private async void ChangeImageColorType()
{
//string mime = string.Format("image/png", fileName.Substring(fileName.LastIndexOf('.') + 1));
ImageCodecInfo codec = ColorAndImageFactory.GetEncoderInfo(cmbMime.SelectedItem.ToString());
EncoderParameters encoderParameters = new EncoderParameters(2);
EncoderParameter parameterColorDepth = new EncoderParameter(System.Drawing.Imaging.Encoder.ColorDepth, GetBitCount());
EncoderParameter parameterQuality = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)numericUpDown1.Value.ToInt());
encoderParameters.Param[0] = parameterColorDepth;
encoderParameters.Param[1] = parameterQuality;
using (MemoryStream ms = new MemoryStream()) {
var img = _srcImage;
if (cmbMime.SelectedIndex == 1)
{
img = new Bitmap(_srcImage);
_progress.OperationsTotal = img.Height * 2;
_progress.OperationsDone = 0;
BlockGUI(true);
_progress.ProgressChanged += _progress_ProgressChanged;
await OptimizePNG(img);
_progress.ProgressChanged -= _progress_ProgressChanged;
BlockGUI(false);
}
img.Save(ms, codec, encoderParameters);
_imgBinaryData = ms.ToArray();
lblSize.Text = _imgBinaryData.Length.ToByteMetricString(false);
_image = new Bitmap(ms);
//OptimizePNG();
_area.SetImage(_image);
_area.Redraw();
}
}
private int MinimalRange(Color cl)
{
double res = ColorAndImageFactory.GetColorRangeQ(cl, _Colors[0]);
int resId = -1;
for (int i = 1; i < _Colors.Count; i++)
{
var dif = ColorAndImageFactory.GetColorRangeQ(cl, _Colors[i]);
if (dif < res)
{
res = dif;
resId = i;
}
}
return(resId);
}
private void OptimizePNGStep1(Bitmap image)
{
for (int i = 2; i < image.Height - 2; i++)
{
for (int j = 2; j < image.Width - 2; j++)
{
image.SetPixel(j, i, ColorAndImageFactory.GetMedianFilter(
image.GetPixel(j - 2, i - 2), image.GetPixel(j - 1, i - 2), image.GetPixel(j, i - 2), image.GetPixel(j + 1, i - 2), image.GetPixel(j + 2, i - 2),
image.GetPixel(j - 2, i - 1), image.GetPixel(j - 1, i - 1), image.GetPixel(j, i - 1), image.GetPixel(j + 1, i - 1), image.GetPixel(j + 2, i - 1),
image.GetPixel(j - 2, i), image.GetPixel(j - 1, i), image.GetPixel(j, i), image.GetPixel(j + 1, i), image.GetPixel(j + 2, i),
image.GetPixel(j - 2, i + 1), image.GetPixel(j - 1, i + 1), image.GetPixel(j, i + 1), image.GetPixel(j + 1, i + 1), image.GetPixel(j + 2, i + 1),
image.GetPixel(j - 2, i + 2), image.GetPixel(j - 1, i + 2), image.GetPixel(j, i + 2), image.GetPixel(j + 1, i + 2), image.GetPixel(j + 2, i + 2)
));
}
_progress.OperationsDone++;
}
}
private double MinimalRange(out int color0, out int color1)
{
double res = double.MaxValue;
color0 = 0;
color1 = 0;
for (int i = 0; i < _Colors.Count - 1; i++)
{
double range = ColorAndImageFactory.GetColorRangeQ(_Colors[i], _Colors[i + 1]);
if (range < res)
{
res = range;
color0 = i;
color1 = i + 1;
}
}
return(res);
}
private void button1_Click_1(object sender, EventArgs e)
{
using (SaveFileDialog sfd = new SaveFileDialog()) {
sfd.AddExtension = true;
sfd.CheckPathExists = true;
ImageCodecInfo codec = ColorAndImageFactory.GetEncoderInfo(cmbMime.SelectedItem.ToString());
sfd.Filter = string.Format("Choosen format({0})|{0}", codec.FilenameExtension);
if (sfd.ShowDialog() == DialogResult.Cancel)
{
return;
}
EncoderParameters encoderParameters = new EncoderParameters(2);
EncoderParameter parameterColorDepth = new EncoderParameter(System.Drawing.Imaging.Encoder.ColorDepth, GetBitCount());
EncoderParameter parameterQuality = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)numericUpDown1.Value.ToInt());
encoderParameters.Param[0] = parameterColorDepth;
encoderParameters.Param[1] = parameterQuality;
using (FileStream fs = new FileStream(sfd.FileName, FileMode.Create)) {
fs.Write(_imgBinaryData, 0, _imgBinaryData.Length);
}
}
}
private void OptimizePNGStep0(Bitmap image)
{
Color prev = Color.White;
double difference = 1.0 - (double)numericUpDown1.Value / 100.0;
for (int i = 1; i < image.Height - 1; i++)
{
for (int j = 1; j < image.Width - 1; j++)
{
var color = image.GetPixel(j, i);
if (ColorAndImageFactory.GetColorRangeQ(prev, color) < difference)
{
image.SetPixel(j, i, prev);
}
else
{
prev = color;
}
}
_progress.OperationsDone++;
}
}