public static int[] CopyImgBuffer(this MemBitmap memBmp, int width, int height, bool flipY = false)
{
//calculate stride for the width
int destStride = MemBitmap.CalculateStride(width, PixelFormat.ARGB32);
int newBmpW = destStride / 4;
int[] buff2 = new int[newBmpW * height];
unsafe
{
using (TempMemPtr srcBufferPtr = MemBitmap.GetBufferPtr(memBmp))
{
byte *srcBuffer = (byte *)srcBufferPtr.Ptr;
int srcIndex = 0;
int srcStride = memBmp.Stride;
if (flipY)
{
fixed(int *destHead = &buff2[0])
{
byte *destHead2 = (byte *)destHead;
srcBuffer += (height - 1) * srcStride;
for (int line = 0; line < height; ++line)
{
//System.Runtime.InteropServices.Marshal.Copy(srcBuffer, srcIndex, (IntPtr)destHead2, destStride);
MemMx.memcpy((byte *)destHead2, srcBuffer + srcIndex, destStride);
srcIndex -= srcStride;
destHead2 += destStride;
}
}
}
else
{
fixed(int *destHead = &buff2[0])
{
byte *destHead2 = (byte *)destHead;
for (int line = 0; line < height; ++line)
{
//System.Runtime.InteropServices.Marshal.Copy(srcBuffer, srcIndex, (IntPtr)destHead2, destStride);
MemMx.memcpy((byte *)destHead2, srcBuffer + srcIndex, destStride);
srcIndex += srcStride;
destHead2 += destStride;
}
}
}
}
}
return(buff2);
}
/// <summary>
/// copy from mem image direct to hBmpScan0
/// </summary>
/// <param name="srcMemBmp"></param>
/// <param name="dstHBmpScan0"></param>
public static void CopyToWindowsBitmapSameSize(
MemBitmap srcMemBmp,
IntPtr dstHBmpScan0)
{
//1st, fast
//byte[] rawBuffer = ActualImage.GetBuffer(actualImage);
TempMemPtr memPtr = MemBitmap.GetBufferPtr(srcMemBmp);
unsafe
{
MemMx.memcpy((byte *)dstHBmpScan0, (byte *)memPtr.Ptr, srcMemBmp.Stride * srcMemBmp.Height);
}
//System.Runtime.InteropServices.Marshal.Copy(rawBuffer, 0,
// hBmpScan0, rawBuffer.Length);
memPtr.Dispose();
}
public static MemBitmap CopyImgBuffer(this MemBitmap src, int srcX, int srcY, int srcW, int srcH)
{
//simple copy
#if DEBUG
Rectangle orgSourceRect = new Rectangle(0, 0, src.Width, src.Height);
Rectangle requestRect = new Rectangle(srcX, srcY, srcW, srcH);
#endif
Rectangle toCopyRect = Rectangle.Intersect(
new Rectangle(0, 0, src.Width, src.Height), //orgSourceRect
new Rectangle(srcX, srcY, srcW, srcH)); //reqstRect
if (toCopyRect.Width == 0 || toCopyRect.Height == 0)
{
return(null);
}
//-----
MemBitmap copyBmp = new MemBitmap(toCopyRect.Width, toCopyRect.Height);
unsafe
{
using (TempMemPtr srcBufferPtr = MemBitmap.GetBufferPtr(src))
using (TempMemPtr dstBufferPtr = MemBitmap.GetBufferPtr(copyBmp))
{
int *srcPtr = (int *)srcBufferPtr.Ptr;
int *dstPtr = (int *)dstBufferPtr.Ptr;
int lineEnd = srcY + srcH;
int orgSrcW = src.Width;
for (int line = toCopyRect.Top; line < toCopyRect.Bottom; ++line)
{
MemMx.memcpy((byte *)dstPtr, (byte *)(srcPtr + ((line * orgSrcW) + toCopyRect.Left)), toCopyRect.Width * 4);
dstPtr += toCopyRect.Width;
}
}
}
return(copyBmp);
}
/////////////////////////////////////////////////////////////////////////////////////
