public void DrawFrame(int rowBegin, int rowEnd)
{
if (!_state.Enabled)
{
return;
}
if (rowBegin > 143)
{
return;
}
#region BACKGROUND
bool drawBackground = _state.LCDCBits[0];
// We copy the information from the background tile to the effective screen
for (int y = rowBegin; y < rowEnd; y++)
{
// We obtain the correct row
int bY = (y + _state.SCY) % _disDef.FramePixelCountY;
DisFuncs.GetRowPixels(ref _tempFrameLineBuffer,
_pixelLookupTable,
_disDef, _memory,
_tempPixelBuffer,
bY, _state.LCDCBits[3], _state.LCDCBits[4]);
if (_updateDebugTargets[(int)DebugTargets.Background])
{
// TODO(Cristian): Draw the whole debug target
DrawFuncs.DrawLine(_disDef, _debugInternalTargets[(int)DebugTargets.Background],
_disDef.FramePixelCountX,
_tempFrameLineBuffer,
0, bY,
0, _disDef.FramePixelCountX);
}
if (drawBackground)
{
DrawFuncs.DrawLine(_disDef, _screenInternalBuffer,
_disDef.ScreenPixelCountX,
_tempFrameLineBuffer,
0, y,
_state.SCX, _disDef.FramePixelCountX,
false, true);
}
}
#endregion
#region WINDOW
int rWX = _state.WX - 7; // The window pos is (WX - 7, WY)
// TODO(Cristian): If BG display is off, it actually prints white
bool drawWindow = _state.LCDCBits[5];
for (int row = rowBegin; row < rowEnd; row++)
{
if ((row >= _state.CurrentWY) && (row < 144))
{
// The offset indexes represent that the window is drawn from it's beggining
// at (WX, WY)
DisFuncs.GetRowPixels(ref _tempFrameLineBuffer,
_pixelLookupTable,
_disDef, _memory, _tempPixelBuffer,
row - _state.CurrentWY,
_state.LCDCBits[6], _state.LCDCBits[4]);
// Independent target
if (_updateDebugTargets[(int)DebugTargets.Window])
{
DrawFuncs.DrawLine(_disDef, _debugInternalTargets[(int)DebugTargets.Window],
_disDef.ScreenPixelCountX,
_tempFrameLineBuffer,
rWX, row,
0, _disDef.ScreenPixelCountX - rWX);
}
// Screen target
if (drawWindow)
{
DrawFuncs.DrawLine(_disDef, _screenInternalBuffer,
_disDef.ScreenPixelCountX,
_tempFrameLineBuffer,
rWX, row,
0, _disDef.ScreenPixelCountX - rWX);
}
}
}
#endregion
#region SPRITES
bool drawSprites = _state.LCDCBits[1];
for (int row = rowBegin; row < rowEnd; row++)
{
if (_updateDebugTargets[(int)DebugTargets.SpriteLayer])
{
// Independent target
uint[] pixels = new uint[_disDef.ScreenPixelCountX];
DisFuncs.GetSpriteRowPixels(_pixelLookupTable,
_disDef, _memory, _spriteOAMs, pixels,
_tempPixelBuffer,
row, _state.LCDCBits[2],
true);
DrawFuncs.DrawLine(_disDef, _debugInternalTargets[(int)DebugTargets.SpriteLayer],
_disDef.ScreenPixelCountX,
pixels,
0, row,
0, _disDef.ScreenPixelCountX);
}
// Screen Target
if (drawSprites)
{
DisFuncs.GetPixelRowFromBitmap(ref _tempFrameLineBuffer,
_disDef, _screenInternalBuffer,
row, _disDef.ScreenPixelCountX);
DisFuncs.GetSpriteRowPixels(_pixelLookupTable,
_disDef, _memory, _spriteOAMs,
_tempFrameLineBuffer, _tempPixelBuffer,
row, _state.LCDCBits[2]);
DrawFuncs.DrawLine(_disDef, _screenInternalBuffer, _disDef.ScreenPixelCountX,
_tempFrameLineBuffer,
0, row,
0, _disDef.ScreenPixelCountX);
}
}
#endregion
}