public void ProcessUpdates(SpriteFrame frameToUpdate, Bitmap bmpWithChanges)
{
//update the bitmap, if frameToUpdate.PendingChanges is true
frameToUpdate.ProcessUpdates(bmpWithChanges);
Sprite spr = frameToUpdate.ParentSprite;
List<byte[]> SpriteFrameDataArrays = new List<byte[]>();
//update the SprBitmapOffset since changes will change the size of the
//FrameRawData when it gets written to an SPR. The game depends on having
//the exact offsets to the SPR data.
int offset = 0;
for (int i = 0; i < spr.Frames.Count; i++)
{
SpriteFrame sf = spr.Frames[i];
offset += sf.FrameRawData.Length;
//we depend on short-circuit evaluation here.If i isn't less then the Frames.Count - 1,
//we'll end up with an out-of-bounds exception. We can't just test for PendingChanges because
//changes in one SpriteFrame will affect offsets in others, not in itself.
if ((i < spr.Frames.Count - 1) && (spr.Frames[i + 1].SprBitmapOffset != offset))
{
spr.Frames[i + 1].SprBitmapOffset = offset;
//this.PendingChanges = true;
foreach (DataRow dr in spr.Frames[i + 1].GameSetDataRows)
{
dr.BeginEdit();
dr[9] = offset.ToString();
dr.AcceptChanges(); //calls EndEdit() implicitly
}
sf.PendingChanges = false;
}
//Killing two birds with one for loop. See below.
SpriteFrameDataArrays.Add(sf.FrameRawData);
}
//convert the List<byte[]> to a byte[]
int lastSize = 0;
byte[] newSprData = new byte[offset]; //offset now equals the total size of all the frames
foreach (byte[] b in SpriteFrameDataArrays)
{
Buffer.BlockCopy(b, 0, newSprData, lastSize, b.Length);
lastSize += b.Length;
}
this._sprData = newSprData;
//using (MemoryStream newSprData = new MemoryStream(offset))
//{
// newSprData.SetLength(offset);
// int count = 0;
// int len = 0;
// foreach (SpriteFrame sf in spr.Frames)
// {
// try
// {
// //newSprData.SetLength(newSprData.Length + sf.FrameRawData.Length);
// newSprData.Write(sf.FrameRawData, (int) newSprData.Position, sf.FrameRawData.Length);
// count++;
// len += sf.FrameRawData.Length;
// }
// catch(Exception e)
// {
// Debugger.Break();
// }
// }
// this._sprData = newSprData.GetBuffer();
//}
//this.BuildSpr();
//this._sprData = BuildSpr();
//OnSpriteObjectChanged(EventArgs.Empty);
}
public static void SprStreamToSpriteFrame(SpriteFrame sf, Stream stream)
{
sf.SprBitmapOffset = (int) stream.Position;
//Read Header
byte[] frame_size_bytes = new byte[8];
stream.Read(frame_size_bytes, 0, 8);
int sprSize = BitConverter.ToInt32(frame_size_bytes, 0);
sf.Width = BitConverter.ToInt16(frame_size_bytes, 4);
sf.Height = BitConverter.ToInt16(frame_size_bytes, 6);
sf.PixelSize = sf.Height * sf.Width;
sf.FrameBmpData = new byte[sf.PixelSize];
sf.FrameRawData = new byte[sf.PixelSize];
//initialize it to an unused transparent-pixel-marker
//todo: Verify 0xff is/isn't used in any of the other sprites
sf.FrameBmpData = Enumerable.Repeat<byte>(0xff, sf.PixelSize).ToArray();
sf.FrameRawData = Enumerable.Repeat<byte>(0xff, sf.PixelSize).ToArray();
Buffer.BlockCopy(frame_size_bytes, 0, sf.FrameRawData, 0, 8);
int pixelsToSkip = 0;
int bytesRead = 8; //start after the header info
byte pixel;
for (int y = 0; y < sf.Height; ++y)
{
for (int x = 0; x < sf.Width; ++x)
{
if (pixelsToSkip != 0) //only if we've previously identified transparent bits
{
if (pixelsToSkip >= sf.Width - x) //greater than one line
{
pixelsToSkip -= (sf.Width - x); // skip to next line
break;
}
x += pixelsToSkip; //skip reading the indicated amount of bytes for transparent pictures
pixelsToSkip = 0;
}
try
{
