internal static Color_ FromBGR(int bgr)
{
Color_ result = Color_.FromArgb(0xFF, (bgr & 0xFF), ((bgr >> 8) & 0xFF), ((bgr >> 16) & 0xFF));
Color_ known = KnownColors.FindColorMatch(result);
return((known.IsEmpty) ? result : known);
}
// methods
public Color_ GetPixel(int x, int y)
{
int argb;
Status s = GDIPlus.GdipBitmapGetPixel(nativeObject, x, y, out argb);
GDIPlus.CheckStatus(s);
return(Color_.FromArgb(argb));
}
internal Bitmap BuildBitmapOnWin32()
{
Bitmap bmp;
if (imageData == null)
{
return(new Bitmap(32, 32));
}
IconImage ii = (IconImage)imageData [id];
BitmapInfoHeader bih = ii.iconHeader;
int biHeight = bih.biHeight / 2;
int ncolors = (int)bih.biClrUsed;
if ((ncolors == 0) && (bih.biBitCount < 24))
{
ncolors = (int)(1 << bih.biBitCount);
}
switch (bih.biBitCount)
{
case 1:
bmp = new Bitmap(bih.biWidth, biHeight, PixelFormat.Format1bppIndexed);
break;
case 4:
bmp = new Bitmap(bih.biWidth, biHeight, PixelFormat.Format4bppIndexed);
break;
case 8:
bmp = new Bitmap(bih.biWidth, biHeight, PixelFormat.Format8bppIndexed);
break;
case 24:
bmp = new Bitmap(bih.biWidth, biHeight, PixelFormat.Format24bppRgb);
break;
case 32:
bmp = new Bitmap(bih.biWidth, biHeight, PixelFormat.Format32bppArgb);
break;
default:
string msg = Locale.GetText("Unexpected number of bits: {0}", bih.biBitCount);
throw new Exception(msg);
}
if (bih.biBitCount < 24)
{
ColorPalette pal = bmp.Palette; // Managed palette
for (int i = 0; i < ii.iconColors.Length; i++)
{
pal.Entries[i] = Color_.FromArgb((int)ii.iconColors[i] | unchecked ((int)0xff000000));
}
bmp.Palette = pal;
}
int bytesPerLine = (int)((((bih.biWidth * bih.biBitCount) + 31) & ~31) >> 3);
BitmapData bits = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.WriteOnly, bmp.PixelFormat);
for (int y = 0; y < biHeight; y++)
{
Marshal.Copy(ii.iconXOR, bytesPerLine * y,
(IntPtr)(bits.Scan0.ToInt64() + bits.Stride * (biHeight - 1 - y)), bytesPerLine);
}
bmp.UnlockBits(bits);
bmp = new Bitmap(bmp); // This makes a 32bpp image out of an indexed one
// Apply the mask to make properly transparent
bytesPerLine = (int)((((bih.biWidth) + 31) & ~31) >> 3);
for (int y = 0; y < biHeight; y++)
{
for (int x = 0; x < bih.biWidth / 8; x++)
{
for (int bit = 7; bit >= 0; bit--)
{
if (((ii.iconAND[y * bytesPerLine + x] >> bit) & 1) != 0)
{
bmp.SetPixel(x * 8 + 7 - bit, biHeight - y - 1, Color_.Transparent);
}
}
}
}
return(bmp);
}
internal static Color_ StaticConvertFromString(ITypeDescriptorContext context, string s, CultureInfo culture)
{
if (culture == null)
{
culture = CultureInfo.InvariantCulture;
}
s = s.Trim();
if (s.Length == 0)
{
return(Color_.Empty);
}
// Try to process both NamedColor and SystemColors from the KnownColor enumeration
if (Char.IsLetter(s [0]))
{
KnownColor kc;
try {
kc = (KnownColor)Enum.Parse(typeof(KnownColor), s, true);
}
catch (Exception e) {
// whatever happens MS throws an basic Exception
string msg = Locale.GetText("Invalid color name '{0}'.", s);
throw new Exception(msg, new FormatException(msg, e));
}
return(KnownColors.FromKnownColor(kc));
}
String numSeparator = culture.TextInfo.ListSeparator;
Color_ result = Color_.Empty;
if (s.IndexOf(numSeparator) == -1)
{
bool sharp = (s[0] == '#');
int start = sharp ? 1 : 0;
bool hex = false;
// deal with #hex, 0xhex and #0xhex
if ((s.Length > start + 1) && (s[start] == '0'))
{
hex = ((s[start + 1] == 'x') || (s[start + 1] == 'X'));
if (hex)
{
start += 2;
}
}
if (sharp || hex)
{
s = s.Substring(start);
int argb;
try {
argb = Int32.Parse(s, NumberStyles.HexNumber);
}
catch (Exception e) {
// whatever happens MS throws an basic Exception
string msg = Locale.GetText("Invalid Int32 value '{0}'.", s);
throw new Exception(msg, e);
}
// note that the default alpha value for a 6 hex digit (i.e. when none are present) is
// 0xFF while shorter string defaults to 0xFF - unless both # an 0x are specified
if ((s.Length < 6) || ((s.Length == 6) && sharp && hex))
{
argb &= 0x00FFFFFF;
}
else if ((argb >> 24) == 0)
{
argb |= unchecked ((int)0xFF000000);
}
result = Color_.FromArgb(argb);
}
}
if (result.IsEmpty)
{
Int32Converter converter = new Int32Converter();
String [] components = s.Split(numSeparator.ToCharArray());
// MS seems to convert the indivual component to int before
// checking the number of components
int[] numComponents = new int[components.Length];
for (int i = 0; i < numComponents.Length; i++)
{
numComponents[i] = (int)converter.ConvertFrom(context,
culture, components[i]);
}
switch (components.Length)
{
case 1:
result = Color_.FromArgb(numComponents[0]);
break;
case 3:
result = Color_.FromArgb(numComponents[0], numComponents[1],
numComponents[2]);
break;
case 4:
result = Color_.FromArgb(numComponents[0], numComponents[1],
numComponents[2], numComponents[3]);
break;
default:
throw new ArgumentException(s + " is not a valid color value.");
}
}
if (!result.IsEmpty)
{
// Look for a named or system color with those values
Color_ known = KnownColors.FindColorMatch(result);
if (!known.IsEmpty)
{
return(known);
}
}
return(result);
}