7 replies to this topic

[Facehat]

Don't use pallete entrys 0 and 255, those are reserved.

--TheGoop

[CJ]

The first 10 en last 10 colors are reserved for windows....that's what I know.

And further, it's VB so I don't know

------------------
Dance with me......

[Jim Adams]

As long as you define the PC_NOCOLLAPSE inside you palette entries and use DDPCAPS_ALLOW256, you have the full range to use with no problem.

Try using this method to create the palette:

/*
lpdd
= DirectDraw Interface
lpddpal
= DirectDraw Palette Interface
lpddsprimary
= DirectDraw Primary Buffer Interface
*/

PALETTEENTRY pal[256];

memset(pal, 0, sizeof(PALETTEENTRY) * 256);
for(i=0;i<256;i++) {
pal[i].peRed = i;
pal[i].peGreen = i;
pal[i].peBlue = i;
pal[i].peFlags = PC_NOCOLLAPSE;
}

lpdd->CreatePalette(DDPCAPS_8BIT |
DDPCAPS_INITIALIZE | DDPCAPS_ALLOW256,
pal, &lpddpal, NULL);

lpddsprimary->SetPalette(lpddpal);

Jim

[SonicSilcion]

__So, you're trying to map a different value of gray to each of the 256 colors. I think you might have a samll problem.
__When running in ture 8-bit color there are only 262,144 colors to work with (an 18-bit pallette.) If I'm correct, you'll see banding in gradients.
__Does anyone know more about how this works in Windows?

[This message has been edited by SonicSilcion (edited October 06, 1999).]

[Jim Adams]

If you use the windows palette manager, then it would try to dither it or something to make it look right.

In his case, he couldn't get a full white color, but rather a grayish one when using palette register 255 that he setup previously to a white value.

The thing that I don't know is, with DOS, you have to scale the 8bit value down to 6bit, but I guess DirectX does that automatically when you try to set an 8bit value.

Jim