diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/tnl_dd/t_dd_dmatmp.h')
-rw-r--r-- | nx-X11/extras/Mesa/src/mesa/tnl_dd/t_dd_dmatmp.h | 1254 |
1 files changed, 1254 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/tnl_dd/t_dd_dmatmp.h b/nx-X11/extras/Mesa/src/mesa/tnl_dd/t_dd_dmatmp.h new file mode 100644 index 000000000..d274ead2c --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/tnl_dd/t_dd_dmatmp.h @@ -0,0 +1,1254 @@ +/* + * Mesa 3-D graphics library + * Version: 6.1 + * + * Copyright (C) 1999-2004 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> + */ + + +/* 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. + */ + +#if !defined(HAVE_TRIANGLES) +#error "must have at least triangles to use render template" +#endif + +#if !HAVE_ELTS +#define ELTS_VARS(buf) +#define ALLOC_ELTS(nr) 0 +#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 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 + + +/**********************************************************************/ +/* Render whole begin/end objects */ +/**********************************************************************/ + + + + +#if (HAVE_ELTS) +static void *TAG(emit_elts)( GLcontext *ctx, GLuint *elts, GLuint nr, + void *buf) +{ + GLint i; + LOCAL_VARS; + ELTS_VARS(buf); + + for ( i = 0 ; i+1 < nr ; i+=2, elts += 2 ) { + EMIT_TWO_ELTS( 0, elts[0], elts[1] ); + INCR_ELTS( 2 ); + } + + if (i < nr) { + EMIT_ELT( 0, elts[0] ); + INCR_ELTS( 1 ); + } + + return (void *)ELTPTR; +} +#endif + +static __inline void *TAG(emit_verts)( GLcontext *ctx, GLuint start, + GLuint count, void *buf ) +{ + return EMIT_VERTS(ctx, start, count, buf); +} + +/*********************************************************************** + * 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; + GLuint j, nr; + + INIT( GL_POINTS ); + + currentsz = GET_CURRENT_VB_MAX_VERTS(); + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } + + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + +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; + GLuint j, nr; + + INIT( GL_LINES ); + + /* Emit whole number of lines in total and in each buffer: + */ + count -= (count-start) & 1; + currentsz = GET_CURRENT_VB_MAX_VERTS(); + currentsz -= currentsz & 1; + dmasz -= dmasz & 1; + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } + + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +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; + GLuint j, nr; + + INIT( GL_LINE_STRIP ); + + currentsz = GET_CURRENT_VB_MAX_VERTS(); + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } + + FLUSH(); + + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +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; + GLuint j, nr; + + INIT( GL_LINE_STRIP ); + + if (flags & PRIM_BEGIN) + j = start; + else + j = start + 1; + + /* Ensure last vertex won't wrap buffers: + */ + currentsz = GET_CURRENT_VB_MAX_VERTS(); + currentsz--; + dmasz--; + + if (currentsz < 8) { + currentsz = dmasz; + } + + if (j + 1 < count) { + for ( ; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j ); + + if (j + nr >= count && + start < count - 1 && + (flags & PRIM_END)) + { + void *tmp; + tmp = ALLOC_VERTS(nr+1); + tmp = TAG(emit_verts)( ctx, j, nr, tmp ); + tmp = TAG(emit_verts)( ctx, start, 1, tmp ); + } + else { + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } + } + + } + else if (start + 1 < count && (flags & PRIM_END)) { + void *tmp; + tmp = ALLOC_VERTS(2); + tmp = TAG(emit_verts)( ctx, start+1, 1, tmp ); + tmp = TAG(emit_verts)( ctx, start, 1, tmp ); + } + + FLUSH(); + + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +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; + GLuint j, nr; + + INIT(GL_TRIANGLES); + + currentsz = (GET_CURRENT_VB_MAX_VERTS()/3) * 3; + + /* 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 ); + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } +} + + + +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); + + currentsz = GET_CURRENT_VB_MAX_VERTS(); + + if (currentsz < 8) { + currentsz = dmasz; + } + + /* 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 ); + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } + + FLUSH(); + + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + +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; + + INIT(GL_TRIANGLE_FAN); + + currentsz = GET_CURRENT_VB_MAX_VERTS(); + if (currentsz < 8) { + currentsz = dmasz; + } + + for (j = start + 1 ; j + 1 < count; j += nr - 2 ) { + void *tmp; + nr = MIN2( currentsz, count - j + 1 ); + tmp = ALLOC_VERTS( nr ); + tmp = TAG(emit_verts)( ctx, start, 1, tmp ); + tmp = TAG(emit_verts)( ctx, j, nr - 1, tmp ); + currentsz = dmasz; + } + + FLUSH(); + } + else { + /* Could write code to emit these as indexed vertices (for the + * g400, for instance). + */ + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +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; + + INIT(GL_POLYGON); + + currentsz = GET_CURRENT_VB_MAX_VERTS(); + if (currentsz < 8) { + currentsz = dmasz; + } + + for (j = start + 1 ; j + 1 < count ; j += nr - 2 ) { + void *tmp; + nr = MIN2( currentsz, count - j + 1 ); + tmp = ALLOC_VERTS( nr ); + tmp = TAG(emit_verts)( ctx, start, 1, tmp ); + tmp = TAG(emit_verts)( ctx, j, nr - 1, tmp ); + currentsz = dmasz; + } + + FLUSH(); + } + else if (HAVE_TRI_FANS && !(ctx->_TriangleCaps & DD_FLATSHADE)) { + TAG(render_tri_fan_verts)( ctx, start, count, flags ); + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + +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); + + currentsz = GET_CURRENT_VB_MAX_VERTS(); + if (currentsz < 8) { + currentsz = dmasz; + } + + dmasz -= (dmasz & 2); + currentsz -= (currentsz & 2); + + for (j = start ; j + 3 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } + + FLUSH(); + + } else if (HAVE_TRI_STRIPS && + (ctx->_TriangleCaps & DD_FLATSHADE) && + TNL_CONTEXT(ctx)->vb.ColorPtr[0]->stride) { + if (HAVE_ELTS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + GLuint j, nr; + + EMIT_INDEXED_VERTS( ctx, start, count ); + + /* Simulate flat-shaded quadstrips using indexed vertices: + */ + 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( ALLOC_ELTS( 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 ); + } + + FLUSH(); + } + currentsz = dmasz; + } + + RELEASE_ELT_VERTS(); + FLUSH(); + } + else { + /* Vertices won't fit in a single buffer or elts not + * available - should never happen. + */ + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } + } + else if (HAVE_TRI_STRIPS) { + LOCAL_VARS; + int dmasz = GET_SUBSEQUENT_VB_MAX_VERTS(); + int currentsz; + + /* Emit smooth-shaded quadstrips as tristrips: + */ + FLUSH(); + INIT( GL_TRIANGLE_STRIP ); + + /* Emit whole number of quads in total, and in each buffer. + */ + dmasz -= dmasz & 1; + currentsz = GET_CURRENT_VB_MAX_VERTS(); + currentsz -= currentsz & 1; + count -= (count-start) & 1; + + if (currentsz < 8) { + currentsz = dmasz; + } + + for (j = start; j + 3 < count; j += nr - 2 ) { + nr = MIN2( currentsz, count - j ); + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } + + FLUSH(); + + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +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; + GLuint j, nr; + + INIT(GL_QUADS); + + /* Emit whole number of quads in total. dmasz is already a multiple + * of 4. + */ + count -= (count-start)%4; + + currentsz = (GET_CURRENT_VB_MAX_VERTS()/4) * 4; + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr) { + nr = MIN2( currentsz, count - j ); + TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) ); + currentsz = dmasz; + } + } + else if (HAVE_ELTS) { + /* 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; + + EMIT_INDEXED_VERTS( ctx, start, count ); + + FLUSH(); + 