public override void ApplyFilter(ImageGenerationContext context, FastBitmap bitmap)
{
if (Width == Unit.Empty && Height == Unit.Empty)
throw new DynamicImageException("At least one of Width or Height must be set.");
string sourceFileName = Path.GetTempFileName();
try
{
bitmap.Save(sourceFileName);
string outputFileName = Path.GetTempFileName();
try
{
int width = (Width == Unit.Empty) ? bitmap.Width : Unit.GetCalculatedValue(Width, bitmap.Width);
int height = (Height == Unit.Empty) ? bitmap.Height : Unit.GetCalculatedValue(Height, bitmap.Height);
new CairWrapper(context).ProcessImage(sourceFileName, outputFileName, int.MaxValue,
width, height, ConvolutionType);
FastBitmap output = new FastBitmap(File.ReadAllBytes(outputFileName));
if (output.InnerBitmap != null)
bitmap.InnerBitmap = output.InnerBitmap;
}
finally
{
File.Delete(outputFileName);
}
}
finally
{
File.Delete(sourceFileName);
}
}
public void CropFilter_UseXYWidthHeight_CalculatedCorrectly()
{
FastBitmap bitmap = new FastBitmap("Filters\\Images\\Tulips.png", UriKind.Relative);
CropFilter cropFilter = new CropFilter();
cropFilter.X = 30;
cropFilter.Y = 30;
cropFilter.Width = 200;
cropFilter.Height = 200;
cropFilter.ApplyFilter(bitmap);
Assert.AreEqual(200, bitmap.Width);
Assert.AreEqual(200, bitmap.Height);
bitmap.Save("TulipsCropped200x200.png");
FastBitmap expectedBitmap = new FastBitmap("Filters\\Images\\TulipsCropped200x200.png", UriKind.Relative);
FastBitmapTestUtility.AssertEqual(expectedBitmap, bitmap);
}
