mirror of
https://github.com/reactos/reactos.git
synced 2025-02-24 17:34:57 +00:00
337 lines
10 KiB
C
337 lines
10 KiB
C
/*
|
|
* Mesa 3-D graphics library
|
|
* Version: 6.5
|
|
*
|
|
* Copyright (C) 1999-2005 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>
|
|
*/
|
|
|
|
|
|
/*
|
|
* Render whole vertex buffers, including projection of vertices from
|
|
* clip space and clipping of primitives.
|
|
*
|
|
* This file makes calls to project vertices and to the point, line
|
|
* and triangle rasterizers via the function pointers:
|
|
*
|
|
* context->Driver.Render.*
|
|
*
|
|
*/
|
|
|
|
#include <precomp.h>
|
|
|
|
/**********************************************************************/
|
|
/* Clip single primitives */
|
|
/**********************************************************************/
|
|
|
|
|
|
#define W(i) coord[i][3]
|
|
#define Z(i) coord[i][2]
|
|
#define Y(i) coord[i][1]
|
|
#define X(i) coord[i][0]
|
|
#define SIZE 4
|
|
#define TAG(x) x##_4
|
|
#include "t_vb_cliptmp.h"
|
|
|
|
|
|
|
|
/**********************************************************************/
|
|
/* Clip and render whole begin/end objects */
|
|
/**********************************************************************/
|
|
|
|
#define NEED_EDGEFLAG_SETUP (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL)
|
|
#define EDGEFLAG_GET(idx) VB->EdgeFlag[idx]
|
|
#define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val
|
|
|
|
|
|
/* This does NOT include the CLIP_USER_BIT! */
|
|
#define CLIPMASK (CLIP_FRUSTUM_BITS | CLIP_CULL_BIT)
|
|
|
|
|
|
/* Vertices, with the possibility of clipping.
|
|
*/
|
|
#define RENDER_POINTS( start, count ) \
|
|
tnl->Driver.Render.Points( ctx, start, count )
|
|
|
|
#define RENDER_LINE( v1, v2 ) \
|
|
do { \
|
|
GLubyte c1 = mask[v1], c2 = mask[v2]; \
|
|
GLubyte ormask = c1|c2; \
|
|
if (!ormask) \
|
|
LineFunc( ctx, v1, v2 ); \
|
|
else if (!(c1 & c2 & CLIPMASK)) \
|
|
clip_line_4( ctx, v1, v2, ormask ); \
|
|
} while (0)
|
|
|
|
#define RENDER_TRI( v1, v2, v3 ) \
|
|
do { \
|
|
GLubyte c1 = mask[v1], c2 = mask[v2], c3 = mask[v3]; \
|
|
GLubyte ormask = c1|c2|c3; \
|
|
if (!ormask) \
|
|
TriangleFunc( ctx, v1, v2, v3 ); \
|
|
else if (!(c1 & c2 & c3 & CLIPMASK)) \
|
|
clip_tri_4( ctx, v1, v2, v3, ormask ); \
|
|
} while (0)
|
|
|
|
#define RENDER_QUAD( v1, v2, v3, v4 ) \
|
|
do { \
|
|
GLubyte c1 = mask[v1], c2 = mask[v2]; \
|
|
GLubyte c3 = mask[v3], c4 = mask[v4]; \
|
|
GLubyte ormask = c1|c2|c3|c4; \
|
|
if (!ormask) \
|
|
QuadFunc( ctx, v1, v2, v3, v4 ); \
|
|
else if (!(c1 & c2 & c3 & c4 & CLIPMASK)) \
|
|
clip_quad_4( ctx, v1, v2, v3, v4, ormask ); \
|
|
} while (0)
|
|
|
|
|
|
#define LOCAL_VARS \
|
|
TNLcontext *tnl = TNL_CONTEXT(ctx); \
|
|
struct vertex_buffer *VB = &tnl->vb; \
|
|
const GLuint * const elt = VB->Elts; \
|
|
const GLubyte *mask = VB->ClipMask; \
|
|
const GLuint sz = VB->ClipPtr->size; \
|
|
const tnl_line_func LineFunc = tnl->Driver.Render.Line; \
|
|
const tnl_triangle_func TriangleFunc = tnl->Driver.Render.Triangle; \
|
|
const tnl_quad_func QuadFunc = tnl->Driver.Render.Quad; \
|
|
const GLboolean stipple = ctx->Line.StippleFlag; \
|
|
(void) (LineFunc && TriangleFunc && QuadFunc); \
|
|
(void) elt; (void) mask; (void) sz; (void) stipple;
|
|
|
|
#define TAG(x) clip_##x##_verts
|
|
#define INIT(x) tnl->Driver.Render.PrimitiveNotify( ctx, x )
|
|
#define RESET_STIPPLE if (stipple) tnl->Driver.Render.ResetLineStipple( ctx )
|
|
#define PRESERVE_VB_DEFS
|
|
#include "t_vb_rendertmp.h"
|
|
|
|
|
|
|
|
/* Elts, with the possibility of clipping.
