public BitmapSource GetImage(string imageLibraryPath, int imageIndex)
{
ImageLibrary ilb = GetImageLibrary(imageLibraryPath);
AowImage imageData = ilb[imageIndex];
return(ImageLoader.LoadBitmap(imageData, ilb));
}
public BitmapSource GetCroppedImage(string imageLibraryPath, int imageIndex)
{
AowImage imageData = GetImageData(imageLibraryPath, imageIndex);
if (imageData == null)
{
return(null);
}
BitmapSource image = GetImage(imageLibraryPath, imageIndex);
return(Crop(image, imageData));
}
private static BitmapSource ConvertToAlpha(BitmapSource image, AowImage imageData)
{
unsafe
{
int sourceStride = BitmapHelper.Stride(image.PixelWidth, image.Format);
// array has twice more rows than needed, but otherwise CopyPixels fails for some reason
ushort[,] sourceDataRaw = new ushort[image.PixelHeight * sizeof(ushort), sourceStride / sizeof(ushort)];
fixed(ushort *dataPtr = &sourceDataRaw[0, 0])
{
image.CopyPixels(Int32Rect.Empty, new IntPtr(dataPtr), sourceDataRaw.Length, sourceStride);
}
ushort alphaCode = (ushort)(imageData as KeyColorImage <int>).KeyColorIndex;
List <IntPoint> alphaIndexes = new List <IntPoint>();
for (int i = 0; i < sourceDataRaw.GetLength(0); i++)
{
for (int j = 0; j < sourceDataRaw.GetLength(1); j++)
{
if (sourceDataRaw[i, j] == alphaCode)
{
alphaIndexes.Add(new IntPoint {
X = i, Y = j
});
}
}
}
ColorContext sourceContext = new ColorContext(image.Format);
ColorContext targetContext = new ColorContext(PixelFormats.Bgra32);
ColorConvertedBitmap converted = new ColorConvertedBitmap(image, sourceContext, targetContext, PixelFormats.Bgra32);
int targetStride = BitmapHelper.Stride(converted.PixelWidth, converted.Format);
WriteableBitmap writeable = new WriteableBitmap(converted);
writeable.Lock();
IntPtr backBufferPtr = writeable.BackBuffer;
foreach (IntPoint p in alphaIndexes)
{
IntPtr pixelPtr = backBufferPtr + targetStride * p.X + 4 * p.Y;
*((int *)pixelPtr) = 0;
}
writeable.AddDirtyRect(new Int32Rect(0, 0, writeable.PixelWidth, writeable.PixelHeight));
writeable.Unlock();
return(writeable);
}
}
private BitmapSource Crop(BitmapSource image, AowImage imageData)
{
OffsetImage offsetData = imageData as OffsetImage;
if (offsetData != null)
{
Int32Rect rect = new Int32Rect(offsetData.DataOffsetX, offsetData.DataOffsetY, offsetData.DataWidth, offsetData.DataHeight);
image = new CroppedBitmap(image, rect);
}
if (image.Format == PixelFormats.Bgr565 || image.Format == PixelFormats.Bgr555)
{
image = ConvertToAlpha(image, imageData);
}
return(image);
}
public BitmapSource ReadData(AowImage image, Stream stream, int length, BitmapPalette palette, PixelFormat?pixelFormat) => ReadData(image as T, stream, length, palette, pixelFormat);
public static IImageDataReader ReaderFor(AowImage image) => ReaderFor(image.GetType());
