//Based on http://stackoverflow.com/questions/8357173/which-free-image-resizing-library-can-i-use-for-resizing-and-probably-serving-im
private void convertImage(string inFile, imageSizeInfo sizeInfo)
{
string outFile = outputDirectory + Path.GetFileNameWithoutExtension(inFile) + sizeInfo.NameSuffix + Path.GetExtension(inFile);
if (File.Exists(outFile))
{
//Output already exists, no need to re-encode
return;
}
ImageCodecInfo jpgEncoder = null;
//
// Load via stream rather than Image.FromFile to release the file
// handle immediately
//
using (Stream stream = new FileStream(inFile, FileMode.Open))
{
using (Image inImage = Image.FromStream(stream))
{
float width, height;
float srcLeft, srcTop, srcWidth, srcHeight;
float widthRatio = ((float)inImage.Width) / sizeInfo.Size.Width;
float heightRatio = ((float)inImage.Height) / sizeInfo.Size.Height;
if (widthRatio < 0.001)
{
throw new Exception("Image size not reasonable");
}
switch (sizeInfo.Operation)
{
default:
if (widthRatio <= 1.0 && heightRatio <= 1.0)
{
//Just copy the original file
try
{
File.Copy(inFile, outFile, true);
}
catch (IOException ex)
{
Logger.LogError("Could not copy " + inFile + " due to IOException - " + ex.Message);
}
return;
}
else if (widthRatio > heightRatio)
{
width = inImage.Width / widthRatio;
height = inImage.Height / widthRatio;
}
else
{
width = inImage.Width / heightRatio;
height = inImage.Height / heightRatio;
}
srcLeft = 0;
srcTop = 0;
srcWidth = inImage.Width;
srcHeight = inImage.Height;
break;
case ScaleOperation.Crop:
width = sizeInfo.Size.Width;
height = sizeInfo.Size.Height;
if (widthRatio > heightRatio)
{
srcTop = 0;
srcHeight = inImage.Height;
srcWidth = width * heightRatio;
srcLeft = (inImage.Width - srcWidth) / 2f;
}
else
{
srcLeft = 0;
srcWidth = inImage.Width;
srcHeight = height * widthRatio;
srcTop = (inImage.Height - srcHeight) / 2f;
}
break;
}
using (Bitmap bitmap = new Bitmap((int)width, (int)height))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.DrawImage(inImage, new Rectangle(0, 0, (int)width, (int)height), srcLeft, srcTop, srcWidth, srcHeight, GraphicsUnit.Pixel);
if (inImage.RawFormat.Guid == ImageFormat.Jpeg.Guid)
{
if (jpgEncoder == null)
{
ImageCodecInfo[] ici = ImageCodecInfo.GetImageDecoders();
foreach (ImageCodecInfo info in ici)
{
if (info.FormatID == ImageFormat.Jpeg.Guid)
{
jpgEncoder = info;
break;
}
}
}
if (jpgEncoder != null)
{
EncoderParameters ep = new EncoderParameters(1);
ep.Param[0] = new EncoderParameter(Encoder.Quality, (long)sizeInfo.QpalityPercent);
bitmap.Save(outFile, jpgEncoder, ep);
}
else
{
bitmap.Save(outFile, inImage.RawFormat);
}
}
else
{
// Fill with white for transparent GIFs
//graphics.FillRectangle(Brushes.White, 0, 0, bitmap.Width, bitmap.Height);
bitmap.Save(outFile, inImage.RawFormat);
}
}
}
}
}
}
private void loadSizesFromFile(string[] fileLines)
{
foreach (string l in fileLines)
{
//Ignore whitspace lines
if (l.Trim().Length == 0) continue;
//Ignore comment lines
if (l.Trim().StartsWith("#")) continue;
string[] parts = l.Trim().Split(" \t".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
if (parts.Length < 1)
{
Logger.LogWarning("Ignoring " + l + " in " + SIZES_FILE);
continue;
}
if (parts.Length == 0) continue;
Size imageSize;
ScaleOperation operation = ScaleOperation.Scale;
