public byte[] GenerateIconFile()
{
int[] sizes = this.bitmaps.Keys.OrderBy(i => i).ToArray();
if (sizes.Length == 0)
{
throw new InvalidOperationException("Cannot generate empty icon file.");
}
List <byte> imageBytes = new List <byte>();
List <int> startingPositions = new List <int>();
int startingPosition = 6 + 16 * sizes.Length; // ico header is 6 bytes and each file header is 16 bytes.
List <byte> icoHeader = new List <byte>();
List <byte> pngHeaders = new List <byte>();
List <byte> pngPayloads = new List <byte>();
ToLittleEndian(0, 2, icoHeader); // first two bytes are always 0
ToLittleEndian(1, 2, icoHeader); // 1 for ICO format (2 is CUR)
ToLittleEndian(sizes.Length, 2, icoHeader); // number of files
foreach (int size in sizes)
{
SystemBitmap originalImage = this.bitmaps[size];
int width = originalImage.Width;
int height = originalImage.Height;
int x = (size - width) / 2;
int y = (size - height) / 2;
SystemBitmap resource = new SystemBitmap(size, size);
SystemBitmap.Graphics g = resource.MakeGraphics();
g.Blit(originalImage, x, y);
g.Cleanup();
byte[] pngBytes = resource.SaveBytes(ImageFormat.PNG);
pngPayloads.AddRange(pngBytes);
ToLittleEndian(size == 256 ? 0 : size, 1, pngHeaders);
ToLittleEndian(size == 256 ? 0 : size, 1, pngHeaders);
ToLittleEndian(0, 1, pngHeaders); // 0 for not using a color palette
ToLittleEndian(0, 1, pngHeaders); // reserved, always 0
ToLittleEndian(0, 2, pngHeaders); // 0 color planes.
ToLittleEndian(32, 2, pngHeaders); // 32 bits per pixel
ToLittleEndian(pngBytes.Length, 4, pngHeaders); // file size in bytes
ToLittleEndian(startingPosition, 4, pngHeaders); // byte position from the beginning of the file
startingPosition += pngBytes.Length;
}
List <byte> finalOutput = icoHeader;
finalOutput.AddRange(pngHeaders);
finalOutput.AddRange(pngPayloads);
return(finalOutput.ToArray());
}
public IconSetGenerator AddInputImage(SystemBitmap bmp)
{
if (bmp.Width != bmp.Height)
{
int size = Math.Max(bmp.Width, bmp.Height);
SystemBitmap newBmp = new SystemBitmap(size, size);
this.ownedBitmapReferences.Add(newBmp);
SystemBitmap.Graphics g = newBmp.MakeGraphics();
int x = (size - bmp.Width) / 2;
int y = (size - bmp.Height) / 2;
g.Blit(bmp, x, y);
g.Cleanup();
bmp = newBmp;
}
this.bitmaps.Add(bmp);
this.bitmapMaxDimenion.Add(Math.Max(bmp.Width, bmp.Height));
return(this);
}
public Dictionary <int, SystemBitmap> Generate()
{
Dictionary <int, SystemBitmap> lookup = new Dictionary <int, SystemBitmap>();
SystemBitmap[] sources = this.bitmaps.OrderBy(b => - b.Width).ToArray();
foreach (int desiredSize in this.outputSizes)
{
SystemBitmap source = this.FindBestMatch(sources, desiredSize);
SystemBitmap bmp = new SystemBitmap(desiredSize, desiredSize);
SystemBitmap.Graphics g = bmp.MakeGraphics();
g.Blit(source, 0, 0, desiredSize, desiredSize);
g.Cleanup();
lookup.Add(desiredSize, bmp);
}
this.Cleanup();
return(lookup);
}
