16-24 bit fades in DDraw

wendieu · 2002-03-21T11:42:31

Okay I am currently making a game in MSVC++ in Direct Draw in 16 bpp. I am trying to make the screen fade to black but it will not work. Can anyone help me to have the screen fade to black? Edited by - wendieu on March 20, 2002 1:55:03 PM

Graphics and GPU Programming Programming

Started by wendieu March 20, 2002 11:38 AM

13 comments, last by wendieu 22 years ago

Anonymous

March 21, 2002 09:05 AM

If you''re just fading to black.. why not do something like this.. obviously there are more efficient ways of doing this, but at least this will show you exactly what''s going on :o).

you have your pointer to a 16-bit surface, and you''re width/height (unsigned short *Ptr_16Bit,unsigned short width ,height

  void Fade16(unsigned short *Ptr_16Bit, unsigned short width, unsigned short height){ int x,y; unsigned char r,g,b; for (y=0;y!=height;++y) {  for (x=0;x!=width;++x)  {//Get r,g,b   r = ((*Ptr_16Bit)&31);   g = (((*Ptr_16Bit)>>5)&63);   b = (((*Ptr_16Bit)>>11)&31);   if (r) --r; //Subrtact 1 if not 0!   if (g) --g; //Subrtact 1 if not 0!   if (b) --b; //Subrtact 1 if not 0!   *Ptr_16Bit=(b<<11) + (g<<5) + r; //Set our new value!   ++Ptr_16Bit; //Increment to next value!  } }}

Billy - BillyB@mrsnj.com