@ -22,6 +22,30 @@ namespace ImageProcessor.Imaging
/// </summary>
/// </summary>
public unsafe class FastBitmap : IDisposable public unsafe class FastBitmap : IDisposable
{ {
/// <summary>
/// The integral representation of the 8bppIndexed pixel format.
/// </summary>
// ReSharper disable once InconsistentNaming
private const int Format8bppIndexed = ( int ) PixelFormat . Format8bppIndexed ;
/// <summary>
/// The integral representation of the 24bppRgb pixel format.
/// </summary>
// ReSharper disable once InconsistentNaming
private const int Format24bppRgb = ( int ) PixelFormat . Format24bppRgb ;
/// <summary>
/// The integral representation of the 32bppArgb pixel format.
/// </summary>
// ReSharper disable once InconsistentNaming
private const int Format32bppArgb = ( int ) PixelFormat . Format32bppArgb ;
/// <summary>
/// The integral representation of the 32bppPArgb pixel format.
/// </summary>
// ReSharper disable once InconsistentNaming
private const int Format32bppPArgb = ( int ) PixelFormat . Format32bppPArgb ;
/// <summary>
/// <summary>
/// The bitmap.
/// The bitmap.
/// </summary>
/// </summary>
@ -37,11 +61,6 @@ namespace ImageProcessor.Imaging
/// </summary>
/// </summary>
private readonly int height ; private readonly int height ;
/// <summary>
/// The size of the a single pixel.
/// </summary>
private readonly int pixelSize ;
/// <summary>
/// <summary>
/// The color channel - blue, green, red, alpha.
/// The color channel - blue, green, red, alpha.
/// </summary>
/// </summary>
@ -55,27 +74,27 @@ namespace ImageProcessor.Imaging
/// <summary>
/// <summary>
/// The normal integral image.
/// The normal integral image.
/// </summary>
/// </summary>
private readonly long [ , ] normalSumImage ; private long [ , ] normalSumImage ;
/// <summary>
/// <summary>
/// The squared integral image.
/// The squared integral image.
/// </summary>
/// </summary>
private readonly long [ , ] squaredSumImage ; private long [ , ] squaredSumImage ;
/// <summary>
/// <summary>
/// The tilted sum image.
/// The tilted sum image.
/// </summary>
/// </summary>
private readonly long [ , ] tiltedSumImage ; private long [ , ] tiltedSumImage ;
/// <summary>
/// <summary>
/// The normal width.
/// The normal width.
/// </summary>
/// </summary>
private readonly int normalWidth ; private int normalWidth ;
/// <summary>
/// <summary>
/// The tilted width.
/// The tilted width.
/// </summary>
/// </summary>
private readonly int tiltedWidth ; private int tiltedWidth ;
/// <summary>
/// <summary>
/// The number of bytes in a row.
/// The number of bytes in a row.
@ -112,6 +131,11 @@ namespace ImageProcessor.Imaging
/// </summary>
/// </summary>
private GCHandle tiltedSumHandle ; private GCHandle tiltedSumHandle ;
/// <summary>
/// The size of the color32 structure.
/// </summary>
private int pixelSize ;
/// <summary>
/// <summary>
/// The bitmap data.
/// The bitmap data.
