From 5df82c82bd53db90eb72c5aad4dd20cf6f1116b1 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Fri, 22 Aug 2003 20:11:43 +0000 Subject: patch to import Jon Smirl's work from Bitkeeper --- src/mesa/tnl_dd/t_dd_dmatmp.h | 1105 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1105 insertions(+) create mode 100644 src/mesa/tnl_dd/t_dd_dmatmp.h (limited to 'src/mesa/tnl_dd/t_dd_dmatmp.h') diff --git a/src/mesa/tnl_dd/t_dd_dmatmp.h b/src/mesa/tnl_dd/t_dd_dmatmp.h new file mode 100644 index 0000000000..d9f709389d --- /dev/null +++ b/src/mesa/tnl_dd/t_dd_dmatmp.h @@ -0,0 +1,1105 @@ + +/* + * 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 + */ + + +/* Template for render stages which build and emit vertices directly + * to fixed-size dma buffers. Useful for rendering strips and other + * native primitives where clipping and per-vertex tweaks such as + * those in t_dd_tritmp.h are not required. + * + * Produces code for both inline triangles and indexed triangles. + * Where various primitive types are unaccelerated by hardware, the + * code attempts to fallback to other primitive types (quadstrips to + * tristrips, lineloops to linestrips), or to indexed vertices. + * Ultimately, a FALLBACK() macro is invoked if there is no way to + * render the primitive natively. + */ + +#if !defined(HAVE_TRIANGLES) +#error "must have at least triangles to use render template" +#endif + +#if !HAVE_ELTS +#define ELTS_VARS +#define ALLOC_ELTS( nr ) +#define EMIT_ELT( offset, elt ) +#define EMIT_TWO_ELTS( offset, elt0, elt1 ) +#define INCR_ELTS( nr ) +#define ELT_INIT(prim) +#define GET_CURRENT_VB_MAX_ELTS() 0 +#define GET_SUBSEQUENT_VB_MAX_ELTS() 0 +#define ALLOC_ELTS_NEW_PRIMITIVE(nr) +#define RELEASE_ELT_VERTS() +#define EMIT_INDEXED_VERTS( ctx, start, count ) +#endif + +#ifndef EMIT_TWO_ELTS +#define EMIT_TWO_ELTS( offset, elt0, elt1 ) \ +do { \ + EMIT_ELT( offset, elt0 ); \ + EMIT_ELT( offset+1, elt1 ); \ +} while (0) +#endif + +#ifndef FINISH +#define FINISH +#endif + +/**********************************************************************/ +/* Render whole begin/end objects */ +/**********************************************************************/ + + + +static GLboolean TAG(emit_elt_verts)( GLcontext *ctx, + GLuint start, GLuint count ) +{ + if (HAVE_ELTS) { + LOCAL_VARS; + GLuint nr = count - start; + + if ( nr >= GET_SUBSEQUENT_VB_MAX_VERTS() ) /* assumes same packing for + * indexed and regualar verts + */ + return GL_FALSE; + + NEW_PRIMITIVE(); /* finish last prim */ + EMIT_INDEXED_VERTS( ctx, start, count ); + return GL_TRUE; + } else { + return GL_FALSE; + } +} + +#if (HAVE_ELTS) +static void TAG(emit_elts)( GLcontext *ctx, GLuint *elts, GLuint nr ) +{ + GLint i; + LOCAL_VARS; + ELTS_VARS; + + ALLOC_ELTS( nr ); + + for ( i = 0 ; i < nr ; i+=2, elts += 2 ) { + EMIT_TWO_ELTS( 0, elts[0], elts[1] ); + INCR_ELTS( 2 ); + } +} +#endif + + +/*********************************************************************** + * Render non-indexed primitives. + ***********************************************************************/ + + + +static void TAG(render_points_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_POINTS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz = GET_CURRENT_VB_MAX_VERTS(); + GLuint j, nr; + + INIT( GL_POINTS ); + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr ) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + + FINISH; + + } else { + VERT_FALLBACK( ctx, start, count, flags ); + } +} + +static void TAG(render_lines_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_LINES) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz = GET_CURRENT_VB_MAX_VERTS(); + GLuint j, nr; + + INIT( GL_LINES ); + + /* Emit whole number of lines in total and in each buffer: + */ + count -= (count-start) & 1; + currentsz -= currentsz & 1; + dmasz -= dmasz & 1; + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr ) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + + FINISH; + + } else { + VERT_FALLBACK( ctx, start, count, flags ); + } +} + + +static void