public ConverterResizer(Size sourceSize, PixelAlignmentType sourceType, Size targetSize, PixelAlignmentType targetType)
{
if (SwScale.sws_isSupportedInput(m_pixelTypeMapper[m_sourceType]) == 0)
{
throw new InvalidOperationException("Unsupported source type " + sourceType);
}
if (SwScale.sws_isSupportedOutput(m_pixelTypeMapper[targetType]) == 0)
{
throw new InvalidOperationException("Unsupported target type " + targetType);
}
m_sourceSize = sourceSize;
m_targetSize = targetSize;
m_sourceType = sourceType;
m_targetType = targetType;
m_context = SwScale.sws_getContext(m_sourceSize.Width, m_sourceSize.Height, m_pixelTypeMapper[m_sourceType],
m_targetSize.Width, m_targetSize.Height, m_pixelTypeMapper[m_targetType],
SwScale.ConvertionFlags.SWS_BICUBIC, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
if (m_context == IntPtr.Zero)
{
throw new InvalidOperationException("Context initialization failed. Supplied arguments may be invalid");
}
}
public static PlanarImage FromBitmap(Bitmap source, PixelAlignmentType format, ColorSpace colorspace = ColorSpace.DEFAULT)
{
IntPtr context = SwScale.sws_getContext(source.Width, source.Height, m_rgbMapper[source.PixelFormat],
source.Width, source.Height, m_pixelTypeMapper[format],
SwScale.ConvertionFlags.SWS_BICUBIC, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
int *pCoef = SwScale.sws_getCoefficients(colorspace);
int *inv_table;
int *table;
int srcRange, dstRange, brightness, contrast, saturation;
int result = SwScale.sws_getColorspaceDetails(context, out inv_table, out srcRange, out table, out dstRange, out brightness, out contrast, out saturation);
if (result != -1)
{
result = SwScale.sws_setColorspaceDetails(context, pCoef, srcRange, table, dstRange, brightness, contrast, saturation);
}
PlanarImage yuv = new PlanarImage(source.Width, source.Height, format);
BitmapData data = source.LockBits(new Rectangle(0, 0, source.Width, source.Height), ImageLockMode.ReadOnly, source.PixelFormat);
unsafe
{
pInput[0] = (byte *)data.Scan0.ToPointer();
result = SwScale.sws_scale(context, pInput, new int[] { data.Stride, 0, 0, 0 }, 0, source.Height, yuv.PixelDataPointer, yuv.Pitches);
if (result != yuv.Height)
{
throw new InvalidOperationException();
}
}
source.UnlockBits(data);
SwScale.sws_freeContext(context);
return(yuv);
}
public PlanarImage DoTheWork(PlanarImage source)
{
PlanarImage target = new PlanarImage(m_targetSize.Width, m_targetSize.Height, m_targetType);
int result = SwScale.sws_scale(m_context, source.PixelDataPointer, source.Pitches, 0, source.Height, target.PixelDataPointer, target.Pitches);
if (result != target.Height)
{
throw new InvalidOperationException();
}
return(target);
}
public static void Apply(PlanarImage source, PlanarImage target)
{
IntPtr context = SwScale.sws_getContext(source.Width, source.Height, m_pixelTypeMapper[source.PixelType],
target.Width, target.Height, m_pixelTypeMapper[target.PixelType],
SwScale.ConvertionFlags.SWS_BICUBIC, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
int result = SwScale.sws_scale(context, source.PixelDataPointer, source.Pitches, 0, source.Height, target.PixelDataPointer, target.Pitches);
if (result != target.Height)
{
throw new InvalidOperationException();
}
SwScale.sws_freeContext(context);
}
public static Bitmap ToBitmap(PlanarImage source, PixelFormat format, ColorSpace colorspace = ColorSpace.DEFAULT)
{
IntPtr context = SwScale.sws_getContext(source.Width, source.Height, m_pixelTypeMapper[source.PixelType],
source.Width, source.Height, m_rgbMapper[format],
SwScale.ConvertionFlags.SWS_BICUBIC, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
int *pCoef = SwScale.sws_getCoefficients(colorspace);
int *inv_table;
int *table;
int srcRange, dstRange, brightness, contrast, saturation;
int result = SwScale.sws_getColorspaceDetails(context, out inv_table, out srcRange, out table, out dstRange, out brightness, out contrast, out saturation);
if (result != -1)
{
result = SwScale.sws_setColorspaceDetails(context, pCoef, srcRange, pCoef, dstRange, brightness, contrast, saturation);
}
Bitmap bmp = new Bitmap(source.Width, source.Height, format);
BitmapData data = bmp.LockBits(new Rectangle(0, 0, source.Width, source.Height), ImageLockMode.ReadWrite, format);
unsafe
{
pInput[0] = (byte *)data.Scan0.ToPointer();
result = SwScale.sws_scale(context, source.PixelDataPointer, source.Pitches, 0, source.Height, pInput, new int[] { data.Stride, 0, 0, 0 });
if (result != source.Height)
{
throw new InvalidOperationException();
}
}
bmp.UnlockBits(data);
if (bmp.Palette != null && bmp.Palette.Entries != null && bmp.Palette.Entries.Length > 0)
{
ColorPalette cp = bmp.Palette;
for (int i = 0; i < cp.Entries.Length; i++)
{
cp.Entries[i] = Color.FromArgb(i, i, i);
}
bmp.Palette = cp;
}
SwScale.sws_freeContext(context);
return(bmp);
}
public void Dispose()
{
SwScale.sws_freeContext(m_context);
Marshal.FreeHGlobal(new IntPtr(pInput));
}