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( ALLOC_ELTS( 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 ); + } + + FLUSH(); + } + currentsz = dmasz; + } + + RELEASE_ELT_VERTS(); + } + else if (HAVE_TRIANGLES) { + /* Hardware doesn't have a quad primitive type -- try to + * simulate it using triangle primitive. This is a win for + * gears, but is it useful in the broader world? + */ + LOCAL_VARS; + GLuint j; + + INIT(GL_TRIANGLES); + + for (j = start; j < count-3; j += 4) { + void *tmp = ALLOC_VERTS( 6 ); + /* Send v0, v1, v3 + */ + tmp = EMIT_VERTS(ctx, j, 2, tmp); + tmp = EMIT_VERTS(ctx, j + 3, 1, tmp); + /* Send v1, v2, v3 + */ + tmp = EMIT_VERTS(ctx, j + 1, 3, tmp); + } + } + else { + /* Vertices won't fit in a single buffer, should never happen. + */ + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + +static void TAG(render_noop)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ +} + + + + +static tnl_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, ALLOC_ELTS(nr) ); + FLUSH(); + currentsz = dmasz; + } + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + + +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, ALLOC_ELTS(nr) ); + FLUSH(); + currentsz = dmasz; + } + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +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; + + FLUSH(); /* 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, ALLOC_ELTS(nr) ); + FLUSH(); + currentsz = dmasz; + } + } else { + /* TODO: Try to emit as indexed lines. + */ + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +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; + + FLUSH(); + ELT_INIT( GL_LINE_STRIP ); + + if (flags & PRIM_BEGIN) + j = start; + else + j = start + 1; + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) { + currentsz = dmasz; + } + + /* Ensure last vertex doesn't wrap: + */ + currentsz--; + dmasz--; + + if (j + 1 < count) { + for ( ; j + 1 < count; j += nr - 1 ) { + nr = MIN2( currentsz, count - j ); + + if (j + nr >= count && + start < count - 1 && + (flags & PRIM_END)) + { + void *tmp; + tmp = ALLOC_ELTS(nr+1); + tmp = TAG(emit_elts)( ctx, elts+j, nr, tmp ); + tmp = TAG(emit_elts)( ctx, elts+start, 1, tmp ); + } + else { + TAG(emit_elts)( ctx, elts+j, nr, ALLOC_ELTS(nr) ); + currentsz = dmasz; + } + } + + } + else if (start + 1 < count && (flags & PRIM_END)) { + void *tmp; + tmp = ALLOC_ELTS(2); + tmp = TAG(emit_elts)( ctx, elts+start+1, 1, tmp ); + tmp = TAG(emit_elts)( ctx, elts+start, 1, tmp ); + } + + FLUSH(); + } else { + /* TODO: Try to emit as indexed lines */ + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +/* 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; + + FLUSH(); + 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, ALLOC_ELTS(nr) ); + FLUSH(); + 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; + + FLUSH(); + ELT_INIT( GL_TRIANGLE_STRIP ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) { + currentsz = dmasz; + } + + /* 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, ALLOC_ELTS(nr) ); + FLUSH(); + currentsz = dmasz; + } + } else { + /* TODO: try to emit as indexed triangles */ + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + +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; + + FLUSH(); + ELT_INIT( GL_TRIANGLE_FAN ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) { + currentsz = dmasz; + } + + for (j = start + 1 ; j + 1 < count; j += nr - 2 ) { + void *tmp; + nr = MIN2( currentsz, count - j + 1 ); + tmp = ALLOC_ELTS( nr ); + tmp = TAG(emit_elts)( ctx, elts+start, 1, tmp ); + tmp = TAG(emit_elts)( ctx, elts+j, nr - 1, tmp ); + FLUSH(); + currentsz = dmasz; + } + } else { + /* TODO: try to emit as indexed triangles */ + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + + +static void TAG(render_poly_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_POLYGONS) { + LOCAL_VARS; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + GLuint j, nr; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS(); + int currentsz; + + FLUSH(); + ELT_INIT( GL_POLYGON ); + + currentsz = GET_CURRENT_VB_MAX_ELTS(); + if (currentsz < 8) { + currentsz = dmasz; + } + + for (j = start + 1 ; j + 1 < count; j += nr - 2 ) { + void *tmp; + nr = MIN2( currentsz, count - j + 1 ); + tmp = ALLOC_ELTS( nr ); + tmp = TAG(emit_elts)( ctx, elts+start, 1, tmp ); + tmp = TAG(emit_elts)( ctx, elts+j, nr - 1, tmp ); + FLUSH(); + currentsz = dmasz; + } + } else if (HAVE_TRI_FANS && !(ctx->_TriangleCaps & DD_FLATSHADE)) { + TAG(render_tri_fan_verts)( ctx, start, count, flags ); + } else { + fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__); + return; + } +} + +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; + + FLUSH(); + 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( ALLOC_ELTS( 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 ); + } + + FLUSH(); + } + + 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, ALLOC_ELTS(nr) ); + FLUSH(); + currentsz = dmasz; + } + } + } +} + + +static void TAG(render_quads_elts)( GLcontext *ctx, + GLuint start, + GLuint count, + GLuint flags ) +{ + if (HAVE_QUADS) { + LOCAL_VARS; + GLuint *elts = TNL_CONTEXT(ctx)->vb.Elts; + int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS()/4*4; + int currentsz; + GLuint j, nr; + + FLUSH(); + ELT_INIT( GL_TRIANGLES ); + + currentsz = GET_CURRENT_VB_MAX_ELTS()/4*4; + + count -= (count-start)%4; + + if (currentsz < 8) + currentsz = dmasz; + + for (j = start; j < count; j += nr) { + nr = MIN2( currentsz, count - j ); + TAG(emit_elts)( ctx, elts+j, nr, ALLOC_ELTS(nr) ); + FLUSH(); + currentsz = dmasz; + } + } 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( ALLOC_ELTS( 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 ); + } + + FLUSH(); + } + + currentsz = dmasz; + } + } +} + + + +static tnl_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 + + + +/* Pre-check the primitives in the VB to prevent the need for + * fallbacks later on. + */ +static GLboolean TAG(validate_render)( GLcontext *ctx, + struct vertex_buffer *VB ) +{ + GLint i; + + if (VB->ClipOrMask & ~CLIP_CULL_BIT) + return GL_FALSE; + + if (VB->Elts && !HAVE_ELTS) + return GL_FALSE; + + for (i = 0 ; i < VB->PrimitiveCount ; i++) { + GLuint prim = VB->Primitive[i].mode; + GLuint count = VB->Primitive[i].count; + GLboolean ok = GL_FALSE; + + if (!count) + continue; + + switch (prim & PRIM_MODE_MASK) { + case GL_POINTS: + ok = HAVE_POINTS; + break; + case GL_LINES: + ok = HAVE_LINES && !ctx->Line.StippleFlag; + break; + case GL_LINE_STRIP: + ok = HAVE_LINE_STRIPS && !ctx->Line.StippleFlag; + break; + case GL_LINE_LOOP: + ok = HAVE_LINE_STRIPS && !ctx->Line.StippleFlag; + break; + case GL_TRIANGLES: + ok = HAVE_TRIANGLES; + break; + case GL_TRIANGLE_STRIP: + ok = HAVE_TRI_STRIPS; + break; + case GL_TRIANGLE_FAN: + ok = HAVE_TRI_FANS; + break; + case GL_POLYGON: + if (HAVE_POLYGONS) { + ok = GL_TRUE; + } + else + ok = (HAVE_TRI_FANS && !(ctx->_TriangleCaps & DD_FLATSHADE)); + break; + case GL_QUAD_STRIP: + if (VB->Elts) { + ok = HAVE_TRI_STRIPS; + } + else if (HAVE_QUAD_STRIPS) { + ok = GL_TRUE; + } else if (HAVE_TRI_STRIPS && + (ctx->_TriangleCaps & DD_FLATSHADE) && + VB->ColorPtr[0]->stride != 0) { + if (HAVE_ELTS) { + ok = (GLint) count < GET_SUBSEQUENT_VB_MAX_ELTS(); + } + else { + ok = GL_FALSE; + } + } + else + ok = HAVE_TRI_STRIPS; + break; + case GL_QUADS: + if (HAVE_QUADS) { + ok = GL_TRUE; + } else if (HAVE_ELTS) { + ok = (GLint) count < GET_SUBSEQUENT_VB_MAX_ELTS(); + } + else { + ok = HAVE_TRIANGLES; /* flatshading is ok. */ + } + break; + default: + break; + } + + if (!ok) { +/* fprintf(stderr, "not ok %s\n", _mesa_lookup_enum_by_nr(prim & PRIM_MODE_MASK)); */ + return GL_FALSE; + } + } + + return GL_TRUE; +} + |