private PixelFormat ConvertPixelFormat(System.Drawing.Imaging.PixelFormat sourceFormat)
{
switch (sourceFormat)
{
case System.Drawing.Imaging.PixelFormat.Format24bppRgb:
return(PixelFormats.Bgr24);
case System.Drawing.Imaging.PixelFormat.Format32bppPArgb:
return(PixelFormats.Pbgra32);
case System.Drawing.Imaging.PixelFormat.Format32bppArgb:
return(PixelFormats.Bgra32);
case System.Drawing.Imaging.PixelFormat.Format32bppRgb:
return(PixelFormats.Bgr32);
case System.Drawing.Imaging.PixelFormat.Format16bppRgb555:
return(PixelFormats.Bgr555);
case System.Drawing.Imaging.PixelFormat.Format16bppRgb565:
return(PixelFormats.Bgr565);
case System.Drawing.Imaging.PixelFormat.Format8bppIndexed:
return(PixelFormats.Indexed8);
// .. add more if needed
}
return(new PixelFormat());
}
private static PixelFormat ConvertBmpPixelFormat(System.Drawing.Imaging.PixelFormat pixelformat)
{
var pixelFormats = PixelFormats.Default;
switch (pixelformat)
{
case System.Drawing.Imaging.PixelFormat.Format32bppArgb:
pixelFormats = PixelFormats.Bgra32;
break;
case System.Drawing.Imaging.PixelFormat.Format8bppIndexed:
pixelFormats = PixelFormats.Gray8;
break;
case System.Drawing.Imaging.PixelFormat.Format16bppGrayScale:
pixelFormats = PixelFormats.Gray16;
break;
case System.Drawing.Imaging.PixelFormat.Format16bppRgb555:
pixelFormats = PixelFormats.Bgr555;
break;
}
return(pixelFormats);
}
private static PixelFormat ConvertPixelFormat(
System.Drawing.Imaging.PixelFormat sourceFormat)
{
switch (sourceFormat)
{
case System.Drawing.Imaging.PixelFormat.Format24bppRgb:
return(PixelFormats.Bgr24);
case System.Drawing.Imaging.PixelFormat.Format32bppArgb:
return(PixelFormats.Bgra32);
case System.Drawing.Imaging.PixelFormat.Format32bppRgb:
return(PixelFormats.Bgr32);
}
return(new PixelFormat());
}
/// <summary>
/// Конвертация Bitmap в другой формат Bitmap.
/// </summary>
/// <param name="source">Источник для конвертации.</param>
/// <param name="destinationFormat">Новый формат.</param>
/// <param name="destinationPalette">
/// Палитра для нового формата, если конечно она нужна для нового формата, иначе передать null.
/// </param>
/// <returns>Bitmap в новом формате.</returns>
public static Bitmap ConvertTo(
this Bitmap source,
System.Drawing.Imaging.PixelFormat destinationFormat,
ColorPalette destinationPalette)
{
var result =
new Bitmap(source.Width, source.Height, destinationFormat);
if (destinationPalette != null)
{
result.Palette = destinationPalette;
}
using (Graphics g = Graphics.FromImage(result))
g.DrawImage(source, 0, 0);
return(result);
}
/// <summary>
/// Конструктор копирует пиксели из заданного битмапа.
/// </summary>
/// <param name="source">Исходный битмап.</param>
public BitmapWrapperKW(Bitmap source)
{
_dpiX = source.HorizontalResolution;
_dpiY = source.VerticalResolution;
_height = source.Height;
_width = source.Width;
System.Drawing.Imaging.PixelFormat pf = source.PixelFormat;
if (pf != System.Drawing.Imaging.PixelFormat.Format32bppArgb)
{
source = source.ConvertTo(System.Drawing.Imaging.PixelFormat.Format32bppArgb, null);
}
_pixels = new byte[_width * _height * 4];
BitmapData bmData = source.LockBits(
new Rectangle(0, 0, _width, _height),
ImageLockMode.ReadWrite,
System.Drawing.Imaging.PixelFormat.Format32bppArgb
);
int strideBm = bmData.Stride;
IntPtr scan = bmData.Scan0;
//TODO: сделать без unsafe
unsafe
{
var p = (byte *)(void *)scan;
int offset = 0;
for (int j = 0; j < _height; j++)
{
int offsetBm = strideBm * j;
for (int i = 0; i < _width; i++)
{
_pixels[offset++] = p[offsetBm++]; //blue
_pixels[offset++] = p[offsetBm++]; //green
_pixels[offset++] = p[offsetBm++]; //red
_pixels[offset++] = p[offsetBm++]; //alfa
}
}
}
source.UnlockBits(bmData);
}
