WebSVN - shark - Rev 1618 - /shark/branches/xen/ports/mesa/src/swrastst/ss

/* $Id: ss_triangle.c,v 1.1 2003-04-29 12:46:51 giacomo Exp $ */

/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
*
* 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
* BRIAN PAUL 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.
*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
*/

#include "glheader.h"
#include "colormac.h"
#include "macros.h"
#include "mtypes.h"

#include "tnl/t_context.h"

#include "ss_triangle.h"
#include "ss_context.h"

#define SS_RGBA_BIT 0x1
#define SS_OFFSET_BIT 0x2
#define SS_TWOSIDE_BIT 0x4
#define SS_UNFILLED_BIT 0x8
#define SS_MAX_TRIFUNC 0x10

static triangle_func tri_tab[SS_MAX_TRIFUNC];
static quad_func quad_tab[SS_MAX_TRIFUNC];

static void _swsetup_render_line_tri( GLcontext *ctx,
GLuint e0, GLuint e1, GLuint e2,
GLuint facing )
{
SScontext *swsetup = SWSETUP_CONTEXT(ctx);
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
GLubyte *ef = VB->EdgeFlag;
SWvertex *verts = swsetup->verts;
SWvertex *v0 = &verts[e0];
SWvertex *v1 = &verts[e1];
SWvertex *v2 = &verts[e2];
GLchan c[2][4];
GLchan s[2][4];
GLuint i[2];

/* cull testing */
if (ctx->Polygon.CullFlag) {
if (facing == 1 && ctx->Polygon.CullFaceMode != GL_FRONT)
return;
if (facing == 0 && ctx->Polygon.CullFaceMode != GL_BACK)
return;
}

if (ctx->_TriangleCaps & DD_FLATSHADE) {
COPY_CHAN4(c[0], v0->color);
COPY_CHAN4(c[1], v1->color);
COPY_CHAN4(s[0], v0->specular);
COPY_CHAN4(s[1], v1->specular);
i[0] = v0->index;
i[1] = v1->index;

COPY_CHAN4(v0->color, v2->color);
COPY_CHAN4(v1->color, v2->color);
COPY_CHAN4(v0->specular, v2->specular);
COPY_CHAN4(v1->specular, v2->specular);
v0->index = v2->index;
v1->index = v2->index;
}

if (swsetup->render_prim == GL_POLYGON) {
if (ef[e2]) _swrast_Line( ctx, v2, v0 );
if (ef[e0]) _swrast_Line( ctx, v0, v1 );
if (ef[e1]) _swrast_Line( ctx, v1, v2 );
} else {
if (ef[e0]) _swrast_Line( ctx, v0, v1 );
if (ef[e1]) _swrast_Line( ctx, v1, v2 );
if (ef[e2]) _swrast_Line( ctx, v2, v0 );
}

if (ctx->_TriangleCaps & DD_FLATSHADE) {
COPY_CHAN4(v0->color, c[0]);
COPY_CHAN4(v1->color, c[1]);
COPY_CHAN4(v0->specular, s[0]);
COPY_CHAN4(v1->specular, s[1]);
v0->index = i[0];
v1->index = i[1];
}
}

static void _swsetup_render_point_tri( GLcontext *ctx,
GLuint e0, GLuint e1, GLuint e2,
GLuint facing )
{
SScontext *swsetup = SWSETUP_CONTEXT(ctx);
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
GLubyte *ef = VB->EdgeFlag;
SWvertex *verts = swsetup->verts;
SWvertex *v0 = &verts[e0];
SWvertex *v1 = &verts[e1];
SWvertex *v2 = &verts[e2];
GLchan c[2][4];
GLchan s[2][4];
GLuint i[2];

/* cull testing */
if (ctx->Polygon.CullFlag) {
if (facing == 1 && ctx->Polygon.CullFaceMode != GL_FRONT)
return;
if (facing == 0 && ctx->Polygon.CullFaceMode != GL_BACK)
return;
}

if (ctx->_TriangleCaps & DD_FLATSHADE) {
COPY_CHAN4(c[0], v0->color);
COPY_CHAN4(c[1], v1->color);
COPY_CHAN4(s[0], v0->specular);
COPY_CHAN4(s[1], v1->specular);
i[0] = v0->index;
i[1] = v1->index;

COPY_CHAN4(v0->color, v2->color);
COPY_CHAN4(v1->color, v2->color);
COPY_CHAN4(v0->specular, v2->specular);
COPY_CHAN4(v1->specular, v2->specular);
v0->index = v2->index;
v1->index = v2->index;
}

if (ef[e0]) _swrast_Point( ctx, v0 );
if (ef[e1]) _swrast_Point( ctx, v1 );
if (ef[e2]) _swrast_Point( ctx, v2 );

if (ctx->_TriangleCaps & DD_FLATSHADE) {
COPY_CHAN4(v0->color, c[0]);
COPY_CHAN4(v1->color, c[1]);
COPY_CHAN4(v0->specular, s[0]);
COPY_CHAN4(v1->specular, s[1]);
v0->index = i[0];
v1->index = i[1];
}
_swrast_flush(ctx);
}

