public BitmapData LockBits(Size Size, ImageLockMode LockMode, PixelFormat Format)
{
var Data = Base.LockBits(new Rectangle(Point.Empty, Size), LockMode, Format);
OnLockBits?.Invoke(Data);
return(Data);
}
public BitmapCache(Bitmap bmp, ImageLockMode lockMode)
{
this.bmp = bmp;
PixelCount = bmp.Width * bmp.Height;
this.lockMode = lockMode;
LockImage();
}
// Lock a region of this bitmap. Use of this method is discouraged.
// It assumes that managed arrays are fixed in place in memory,
// which is true for ilrun, but maybe not other CLR implementations.
// We also assume that "format" is the same as the bitmap's real format.
public unsafe BitmapData LockBits
(Rectangle rect, ImageLockMode flags,
PixelFormat format)
{
BitmapData bitmapData = new BitmapData();
bitmapData.Width = rect.Width;
bitmapData.Height = rect.Height;
bitmapData.PixelFormat = format;
if (dgImage != null)
{
Frame frame = dgImage.GetFrame(0);
if (frame != null)
{
if (format != PixelFormat)
{
frame = frame.Reformat(format);
}
bitmapData.Stride = frame.Stride;
byte[] data = frame.Data;
bitmapData.dataHandle = GCHandle.Alloc(data);
int offset = rect.X * GetPixelFormatSize(format) / 8;
// TODO: will GCHandle.AddrOfPinnedObject work more
// portably across GCs ?
fixed(byte *pixel = &(data[rect.Y * frame.Stride]))
{
bitmapData.Scan0 = (IntPtr)(void *)(pixel + offset);
}
}
}
return(bitmapData);
}
public BitmapData LockBits(Rectangle Area, ImageLockMode LockMode, PixelFormat Format, BitmapData OriData)
{
var Data = Base.LockBits(Area, LockMode, Format, OriData);
OnLockBits?.Invoke(Data);
return(Data);
}
/// <summary>
/// Initializes a new instance of the <see cref="ImageBuffer"/> class.
/// </summary>
public ImageBuffer(Bitmap bitmap, ImageLockMode lockMode)
{
// locks the image data
this.bitmap = bitmap;
this.lockMode = lockMode;
// gathers the informations
Width = bitmap.Width;
Height = bitmap.Height;
PixelFormat = bitmap.PixelFormat;
IsIndexed = PixelFormat.IsIndexed();
BitDepth = PixelFormat.GetBitDepth();
BytesPerPixel = Math.Max(1, BitDepth >> 3);
// determines the bounds of an image, and locks the data in a specified mode
Rectangle bounds = Rectangle.FromLTRB(0, 0, Width, Height);
// locks the bitmap data
lock (bitmap) bitmapData = bitmap.LockBits(bounds, lockMode, PixelFormat);
// creates internal buffer
Stride = bitmapData.Stride < 0 ? -bitmapData.Stride : bitmapData.Stride;
Size = Stride*Height;
// precalculates the offsets
Precalculate();
}
public BitmapLocker(Bitmap bitmap, ImageLockMode lockMode = ImageLockMode.ReadWrite)
{
this.Bitmap = bitmap;
// GDI+ still lies to us - the return format is BGR, NOT RGB.
