private static Image OpenImage(string path, bool cache)
{
if (_cachedImage.Path != null && _cachedImage.Path.Equals(path))
{
return(_cachedImage);
}
var len = path.Length;
if (len < 5)
{
throw new ArgumentException(@"path is too short.", @"path");
}
var ext = Path.GetExtension(path);
var image = ext.EndsWith(@"ppm", StringComparison.OrdinalIgnoreCase)
? PPM.Read(path)
: ReadImage(path);
image.Serial = _serialIndex++;
if (cache)
{
_cachedImage = image;
}
return(image);
}
private static void Frame(ref Movement movement, float x, float y, float z)
{
var crossdata = new Pixel[0];
if (_lastResizeX == -1)
{
_lastFilename = string.Empty;
}
// Calculate Resize
float fx = movement.Width;
fx *= z;
var resizeX = (int)fx;
if (resizeX < _outputWidth)
{
resizeX = _outputWidth;
}
float fy = movement.Height;
fy *= z;
var resizeY = (int)fy;
if (resizeY < _outputHeight)
{
resizeY = _outputHeight;
}
// Calculate Crop
fx = x * z;
var cropX = (int)fx;
cropX -= _outputWidth / 2;
if (cropX < 0)
{
cropX = 0;
}
fy = y * z;
var cropY = (int)fy;
cropY -= _outputHeight / 2;
if (cropY < 0)
{
cropY = 0;
}
var path = string.Format("{0}{1}{2:D5}.{3}", _tmpdir, Path.DirectorySeparatorChar, _frameCount, _outputFormat.ToString().ToLowerInvariant());
_image = OpenImage(movement.Filename, true);
Console.Write(@"Creating frame #{0} at x={1:0.00} y={2:0.00} and zoom {3:0.00}", _frameCount, x, y, z);
var stopWatch = new Stopwatch();
stopWatch.Start();
var ppm = _fastRender
? ResizeFast(_image, x, y, z)
: Resize(_image, x, y, z);
stopWatch.Stop();
Console.WriteLine(@" {0}", stopWatch.ElapsedMilliseconds);
if (movement.Crossfade > 0)
{
var crossedjpg = OpenImage(path, false);
crossdata = crossedjpg.Pixels;
}
if (crossdata.Length > 0)
{
var bytecount = _outputWidth * _outputHeight;
float ratioA = movement.Crossfade;
float ratioB = movement.CrossFrames;
ratioA /= ratioB;
ratioB = 1 - ratioA;
for (var i = 0; i < bytecount; i++)
{
var valueA = crossdata[i];
var valueB = ppm[i];
var mixedvalue = ppm[i];
mixedvalue.R = (byte)(valueA.R * ratioA + valueB.R * ratioB);
mixedvalue.G = (byte)(valueA.G * ratioA + valueB.G * ratioB);
mixedvalue.B = (byte)(valueA.B * ratioA + valueB.B * ratioB);
ppm[i] = mixedvalue;
}
movement.Crossfade--;
}
else
{
movement.Crossfade = 0;
movement.CrossFrames = 0;
}
var res = new Image
{
Height = _outputHeight,
Path = path,
Pixels = ppm,
Width = _outputWidth
};
if (_showOutput)
{
ShowImage(res);
}
if (_outputFormat == OutputFormat.JPG)
{
WriteJPG(res, path);
}
else
{
PPM.Write(res, path);
}
if (!movement.Filename.Equals(_lastFilename, StringComparison.Ordinal) ||
_lastResizeX != resizeX ||
_lastResizeY != resizeY ||
_lastCropX != cropX ||
_lastCropY != cropY)
{
_lastFilename = movement.Filename;
_lastResizeX = resizeX;
_lastResizeY = resizeY;
_lastCropX = cropX;
_lastCropY = cropY;
}
_frameCount++;
}
