/// <summary>
/// Checks if this render state equals the specified render state.
/// </summary>
/// <param name="other">The other.</param>
/// <returns></returns>
protected bool Equals(RenderState other)
{
return(Equals(RenderSettings, other.RenderSettings) && TileSet.SequenceEqual(other.TileSet) &&
BackgroundTileMap.SequenceEqual(other.BackgroundTileMap) && WindowTileMap.SequenceEqual(other.WindowTileMap) &&
SpriteOam.SequenceEqual(other.SpriteOam) && SpriteTileSet.SequenceEqual(other.SpriteTileSet));
}
/// <summary>
/// Paints a new frame.
/// </summary>
private void Paint()
{
var renderSettings = new RenderSettings(_gpuRegisters);
var backgroundTileMap = _tileRam.ReadBytes(renderSettings.BackgroundTileMapAddress, 0x400);
var tileSet = _tileRam.ReadBytes(renderSettings.TileSetAddress, 0x1000);
var windowTileMap = renderSettings.WindowEnabled ? _tileRam.ReadBytes(renderSettings.WindowTileMapAddress, 0x400) : new byte[0];
byte[] spriteOam, spriteTileSet;
if (renderSettings.SpritesEnabled)
{
// If the background tiles are read from the sprite pattern table then we can reuse the bytes.
spriteTileSet = renderSettings.SpriteAndBackgroundTileSetShared ? tileSet : _tileRam.ReadBytes(0x0, 0x1000);
spriteOam = _spriteRam.ReadBytes(0x0, 0xa0);
}
else
{
spriteOam = spriteTileSet = new byte[0];
}
var renderState = new RenderState(renderSettings, tileSet, backgroundTileMap, windowTileMap, spriteOam, spriteTileSet);
var renderStateChange = renderState.GetRenderStateChange(_lastRenderState);
if (renderStateChange == RenderStateChange.None)
{
// No need to render the same frame twice.
_frameSkip = 0;
_framesRendered++;
return;
}
_lastRenderState = renderState;
_tileMapPointer = _tileMapPointer == null ? new TileMapPointer(renderState) : _tileMapPointer.Reset(renderState, renderStateChange);
var bitmapPalette = _gpuRegisters.LcdMonochromePaletteRegister.Pallette;
for (var y = 0; y < LcdHeight; y++)
{
for (var x = 0; x < LcdWidth; x++)
{
_lcdBuffer.SetPixel(x, y, (byte)bitmapPalette[_tileMapPointer.Pixel]);
if (x + 1 < LcdWidth)
{
_tileMapPointer.NextColumn();
}
}
if (y + 1 < LcdHeight)
{
_tileMapPointer.NextRow();
}
}
_renderer.Paint(_lcdBuffer);
_frameSkip = 0;
_framesRendered++;
}