/// <summary>
/// Computes the next machine frame, updating contents of the provided <see cref="FrameBuffer"/>.
/// </summary>
/// <param name="frameBuffer">The framebuffer to contain the computed output.</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentException">frameBuffer is incompatible with machine.</exception>
public virtual void ComputeNextFrame(FrameBuffer frameBuffer)
{
if (MachineHalt)
{
return;
}
InputState.CaptureInputState();
_FrameBuffer = frameBuffer;
FrameNumber++;
for (var i = 0; i < _FrameBuffer.SoundBufferByteLength; i++)
{
_FrameBuffer.SoundBuffer[i] = 0;
}
}
public override void ComputeNextFrame(FrameBuffer frameBuffer)
{
base.ComputeNextFrame(frameBuffer);
TIA.StartFrame();
CPU.RunClocks = (FrameBuffer.Scanlines + 3) * 76;
while (CPU.RunClocks > 0 && !CPU.Jammed)
{
if (TIA.WSYNCDelayClocks > 0)
{
CPU.Clock += (ulong)TIA.WSYNCDelayClocks / 3;
CPU.RunClocks -= TIA.WSYNCDelayClocks / 3;
TIA.WSYNCDelayClocks = 0;
}
if (TIA.EndOfFrame)
{
break;
}
CPU.Execute();
}
TIA.EndFrame();
}
/// <summary>
/// Create a <see cref="FrameBuffer"/> with compatible dimensions for this machine.
/// </summary>
public FrameBuffer CreateFrameBuffer()
{
var fb = new FrameBuffer(_VisiblePitch, _Scanlines);
return fb;
}
/// <summary>
/// Computes the next machine frame, updating contents of the provided <see cref="FrameBuffer"/>.
/// </summary>
/// <param name="frameBuffer">The framebuffer to contain the computed output.</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentException">frameBuffer is incompatible with machine.</exception>
public virtual void ComputeNextFrame(FrameBuffer frameBuffer)
{
if (MachineHalt)
return;
InputState.CaptureInputState();
_FrameBuffer = frameBuffer;
FrameNumber++;
for (var i = 0; i < _FrameBuffer.SoundBufferByteLength; i++)
_FrameBuffer.SoundBuffer[i] = 0;
}
public void ConnectToMachine(MachineBase m, EMU7800.Win.GameProgram g)
{
framebuffer = m.CreateFrameBuffer();
BufferWidth = framebuffer.VisiblePitch;
BufferHeight = framebuffer.Scanlines;
vidbuffer = new int[BufferWidth * BufferHeight];
uint newsamplerate = (uint)m.SoundSampleFrequency;
if (newsamplerate != samplerate)
{
// really shouldn't happen (after init), but if it does, we're ready
if (resampler != null)
resampler.Dispose();
resampler = new SpeexResampler(3, newsamplerate, 44100, newsamplerate, 44100, null, null);
samplerate = newsamplerate;
dcfilter = DCFilter.DetatchedMode(256);
}
if (g.MachineType == MachineType.A7800PAL || g.MachineType == MachineType.A2600PAL)
palette = TIATables.PALPalette;
else
palette = TIATables.NTSCPalette;
}
/// <summary>
/// Draw specified text at specified position using the specified foreground and background colors.
