/// <summary>
/// Executes the request.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="request">The request.</param>
/// <exception cref="TextureToolsException">No available library could perform the task : + request.Type</exception>
private void ExecuteRequest(TexImage image, IRequest request)
{
// First Check if the current library can handle the request
if (image.CurrentLibrary != null && image.CurrentLibrary.CanHandleRequest(image, request))
{
image.CurrentLibrary.Execute(image, request);
}
else // Otherwise, it finds another library which can handle the request
{
ITexLibrary library;
if ((library = FindLibrary(image, request)) != null)
{
if (image.Format.IsBGRAOrder() && !library.SupportBGRAOrder())
{
SwitchChannel(image);
}
if(image.CurrentLibrary != null) image.CurrentLibrary.EndLibrary(image); // Ending the use of the previous library (mainly to free memory)
library.StartLibrary(image); // Preparing the new library : converting TexImage format to the library native format
library.Execute(image, request);
image.CurrentLibrary = library;
}
else // If no library could be found, an exception is thrown
{
Log.Error("No available library could perform the task : " + request.Type);
throw new TextureToolsException("No available library could perform the task : " + request.Type);
}
}
}
/// <summary>
/// Finds a suitable library to handle the request.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="request">The request.</param>
/// <returns>The <see cref="ITexLibrary"/> which can handle the request or null if none could.</returns>
private ITexLibrary FindLibrary(TexImage image, IRequest request)
{
foreach (var library in textureLibraries)
{
if (library.CanHandleRequest(image, request))
{
return library;
}
}
return null;
}