tsai
/
ImageSharp
mirror of https://github.com/SixLabors/ImageSharp
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

Update PngScanlineProcessor.cs

af/merge-core
James Jackson-South 6 years ago
parent
60fed0c244
commit
f1a67b5e34
1 changed files with 12 additions and 49 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 61
      src/ImageSharp/Formats/Png/PngScanlineProcessor.cs

61
src/ImageSharp/Formats/Png/PngScanlineProcessor.cs
View File

@ -55,32 +55,24 @@ namespace SixLabors.ImageSharp.Formats.Png
if (header.BitDepth == 16)
{
Rgba64 rgba64 = default;
for (int x = 0, o = 0; x < header.Width; x++, o += 2)
{
ushort luminance = BinaryPrimitives.ReadUInt16BigEndian(scanlineSpan.Slice(o, 2));
rgba64.R = luminance;
rgba64.G = luminance;
rgba64.B = luminance;
rgba64.A = luminance.Equals(luminance16Trans.PackedValue) ? ushort.MinValue : ushort.MaxValue;
ushort alpha = luminance.Equals(luminance16Trans.PackedValue) ? ushort.MinValue : ushort.MaxValue;
pixel.FromRgba64(rgba64);
pixel.FromLa32(new La32(luminance, alpha));
Unsafe.Add(ref rowSpanRef, x) = pixel;
}
}
else
{
byte scaledLuminanceTrans = (byte)(luminanceTrans.PackedValue * scaleFactor);
Rgba32 rgba32 = default;
for (int x = 0; x < header.Width; x++)
{
byte luminance = (byte)(Unsafe.Add(ref scanlineSpanRef, x) * scaleFactor);
rgba32.R = luminance;
rgba32.G = luminance;
rgba32.B = luminance;
rgba32.A = luminance.Equals(scaledLuminanceTrans) ? byte.MinValue : byte.MaxValue;
byte alpha = luminance.Equals(scaledLuminanceTrans) ? byte.MinValue : byte.MaxValue;
pixel.FromRgba32(rgba32);
pixel.FromLa16(new La16(luminance, alpha));
Unsafe.Add(ref rowSpanRef, x) = pixel;
}
}
@ -128,32 +120,24 @@ namespace SixLabors.ImageSharp.Formats.Png
if (header.BitDepth == 16)
{
Rgba64 rgba64 = default;
for (int x = pixelOffset, o = 0; x < header.Width; x += increment, o += 2)
{
ushort luminance = BinaryPrimitives.ReadUInt16BigEndian(scanlineSpan.Slice(o, 2));
rgba64.R = luminance;
rgba64.G = luminance;
rgba64.B = luminance;
rgba64.A = luminance.Equals(luminance16Trans.PackedValue) ? ushort.MinValue : ushort.MaxValue;
ushort alpha = luminance.Equals(luminance16Trans.PackedValue) ? ushort.MinValue : ushort.MaxValue;
pixel.FromRgba64(rgba64);
pixel.FromLa32(new La32(luminance, alpha));
Unsafe.Add(ref rowSpanRef, x) = pixel;
}
}
else
{
byte scaledLuminanceTrans = (byte)(luminanceTrans.PackedValue * scaleFactor);
Rgba32 rgba32 = default;
for (int x = pixelOffset, o = 0; x < header.Width; x += increment, o++)
{
byte luminance = (byte)(Unsafe.Add(ref scanlineSpanRef, o) * scaleFactor);
rgba32.R = luminance;
rgba32.G = luminance;
rgba32.B = luminance;
rgba32.A = luminance.Equals(scaledLuminanceTrans) ? byte.MinValue : byte.MaxValue;
byte alpha = luminance.Equals(scaledLuminanceTrans) ? byte.MinValue : byte.MaxValue;
pixel.FromRgba32(rgba32);
pixel.FromLa16(new La16(luminance, alpha));
Unsafe.Add(ref rowSpanRef, x) = pixel;
}
}
@ -173,35 +157,24 @@ namespace SixLabors.ImageSharp.Formats.Png
if (header.BitDepth == 16)
{
Rgba64 rgba64 = default;
for (int x = 0, o = 0; x < header.Width; x++, o += 4)
{
ushort luminance = BinaryPrimitives.ReadUInt16BigEndian(scanlineSpan.Slice(o, 2));
ushort alpha = BinaryPrimitives.ReadUInt16BigEndian(scanlineSpan.Slice(o + 2, 2));
rgba64.R = luminance;
rgba64.G = luminance;
rgba64.B = luminance;
rgba64.A = alpha;
pixel.FromRgba64(rgba64);
pixel.FromLa32(new La32(luminance, alpha));
Unsafe.Add(ref rowSpanRef, x) = pixel;
}
}
else
{
Rgba32 rgba32 = default;
for (int x = 0; x < header.Width; x++)
{
int offset = x * bytesPerPixel;
byte luminance = Unsafe.Add(ref scanlineSpanRef, offset);
byte alpha = Unsafe.Add(ref scanlineSpanRef, offset + bytesPerSample);
rgba32.R = luminance;
rgba32.G = luminance;
rgba32.B = luminance;
rgba32.A = alpha;
pixel.FromRgba32(rgba32);
pixel.FromLa16(new La16(luminance, alpha));
Unsafe.Add(ref rowSpanRef, x) = pixel;
}
}
@ -223,34 +196,24 @@ namespace SixLabors.ImageSharp.Formats.Png
if (header.BitDepth == 16)
{
Rgba64 rgba64 = default;
for (int x = pixelOffset, o = 0; x < header.Width; x += increment, o += 4)
{
ushort luminance = BinaryPrimitives.ReadUInt16BigEndian(scanlineSpan.Slice(o, 2));
ushort alpha = BinaryPrimitives.ReadUInt16BigEndian(scanlineSpan.Slice(o + 2, 2));
rgba64.R = luminance;
rgba64.G = luminance;
rgba64.B = luminance;
rgba64.A = alpha;
pixel.FromRgba64(rgba64);
pixel.FromLa32(new La32(luminance, alpha));
Unsafe.Add(ref rowSpanRef, x) = pixel;
}
}
else
{
Rgba32 rgba32 = default;
int offset = 0;
for (int x = pixelOffset; x < header.Width; x += increment)
{
byte luminance = Unsafe.Add(ref scanlineSpanRef, offset);
byte alpha = Unsafe.Add(ref scanlineSpanRef, offset + bytesPerSample);
rgba32.R = luminance;
rgba32.G = luminance;
rgba32.B = luminance;
rgba32.A = alpha;
pixel.FromRgba32(rgba32);
pixel.FromLa16(new La16(luminance, alpha));
Unsafe.Add(ref rowSpanRef, x) = pixel;
offset += bytesPerPixel;
}

Write Preview
Loading…
Cancel
Save