pixel = Convert.ToByte(stream.ReadByte());
sf.FrameRawData[bytesRead] = pixel;
bytesRead++;
}
catch
{
//got -1 for EOF
byte[] resize = sf.FrameRawData;
Array.Resize<byte>(ref resize, bytesRead);
sf.FrameRawData = resize;
return;
}
if (pixel < 0xf8)//MIN_TRANSPARENT_CODE) //normal pixel
{
sf.FrameBmpData[sf.Width * y + x] = pixel;
}
else if (pixel == 0xf8)//MANY_TRANSPARENT_CODE)
{
pixel = Convert.ToByte(stream.ReadByte());
pixelsToSkip = pixel - 1;
sf.FrameRawData[bytesRead] = pixel;
bytesRead++;
}
else //f9,fa,fb,fc,fd,fe,ff
{
pixelsToSkip = 256 - pixel - 1; // skip (neg al) pixels
}
}//end inner for
}//end outer for
byte[] resizeMe = sf.FrameRawData;
Array.Resize<byte>(ref resizeMe, bytesRead);
sf.FrameRawData = resizeMe;
}
public static void FrameBmpToSpr(SpriteFrame sf, ColorPalette pal)
{
byte palColorByte;
byte transparentByte = 0xf8;
int transparentByteCount = 0;
int realOffset = 8; //since our array offset is unaware of the SPR header data
byte[] indexedData = new byte[sf.PixelSize + 4];
// todo: will have to recalculate height/width if bitmap size changes
byte[] width = BitConverter.GetBytes((short) sf.Width);
byte[] height = BitConverter.GetBytes((short) sf.Height);
/**************************************************************************
* BitConverter is required, rather than Convert.ToByte(), so we can
* get the full 16- or 32-bit representations of the values. This is also
* why Height and Width are both cast to short, to ensure we get a 16-bit
* representation of each value to match the binary's file format of:
* ____________________________________________________________
* | 4 byte Size | 2 byte Width | 2 byte Height | byte[] data |
**************************************************************************/
int seek_pos = 4; //first four bytes are for SprSize, at the end of the function
Buffer.BlockCopy(width, 0, indexedData, seek_pos, width.Length);
seek_pos += width.Length;
Buffer.BlockCopy(height, 0, indexedData, seek_pos, height.Length);
seek_pos += height.Length;
List<Color> Palette = new List<Color>();
foreach (Color c in pal.Entries)
{
Palette.Add(c);
}
////BuildBitmap8bppIndexed() may be called to save the
////current image before making changes. So we build
////a 32-bit BMP with current FrameData so it can be used
////below and to build this SPR to return to the caller.
//if (sf.ImageBmp == null)
// FrameSprToBmp(sf);
for (int y = 0; y < sf.ImageBmp.Height; ++y)
{
for (int x = 0; x < sf.ImageBmp.Width; ++x)
{
Color pixel = sf.ImageBmp.GetPixel(x, y);
var pixARGB = pixel.ToArgb();
palColorByte = Convert.ToByte(Palette.FindIndex(c => c == Color.FromArgb(pixARGB)));
if (palColorByte > 0xf8) //0xf9 - 0xff are transparent
transparentByteCount++;
// Once we hit a non-zero pixel, we need to write out the transparent pixel marker
// and the count of transparent pixels. We then write out the current non-zero pixel.
// The second expression after || below is to check if we're on the last pixel of the
// image. If so, and the final pixels were colored, there won't be a next pixel to be
// below 0xf8 so we need to write it out anyway.
bool lastByte = (x == (sf.Width - 1) && (y == (sf.Height - 1)));
if (palColorByte <= 0xf8 || lastByte)
{
if (transparentByteCount > 0)
{
// Write 0xf8[dd] where [dd] is transparent byte count, unless the
// number of transparent bytes is 6 or less, then just use the other
// codes below. Seems like the devs were pretty ruthless in trying to
// save disk space back in 1997.