#define SS_COLOR(a,b) COPY_CHAN4(a,b)
#define SS_SPEC(a,b) COPY_3V(a,b)
#define SS_IND(a,b) (a = b)

#define IND (0)
#define TAG(x) x
#include "ss_tritmp.h"

#define IND (SS_OFFSET_BIT)
#define TAG(x) x##_offset
#include "ss_tritmp.h"

#define IND (SS_TWOSIDE_BIT)
#define TAG(x) x##_twoside
#include "ss_tritmp.h"

#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT)
#define TAG(x) x##_offset_twoside
#include "ss_tritmp.h"

#define IND (SS_UNFILLED_BIT)
#define TAG(x) x##_unfilled
#include "ss_tritmp.h"

#define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT)
#define TAG(x) x##_offset_unfilled
#include "ss_tritmp.h"

#define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
#define TAG(x) x##_twoside_unfilled
#include "ss_tritmp.h"

#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
#define TAG(x) x##_offset_twoside_unfilled
#include "ss_tritmp.h"

#define IND (0|SS_RGBA_BIT)
#define TAG(x) x##_rgba
#include "ss_tritmp.h"

#define IND (SS_OFFSET_BIT|SS_RGBA_BIT)
#define TAG(x) x##_offset_rgba
#include "ss_tritmp.h"

#define IND (SS_TWOSIDE_BIT|SS_RGBA_BIT)
#define TAG(x) x##_twoside_rgba
#include "ss_tritmp.h"

#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_RGBA_BIT)
#define TAG(x) x##_offset_twoside_rgba
#include "ss_tritmp.h"

#define IND (SS_UNFILLED_BIT|SS_RGBA_BIT)
#define TAG(x) x##_unfilled_rgba
#include "ss_tritmp.h"

#define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
#define TAG(x) x##_offset_unfilled_rgba
#include "ss_tritmp.h"

#define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
#define TAG(x) x##_twoside_unfilled_rgba
#include "ss_tritmp.h"

#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT|SS_RGBA_BIT)
#define TAG(x) x##_offset_twoside_unfilled_rgba
#include "ss_tritmp.h"

void _swsetup_trifuncs_init( GLcontext *ctx )
{
(void) ctx;

init();
init_offset();
init_twoside();
init_offset_twoside();
init_unfilled();
init_offset_unfilled();
init_twoside_unfilled();
init_offset_twoside_unfilled();

init_rgba();
init_offset_rgba();
init_twoside_rgba();
init_offset_twoside_rgba();
init_unfilled_rgba();
init_offset_unfilled_rgba();
init_twoside_unfilled_rgba();
init_offset_twoside_unfilled_rgba();
}

static void swsetup_points( GLcontext *ctx, GLuint first, GLuint last )
{
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts;
GLuint i;

if (VB->Elts) {
for (i = first; i < last; i++)
if (VB->ClipMask[VB->Elts[i]] == 0)
_swrast_Point( ctx, &verts[VB->Elts[i]] );
}
else {
for (i = first; i < last; i++)
if (VB->ClipMask[i] == 0)
_swrast_Point( ctx, &verts[i] );
}
}

static void swsetup_line( GLcontext *ctx, GLuint v0, GLuint v1 )
{
SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts;
_swrast_Line( ctx, &verts[v0], &verts[v1] );
}

void _swsetup_choose_trifuncs( GLcontext *ctx )
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
GLuint ind = 0;

if (ctx->Polygon.OffsetPoint ||
ctx->Polygon.OffsetLine ||
ctx->Polygon.OffsetFill)
ind |= SS_OFFSET_BIT;

if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
ind |= SS_TWOSIDE_BIT;

/* We piggyback the two-sided stencil front/back determination on the
* unfilled triangle path.
*/
if ((ctx->_TriangleCaps & DD_TRI_UNFILLED) ||
(ctx->Stencil.Enabled && ctx->Stencil.TestTwoSide))
ind |= SS_UNFILLED_BIT;

if (ctx->Visual.rgbMode)
ind |= SS_RGBA_BIT;

tnl->Driver.Render.Triangle = tri_tab[ind];
tnl->Driver.Render.Quad = quad_tab[ind];
tnl->Driver.Render.Line = swsetup_line;
tnl->Driver.Render.Points = swsetup_points;

ctx->_Facing = 0;
}

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(root)/shark/branches/xen/ports/mesa/src/swrastst/ss_triangle.c @ 1688 - Rev 1618