private static byte[] RemoveAlphaLayerBytes(byte[] imageBytes, System.Drawing.Imaging.PixelFormat pixelFormat)
{
// Check if has a transparency layer
if (pixelFormat.ToString().ToLower().EndsWith("argb"))
{
// Skip last byte (padding) - contents may vary per platform
return(imageBytes.Where((b, i) => i % 4 != 3).ToArray());
}
return(imageBytes);
}
public static PixelFormat GetImagePixelFormat(System.Drawing.Imaging.PixelFormat pixelformat)
{
if (BitConverter.IsLittleEndian == false)
{
throw new NotSupportedException("Bigendian");
}
switch (pixelformat)
{
case System.Drawing.Imaging.PixelFormat.Format24bppRgb:
return(PixelFormat.Bgr);
case System.Drawing.Imaging.PixelFormat.Format32bppArgb:
return(PixelFormat.Bgra);
default:
throw new NotSupportedException(pixelformat.ToString());
}
}
public static int GetComponentCount(this System.Drawing.Imaging.PixelFormat pixelFormat)
{
switch (pixelFormat)
{
case System.Drawing.Imaging.PixelFormat.Alpha:
case System.Drawing.Imaging.PixelFormat.PAlpha:
case System.Drawing.Imaging.PixelFormat.Format8bppIndexed:
return(1);
case System.Drawing.Imaging.PixelFormat.Format16bppGrayScale:
case System.Drawing.Imaging.PixelFormat.Format16bppRgb555:
case System.Drawing.Imaging.PixelFormat.Format16bppRgb565:
case System.Drawing.Imaging.PixelFormat.Format16bppArgb1555:
return(2);
case System.Drawing.Imaging.PixelFormat.Format24bppRgb:
return(3);
case System.Drawing.Imaging.PixelFormat.Canonical:
case System.Drawing.Imaging.PixelFormat.Format32bppArgb:
case System.Drawing.Imaging.PixelFormat.Format32bppPArgb:
case System.Drawing.Imaging.PixelFormat.Format32bppRgb:
return(4);
case System.Drawing.Imaging.PixelFormat.Format48bppRgb:
return(6);
case System.Drawing.Imaging.PixelFormat.Format64bppArgb:
case System.Drawing.Imaging.PixelFormat.Format64bppPArgb:
return(8);
case System.Drawing.Imaging.PixelFormat.Format1bppIndexed:
case System.Drawing.Imaging.PixelFormat.Extended:
case System.Drawing.Imaging.PixelFormat.Format4bppIndexed:
case System.Drawing.Imaging.PixelFormat.Gdi:
case System.Drawing.Imaging.PixelFormat.Indexed:
case System.Drawing.Imaging.PixelFormat.Max:
case System.Drawing.Imaging.PixelFormat.Undefined:
default:
throw new InvalidEnumArgumentException(pixelFormat.ToString());
}
}
private static PixelFormat MapPixelFormat(System.Drawing.Imaging.PixelFormat pixelFormat)
{
switch (pixelFormat)
{
case System.Drawing.Imaging.PixelFormat.Alpha: return(PixelFormat.Alpha);
case System.Drawing.Imaging.PixelFormat.Canonical: return(PixelFormat.Bgra);
case System.Drawing.Imaging.PixelFormat.Format24bppRgb: return(PixelFormat.Bgr);
case System.Drawing.Imaging.PixelFormat.Format32bppPArgb:
case System.Drawing.Imaging.PixelFormat.Format32bppArgb: return(PixelFormat.Bgra);
case System.Drawing.Imaging.PixelFormat.Format48bppRgb: return(PixelFormat.Bgr);
case System.Drawing.Imaging.PixelFormat.Format64bppPArgb:
case System.Drawing.Imaging.PixelFormat.Format64bppArgb: return(PixelFormat.Bgra);
default: throw new ArgumentException("Unsupported pixel format: " + pixelFormat.ToString());
}
}
//------------------------------------------------------
// Helpers
//------------------------------------------------------
private void getImageFormat(System.Drawing.Imaging.PixelFormat bitmap_format, ref PixelInternalFormat pif, ref PixelFormat pf, ref PixelType pt)
{
switch (bitmap_format)
{
case System.Drawing.Imaging.PixelFormat.Format8bppIndexed: // misses glColorTable setup
pif = PixelInternalFormat.Rgb8;
pf = PixelFormat.ColorIndex;
pt = PixelType.Bitmap;
break;
case System.Drawing.Imaging.PixelFormat.Format16bppArgb1555:
case System.Drawing.Imaging.PixelFormat.Format16bppRgb555: // does not work
pif = PixelInternalFormat.Rgb5A1;
pf = PixelFormat.Bgr;
pt = PixelType.UnsignedShort5551Ext;
break;
//case System.Drawing.Imaging.PixelFormat.Format16bppRgb565:
// pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.R5G6B5IccSgix;
// pf = OpenTK.Graphics.OpenGL.PixelFormat.R5G6B5IccSgix;
// pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedByte;
// break;
case System.Drawing.Imaging.PixelFormat.Format24bppRgb: // works
pif = PixelInternalFormat.Rgb8;
pf = PixelFormat.Bgr;
pt = PixelType.UnsignedByte;
break;
case System.Drawing.Imaging.PixelFormat.Format32bppRgb: // has alpha too? wtf?
