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![Amine Khaldi](/assets/img/avatar_default.png)
* Create a branch for some evul shell experiments. svn path=/branches/shell-experiments/; revision=61927
338 lines
10 KiB
C
338 lines
10 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 6.5
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*
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* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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*/
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/*
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* Render whole vertex buffers, including projection of vertices from
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* clip space and clipping of primitives.
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*
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* This file makes calls to project vertices and to the point, line
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* and triangle rasterizers via the function pointers:
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*
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* context->Driver.Render.*
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*
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*/
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#include <precomp.h>
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/**********************************************************************/
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/* Clip single primitives */
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/**********************************************************************/
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#define W(i) coord[i][3]
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#define Z(i) coord[i][2]
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#define Y(i) coord[i][1]
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#define X(i) coord[i][0]
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#define SIZE 4
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#define TAG(x) x##_4
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#include "t_vb_cliptmp.h"
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/**********************************************************************/
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/* Clip and render whole begin/end objects */
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/**********************************************************************/
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#define NEED_EDGEFLAG_SETUP (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL)
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#define EDGEFLAG_GET(idx) VB->EdgeFlag[idx]
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#define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val
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/* This does NOT include the CLIP_USER_BIT! */
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#define CLIPMASK (CLIP_FRUSTUM_BITS | CLIP_CULL_BIT)
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/* Vertices, with the possibility of clipping.
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*/
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#define RENDER_POINTS( start, count ) \
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tnl->Driver.Render.Points( ctx, start, count )
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#define RENDER_LINE( v1, v2 ) \
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do { \
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GLubyte c1 = mask[v1], c2 = mask[v2]; \
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GLubyte ormask = c1|c2; \
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if (!ormask) \
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LineFunc( ctx, v1, v2 ); \
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else if (!(c1 & c2 & CLIPMASK)) \
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clip_line_4( ctx, v1, v2, ormask ); \
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} while (0)
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#define RENDER_TRI( v1, v2, v3 ) \
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do { \
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GLubyte c1 = mask[v1], c2 = mask[v2], c3 = mask[v3]; \
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GLubyte ormask = c1|c2|c3; \
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if (!ormask) \
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TriangleFunc( ctx, v1, v2, v3 ); \
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else if (!(c1 & c2 & c3 & CLIPMASK)) \
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clip_tri_4( ctx, v1, v2, v3, ormask ); \
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} while (0)
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#define RENDER_QUAD( v1, v2, v3, v4 ) \
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do { \
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GLubyte c1 = mask[v1], c2 = mask[v2]; \
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GLubyte c3 = mask[v3], c4 = mask[v4]; \
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GLubyte ormask = c1|c2|c3|c4; \
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if (!ormask) \
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QuadFunc( ctx, v1, v2, v3, v4 ); \
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else if (!(c1 & c2 & c3 & c4 & CLIPMASK)) \
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clip_quad_4( ctx, v1, v2, v3, v4, ormask ); \
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} while (0)
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#define LOCAL_VARS \
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TNLcontext *tnl = TNL_CONTEXT(ctx); \
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struct vertex_buffer *VB = &tnl->vb; \
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const GLuint * const elt = VB->Elts; \
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const GLubyte *mask = VB->ClipMask; \
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const GLuint sz = VB->ClipPtr->size; \
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const tnl_line_func LineFunc = tnl->Driver.Render.Line; \
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const tnl_triangle_func TriangleFunc = tnl->Driver.Render.Triangle; \
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const tnl_quad_func QuadFunc = tnl->Driver.Render.Quad; \
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const GLboolean stipple = ctx->Line.StippleFlag; \
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(void) (LineFunc && TriangleFunc && QuadFunc); \
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(void) elt; (void) mask; (void) sz; (void) stipple;
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#define TAG(x) clip_##x##_verts
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#define INIT(x) tnl->Driver.Render.PrimitiveNotify( ctx, x )
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#define RESET_STIPPLE if (stipple) tnl->Driver.Render.ResetLineStipple( ctx )
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#define PRESERVE_VB_DEFS
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#include "t_vb_rendertmp.h"
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/* Elts, with the possibility of clipping.
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*/
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#undef ELT
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#undef TAG
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#define ELT(x) elt[x]
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#define TAG(x) clip_##x##_elts
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#include "t_vb_rendertmp.h"
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/* TODO: do this for all primitives, verts and elts:
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*/
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static void clip_elt_triangles( struct gl_context *ctx,
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GLuint start,
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GLuint count,
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GLuint flags )
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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tnl_render_func render_tris = tnl->Driver.Render.PrimTabElts[GL_TRIANGLES];
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struct vertex_buffer *VB = &tnl->vb;
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const GLuint * const elt = VB->Elts;
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GLubyte *mask = VB->ClipMask;
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GLuint last = count-2;
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GLuint j;
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(void) flags;
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tnl->Driver.Render.PrimitiveNotify( ctx, GL_TRIANGLES );
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for (j=start; j < last; j+=3 ) {
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GLubyte c1 = mask[elt[j]];
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GLubyte c2 = mask[elt[j+1]];
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GLubyte c3 = mask[elt[j+2]];
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GLubyte ormask = c1|c2|c3;
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if (ormask) {
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if (start < j)
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render_tris( ctx, start, j, 0 );
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if (!(c1&c2&c3&CLIPMASK))
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clip_tri_4( ctx, elt[j], elt[j+1], elt[j+2], ormask );
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start = j+3;
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}
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}
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if (start < j)
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render_tris( ctx, start, j, 0 );
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}
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/**********************************************************************/
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/* Render whole begin/end objects */
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/**********************************************************************/
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#define NEED_EDGEFLAG_SETUP (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL)
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#define EDGEFLAG_GET(idx) VB->EdgeFlag[idx]
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#define EDGEFLAG_SET(idx, val) VB->EdgeFlag[idx] = val
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/* Vertices, no clipping.