this.BitmapData = this.Bitmap.LockBits(
new Rectangle(0, 0, this.Bitmap.Width, this.Bitmap.Height), lockMode, PixelFormat.Format24bppRgb);
}
public BitmapTool(Bitmap source, bool isReadOnly = false, bool isImmediateInitPixels = false)
{
this.Source = source;
// get source bitmap pixel format size
Depth = Image.GetPixelFormatSize(source.PixelFormat);
// Check if bpp (Bits Per Pixel) is 8, 24, or 32
if (Depth != 8 && Depth != 24 && Depth != 32)
{
throw new ArgumentException("Only 8, 24 and 32 bpp images are supported.");
}
// Get width and height of bitmap
Width = source.Width;
Height = source.Height;
// get total locked pixels count
PixelCount = Width * Height;
// Create rectangle to lock
Rect = new Rectangle(0, 0, Width, Height);
// create byte array to copy pixel values
Step = Depth / 8;
PixelLength = PixelCount * Step;
Pixels = new byte[PixelLength];
imageLockMode = isReadOnly ? ImageLockMode.ReadOnly : imageLockMode;
if (isImmediateInitPixels)
{
ReadLockBits();
WriteUnlockBits();
}
}
public BitmapPlus(Bitmap bitmap, ImageLockMode lockMode)
{
Source = bitmap;
Cols = Source.Width;
Rows = Source.Height;
_pixelCount = Source.Width * Source.Height;
_imgLockMode = lockMode;
Rectangle lockRectangle = new Rectangle(0, 0, Source.Width, Source.Height);
_depth = Image.GetPixelFormatSize(Source.PixelFormat);
if (_depth != 8 && _depth != 24 && _depth != 32)
{
throw new ArgumentException("Only 8, 24 and 32 bpp images are supported.");
}
Data = Source.LockBits(lockRectangle, _imgLockMode, Source.PixelFormat);
_colorStep = _depth / 8;
Pixels = new byte[_pixelCount * _colorStep];
imagePointer = Data.Scan0;
// Copy data from pointer to array
Marshal.Copy(imagePointer, Pixels, 0, Pixels.Length);
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="bitmap">位图</param>
/// <param name="flags">读写模式</param>
/// <param name="format">像素格式</param>
public LockedBitmapData(Bitmap bitmap, ImageLockMode flags, PixelFormat format)
{
this.m_Bitmap = bitmap;
Rectangle rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
this.m_BitmapData = this.m_Bitmap.LockBits(rect, flags, format);
}
public LockData(Bitmap bmp, Rectangle rect, ImageLockMode mode = ImageLockMode.ReadOnly)
{
Data = bmp.LockBits(rect, mode, bmp.PixelFormat);
bitmap = bmp;
bytes = bmp.BytesPerPixel();
}
/// <summary>
/// Initializes a new instance of the <see cref="ImageBuffer"/> class.
/// </summary>
public ImageBuffer(Bitmap bitmap, ImageLockMode lockMode)
{
// locks the image data
this.bitmap = bitmap;
this.lockMode = lockMode;
// gathers the informations
Width = bitmap.Width;
Height = bitmap.Height;
PixelFormat = bitmap.PixelFormat;
IsIndexed = PixelFormat.IsIndexed();
BitDepth = PixelFormat.GetBitDepth();
BytesPerPixel = Math.Max(1, BitDepth >> 3);
// determines the bounds of an image, and locks the data in a specified mode
Rectangle bounds = Rectangle.FromLTRB(0, 0, Width, Height);
// locks the bitmap data
lock (bitmap) bitmapData = bitmap.LockBits(bounds, lockMode, PixelFormat);
// creates internal buffer
Stride = bitmapData.Stride < 0 ? -bitmapData.Stride : bitmapData.Stride;
Size = Stride * Height;
// precalculates the offsets
Precalculate();
}
public LockData(Bitmap bmp, Rectangle rect, ImageLockMode mode = ImageLockMode.ReadOnly)
{
Data = bmp.LockBits(rect, mode, bmp.PixelFormat);
bitmap = bmp;
bytes = bmp.BytesPerPixel();
}
/// <summary>
/// Begin editing an image.
/// </summary>
public static byte[] Begin(Bitmap bitmap, ImageLockMode lockMode, out BitmapData bmpData)
{
// Lock full image
Rectangle rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
// Lock the bitmap's bits while we change them.
bmpData = bitmap.LockBits(rect, lockMode, bitmap.PixelFormat);
// Create length with number of bytes in image
byte[] rgbValues = new byte[bmpData.GetByteCount()];
// Copy the RGB values into the array.
