internal static unsafe Bitmap To32bppArgbSystemDrawingBitmap <TPixel>(Image <TPixel> image)
where TPixel : struct, IPixel <TPixel>
{
int w = image.Width;
int h = image.Height;
var resultBitmap = new Bitmap(w, h, PixelFormat.Format32bppArgb);
var fullRect = new Rectangle(0, 0, w, h);
BitmapData data = resultBitmap.LockBits(fullRect, ImageLockMode.ReadWrite, resultBitmap.PixelFormat);
byte * destPtrBase = (byte *)data.Scan0;
long destRowByteCount = data.Stride;
long sourceRowByteCount = w * sizeof(Bgra32);
using (IMemoryOwner <Bgra32> workBuffer = image.GetConfiguration().MemoryAllocator.Allocate <Bgra32>(w))
{
fixed(Bgra32 *sourcePtr = &workBuffer.GetReference())
{
for (int y = 0; y < h; y++)
{
Span <TPixel> row = image.Frames.RootFrame.GetPixelRowSpan(y);
PixelOperations <TPixel> .Instance.ToBgra32(row, workBuffer.GetSpan(), row.Length);
byte *destPtr = destPtrBase + (data.Stride * y);
Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
}
}
}
resultBitmap.UnlockBits(data);
return(resultBitmap);
}
/// <inheritdoc/>
protected override void OnFrameApply(ImageFrame <TPixel> source)
{
int brushSize = this.definition.BrushSize;
if (brushSize <= 0 || brushSize > source.Height || brushSize > source.Width)
{
throw new ArgumentOutOfRangeException(nameof(brushSize));
}
int startY = this.SourceRectangle.Y;
int endY = this.SourceRectangle.Bottom;
int startX = this.SourceRectangle.X;
int endX = this.SourceRectangle.Right;
int maxY = endY - 1;
int maxX = endX - 1;
int radius = brushSize >> 1;
int levels = this.definition.Levels;
int rowWidth = source.Width;
int rectangleWidth = this.SourceRectangle.Width;
Configuration configuration = this.Configuration;
using Buffer2D <TPixel> targetPixels = this.Configuration.MemoryAllocator.Allocate2D <TPixel>(source.Size());
source.CopyTo(targetPixels);
var workingRect = Rectangle.FromLTRB(startX, startY, endX, endY);
ParallelHelper.IterateRows(
workingRect,
this.Configuration,
(rows) =>
{
/* Allocate the two temporary Vector4 buffers, one for the source row and one for the target row.
* The ParallelHelper.IterateRowsWithTempBuffers overload is not used in this case because
* the two allocated buffers have a length equal to the width of the source image,
* and not just equal to the width of the target rectangle to process.
* Furthermore, there are two buffers being allocated in this case, so using that overload would
* have still required the explicit allocation of the secondary buffer.
* Similarly, one temporary float buffer is also allocated from the pool, and that is used
* to create the target bins for all the color channels being processed.
* This buffer is only rented once outside of the main processing loop, and its contents
* are cleared for each loop iteration, to avoid the repeated allocation for each processed pixel. */
using (IMemoryOwner <Vector4> sourceRowBuffer = configuration.MemoryAllocator.Allocate <Vector4>(rowWidth))
using (IMemoryOwner <Vector4> targetRowBuffer = configuration.MemoryAllocator.Allocate <Vector4>(rowWidth))
using (IMemoryOwner <float> bins = configuration.MemoryAllocator.Allocate <float>(levels * 4))
{
Span <Vector4> sourceRowVector4Span = sourceRowBuffer.Memory.Span;
Span <Vector4> sourceRowAreaVector4Span = sourceRowVector4Span.Slice(startX, rectangleWidth);
Span <Vector4> targetRowVector4Span = targetRowBuffer.Memory.Span;
Span <Vector4> targetRowAreaVector4Span = targetRowVector4Span.Slice(startX, rectangleWidth);
ref float binsRef = ref bins.GetReference();
ref int intensityBinRef = ref Unsafe.As <float, int>(ref binsRef);
ref float redBinRef = ref Unsafe.Add(ref binsRef, levels);
/// <summary>
/// Returns an image from the given System.Drawing bitmap.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="bmp">The input bitmap.</param>
/// <exception cref="ArgumentException">Thrown if the image pixel format is not of type <see cref="PixelFormat.Format32bppArgb"/></exception>
internal static unsafe Image <TPixel> From32bppArgbSystemDrawingBitmap <TPixel>(Bitmap bmp)
where TPixel : unmanaged, IPixel <TPixel>
{
int w = bmp.Width;
int h = bmp.Height;
var fullRect = new System.Drawing.Rectangle(0, 0, w, h);
if (bmp.PixelFormat != PixelFormat.Format32bppArgb)
{
throw new ArgumentException(
$"{nameof(From32bppArgbSystemDrawingBitmap)} : pixel format should be {PixelFormat.Format32bppArgb}!",
nameof(bmp));
}
BitmapData data = bmp.LockBits(fullRect, ImageLockMode.ReadWrite, bmp.PixelFormat);
var image = new Image <TPixel>(w, h);
try
{
byte *sourcePtrBase = (byte *)data.Scan0;
long sourceRowByteCount = data.Stride;
long destRowByteCount = w * sizeof(Bgra32);
Configuration configuration = image.GetConfiguration();
using (IMemoryOwner <Bgra32> workBuffer = Configuration.Default.MemoryAllocator.Allocate <Bgra32>(w))
{
fixed(Bgra32 *destPtr = &workBuffer.GetReference())
{
for (int y = 0; y < h; y++)
{
Span <TPixel> row = image.Frames.RootFrame.GetPixelRowSpan(y);
byte *sourcePtr = sourcePtrBase + (data.Stride * y);
Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
PixelOperations <TPixel> .Instance.FromBgra32(
configuration,
workBuffer.GetSpan().Slice(0, w),
row);
}
}
}
}
finally
{
bmp.UnlockBits(data);
}
return(image);
}
internal static unsafe Bitmap To32bppArgbSystemDrawingBitmap <TPixel>(Image <TPixel> image)
where TPixel : unmanaged, IPixel <TPixel>
{
Configuration configuration = image.GetConfiguration();
int w = image.Width;
int h = image.Height;
var resultBitmap = new Bitmap(w, h, PixelFormat.Format32bppArgb);
var fullRect = new System.Drawing.Rectangle(0, 0, w, h);
BitmapData data = resultBitmap.LockBits(fullRect, ImageLockMode.ReadWrite, resultBitmap.PixelFormat);
try
{
byte *destPtrBase = (byte *)data.Scan0;
long destRowByteCount = data.Stride;
long sourceRowByteCount = w * sizeof(Bgra32);
image.ProcessPixelRows(accessor =>
{
using IMemoryOwner <Bgra32> workBuffer = image.GetConfiguration().MemoryAllocator.Allocate <Bgra32>(w);
fixed(Bgra32 * sourcePtr = &workBuffer.GetReference())
{
for (int y = 0; y < h; y++)
{
Span <TPixel> row = accessor.GetRowSpan(y);
PixelOperations <TPixel> .Instance.ToBgra32(configuration, row, workBuffer.GetSpan());
byte *destPtr = destPtrBase + (data.Stride * y);
Buffer.MemoryCopy(sourcePtr, destPtr, destRowByteCount, sourceRowByteCount);
}
}
});
}
finally
{
resultBitmap.UnlockBits(data);
}
return(resultBitmap);
}
