/// <summary>
/// Modifies the brightness of the given file.
/// </summary>
/// <param name="dblAffect">>How to modify. Value of 1 leaves alone, 0.x darkens, 1.x is to lightens.</param>
/// <param name="originalPathFile">Source file, could be the same as the change file.</param>
/// <param name="changeImagePathFile">The file to receive the change.</param>
/// <returns>True for success.</returns>
public bool Brightness(double brightValue, string originalPathFile, string changeImagePathFile)
{
bool bRet = false;
if (null == originalPathFile) return false;
if (null == changeImagePathFile) return false;
if (originalPathFile.Length > 0) // may have been set at creation, so not given
m_originalFile = originalPathFile;
// Fix slashes - never trust that they have done this.
m_originalFile = m_originalFile.Replace('/', '\\').Replace("\\\\", "\\");
changeImagePathFile = changeImagePathFile.Replace('/', '\\').Replace("\\\\", "\\");
// use cximage library instead of .Net code
if (m_originalFile != changeImagePathFile)
{
// copy file to new if needed
StorageClient.Context.File.Copy(m_originalFile, changeImagePathFile, true);
MakeWriteable(changeImagePathFile); // in case the original was readonly
}
if (brightValue != 1.0)
{
ImageGalleryInterop.CImageResizerClass ig = new ImageGalleryInterop.CImageResizerClass();
ig.BrightenImageFile(changeImagePathFile, brightValue);
}
/*
System.Drawing.Image img = System.Drawing.Image.FromFile(m_originalFile);
Bitmap bmpImage = new Bitmap(img);
img.Dispose(); // Free up the file for changes
Color pixel;
int r, g, b;
for (int y = 0; y < bmpImage.Height; y++)
{
for (int x = 0; x < bmpImage.Width; x++)
{
pixel = bmpImage.GetPixel(x, y);
r = (int)((double)pixel.R * brightValue); if (r < 0) r = 0; if (r > 255) r = 255;
g = (int)((double)pixel.G * brightValue); if (g < 0) g = 0; if (g > 255) g = 255;
b = (int)((double)pixel.B * brightValue); if (b < 0) b = 0; if (b > 255) b = 255;
bmpImage.SetPixel(x, y, Color.FromArgb(r, g, b));
}
}
bmpImage.Save(changeImagePathFile);
// Save for convenient use.
m_width = bmpImage.Width;
m_height = bmpImage.Height;
bmpImage.Dispose();
*/
m_localResultFile = changeImagePathFile;
bRet = true;
return bRet;
}