public static void CopyToGdiPlusBitmapSameSizeNotFlip(
MemBitmap srcMemBmp,
Bitmap dstBitmap)
{
//agg store image buffer head-down
//when copy to window bmp we here to flip
//style1: copy row by row *** (fastest)***
{
//System.GC.Collect();
//System.Diagnostics.Stopwatch sss = new System.Diagnostics.Stopwatch();
//sss.Start();
//for (int i = 0; i < 1000; ++i)
//{
int h = dstBitmap.Height;
int w = dstBitmap.Width;
BitmapData bitmapData1 = dstBitmap.LockBits(
new Rectangle(0, 0,
w,
h),
System.Drawing.Imaging.ImageLockMode.ReadWrite,
dstBitmap.PixelFormat);
IntPtr scan0 = bitmapData1.Scan0;
int stride = bitmapData1.Stride;
//byte[] srcBuffer = ActualImage.GetBuffer(actualImage);
TempMemPtr srcBufferPtr = MemBitmap.GetBufferPtr(srcMemBmp);
unsafe
{
//fixed (byte* bufferH = &srcBuffer[0])
byte *srcBufferH = (byte *)srcBufferPtr.Ptr;
{
byte *target = (byte *)scan0;
int startRowAt = 0;
for (int y = 0; y < h; ++y)
{
//byte* src = bufferH + ((y - 1) * stride);
byte *src = srcBufferH + startRowAt;
//System.Runtime.InteropServices.Marshal.Copy(
// srcBuffer,//src
// startRowAt,
// (IntPtr)target,
// stride);
MemMx.memcpy(target, src, stride);
startRowAt += stride;
target += stride;
}
}
}
srcBufferPtr.Dispose();
dstBitmap.UnlockBits(bitmapData1);
//}
//sss.Stop();
//long ms = sss.ElapsedMilliseconds;
}
//-----------------------------------
//style2: copy all, then flip again
//{
// System.GC.Collect();
// System.Diagnostics.Stopwatch sss = new System.Diagnostics.Stopwatch();
// sss.Start();
// for (int i = 0; i < 1000; ++i)
// {
// byte[] rawBuffer = ActualImage.GetBuffer(actualImage);
// var bmpdata = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height),
// System.Drawing.Imaging.ImageLockMode.ReadOnly,
// bitmap.PixelFormat);
// System.Runtime.InteropServices.Marshal.Copy(rawBuffer, 0,
// bmpdata.Scan0, rawBuffer.Length);
// bitmap.UnlockBits(bmpdata);
// bitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
// }
// sss.Stop();
// long ms = sss.ElapsedMilliseconds;
//}
//-----------------------------------
//-----------------------------------
//style3: copy row by row +
//{
// System.GC.Collect();
// System.Diagnostics.Stopwatch sss = new System.Diagnostics.Stopwatch();
// sss.Start();
// for (int i = 0; i < 1000; ++i)
// {
// int h = bitmap.Height;
// int w = bitmap.Width;
// BitmapData bitmapData1 = bitmap.LockBits(
// new Rectangle(0, 0,
// w,
// h),
// System.Drawing.Imaging.ImageLockMode.ReadWrite,
// bitmap.PixelFormat);
// IntPtr scan0 = bitmapData1.Scan0;
// int stride = bitmapData1.Stride;
// byte[] buffer = ActualImage.GetBuffer(actualImage);
// unsafe
// {
// fixed (byte* bufferH = &buffer[0])
// {
// byte* target = (byte*)scan0;
// for (int y = h; y > 0; --y)
// {
// byte* src = bufferH + ((y - 1) * stride);
// for (int n = stride - 1; n >= 0; --n)
// {
// *target = *src;
// target++;
// src++;
// }
// }
// }
// }
// bitmap.UnlockBits(bitmapData1);
// }
// sss.Stop();
// long ms = sss.ElapsedMilliseconds;
//}
}
