private void PreRender()
{
if (FileName == null)
{
return;
}
if (checkBenchmark.Checked == true)
{
Benchmark.Start();
}
btmap = (Bitmap)Image.FromFile(FileName);
LockBitmap lBtmap = new LockBitmap(btmap);
lBtmap.LockBits();
GrayscaleRend(lBtmap);
lBtmap.UnlockBits();
pictureBox2.Image = (Image)btmap;
if (checkBenchmark.Checked == true)
{
Benchmark.End();
MessageBox.Show("Время " + Benchmark.GetSeconds());
}
}
private void GrayscaleRend(LockBitmap lBtmap)
{
int width = lBtmap.Width;
int height = lBtmap.Height;
progressBar1.Value = 0;
progressBar1.Maximum = height;
Color clr;
int Rproc = (int)((100.000 / trackR.Maximum) * trackR.Value);
int Gproc = (int)((100.000 / trackG.Maximum) * trackG.Value);
int Bproc = (int)((100.000 / trackB.Maximum) * trackB.Value);
int bright = (int)((100.000 / trackBright.Maximum) * trackBright.Value);
int Contrast = (int)((100.000 / trackContrast.Maximum) * trackContrast.Value);
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
clr = lBtmap.GetPixel(x, y);
int R1 = clr.R + Rproc * 128 / 100 <= 0 ? 0 : clr.R + Rproc * 128 / 100 >= 255 ? 255 : clr.R + Rproc * 128 / 100;
int G1 = clr.G + Gproc * 128 / 100 <= 0 ? 0 : clr.G + Gproc * 128 / 100 >= 255 ? 255 : clr.G + Gproc * 128 / 100;
int B1 = clr.B + Bproc * 128 / 100 <= 0 ? 0 : clr.B + Bproc * 128 / 100 >= 255 ? 255 : clr.B + Bproc * 128 / 100;
int R2 = R1 + bright * 128 / 100 <= 0 ? 0 : R1 + bright * 128 / 100 >= 255 ? 255 : R1 + bright * 128 / 100;
int G2 = G1 + bright * 128 / 100 <= 0 ? 0 : G1 + bright * 128 / 100 >= 255 ? 255 : G1 + bright * 128 / 100;
int B2 = B1 + bright * 128 / 100 <= 0 ? 0 : B1 + bright * 128 / 100 >= 255 ? 255 : B1 + bright * 128 / 100;
int R3 = Contrast < 0 ? (R2 * (100 - Contrast) + 128 * Contrast) / 100 : (R2 * 100 - 128 * Contrast) / (101 - Contrast);
int R4 = R3 < 0 ? R4 = 0 : R3 > 255 ? R4 = 255 : R3;
int G3 = Contrast < 0 ? (G2 * (100 - Contrast) + 128 * Contrast) / 100 : (G2 * 100 - 128 * Contrast) / (101 - Contrast);
int G4 = G3 < 0 ? G4 = 0 : G3 > 255 ? G4 = 255 : G3;
int B3 = Contrast < 0 ? (B2 * (100 - Contrast) + 128 * Contrast) / 100 : (B2 * 100 - 128 * Contrast) / (101 - Contrast);
int B4 = B3 < 0 ? B4 = 0 : B3 > 255 ? B4 = 255 : B3;
int A = clr.A;
int R = R4;
int G = G4;
int B = B4;
if (checkGrayscale.Checked == true)
{
int avr = (R + G + B) / 3;
lBtmap.SetPixel(x, y, Color.FromArgb(A, avr, avr, avr));
}
else
{
lBtmap.SetPixel(x, y, Color.FromArgb(A, R, G, B));
}
}
progressBar1.Value++;
}
}