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Reduced allocations on image-conversion if the source iamge is already in the correct color-format

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DarthAffe committed 2024-08-11 20:22:03 +02:00
1 parent b66fc3c9e9
commit ca4e7e7af5
2 files changed
+8 -7
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HPPH.System.Drawing/ImageExtension.cs
+4 -4
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@@ -18,10 +18,10 @@ public static class ImageExtension
Bitmap bitmap = new(image.Width, image.Height, PixelFormat.Format24bppRgb);
BitmapData bmpData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.WriteOnly, bitmap.PixelFormat);
IImage<ColorBGR> convertedImage = image.ConvertTo<ColorBGR>();
IImage<ColorBGR> img = image as IImage<ColorBGR> ?? image.ConvertTo<ColorBGR>();
nint ptr = bmpData.Scan0;
foreach (ImageRow<ColorBGR> row in convertedImage.Rows)
foreach (ImageRow<ColorBGR> row in img.Rows)
{
row.CopyTo(new Span<byte>((void*)ptr, bmpData.Stride));
ptr += bmpData.Stride;
@@ -37,10 +37,10 @@ public static class ImageExtension
Bitmap bitmap = new(image.Width, image.Height, PixelFormat.Format32bppArgb);
BitmapData bmpData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.WriteOnly, bitmap.PixelFormat);
IImage<ColorBGRA> convertedImage = image.ConvertTo<ColorBGRA>();
IImage<ColorBGRA> img = image as IImage<ColorBGRA> ?? image.ConvertTo<ColorBGRA>();
nint ptr = bmpData.Scan0;
foreach (ImageRow<ColorBGRA> row in convertedImage.Rows)
foreach (ImageRow<ColorBGRA> row in img.Rows)
{
row.CopyTo(new Span<byte>((void*)ptr, bmpData.Stride));
ptr += bmpData.Stride;