public ImageData ReadBmp(IBinaryStream file, BmpMetaData info, byte[] alpha, int alp_stride)
{
var decoder = new BmpBitmapDecoder(file.AsStream,
BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
BitmapSource bitmap = decoder.Frames[0];
bitmap = new FormatConvertedBitmap(bitmap, PixelFormats.Bgr32, null, 0);
int dst_stride = (int)info.Width * 4;
var pixels = new byte[(int)info.Height * dst_stride];
bitmap.CopyPixels(pixels, dst_stride, 0);
int dst = 0;
int src = 0;
for (int y = (int)info.Height; y > 0; --y)
{
int a_src = src;
for (int x = 3; x < dst_stride; x += 4)
{
pixels[dst + x] = alpha[a_src++];
}
dst += dst_stride;
src += alp_stride;
}
return(ImageData.Create(info, PixelFormats.Bgra32, null, pixels, dst_stride));
}
public void CloneIsDeep()
{
var meta = new BmpMetaData()
{
BitsPerPixel = BmpBitsPerPixel.Pixel24
};
var clone = (BmpMetaData)meta.DeepClone();
clone.BitsPerPixel = BmpBitsPerPixel.Pixel32;
Assert.False(meta.BitsPerPixel.Equals(clone.BitsPerPixel));
}
public ImageData Read(IBinaryStream file, BmpMetaData info)
{
if (info.BPP != 24 && info.BPP != 32 || !file.CanSeek)
{
return(null);
}
var alp_name = Path.ChangeExtension(info.FileName, "alp");
if (alp_name.Equals(info.FileName, StringComparison.InvariantCultureIgnoreCase) ||
!VFS.FileExists(alp_name))
{
return(null);
}
var alpha_size = info.Width * info.Height;
var alpha = new byte[alpha_size];
using (var alp = VFS.OpenStream(alp_name))
{
if (alpha.Length != alp.Read(alpha, 0, alpha.Length) || alp.ReadByte() != -1)
{
return(null);
}
}
file.Position = info.HeaderLength;
int dst_stride = (int)info.Width * 4;
int gap = -((int)info.Width * info.BPP / 8) & 3;
var pixels = new byte[(int)info.Height * dst_stride];
int src_pixel_size = info.BPP / 8;
int dst = (int)(info.Height - 1) * dst_stride;
for (int y = (int)info.Height - 1; y >= 0; --y)
{
int a_src = (int)info.Width * y;
for (int x = 0; x < dst_stride; x += 4)
{
file.Read(pixels, dst + x, src_pixel_size);
pixels[dst + x + 3] = alpha[a_src++];
}
if (gap != 0)
{
file.Seek(gap, SeekOrigin.Current);
}
dst -= dst_stride;
}
return(ImageData.Create(info, PixelFormats.Bgra32, null, pixels, dst_stride));
}
public ImageData Read(IBinaryStream file, BmpMetaData info)
{
if (info.BPP != 0x10 || !file.CanSeek)
{
return(null);
}
int stride = ((int)info.Width * 3 + 3) & ~3;
int total_24bpp = stride * (int)info.Height;
if (total_24bpp + info.ImageOffset != file.Length)
{
return(null);
}
file.Position = info.ImageOffset;
var pixels = file.ReadBytes((int)total_24bpp);
return(ImageData.CreateFlipped(info, PixelFormats.Bgr24, null, pixels, stride));
}
public override void WriteImage(Image image)
{
BinaryWriter writer = new BinaryWriter(new FileStream(OutputPath + ".bmp", FileMode.Create));
BmpMetaData metaData = new BmpMetaData(image);
writer.Write(BmpMetaData.bitmapSignatureBytes);
writer.Write(metaData.sizeOfBitmapFile);
writer.Write(BmpMetaData.reservedBytes);
writer.Write(BmpMetaData.pixelDataOffset);
writer.Write(BmpMetaData.sizeOfThisHeader);
writer.Write(metaData.height);
writer.Write(metaData.width);
writer.Write(BmpMetaData.numberOfColorPlanes);
writer.Write(BmpMetaData.colorDepth);
writer.Write(BmpMetaData.compressionMethod);
writer.Write(BmpMetaData.rawBitmapDataSize);
writer.Write(BmpMetaData.horizontalResolution);
writer.Write(BmpMetaData.verticalResolution);
writer.Write(BmpMetaData.colorTableEntries);
writer.Write(BmpMetaData.importantColors);
for (int i = 0; i < image.Height; i++)
{
var rowOfPixels = image.ImagePalette.ListOfPixels.GetRange(i * image.Width, image.Width);
foreach (var pixel in rowOfPixels)
{
writer.Write(pixel.Color.B);
writer.Write(pixel.Color.G);
writer.Write(pixel.Color.R);
}
}
writer.Write(new byte[] { 0, 0 });
writer.Flush();
writer.Close();
}
/// <summary>
/// Initializes a new instance of the <see cref="BmpMetaData"/> class.
/// </summary>
/// <param name="other">The metadata to create an instance from.</param>
private BmpMetaData(BmpMetaData other)
{
this.BitsPerPixel = other.BitsPerPixel;
this.InfoHeaderType = other.InfoHeaderType;
}
/// <summary> /// Initializes a new instance of the <see cref="BmpMetaData"/> class. /// </summary> /// <param name="other">The metadata to create an instance from.</param> private BmpMetaData(BmpMetaData other) => this.BitsPerPixel = other.BitsPerPixel;