public unsafe Image CreateResized(int newWidth, int newHeight)
{
var result = new Image
{
Comp = Comp,
SourceComp = SourceComp,
Data = new byte[newWidth * newHeight * Comp],
Width = newWidth,
Height = newHeight
};
fixed(byte *input = Data)
{
fixed(byte *output = result.Data)
{
StbImageResize.stbir_resize_uint8(input, Width, Height, Width * Comp, output, newWidth, newHeight, newWidth * Comp,
Comp);
}
}
return(result);
}
static void Main(string[] args)
{
if (args.Length < 2)
{
Console.WriteLine("Usage: StbImageResizeSharp.Converter.exe <input_image_file> <output_image_file> [new_width] [new_height]");
Console.WriteLine("Example: StbImageResizeSharp.Converter.exe image.jpg image.png 400 400");
return;
}
try
{
OutputType outputType = OutputType.Png;
var ext = Path.GetExtension(args[1]);
if (string.IsNullOrEmpty(ext))
{
throw new Exception("Output file lacks extension. Hence it is not possible to determine output file type");
}
if (ext.StartsWith("."))
{
ext = ext.Substring(1);
}
ext = ext.ToLower();
switch (ext)
{
case "jpg":
case "jpeg":
outputType = OutputType.Jpg;
break;
case "png":
outputType = OutputType.Png;
break;
case "tga":
outputType = OutputType.Tga;
break;
case "bmp":
outputType = OutputType.Bmp;
break;
case "hdr":
outputType = OutputType.Hdr;
break;
default:
throw new Exception("Output format '" + ext + "' is not supported.");
}
// Load image
ImageResult image;
using (var stream = File.OpenRead(args[0]))
{
image = ImageResult.FromStream(stream);
}
// Parse new size
var newWidth = image.Width;
var newHeight = image.Height;
if (args.Length >= 3)
{
newWidth = int.Parse(args[2]);
}
if (args.Length >= 4)
{
newHeight = int.Parse(args[3]);
}
var newData = image.Data;
var channels = (int)image.Comp;
// Resize if needed
if (newWidth != image.Width && newHeight != image.Height)
{
newData = new byte[newWidth * newHeight * channels];
StbImageResize.stbir_resize_uint8(image.Data, image.Width, image.Height, image.Width * channels,
newData, newWidth, newHeight, newWidth * channels, channels);
}
// Save
using (var stream = File.Create(args[1]))
{
var imageWriter = new ImageWriter();
switch (outputType)
{
case OutputType.Jpg:
imageWriter.WriteJpg(newData, newWidth, newHeight, (StbImageWriteSharp.ColorComponents)channels, stream, 90);
break;
case OutputType.Png:
imageWriter.WritePng(newData, newWidth, newHeight, (StbImageWriteSharp.ColorComponents)channels, stream);
break;
case OutputType.Tga:
imageWriter.WriteTga(newData, newWidth, newHeight, (StbImageWriteSharp.ColorComponents)channels, stream);
break;
case OutputType.Bmp:
imageWriter.WriteBmp(newData, newWidth, newHeight, (StbImageWriteSharp.ColorComponents)channels, stream);
break;
case OutputType.Hdr:
imageWriter.WriteHdr(newData, newWidth, newHeight, (StbImageWriteSharp.ColorComponents)channels, stream);
break;
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}