if (transparentByteCount > 7)
{
indexedData[realOffset] = transparentByte;
realOffset++;
indexedData[realOffset] = Convert.ToByte(transparentByteCount);
realOffset++;
transparentByteCount = 0;
}
else
{
//less than 8 and 7kaa cuts down on file size by just writing one byte
//transparentByteCount = 2: 0xfe
//transparentByteCount = 3: 0xfd
//transparentByteCount = 4: 0xfc
//transparentByteCount = 5: 0xfb
//transparentByteCount = 6: 0xfa
//transparentByteCount = 7: 0xf9
indexedData[realOffset] = Convert.ToByte(0xff - (transparentByteCount - 1));
realOffset++;
transparentByteCount = 0;
}
}
//there is no other byte to write out
if (!lastByte)
{
indexedData[realOffset] = palColorByte;
realOffset++;
}
}
}//end inner for
}//end outer for
//subtract four because the int32 size in the header is exclusive of those bytes used for the int32 size
byte[] size = BitConverter.GetBytes(realOffset - 4);
if (size.Length > 4)
{
string error = $"SPR size must be Int32! Size for {sf.ParentSprite.SpriteId}'s SpriteFrame at offset {realOffset} is {size.ToString()}";
Trace.WriteLine(error);
throw new Exception(error);
}
Buffer.BlockCopy(size, 0, indexedData, 0, size.Length);
//Since FrameData is set to ((Width * Height) + 4), its length will
//be based on the real pixels, not the "compressed" length with
//the transparent pixels. This makes it impossible to calculate the
//offsets of the next frames in the sprite to build a new game set.
Array.Resize<byte>(ref indexedData, realOffset);
sf.FrameRawData = indexedData;
}
public static Bitmap FrameSprToBmp(SpriteFrame sf, ColorPalette pal)
{
int idx;
Bitmap bmp = new Bitmap(sf.Width, sf.Height);
FastBitmap fbmp = new FastBitmap(bmp);
fbmp.LockImage();
for (int y = 0; y < sf.Height; y++)
{
for (int x = 0; x < sf.Width; x++)
{
idx = sf.FrameBmpData[y * sf.Width + x];
Color pixel = pal.Entries[idx];
fbmp.SetPixel(x, y, pixel);
}
}
fbmp.UnlockImage();
Color transparentByte = Color.FromArgb(0xff);
bmp.MakeTransparent(transparentByte);
return bmp;
}
public SpriteFrame AddFrame(SpriteFrame sf = null)
{
if (sf == null)
{
sf = new SpriteFrame();
this.Frames.Add(sf);
return sf;
}
this.Frames.Add(sf);
return sf;
}
/// <summary>
/// Opens an SPR file and creates a <see cref="SpriteResource"/> object for it
/// </summary>
/// <param name="filepath">The absolute path to the SPR file to open</param>
/// <returns>The newly-created <see cref="Sprite"/></returns>
/// <remarks>
/// The original game code for reading SPR files can be found <code>ResourceDb::init_imported()</code>
/// in src/ORESDB.cpp around line 72. The <code>resName</code> will be "sprite\\NAME.SPR". (There's
/// no need to follow the call into <code>File::file_open()</code> in OFILE.cpp. Though the files are
/// well-structured, they are considered FLAT by 7KAA.
/// </remarks>
public void LoadSprite(string filepath)
{
if (this.ActivePalette == null)
throw new Exception("Cannot load a Sprite if the ActivePalette is null.");
//cant use the property here or we'll fire the event before we've finished loading
Sprite spr = new Sprite(this.ActivePalette);
//this._activeSprite = new Sprite(this.ActivePalette);
using (FileStream spritestream = File.OpenRead(filepath))
{
while (spritestream.Position < spritestream.Length)
{
SpriteFrame sf = new SpriteFrame(spr);
SprDataHandlers.SprStreamToSpriteFrame(sf, spritestream);
sf.ImageBmp = SprDataHandlers.FrameSprToBmp(sf, this.ActivePalette);
spr.Frames.Add(sf);
}
}
spr.Resource.FileName = Path.GetFileName(filepath);
spr.SpriteId = Path.GetFileNameWithoutExtension(filepath);
DataView dv = this.ActiveGameSet.GetSpriteDataView(spr.SpriteId);
spr.SetSpriteDataView(dv);
this.ActiveSprite = spr;
}