case System.Drawing.Imaging.PixelFormat.Canonical:
case System.Drawing.Imaging.PixelFormat.Format32bppArgb: // works
pif = PixelInternalFormat.Rgba;
pf = PixelFormat.Bgra;
pt = PixelType.UnsignedByte;
break;
default:
throw new Exception("Unsupported Pixel Format: " + bitmap_format.ToString());
}
}
private void btn导入图像_Click(object sender, EventArgs e)
{
if (pictureBox1.Image == null)
{
return;
}
OpenFileDialog ofd = new OpenFileDialog();
if (!ofd.ShowDialog().Equals(DialogResult.OK))
{
return;
}
Bitmap imb;
try
{
imb = new Bitmap(ofd.FileName);
if (imb.PixelFormat != culfmt)
{
throw new Exception("格式不符，输入图像必须是" + culfmt.ToString() + "\nFormat Error");
}
if (imb.Width != w || imb.Height != h)
{
throw new Exception("大小不符" + "\nSize Error");
}
}
catch (Exception error)
{
MessageBox.Show(error.Message);
return;
}
if (culfmt == System.Drawing.Imaging.PixelFormat.Format8bppIndexed)
{
save8Bit(imb);
}
}
/// <summary>
/// Convert from PixelFormat to System.Windows.Media.PixelFormat
/// </summary>
/// <param name="pixelFormat"></param>
/// <exception cref="NotSupportedException">Convertion is not available</exception>
/// <returns></returns>
public static System.Windows.Media.PixelFormat Convert(this PixelFormat pixelFormat)
{
if (pixelFormat == PixelFormat.Format16bppGrayScale)
{
return(PixelFormats.Gray16);
}
if (pixelFormat == PixelFormat.Format16bppRgb555)
{
return(PixelFormats.Bgr555);
}
if (pixelFormat == PixelFormat.Format16bppRgb565)
{
return(PixelFormats.Bgr565);
}
if (pixelFormat == PixelFormat.Indexed)
{
return(PixelFormats.Bgr101010);
}
if (pixelFormat == PixelFormat.Format1bppIndexed)
{
return(PixelFormats.Indexed1);
}
if (pixelFormat == PixelFormat.Format4bppIndexed)
{
return(PixelFormats.Indexed4);
}
if (pixelFormat == PixelFormat.Format8bppIndexed)
{
return(PixelFormats.Indexed8);
}
if (pixelFormat == PixelFormat.Format24bppRgb)
{
return(PixelFormats.Bgr24);
}
if (pixelFormat == PixelFormat.Format32bppArgb)
{
return(PixelFormats.Bgr32);
}
if (pixelFormat == PixelFormat.Format32bppPArgb)
{
return(PixelFormats.Pbgra32);
}
if (pixelFormat == PixelFormat.Format32bppRgb)
{
return(PixelFormats.Bgr32);
}
if (pixelFormat == PixelFormat.Format48bppRgb)
{
return(PixelFormats.Rgb48);
}
if (pixelFormat == PixelFormat.Format64bppArgb)
{
return(PixelFormats.Prgba64);
}
if (pixelFormat == PixelFormat.Undefined)
{
return(PixelFormats.Default);
}
throw new NotSupportedException("Convertion not supported with " + pixelFormat.ToString());
}