public void GenerateCoverImageOfRequestedMaxSize_GivenVariousThmbnailSizes_ThumbnailIsCorrectSize(int requestedSize, int originalWidth, int originalHeight, int expectedWidth, int expectedHeight)
{
// Setup
var book = SetupBook("coverImage.png", originalWidth, originalHeight);
// System under test
BookThumbNailer.GenerateCoverImageOfRequestedMaxSize(book, requestedSize);
// Verification
string expectedThumbnailFilename = book.FolderPath.CombineForPath($"thumbnail-{requestedSize}.png");
Assert.That(RobustFile.Exists(expectedThumbnailFilename), Is.True, "Thumbnail does not exist at expected path");
using (var image = System.Drawing.Image.FromFile(expectedThumbnailFilename))
{
Assert.That(image.Width, Is.EqualTo(expectedWidth), "image width");
Assert.That(image.Height, Is.EqualTo(expectedHeight), "image height");
}
}
public static void CreateThumbnailArtifact(CreateArtifactsParameters parameters)
{
if (String.IsNullOrWhiteSpace(parameters.ThumbnailOutputInfoPath))
{
return;
}
var outputPaths = new List <string>();
int[] requestedHeights = new int[2] {
256, 70
};
foreach (int height in requestedHeights)
{
// A potential "enhancement" is that we could try to re-use the thumbnail generated when making an ePUB.
// That could be helpful if creating new thumbnails was a big enough cost
// The ePub Path looks like this: $"%TEMP%\\ePUB_export\\{i}\\{book.Title}\\thumbnail-{height}.png"
// (where i is an integer between 0-19. Depends on whether it's been locked or not.)
//
// For now, we'll just create the thumbnail every time
// It makes the code simpler than having fallback logic not to mention the complications of determining which folder the ePub is in, whether it's really up-to-date, etc.
string thumbnailPath = BookThumbNailer.GenerateCoverImageOfRequestedMaxSize(_book, height);
AppendPathIfExists(thumbnailPath, outputPaths);
}
string shareThumbnail = BookThumbNailer.GenerateSocialMediaSharingThumbnail(_book);
AppendPathIfExists(shareThumbnail, outputPaths);
using (var writer = new StreamWriter(parameters.ThumbnailOutputInfoPath, append: false))
{
foreach (var path in outputPaths)
{
writer.WriteLine(path);
}
}
}