private static void WriteOutputImage(string outputFile, OutputType outputType, int width, int height, byte[] bitmap)
{
Console.WriteLine("Writing {0}", outputFile);
using (var stream = File.Create(outputFile))
{
var imageWriter = new ImageWriter();
switch (outputType)
{
case OutputType.Jpg:
imageWriter.WriteJpg(bitmap, width, height, StbImageWriteSharp.ColorComponents.RedGreenBlueAlpha, stream, 90);
break;
case OutputType.Png:
imageWriter.WritePng(bitmap, width, height, StbImageWriteSharp.ColorComponents.RedGreenBlueAlpha, stream);
break;
case OutputType.Tga:
imageWriter.WriteTga(bitmap, width, height, StbImageWriteSharp.ColorComponents.RedGreenBlueAlpha, stream);
break;
case OutputType.Bmp:
imageWriter.WriteBmp(bitmap, width, height, StbImageWriteSharp.ColorComponents.RedGreenBlueAlpha, stream);
break;
case OutputType.Hdr:
imageWriter.WriteHdr(bitmap, width, height, StbImageWriteSharp.ColorComponents.RedGreenBlueAlpha, stream);
break;
}
}
}
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);
}
}
private void buttonSave_Click(object sender, EventArgs e)
{
try
{
string fileName;
using (var dlg = new SaveFileDialog())
{
dlg.Filter =
"BMP Files (*.bmp)|*.bmp|TGA Files (*.tga)|*.tga|PNG Files (*.png)|*.png|HDR Files (*.hdr)|*.hdr|JPG Files (*.jpg)|*.jpg";
if (dlg.ShowDialog() != DialogResult.OK)
{
return;
}
fileName = dlg.FileName;
}
// Get bitmap bytes
var bmp = (Bitmap)pictureBox1.Image;
var x = bmp.Width;
var y = bmp.Height;
var bmpData = bmp.LockBits(new Rectangle(0, 0, x, y), ImageLockMode.ReadOnly, bmp.PixelFormat);
var data = new byte[y * bmpData.Stride];
Marshal.Copy(bmpData.Scan0, data, 0, bmpData.Stride * bmp.Height);
bmp.UnlockBits(bmpData);
// Convert bgra to rgba
for (var i = 0; i < x * y; ++i)
{
var b = data[i * 4];
var g = data[i * 4 + 1];
var r = data[i * 4 + 2];
var a = data[i * 4 + 3];
data[i * 4] = r;
data[i * 4 + 1] = g;
data[i * 4 + 2] = b;
data[i * 4 + 3] = a;
}
// Call StbSharp
using (var stream = File.Create(fileName))
{
var writer = new ImageWriter();
var image = new Image
{
Data = data,
Width = x,
Height = y,
Comp = 4
};
if (fileName.EndsWith(".bmp"))
{
writer.WriteBmp(image, stream);
}
else if (fileName.EndsWith(".tga"))
{
writer.WriteTga(image, stream);
}
else if (fileName.EndsWith("png"))
{
writer.WritePng(image, stream);
}
else if (fileName.EndsWith("hdr"))
{
writer.WriteHdr(image, stream);
}
else if (fileName.EndsWith("jpg") || fileName.EndsWith("jpeg"))
{
writer.WriteJpg(image, stream, 75);
}
}
}
catch (Exception ex)
{
MessageBox.Show("Error", ex.Message);
}
}