/// <summary>Initializes a new instance of the <see cref="BITMAPINFOHEADER"/> structure.</summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="bitCount">The bit count.</param>
public BITMAPINFOHEADER(int width, int height, ushort bitCount = 32)
: this()
{
biSize = Marshal.SizeOf(typeof(BITMAPINFO));
biWidth = width;
biHeight = height;
biPlanes = 1;
biBitCount = bitCount;
biCompression = BitmapCompressionMode.BI_RGB;
biSizeImage = 0; // (uint)width * (uint)height * bitCount / 8;
}
public BITMAPINFOHEADER(int width, int height, ushort bitCount)
{
biSize = (uint)Marshal.SizeOf(typeof(BITMAPINFOHEADER));
biWidth = width;
biHeight = height;
biPlanes = 1;
biBitCount = bitCount;
biCompression = BitmapCompressionMode.BI_RGB;
biSizeImage = 0;
biXPelsPerMeter = 0;
biYPelsPerMeter = 0;
biClrUsed = 0;
biClrImportant = 0;
}
public BITMAPINFOHEADER(int width, int height, uint sizeImg = 0, uint bSize = 40, uint clrUsed = 256,
uint clrImportant = 0, BitmapCompressionMode mode = BitmapCompressionMode.BI_RGB, ushort bpp = 8, ushort planes = 1)
{
biSize = bSize;
biWidth = width;
biHeight = height;
biPlanes = planes;
biBitCount = bpp;
biCompression = mode;
biSizeImage = sizeImg;
biXPelsPerMeter = 0;
biYPelsPerMeter = 0;
biClrUsed = clrUsed;
biClrImportant = clrImportant;
}
public static byte[] WriteToBMP(ref BITMAP_WRITE_REQUEST info, byte *sourceBufferStart, BITMASKS masks, ushort nbits, uint bcwFlags)
{
bool skipFileHeader = (bcwFlags & BC_WRITE_SKIP_FH) > 0;
bool forceV5 = (bcwFlags & BC_WRITE_V5) > 0;
bool forceInfo = (bcwFlags & BC_WRITE_VINFO) > 0;
if (forceV5 && forceInfo)
{
throw new ArgumentException("ForceV5 and ForceInfo flags can not be used at the same time.");
}
// NOT SUPPORTED RIGHT NOW
bool iccEmbed = false;
byte[] iccProfileData = new byte[0];
var hasAlpha = masks.maskAlpha != 0;
if (nbits < 16 && (info.imgColorTable == null || info.imgColorTable.Length == 0))
{
throw new InvalidOperationException("A indexed bitmap must have a color table / palette.");
}
//int dpiToPelsPM(double dpi)
//{
// if (Math.Round(dpi) == 96d) return 0;
// return (int)Math.Round(dpi / 0.0254d);
//}
uint paletteSize = info.imgColorTable == null ? 0 : (uint)info.imgColorTable.Length;
var fhSize = (uint)Marshal.SizeOf <BITMAPFILEHEADER>();
var quadSize = (uint)Marshal.SizeOf <RGBQUAD>();
byte[] buffer;
uint pxOffset, pxSize;
// BI_BITFIELDS is not valid for 24bpp, so if the masks are not RGB we need to use a V5 header.
//var nonStandard24bpp = nbits == 24 && !BitmapCorePixelFormat2.Bgr24.IsMatch(24, masks);
BitmapCompressionMode compr = BitmapCompressionMode.BI_RGB;
// some parsers do not respect the v5 header masks unless BI_BITFIELDS is used...