Marshal.Copy(bmpData.Scan0, rgbValues, 0, rgbValues.Length);
// Check if monochrome
if (bitmap.PixelFormat == PixelFormat.Format1bppIndexed)
{
// Adjust stride
bmpData.Stride *= Constants.BitsPerByte;
// Convert each bit to a separate byte
return(ImageBytes.BytesToBits(rgbValues));
}
else
{
return(rgbValues);
}
}
internal DisposableImageData(Bitmap bitmap, Rectangle rect, ImageLockMode flags, PixelFormat format)
{
if (bitmap == null)
throw new ArgumentNullException("bitmap");
_bitmap = bitmap;
_data = bitmap.LockBits(rect, flags, format);
}
public BitmapLocker(Bitmap bitmap, ImageLockMode lockMode = ImageLockMode.ReadWrite)
{
this.Bitmap = bitmap;
// GDI+ still lies to us - the return format is BGR, NOT RGB.
this.BitmapData = this.Bitmap.LockBits(
new Rectangle(0, 0, this.Bitmap.Width, this.Bitmap.Height), lockMode, PixelFormat.Format24bppRgb);
}
public BitmapCache(Bitmap bmp, ImageLockMode lockMode)
{
this.bmp = bmp;
PixelCount = bmp.Width * bmp.Height;
this.lockMode = lockMode;
LockImage();
}
public FastBitmap(Bitmap bitmap, ImageLockMode lockMode, PixelFormat pixelFormat)
{
_bitmap = bitmap;
Data = bitmap.LockBits(new Rectangle(new Point(0, 0), bitmap.Size), lockMode, pixelFormat);
Bpp = Data.Stride / Data.Width;
Start = (byte *)Data.Scan0;
}
public UnsafeBitmap(Bitmap bitmap, bool lockBitmap = false, ImageLockMode imageLockMode = ImageLockMode.ReadWrite)
{
this.bitmap = bitmap;
Width = bitmap.Width;
Height = bitmap.Height;
if (lockBitmap) Lock(imageLockMode);
}
/// <summary>
/// 鎖定圖片並傳回Scan0記憶體位置
/// </summary>
/// <param name="imageLockMode">縮定模式</param>
/// <returns>Scan0記憶體位置</returns>
public IntPtr LockBitsAndGetScan0(ImageLockMode imageLockMode)
{
UnlockBits();
Rectangle rect = new Rectangle(0, 0, Width, Height);
_bitmapData = Image.LockBits(rect, imageLockMode, PixelFormat.Format32bppArgb);
return(_bitmapData.Scan0);
}
public static FastBitmap FastLock(this Bitmap bitmap, ImageLockMode mode)
{
var fast = new FastBitmap(bitmap);
fast.Lock(mode);
return(fast);
}
public BitmapLocker(Bitmap bitmap, ImageLockMode mode)
{
Validate.IsNotNull(bitmap, "bitmap");
_bitmap = bitmap;
Rectangle rect = new Rectangle(0, 0, _bitmap.Width, _bitmap.Height);
_bitmapData = bitmap.LockBits(rect, mode, _bitmap.PixelFormat);
}
public DirectBitmapAccess([NotNull] Bitmap bitmap, ImageLockMode lockMode, bool premultiplied)
{
_bitmap = bitmap;
var rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
var format = premultiplied ? PixelFormat.Format32bppPArgb : PixelFormat.Format32bppArgb;
_bitmapData = bitmap.LockBits(rect, lockMode, format);
}
public BitmapData LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format)
{
Contract.Ensures(Contract.Result <BitmapData>() != null);
BitmapData bitmapData = new BitmapData();
return(LockBits(rect, flags, format, bitmapData));
}
public void LockHostBitmap(ImageLockMode imageLockMode)
{
ImageLockMode = imageLockMode;
BitmapData = LockEntireBitmap(Bitmap, imageLockMode);
if (ImageLockMode == ImageLockMode.ReadWrite || imageLockMode == ImageLockMode.WriteOnly)
{
}
}
// Constructor locks the bitmap.