|
|
*/
|
|
#undef ELT
|
|
#undef TAG
|
|
#define ELT(x) elt[x]
|
|
#define TAG(x) clip_##x##_elts
|
|
#include "t_vb_rendertmp.h"
|
|
|
|
/* TODO: do this for all primitives, verts and elts:
|
|
*/
|
|
static void clip_elt_triangles( struct gl_context *ctx,
|
|
GLuint start,
|
|
GLuint count,
|
|
GLuint flags )
|
|
{
|
|
TNLcontext *tnl = TNL_CONTEXT(ctx);
|
|
tnl_render_func render_tris = tnl->Driver.Render.PrimTabElts[GL_TRIANGLES];
|
|
struct vertex_buffer *VB = &tnl->vb;
|
|
const GLuint * const elt = VB->Elts;
|
|
GLubyte *mask = VB->ClipMask;
|
|
GLuint last = count-2;
|
|
GLuint j;
|
|
(void) flags;
|
|
|
|
tnl->Driver.Render.PrimitiveNotify( ctx, GL_TRIANGLES );
|
|
|
|
for (j=start; j < last; j+=3 ) {
|
|
GLubyte c1 = mask[elt[j]];
|
|
GLubyte c2 = mask[elt[j+1]];
|
|
GLubyte c3 = mask[elt[j+2]];
|
|
GLubyte ormask = c1|c2|c3;
|
|
if (ormask) {
|
|
if (start < j)
|
|
render_tris( ctx, start, j, 0 );
|
|
if (!(c1&c2&c3&CLIPMASK))
|
|
clip_tri_4( ctx, elt[j], elt[j+1], elt[j+2], ormask );
|
|
start = j+3;
|
|
}
|
|
}
|
|
|
|
if (start < j)
|
|
render_tris( ctx, start, j, 0 );
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* Render whole begin/end objects */
|
|
/**********************************************************************/
|
|
|
|
#define NEED_EDGEFLAG_SETUP (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL)
|
|
#define EDGEFLAG_GET(idx) VB->EdgeFlag[idx]
|
|
#define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val
|
|
|
|
|
|
/* Vertices, no clipping.
|
|
*/
|
|
#define RENDER_POINTS( start, count ) \
|
|
tnl->Driver.Render.Points( ctx, start, count )
|
|
|
|
#define RENDER_LINE( v1, v2 ) \
|
|
LineFunc( ctx, v1, v2 )
|
|
|
|
#define RENDER_TRI( v1, v2, v3 ) \
|
|
TriangleFunc( ctx, v1, v2, v3 )
|
|
|
|
#define RENDER_QUAD( v1, v2, v3, v4 ) \
|
|
QuadFunc( ctx, v1, v2, v3, v4 )
|
|
|
|
#define TAG(x) _tnl_##x##_verts
|
|
|
|
#define LOCAL_VARS \
|
|
TNLcontext *tnl = TNL_CONTEXT(ctx); \
|
|
struct vertex_buffer *VB = &tnl->vb; \
|
|
const GLuint * const elt = VB->Elts; \
|
|
const tnl_line_func LineFunc = tnl->Driver.Render.Line; \
|
|
const tnl_triangle_func TriangleFunc = tnl->Driver.Render.Triangle; \
|
|
const tnl_quad_func QuadFunc = tnl->Driver.Render.Quad; \
|
|
const GLboolean stipple = ctx->Line.StippleFlag; \
|
|
(void) (LineFunc && TriangleFunc && QuadFunc); \
|
|
(void) elt; (void) stipple
|
|
|
|
#define RESET_STIPPLE if (stipple) tnl->Driver.Render.ResetLineStipple( ctx )
|
|
#define INIT(x) tnl->Driver.Render.PrimitiveNotify( ctx, x )
|
|
#define RENDER_TAB_QUALIFIER
|
|
#define PRESERVE_VB_DEFS
|
|
#include "t_vb_rendertmp.h"
|
|
|
|
|
|
/* Elts, no clipping.
