public int sceZlibDecompress(byte *OutBuffer, int OutBufferLength, byte *InBuffer, uint *Crc32Addr)
{
var InStream = new PointerStream(InBuffer);
var OutStream = new PointerStream(OutBuffer, OutBufferLength);
_Decompress(InStream, OutStream);
var OutLength = (int)OutStream.Position;
if (Crc32Addr != null)
{
*Crc32Addr = Crc32.Compute(PointerUtils.PointerToByteArray(OutBuffer, OutLength));
}
return(OutLength);
}
public unsafe static BitmapSource Read(ref BITMAP_READ_DETAILS info, byte *pixels, uint bcrFlags)
{
// we do this parsing here since BitmapCore has no references to PresentationCore
if (info.compression == BitmapCompressionMode.BI_PNG)
{
var stream = new PointerStream(pixels, info.imgDataSize);
var png = new PngBitmapDecoder(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
return(png.Frames[0]);
}
else if (info.compression == BitmapCompressionMode.BI_JPEG)
{
var stream = new PointerStream(pixels, info.imgDataSize);
var jpg = new JpegBitmapDecoder(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
return(jpg.Frames[0]);
}
PixelFormat wpfFmt = PixelFormats.Bgra32;
BitmapCorePixelFormat coreFmt = BitmapCorePixelFormat.Bgra32;
bool forceBgra32 = (bcrFlags & BitmapCore.BC_READ_FORCE_BGRA32) > 0;
if (!forceBgra32 && info.imgSourceFmt != null)
{
var origFmt = info.imgSourceFmt;
var pxarr = Formats.Where(m => m.coreFmt == origFmt).ToArray();
if (pxarr.Length > 0)
{
var px = pxarr.First();
wpfFmt = px.wpfFmt;
coreFmt = px.coreFmt;
}
}
BitmapPalette palette = null;
if (info.imgColorTable.Length > 0)
{
var clrs = info.imgColorTable.Select(c => Color.FromRgb(c.rgbRed, c.rgbGreen, c.rgbBlue));
if (info.imgColorTable.Length > 256) // wpf throws on oversized palettes
{
clrs = clrs.Take(256);
}
palette = new BitmapPalette(clrs.ToList());
}
var bitmap = new WriteableBitmap(
info.imgWidth,
info.imgHeight,
info.dpiX,
info.dpiY,
wpfFmt,
palette);
var buf = (byte *)bitmap.BackBuffer;
bitmap.Lock();
BitmapCore.ReadPixels(ref info, coreFmt, pixels, buf, bcrFlags);
bitmap.AddDirtyRect(new System.Windows.Int32Rect(0, 0, info.imgWidth, info.imgHeight));
bitmap.Unlock();
bitmap.Freeze(); // dispose back buffer
return(bitmap);
}
