unsafe Form1.frame transcode(Bitmap b, Form1.frame oldframe)
{
Form1.frame f = new Form1.frame();
f.OldVersion = oldframe;
f.W = (ushort)b.Width;
f.H = (ushort)b.Height;
f.X = oldframe.X;
f.Y = oldframe.Y;
f.Raw = new byte[f.W * f.H];
var d = b.LockBits(new Rectangle(0, 0, f.W, f.H), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
try
{
for (int y = 0; y < d.Height; y++)
{
int *ptr = (int *)(d.Scan0 + d.Stride * y);
for (int x = 0; x < d.Width; x++)
{
int pixel = *ptr++;
if (colorToIndex.TryGetValue(pixel, out byte idx))
{
f.Raw[x + f.W * y] = idx;
}
else
{
if (MessageBox.Show(string.Format("Unknown color {0:X8} at ({1},{2})", pixel, x, y), "Unknown color", MessageBoxButtons.OKCancel) == DialogResult.Cancel)
{
return(null);
}
}
}
}
}
finally
{
b.UnlockBits(d);
}
return(f);
}
unsafe void rerender(bool noReset = false)
{
if (!noReset)
{
spriteSavedLabel.Hide();
replacementFrame = null;
pictureBox2.Image = null;
button3.Enabled = false;
}
int rx = comboBox1.SelectedIndex + 2;
int index = (int)numericUpDown1.Value;
if (index >= Form1.allRX[rx].Length ||
Form1.allRX[rx][index] == null)
{
pictureBox1.Image = null;
button1.Enabled = false;
button2.Enabled = false;
}
else
{
button1.Enabled = true;
button2.Enabled = true;
pictureBox1.Image = null;
var d = buffer.LockBits(new Rectangle(0, 0, 400, 400), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
for (int i = 0; i < d.Height; i++)
{
int *ptr = (int *)(d.Scan0 + i * d.Stride);
for (int j = 0; j < d.Width; j++)
{
*ptr++ = 0;
}
}
Form1.drawSprite(d, rx, (short)index, 0, 0);
buffer.UnlockBits(d);
pictureBox1.Image = buffer;
}
}
void saveIndexedPNG(Stream fs, Form1.frame sprite)
{
MemoryStream ms = new MemoryStream();
BinaryWriter w = new BinaryWriter(ms);
w.Write(0x474E5089);
w.Write(0x0A1A0A0D);
// IHDR
w.Write(toBE(13));
long pos = ms.Position;
w.Write(0x52444849);
w.Write(toBE(sprite.W));
w.Write(toBE(sprite.H));
w.Write((byte)8);
w.Write((byte)3);
w.Write((byte)0);
w.Write((byte)0);
w.Write((byte)0);
w.Write(toBE(CRC(ms, pos, ms.Position)));
// PLTE
w.Write(toBE(3 * 256));
pos = ms.Position;
w.Write(0x45544C50);
w.Write((byte)0xff);
w.Write((byte)0);
w.Write((byte)0xff);
for (int i = 1; i < pal.Length; i++)
{
w.Write((byte)(pal[i] >> 16));
w.Write((byte)(pal[i] >> 8));
w.Write((byte)(pal[i]));
}
w.Write(toBE(CRC(ms, pos, ms.Position)));
// tRNS
w.Write(toBE(1));
pos = ms.Position;
w.Write(0x534E5274);
w.Write((byte)0);
w.Write(toBE(CRC(ms, pos, ms.Position)));
MemoryStream pixeldata = new MemoryStream();
for (int y = 0; y < sprite.H; y++)
{
pixeldata.WriteByte(0);
pixeldata.Write(sprite.Raw, y * sprite.W, sprite.W);
}
pixeldata.Position = 0;
MemoryStream compressedPixels = new MemoryStream();
compressedPixels.WriteByte(0x78);
compressedPixels.WriteByte(0x5E);
var c = new System.IO.Compression.DeflateStream(compressedPixels, System.IO.Compression.CompressionMode.Compress, true);
pixeldata.CopyTo(c);
c.Close();
compressedPixels.Position = 0;
// IDAT
w.Write(toBE((int)compressedPixels.Length));
pos = ms.Position;
w.Write(0x54414449);
compressedPixels.CopyTo(ms);
w.Write(toBE(CRC(ms, pos, ms.Position)));
// IEND
w.Write(0);
w.Write(0x444E4549);
w.Write(0x826042AE);
ms.Position = 0;
ms.CopyTo(fs);
fs.Close();
}