static bool tstCx(int i, TIACxFlags cxf1, TIACxFlags cxf2)
{
var f1 = (int)cxf1;
var f2 = (int)cxf2;
return(((i & f1) != 0) && ((i & f2) != 0));
}
void RenderFromStartClockTo(ulong endClock)
{
RenderClock:
if (StartClock >= endClock)
{
return;
}
++HSync;
if (StartClock == StartHMOVEClock)
{
// turn on HMOVE
HMoveLatch = true;
HMoveCounter = 0xf;
P0mmr = P1mmr = M0mmr = M1mmr = BLmmr = true;
}
else if (HSync == 0)
{
// just wrapped around, clear late HBLANK
HMoveLatch = false;
}
// position counters are incremented during the visible portion of the scanline
if (HSync >= 68 + (HMoveLatch ? 8 : 0))
{
++P0; ++P1; ++M0; ++M1; ++BL;
}
// HMOVE compare, once every 1/4 CLK when on
if (HMoveCounter >= 0 && (HSync & 3) == 0)
{
if (((HMoveCounter ^ RegW[HMP0]) & 0xf) == 0xf)
{
P0mmr = false;
}
if (((HMoveCounter ^ RegW[HMP1]) & 0xf) == 0xf)
{
P1mmr = false;
}
if (((HMoveCounter ^ RegW[HMM0]) & 0xf) == 0xf)
{
M0mmr = false;
}
if (((HMoveCounter ^ RegW[HMM1]) & 0xf) == 0xf)
{
M1mmr = false;
}
if (((HMoveCounter ^ RegW[HMBL]) & 0xf) == 0xf)
{
BLmmr = false;
}
if (HMoveCounter >= 0)
{
HMoveCounter--;
}
}
// HMOVE increment, once every 1/4 CLK, 2 CLK after first compare when on
if (HMoveCounter < 0xf && (HSync & 3) == 2)
{
if (HSync < 68 + (HMoveLatch ? 8 : 0))
{
if (P0mmr)
{
++P0;
}
if (P1mmr)
{
++P1;
}
if (M0mmr)
{
++M0;
}
if (M1mmr)
{
++M1;
}
if (BLmmr)
{
++BL;
}
}
}
if (HSync == 68 + 76)
{
PFReflectionState = RegW[CTRLPF] & 0x01;
}
var fbyte = (byte)0;
var fbyte_colupf = colupf;
TIACxFlags cxflags = 0;
if (vblankon || HSync < 68 + (HMoveLatch ? 8 : 0))
{
goto WritePixel;
}
fbyte = colubk;
var colupfon = false;
if ((PF210 & TIATables.PFMask[PFReflectionState][HSync - 68]) != 0)
{
if (scoreon)
{
fbyte_colupf = (HSync - 68) < 80 ? colup0 : colup1;
}
colupfon = true;
cxflags |= TIACxFlags.PF;
}
if (blon && BL >= 0 && TIATables.BLMask[BLsize][BL])
{
colupfon = true;
cxflags |= TIACxFlags.BL;
}
if (!pfpriority && colupfon)
{
fbyte = fbyte_colupf;
}
if (m1on && M1 >= 0 && TIATables.MxMask[M1size][M1type][M1])
{
fbyte = colup1;
cxflags |= TIACxFlags.M1;
}
if (P1 >= 0 && (TIATables.PxMask[P1suppress][P1type][P1] & EffGRP1) != 0)
{
fbyte = colup1;
cxflags |= TIACxFlags.P1;
}
if (m0on && M0 >= 0 && TIATables.MxMask[M0size][M0type][M0])
{
fbyte = colup0;
cxflags |= TIACxFlags.M0;
}
if (P0 >= 0 && (TIATables.PxMask[P0suppress][P0type][P0] & EffGRP0) != 0)
{
fbyte = colup0;
cxflags |= TIACxFlags.P0;
}
if (pfpriority && colupfon)
{
fbyte = fbyte_colupf;
}
WritePixel:
Collisions |= TIATables.CollisionMask[(int)cxflags];
if (HSync >= 68)
{
M.FrameBuffer.VideoBuffer[FrameBufferIndex++] = fbyte;
if (FrameBufferIndex == M.FrameBuffer.VideoBufferByteLength)
{
FrameBufferIndex = 0;
}
if (HSync == 227)
{
ScanLine++;
}
}
if (P0 >= 156)
{
P0suppress = 0;
}
if (P1 >= 156)
{
P1suppress = 0;
}
// denote this CLK has been completed by incrementing to the next
StartClock++;
goto RenderClock;
}
static bool tstCx(int i, TIACxFlags cxf1, TIACxFlags cxf2)
{
var f1 = (int)cxf1;
var f2 = (int)cxf2;
return ((i & f1) != 0) && ((i & f2) != 0);
}