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*/
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#define RENDER_POINTS( start, count ) \
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tnl->Driver.Render.Points( ctx, start, count )
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#define RENDER_LINE( v1, v2 ) \
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LineFunc( ctx, v1, v2 )
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#define RENDER_TRI( v1, v2, v3 ) \
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TriangleFunc( ctx, v1, v2, v3 )
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#define RENDER_QUAD( v1, v2, v3, v4 ) \
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QuadFunc( ctx, v1, v2, v3, v4 )
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#define TAG(x) _tnl_##x##_verts
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#define LOCAL_VARS \
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TNLcontext *tnl = TNL_CONTEXT(ctx); \
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struct vertex_buffer *VB = &tnl->vb; \
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const GLuint * const elt = VB->Elts; \
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const tnl_line_func LineFunc = tnl->Driver.Render.Line; \
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const tnl_triangle_func TriangleFunc = tnl->Driver.Render.Triangle; \
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const tnl_quad_func QuadFunc = tnl->Driver.Render.Quad; \
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const GLboolean stipple = ctx->Line.StippleFlag; \
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(void) (LineFunc && TriangleFunc && QuadFunc); \
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(void) elt; (void) stipple
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#define RESET_STIPPLE if (stipple) tnl->Driver.Render.ResetLineStipple( ctx )
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#define INIT(x) tnl->Driver.Render.PrimitiveNotify( ctx, x )
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#define RENDER_TAB_QUALIFIER
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#define PRESERVE_VB_DEFS
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#include "t_vb_rendertmp.h"
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/* Elts, no clipping.
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*/
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#undef ELT
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#define TAG(x) _tnl_##x##_elts
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#define ELT(x) elt[x]
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#include "t_vb_rendertmp.h"
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/**********************************************************************/
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/* Helper functions for drivers */
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/**********************************************************************/
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void _tnl_RenderClippedPolygon( struct gl_context *ctx, const GLuint *elts, GLuint n )
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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struct vertex_buffer *VB = &tnl->vb;
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GLuint *tmp = VB->Elts;
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VB->Elts = (GLuint *)elts;
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tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END );
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VB->Elts = tmp;
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}
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void _tnl_RenderClippedLine( struct gl_context *ctx, GLuint ii, GLuint jj )
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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tnl->Driver.Render.Line( ctx, ii, jj );
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}
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/**********************************************************************/
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/* Clip and render whole vertex buffers */
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/**********************************************************************/
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static GLboolean run_render( struct gl_context *ctx,
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struct tnl_pipeline_stage *stage )
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{
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TNLcontext *tnl = TNL_CONTEXT(ctx);
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struct vertex_buffer *VB = &tnl->vb;
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tnl_render_func *tab;
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GLint pass = 0;
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/* Allow the drivers to lock before projected verts are built so
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* that window coordinates are guarenteed not to change before
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* rendering.
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*/
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ASSERT(tnl->Driver.Render.Start);
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tnl->Driver.Render.Start( ctx );
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ASSERT(tnl->Driver.Render.BuildVertices);
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ASSERT(tnl->Driver.Render.PrimitiveNotify);
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ASSERT(tnl->Driver.Render.Points);
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ASSERT(tnl->Driver.Render.Line);
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ASSERT(tnl->Driver.Render.Triangle);
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ASSERT(tnl->Driver.Render.Quad);
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ASSERT(tnl->Driver.Render.ResetLineStipple);
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ASSERT(tnl->Driver.Render.Interp);
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ASSERT(tnl->Driver.Render.CopyPV);
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ASSERT(tnl->Driver.Render.ClippedLine);
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ASSERT(tnl->Driver.Render.ClippedPolygon);
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ASSERT(tnl->Driver.Render.Finish);
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tnl->Driver.Render.BuildVertices( ctx, 0, VB->Count, ~0 );
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if (VB->ClipOrMask) {
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tab = VB->Elts ? clip_render_tab_elts : clip_render_tab_verts;
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clip_render_tab_elts[GL_TRIANGLES] = clip_elt_triangles;
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}
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else {
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tab = (VB->Elts ?
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tnl->Driver.Render.PrimTabElts :
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tnl->Driver.Render.PrimTabVerts);
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}
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do
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{
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GLuint i;
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for (i = 0 ; i < VB->PrimitiveCount ; i++)
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{
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GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
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GLuint start = VB->Primitive[i].start;
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GLuint length = VB->Primitive[i].count;
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assert((prim & PRIM_MODE_MASK) <= GL_POLYGON);
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if (MESA_VERBOSE & VERBOSE_PRIMS)
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_mesa_debug(NULL, "MESA prim %s %d..%d\n",
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_mesa_lookup_enum_by_nr(prim & PRIM_MODE_MASK),
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start, start+length);
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if (length)
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tab[prim & PRIM_MODE_MASK]( ctx, start, start + length, prim );
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}
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} while (tnl->Driver.Render.Multipass &&
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tnl->Driver.Render.Multipass( ctx, ++pass ));
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tnl->Driver.Render.Finish( ctx );
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return GL_FALSE; /* finished the pipe */
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}
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/**********************************************************************/
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/* Render pipeline stage */
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/**********************************************************************/
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const struct tnl_pipeline_stage _tnl_render_stage =
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{
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"render", /* name */
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NULL, /* private data */
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NULL, /* creator */
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NULL, /* destructor */
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NULL, /* validate */
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run_render /* run */
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};
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