private static void ArrangeSlices(Bitmap bm, List <ImageSlice> slices, List <Palette> palettes, List <GTMPFile.PositionData> posData)
{
Rectangle lockRect = new Rectangle(0, 0, bm.Width, bm.Height);
BitmapData bd = bm.LockBits(lockRect, ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
// docs say this is pixel width, it's a dirty liar. It's the byte width
int byteStride = bd.Stride;
foreach (GTMPFile.PositionData pd in posData)
{
int[] colourData = new int[16 * 8];
bool makeTopLeftBlack = false;
ushort actualTile = pd.tile;
//if ((pd.tile & 0x0800) != 0)
//{
// actualTile = (ushort)(pd.tile & ~0x800);
// makeTopLeftBlack = true;
//}
if (pd.palette != 0xFF)
{
ImageSlice tile = slices[actualTile];
Palette p = palettes[pd.palette];
Color topLeft = p.colours[tile.rect[0]];
for (int i = 0; i < (16 * 8); ++i)
{
byte colourIndex = tile.rect[i];
Color pixelColour = p.colours[colourIndex];
if (makeTopLeftBlack && (pixelColour == topLeft))
{
colourData[i] = Color.Black.ToArgb(); //(int)(pixelColour.ToArgb() & 0x00FFFFFF);
}
else
{
colourData[i] = pixelColour.ToArgb();
}
}
}
else
{
Color blockColour = GTMPFile.MakeColorFromBGR555(actualTile);
int colourRGB = blockColour.ToArgb();
for (int i = 0; i < (16 * 8); ++i)
{
colourData[i] = colourRGB;
}
}
IntPtr scanLineIter = new IntPtr(bd.Scan0.ToInt64() + ((pd.y * byteStride) + (pd.x * 4)));
for (int i = 0; i < 8; ++i)
{
Marshal.Copy(colourData, i * 16, scanLineIter, 16);
scanLineIter = new IntPtr(scanLineIter.ToInt64() + bd.Stride);
}
}
bm.UnlockBits(bd);
}
static void PlotBitmap(BitmapData bmData, List <int> pixels, List <int> palette)
{
IntPtr pData = bmData.Scan0;
int width = bmData.Width;
int numPixels = pixels.Count;
List <int> linePixels = new List <int>(bmData.Width);
int paletteEntries = palette.Count;
int lastColour = 0;
for (int i = 0; i < numPixels; ++i)
{
int paletteIndex = pixels[i];
bool justColour = false;
if (paletteIndex > paletteEntries)
{
Debug.WriteLine(String.Format("Found palette index of {0:x}, there are only {1:x} in the palette", paletteIndex, paletteEntries));
paletteIndex = GTMPFile.MakeColorFromBGR555((ushort)paletteIndex).ToArgb();
justColour = true;
}
if ((linePixels.Count > 1) && ((linePixels.Count % bmData.Width) == 0))
{
Marshal.Copy(linePixels.ToArray(), 0, pData, linePixels.Count);
pData = new IntPtr(pData.ToInt64() + (linePixels.Count * 4));
linePixels.Clear();
}
//int palColour = palette[paletteIndex];
//int alphaVal = (int)((palColour & 0xFF000000) >> 24);
//if (alphaVal != 0x80)
//{
// int percentOfThisColour = (int)((alphaVal / 128.0f) * 100);
// int blended = BlendColours(palColour, lastColour, percentOfThisColour);
// palColour = blended;
//}
//else
//{
// lastColour = palColour;
//}
linePixels.Add(justColour ? paletteIndex : palette[paletteIndex]);
}
Marshal.Copy(linePixels.ToArray(), 0, pData, linePixels.Count);
}
public static Bitmap Parse(string file)
{
List <Palette> paletteList = new List <Palette>();
byte[] fileData = File.ReadAllBytes(file);
if (Encoding.ASCII.GetString(fileData, 0, 3) != "GM\x3")
{
return(null);
}
int[] gmllPositions = FindPattern(fileData, Encoding.ASCII.GetBytes("GMLL"), 4);
if (gmllPositions.Length == 0)
{
return(null);
}
int gmllPos1 = gmllPositions[0];
List <Rectangle> clickablePos = FindClickRects(fileData, gmllPos1);
int numPositionsEntries = BitConverter.ToInt32(fileData, gmllPos1 + 4);
// first +4 for GMLL, second 4 for the number of entries
int paletteOffset = gmllPos1 + 4 + 4 + (numPositionsEntries * 4);
int pixelDataOffset = paletteOffset + 0x404;
int numImageBytes = (int)(fileData.Length - pixelDataOffset);
byte[] imageArray = new byte[numImageBytes];
Array.Copy(fileData, pixelDataOffset, imageArray, 0, numImageBytes);
int palettePosIter = paletteOffset;
for (int i = 0; i < 32; ++i)
{
Palette p = new Palette();
for (int j = 0; j < p.colours.Length; ++j, palettePosIter += 2)
{
// colours are in BGR format
ushort color = BitConverter.ToUInt16(fileData, palettePosIter);
Color rgbColor = GTMPFile.MakeColorFromBGR555(color);
p.colours[j] = rgbColor;
}
paletteList.Add(p);
}
List <ImageSlice> slices = ParseSlices(imageArray);
// image positiioning seems to be on an absolute 512x504 canvas even if there's
// only enough image data in the file to cover 512x8
Bitmap bm = new Bitmap(512, 504, PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(bm))
{
g.FillRectangle(Brushes.Black, new Rectangle(0, 0, 512, 504));
}
byte[] positionArray = new byte[numPositionsEntries * 4];
Array.Copy(fileData, gmllPos1 + 8, positionArray, 0, positionArray.Length);
List <GTMPFile.PositionData> pd = ParsePositionData(positionArray, positionArray.Length);
ArrangeSlices(bm, slices, paletteList, pd);
if (clickablePos.Count > 0)
{
using (Graphics g = Graphics.FromImage(bm))
{
foreach (Rectangle r in clickablePos)
{
g.DrawRectangle(Pens.YellowGreen, r);
}
}
}
return(bm);
}