TAG(render_line_strip_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_LINE_STRIPS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz = GET_CURRENT_VB_MAX_VERTS(); + GLuint j, nr; + + NEW_PRIMITIVE(); /* always a new primitive */ + INIT( GL_LINE_STRIP ); + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + + FINISH; + + } else { + VERT_FALLBACK( ctx, start, count, flags ); + } +} + + +static void TAG(render_line_loop_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_LINE_STRIPS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz = GET_CURRENT_VB_MAX_VERTS(); + GLuint j, nr; + + NEW_PRIMITIVE(); + INIT( GL_LINE_STRIP ); + + if (flags & PRIM_BEGIN) + j = start; + else + j = start + 1; + + /* Ensure last vertex won't wrap buffers: + */ + currentsz--; + dmasz--; + + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + if (j + 1 < count) { + for ( ; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + + if (start < count - 1 && (flags & PRIM_END)) + EMIT_VERTS( ctx, start, 1 ); + } + else if (start + 1 < count && (flags & PRIM_END)) { + EMIT_VERTS( ctx, start+1, 1 ); + EMIT_VERTS( ctx, start, 1 ); + } + + FINISH; + + } else { + VERT_FALLBACK( ctx, start, count, flags ); + } +} + + +static void TAG(render_triangles_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + LOCAL_VARS; + int dmasz = (GET_SUBSEQUENT_VB_MAX_VERTS()/3) * 3; + int currentsz = (GET_CURRENT_VB_MAX_VERTS()/3) * 3; + GLuint j, nr; + + INIT(GL_TRIANGLES); + + /* Emit whole number of tris in total. dmasz is already a multiple + * of 3. + */ + count -= (count-start)%3; + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + FINISH; +} + + + +static void TAG(render_tri_strip_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_TRI_STRIPS) { + LOCAL_VARS; + GLuint j, nr; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz; + + INIT(GL_TRIANGLE_STRIP); + NEW_PRIMITIVE(); + + currentsz = GET_CURRENT_VB_MAX_VERTS(); + + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + if ((flags & PRIM_PARITY) && count - start > 2) { + if (HAVE_TRI_STRIP_1 && 0) { + } else { + EMIT_VERTS( ctx, start, 1 ); + currentsz--; + } + } + + /* From here on emit even numbers of tris when wrapping over buffers: + */ + dmasz -= (dmasz & 1); + currentsz -= (currentsz & 1); + + for (j = start ; j + 2 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + + FINISH; + + } else { + VERT_FALLBACK( ctx, start, count, flags ); + } +} + +static void TAG(render_tri_fan_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_TRI_FANS) { + LOCAL_VARS; + GLuint j, nr; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz = GET_CURRENT_VB_MAX_VERTS(); + + NEW_PRIMITIVE(); + INIT(GL_TRIANGLE_FAN); + + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + for (j = start + 1 ; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j + 1 ); + EMIT_VERTS( ctx, start, 1 ); + EMIT_VERTS( ctx, j, nr - 1 ); + currentsz = dmasz; + } + + FINISH; + + } + else { + /* Could write code to emit these as indexed vertices (for the + * g400, for instance). + */ + VERT_FALLBACK( ctx, start, count, flags ); + } +} + + +static void TAG(render_poly_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_POLYGONS) { + LOCAL_VARS; + GLuint j, nr; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz = GET_CURRENT_VB_MAX_VERTS(); + + NEW_PRIMITIVE(); + INIT(GL_POLYGON); + + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + for (j = start + 1 ; j + 1 < count ; j += nr - 1 ) { + nr = MIN2( currentsz, count - j + 1 ); + EMIT_VERTS( ctx, start, 1 ); + EMIT_VERTS( ctx, j, nr - 1 ); + currentsz = dmasz; + } + + FINISH; + + } + else if (HAVE_TRI_FANS && !