public static extern bool ImageList_GetImageInfo(HandleRef himl, int i, System.Windows.Forms.NativeMethods.IMAGEINFO pImageInfo);
private Bitmap GetBitmap(int index)
{
if ((index < 0) || (index >= this.Images.Count))
{
throw new ArgumentOutOfRangeException("index", System.Windows.Forms.SR.GetString("InvalidArgument", new object[] { "index", index.ToString(CultureInfo.CurrentCulture) }));
}
Bitmap image = null;
if (this.ColorDepth == System.Windows.Forms.ColorDepth.Depth32Bit)
{
System.Windows.Forms.NativeMethods.IMAGEINFO pImageInfo = new System.Windows.Forms.NativeMethods.IMAGEINFO();
if (System.Windows.Forms.SafeNativeMethods.ImageList_GetImageInfo(new HandleRef(this, this.Handle), index, pImageInfo))
{
Bitmap bitmap2 = null;
BitmapData bmpData = null;
BitmapData targetData = null;
System.Windows.Forms.IntSecurity.ObjectFromWin32Handle.Assert();
try
{
bitmap2 = Image.FromHbitmap(pImageInfo.hbmImage);
bmpData = bitmap2.LockBits(new Rectangle(pImageInfo.rcImage_left, pImageInfo.rcImage_top, pImageInfo.rcImage_right - pImageInfo.rcImage_left, pImageInfo.rcImage_bottom - pImageInfo.rcImage_top), ImageLockMode.ReadOnly, bitmap2.PixelFormat);
int stride = bmpData.Stride;
int height = this.imageSize.Height;
if (BitmapHasAlpha(bmpData))
{
image = new Bitmap(this.imageSize.Width, this.imageSize.Height, PixelFormat.Format32bppArgb);
targetData = image.LockBits(new Rectangle(0, 0, this.imageSize.Width, this.imageSize.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
this.CopyBitmapData(bmpData, targetData);
}
}
finally
{
CodeAccessPermission.RevertAssert();
if (bitmap2 != null)
{
if (bmpData != null)
{
bitmap2.UnlockBits(bmpData);
}
bitmap2.Dispose();
}
if ((image != null) && (targetData != null))
{
image.UnlockBits(targetData);
}
}
}
}
if (image == null)
{
image = new Bitmap(this.imageSize.Width, this.imageSize.Height);
using (Graphics graphics = Graphics.FromImage(image))
{
IntPtr hdc = graphics.GetHdc();
try
{
System.Windows.Forms.SafeNativeMethods.ImageList_DrawEx(new HandleRef(this, this.Handle), index, new HandleRef(graphics, hdc), 0, 0, this.imageSize.Width, this.imageSize.Height, -1, -1, 1);
}
finally
{
graphics.ReleaseHdcInternal(hdc);
}
}
}
image.MakeTransparent(fakeTransparencyColor);
return(image);
}
private Bitmap GetBitmap(int index)
{
if ((index < 0) || (index >= this.Images.Count))
{
throw new ArgumentOutOfRangeException("index", System.Windows.Forms.SR.GetString("InvalidArgument", new object[] { "index", index.ToString(CultureInfo.CurrentCulture) }));
}
Bitmap image = null;
if (this.ColorDepth == System.Windows.Forms.ColorDepth.Depth32Bit)
{
System.Windows.Forms.NativeMethods.IMAGEINFO pImageInfo = new System.Windows.Forms.NativeMethods.IMAGEINFO();
if (System.Windows.Forms.SafeNativeMethods.ImageList_GetImageInfo(new HandleRef(this, this.Handle), index, pImageInfo))
{
Bitmap bitmap2 = null;
BitmapData bmpData = null;
BitmapData targetData = null;
System.Windows.Forms.IntSecurity.ObjectFromWin32Handle.Assert();
try
{
bitmap2 = Image.FromHbitmap(pImageInfo.hbmImage);
bmpData = bitmap2.LockBits(new Rectangle(pImageInfo.rcImage_left, pImageInfo.rcImage_top, pImageInfo.rcImage_right - pImageInfo.rcImage_left, pImageInfo.rcImage_bottom - pImageInfo.rcImage_top), ImageLockMode.ReadOnly, bitmap2.PixelFormat);
int stride = bmpData.Stride;
int height = this.imageSize.Height;
if (BitmapHasAlpha(bmpData))
{
image = new Bitmap(this.imageSize.Width, this.imageSize.Height, PixelFormat.Format32bppArgb);
targetData = image.LockBits(new Rectangle(0, 0, this.imageSize.Width, this.imageSize.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
this.CopyBitmapData(bmpData, targetData);
}
}
finally
{
CodeAccessPermission.RevertAssert();
if (bitmap2 != null)
{
if (bmpData != null)
{
bitmap2.UnlockBits(bmpData);
}
bitmap2.Dispose();
}
if ((image != null) && (targetData != null))
{
image.UnlockBits(targetData);
}
}
}
}
if (image == null)
{
image = new Bitmap(this.imageSize.Width, this.imageSize.Height);
using (Graphics graphics = Graphics.FromImage(image))
{
IntPtr hdc = graphics.GetHdc();
try
{
System.Windows.Forms.SafeNativeMethods.ImageList_DrawEx(new HandleRef(this, this.Handle), index, new HandleRef(graphics, hdc), 0, 0, this.imageSize.Width, this.imageSize.Height, -1, -1, 1);
}
finally
{
graphics.ReleaseHdcInternal(hdc);
}
}
}
image.MakeTransparent(fakeTransparencyColor);
return image;
}
