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parallel process images in color space

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This commit is contained in:
BobLd
2023-04-23 18:39:24 +01:00
parent 57ed17e7c4
commit 2c5cb69a64
2 changed files with 99 additions and 11 deletions
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7
src/UglyToad.PdfPig.Tests/Integration/ColorSpaceTests.cs
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@@ -334,11 +334,12 @@
for (int p = 0; p < document.NumberOfPages; p++)
{
var page = document.GetPage(p + 1);
foreach (var image in page.GetImages())
var images = page.GetImages().ToArray();
for (int i = 0; i < images.Length; i++)
{
if (image.TryGetPng(out var png))
if (images[i].TryGetPng(out var png))
{
// TODO
File.WriteAllBytes(Path.Combine(OutputFolder, $"Pig Production Handbook_{p + 1}_{i}.png"), png);
}
}
}

103
src/UglyToad.PdfPig/Graphics/Colors/ColorSpaceDetails.cs
View File

@@ -6,6 +6,7 @@
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Tokens;
using UglyToad.PdfPig.Content;
using UglyToad.PdfPig.Functions;
@@ -535,6 +536,89 @@
/// <inheritdoc/>
internal override IReadOnlyList<byte> Transform(IReadOnlyList<byte> decoded)
{
int outputCount = Process(Enumerable.Repeat(1.0, NumberOfColorComponents).ToArray()).Length;
int outputSize = (int)(decoded.Count * outputCount / (double)NumberOfColorComponents);
var transformed = new byte[outputSize];
Parallel.For(0, decoded.Count / NumberOfColorComponents, i =>
{
double[] comps = new double[NumberOfColorComponents];
for (int n = 0; n < NumberOfColorComponents; n++)
{
comps[n] = decoded[i * NumberOfColorComponents + n] / 255.0;
}
var colors = Process(comps);
for (int c = 0; c < outputCount; c++)
{
transformed[i * outputCount + c] = ConvertToByte(colors[c]);
}
});
return transformed;
}
/*
/// <inheritdoc/>
internal override IReadOnlyList<byte> Transform(IReadOnlyList<byte> decoded)
{
int outputCount = Process(Enumerable.Repeat(1.0, NumberOfColorComponents).ToArray()).Length;
int outputSize = (int)(decoded.Count * outputCount / (double)NumberOfColorComponents);
var transformed = new byte[outputSize];
//Parallel.For(0, )
for (var i = 0; i < decoded.Count / NumberOfColorComponents; i++)
{
double[] comps = new double[NumberOfColorComponents];
for (int n = 0; n < NumberOfColorComponents; n++)
{
comps[n] = decoded[i* NumberOfColorComponents + n] / 255.0;
}
var colors = Process(comps);
for (int c = 0; c < outputCount; c++)
{
transformed[i * outputCount + c] = ConvertToByte(colors[c]);
}
}
return transformed;
}
*/
/*
/// <inheritdoc/>
internal override IReadOnlyList<byte> Transform(IReadOnlyList<byte> decoded)
{
int outputCount = Process(Enumerable.Repeat(1.0, NumberOfColorComponents).ToArray()).Length;
int outputSize = (int)(decoded.Count * outputCount / (double)NumberOfColorComponents);
var transformed = new byte[outputSize];
for (var i = 0; i < decoded.Count; i += NumberOfColorComponents)
{
double[] comps = new double[NumberOfColorComponents];
for (int n = 0; n < NumberOfColorComponents; n++)
{
comps[n] = decoded[i + n] / 255.0;
}
var colors = Process(comps);
for (int c = 0; c < outputCount; c++)
{
transformed[(i / NumberOfColorComponents) * outputCount + c] = ConvertToByte(colors[c]);
}
}
return transformed;
}
*/
/*
/// <inheritdoc/>
internal override IReadOnlyList<byte> Transform(IReadOnlyList<byte> decoded)
{
int outputCount = Process(Enumerable.Repeat(1.0, NumberOfColorComponents).ToArray()).Length;
var transformed = new List<byte>();
for (var i = 0; i < decoded.Count; i += NumberOfColorComponents)
{
@@ -545,7 +629,7 @@
}
var colors = Process(comps);
for (int c = 0; c < colors.Length; c++)
for (int c = 0; c < outputCount; c++)
{
transformed.Add(ConvertToByte(colors[c]));
}
@@ -553,6 +637,7 @@
return transformed;
}
*/
/// <inheritdoc/>
public override IColor GetInitializeColor()
@@ -1348,22 +1433,24 @@
{
if (Profile != null)
{
var transformed = new List<byte>();
for (var i = 0; i < decoded.Count; i += NumberOfColorComponents)
int outputCount = Process(Enumerable.Repeat(1.0, NumberOfColorComponents).ToArray()).Length;
int outputSize = (int)(decoded.Count * outputCount / (double)NumberOfColorComponents);
var transformed = new byte[outputSize];
Parallel.For(0, decoded.Count / NumberOfColorComponents, i =>
{
double[] comps = new double[NumberOfColorComponents];
for (int n = 0; n < NumberOfColorComponents; n++)
{
comps[n] = decoded[i + n] / 255.0;
comps[n] = decoded[i * NumberOfColorComponents + n] / 255.0;
}
var colors = Process(comps);
for (int c = 0; c < colors.Length; c++)
for (int c = 0; c < outputCount; c++)
{
transformed.Add(ConvertToByte(colors[c]));
transformed[i * outputCount + c] = ConvertToByte(colors[c]);
}
}
});
return transformed;
}