/// <summary>
/// Draws the specified <see cref="BitmapEx"/> object at the specified location and with the original size.
/// </summary>
/// <param name="image"><see cref="BitmapEx"/> object to draw.</param>
/// <param name="x">x-coordinate of the upper-left corner of the drawn image.</param>
/// <param name="y">y-coordinate of the upper-top corner of the drawn image.</param>
public void DrawImage(BitmapEx image, int x, int y)
{
IntPtr hdcMem = GDIPlus.CreateCompatibleDC(hDC);
IntPtr hOldSel = GDIPlus.SelectObject(hdcMem, image.hBitmap);
GDIPlus.BitBlt(hDC, x, y, image.Width, image.Height, hdcMem, 0, 0, GDIPlus.SRCCOPY);
GDIPlus.SelectObject(hdcMem, hOldSel);
GDIPlus.DeleteDC(hdcMem);
}
/// <summary>
/// Draws the specified portion of the specified System.Drawing.Image object at the specified location and with the specified size.
/// </summary>
/// <param name="image"><see cref="OpenNETCF.Drawing.BitmapEx"/> object to draw.</param>
/// <param name="destRect"><see cref="Rectangle"/> structure that specifies the location and size of the drawn image.
/// The image is scaled to fit the rectangle.</param>
/// <param name="srcRect"><see cref="Rectangle"/> structure that specifies the portion of the image object to draw.</param>
public void DrawImage(BitmapEx image, Rectangle destRect, Rectangle srcRect)
{
IntPtr hdcMem = GDIPlus.CreateCompatibleDC(hDC);
IntPtr hOldSel = GDIPlus.SelectObject(hdcMem, image.hBitmap);
//GDIPlus.BitBlt(hDC, 0, 0, image.Width, image.Height, hdcMem, 0, 0, GDIPlus.SRCCOPY);
GDIPlus.StretchBlt(hDC, destRect.Left, destRect.Top, destRect.Width, destRect.Height, hdcMem, srcRect.Left, srcRect.Top, srcRect.Width, srcRect.Height, GDIPlus.SRCCOPY);
GDIPlus.SelectObject(hdcMem, hOldSel);
GDIPlus.DeleteDC(hdcMem);
}
public static IntPtr BitmapLockBits(BitmapEx bitmap, int flags, int format, BitmapData bitmapData)
{
IntPtr hDC = GetDC(IntPtr.Zero);
BITMAPINFOHEADER bi = new BITMAPINFOHEADER();
bi.biSize = (uint)Marshal.SizeOf(bi);
//For now they are all converted to 24 bits
bi.biBitCount = 24; // Creating RGB bitmap. The following three members don't matter
//bi.biBitCount = (ushort)bitmap.bitsPixel;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
if (bi.biBitCount == 16 || bi.biBitCount == 32)
{
bi.biCompression = BI_BITFIELDS;
}
else
{
bi.biCompression = BI_RGB;
}
//bi.biCompression = 0;
bi.biHeight = bitmap.Height;
bi.biWidth = bitmap.Width;
bi.biPlanes = 1;
int cb = (int)(bi.biHeight * bi.biWidth * bi.biBitCount / 8); //8 is bits per byte
//bi.biSizeImage = (uint)cb;
bi.biSizeImage = (uint)(BytesPerLine(bi.biBitCount, bitmap.Width) * bitmap.Height);
bi.biXPelsPerMeter = 0xb12; // 72 ppi, 96 would work well too
bi.biYPelsPerMeter = 0xb12; // 72 ppi
IntPtr pBits = IntPtr.Zero;
//Allocate memory for bitmap bits
IntPtr pBI = LocalAlloc(GPTR, (int)bi.biSize);
// Not sure if this needed - simply trying to keep marshaller happy
Marshal.StructureToPtr(bi, pBI, false);
//This will return IntPtr to actual DIB bits in pBits
IntPtr hBmp = CreateDIBSection(hDC, pBI, 0, ref pBits, IntPtr.Zero, 0);
//Marshall back - now we have BITMAPINFOHEADER correctly filled in
Marshal.PtrToStructure(pBI, bi);
BITMAPINFOHEADER biNew = (BITMAPINFOHEADER)Marshal.PtrToStructure(pBI, typeof(BITMAPINFOHEADER));
IntPtr hMemDC = CreateCompatibleDC(hDC);
IntPtr hTargetDC = CreateCompatibleDC(hDC);
//Usual stuff
IntPtr hOldBitmap1 = SelectObject(hMemDC, bitmap.hBitmap);
IntPtr hOldBitmap2 = SelectObject(hTargetDC, hBmp);
//Grab bitmap
int nRet = BitBlt(hTargetDC, 0, 0, bitmap.Width, bitmap.Height, hMemDC, 0, 0, SRCCOPY);
bitmapData.Height = bitmap.Height;
bitmapData.Width = bitmap.Width;
bitmapData.Scan0 = pBits;
bitmapData.Stride = BytesPerLine(biNew.biBitCount, bitmap.Width);
//Restore
SelectObject(hMemDC, hOldBitmap1);
SelectObject(hTargetDC, hOldBitmap2);
//Clean up
DeleteDC(hMemDC);
DeleteDC(hTargetDC);
return(hBmp);
}