/// </summary>
/// </summary>
@ -153,46 +177,25 @@ namespace ImageProcessor.Imaging
/// </param>
/// </param>
public FastBitmap ( Image bitmap , bool computeTilted ) public FastBitmap ( Image bitmap , bool computeTilted )
{ {
int pixelFormat = ( int ) bitmap . PixelFormat ;
// Check image format
// Check image format
if ( ! ( bitmap . PixelFormat = = PixelFormat . Format8bppIndexed | | if ( ! ( pixelFormat = = Format8bppIndexed | |
bitmap . P ixelFormat= = PixelFormat . Format24bppRgb | | p ixelFormat = = Format24bppRgb | |
bitmap . P ixelFormat= = PixelFormat . Format32bppArgb | | p ixelFormat = = Format32bppArgb | |
bitmap . P ixelFormat= = PixelFormat . Format32bppPArgb ) ) p ixelFormat = = Format32bppPArgb ) )
{ {
throw new ArgumentException ( "Only 8bpp, 24bpp and 32bpp images are supported." ) ; throw new ArgumentException ( "Only 8bpp, 24bpp and 32bpp images are supported." ) ;
} }
this . pixelSize = Image . GetPixelFormatSize ( bitmap . PixelFormat ) / 8 ;
this . bitmap = ( Bitmap ) bitmap ; this . bitmap = ( Bitmap ) bitmap ;
this . width = this . bitmap . Width ; this . width = this . bitmap . Width ;
this . height = this . bitmap . Height ; this . height = this . bitmap . Height ;
this . channel = this . bitmap . PixelFormat = = PixelFormat . Format8bppIndexed ? 0 : 2 ;
this . computeTilted = computeTilted ;
this . normalWidth = this . width + 1 ;
int normalHeight = this . height + 1 ;
this . tiltedWidth = this . width + 2 ;
int tiltedHeight = this . height + 2 ;
this . normalSumImage = new long [ normalHeight , this . normalWidth ] ;
this . normalSumHandle = GCHandle . Alloc ( this . normalSumImage , GCHandleType . Pinned ) ;
this . normalSum = ( long * ) this . normalSumHandle . AddrOfPinnedObject ( ) . ToPointer ( ) ;
this . squaredSumImage = new long [ normalHeight , this . normalWidth ] ; this . channel = pixelFormat = = Format8bppIndexed ? 0 : 2 ;
this . squaredSumHandle = GCHandle . Alloc ( this . squaredSumImage , GCHandleType . Pinned ) ; this . computeTilted = computeTilted ;
this . squaredSum = ( long * ) this . squaredSumHandle . AddrOfPinnedObject ( ) . ToPointer ( ) ;
if ( this . computeTilted )
{
this . tiltedSumImage = new long [ tiltedHeight , this . tiltedWidth ] ;
this . tiltedSumHandle = GCHandle . Alloc ( this . tiltedSumImage , GCHandleType . Pinned ) ;
this . tiltedSum = ( long * ) this . tiltedSumHandle . AddrOfPinnedObject ( ) . ToPointer ( ) ;
}
this . LockBitmap ( ) ; this . LockBitmap ( ) ;
this . CalculateIntegrals ( ) ;
} }
/// <summary>
/// <summary>
@ -260,13 +263,13 @@ namespace ImageProcessor.Imaging
/// <summary>
/// <summary>
/// Allows the implicit conversion of an instance of <see cref="FastBitmap"/> to a
/// Allows the implicit conversion of an instance of <see cref="FastBitmap"/> to a
/// <see cref="Image"/>.
/// <see cref="System.Drawing. Image"/>.
/// </summary>
/// </summary>
/// <param name="fastBitmap">
/// <param name="fastBitmap">
/// The instance of <see cref="FastBitmap"/> to convert.
/// The instance of <see cref="FastBitmap"/> to convert.
/// </param>
/// </param>
/// <returns>
/// <returns>
/// An instance of <see cref="Image"/>.
/// An instance of <see cref="System.Drawing. Image"/>.