/// </summary>
/// <param name="frameBuffer"></param>
/// <param name="text"></param>
/// <param name="xoffset"></param>
/// <param name="yoffset"></param>
/// <param name="fore"></param>
/// <param name="back"></param>
/// <exception cref="ArgumentNullException">text must be non-null.</exception>
public void DrawText(FrameBuffer frameBuffer, string text, int xoffset, int yoffset, byte fore, byte back)
{
if (text == null)
{
throw new ArgumentNullException("text");
}
var textchars = text.ToUpper().ToCharArray();
for (var i = 0; i < text.Length + 1; i++)
{
for (var j = 0; j < 9; j++)
{
var pos = (j + yoffset) * frameBuffer.VisiblePitch + i * 5;
for (var k = 0; k < 5; k++)
{
while (pos >= frameBuffer.VideoBufferByteLength)
{
pos -= frameBuffer.VideoBufferByteLength;
}
while (pos < 0)
{
pos += frameBuffer.VideoBufferByteLength;
}
frameBuffer.VideoBuffer[pos++] = back;
}
}
}
for (var i = 0; i < text.Length; i++)
{
var c = textchars[i];
uint fdata;
switch (c)
{
case '/':
case '\\':
fdata = 0x0122448;
break;
case '(':
fdata = 0x2488842;
break;
case ')':
fdata = 0x4211124;
break;
case '.':
fdata = 0x0000066;
break;
case ':':
fdata = 0x0660660;
break;
case '-':
fdata = 0x0007000;
break;
default:
if (c >= 'A' && c <= 'Z')
{
fdata = AlphaFontData[c - 'A'];
}
else if (c >= '0' && c <= '9')
{
fdata = DigitFontData[c - '0'];
}
else
{
fdata = 0;
}
break;
}
var ypos = 8;
for (var j = 0; j < 32; j++)
{
var xpos = j & 3;
if (xpos == 0)
{
ypos--;
}
var pos = (ypos + yoffset) * frameBuffer.VisiblePitch + (4 - xpos) + xoffset;
while (pos >= frameBuffer.VideoBufferByteLength)
{
pos -= frameBuffer.VideoBufferByteLength;
}
while (pos < 0)
{
pos += frameBuffer.VideoBufferByteLength;
}
if (((fdata >> j) & 1) != 0)
{
frameBuffer.VideoBuffer[pos] = fore;
}
}
xoffset += 5;
}
}
/// <summary>
/// Draw specified text at specified position using the specified foreground and background colors.
/// </summary>
/// <param name="frameBuffer"></param>
/// <param name="text"></param>
/// <param name="xoffset"></param>
/// <param name="yoffset"></param>
/// <param name="fore"></param>
/// <param name="back"></param>
/// <exception cref="ArgumentNullException">text must be non-null.</exception>
public void DrawText(FrameBuffer frameBuffer, string text, int xoffset, int yoffset, byte fore, byte back)
{
if (text == null)
throw new ArgumentNullException("text");
var textchars = text.ToUpper().ToCharArray();
for (var i = 0; i < text.Length + 1; i++)
{
for (var j = 0; j < 9; j++)
{
var pos = (j + yoffset) * frameBuffer.VisiblePitch + i * 5;
for (var k = 0; k < 5; k++)
{
while (pos >= frameBuffer.VideoBufferByteLength)
{
pos -= frameBuffer.VideoBufferByteLength;
}
while (pos < 0)
{
pos += frameBuffer.VideoBufferByteLength;
}
frameBuffer.VideoBuffer[pos++] = back;
}
}
}
for (var i = 0; i < text.Length; i++)
{
var c = textchars[i];
uint fdata;
switch (c)
{
case '/':
case '\\':
fdata = 0x0122448;
break;
case '(':
fdata = 0x2488842;
break;
case ')':
fdata = 0x4211124;
break;
case '.':
fdata = 0x0000066;
break;
case ':':
fdata = 0x0660660;
break;
case '-':
fdata = 0x0007000;
break;
default:
if (c >= 'A' && c <= 'Z')
{
fdata = AlphaFontData[c - 'A'];
}
else if (c >= '0' && c <= '9')
{
fdata = DigitFontData[c - '0'];
}
else
{
fdata = 0;
}
break;
}
var ypos = 8;
for (var j = 0; j < 32; j++)
{
var xpos = j & 3;
if (xpos == 0)
{
ypos--;
}
var pos = (ypos + yoffset) * frameBuffer.VisiblePitch + (4 - xpos) + xoffset;
while (pos >= frameBuffer.VideoBufferByteLength)
{
pos -= frameBuffer.VideoBufferByteLength;
}
while (pos < 0)
{
pos += frameBuffer.VideoBufferByteLength;
}
if (((fdata >> j) & 1) != 0)
{
frameBuffer.VideoBuffer[pos] = fore;
}
}
xoffset += 5;
}
}
/// <summary>
/// Create a <see cref="FrameBuffer"/> with compatible dimensions for this machine.
