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/* $XFree86: xc/lib/GL/mesa/src/drv/ffb/ffb_lines.c,v 1.2 2002/02/22 21:32:58 dawes Exp $
*
* GLX Hardware Device Driver for Sun Creator/Creator3D
* Copyright (C) 2000, 2001 David S. Miller
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* DAVID MILLER, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*
* David S. Miller <davem@redhat.com>
*/
#include "mtypes.h"
#include "mm.h"
#include "ffb_dd.h"
#include "ffb_span.h"
#include "ffb_depth.h"
#include "ffb_context.h"
#include "ffb_vb.h"
#include "ffb_lines.h"
#include "ffb_tris.h"
#include "ffb_lock.h"
#include "extensions.h"
#undef FFB_LINE_TRACE
#define FFB_LINE_FLAT_BIT 0x01
#define FFB_LINE_ALPHA_BIT 0x02
#define MAX_FFB_LINE_FUNCS 0x04
static ffb_line_func ffb_line_tab[MAX_FFB_LINE_FUNCS];
/* If the line is not wide, we can support all of the line
* patterning and smooth shading features of OpenGL fully.
*/
#define IND (0)
#define TAG(x) x
#include "ffb_linetmp.h"
#define IND (FFB_LINE_FLAT_BIT)
#define TAG(x) x##_flat
#include "ffb_linetmp.h"
#define IND (FFB_LINE_ALPHA_BIT)
#define TAG(x) x##_alpha
#include "ffb_linetmp.h"
#define IND (FFB_LINE_ALPHA_BIT|FFB_LINE_FLAT_BIT)
#define TAG(x) x##_alpha_flat
#include "ffb_linetmp.h"
void ffbDDLinefuncInit(void)
{
init();
init_flat();
init_alpha();
init_alpha_flat();
}
static void ffb_dd_line( GLcontext *ctx, GLuint e0, GLuint e1 )
{
ffbContextPtr fmesa = FFB_CONTEXT(ctx);
ffb_vertex *v0 = &fmesa->verts[e0];
ffb_vertex *v1 = &fmesa->verts[e1];
fmesa->draw_line( ctx, v0, v1 );
}
void ffbChooseLineState(GLcontext *ctx)
{
ffbContextPtr fmesa = FFB_CONTEXT(ctx);
TNLcontext *tnl = TNL_CONTEXT(ctx);
GLuint flags = ctx->_TriangleCaps;
GLuint ind = 0;
tnl->Driver.Render.Line = ffb_dd_line;
if (flags & DD_FLATSHADE)
ind |= FFB_LINE_FLAT_BIT;
if ((flags & DD_LINE_STIPPLE) != 0 &&
fmesa->lpat == FFB_LPAT_BAD) {
fmesa->draw_line = ffb_fallback_line;
return;
}
/* If blending or the alpha test is enabled we need to
* provide alpha components to the chip, else we can
* do without it and thus feed vertex data to the chip
* more efficiently.
*/
if (ctx->Color.BlendEnabled || ctx->Color.AlphaEnabled)
ind |= FFB_LINE_ALPHA_BIT;
fmesa->draw_line = ffb_line_tab[ind];
}
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