(ctx->_TriangleCaps & DD_FLATSHADE)) { + TAG(render_tri_fan_verts)( ctx, start, count, flags ); + } else { + VERT_FALLBACK( ctx, start, count, flags ); + } +} + +static void TAG(render_quad_strip_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + GLuint j, nr; + + if (HAVE_QUAD_STRIPS) { + LOCAL_VARS; + GLuint j, nr; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz; + + INIT(GL_QUAD_STRIP); + NEW_PRIMITIVE(); + + currentsz = GET_CURRENT_VB_MAX_VERTS(); + + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + dmasz -= (dmasz & 2); + currentsz -= (currentsz & 2); + + for (j = start ; j + 3 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + + FINISH; + + } else if (HAVE_TRI_STRIPS && (ctx->_TriangleCaps & DD_FLATSHADE)) { + if (TAG(emit_elt_verts)( ctx, start, count )) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint j, nr; + + /* Simulate flat-shaded quadstrips using indexed vertices: + */ + NEW_PRIMITIVE(); + ELT_INIT( GL_TRIANGLES ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + + /* Emit whole number of quads in total, and in each buffer. + */ + dmasz -= dmasz & 1; + count -= (count-start) & 1; + currentsz -= currentsz & 1; + + if (currentsz < 12) + currentsz = dmasz; + + currentsz = currentsz/6*2; + dmasz = dmasz/6*2; + + for (j = start; j + 3 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + if (nr >= 4) { + GLint quads = (nr/2)-1; + GLint i; + ELTS_VARS; + + NEW_PRIMITIVE(); + ALLOC_ELTS_NEW_PRIMITIVE( quads*6 ); + + for ( i = j-start ; i < j-start+quads*2 ; i+=2 ) { + EMIT_TWO_ELTS( 0, (i+0), (i+1) ); + EMIT_TWO_ELTS( 2, (i+2), (i+1) ); + EMIT_TWO_ELTS( 4, (i+3), (i+2) ); + INCR_ELTS( 6 ); + } + + NEW_PRIMITIVE(); + } + currentsz = dmasz; + } + + RELEASE_ELT_VERTS(); + } + else { + /* Vertices won't fit in a single buffer or elts not available, + * VERT_FALLBACK. + */ + VERT_FALLBACK( ctx, start, count, flags ); + } + } + else if (HAVE_TRI_STRIPS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz = GET_CURRENT_VB_MAX_VERTS(); + + /* Emit smooth-shaded quadstrips as tristrips: + */ + NEW_PRIMITIVE(); + INIT( GL_TRIANGLE_STRIP ); + + /* Emit whole number of quads in total, and in each buffer. + */ + dmasz -= dmasz & 1; + currentsz -= currentsz & 1; + count -= (count-start) & 1; + + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + for (j = start; j + 3 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + + FINISH; + + } else { + VERT_FALLBACK( ctx, start, count, flags ); + } +} + + +static void TAG(render_quads_verts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_QUADS) { + LOCAL_VARS; + int dmasz = (GET_SUBSEQUENT_VB_MAX_VERTS()/4) * 4; + int currentsz = (GET_CURRENT_VB_MAX_VERTS()/4) * 4; + GLuint j, nr; + + INIT(GL_QUADS); + + /* Emit whole number of quads in total. dmasz is already a multiple + * of 4. + */ + count -= (count-start)%4; + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr) { + nr = MIN2( currentsz, count - j ); + EMIT_VERTS( ctx, j, nr ); + currentsz = dmasz; + } + FINISH; + } else if (TAG(emit_elt_verts)( ctx, start, count )) { + /* Hardware doesn't have a quad primitive type -- try to + * simulate it using indexed vertices and the triangle + * primitive: + */ + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint j, nr; + + NEW_PRIMITIVE(); + ELT_INIT( GL_TRIANGLES ); + currentsz = GET_CURRENT_VB_MAX_ELTS(); + + /* Emit whole number of quads in total, and in each buffer. + */ + dmasz -= dmasz & 3; + count -= (count-start) & 3; + currentsz -= currentsz & 3; + + /* Adjust for rendering as triangles: + */ + currentsz = currentsz/6*4; + dmasz = dmasz/6*4; + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr ) { + nr = MIN2( currentsz, count - j ); + if (nr >= 4) { + GLint quads = nr/4; + GLint i; + ELTS_VARS; + + NEW_PRIMITIVE(); + ALLOC_ELTS_NEW_PRIMITIVE( quads*6 ); + + for ( i = j-start ; i < j-start+quads*4 ; i+=4 ) { + EMIT_TWO_ELTS( 0, (i+0), (i+1) ); + EMIT_TWO_ELTS( 2, (i+3), (i+1) ); + EMIT_TWO_ELTS( 4, (i+2), (i+3) ); + INCR_ELTS( 6 ); + } + + NEW_PRIMITIVE(); + } + currentsz = dmasz; + } + + RELEASE_ELT_VERTS(); + } + else { + /* Vertices won't fit in a single buffer, fallback. + */ + VERT_FALLBACK( ctx, start, count, flags ); + } +} + +static void TAG(render_noop)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ +} + + + + +static render_func TAG(render_tab_verts)[GL_POLYGON+2] = +{ + TAG(render_points_verts), + TAG(render_lines_verts), + TAG(render_line_loop_verts), + TAG(render_line_strip_verts), + TAG(render_triangles_verts), + TAG(render_tri_strip_verts), + TAG(render_tri_fan_verts), + TAG(render_quads_verts), + TAG(render_quad_strip_verts), + TAG(render_poly_verts), + TAG(render_noop), +}; + + +/**************************************************************************** + * Render elts using hardware indexed verts * + ****************************************************************************/ + +#if (HAVE_ELTS) +static void TAG(render_points_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_POINTS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + GLuint j, nr; + + ELT_INIT( GL_POINTS ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_elts)( ctx, elts+j, nr ); + NEW_PRIMITIVE(); + currentsz = dmasz; + } + } else { + ELT_FALLBACK( ctx, start, count, flags ); + } +} + + + +static void TAG(render_lines_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_LINES) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + GLuint j, nr; + + ELT_INIT( GL_LINES ); + + /* Emit whole number of lines in total and in each buffer: + */ + count -= (count-start) & 1; + currentsz -= currentsz & 1; + dmasz -= dmasz & 1; + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_elts)( ctx, elts+j, nr ); + NEW_PRIMITIVE(); + currentsz = dmasz; + } + } else { + ELT_FALLBACK( ctx, start, count, flags ); + } +} + + +static void TAG(render_line_strip_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_LINE_STRIPS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + GLuint j, nr; + + NEW_PRIMITIVE(); /* always a new primitive */ + ELT_INIT( GL_LINE_STRIP ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_elts)( ctx, elts+j, nr ); + NEW_PRIMITIVE(); + currentsz = dmasz; + } + } else { + /* TODO: Try to emit as indexed lines. + */ + ELT_FALLBACK( ctx, start, count, flags ); + } +} + + +static void TAG(render_line_loop_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_LINE_STRIPS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + GLuint j, nr; + + NEW_PRIMITIVE(); + ELT_INIT( GL_LINE_STRIP ); + + if (flags & PRIM_BEGIN) + j = start; + else + j = start + 1; + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + /* Ensure last vertex doesn't wrap: + */ + currentsz--; + dmasz--; + + for ( ; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j ); +/* NEW_PRIMITIVE(); */ + TAG(emit_elts)( ctx, elts+j, nr ); + currentsz = dmasz; + } + + if (flags & PRIM_END) + TAG(emit_elts)( ctx, elts+start, 1 ); + + NEW_PRIMITIVE(); + } else { + /* TODO: Try to emit as indexed lines */ + ELT_FALLBACK( ctx, start, count, flags ); + } +} + + +/* For verts, we still eliminate the copy from main memory to dma + * buffers. For elts, this is probably no better (worse?) than the + * standard path. + */ +static void TAG(render_triangles_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + LOCAL_VARS; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS()/3*3; + int currentsz; + GLuint j, nr; + + NEW_PRIMITIVE(); + ELT_INIT( GL_TRIANGLES ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + + /* Emit whole number of tris in total. dmasz is already a multiple + * of 3. + */ + count -= (count-start)%3; + currentsz -= currentsz%3; + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr) { + nr = MIN2( currentsz, count - j ); + TAG(emit_elts)( ctx, elts+j, nr ); + NEW_PRIMITIVE(); + currentsz = dmasz; + } +} + + + +static void TAG(render_tri_strip_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_TRI_STRIPS) { + LOCAL_VARS; + GLuint j, nr; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + + NEW_PRIMITIVE(); + ELT_INIT( GL_TRIANGLE_STRIP ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + if ((flags & PRIM_PARITY) && count - start > 2) { + TAG(emit_elts)( ctx, elts+start, 1 ); + } + + /* Keep the same winding over multiple buffers: + */ + dmasz -= (dmasz & 1); + currentsz -= (currentsz & 1); + + for (j = start ; j + 2 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_elts)( ctx, elts+j, nr ); + NEW_PRIMITIVE(); + currentsz = dmasz; + } + } else { + /* TODO: try to emit as indexed triangles */ + ELT_FALLBACK( ctx, start, count, flags ); + } +} + +static void