| private WritePixel ( Pixel pixel, Byte buffer = null ) : void | ||
| pixel | Pixel | |
| buffer | Byte | |
| return | void | |
private void TransformPerPixelBase(ImageBuffer target, IList<Point> path, Delegate transformAction, Int32 parallelTaskCount = 4)
{
// checks parameters
Guard.CheckNull(path, "path");
Guard.CheckNull(target, "target");
Guard.CheckNull(transformAction, "transformAction");
// updates the palette
UpdatePalette();
target.UpdatePalette();
// checks the dimensions
if (Width != target.Width || Height != target.Height)
{
const String message = "Both images have to have the same dimensions.";
throw new ArgumentOutOfRangeException(message);
}
// determines mode
Boolean isAdvanced = transformAction is TransformPixelAdvancedFunction;
// process the image in a parallel manner
Action<LineTask> transformPerPixel = lineTask =>
{
// creates individual pixel structures per task
Pixel sourcePixel = new Pixel(this);
Pixel targetPixel = new Pixel(target);
// enumerates the pixels row by row
for (Int32 pathOffset = lineTask.StartOffset; pathOffset < lineTask.EndOffset; pathOffset++)
{
Point point = path[pathOffset];
Boolean allowWrite;
// enumerates the pixel, and returns the control to the outside
sourcePixel.Update(point.X, point.Y);
targetPixel.Update(point.X, point.Y);
// when read is allowed, retrieves current value (in bytes)
if (CanRead) ReadPixel(sourcePixel);
if (target.CanRead) target.ReadPixel(targetPixel);
// process the pixel by custom user operation
if (isAdvanced)
{
TransformPixelAdvancedFunction transformAdvancedFunction = (TransformPixelAdvancedFunction) transformAction;
allowWrite = transformAdvancedFunction(sourcePixel, targetPixel, this, target);
}
else // use simplified version with pixel parameters only
{
TransformPixelFunction transformFunction = (TransformPixelFunction) transformAction;
allowWrite = transformFunction(sourcePixel, targetPixel);
}
// when write is allowed, copies the value back to the row buffer
if (target.CanWrite && allowWrite) target.WritePixel(targetPixel);
}
};
// transforms image per pixel
ProcessInParallel(path, transformPerPixel, parallelTaskCount);
}
private void TransformPerPixelBase(ImageBuffer target, IList <Point> path, Delegate transformAction, Int32 parallelTaskCount = 4)
{
// checks parameters
Guard.CheckNull(path, "path");
Guard.CheckNull(target, "target");
Guard.CheckNull(transformAction, "transformAction");
// updates the palette
UpdatePalette();
target.UpdatePalette();
// checks the dimensions
if (Width != target.Width || Height != target.Height)
{
const String message = "Both images have to have the same dimensions.";
throw new ArgumentOutOfRangeException(message);
}
// determines mode
Boolean isAdvanced = transformAction is TransformPixelAdvancedFunction;
// process the image in a parallel manner
Action <LineTask> transformPerPixel = lineTask =>
{
// creates individual pixel structures per task
Pixel sourcePixel = new Pixel(this);
Pixel targetPixel = new Pixel(target);
// enumerates the pixels row by row
for (Int32 pathOffset = lineTask.StartOffset; pathOffset < lineTask.EndOffset; pathOffset++)
{
Point point = path[pathOffset];
Boolean allowWrite;
// enumerates the pixel, and returns the control to the outside
sourcePixel.Update(point.X, point.Y);
targetPixel.Update(point.X, point.Y);
// when read is allowed, retrieves current value (in bytes)
if (CanRead)
{
ReadPixel(sourcePixel);
}
if (target.CanRead)
{
target.ReadPixel(targetPixel);
}
// process the pixel by custom user operation
if (isAdvanced)
{
TransformPixelAdvancedFunction transformAdvancedFunction = (TransformPixelAdvancedFunction)transformAction;
allowWrite = transformAdvancedFunction(sourcePixel, targetPixel, this, target);
}
else // use simplified version with pixel parameters only
{
TransformPixelFunction transformFunction = (TransformPixelFunction)transformAction;
allowWrite = transformFunction(sourcePixel, targetPixel);
}
// when write is allowed, copies the value back to the row buffer
if (target.CanWrite && allowWrite)
{
target.WritePixel(targetPixel);
}
}
};
// transforms image per pixel
ProcessInParallel(path, transformPerPixel, parallelTaskCount);
}
