/// <param name="cacheColors">
/// Set this based on which types of methods will be used
/// True: Cache colors
/// False: Cache bytes
/// </param>
public BitmapCustomCachedColors(BitmapStreamInfo info, bool cacheColors)
{
_width = info.Width;
_height = info.Height;
_outOfBoundsColor = info.OutOfBoundsColor;
_outOfBoundsBytes = info.OutOfBoundsBytes;
if (cacheColors)
{
_colors = new BitmapCustomCachedBytes(info).GetColors();
_bytes = null;
}
else
{
_bytes = new BitmapCustomCachedBytes(info).GetColors_Byte();
_colors = null;
}
}
public BitmapCustomCachedBytes(BitmapStreamInfo info)
{
_info = info;
}
/// <param name="convertToColors">
/// True: The entire byte array will be converted into Color structs up front (or byte[][])
/// Use this if you want color structs (expensive, but useful)
/// This takes an up front cache hit, but repeated requests for colors are cheap
/// Only useful if you plan to do many gets from this class
///
/// False: The byte array is stored in the file's format, and any requests for colors are done on the fly
/// This is more useful if you plan to get the colors in other formats (byte[][] or convolution), or if you just want an array of color[]
/// Also good if only a subset of the pixels will be looked at
/// Another use for this is if you want another thread to take the hit
/// </param>
/// <param name="outOfBoundsColor">If requests for pixels outside of width/height are made, this is the color that should be returned (probably either use transparent or black)</param>
/// <param name="convertToColors_IsColor">
/// True: cached as colors
/// False: cached as bytes -- there may be a case where this is more efficient than using BitmapCustomCachedBytes???
/// </param>
public static IBitmapCustom ConvertToColorArray(BitmapSource bitmap, bool convertToColors, Color outOfBoundsColor, bool convertToColors_IsColor = true)
{
if (bitmap.Format != PixelFormats.Pbgra32 && bitmap.Format != PixelFormats.Bgr32)
{
// I've only coded against the above two formats, so put it in that
bitmap = new FormatConvertedBitmap(bitmap, PixelFormats.Pbgra32, null, 0); //http://stackoverflow.com/questions/1176910/finding-specific-pixel-colors-of-a-bitmapimage
}
// Get a byte array
int stride = (bitmap.PixelWidth * bitmap.Format.BitsPerPixel + 7) / 8; //http://msdn.microsoft.com/en-us/magazine/cc534995.aspx
byte[] bytes = new byte[stride * bitmap.PixelHeight];
bitmap.CopyPixels(bytes, stride, 0);
BitmapStreamInfo info = new BitmapStreamInfo(bytes, bitmap.PixelWidth, bitmap.PixelHeight, stride, bitmap.Format, outOfBoundsColor);
// Exit Function
if (convertToColors)
{
return new BitmapCustomCachedColors(info, convertToColors_IsColor);
}
else
{
return new BitmapCustomCachedBytes(info);
}
}
