false;
}
}
// send pixel to bitmap