/// </summary>
public FrameBuffer CreateFrameBuffer()
{
var fb = new FrameBuffer(_VisiblePitch, _Scanlines);
return(fb);
}
public override void ComputeNextFrame(FrameBuffer frameBuffer)
{
base.ComputeNextFrame(frameBuffer);
AssertDebug(CPU.Jammed || CPU.RunClocks <= 0 && (CPU.RunClocks % CPU.RunClocksMultiple) == 0);
AssertDebug(CPU.Jammed || ((CPU.Clock + (ulong)(CPU.RunClocks / CPU.RunClocksMultiple)) % (114 * (ulong)FrameBuffer.Scanlines)) == 0);
ulong startOfScanlineCpuClock = 0;
Maria.StartFrame();
Cart.StartFrame();
for (var i = 0; i < FrameBuffer.Scanlines && !CPU.Jammed; i++)
{
AssertDebug(CPU.RunClocks <= 0 && (CPU.RunClocks % CPU.RunClocksMultiple) == 0);
var newStartOfScanlineCpuClock = CPU.Clock + (ulong)(CPU.RunClocks / CPU.RunClocksMultiple);
AssertDebug(startOfScanlineCpuClock == 0 || newStartOfScanlineCpuClock == startOfScanlineCpuClock + 114);
startOfScanlineCpuClock = newStartOfScanlineCpuClock;
CPU.RunClocks += (7 * CPU.RunClocksMultiple);
var remainingRunClocks = (114 - 7) * CPU.RunClocksMultiple;
CPU.Execute();
if (CPU.Jammed)
{
break;
}
if (CPU.EmulatorPreemptRequest)
{
Maria.DoDMAProcessing();
var remainingCpuClocks = 114 - (CPU.Clock - startOfScanlineCpuClock);
CPU.Clock += remainingCpuClocks;
CPU.RunClocks = 0;
continue;
}
var dmaClocks = Maria.DoDMAProcessing();
// CHEAT: Ace of Aces: Title screen has a single scanline flicker without this. Maria DMA clock counting probably not 100% accurate.
if (i == 203 && FrameBuffer.Scanlines == 262 /*NTSC*/ || i == 228 && FrameBuffer.Scanlines == 312 /*PAL*/)
{
if (dmaClocks == 152 && remainingRunClocks == 428 && (CPU.RunClocks == -4 || CPU.RunClocks == -8))
{
dmaClocks -= 4;
}
}
// Unsure exactly what to do if Maria DMA processing extends past the current scanline.
// For now, throw away half remaining until we are within the current scanline.
// KLAX initialization starts DMA without initializing the DLL data structure.
// Maria processing then runs away causing an invalid CPU opcode to be executed that jams the machine.
// So Maria must give up at some point, but not clear exactly how.
// Anyway, this makes KLAX work without causing breakage elsewhere.
while ((CPU.RunClocks + remainingRunClocks) < dmaClocks)
{
dmaClocks >>= 1;
}
// Assume the CPU waits until the next div4 boundary to proceed after DMA processing.
if ((dmaClocks & 3) != 0)
{
dmaClocks += 4;
dmaClocks -= (dmaClocks & 3);
}
CPU.Clock += (ulong)(dmaClocks / CPU.RunClocksMultiple);
CPU.RunClocks -= dmaClocks;
CPU.RunClocks += remainingRunClocks;
CPU.Execute();
if (CPU.Jammed)
{
break;
}
if (CPU.EmulatorPreemptRequest)
{
var remainingCpuClocks = 114 - (CPU.Clock - startOfScanlineCpuClock);
CPU.Clock += remainingCpuClocks;
CPU.RunClocks = 0;
}
}
Cart.EndFrame();
Maria.EndFrame();
}