TAG(render_tri_fan_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_TRI_FANS) { + LOCAL_VARS; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + GLuint j, nr; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + + NEW_PRIMITIVE(); + ELT_INIT( GL_TRIANGLE_FAN ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + for (j = start + 1 ; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j + 1 ); + TAG(emit_elts)( ctx, elts+start, 1 ); + TAG(emit_elts)( ctx, elts+j, nr - 1 ); + NEW_PRIMITIVE(); + currentsz = dmasz; + } + } else { + /* TODO: try to emit as indexed triangles */ + ELT_FALLBACK( ctx, start, count, flags ); + } +} + + +static void TAG(render_poly_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_POLYGONS && 0) { + } else if (HAVE_TRI_FANS && !(ctx->_TriangleCaps & DD_FLATSHADE)) { + LOCAL_VARS; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + GLuint j, nr; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + + NEW_PRIMITIVE(); + ELT_INIT( GL_TRIANGLE_FAN ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) { + NEW_BUFFER(); + currentsz = dmasz; + } + + for (j = start + 1 ; j + 1 < count ; j += nr - 1 ) { + nr = MIN2( currentsz, count - j + 1 ); + TAG(emit_elts)( ctx, elts+start, 1 ); + TAG(emit_elts)( ctx, elts+j, nr - 1 ); + NEW_PRIMITIVE(); + currentsz = dmasz; + } + } else { + ELT_FALLBACK( ctx, start, count, flags ); + } +} + +static void TAG(render_quad_strip_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_QUAD_STRIPS && 0) { + } + else if (HAVE_TRI_STRIPS) { + LOCAL_VARS; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint j, nr; + + NEW_PRIMITIVE(); + currentsz = GET_CURRENT_VB_MAX_ELTS(); + + /* Emit whole number of quads in total, and in each buffer. + */ + dmasz -= dmasz & 1; + count -= (count-start) & 1; + currentsz -= currentsz & 1; + + if (currentsz < 12) + currentsz = dmasz; + + if (ctx->_TriangleCaps & DD_FLATSHADE) { + ELT_INIT( GL_TRIANGLES ); + + currentsz = currentsz/6*2; + dmasz = dmasz/6*2; + + for (j = start; j + 3 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + + if (nr >= 4) + { + GLint i; + GLint quads = (nr/2)-1; + ELTS_VARS; + + + NEW_PRIMITIVE(); + ALLOC_ELTS_NEW_PRIMITIVE( quads*6 ); + + for ( i = j-start ; i < j-start+quads ; i++, elts += 2 ) { + EMIT_TWO_ELTS( 0, elts[0], elts[1] ); + EMIT_TWO_ELTS( 2, elts[2], elts[1] ); + EMIT_TWO_ELTS( 4, elts[3], elts[2] ); + INCR_ELTS( 6 ); + } + + NEW_PRIMITIVE(); + } + + currentsz = dmasz; + } + } + else { + ELT_INIT( GL_TRIANGLE_STRIP ); + + for (j = start; j + 3 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_elts)( ctx, elts+j, nr ); + NEW_PRIMITIVE(); + currentsz = dmasz; + } + } + } +} + + +static void TAG(render_quads_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_QUADS && 0) { + } else { + LOCAL_VARS; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint j, nr; + + ELT_INIT( GL_TRIANGLES ); + currentsz = GET_CURRENT_VB_MAX_ELTS(); + + /* Emit whole number of quads in total, and in each buffer. + */ + dmasz -= dmasz & 3; + count -= (count-start) & 3; + currentsz -= currentsz & 3; + + /* Adjust for rendering as triangles: + */ + currentsz = currentsz/6*4; + dmasz = dmasz/6*4; + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j + 3 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + + if (nr >= 4) + { + GLint quads = nr/4; + GLint i; + ELTS_VARS; + NEW_PRIMITIVE(); + ALLOC_ELTS_NEW_PRIMITIVE( quads * 6 ); + + for ( i = j-start ; i < j-start+quads ; i++, elts += 4 ) { + EMIT_TWO_ELTS( 0, elts[0], elts[1] ); + EMIT_TWO_ELTS( 2, elts[3], elts[1] ); + EMIT_TWO_ELTS( 4, elts[2], elts[3] ); + INCR_ELTS( 6 ); + } + } + + NEW_PRIMITIVE(); + currentsz = dmasz; + } + } +} + + + +static render_func TAG(render_tab_elts)[GL_POLYGON+2] = +{ + TAG(render_points_elts), + TAG(render_lines_elts), + TAG(render_line_loop_elts), + TAG(render_line_strip_elts), + TAG(render_triangles_elts), + TAG(render_tri_strip_elts), + TAG(render_tri_fan_elts), + TAG(render_quads_elts), + TAG(render_quad_strip_elts), + TAG(render_poly_elts), + TAG(render_noop), +}; +#endif -- cgit v1.2.3