public int DrawLine(int _rasterLine, bool _outputEnabled)
{
// returns number of CPU-Ticks - 40 for a "bad line"; else 0
VICState = GetState();
//if (!OutputEnabled())
// return 0;
// UpdateRasterLine(_rasterLine);
// UpdateRasterLine(_rasterLine - 3 + VICState.OffsetY); // <- works fine in choplifter (textmode -> graphicsmode switch)
UpdateRasterLine(_rasterLine - 5); // <- works fine in choplifter (textmode -> graphicsmode switch)
byte[] pixels = new byte[512];
int markRasterLine = RasterlineIRQ;
//markRasterLine = RasterlineIRQ;
if (_outputEnabled)
{
RenderLineToArray(_rasterLine, ref pixels);
RenderBorderToArray(_rasterLine, ref pixels);
// debug
if (DebugOptions.RenderIRQRasterLine)
{
if (_rasterLine == markRasterLine)
{
for (int i = 0; i < VICState.FirstPixel; i += 3)
{
pixels[i] = 1;
}
}
}
CopyByteLineToBitmap(pixels, GetScreen(), _rasterLine);
}
if (IsBadLine(_rasterLine))
{
return(40);
}
return(0);
}
public VIC2_State GetState()
{
VIC2_State state = new VIC2_State();
state.OutputEnabled = (Read(0xd011, true) & BIT.B4) > 0;
state.BorderColor = (Read(0xd020, true) & 0x0f);
state.BackgrundColor = (Read(0xd021, true) & 0x0f);
state.OffsetY = (Read(0xd011, true) & 0x07) - 3;
state.OffsetX = (Read(0xd016, true) & 0x07);
state.TextColumns = 38;
if ((Read(0xd016, true) & 0x08) > 0)
{
state.TextColumns = 40;
}
state.TextRows = 24;
if ((Read(0xd011, true) & BIT.B3) > 0)
{
state.TextRows = 25;
}
byte _D011 = Read(0xd011, true);
byte _D016 = Read(0xd016, true);
state.BMM = (_D011 & BIT.B5) > 0;
state.ECM = (_D011 & BIT.B6) > 0;
state.MCM = (_D016 & BIT.B4) > 0;
// memory-bank
state.BankBaseAddress = GetBankAddress();
byte VIC_D018_MemCtrl = Read(0xd018, true);
state.ScreenAddress = ((VIC_D018_MemCtrl >> 4) & 0x0f) * 0x400;
state.BitmapAddress = 0;
if ((VIC_D018_MemCtrl & 8) > 0)
{
state.BitmapAddress += 0x2000;
}
state.CharMemAddress = ((VIC_D018_MemCtrl >> 1) & 0x07) * 0x800;
state.CharMemAddress = GetCharMemAddress();
// rendering parameters
state.HorStartPixel = Settings.BorderLeft + state.OffsetX;
state.FirstPixel = Settings.BorderLeft;
if (state.TextColumns == 38)
{
state.FirstPixel += 7;
}
state.LastPixel = state.FirstPixel + (8 * state.TextColumns) - 1;
state.FirstScreenLine = 0;
state.LastScreenLine = 199;
if (state.TextRows == 24)
{
state.FirstScreenLine = 0;
state.LastScreenLine = 191;
/*
* if ((D011_Status & 0x08) == 0)
* {
* minScreenLine = 6;
* maxScreenLine = 196;
* screenLine += 3;
* }
*/
}
return(state);
}