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using System;
namespace FSpot.Imaging {
public enum PixelBufferDepth {
UInt8 = 8,
UInt16 = 16
}
public class UInt16Buffer : PixelBuffer {
protected ushort [] data;
public UInt16Buffer (int width, int height)
{
this.width = width;
this.height = height;
this.nchannels = 3;
depth = PixelBufferDepth.UInt16;
rowstride = width * nchannels;
data = new ushort [width * height * nchannels];
}
public UInt16Buffer (Gdk.Pixbuf pixbuf, Cms.Profile profile)
{
this.profile = profile;
width = pixbuf.Width;
height = pixbuf.Height;
this.nchannels = pixbuf.HasAlpha ? 4 : 3;
depth = PixelBufferDepth.UInt16;
data = new ushort [width * height * nchannels];
unsafe {
byte * src_pixels = (byte *) pixbuf.Pixels;
int src_stride = pixbuf.Rowstride;
int count = pixbuf.Width * nchannels;
for (int row = 0; row < height; row++) {
Fill8 (row, 0, src_pixels, row * src_stride, count);
}
}
}
public Cms.Format Format {
get {
return nchannels > 3 ? Cms.Format.Rgba16 : Cms.Format.Rgb16;
}
}
public unsafe void Fill8 (int i, int j, byte * src_data, int offset, int count)
{
ushort * rowpix;
fixed (ushort * pixels = &data [0]) {
rowpix = pixels + i * rowstride + j;
for (int col = 0; col < count; col++) {
int val = src_data [col];
rowpix [col] = (ushort) (val << 8 & val);
}
}
}
public override void Fill8 (int row, int col, byte [] value, int start_offset, int len)
{
unsafe {
fixed (byte * src_data = &value[0]) {
Fill8 (row, col, src_data, start_offset, len);
}
}
}
public override void Fill16 (int i, int j, byte [] src_data, int offset, int count, bool little)
{
if (System.BitConverter.IsLittleEndian == little)
Fill16 (i, j, src_data, offset, count);
else
Fill16Swap (i, j, src_data, offset, count);
}
public void Fill16 (int i, int j, byte [] src_data, int offset, int count)
{
unsafe {
ushort * rowpix;
fixed (ushort * pixels = &data [0]) {
fixed (byte * bytes = &src_data [offset]) {
ushort * src_pixels= (ushort *) bytes;
rowpix = pixels + i * rowstride + j;
for (int col = 0; col < count; col ++)
rowpix [col] = src_pixels [col];
}
}
}
}
public void Fill16Swap (int i, int j, byte [] src_data, int offset, int count)
{
unsafe {
ushort * rowpix;
fixed (ushort * pixels = &data [0]) {
fixed (byte * bytes = &src_data [offset]) {
ushort * src_pixels = (ushort *) bytes;
rowpix = pixels + i * rowstride + j;
for (int col = 0; col < count; col ++)
rowpix [col] = BitConverter.Swap (src_pixels [col]);
}
}
}
}
public override Gdk.Pixbuf ToPixbuf (Cms.Profile destination_profile)
{
#if true //USE_LCMS
profile = Cms.Profile.CreateStandardRgb ();
Cms.Profile [] list = new Cms.Profile [] { profile, destination_profile };
Gdk.Pixbuf pixbuf = new Gdk.Pixbuf (Gdk.Colorspace.Rgb, false, 8,
width, height);
Cms.Transform t = new Cms.Transform (list,
Cms.Format.Rgb16,
PixbufUtils.PixbufCmsFormat (pixbuf),
Cms.Intent.Perceptual, 0x0);
unsafe {
fixed (ushort * srcpix = &data[0]) {
byte * destpix = (byte *) pixbuf.Pixels;
for (int row = 0; row < height; row++)
t.Apply ((IntPtr) (srcpix + row * rowstride),
(IntPtr) (destpix + row * pixbuf.Rowstride),
(uint)width);
}
}
return pixbuf;
#else
Gdk.Pixbuf pixbuf = new Gdk.Pixbuf (Gdk.Colorspace.Rgb, false, 8,
width, height);
unsafe {
fixed (ushort * src = &data[0]) {
ushort * srcpix = src;
byte * destpix = (byte *) pixbuf.Pixels;
for (int row = 0; row < height; row++) {
for (int col = 0; col < width * nchannels; col++)
destpix [col] = (byte) (srcpix [col] >> 8);
srcpix += rowstride;
destpix += pixbuf.Rowstride;
}
}
}
return pixbuf;
#endif
}
}
#if false
public class UInt8Buffer : PixelBuffer {
protected ushort [] data;
}
public class PixbufBuffer : PixelBuffer {
protected Gdk.Pixbuf pixbuf;
public PixbufBuffer (Gdk.Pixbuf pixbuf)
{
}
}
#endif
public abstract class PixelBuffer {
protected int rowstride;
protected int width;
protected int height;
protected int nchannels;
protected PixelBufferDepth depth;
protected Cms.Profile profile;
protected PixelBuffer ()
{
}
public int Width {
get {
return width;
}
}
public int Height {
get {
return height;
}
}
public abstract void Fill8 (int row, int col, byte [] value, int start_offset, int len);
public abstract void Fill16 (int row, int col, byte [] data, int offset, int len, bool little);
public abstract Gdk.Pixbuf ToPixbuf (Cms.Profile profile);
}
}
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