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

Get rid of CreatePooled and ReturnPooled methods in JpegPixelArea to separate memory management.

pull/210/head
Mykhailo Matviiv 9 years ago
parent
7bead7bc90
commit
c97cbb6cd6
4 changed files with 43 additions and 55 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. 34
      src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegPixelArea.cs
  2. 18
      src/ImageSharp/Formats/Jpeg/Components/Decoder/YCbCrImage.cs
  3. 40
      src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
  4. 6
      tests/ImageSharp.Tests/Formats/Jpg/YCbCrImageTests.cs

34
src/ImageSharp/Formats/Jpeg/Components/Decoder/JpegPixelArea.cs
View File

@ -24,6 +24,16 @@ namespace ImageSharp.Formats.Jpg
this.Offset = offset;
}
/// <summary>
/// Initializes a new instance of the <see cref="JpegPixelArea" /> struct from existing buffer.
/// <see cref="Stride"/> will be set to <see cref="Buffer2D{T}.Width"/> of <paramref name="pixels"/> and <see cref="Offset"/> will be set to 0.
/// </summary>
/// <param name="pixels">The pixel buffer</param>
public JpegPixelArea(Buffer2D<byte> pixels)
: this(pixels, pixels.Width, 0)
{
}
/// <summary>
/// Gets the pixels buffer.
/// </summary>
@ -64,30 +74,6 @@ namespace ImageSharp.Formats.Jpg
}
}
/// <summary>
/// Creates a new instance of the <see cref="JpegPixelArea" /> struct.
/// Pixel array will be handled by <see cref="Buffer2D{T}"/>, but
/// <see cref="ReturnPooled" /> can be called when the instance is no longer needed.
/// </summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <returns>A <see cref="JpegPixelArea" /> with pooled data</returns>
public static JpegPixelArea CreatePooled(int width, int height) => new JpegPixelArea(Buffer2D<byte>.CreateClean(width, height), width, 0);
/// <summary>
/// Dispose <see cref="Pixels" />.
/// </summary>
public void ReturnPooled()
{
if (this.Pixels == null)
{
return;
}
this.Pixels.Dispose();
this.Pixels = null;
}
/// <summary>
/// Gets the subarea that belongs to the Block8x8 defined by block indices
/// </summary>

18
src/ImageSharp/Formats/Jpeg/Components/Decoder/YCbCrImage.cs
View File

@ -17,17 +17,17 @@ namespace ImageSharp.Formats.Jpg
/// <summary>
/// Gets the luminance components channel as <see cref="JpegPixelArea" />.
/// </summary>
public JpegPixelArea YChannel;
public Buffer2D<byte> YChannel;
/// <summary>
/// Gets the blue chroma components channel as <see cref="JpegPixelArea" />.
/// </summary>
public JpegPixelArea CbChannel;
public Buffer2D<byte> CbChannel;
/// <summary>
/// Gets an offseted <see cref="JpegPixelArea" /> to the Cr channel
/// </summary>
public JpegPixelArea CrChannel;
public Buffer2D<byte> CrChannel;
#pragma warning restore SA1401
/// <summary>
@ -44,9 +44,9 @@ namespace ImageSharp.Formats.Jpg
this.YStride = width;
this.CStride = cSize.Width;
this.YChannel = JpegPixelArea.CreatePooled(width, height);
this.CbChannel = JpegPixelArea.CreatePooled(cSize.Width, cSize.Height);
this.CrChannel = JpegPixelArea.CreatePooled(cSize.Width, cSize.Height);
this.YChannel = Buffer2D<byte>.CreateClean(width, height);
this.CbChannel = Buffer2D<byte>.CreateClean(cSize.Width, cSize.Height);
this.CrChannel = Buffer2D<byte>.CreateClean(cSize.Width, cSize.Height);
}
/// <summary>
@ -106,9 +106,9 @@ namespace ImageSharp.Formats.Jpg
/// </summary>
public void Dispose()
{
this.YChannel.ReturnPooled();
this.CbChannel.ReturnPooled();
this.CrChannel.ReturnPooled();
this.YChannel.Dispose();
this.CbChannel.Dispose();
this.CrChannel.Dispose();
}
/// <summary>

