public LcdController(GameboyAdvance gba)
{
this.gba = gba;
frameBuffer0 = new DirectBitmap(Screen_X_Resolution, Screen_Y_Resolution);
frameBuffer1 = new DirectBitmap(Screen_X_Resolution, Screen_Y_Resolution);
FrameBuffer = frameBuffer0;
drawBuffer = frameBuffer1;
this.Palettes = new Palettes();
DisplayControlRegister = new DisplayControlRegister(this);
DispStatRegister = new DisplayStatusRegister(this);
BgControlRegisters = new BgControlRegister[4];
Bg = new Background[4];
for (int i = 0; i < 4; i++)
{
BgControlRegisters[i] = new BgControlRegister(this, i);
Bg[i] = new Background(gba, i, BgControlRegisters[i]);
priorityObjList[i] = new List<Obj>();
}
Obj = new Obj[Max_Sprites];
for (int i = 0; i < Max_Sprites; i++)
{
Obj[i] = new Obj(gba, new ObjAttributes(gba, i * 8, gba.Memory.OamRam));
}
OamAffineMatrices = new OamAffineMatrix[Max_OAM_Matrices];
UInt32 address = 0x00000006;
for (int i = 0; i < 32; i++)
{
OamAffineMatrices[i] = new OamAffineMatrix(gba.Memory.OamRam, address);
address += 0x20;
}
Windows = new Window[4];
for (int i = 0; i < 4; i++)
{
Windows[i] = new Window(gba);
}
#if THREADED_SCANLINE
drawScanline = false;
exitThread = false;
scanlineThread = new Thread(new ThreadStart(ScanlineThread));
scanlineThread.Start();
#endif
}
public LcdController(GameboyAdvance gba)
{
this.gba = gba;
frameBuffer0 = new DirectBitmap(Screen_X_Resolution, Screen_Y_Resolution);
frameBuffer1 = new DirectBitmap(Screen_X_Resolution, Screen_Y_Resolution);
FrameBuffer = frameBuffer0;
drawBuffer = frameBuffer1;
this.Palettes = new Palettes();
DisplayControlRegister = new DisplayControlRegister(gba, this);
DispStatRegister = new DisplayStatusRegister(gba, this);
Bg = new Background[4];
UInt32 scrollBaseAddress = 0x4000010;
for (int i = 0; i < 4; i++)
{
BgControlRegister cntReg = new BgControlRegister(gba, this, i, (UInt32) (0x4000008 + (i * 2)));
MemoryRegister16 scrollXReg = new MemoryRegister16(gba.Memory, scrollBaseAddress, false, true, 0x01);
MemoryRegister16 scrollYReg = new MemoryRegister16(gba.Memory, scrollBaseAddress + 2, false, true, 0x01);
Bg[i] = new Background(gba, i, cntReg, scrollXReg, scrollYReg);
scrollBaseAddress += 4;
}
VCount = new MemoryRegister8(gba.Memory, 0x04000006, true, false);
this.ObjController = new ObjController(gba);
Windows = new Window[4];
Windows[0] = new Window(gba, 0x4000040, 0x4000048);
Windows[1] = new Window(gba, 0x4000042, 0x4000049);
Windows[2] = new Window(gba, 0, 0x400004A);
Windows[3] = new Window(gba, 0, 0x400004B);
this.BlendControlRegister = new BlendControlRegister(this, gba);
BlendingCoefficientRegister = new PixelCoefficientRegister(this, gba, 0x4000052);
BrightnessCoefficientRegister = new PixelCoefficientRegister(this, gba, 0x4000054);
#if THREADED_SCANLINE
//Interlocked.Exchange(ref drawScanline, 0);
drawScanline = 0;
exitThread = false;
scanlineThread = new Thread(new ThreadStart(ScanlineThread));
scanlineThread.Priority = ThreadPriority.Highest;
scanlineThread.Start();
#endif
}
private void RenderScanlineTextMode()
{
ObjPrioritySort();
int scanline = CurrentScanline;
bool windowing = (DisplayControlRegister.DisplayWin0 || DisplayControlRegister.DisplayWin1 || DisplayControlRegister.DisplayWin1 || DisplayControlRegister.DisplayObjWin);
// We render front to back. Once a pixel is drawn we stop going through the layers.
