Loading Images of different type

SDL Development
1

I am trying to write an SDL app that will load/view .SHP files. I wrote a
seperate app that reads the header and decompresses the file leaving just
the raw pixel data left. The value for each pixel is an index into a RGB
palette which specifies the color. This is similiar to how BMPs and PCX
files work. How can I load the image and then set the palette then update
the screen for it to display? The palette is in a seperate file, btw.

Thanks.

2

At 17:49 13/06/2000 Tuesday, you wrote:

I am trying to write an SDL app that will load/view .SHP files. I wrote a
seperate app that reads the header and decompresses the file leaving just
the raw pixel data left. The value for each pixel is an index into a RGB
palette which specifies the color. This is similiar to how BMPs and PCX
files work.

8 bit bmp/pcx yes.

How can I load the image and then set the palette then update
the screen for it to display? The palette is in a seperate file, btw.

try this:

{
	// load image containing desired palette
	SDL_Surface *palSurface = IMG_Load( palFName );

	// set the screens palette if both are 8 bit.
	if ( screenSurface->format->BitsPerPixel==8 &&

palSurface->format->BitsPerPixel==8 ) {
SDL_Palette *pal = palSurface->format->palette;
SDL_SetColors( screenSurface, pal->colors, 0, pal->ncolors );
}

	SDL_FreeSurface(palSurface);
}

I just typed this up, so don't be too supprised if it doesn't compile. The

theory is what matters.

-dv