//private unsafe byte getColor(int x, int y, FreeImageBitmap src, Channel channel)
//{
// int bpp = 4;
// if (src.PixelFormat == FreeImageAPI.PixelFormat.Format24bppRgb)
// {
// bpp = 3;
// }
// byte* pixel = (byte*)src.Bits.ToPointer();
// pixel += (src.Pitch * (src.Height - y - 1) + x) * bpp;
// switch (channel)
// {
// case Channel.Alpha:
// return pixel[3];
// case Channel.Red:
// return pixel[2];
// case Channel.Green:
// return pixel[1];
// case Channel.Blue:
// return pixel[0];
// }
// throw new NotSupportedException(); //Won't get here
//}
private async Task saveUncompressed(String sourceFile, String destFile, bool lossless, FREE_IMAGE_FILTER filter, ImagePageSizeStrategy pageSizeStrategy, Action <FreeImageBitmap> afterResize = null)
{
await Task.Run(() =>
{
if ((outputFormats & OutputFormats.Uncompressed) != 0)
{
Log.Info("Creating paged data for {0}", sourceFile);
using (FreeImageBitmap source = FreeImageBitmap.FromFile(sourceFile))
{
using (var stream = File.Open(String.Format(PagedTextureNameFormat, destFile), FileMode.Create, FileAccess.ReadWrite))
{
PagedImage.fromBitmap(source, 128, 1, stream, PagedImage.ImageType.WEBP, maxSize, lossless, filter, pageSizeStrategy, afterResize);
}
}
}
});
}
/// <summary>
/// Create a paged image from a FreeImageBitmap instance, note that this function is destructive
/// to the passed in FreeImageBitmap since it will resize it while creating all the mip levels
/// for the paged image. However, you will still need to dispose the image you pass in, this class
/// makes a copy while destroying the image, but does not take ownership of the original.
/// </summary>
/// <param name="image">The image to extract pages from.</param>
/// <param name="pageSize">The size of the pages to extract.</param>
public static void fromBitmap(FreeImageBitmap image, int pageSize, int padding, Stream stream, ImageType imageType, int maxSize, bool lossless, FREE_IMAGE_FILTER filter, ImagePageSizeStrategy pageSizeStrategy, Action <FreeImageBitmap> afterResize = null)
{
stream.Seek(HeaderSize, SeekOrigin.Begin); //Leave some space for the header
if (image.Width > maxSize)
{
Logging.Log.Info("Image size {0} was too large, resizing to {1}", image.Width, maxSize);
pageSizeStrategy.rescaleImage(image, new Size(maxSize, maxSize), filter);
}
PagedImage pagedImage = new PagedImage();
int padding2x = padding * 2;
FREE_IMAGE_FORMAT outputFormat;
FREE_IMAGE_SAVE_FLAGS saveFlags = FREE_IMAGE_SAVE_FLAGS.DEFAULT;
switch (imageType)
{
default:
case ImageType.PNG:
outputFormat = FREE_IMAGE_FORMAT.FIF_PNG;
break;
case ImageType.WEBP:
outputFormat = FREE_IMAGE_FORMAT.FIF_WEBP;
if (lossless)
{
saveFlags = FREE_IMAGE_SAVE_FLAGS.WEBP_LOSSLESS;
}
else
{
saveFlags = (FREE_IMAGE_SAVE_FLAGS)90;
}
break;
}
//Kind of weird, ogre and freeimage are backwards from one another in terms of scanline 0 being the top or bottom
//This easily fixes the math below by just flipping the image first. Note that pages must be flipped back over because
//of this when they are saved.
image.RotateFlip(RotateFlipType.RotateNoneFlipY);
pagedImage.numImages = 0;
pagedImage.imageType = (int)imageType;
pagedImage.imageXSize = image.Width;
pagedImage.imageYSize = image.Height;
pagedImage.pageSize = pageSize;
if (pagedImage.imageXSize != pagedImage.imageYSize)
{
throw new InvalidDataException("Image must be a square");
}
int mipLevelCount = 0;
int numPages = 0;
for (int i = pagedImage.imageXSize; i >= pageSize; i >>= 1)
{
++mipLevelCount;
int pagesForMip = i / pageSize;
numPages += pagesForMip * pagesForMip;
}
pagedImage.pages = new List <ImageInfo>(numPages);
pagedImage.mipIndices = new List <MipIndexInfo>(mipLevelCount);
IntSize2 fullPageSize = new IntSize2(pageSize + padding2x, pageSize + padding2x);
for (int mip = 0; mip < mipLevelCount; ++mip)
{
//Setup mip level
if (mip != 0)
{
pageSizeStrategy.rescaleImage(image, new Size(image.Width >> 1, image.Height >> 1), filter);
if (afterResize != null)
{
//Flip so external functions aren't confused
image.RotateFlip(RotateFlipType.RotateNoneFlipY);
afterResize(image);
//Flip back for correct math
image.RotateFlip(RotateFlipType.RotateNoneFlipY);
}
}
int size = image.Width / pageSize;
pagedImage.mipIndices.Add(new MipIndexInfo(pagedImage.numImages, size));
pageSizeStrategy.extractPage(image, padding, stream, pagedImage, pageSize, fullPageSize, size, outputFormat, saveFlags);
}
//Write half size mip
int halfPageSize = pageSize >> 1;
IntSize2 halfSizePadded = new IntSize2(halfPageSize + padding2x, halfPageSize + padding2x);
pageSizeStrategy.rescaleImage(image, new Size(image.Width >> 1, image.Height >> 1), filter);
pageSizeStrategy.extractPage(image, padding, stream, pagedImage, halfPageSize, halfSizePadded, 1, outputFormat, saveFlags);
pagedImage.indexStart = (int)stream.Position;
using (BinaryWriter sw = new BinaryWriter(stream, EncodingShim.Default, true))
{
foreach (var imageInfo in pagedImage.pages)
{
imageInfo.write(sw);
}
//Go back to header reserved space
sw.BaseStream.Seek(0, SeekOrigin.Begin);
sw.Write(MagicNumber);
sw.Write(pagedImage.numImages);
sw.Write(pagedImage.imageType);
sw.Write(pagedImage.imageXSize);
sw.Write(pagedImage.imageYSize);
sw.Write(pagedImage.pageSize);
sw.Write(pagedImage.indexStart);
}
}