/// <summary>
/// Corrects the gamma.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="libraryData">The library data.</param>
/// <param name="request">The request.</param>
public void CorrectGamma(TexImage image, FreeImageTextureLibraryData libraryData, GammaCorrectionRequest request)
{
Log.Info("Applying a gamma correction of " + request.Gamma + " ...");
foreach (FIBITMAP bitmap in libraryData.Bitmaps)
{
FreeImage.AdjustGamma(bitmap, request.Gamma);
}
}
public void ConvertBitmap(ImageType newImageType)
{
if (ImageType == newImageType)
{
return;
}
int newbpp, oldbpp;
FREE_IMAGE_TYPE newType = ImageTypeToFreeImageType(newImageType, out newbpp);
FREE_IMAGE_TYPE oldType = ImageTypeToFreeImageType(ImageType, out oldbpp);
if (newType != oldType || newbpp != oldbpp)
{
FIBITMAP newBitmap = FreeImage.ConvertToType(_bitmap, newType, false);
FreeImage.UnloadEx(ref _bitmap);
_bitmap = newBitmap;
}
// check if a change in color space is needed.
if (IsGammaCorrected(ImageType) != IsGammaCorrected(newImageType))
{
double gamma;
if (IsGammaCorrected(ImageType)) // from linear color space to non linear
{
gamma = 1d / 2.2d;
}
else
{
gamma = 2.2d;
}
if (!FreeImage.AdjustGamma(_bitmap, gamma))
{
throw new ContentLoadException("FreeImage was unable to adjust the bitmap's gamma");
}
}
ImageType = newImageType;
}
public void Example()
{
if (!File.Exists(fileName))
{
Console.WriteLine("File not found. Aborting.");
return;
}
// Load the multipaged bitmap.
// 'OpenMultiBitmapEx' tries to find the correct file format, loads the bitmap
// with default options, with write support and does not use caching.
dib = FreeImage.OpenMultiBitmapEx(fileName);
// Check whether loading succeeded.
if (dib.IsNull)
{
Console.WriteLine("File could not be loaded. Aborting.");
return;
}
// Get the number of bitmaps the multipaged bitmap contains.
int count = FreeImage.GetPageCount(dib);
// Multipaged bitmaps consist of multiple single FIBITMAPs
FIBITMAP page = new FIBITMAP();
// There are bitmaps we can work with.
if (count > 0)
{
// Lock a random bitmap to work with.
page = FreeImage.LockPage(dib, rand.Next(0, count));
}
// Check whether locking succeeded.
if (page.IsNull)
{
// Locking failed. Unload the bitmap and return.
FreeImage.CloseMultiBitmapEx(ref dib);
return;
}
// Get a list of locked pages. This can be usefull to check whether a page has already been locked.
int[] lockedPages = FreeImage.GetLockedPages(dib);
// Lets modify the page.
if (FreeImage.AdjustGamma(page, 2d))
{
Console.WriteLine("Successfully changed gamma of page {0}.", lockedPages[0]);
}
else
{
Console.WriteLine("Failed to adjust gamma ...");
}
// Print out the list of locked pages
foreach (int i in lockedPages)
{
Console.WriteLine("Page {0} is locked.", i);
}
// Use 'UnlockPage' instead of 'Unload' to free the page. Set the third parameter to 'true'
// so that FreeImage can store the changed page within the multipaged bitmap.
FreeImage.UnlockPage(dib, page, true);
// Retieve the list again to see whether unlocking succeeded.
lockedPages = FreeImage.GetLockedPages(dib);
// No output should be produced here.
foreach (int i in lockedPages)
{
Console.WriteLine("Page {0} is still locked.", i);
}
// If there are more than one page we can swap them
if (count > 1)
{
if (!FreeImage.MovePage(dib, 1, 0))
{
Console.WriteLine("Swapping pages failed.");
}
}
if (count > 2)
{
// Lock page 2
page = FreeImage.LockPage(dib, 2);
if (!page.IsNull)
{
// Clone the page for later appending
FIBITMAP temp = FreeImage.Clone(page);
// Unlock the page again
FreeImage.UnlockPage(dib, page, false);
// Delete the page form the multipaged bitmap
FreeImage.DeletePage(dib, 2);
// Append the clone again
FreeImage.AppendPage(dib, temp);
// Check whether the number of pages is still the same
Console.WriteLine("Pages before: {0}. Pages after: {1}", count, FreeImage.GetPageCount(dib));
// Unload clone to prevent memory leak
FreeImage.UnloadEx(ref temp);
}
}
// We are done and close the multipaged bitmap.
if (!FreeImage.CloseMultiBitmapEx(ref dib))
{
Console.WriteLine("Closing bitmap failed!");
}
}
