private Stream ResizeImage(Stream image_stream, int width, int height, int quality, ImageType type)
{
try {
// Load the image as a writeablebitmap
WriteableBitmap writableBitmap;
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.SetSource(image_stream);
writableBitmap = new WriteableBitmap(bitmapImage);
double scale = Math.Min((double) width / writableBitmap.PixelWidth, (double) height / writableBitmap.PixelHeight);
// No resize needed
if (scale >= 1.0)
return image_stream;
// Setup shorter names and pixelbuffers
int w = writableBitmap.PixelWidth;
int h = writableBitmap.PixelHeight;
int[] p = writableBitmap.Pixels;
byte[][,] imageRaster = new byte[3][,]; // RGB colors
imageRaster[0] = new byte[w, h];
imageRaster[1] = new byte[w, h];
imageRaster[2] = new byte[w, h];
// Copy WriteableBitmap data into buffer for FluxJpeg
int i = 0;
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
int color = p[i++];
imageRaster[0][x, y] = (byte) (color >> 16); // R
imageRaster[1][x, y] = (byte) (color >> 8); // G
imageRaster[2][x, y] = (byte) (color); // B
}
}
// Create new FluxJpeg image based on pixel data
FluxJpeg.Core.Image jpegImage = new FluxJpeg.Core.Image(new ColorModel {
colorspace = ColorSpace.RGB
}, imageRaster);
// Calc new proportional size
width = (int) Math.Round(writableBitmap.PixelWidth * scale);
height = (int) Math.Round(writableBitmap.PixelHeight * scale);
// Resize the image
ImageResizer resizer = new ImageResizer(jpegImage);
Image resizedImage = resizer.Resize(width, height, FluxJpeg.Core.Filtering.ResamplingFilters.LowpassAntiAlias);
Stream imageStream = new MemoryStream();
if (type == ImageType.Jpeg) {
// Encode the resized image as Jpeg
JpegEncoder jpegEncoder = new JpegEncoder(resizedImage, quality, imageStream);
jpegEncoder.Encode();
} else {
int[] pixelBuffer = new int[resizedImage.Height * resizedImage.Width];
byte[][,] resizedRaster = resizedImage.Raster;
// Convert FJCore raster to PixelBuffer
for (int y = 0; y < resizedImage.Height; y++) {
for (int x = 0; x < resizedImage.Width; x++) {
int color = 0;
color = color | resizedRaster[0][x, y] << 16; // R
color = color | resizedRaster[1][x, y] << 8; // G
color = color | resizedRaster[2][x, y]; // B
pixelBuffer[(y * resizedImage.Width) + x] = color;
}
}
// Encode the resized image as Png
PngEncoder pngEncoder = new PngEncoder(pixelBuffer, resizedImage.Width, resizedImage.Height, false, PngEncoder.FILTER_NONE, Deflater.BEST_COMPRESSION);
byte[] pngBuffer = pngEncoder.pngEncode();
imageStream.Write(pngBuffer, 0, pngBuffer.Length);
}
return imageStream;
} catch {
// Ignore the error and let the server resize the image
}
return image_stream;
}
/// <summary>
/// This is a javascript application.
/// </summary>
/// <param name="page">HTML document rendered by the web server which can now be enhanced.</param>
public Application(IApp page)
{
// jsc able to take a random open source project
// to encode a png file on the client, worker?
// the code seems to be pre compiling.
// how to use it?
//Error 9 Unsafe code may only appear if compiling with /unsafe X:\jsc.svn\examples\javascript\io\synergy\PNGEncoderExperiment\PNGEncoderExperiment\opensource\FJCore\Image.cs 147 13 PNGEncoderExperiment
//Error 1 'FluxJpeg.Core.HuffmanTable' does not contain a definition for 'Decode' and no extension method 'Decode' accepting a first argument of type 'FluxJpeg.Core.HuffmanTable' could be found(are you missing a using directive or an assembly reference ?) X:\jsc.svn\examples\javascript\io\synergy\PNGEncoderExperiment\PNGEncoderExperiment\opensource\FJCore\Decoder\JpegComponent.cs 468 29 PNGEncoderExperiment
// X:\jsc.svn\examples\javascript\io\synergy\PNGEncoderExperiment\PNGEncoderExperiment\opensource\FJCore\Image.cs
// 147
// is jsc ready for unsafe byte opcodes yet?
// be have byref, async, why not also support pointers then?
// #if SILVERLIGHT
//0200002b Plupload.PngEncoder.PngEncoder
//script: error JSC1000: Missing Script Attribute? Native constructor was invoked, please implement[System.IO.MemoryStream..ctor(System.Int32)]
// 0200002b Plupload.PngEncoder.PngEncoder
// script: error JSC1000: opcode unsupported - [0x01d7] bne.un + 0 - 2{[0x01ce]
//rem
// script: error JSC1000: error at Plupload.PngEncoder.PngEncoder.WriteImageData,
// seems to be return from within try.
// could the rewriter fix it for us?
// X:\jsc.svn\examples\javascript\Test\TestReturnFromWithinTry\TestReturnFromWithinTry\Application.cs
// or we fix this source for now?
var w = 128;
var h = 128;
// black pixels?
var data = new int[w * h];
var p = new PngEncoder(
data,
w,
h,
true,
PngEncoder.FILTER_NONE,
0
);
// script: error JSC1000: unsupported flow detected, try to simplify.
//Assembly U:\PNGEncoderExperiment.Application.exe
//DeclaringType Plupload.PngEncoder.DeflaterHuffman + Tree, PNGEncoderExperiment.Application,
//OwnerMethod BuildTree
// Offset 030d
var bytes = p.pngEncode();
new IHTMLPre { new { bytes } }.AttachToDocument();
}