private void LoadImage(WriteableBitmap bitmap)
{
if (bitmap.PixelWidth != 0 && bitmap.PixelHeight != 0)
{
this.loadedBitmap = bitmap;
BlurGenTaskData task_data = new BlurGenTaskData();
task_data.radius = this.gaussianRadius;
task_data.width = bitmap.PixelWidth;
task_data.height = bitmap.PixelHeight;
task_data.pixels = bitmap.Pixels;
this.blurGeneratorWorker.RunWorkerAsync(task_data);
this.GenerationProgressIndicator.IsVisible = true;
}
}
private void StartBlurGenerator()
{
if (this.scaledBitmap != null)
{
try
{
BlurGenTaskData task_data = new BlurGenTaskData();
task_data.radius = this.gaussianRadius;
task_data.width = this.scaledBitmap.PixelWidth;
task_data.height = this.scaledBitmap.PixelHeight;
task_data.pixels = this.scaledBitmap.Pixels;
this.blurGeneratorWorker.RunWorkerAsync(task_data);
this.GenerationProgressIndicator.IsVisible = true;
}
catch (Exception)
{
// Ignore
}
}
}
private void blurGeneratorWorker_DoWork(object sender, DoWorkEventArgs e)
{
int radius = (e.Argument as BlurGenTaskData).radius;
int width = (e.Argument as BlurGenTaskData).width;
int height = (e.Argument as BlurGenTaskData).height;
int[] pixels = (e.Argument as BlurGenTaskData).pixels;
int[] blur_pixels = pixels.Clone() as int[];
int[] tab = { 14, 10, 8, 6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2 };
int alpha = (radius < 1) ? 16 : (radius > 17) ? 1 : tab[radius - 1];
int r1 = 0;
int r2 = height - 1;
int c1 = 0;
int c2 = width - 1;
int[] rgba = new int[4];
for (int col = c1; col <= c2; col++)
{
int s = r1 * width + col;
for (int i = 0; i < 4; i++)
{
rgba[i] = ((blur_pixels[s] >> (i * 8)) & 0xFF) << 4;
}
s += width;
for (int j = r1; j < r2; j++, s += width)
{
int p = 0;
for (int i = 0; i < 4; i++)
{
p = p | ((((rgba[i] += ((((blur_pixels[s] >> (i * 8)) & 0xFF) << 4) - rgba[i]) * alpha / 16) >> 4) & 0xFF) << (i * 8));
}
blur_pixels[s] = p;
}
}
for (int row = r1; row <= r2; row++)
{
int s = row * width + c1;
for (int i = 0; i < 4; i++)
{
rgba[i] = ((blur_pixels[s] >> (i * 8)) & 0xFF) << 4;
}
s++;
for (int j = c1; j < c2; j++, s++)
{
int p = 0;
for (int i = 0; i < 4; i++)
{
p = p | ((((rgba[i] += ((((blur_pixels[s] >> (i * 8)) & 0xFF) << 4) - rgba[i]) * alpha / 16) >> 4) & 0xFF) << (i * 8));
}
blur_pixels[s] = p;
}
}
for (int col = c1; col <= c2; col++)
{
int s = r2 * width + col;
for (int i = 0; i < 4; i++)
{
rgba[i] = ((blur_pixels[s] >> (i * 8)) & 0xFF) << 4;
}
s -= width;
for (int j = r1; j < r2; j++, s -= width)
{
int p = 0;
for (int i = 0; i < 4; i++)
{
p = p | ((((rgba[i] += ((((blur_pixels[s] >> (i * 8)) & 0xFF) << 4) - rgba[i]) * alpha / 16) >> 4) & 0xFF) << (i * 8));
}
blur_pixels[s] = p;
}
}
for (int row = r1; row <= r2; row++)
{
int s = row * width + c2;
for (int i = 0; i < 4; i++)
{
rgba[i] = ((blur_pixels[s] >> (i * 8)) & 0xFF) << 4;
}
s--;
for (int j = c1; j < c2; j++, s--)
{
int p = 0;
for (int i = 0; i < 4; i++)
{
p = p | ((((rgba[i] += ((((blur_pixels[s] >> (i * 8)) & 0xFF) << 4) - rgba[i]) * alpha / 16) >> 4) & 0xFF) << (i * 8));
}
blur_pixels[s] = p;
}
}
BlurGenTaskData task_data = new BlurGenTaskData();
task_data.radius = radius;
task_data.width = width;
task_data.height = height;
task_data.pixels = blur_pixels;
e.Result = task_data;
}