public PixelAccessor(Bitmap bitmap, ImageLockMode mode, Rectangle?region = null)
{
this.bitmap = bitmap;
Region = region.GetValueOrDefault(new Rectangle(0, 0, bitmap.Width, bitmap.Height));
data = bitmap.LockBits(Region, mode, PixelFormat.Format32bppArgb);
}
private BitmapLocker(Bitmap bitmapToLock, ImageLockMode lockMode, Rectangle rect)
{
bitmap = bitmapToLock;
this.lockMode = lockMode;
areaToLock = rect;
format = bitmap.PixelFormat;
Lock();
}
/// <summary>
/// ビットマップとフラグをもとに BitmapController クラスのインスタンスを初期化します。
/// </summary>
/// <param name="bitmap">元となるビットマップ。</param>
/// <param name="flags">メモリロックフラグ。</param>
public BitmapController(Bitmap bitmap, ImageLockMode flags)
{
if (bitmap == null)
throw new ArgumentNullException("bitmap");
this.bitmap = bitmap;
this.data = bitmap.LockBits(new Rectangle(Point.Empty, bitmap.Size), flags, PixelFormat.Format32bppArgb);
this.scan0 = data.Scan0;
}
public void Lock(ImageLockMode imageLockMode = ImageLockMode.ReadWrite)
{
if (!IsLocked)
{
IsLocked = true;
bitmapData = bitmap.LockBits(new Rectangle(0, 0, Width, Height), imageLockMode, PixelFormat.Format32bppArgb);
Pointer = (ColorBgra*)bitmapData.Scan0.ToPointer();
}
}
protected unsafe Texture(Bitmap bitmap, ImageLockMode imageLockMode)
{
_bitmap = bitmap;
_width = _bitmap.Width;
_height = _bitmap.Height;
_bitmapData = _bitmap.LockBits(new Rectangle(0, 0, _width, _height), imageLockMode,
PixelFormat.Format32bppRgb);
_data = (int *)_bitmapData.Scan0;
}
public void Lock(ImageLockMode imageLockMode = ImageLockMode.ReadWrite)
{
if (!IsLocked)
{
IsLocked = true;
bitmapData = bitmap.LockBits(new Rectangle(0, 0, Width, Height), imageLockMode, PixelFormat.Format32bppArgb);
Pointer = (ColorBgra *)bitmapData.Scan0.ToPointer();
}
}
private byte[] getImageBytes(Bitmap image, ImageLockMode lockMode, out BitmapData bmpData)
{
bmpData = image.LockBits(new Rectangle(0, 0, image.Width, image.Height),
lockMode, image.PixelFormat);
byte[] imageBytes = new byte[bmpData.Stride * image.Height];
Marshal.Copy(bmpData.Scan0, imageBytes, 0, imageBytes.Length);
return(imageBytes);
}
public BitmapDataReleaser(Bitmap bitmap, Rectangle rectangle, PixelFormat?pixelFormat = null, ImageLockMode imageLockMode = ImageLockMode.ReadOnly)
{
Bitmap = bitmap;
Rectangle = rectangle;
PixelFormat = pixelFormat ?? bitmap.PixelFormat;
ImageLockMode = imageLockMode;
Data = bitmap.LockBits(Rectangle, ImageLockMode, PixelFormat);
}
internal DisposableImageData(Bitmap bitmap, Rectangle rect, ImageLockMode flags, PixelFormat format)
{
if (bitmap == null)
{
throw new ArgumentNullException("bitmap");
}
_bitmap = bitmap;
_data = bitmap.LockBits(rect, flags, format);
}
BitmapData LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format, BitmapData bitmapData)
{
Status status = GDIPlus.GdipBitmapLockBits(nativeObject, ref rect, flags, format, bitmapData);
//NOTE: scan0 points to piece of memory allocated in the unmanaged space
GDIPlus.CheckStatus(status);
return(bitmapData);
}
private BitmapData GetBitmapData(
Bitmap bitmap, ImageLockMode lockMode)
{
return(bitmap.LockBits(
new System.Drawing.Rectangle(0, 0,
bitmap.Width, bitmap.Height),
lockMode,
System.Drawing.Imaging.PixelFormat.Format24bppRgb));
}
public BitmapData LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format, BitmapData bitmapData)
{
var gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipBitmapLockBits(new HandleRef(this, nativeImage), ref gprect,
flags, format, bitmapData);
SafeNativeMethods.Gdip.CheckStatus(status);
return(bitmapData);
}
public void LockBits(Rectangle area, ImageLockMode lockMode = ImageLockMode.ReadWrite)
{
if (IsLocked)
{
throw new ArgumentException("This source already has locked bits");
}
Source = _image.LockBits(area, lockMode, _image.PixelFormat);
