OSDToBMP.c

Go to the documentation of this file.

#include "FBLib_av.h"
#include "libFireBird.h"
 
void OSDToBMP(TYPE_OsdBaseInfo *OsdBaseInfo, int BMPwidth, int BMPheight, byte *BMPPixelBuffer, int Alpha)
{
  TRACEENTER();
 
  dword                *pixel;
  register int          pos, x, y;
  int                   n1, n2, nR, nG, nB;
 
  (void)Alpha;
 
  if (!BMPPixelBuffer)
  {
    TRACEEXIT();
    return;
  }
 
  pixel = OsdBaseInfo->frameBuffer;
  for(y = 0; y < BMPheight; y++)
  {
    for(x = 0; x < BMPwidth; x++ )
    {
      pos = ((BMPheight - y - 1) * BMPwidth + x) * 3;
 
      n1 = A8888(*pixel) / 2.55;
      n2 = 100 - n1;
 
      nR = (n2 * BMPPixelBuffer[pos + 2] + n1 * R8888(*pixel)) / 100;
      nG = (n2 * BMPPixelBuffer[pos + 1] + n1 * G8888(*pixel)) / 100;
      nB = (n2 * BMPPixelBuffer[pos]     + n1 * B8888(*pixel)) / 100;
 
      BMPPixelBuffer[pos + 2] = _Clip(nR);
      BMPPixelBuffer[pos + 1] = _Clip(nG);
      BMPPixelBuffer[pos]     = _Clip(nB);
 
      pixel++;
    }
  }
 
  TRACEEXIT();
}