unsafe static private int ARGB32_To_RGB24(
int dwWidthInPixels,
int dwHeightInPixels,
int dwDestStride,
IntPtr ipSrc,
IntPtr ipDest
)
{
RGBQUAD *pSrc = (RGBQUAD *)ipSrc;
RGB24 * pDest = (RGB24 *)ipDest;
for (int y = 0; y < dwHeightInPixels; y++)
{
for (int x = 0; x < dwWidthInPixels; x++)
{
pDest[x].rgbRed = pSrc[x].R;
pDest[x].rgbGreen = pSrc[x].G;
pDest[x].rgbBlue = pSrc[x].B;
}
pSrc += dwWidthInPixels * 3;
pDest += dwDestStride;
}
return(dwDestStride * dwHeightInPixels);
}
public void Copy(ByteImage byteImage)
{
byte * p = byteImage.Data(0, 0);
RGB24 *pOut = data;
for (int i = 0; i < width * height; i++)
{
pOut->R = pOut->G = pOut++->B = *p++;
}
}
public void Copy(RGBImage rgbImage)
{
RGB24 * p = rgbImage.Data(0, 0);
ARGB32 *pOut = data;
for (int i = 0; i < width * height; i++)
{
pOut->A = 255;
pOut->R = p->R;
pOut->G = p->G;
pOut++->B = p++->B;
}
}
public void DecimateAndReduce(RGBImage a, int factor)
{
byte *output = data;
for (int y = 0; y < height; y++)
{
RGB24 *pa = a.Data(0, y * factor);
for (int x = 0; x < width; x++)
{
*output++ = (*pa).R;
pa += factor;
}
}
}
public void CopyRectangle(RGBImage rgbImage, int startX, int startY, int w, int h)
{
RGB24 * pOrig = rgbImage.Data(0, 0);
ARGB32 *pOutOrig = data;
RGB24 * p;
ARGB32 *pOut;
for (int j = startY; j < h; j++)
{
for (int i = startX; i < w; i++)
{
p = pOrig + j * rgbImage.Width + i;
pOut = pOutOrig + j * width + i;
pOut->A = 255;
pOut->R = p->R;
pOut->G = p->G;
pOut->B = p->B;
}
}
}
//-------------------------------------------------------------------
// TransformImage_RGB24
//
// RGB-24 to RGB-32
//-------------------------------------------------------------------
unsafe private static void TransformImage_RGB24(IntPtr pDest, int lDestStride, IntPtr pSrc, int lSrcStride, int dwWidthInPixels, int dwHeightInPixels)
{
RGB24 * source = (RGB24 *)pSrc;
RGBQUAD *dest = (RGBQUAD *)pDest;
lSrcStride /= 3;
lDestStride /= 4;
for (int y = 0; y < dwHeightInPixels; y++)
{
for (int x = 0; x < dwWidthInPixels; x++)
{
dest[x].R = source[x].rgbRed;
dest[x].G = source[x].rgbGreen;
dest[x].B = source[x].rgbBlue;
dest[x].A = 0;
}
source += lSrcStride;
dest += lDestStride;
}
}
public RGBImage(int width, int height, IntPtr dataIntPtr)
: base(width, height, dataIntPtr, sizeof(RGB24))
{
data = (RGB24 *)dataIntPtr.ToPointer();
}
public RGBImage(int width, int height, IntPtr dataIntPtr)
: base(width, height, dataIntPtr, sizeof(RGB24))
{
data = (RGB24*)dataIntPtr.ToPointer();
}
