int __fastcall BitmapRenderBlock(int p_n26, int n26, int a3)
{
  unsigned int *p_n3; // edi
  int n26_1; // eax
  int v5; // ebp
  int n26_2; // esi
  int v7; // edx
  int count; // ebx
  int ImageSize; // eax
  int ColorsUsed; // eax
  int ImageSize_1; // [esp+8h] [ebp-8h]

  p_n3 = *(unsigned int **)(p_n26 + 8);
  n26_1 = n26;
  v5 = 0;
  if ( p_n3 )
  {
    while ( 1 )
    {
      n26_2 = n26_1;
      if ( !n26_1 )
        n26_2 = 1;
      if ( !*p_n3 )
      {
        count = p_n3[1];
        ImageSize = BitmapGetImageSize(count);
        goto LABEL_11;
      }
      if ( *p_n3 == 1 )
        break;
      if ( *p_n3 == 2 )
      {
        count = p_n3[1];
        ImageSize = 8 * count;
LABEL_11:
        ImageSize_1 = ImageSize;
        ColorsUsed = BitmapGetColorsUsed(*p_n3, n26_2, a3);
        v7 = ImageSize_1 + (ColorsUsed + 4) * ((count + (1 << ColorsUsed) - 1) / (1 << ColorsUsed));
        goto LABEL_12;
      }
      v7 = 0;
LABEL_12:
      p_n3 = (unsigned int *)p_n3[4];
      v5 += v7;
      n26_1 = n26;
      if ( !p_n3 )
        return v5;
    }
    count = p_n3[1];
    ImageSize = BitmapGetDataOffset(count);
    goto LABEL_11;
  }
  return v5;
}