// TODO: In order to do blending we may need to go through all the layers for each pixel
#if ParallelizeScanline
var paritioner = Partitioner.Create(0, LcdController.Screen_X_Resolution, 80);
var result = Parallel.ForEach(paritioner, (range) =>
{
for (int x = range.Item1; x < range.Item2; x++)
#else
for (int x = 0; x < Screen_X_Resolution; x++)
#endif
{
int paletteIndex;
bool pixelDrawn = false;
// Windowing can disable obj's and bg's
bool objVisibleOverride = false;
int windowRegion = 0;
int bgVisibleOverride = 0; // bitmask for bg visible (from window)
if (windowing)
{
windowRegion = TileHelpers.PixelWindowRegion(x, CurrentScanline, gba);
// 0 is outside of all windows
if (windowRegion == 0)
{
objVisibleOverride = Windows[(int) Window.WindowName.WindowOut].DisplayObjs;
bgVisibleOverride = Windows[(int)Window.WindowName.WindowOut].DisplayBg0 |
Windows[(int)Window.WindowName.WindowOut].DisplayBg1 |
Windows[(int)Window.WindowName.WindowOut].DisplayBg2 |
Windows[(int)Window.WindowName.WindowOut].DisplayBg3;
}
// Window 0 takes priority over window 1. We don't need to check if the point is within both areas as it is done in the function call above
else if((windowRegion & (int)TileHelpers.WindowRegion.Window0) != 0)
{
objVisibleOverride = Windows[(int)Window.WindowName.Window0].DisplayObjs;
bgVisibleOverride = Windows[(int)Window.WindowName.Window0].DisplayBg0 |
Windows[(int)Window.WindowName.Window0].DisplayBg1 |
Windows[(int)Window.WindowName.Window0].DisplayBg2 |
Windows[(int)Window.WindowName.Window0].DisplayBg3;
}
else if ((windowRegion & (int)TileHelpers.WindowRegion.Window1) != 0)
{
objVisibleOverride = Windows[(int)Window.WindowName.Window1].DisplayObjs;
bgVisibleOverride = Windows[(int)Window.WindowName.Window1].DisplayBg0 |
Windows[(int)Window.WindowName.Window1].DisplayBg1 |
Windows[(int)Window.WindowName.Window1].DisplayBg2 |
Windows[(int)Window.WindowName.Window1].DisplayBg3;
}
}
else
{
objVisibleOverride = true;
bgVisibleOverride = 0;
}
// Start at the top priority, if something draws to the pixel, we can early out and stop processing this pixel
for (int priority = 0; priority < 4; priority++)
{
// Sprite rendering
if (DisplayControlRegister.DisplayObj &&
(!windowing || (windowing && objVisibleOverride)))
{
pixelDrawn = RenderSpritePixel(x, scanline, priority, windowing, windowRegion, ref bgVisibleOverride);
if (pixelDrawn)
{
break;
}
}
// No Sprite occupied this pixel, move on to backgrounds
// Bg Rendering
// Find the background with this priority
for (int bgSelect = 0; bgSelect < 4; bgSelect++)
{
if (Bg[bgSelect].CntRegister.Priority != priority ||
DisplayControlRegister.BgVisible(Bg[bgSelect].BgNumber) == false ||
(windowing && ((bgVisibleOverride & (1 << bgSelect)) == 0)))
{
continue;
}
if (Bg[bgSelect].AffineMode)
{
paletteIndex = Bg[bgSelect].PixelValueAffine(x, scanline);
}
else
{
paletteIndex = Bg[bgSelect].PixelValue(x, scanline);
}
// Pal 0 == Transparent
if (paletteIndex == 0)
{
continue;
}
drawBuffer.SetPixel(x, scanline, Palettes.Palette0[paletteIndex]);
pixelDrawn = true;
// Once a pixel has been drawn, no need to check other BG's
break;
}
if(pixelDrawn)
{
break;
}
}
// If nothing is drawn then default to backdrop colour
if (pixelDrawn == false)
{
drawBuffer.SetPixel(x, scanline, Palettes.Palette0[0]);
}
}
#if ParallelizeScanline
}); // Parallel.For
//while (result.IsCompleted == false) ;
#endif
}
