static protected byte[] CreateEmptyBitmap(int width, int height, ushort bpp, uint imageSize, out uint headerSize)
{
BITMAPINFO bi = new BITMAPINFO();
bi.biSize = (uint)Marshal.SizeOf(bi);
bi.biBitCount = bpp; // bit depth
bi.biClrUsed = 0;
bi.biClrImportant = 0;
bi.biCompression = 0; // BI_RGB
bi.biHeight = -height;
bi.biWidth = width;
bi.biPlanes = 1;
bi.biSizeImage = imageSize;
BITMAPFILEHEADER bfh = new BITMAPFILEHEADER();
uint Fsize = (uint)Marshal.SizeOf(bfh) + (uint)Marshal.SizeOf(bi) + imageSize;
bfh.bfType = 0x4D42; // 'B' and 'M' bytes for BM type
bfh.bfSize = Fsize; // total bitmap file size
bfh.bfOffBits = Fsize - imageSize; // bitmap header offset
headerSize = bfh.bfOffBits;
//////////////////////////////////////////////////////////
// create memory buffer that will hold the complete bitmap
//////////////////////////////////////////////////////////
byte[] buffer = new byte[Fsize];
unsafe
{
fixed(byte *bPtr = buffer)
{
IntPtr bfhPtr = new IntPtr((void *)bPtr);
IntPtr bihPtr = new IntPtr((void *)(bPtr + Marshal.SizeOf(bfh)));
////////////////////////////////////////
// write bitmap header to sream
////////////////////////////////////////
Marshal.StructureToPtr(bfh, bfhPtr, true);
////////////////////////////////////////
// write bitmap info header to sream
////////////////////////////////////////
Marshal.StructureToPtr(bi, bihPtr, true);
}
}
return(buffer);
}
protected static byte[] CreateEmptyBitmap(int width, int height, ushort bpp, uint imageSize, out uint headerSize)
{
BITMAPINFO bi = new BITMAPINFO();
bi.biSize = (uint)Marshal.SizeOf(bi);
bi.biBitCount = bpp; // bit depth
bi.biClrUsed = 0;
bi.biClrImportant = 0;
bi.biCompression = 0; // BI_RGB
bi.biHeight = -height;
bi.biWidth = width;
bi.biPlanes = 1;
bi.biSizeImage = imageSize;
BITMAPFILEHEADER bfh = new BITMAPFILEHEADER();
uint Fsize = (uint)Marshal.SizeOf(bfh) + (uint)Marshal.SizeOf(bi) + imageSize;
bfh.bfType = 0x4D42; // 'B' and 'M' bytes for BM type
bfh.bfSize = Fsize; // total bitmap file size
bfh.bfOffBits = Fsize - imageSize; // bitmap header offset
headerSize = bfh.bfOffBits;
//////////////////////////////////////////////////////////
// create memory buffer that will hold the complete bitmap
//////////////////////////////////////////////////////////
byte[] buffer = new byte[Fsize];
unsafe
{
fixed (byte* bPtr = buffer)
{
IntPtr bfhPtr = new IntPtr((void*)bPtr);
IntPtr bihPtr = new IntPtr((void*)(bPtr + Marshal.SizeOf(bfh)));
////////////////////////////////////////
// write bitmap header to sream
////////////////////////////////////////
Marshal.StructureToPtr(bfh, bfhPtr, true);
////////////////////////////////////////
// write bitmap info header to sream
////////////////////////////////////////
Marshal.StructureToPtr(bi, bihPtr, true);
}
}
return buffer;
}
