r128_tex.h

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/* $XFree86: xc/lib/GL/mesa/src/drv/r128/r128_tex.h,v 1.7 2002/02/22 21:44:58 dawes Exp $ */
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Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
                                               Cedar Park, Texas.
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/*
 * Authors:
 *   Gareth Hughes <[e-mail]>
 *   Kevin E. Martin <[e-mail]>
 *
 */

#ifndef __R128_TEX_H__
#define __R128_TEX_H__

extern void r128UpdateTextureState( GLcontext *ctx );

extern void r128UploadTexImages( r128ContextPtr rmesa, r128TexObjPtr t );

extern void r128DestroyTexObj( r128ContextPtr rmesa, r128TexObjPtr t );

extern void r128InitTextureFuncs( struct dd_function_table *functions );


/* ================================================================
 * Color conversion macros:
 */

#define R128PACKCOLOR332( r, g, b )					\
   (((r) & 0xe0) | (((g) & 0xe0) >> 3) | (((b) & 0xc0) >> 6))

#define R128PACKCOLOR1555( r, g, b, a )					\
   ((((r) & 0xf8) << 7) | (((g) & 0xf8) << 2) | (((b) & 0xf8) >> 3) |	\
    ((a) ? 0x8000 : 0))

#define R128PACKCOLOR565( r, g, b )					\
   ((((r) & 0xf8) << 8) | (((g) & 0xfc) << 3) | (((b) & 0xf8) >> 3))

#define R128PACKCOLOR888( r, g, b )					\
   (((r) << 16) | ((g) << 8) | (b))

#define R128PACKCOLOR8888( r, g, b, a )					\
   (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))

#define R128PACKCOLOR4444( r, g, b, a )					\
   ((((a) & 0xf0) << 8) | (((r) & 0xf0) << 4) | ((g) & 0xf0) | ((b) >> 4))

static INLINE u_int32_t r128PackColor( GLuint cpp,
                                       GLubyte r, GLubyte g,
                                       GLubyte b, GLubyte a )
{
    switch ( cpp ) {
    case 2:
       return R128PACKCOLOR565( r, g, b );
    case 4:
       return R128PACKCOLOR8888( r, g, b, a );
    default:
       return 0;
    }
}

#endif /* __R128_TEX_H__ */