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Simplify CriticalCopyPixels in BitmapSource by removing duplicate type checks #9395

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Merged
merged 1 commit into from
Feb 28, 2025
Merged

Simplify CriticalCopyPixels in BitmapSource by removing duplicate type checks #9395

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47 changes: 9 additions & 38 deletions src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Media/Imaging/BitmapSource.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,10 +2,11 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System.Windows.Media.Composition;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.IO;
using MS.Internal;
using System.Runtime.InteropServices;
using System.Windows.Media.Composition;
using MS.Win32;

using UnsafeNativeMethods = MS.Win32.PresentationCore.UnsafeNativeMethods;
Expand Down Expand Up @@ -663,43 +664,13 @@ unsafe internal void CriticalCopyPixels(Int32Rect sourceRect, Array pixels, int

int destBufferSize = checked(elementSize * (pixels.Length - offset));

// Check whether offset is out of bounds manually
if (offset >= pixels.Length)
throw new IndexOutOfRangeException();

if (pixels is byte[])
{
fixed (void* pixelArray = &((byte[])pixels)[offset])
CriticalCopyPixels(sourceRect, (IntPtr)pixelArray, destBufferSize, stride);
}
else if (pixels is short[])
{
fixed (void* pixelArray = &((short[])pixels)[offset])
CriticalCopyPixels(sourceRect, (IntPtr)pixelArray, destBufferSize, stride);
}
else if (pixels is ushort[])
{
fixed (void* pixelArray = &((ushort[])pixels)[offset])
CriticalCopyPixels(sourceRect, (IntPtr)pixelArray, destBufferSize, stride);
}
else if (pixels is int[])
{
fixed (void* pixelArray = &((int[])pixels)[offset])
CriticalCopyPixels(sourceRect, (IntPtr)pixelArray, destBufferSize, stride);
}
else if (pixels is uint[])
{
fixed (void* pixelArray = &((uint[])pixels)[offset])
CriticalCopyPixels(sourceRect, (IntPtr)pixelArray, destBufferSize, stride);
}
else if (pixels is float[])
{
fixed (void* pixelArray = &((float[])pixels)[offset])
CriticalCopyPixels(sourceRect, (IntPtr)pixelArray, destBufferSize, stride);
}
else if (pixels is double[])
{
fixed (void* pixelArray = &((double[])pixels)[offset])
CriticalCopyPixels(sourceRect, (IntPtr)pixelArray, destBufferSize, stride);
}
}
fixed (byte* pixelArray = &Unsafe.AddByteOffset(ref MemoryMarshal.GetArrayDataReference(pixels), (nint)offset * elementSize))
CriticalCopyPixels(sourceRect, (nint)pixelArray, destBufferSize, stride);
}

/// <summary>
/// CriticalCopyPixels
Expand Down