IsLocked = true;
}
/// <summary>
/// Locks the bitmap to start the bitmap operations
/// </summary>
/// <param name="lockMode">The lock mode to use on the bitmap</param>
/// <param name="rect">The rectangle to lock</param>
/// <param name="pixelFormat">A pixel format to use when locking the underlying bitmap</param>
/// <returns>A fast bitmap locked struct that will unlock the underlying bitmap after disposal</returns>
/// <exception cref="System.ArgumentException">The provided region is invalid</exception>
/// <exception cref="System.Exception">The locking operation in the underlying bitmap failed</exception>
/// <exception cref="InvalidOperationException">The bitmap region is already locked</exception>
/// <exception cref="ArgumentException"><see cref="!:pixelFormat"/> is not a 32bpp format</exception>
private FastBitmapLocker Lock(ImageLockMode lockMode, Rectangle rect, PixelFormat pixelFormat)
{
// Lock the bitmap's bits
_bitmapData = _bitmap.LockBits(rect, lockMode, pixelFormat);
_scan0 = (int *)_bitmapData.Scan0;
Stride = _bitmapData.Stride / BytesPerPixel;
StrideInBytes = _bitmapData.Stride;
Locked = true;
return(new FastBitmapLocker(this));
}
private void Initialize(Bitmap bmp, ImageLockMode imageLockMode)
{
bitmap = bmp;
depth = System.Drawing.Image.GetPixelFormatSize(bitmap.PixelFormat);
if (depth != 8 && depth != 24 && depth != 32)
{
throw new ArgumentException("Only 8, 24 and 32 bpp images are supported.");
}
bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
imageLockMode, PixelFormat.Format32bppArgb);
}
public FastBitmap(Bitmap bitmap, ImageLockMode lockMode, bool cleanSlate = false)
{
int byteCount = bitmap.Width * bitmap.Height * bpp;
_bytes = new byte[byteCount];
_bitmap = bitmap;
_bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), lockMode,
PixelFormat.Format32bppArgb);
if (!cleanSlate)
Marshal.Copy(_bitmapData.Scan0, _bytes, 0, byteCount);
}
public BitmapData LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format)
{
if (this.InternalBitmapData == null)
{
var x = this.InternalContext.getImageData(0, 0, this.Width, this.Height);
var p = new __IntPtr
{
PointerToUInt8 = x.data
};
this.InternalBitmapData = new __BitmapData
{
Scan0 = (IntPtr)(object)p,
InternalImageData = x
};
}
return (BitmapData)(object)this.InternalBitmapData;
}
public static DisposableImageData LockBitsDisposable(this Bitmap bitmap, Rectangle rect, ImageLockMode flags, PixelFormat format)
{
return new DisposableImageData(bitmap, rect, flags, format);
}
public BitmapData LockBits(RectangleF rect, ImageLockMode flags, PixelFormat format)
{
throw new NotImplementedException ();
}
public BitmapDataReleaser(Bitmap bitmap, Rectangle rectangle, PixelFormat? pixelFormat = null, ImageLockMode imageLockMode = ImageLockMode.ReadOnly)
{
this.Bitmap = bitmap;
this.Rectangle = rectangle;
this.PixelFormat = pixelFormat ?? bitmap.PixelFormat;
this.ImageLockMode = imageLockMode;
this.Data = bitmap.LockBits(Rectangle, ImageLockMode, PixelFormat);
}
public BitmapData LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format) {
Contract.Ensures(Contract.Result<BitmapData>() != null);
BitmapData bitmapData = new BitmapData();
return LockBits(rect, flags, format, bitmapData);
}
public static unsafe void UnsafeTransformation(this Bitmap b, UnsafeImageTransformation transformer, PixelFormat format, ImageLockMode m)
{
BitmapData bits = b.LockBits(b.GetImageSizeRectangle(), m, format);
unsafe
{
byte* input = (byte*)bits.Scan0;
transformer(bits, input);
}
b.UnlockBits(bits);
}
public static BitmapDataReleaser Lock(this Bitmap bitmap, Rectangle rect, PixelFormat pixelFormat, ImageLockMode imageLockMode = ImageLockMode.ReadOnly)
{
return new BitmapDataReleaser(bitmap, rect, pixelFormat, imageLockMode);
}
