private void RunVBlank()
{
if (lcdClock >= 144)
{
lcdClock -= 144;
LY++; // Move to next line
// If LY == LYC, set the flag and raise interrupt if it's enabled
matchFlag = LY == LYC;
if (matchFlag && (enabledInterrupts & GPUInterrupts.OnMatch) != 0)
{
LCDCInterrupt?.Invoke();
}
if (LY == 154)
{
renderTask.Wait(); // Wait for the frame to finish rendering
// Start rendering the next frame
LY = 0;
if (LY == LYC && (enabledInterrupts & GPUInterrupts.OnMatch) != 0)
{
LCDCInterrupt?.Invoke();
}
lcdMode = GPUMode.OAMRead;
if ((enabledInterrupts & GPUInterrupts.OnOAMRead) != 0)
{
LCDCInterrupt?.Invoke();
}
renderTask = Task.Run(() => LoadSpriteData());
}
}
}
private void RunVRAMRead()
{
if (lcdClock >= 43)
{
renderTask.Wait(); // Wait for pre-rendering to finish
lcdClock -= 43;
// Switch to HBlank mode
lcdMode = GPUMode.HBlank;
if ((enabledInterrupts & GPUInterrupts.OnHBlank) != 0)
{
LCDCInterrupt?.Invoke();
}
// No task is run during HBlank
}
}
private void RunHBlank()
{
if (lcdClock >= 51) // Horizontal Blank lasts for ~51 m-clock ticks
{
lcdClock -= 51;
LY++; // Move to next line
// If LY == LYC, set the flag and raise interrupt if it's enabled
matchFlag = LY == LYC;
if (matchFlag && (enabledInterrupts & GPUInterrupts.OnMatch) != 0)
{
LCDCInterrupt?.Invoke();
}
if (LY == 144) // Switch to vertical blank mode
{
// Begin rendering the frame
renderTask = Task.Run(() => RenderFrame());
lcdMode = GPUMode.VBlank;
// signal vertical blank interrupt and LCD interrupt (if enabled)
VBlankInterrupt?.Invoke();
if ((enabledInterrupts & GPUInterrupts.OnVBlank) != 0)
{
LCDCInterrupt?.Invoke();
}
}
else // Start rendering the next line
{
lcdMode = GPUMode.OAMRead;
if ((enabledInterrupts & GPUInterrupts.OnOAMRead) != 0)
{
LCDCInterrupt?.Invoke();
}
renderTask = Task.Run(() => LoadSpriteData());
}
}
}