/// <summary>
/// Get an tile-organized image that has
/// PlanarConfiguration contiguous if SamplesPerPixel > 1
/// or
/// SamplesPerPixel == 1
/// </summary>
private static bool gtTileContig(TiffRgbaImage img, int[] raster, int offset, int width, int height)
{
byte[] buf = new byte[img.tif.TileSize()];
FieldValue[] result = img.tif.GetField(TiffTag.TILEWIDTH);
int tileWidth = result[0].ToInt();
result = img.tif.GetField(TiffTag.TILELENGTH);
int tileHeight = result[0].ToInt();
int flip = img.setorientation();
int y;
int rasterShift;
if ((flip & FLIP_VERTICALLY) != 0)
{
y = height - 1;
rasterShift = -(tileWidth + width);
}
else
{
y = 0;
rasterShift = -(tileWidth - width);
}
bool ret = true;
for (int row = 0; row < height; )
{
int rowstoread = tileHeight - (row + img.row_offset) % tileHeight;
int nrow = (row + rowstoread > height ? height - row : rowstoread);
for (int col = 0; col < width; col += tileWidth)
{
if (img.tif.ReadTile(buf, 0, col + img.col_offset, row + img.row_offset, 0, 0) < 0 && img.stoponerr)
{
ret = false;
break;
}
int pos = ((row + img.row_offset) % tileHeight) * img.tif.TileRowSize();
if (col + tileWidth > width)
{
// Tile is clipped horizontally. Calculate visible portion and
// skewing factors.
int npix = width - col;
int bufferShift = tileWidth - npix;
img.putContig(img, raster, offset + y * width + col, rasterShift + bufferShift,
col, y, npix, nrow, buf, pos, bufferShift);
}
else
{
img.putContig(img, raster, offset + y * width + col, rasterShift,
col, y, tileWidth, nrow, buf, pos, 0);
}
}
y += ((flip & FLIP_VERTICALLY) != 0 ? -nrow : nrow);
row += nrow;
}
if ((flip & FLIP_HORIZONTALLY) != 0)
{
for (int line = 0; line < height; line++)
{
int left = offset + line * width;
int right = left + width - 1;
while (left < right)
{
int temp = raster[left];
raster[left] = raster[right];
raster[right] = temp;
left++;
right--;
}
}
}
return ret;
}
/// <summary>
/// Get a strip-organized image that has
/// PlanarConfiguration contiguous if SamplesPerPixel > 1
/// or
/// SamplesPerPixel == 1
/// </summary>
private static bool gtStripContig(TiffRgbaImage img, int[] raster, int offset, int width, int height)
{
byte[] buf = new byte[img.tif.StripSize()];
int flip = img.setorientation();
int y;
int rasterShift;
if ((flip & FLIP_VERTICALLY) != 0)
{
y = height - 1;
rasterShift = -(width + width);
}
else
{
y = 0;
rasterShift = -(width - width);
}
FieldValue[] result = img.tif.GetFieldDefaulted(TiffTag.ROWSPERSTRIP);
int rowsperstrip = result[0].ToInt();
if (rowsperstrip == -1)
{
// San Chen <*****@*****.**>
// HACK: should be UInt32.MaxValue
rowsperstrip = Int32.MaxValue;
}
result = img.tif.GetFieldDefaulted(TiffTag.YCBCRSUBSAMPLING);
short subsamplingver = result[1].ToShort();
int scanline = img.tif.newScanlineSize();
int bufferShift = (width < img.width ? img.width - width : 0);
bool ret = true;
for (int row = 0; row < height; )
{
int rowstoread = rowsperstrip - (row + img.row_offset) % rowsperstrip;
int nrow = (row + rowstoread > height ? height - row : rowstoread);
int nrowsub = nrow;
if ((nrowsub % subsamplingver) != 0)
nrowsub += subsamplingver - nrowsub % subsamplingver;
if (img.tif.ReadEncodedStrip(img.tif.ComputeStrip(row + img.row_offset, 0), buf, 0, ((row + img.row_offset) % rowsperstrip + nrowsub) * scanline) < 0 && img.stoponerr)
{
ret = false;
break;
}
int pos = ((row + img.row_offset) % rowsperstrip) * scanline;
img.putContig(img, raster, offset + y * width, rasterShift, 0, y, width, nrow, buf, pos, bufferShift);
y += (flip & FLIP_VERTICALLY) != 0 ? -nrow : nrow;
row += nrow;
}
if ((flip & FLIP_HORIZONTALLY) != 0)
{
for (int line = 0; line < height; line++)
{
int left = offset + line * width;
int right = left + width - 1;
while (left < right)
{
int temp = raster[left];
raster[left] = raster[right];
raster[right] = temp;
left++;
right--;
}
}
}
return ret;
}