public BitmapData LockBits(Rectangle rectangle, ImageLockMode readOnly, PixelFormat pixelFormat)
{
switch (pixelFormat)
{
case PixelFormat.Alpha:
case PixelFormat.PAlpha:
case PixelFormat.Indexed:
case PixelFormat.Undefined:
throw new ArgumentException("LockBits method only applicable to pixel formats with prefix Format",
"pixelFormat");
}
if (!pixelFormat.Equals(_pixelFormat))
throw new ArgumentException(String.Format("Bitmap.PixelFormat = {0}", _pixelFormat), "pixelFormat");
return new BitmapData(_width, _height, _stride, _pixelFormat, _scan0);
}
private byte[] HashLock (Bitmap bmp, int width, int height, PixelFormat fmt, ImageLockMode mode)
{
int len = bmp.Width * bmp.Height * 4;
byte[] pixels = new byte[len];
BitmapData bd = bmp.LockBits (new Rectangle (0, 0, width, height), mode, fmt);
try {
int index = 0;
int bbps = Image.GetPixelFormatSize (fmt);
long pos = bd.Scan0.ToInt64 ();
byte[] btv = new byte[1];
for (int y = 0; y < bd.Height; y++) {
for (int x = 0; x < bd.Width; x++) {
/* Read the pixels*/
for (int bt = 0; bt < bbps / 8; bt++, index++) {
long cur = pos;
cur += y * bd.Stride;
cur += x * bbps / 8;
cur += bt;
Marshal.Copy ((IntPtr) cur, btv, 0, 1);
pixels[index] = btv[0];
/* Make change of all the colours = 250 to 10*/
if (btv[0] == 250) {
btv[0] = 10;
Marshal.Copy (btv, 0, (IntPtr) cur, 1);
}
}
}
}
for (int i = index; i < len; i++)
pixels[index] = 0;
}
finally {
bmp.UnlockBits (bd);
}
return MD5.Create ().ComputeHash (pixels);
}
public System.Drawing.Imaging.BitmapData LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format) { return DATA.LockBits(rect, flags, format); }
protected bool Lock(ImageLockMode mode, Rectangle rectangle)
{
// No texture bounds
if (ID == -1 || IsLocked)
return false;
Data = new byte[rectangle.Width * rectangle.Height * 4];
LockMode = mode;
IsLocked = true;
if (mode == ImageLockMode.WriteOnly)
return true;
GL.BindTexture(TextureTarget.Texture2D, ID);
// Get the whole texture
if (rectangle == new Rectangle(Point.Empty, Size))
{
GL.GetTexImage<byte>(TextureTarget.Texture2D, 0, (OpenTK.Graphics.OpenGL.PixelFormat)PixelFormat, PixelType.UnsignedByte, Data);
}
else
{
GL.ReadPixels(rectangle.Left, rectangle.Top, rectangle.Width, rectangle.Height, (OpenTK.Graphics.OpenGL.PixelFormat)PixelFormat, PixelType.UnsignedByte, Data);
}
return true;
}
public void LockHostBitmap(ImageLockMode imageLockMode)
{
ImageLockMode = imageLockMode;
BitmapData = LockEntireBitmap(Bitmap, imageLockMode);
if (ImageLockMode == ImageLockMode.ReadWrite || imageLockMode == ImageLockMode.WriteOnly)
{
}
}
protected BitmapData LockEntireBitmap( Bitmap bitmap, ImageLockMode imageLockMode )
{
Rectangle r = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
return bitmap.LockBits(r, imageLockMode, PixelFormat.Format32bppArgb);
}
public void UnlockHostBitmap()
{
Bitmap.UnlockBits(BitmapData);
BitmapData = null;
ImageLockMode = ImageLockMode.ReadWrite;
}
public void UnlockBits(BitmapData data)
{
if (bitsLockMode == ImageLockMode.ReadOnly)
{
pinnedScanArray.Free ();
bitsLockMode = 0;
return;
}
//int destStride = data.Width * (NativeCGImage.BitsPerPixel / NativeCGImage.BitsPerComponent);
int destStride = data.Stride;
// Declare our size
var scanLength = destStride * Height;
// This is fine here for now until we support other formats but right now it is RGBA
var pixelSize = GetPixelFormatComponents (data.PixelFormat);
if (pixelSize == 4)
Convert_BGRA_8888_To_P_RGBA_8888 (data.Scan0, bitmapBlock, scanLength);
else
Convert_BGR_888_To_P_RGBA_8888 (data.Scan0, bitmapBlock, scanLength);
// Create a bitmap context from the pixel data
var bitmapContext = CreateCompatibleBitmapContext (data.Width, data.Height, data.PixelFormat, bitmapBlock);
// Dispose of the prevous image that is allocated.
