private Bitmap GetBitmap(int index, ImageListDrawItemConstants flags)
{
var bitmapSize = GetImageListIconSize();
var bitmap = new Bitmap(bitmapSize.Width, bitmapSize.Height);
using (var g = Graphics.FromImage(bitmap))
{
try
{
g.FillRectangle(Brushes.White, new Rectangle(0, 0, bitmapSize.Width, bitmapSize.Height));
var hdc = g.GetHdc();
var pimldp = new NativeMethods.IMAGELISTDRAWPARAMS {
hdcDst = hdc
};
pimldp.cbSize = Marshal.SizeOf(pimldp.GetType());
pimldp.i = index;
pimldp.x = 0;
pimldp.y = 0;
pimldp.cx = bitmapSize.Width;
pimldp.cy = bitmapSize.Height;
pimldp.fStyle = (int)flags;
if (_iImageList == null || Thread.CurrentThread.GetApartmentState() == ApartmentState.MTA)
{
NativeMethods.ImageList_DrawIndirect(ref pimldp);
}
else
{
_iImageList.Draw(ref pimldp);
}
}
finally
{
g.ReleaseHdc();
}
}
bitmap.MakeTransparent();
return(bitmap);
}
private Bitmap GetBitmap(int index, ImageListDrawItemConstants flags)
{
var bitmapSize = GetImageListIconSize();
var bitmap = new Bitmap(bitmapSize.Width, bitmapSize.Height);
using (var g = Graphics.FromImage(bitmap))
{
try
{
g.FillRectangle(Brushes.White, new Rectangle(0, 0, bitmapSize.Width, bitmapSize.Height));
var hdc = g.GetHdc();
var pimldp = new NativeMethods.IMAGELISTDRAWPARAMS { hdcDst = hdc };
pimldp.cbSize = Marshal.SizeOf(pimldp.GetType());
pimldp.i = index;
pimldp.x = 0;
pimldp.y = 0;
pimldp.cx = bitmapSize.Width;
pimldp.cy = bitmapSize.Height;
pimldp.fStyle = (int)flags;
if (_iImageList == null || Thread.CurrentThread.GetApartmentState() == ApartmentState.MTA)
{
NativeMethods.ImageList_DrawIndirect(ref pimldp);
}
else
{
_iImageList.Draw(ref pimldp);
}
}
finally
{
g.ReleaseHdc();
}
}
bitmap.MakeTransparent();
return bitmap;
}
public static void DrawImage(Graphics graphics, Image image, Point point, bool disabled)
{
if (!disabled)
{
Rectangle destination = new Rectangle(point, image.Size);
graphics.DrawImage(image, destination, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
}
else
{
// Painting a disabled gray scale image is done using ILS_SATURATE on WinXP.
// This code emulates that behaviour if comctl32 version 6 is not availble.
NativeMethods.DLLVERSIONINFO dvi = new NativeMethods.DLLVERSIONINFO();
dvi.cbSize = Marshal.SizeOf(typeof(NativeMethods.DLLVERSIONINFO));
NativeMethods.DllGetVersion(ref dvi);
if (dvi.dwMajorVersion < 6)
{
ImageAttributes attributes = new ImageAttributes();
Rectangle destination = new Rectangle(point, image.Size);
float[][] matrix = new float[5][];
matrix[0] = new float[] { 0.2222f, 0.2222f, 0.2222f, 0.0000f, 0.0000f };
matrix[1] = new float[] { 0.2222f, 0.2222f, 0.2222f, 0.0000f, 0.0000f };
matrix[2] = new float[] { 0.2222f, 0.2222f, 0.2222f, 0.0000f, 0.0000f };
matrix[3] = new float[] { 0.3333f, 0.3333f, 0.3333f, 0.7500f, 0.0000f };
matrix[4] = new float[] { 0.0000f, 0.0000f, 0.0000f, 0.0000f, 1.0000f };
attributes.SetColorMatrix(new ColorMatrix(matrix));
graphics.DrawImage(image, destination, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attributes);
}
else
{
ImageList imageList = new ImageList();
imageList.ImageSize = image.Size;
imageList.ColorDepth = ColorDepth.Depth32Bit;
imageList.Images.Add(image);
IntPtr hdc = graphics.GetHdc();
NativeMethods.IMAGELISTDRAWPARAMS ildp = new NativeMethods.IMAGELISTDRAWPARAMS();
ildp.cbSize = Marshal.SizeOf(typeof(NativeMethods.IMAGELISTDRAWPARAMS));
ildp.himl = imageList.Handle;
ildp.i = 0; // image index
ildp.hdcDst = hdc;
ildp.x = point.X;
ildp.y = point.Y;
ildp.cx = 0;
ildp.cy = 0;
ildp.xBitmap = 0;
ildp.yBitmap = 0;
ildp.fStyle = NativeMethods.ILD_TRANSPARENT;
ildp.fState = NativeMethods.ILS_SATURATE;
ildp.Frame = -100;
NativeMethods.ImageList_DrawIndirect(ref ildp);
graphics.ReleaseHdc(hdc);
}
}
}