string suffix = null;
byte imageQuality = JPEG_QUALITY;
string[] sizeOperationParts = parts[0].Split(':');
if (sizeOperationParts.Length > 1)
{
if(sizeOperationParts[1].ToLower() == "crop")
{
operation = ScaleOperation.Crop;
}
else
{
Logger.LogWarning("Unknown image processing option " + sizeOperationParts[0] + " in " + SIZES_FILE);
}
}
string[] dimensions = sizeOperationParts[0].Split('x');
if(dimensions.Length == 2)
{
int width, height;
if(!int.TryParse(dimensions[0], out width) || !int.TryParse(dimensions[1], out height))
{
Logger.LogWarning("The value " + parts[0] + " in " + SIZES_FILE + " could not recognised as an image size. Expected <integer>x<integer>");
continue;
}
if(width < 1 || height < 1)
{
Logger.LogWarning("Both width and height must be positive integers - " + parts[0] + " in " + SIZES_FILE);
continue;
}
imageSize = new Size() { Width = width, Height = height };
}
else
{
Logger.LogWarning("The value " + parts[0] + " in " + SIZES_FILE + " could not recognised as an image size. Expected <integer>x<integer>");
continue;
}
if(parts.Length > 1)
{
suffix = parts[1];
}
else
{
suffix = "";
}
if(parts.Length > 2)
{
if(parts[2].EndsWith("%"))
{
byte quality;
if(byte.TryParse(parts[2].Substring(0, parts[2].Length - 1), out quality))
{
if(quality > 1 && quality <= 100) imageQuality = quality;
}
}
else
{
Logger.LogMessage("Third argument on " + l + " in " + SIZES_FILE + " was not a percentage. Expected 'NN%'");
}
}
imageSizeInfo isi = new imageSizeInfo() { NameSuffix = suffix, Size = imageSize , QpalityPercent = imageQuality, Operation = operation};
imageSizes.Add(isi);
}
}
private void loadSizesFromFile(string[] fileLines)
{
foreach (string l in fileLines)
{
//Ignore whitspace lines
if (l.Trim().Length == 0)
{
continue;
}
//Ignore comment lines
if (l.Trim().StartsWith("#"))
{
continue;
}
string[] parts = l.Trim().Split(" \t".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
if (parts.Length < 1)
{
Logger.LogWarning("Ignoring " + l + " in " + SIZES_FILE);
continue;
}
if (parts.Length == 0)
{
continue;
}
Size imageSize;
ScaleOperation operation = ScaleOperation.Scale;
string suffix = null;
byte imageQuality = JPEG_QUALITY;
string[] sizeOperationParts = parts[0].Split(':');
if (sizeOperationParts.Length > 1)
{
if (sizeOperationParts[1].ToLower() == "crop")
{
operation = ScaleOperation.Crop;
}
else
{
Logger.LogWarning("Unknown image processing option " + sizeOperationParts[0] + " in " + SIZES_FILE);
}
}
string[] dimensions = sizeOperationParts[0].Split('x');
if (dimensions.Length == 2)
{
int width, height;
if (!int.TryParse(dimensions[0], out width) || !int.TryParse(dimensions[1], out height))
{
Logger.LogWarning("The value " + parts[0] + " in " + SIZES_FILE + " could not recognised as an image size. Expected <integer>x<integer>");
continue;
}
if (width < 1 || height < 1)
{
Logger.LogWarning("Both width and height must be positive integers - " + parts[0] + " in " + SIZES_FILE);
continue;
}
imageSize = new Size()
{
Width = width, Height = height
};
}
else
{
Logger.LogWarning("The value " + parts[0] + " in " + SIZES_FILE + " could not recognised as an image size. Expected <integer>x<integer>");
continue;
}
if (parts.Length > 1)
{
suffix = parts[1];
}
else
{
suffix = "";
}
