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<title>SGE Documentation - Color</title>
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<H1>Color manipulation</H1>
<P>
<UL>
<LI><A HREF="#sge_MapAlpha">sge_MapAlpha</A>
<LI><A HREF="#sge_FillPaletteEntry">sge_FillPaletteEntry</A>
<LI><A HREF="#sge_GetRGB">sge_GetRGB</A>
<LI><A HREF="#sge_Fader">sge_Fader</A>
<LI><A HREF="#sge_AlphaFader">sge_AlphaFader</A>
<LI><A HREF="#sge_SetupRainbowPalette">sge_SetupRainbowPalette</A>
<LI><A HREF="#sge_SetupBWPalette">sge_SetupBWPalette</A>
</UL>
<B>Uint32 <a name="sge_MapAlpha">sge_MapAlpha</a>(Uint8 R, Uint8 G, Uint8 B, Uint8 A)</B><BR>
Use this function to map Uint32 color values (RGBA) for *32bit* alpha surfaces. The color value can then be used with any of SGEs functions.<BR><BR>
<B>SDL_Color <a name="sge_FillPaletteEntry">sge_FillPaletteEntry</a>(Uint8 R, Uint8 G, Uint8 B)</B><BR>
Fills a palette entry (SDL_Color) with R, G, B components.<BR><BR>
<B>SDL_Color <a name="sge_GetRGB">sge_GetRGB</a>(SDL_Surface *Surface, Uint32 Color)</B><BR>
Get the RGB of a color value.<BR><BR>
<B>void <a name="sge_Fader">sge_Fader</a>(SDL_Surface *Surface, Uint8 sR,Uint8 sG,Uint8 sB, Uint8 dR,Uint8 dG,Uint8 dB,Uint32 *ctab,int start, int stop)</B><BR>
Fades from (sR,sG,sB) to (dR,dG,dB), puts result (32-bit pixel format) in ctab[start] to ctab[stop].<BR><BR>
<B>void <a name="sge_AlphaFader">sge_AlphaFader</a>(Uint8 sR,Uint8 sG,Uint8 sB,Uint8 sA, Uint8 dR,Uint8 dG,Uint8 dB,Uint8 dA, Uint32 *ctab,int start, int stop)</B><BR>
Fades from (sR,sG,sB,sA) to (dR,dG,dB,dA), puts result (32-bit alpha pixel format) in ctab[start] to ctab[stop].<BR><BR>
<B>void <a name="sge_SetupRainbowPalette">sge_SetupRainbowPalette</a>(SDL_Surface *Surface,Uint32 *ctab,int intensity, int start, int stop)</B><BR>
Copies a nice rainbow palette to the color table (ctab[start] to ctab[stop]). You must also set the intensity of the palette (0-bright 255-dark)<BR><BR>
<B>void <a name="sge_SetupBWPalette">sge_SetupBWPalette</a>(SDL_Surface *Surface,Uint32 *ctab,int start, int stop)</B><BR>
Copies a B&W palette to the color table (ctab[start] to ctab[stop]).<BR><BR>
</P>
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<P><I><SMALL>
Copyright © 1999-2001 Anders Lindstrm<BR>
Last updated 010218
</SMALL></I></P>
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