/// </returns>
/// </returns>
public static implicit operator Image ( FastBitmap fastBitmap ) public static implicit operator Image ( FastBitmap fastBitmap )
{ {
@ -308,14 +311,7 @@ namespace ImageProcessor.Imaging
} }
#endif
#endif
Color32 * data = this [ x , y ] ; Color32 * data = this [ x , y ] ;
return Color . FromArgb ( data - > A , data - > R , data - > G , data - > B ) ;
if ( this . bitmap . PixelFormat = = PixelFormat . Format32bppArgb | |
this . bitmap . PixelFormat = = PixelFormat . Format32bppPArgb )
{
return Color . FromArgb ( data - > A , data - > R , data - > G , data - > B ) ;
}
return Color . FromArgb ( data - > R , data - > G , data - > B ) ;
} }
/// <summary>
/// <summary>
@ -344,12 +340,7 @@ namespace ImageProcessor.Imaging
data - > R = color . R ; data - > R = color . R ;
data - > G = color . G ; data - > G = color . G ;
data - > B = color . B ; data - > B = color . B ;
data - > A = color . A ;
if ( this . bitmap . PixelFormat = = PixelFormat . Format32bppArgb | |
this . bitmap . PixelFormat = = PixelFormat . Format32bppPArgb )
{
data - > A = color . A ;
}
} }
/// <summary>
/// <summary>
@ -511,6 +502,7 @@ namespace ImageProcessor.Imaging
// Figure out the number of bytes in a row. This is rounded up to be a multiple
// Figure out the number of bytes in a row. This is rounded up to be a multiple
// of 4 bytes, since a scan line in an image must always be a multiple of 4 bytes
// of 4 bytes, since a scan line in an image must always be a multiple of 4 bytes
// in length.
// in length.
this . pixelSize = Image . GetPixelFormatSize ( this . bitmap . PixelFormat ) / 8 ;
this . bytesInARow = bounds . Width * this . pixelSize ; this . bytesInARow = bounds . Width * this . pixelSize ;
if ( this . bytesInARow % 4 ! = 0 ) if ( this . bytesInARow % 4 ! = 0 )
{ {
@ -518,10 +510,34 @@ namespace ImageProcessor.Imaging
} }
// Lock the bitmap
// Lock the bitmap
this . bitmapData = this . bitmap . LockBits ( bounds , ImageLockMode . ReadWrite , this . bitmap . PixelFormat ) ; this . bitmapData = this . bitmap . LockBits ( bounds , ImageLockMode . ReadWrite , PixelFormat . Format32bppPArgb ) ;
// Set the value to the first scan line
// Set the value to the first scan line
this . pixelBase = ( byte * ) this . bitmapData . Scan0 . ToPointer ( ) ; this . pixelBase = ( byte * ) this . bitmapData . Scan0 . ToPointer ( ) ;
// Allocate values for integral image calculation.
this . normalWidth = this . width + 1 ;
int normalHeight = this . height + 1 ;
this . tiltedWidth = this . width + 2 ;
int tiltedHeight = this . height + 2 ;
this . normalSumImage = new long [ normalHeight , this . normalWidth ] ;
this . normalSumHandle = GCHandle . Alloc ( this . normalSumImage , GCHandleType . Pinned ) ;
this . normalSum = ( long * ) this . normalSumHandle . AddrOfPinnedObject ( ) . ToPointer ( ) ;
this . squaredSumImage = new long [ normalHeight , this . normalWidth ] ;
this . squaredSumHandle = GCHandle . Alloc ( this . squaredSumImage , GCHandleType . Pinned ) ;
this . squaredSum = ( long * ) this . squaredSumHandle . AddrOfPinnedObject ( ) . ToPointer ( ) ;
if ( this . computeTilted )
{
this . tiltedSumImage = new long [ tiltedHeight , this . tiltedWidth ] ;
this . tiltedSumHandle = GCHandle . Alloc ( this . tiltedSumImage , GCHandleType . Pinned ) ;
this . tiltedSum = ( long * ) this . tiltedSumHandle . AddrOfPinnedObject ( ) . ToPointer ( ) ;
}
this . CalculateIntegrals ( ) ;
} }
/// <summary>
/// <summary>
@ -638,4 +654,4 @@ namespace ImageProcessor.Imaging
this . pixelBase = null ; this . pixelBase = null ;
} }
} }
} }
James South
11 years ago
