private IVisualization2d GenerateBitmap(ReadOnlyDictionary <string, object> parms)
{
int offset = Util.GetFromObjDict(parms, P_OFFSET, 0);
int width = Util.GetFromObjDict(parms, P_WIDTH, 1);
int height = Util.GetFromObjDict(parms, P_HEIGHT, 1);
bool showInvalid = Util.GetFromObjDict(parms, P_SHOWINVALID, false);
// Check parameters.
int lastAddress = offset + width * height - 1;
if ((offset < 0) || (lastAddress >= this.mFileData.Length))
{
this.mAppRef.ReportError("Invalid parameter");
return(null);
}
// Set palette.
PaletteBitmap bitmap = new PaletteBitmap((uint)width, (uint)height);
bitmap.AddColor(0x00000000); // Transparent
for (int i = 0; i < NesPalette.Length; i++)
{
UInt32 color = 0xFF000000U | (UInt32)NesPalette[i];
bitmap.AddColor((int)color); // Palette color (1 shift)
}
// Convert to pixels.
for (uint y = 0; y < (uint)height; y++)
{
for (uint x = 0; x < (uint)width; x++)
{
uint index = y * (uint)width + x;
byte palette = this.mFileData[offset + index];
if (!showInvalid & ((int)palette > NesPalette.Length))
{
// Transparent invalid color.
bitmap.SetPixel(x, y, 0);
continue;
}
palette = (byte)((palette % NesPalette.Length) + 1);
bitmap.SetPixel(x, y, palette);
}
}
return(bitmap.Bitmap);
}
private void GenerateTile(PaletteBitmap bitmap, ChrMapper mapper, uint row, uint col, byte tile)
{
for (uint tileY = 0; tileY < 8; tileY++)
{
uint drawY = (uint)(row * 8 + tileY);
for (uint tileX = 0; tileX < 8; tileX++)
{
uint drawX = col * 8 + tileX;
byte color = mapper.GetPixel(tile, tileX, tileY);
bitmap.SetPixel(drawX, drawY, (byte)(color + 1));
}
}
}
private void GenerateTile(PaletteBitmap bitmap, int width, int row, int col, int offset)
{
int baseAddr = offset + (row * width + col) * 16;
for (int tileY = 0; tileY < 8; tileY++)
{
uint drawY = (uint)(row * 8 + tileY);
byte high = this.mFileData[baseAddr + tileY + 8];
byte low = this.mFileData[baseAddr + tileY];
for (int tileX = 0; tileX < 8; tileX++)
{
uint drawX = (uint)(col * 8 + tileX);
int shift = 7 - tileX;
int highBit = ((high >> shift) & 0x01) << 1;
int lowBit = ((low >> shift) & 0x01);
int pColor = highBit | lowBit;
bitmap.SetPixel(drawX, drawY, (byte)(pColor + 1));
}
}
}