NativeCGImage.Dispose ();
// Get the image from the bitmap context.
NativeCGImage = bitmapContext.ToImage ();
// Dispose of the bitmap context as it is no longer needed
bitmapContext.Dispose ();
// we need to free our pointer
pinnedScanArray.Free();
bitsLockMode = 0;
}
protected bool Lock(ImageLockMode mode)
{
return Lock(mode, new Rectangle(Point.Empty, Size));
}
public BitmapData LockBits(RectangleF rect, ImageLockMode flags, PixelFormat pixelFormat)
{
BitmapData bitmapData = new BitmapData ();
if (!ConversionHelpers.sTablesInitialized)
ConversionHelpers.CalculateTables ();
// Calculate our strides
int srcStride = (int)rect.Width * (NativeCGImage.BitsPerPixel / NativeCGImage.BitsPerComponent);
int numOfComponents = GetPixelFormatComponents(pixelFormat);
int stride = (int)rect.Width * numOfComponents;
// Calculate our lengths
int srcScanLength = (int)(Math.Abs(srcStride) * rect.Height);
int scanLength = (int)(Math.Abs(stride) * rect.Height);
// Declare an array to hold the scan bytes of the bitmap.
byte[] scan0 = new byte[scanLength];
pinnedScanArray = GCHandle.Alloc(scan0, GCHandleType.Pinned);
bitmapData.Scan0 = pinnedScanArray.AddrOfPinnedObject();
byte[] srcScan0 = new byte[srcScanLength];
IntPtr ptr = bitmapBlock;
if (ptr == IntPtr.Zero)
{
var pData = NativeCGImage.DataProvider;
var nData = pData.CopyData ();
ptr = nData.Bytes;
}
// Copy the RGB values into the scan array.
System.Runtime.InteropServices.Marshal.Copy(ptr, srcScan0, 0, srcScanLength);
if (numOfComponents == 4)
Convert_P_RGBA_8888_To_BGRA_8888 (ref scan0, srcScan0);
else
Convert_P_RGBA_8888_To_BGR_888 (ref scan0, srcScan0);
// We need to support sub rectangles.
if (rect != new RectangleF (new PointF (0, 0), physicalDimension))
{
throw new NotImplementedException("Sub rectangles of bitmaps not supported yet.");
}
else
{
bitmapData.Height = (int)rect.Height;
bitmapData.Width = (int)rect.Width;
bitmapData.PixelFormat = pixelFormat;
bitmapData.Stride = stride;
}
return bitmapData;
}
public BitmapData LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format, BitmapData bitmapData)
{
Contract.Ensures(Contract.Result<BitmapData>() != null);
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipBitmapLockBits(new HandleRef(this, nativeImage), ref gprect,
flags, format, bitmapData);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return bitmapData;
}
internal DisposableImageData(Bitmap bitmap, Rectangle rect, ImageLockMode flags, PixelFormat format)
{
_bitmap = bitmap;
_data = bitmap.LockBits(rect, flags, format);
}
internal static extern Status GdipBitmapLockBits (IntPtr bmp, ref Rectangle rc, ImageLockMode flags, PixelFormat format, [In, Out] BitmapData bmpData);