if (parts.Length > 2)
{
if (parts[2].EndsWith("%"))
{
byte quality;
if (byte.TryParse(parts[2].Substring(0, parts[2].Length - 1), out quality))
{
if (quality > 1 && quality <= 100)
{
imageQuality = quality;
}
}
}
else
{
Logger.LogMessage("Third argument on " + l + " in " + SIZES_FILE + " was not a percentage. Expected 'NN%'");
}
}
imageSizeInfo isi = new imageSizeInfo()
{
NameSuffix = suffix, Size = imageSize, QpalityPercent = imageQuality, Operation = operation
};
imageSizes.Add(isi);
}
}
//Based on http://stackoverflow.com/questions/8357173/which-free-image-resizing-library-can-i-use-for-resizing-and-probably-serving-im
private void convertImage(string inFile, imageSizeInfo sizeInfo)
{
string outFile = outputDirectory + Path.GetFileNameWithoutExtension(inFile) + sizeInfo.NameSuffix + Path.GetExtension(inFile);
if(File.Exists(outFile))
{
//Output already exists, no need to re-encode
return;
}
ImageCodecInfo jpgEncoder = null;
//
// Load via stream rather than Image.FromFile to release the file
// handle immediately
//
using (Stream stream = new FileStream(inFile, FileMode.Open))
{
using (Image inImage = Image.FromStream(stream))
{
float width, height;
float srcLeft, srcTop, srcWidth, srcHeight;
float widthRatio = ((float)inImage.Width) / sizeInfo.Size.Width;
float heightRatio = ((float)inImage.Height) / sizeInfo.Size.Height;
if(widthRatio < 0.001)
{
throw new Exception("Image size not reasonable");
}
switch(sizeInfo.Operation)
{
default:
if(widthRatio <= 1.0 && heightRatio <= 1.0)
{
//Just copy the original file
try
{
File.Copy(inFile, outFile, true);
}
catch(IOException ex)
{
Logger.LogError("Could not copy " + inFile + " due to IOException - " + ex.Message);
}
return;
}
else if (widthRatio > heightRatio)
{
width = inImage.Width / widthRatio;
height = inImage.Height / widthRatio;
}
else
{
width = inImage.Width / heightRatio;
height = inImage.Height / heightRatio;
}
srcLeft = 0;
srcTop = 0;
srcWidth = inImage.Width;
srcHeight = inImage.Height;
break;
case ScaleOperation.Crop:
width = sizeInfo.Size.Width;
height = sizeInfo.Size.Height;
if(widthRatio > heightRatio)
{
srcTop = 0;
srcHeight = inImage.Height;
srcWidth = width * heightRatio;
srcLeft = (inImage.Width - srcWidth) / 2f;
}
else
{
srcLeft = 0;
srcWidth = inImage.Width;
srcHeight = height * widthRatio;
srcTop = (inImage.Height - srcHeight) / 2f;
}
break;
}
using (Bitmap bitmap = new Bitmap((int)width, (int)height))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.DrawImage(inImage, new Rectangle(0, 0, (int)width, (int)height), srcLeft, srcTop, srcWidth, srcHeight, GraphicsUnit.Pixel);
if (inImage.RawFormat.Guid == ImageFormat.Jpeg.Guid)
{
if (jpgEncoder == null)
{
ImageCodecInfo[] ici = ImageCodecInfo.GetImageDecoders();
foreach (ImageCodecInfo info in ici)
{
if (info.FormatID == ImageFormat.Jpeg.Guid)
{
jpgEncoder = info;
break;
}
}
}
if (jpgEncoder != null)
{
EncoderParameters ep = new EncoderParameters(1);
ep.Param[0] = new EncoderParameter(Encoder.Quality, (long)sizeInfo.QpalityPercent);
bitmap.Save(outFile, jpgEncoder, ep);
}
else
bitmap.Save(outFile, inImage.RawFormat);
}
else
{
// Fill with white for transparent GIFs
//graphics.FillRectangle(Brushes.White, 0, 0, bitmap.Width, bitmap.Height);
bitmap.Save(outFile, inImage.RawFormat);
}
}
}
}
}
}
