static void Main(string[] args)
{
int width = int.Parse(args[0]);
int height = int.Parse(args[1]);
int colors = int.Parse(args[2]);
string path = args[3];
using (FileStream fs = new FileStream(path, FileMode.Create)) {
GIF gif = new GIF()
{
Output = fs,
ScreenWidth = width,
ScreenHeight = height,
GlobalColorTable = new GIF.ColorTable()
{
Table = new Color[colors],
},
Debug = true,
};
for (int n = 0; n < colors; ++n)
{
gif.GlobalColorTable.Table[n] = Color.FromArgb(n, n, n);
}
GIF.Image image = new GIF.Image()
{
ImageData = new byte[width * height],
};
for (int n = 0; n < image.ImageData.Length; ++n)
{
image.ImageData[n] = (byte)(n % colors);
}
gif.Begin();
gif.WriteImage(image);
gif.End();
fs.Flush();
}
}
public void TinyGifTest()
{
using (MemoryStream stream = new MemoryStream()) {
GIF gif = new GIF()
{
Output = stream,
ScreenWidth = 1,
ScreenHeight = 1,
GlobalColorTable = new GIF.ColorTable()
{
Table = new Color[2] {
Color.White, Color.Black
}
}
};
gif.Begin();
gif.WriteImage(new GIF.Image()
{
ImageData = new byte[] { 0 },
});
gif.End();
int codeSize = 2;
int clear = 1 << codeSize;
int end = 1 + clear;
byte[] got = stream.ToArray();
byte[] expected = new byte[] {
// 0: Signature
(byte)'G', (byte)'I', (byte)'F', (byte)'8', (byte)'9', (byte)'a',
// 6: Logical screen descriptor
1, 0,
1, 0,
0xF0,
0,
49,
// 13: Global Color Table
0xFF, 0xFF, 0xFF,
0, 0, 0,
// 19: Graphic control extension
0x21, 0xF9, 0x04,
1 << 2, 0, 0, 0,
0,
// 27: Image descriptor
0x2C,
0, 0,
0, 0,
1, 0,
1, 0,
0,
// 37: Image data
// 37: Minimum code size
2,
// 38: Data block
2,
(byte)(clear
| 0 << 3
| (end << 6)),
(byte)(end >> 2),
// 41: Block terminator
0,
// 42: Trailer
0x3B
};
TestUtils.AreEqual(expected, got, "TinyGifTest");
}
}
