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Ensure Span length of source and destination are equal during pixel conversion #1443

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Merged
merged 6 commits into from
Nov 29, 2020
Merged

Ensure Span length of source and destination are equal during pixel conversion #1443

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cdd041c
Ensure Span length of source and destination are equal during pixel c…
brianpopow Nov 26, 2020
38a0dd1
Merge branch 'master' into bp/bmpEnsureSpanLengthIsEqual
brianpopow Nov 27, 2020
3fba6f8
Slice destination to (0, count)
brianpopow Nov 29, 2020
db8db07
Merge branch 'master' into bp/bmpEnsureSpanLengthIsEqual
brianpopow Nov 29, 2020
82ae5aa
Revert "Slice destination to (0, count)"
brianpopow Nov 29, 2020
7c77e7e
Another attempt using Slice for the destination in PixelOperations co…
brianpopow Nov 29, 2020
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17 changes: 11 additions & 6 deletions src/ImageSharp/Formats/Bmp/BmpEncoderCore.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -262,16 +262,18 @@ private void Write32Bit<TPixel>(Stream stream, Buffer2D<TPixel> pixels)
private void Write24Bit<TPixel>(Stream stream, Buffer2D<TPixel> pixels)
where TPixel : unmanaged, IPixel<TPixel>
{
using (IManagedByteBuffer row = this.AllocateRow(pixels.Width, 3))
int width = pixels.Width;
int rowBytesWithoutPadding = width * 3;
using (IManagedByteBuffer row = this.AllocateRow(width, 3))
{
for (int y = pixels.Height - 1; y >= 0; y--)
{
Span<TPixel> pixelSpan = pixels.GetRowSpan(y);
PixelOperations<TPixel>.Instance.ToBgr24Bytes(
this.configuration,
pixelSpan,
row.GetSpan(),
pixelSpan.Length);
row.Slice(0, rowBytesWithoutPadding),
width);
stream.Write(row.Array, 0, row.Length());
}
}
Expand All @@ -286,7 +288,9 @@ private void Write24Bit<TPixel>(Stream stream, Buffer2D<TPixel> pixels)
private void Write16Bit<TPixel>(Stream stream, Buffer2D<TPixel> pixels)
where TPixel : unmanaged, IPixel<TPixel>
{
using (IManagedByteBuffer row = this.AllocateRow(pixels.Width, 2))
int width = pixels.Width;
int rowBytesWithoutPadding = width * 2;
using (IManagedByteBuffer row = this.AllocateRow(width, 2))
{
for (int y = pixels.Height - 1; y >= 0; y--)
{
Expand All @@ -295,7 +299,7 @@ private void Write16Bit<TPixel>(Stream stream, Buffer2D<TPixel> pixels)
PixelOperations<TPixel>.Instance.ToBgra5551Bytes(
this.configuration,
pixelSpan,
row.GetSpan(),
row.Slice(0, rowBytesWithoutPadding),
pixelSpan.Length);

stream.Write(row.Array, 0, row.Length());
Expand Down Expand Up @@ -341,7 +345,8 @@ private void Write8BitColor<TPixel>(Stream stream, ImageFrame<TPixel> image, Spa
using IndexedImageFrame<TPixel> quantized = frameQuantizer.BuildPaletteAndQuantizeFrame(image, image.Bounds());

ReadOnlySpan<TPixel> quantizedColors = quantized.Palette.Span;
PixelOperations<TPixel>.Instance.ToBgra32(this.configuration, quantizedColors, MemoryMarshal.Cast<byte, Bgra32>(colorPalette));
var quantizedColorBytes = quantizedColors.Length * 4;
PixelOperations<TPixel>.Instance.ToBgra32(this.configuration, quantizedColors, MemoryMarshal.Cast<byte, Bgra32>(colorPalette.Slice(0, quantizedColorBytes)));
Span<uint> colorPaletteAsUInt = MemoryMarshal.Cast<byte, uint>(colorPalette);
for (int i = 0; i < colorPaletteAsUInt.Length; i++)
{
Expand Down