|
|
*/
|
|
#undef ELT
|
|
#define TAG(x) _tnl_##x##_elts
|
|
#define ELT(x) elt[x]
|
|
#include "t_vb_rendertmp.h"
|
|
|
|
|
|
/**********************************************************************/
|
|
/* Helper functions for drivers */
|
|
/**********************************************************************/
|
|
|
|
void _tnl_RenderClippedPolygon( struct gl_context *ctx, const GLuint *elts, GLuint n )
|
|
{
|
|
TNLcontext *tnl = TNL_CONTEXT(ctx);
|
|
struct vertex_buffer *VB = &tnl->vb;
|
|
GLuint *tmp = VB->Elts;
|
|
|
|
VB->Elts = (GLuint *)elts;
|
|
tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END );
|
|
VB->Elts = tmp;
|
|
}
|
|
|
|
void _tnl_RenderClippedLine( struct gl_context *ctx, GLuint ii, GLuint jj )
|
|
{
|
|
TNLcontext *tnl = TNL_CONTEXT(ctx);
|
|
tnl->Driver.Render.Line( ctx, ii, jj );
|
|
}
|
|
|
|
|
|
|
|
/**********************************************************************/
|
|
/* Clip and render whole vertex buffers */
|
|
/**********************************************************************/
|
|
|
|
|
|
static GLboolean run_render( struct gl_context *ctx,
|
|
struct tnl_pipeline_stage *stage )
|
|
{
|
|
TNLcontext *tnl = TNL_CONTEXT(ctx);
|
|
struct vertex_buffer *VB = &tnl->vb;
|
|
tnl_render_func *tab;
|
|
GLint pass = 0;
|
|
|
|
/* Allow the drivers to lock before projected verts are built so
|
|
* that window coordinates are guarenteed not to change before
|
|
* rendering.
|
|
*/
|
|
ASSERT(tnl->Driver.Render.Start);
|
|
|
|
tnl->Driver.Render.Start( ctx );
|
|
|
|
ASSERT(tnl->Driver.Render.BuildVertices);
|
|
ASSERT(tnl->Driver.Render.PrimitiveNotify);
|
|
ASSERT(tnl->Driver.Render.Points);
|
|
ASSERT(tnl->Driver.Render.Line);
|
|
ASSERT(tnl->Driver.Render.Triangle);
|
|
ASSERT(tnl->Driver.Render.Quad);
|
|
ASSERT(tnl->Driver.Render.ResetLineStipple);
|
|
ASSERT(tnl->Driver.Render.Interp);
|
|
ASSERT(tnl->Driver.Render.CopyPV);
|
|
ASSERT(tnl->Driver.Render.ClippedLine);
|
|
ASSERT(tnl->Driver.Render.ClippedPolygon);
|
|
ASSERT(tnl->Driver.Render.Finish);
|
|
|
|
tnl->Driver.Render.BuildVertices( ctx, 0, VB->Count, ~0 );
|
|
|
|
if (VB->ClipOrMask) {
|
|
tab = VB->Elts ? clip_render_tab_elts : clip_render_tab_verts;
|
|
clip_render_tab_elts[GL_TRIANGLES] = clip_elt_triangles;
|
|
}
|
|
else {
|
|
tab = (VB->Elts ?
|
|
tnl->Driver.Render.PrimTabElts :
|
|
tnl->Driver.Render.PrimTabVerts);
|
|
}
|
|
|
|
do
|
|
{
|
|
GLuint i;
|
|
|
|
for (i = 0 ; i < VB->PrimitiveCount ; i++)
|
|
{
|
|
GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
|
|
GLuint start = VB->Primitive[i].start;
|
|
GLuint length = VB->Primitive[i].count;
|
|
|
|
assert((prim & PRIM_MODE_MASK) <= GL_POLYGON);
|
|
|
|
if (MESA_VERBOSE & VERBOSE_PRIMS)
|
|
_mesa_debug(NULL, "MESA prim %s %d..%d\n",
|
|
_mesa_lookup_enum_by_nr(prim & PRIM_MODE_MASK),
|
|
start, start+length);
|
|
|
|
if (length)
|
|
tab[prim & PRIM_MODE_MASK]( ctx, start, start + length, prim );
|
|
}
|
|
} while (tnl->Driver.Render.Multipass &&
|
|
tnl->Driver.Render.Multipass( ctx, ++pass ));
|
|
|
|
tnl->Driver.Render.Finish( ctx );
|
|
|
|
return GL_FALSE; /* finished the pipe */
|
|
}
|
|
|
|
|
|
/**********************************************************************/
|
|
/* Render pipeline stage */
|
|
/**********************************************************************/
|
|
|
|
|
|
|
|
|
|
|
|
const struct tnl_pipeline_stage _tnl_render_stage =
|
|
{
|
|
"render", /* name */
|
|
NULL, /* private data */
|
|
NULL, /* creator */
|
|
NULL, /* destructor */
|
|
NULL, /* validate */
|
|
run_render /* run */
|
|
};
|