40
src/ImageSharp/Formats/Jpeg/JpegDecoderCore.cs
View File

@ -223,8 +223,8 @@ namespace ImageSharp.Formats
this.ycbcrImage?.Dispose();
this.InputProcessor.Dispose();
this.grayImage.ReturnPooled();
this.blackImage.ReturnPooled();
this.grayImage.Pixels?.Dispose();
this.blackImage.Pixels?.Dispose();
}
/// <summary>
@ -243,11 +243,11 @@ namespace ImageSharp.Formats
switch (compIndex)
{
case 0:
return this.ycbcrImage.YChannel;
return new JpegPixelArea(this.ycbcrImage.YChannel);
case 1:
return this.ycbcrImage.CbChannel;
return new JpegPixelArea(this.ycbcrImage.CbChannel);
case 2:
return this.ycbcrImage.CrChannel;
return new JpegPixelArea(this.ycbcrImage.CrChannel);
case 3:
return this.blackImage;
default:
@ -586,9 +586,9 @@ namespace ImageSharp.Formats
for (int x = 0; x < image.Width; x++)
{
byte cyan = this.ycbcrImage.YChannel.Pixels[yo + x];
byte magenta = this.ycbcrImage.CbChannel.Pixels[co + (x / scale)];
byte yellow = this.ycbcrImage.CrChannel.Pixels[co + (x / scale)];
byte cyan = this.ycbcrImage.YChannel[yo + x];
byte magenta = this.ycbcrImage.CbChannel[co + (x / scale)];
byte yellow = this.ycbcrImage.CrChannel[co + (x / scale)];
TPixel packed = default(TPixel);
this.PackCmyk(ref packed, cyan, magenta, yellow, x, y);
@ -655,9 +655,9 @@ namespace ImageSharp.Formats
for (int x = 0; x < image.Width; x++)
{
byte red = this.ycbcrImage.YChannel.Pixels[yo + x];
byte green = this.ycbcrImage.CbChannel.Pixels[co + (x / scale)];
byte blue = this.ycbcrImage.CrChannel.Pixels[co + (x / scale)];
byte red = this.ycbcrImage.YChannel[yo + x];
byte green = this.ycbcrImage.CbChannel[co + (x / scale)];
byte blue = this.ycbcrImage.CrChannel[co + (x / scale)];
TPixel packed = default(TPixel);
packed.PackFromBytes(red, green, blue, 255);
@ -687,9 +687,9 @@ namespace ImageSharp.Formats
y =>
{
// TODO. This Parallel loop doesn't give us the boost it should.
ref byte ycRef = ref this.ycbcrImage.YChannel.Pixels[0];
ref byte cbRef = ref this.ycbcrImage.CbChannel.Pixels[0];
ref byte crRef = ref this.ycbcrImage.CrChannel.Pixels[0];
ref byte ycRef = ref this.ycbcrImage.YChannel[0];
ref byte cbRef = ref this.ycbcrImage.CbChannel[0];
ref byte crRef = ref this.ycbcrImage.CrChannel[0];
fixed (YCbCrToRgbTables* tables = &yCbCrToRgbTables)
{
// TODO: Simplify + optimize + share duplicate code across converter methods
@ -737,9 +737,9 @@ namespace ImageSharp.Formats
for (int x = 0; x < image.Width; x++)
{
byte yy = this.ycbcrImage.YChannel.Pixels[yo + x];
byte cb = this.ycbcrImage.CbChannel.Pixels[co + (x / scale)];
byte cr = this.ycbcrImage.CrChannel.Pixels[co + (x / scale)];
byte yy = this.ycbcrImage.YChannel[yo + x];
byte cb = this.ycbcrImage.CbChannel[co + (x / scale)];
byte cr = this.ycbcrImage.CrChannel[co + (x / scale)];
TPixel packed = default(TPixel);
this.PackYcck(ref packed, yy, cb, cr, x, y);
@ -787,7 +787,8 @@ namespace ImageSharp.Formats
if (this.ComponentCount == 1)
{
this.grayImage = JpegPixelArea.CreatePooled(8 * this.MCUCountX, 8 * this.MCUCountY);
Buffer2D<byte> buffer = Buffer2D<byte>.CreateClean(8 * this.MCUCountX, 8 * this.MCUCountY);
this.grayImage = new JpegPixelArea(buffer);
}
else
{
@ -826,7 +827,8 @@ namespace ImageSharp.Formats
int h3 = this.ComponentArray[3].HorizontalFactor;
int v3 = this.ComponentArray[3].VerticalFactor;
this.blackImage = JpegPixelArea.CreatePooled(8 * h3 * this.MCUCountX, 8 * v3 * this.MCUCountY);
Buffer2D<byte> buffer = Buffer2D<byte>.CreateClean(8 * h3 * this.MCUCountX, 8 * v3 * this.MCUCountY);
this.blackImage = new JpegPixelArea(buffer);
}
}
}

6
tests/ImageSharp.Tests/Formats/Jpg/YCbCrImageTests.cs
View File

@ -61,9 +61,9 @@ namespace ImageSharp.Tests
//this.PrintChannel("Cb", img.CbChannel);
//this.PrintChannel("Cr", img.CrChannel);
Assert.Equal(img.YChannel.Stride, 400);
Assert.Equal(img.CbChannel.Stride, 400 / expectedCStrideDiv);
Assert.Equal(img.CrChannel.Stride, 400 / expectedCStrideDiv);
Assert.Equal(img.YChannel.Width, 400);
Assert.Equal(img.CbChannel.Width, 400 / expectedCStrideDiv);
Assert.Equal(img.CrChannel.Width, 400 / expectedCStrideDiv);
}
}

Write Preview
Loading…
Cancel
Save