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/* |
* Mesa 3-D graphics library |
* |
* 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 |
* THE AUTHORS OR COPYRIGHT HOLDERS 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> |
*/ |
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/* |
* 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.* |
* |
*/ |
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#include "main/glheader.h" |
#include "main/context.h" |
#include "main/enums.h" |
#include "main/macros.h" |
#include "main/imports.h" |
#include "main/mtypes.h" |
#include "math/m_xform.h" |
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#include "t_pipeline.h" |
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/**********************************************************************/ |
/* Clip single primitives */ |
/**********************************************************************/ |
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#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" |
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/**********************************************************************/ |
/* Clip and render whole begin/end objects */ |
/**********************************************************************/ |
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#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 |
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/* This does NOT include the CLIP_USER_BIT! */ |
#define CLIPMASK (CLIP_FRUSTUM_BITS | CLIP_CULL_BIT) |
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/* Vertices, with the possibility of clipping. |
*/ |
#define RENDER_POINTS( start, count ) \ |
tnl->Driver.Render.Points( ctx, start, count ) |
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#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) |
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#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) |
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#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) |
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#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; |
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#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" |
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/* 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" |
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/* 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; |
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tnl->Driver.Render.PrimitiveNotify( ctx, GL_TRIANGLES ); |
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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; |
} |
} |
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if (start < j) |
render_tris( ctx, start, j, 0 ); |
} |
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/**********************************************************************/ |
/* Render whole begin/end objects */ |
/**********************************************************************/ |
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#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 |
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/* Vertices, no clipping. |
*/ |
#define RENDER_POINTS( start, count ) \ |
tnl->Driver.Render.Points( ctx, start, count ) |
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#define RENDER_LINE( v1, v2 ) \ |
LineFunc( ctx, v1, v2 ) |
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#define RENDER_TRI( v1, v2, v3 ) \ |
TriangleFunc( ctx, v1, v2, v3 ) |
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#define RENDER_QUAD( v1, v2, v3, v4 ) \ |
QuadFunc( ctx, v1, v2, v3, v4 ) |
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#define TAG(x) _tnl_##x##_verts |
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#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 |
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#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" |
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/* Elts, no clipping. |
*/ |
#undef ELT |
#define TAG(x) _tnl_##x##_elts |
#define ELT(x) elt[x] |
#include "t_vb_rendertmp.h" |
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/**********************************************************************/ |
/* Helper functions for drivers */ |
/**********************************************************************/ |
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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; |
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VB->Elts = (GLuint *)elts; |
tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END ); |
VB->Elts = tmp; |
} |
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void _tnl_RenderClippedLine( struct gl_context *ctx, GLuint ii, GLuint jj ) |
{ |
TNLcontext *tnl = TNL_CONTEXT(ctx); |
tnl->Driver.Render.Line( ctx, ii, jj ); |
} |
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/**********************************************************************/ |
/* Clip and render whole vertex buffers */ |
/**********************************************************************/ |
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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; |
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/* 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); |
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tnl->Driver.Render.Start( ctx ); |
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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); |
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tnl->Driver.Render.BuildVertices( ctx, 0, VB->Count, ~0 ); |
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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); |
} |
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do |
{ |
GLuint i; |
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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; |
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assert((prim & PRIM_MODE_MASK) <= GL_POLYGON); |
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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); |
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if (length) |
tab[prim & PRIM_MODE_MASK]( ctx, start, start + length, prim ); |
} |
} while (tnl->Driver.Render.Multipass && |
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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/**********************************************************************/ |
/* Render pipeline stage */ |
/**********************************************************************/ |
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const struct tnl_pipeline_stage _tnl_render_stage = |
{ |
"render", /* name */ |
NULL, /* private data */ |
NULL, /* creator */ |
NULL, /* destructor */ |
NULL, /* validate */ |
run_render /* run */ |
}; |