// this is true of Chrome (only for 16bpp) and is also true of FireFox (16 and 32bpp)
if (nbits == 16 || nbits == 32)
{
compr = BitmapCompressionMode.BI_BITFIELDS;
}
// write V5 header if embedded color profile or has alpha data
if (forceV5 || hasAlpha || iccEmbed)
{
var v5Size = (uint)Marshal.SizeOf <BITMAPV5HEADER>();
// Typical structure:
// - BITMAPFILEHEADER (Optional)
// - BITMAPV5HEADER
// - * Note, never write BI_BITFIELDS at the end of a V5 header, these masks are contained within the header itself
// - Color Table (Optional)
// - Pixel Data
// - Embedded Color Profile (Optional)
var fh = new BITMAPFILEHEADER
{
bfType = BFH_BM,
};
var v5 = new BITMAPV5HEADER
{
bV5Size = v5Size,
bV5Planes = 1,
bV5BitCount = nbits,
bV5Height = info.imgTopDown ? -info.imgHeight : info.imgHeight,
bV5Width = info.imgWidth,
bV5Compression = compr,
bV5XPelsPerMeter = 0,
bV5YPelsPerMeter = 0,
bV5RedMask = masks.maskRed,
bV5GreenMask = masks.maskGreen,
bV5BlueMask = masks.maskBlue,
bV5AlphaMask = masks.maskAlpha,
bV5ClrImportant = paletteSize,
bV5ClrUsed = paletteSize,
bV5SizeImage = (uint)(info.imgStride * info.imgHeight),
bV5CSType = ColorSpaceType.LCS_sRGB,
bV5Intent = Bv5Intent.LCS_GM_IMAGES,
};
uint offset = skipFileHeader ? 0 : fhSize;
offset += v5Size;
offset += paletteSize * quadSize;
// fh offset points to beginning of pixel data
fh.bfOffBits = pxOffset = offset;
pxSize = v5.bV5SizeImage;
offset += v5.bV5SizeImage;
if (iccEmbed)
{
v5.bV5CSType = ColorSpaceType.PROFILE_EMBEDDED;
v5.bV5ProfileData = offset;
v5.bV5ProfileSize = (uint)iccProfileData.Length;
offset += v5.bV5ProfileSize;
}
// fh size must be total file size
fh.bfSize = offset;
buffer = new byte[offset];
offset = 0;
if (!skipFileHeader)
{
StructUtil.SerializeTo(fh, buffer, ref offset);
}
StructUtil.SerializeTo(v5, buffer, ref offset);
if (info.imgColorTable != null)
{
foreach (var p in info.imgColorTable)
{
StructUtil.SerializeTo(p, buffer, ref offset);
}
}
Marshal.Copy((IntPtr)sourceBufferStart, buffer, (int)offset, (int)v5.bV5SizeImage);
offset += v5.bV5SizeImage;
if (iccEmbed)
{
Buffer.BlockCopy(iccProfileData, 0, buffer, (int)offset, iccProfileData.Length);
}
}
else
{
var infoSize = (uint)Marshal.SizeOf <BITMAPINFOHEADER>();
// Typical structure:
// - BITMAPFILEHEADER (Optional)
// - BITMAPINFOHEADER
// - BI_BITFIELDS (Optional)
// - Color Table (Optional)
// - Pixel Data
// this would be ideal, we can specify transparency in VINFO headers... but many applications incl FireFox do not support this.
// if (hasAlpha) compr = BitmapCompressionMode.BI_ALPHABITFIELDS;
var fh = new BITMAPFILEHEADER
{
bfType = BFH_BM,
};
var vinfo = new BITMAPINFOHEADER
{
bV5Size = infoSize,
bV5Planes = 1,
bV5BitCount = nbits,
bV5Height = info.imgTopDown ? -info.imgHeight : info.imgHeight,
bV5Width = info.imgWidth,
bV5Compression = compr,
bV5XPelsPerMeter = 0,
bV5YPelsPerMeter = 0,
bV5ClrImportant = paletteSize,
bV5ClrUsed = paletteSize,
bV5SizeImage = (uint)(info.imgStride * info.imgHeight),
};
uint offset = skipFileHeader ? 0 : fhSize;
offset += infoSize;
if (compr == BitmapCompressionMode.BI_BITFIELDS)
{
offset += sizeof(uint) * 3;
}
offset += paletteSize * quadSize;
// fh offset points to beginning of pixel data
fh.bfOffBits = pxOffset = offset;
pxSize = vinfo.bV5SizeImage;
offset += vinfo.bV5SizeImage;
// fh size must be total file size
fh.bfSize = offset;
buffer = new byte[offset];
offset = 0;
if (!skipFileHeader)
{
StructUtil.SerializeTo(fh, buffer, ref offset);
}
StructUtil.SerializeTo(vinfo, buffer, ref offset);
if (compr == BitmapCompressionMode.BI_BITFIELDS)
{
Buffer.BlockCopy(masks.BITFIELDS(), 0, buffer, (int)offset, sizeof(uint) * 3);
offset += sizeof(uint) * 3;
}
if (info.imgColorTable != null)
{
foreach (var p in info.imgColorTable)
{
StructUtil.SerializeTo(p, buffer, ref offset);
}
}
Marshal.Copy((IntPtr)sourceBufferStart, buffer, (int)offset, (int)vinfo.bV5SizeImage);
}
return(buffer);
}
public BITMAPINFOHEADER(int width, int height, ushort bitCount)
{
biSize = (uint)Marshal.SizeOf(typeof(BITMAPINFOHEADER));
biWidth = width;
biHeight = height;
biPlanes = 1;
biBitCount = bitCount;
biCompression = BitmapCompressionMode.BI_RGB;
biSizeImage = 0;
biXPelsPerMeter = 0;
biYPelsPerMeter = 0;
biClrUsed = 0;
biClrImportant = 0;
}
