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/*
* Mesa 3-D graphics library
* Version: 4.0.3
*
* Copyright (C) 1999-2002 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.
*
*/
#if !HAVE_TRIANGLES || !HAVE_POINTS || !HAVE_LINES
#error "must have points, lines & triangles to use render template"
#endif
#if !HAVE_TRI_STRIPS || !HAVE_TRI_FANS
#error "must have tri strip and fans to use render template"
#endif
#if !HAVE_LINE_STRIPS
#error "must have line strips to use render template"
#endif
#if !HAVE_POLYGONS
#error "must have polygons to use render template"
#endif
#if !HAVE_ELTS
#error "must have elts to use render template"
#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 */
/**********************************************************************/
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 );
}
}
static void TAG(emit_consecutive_elts)( GLcontext *ctx, GLuint start, GLuint nr )
{
GLint i;
LOCAL_VARS;
ELTS_VARS;
ALLOC_ELTS( nr );
for ( i = 0 ; i+1 < nr ; i+=2, start += 2 ) {
EMIT_TWO_ELTS( 0, start, start+1 );
INCR_ELTS( 2 );
}
if (i < nr) {
EMIT_ELT( 0, start );
INCR_ELTS( 1 );
}
}
/***********************************************************************
* Render non-indexed primitives.
***********************************************************************/
static void TAG(render_points_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
if (start < count) {
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
EMIT_PRIM( ctx, GL_POINTS, HW_POINTS, start, count );
}
}
static void TAG(render_lines_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
count -= (count-start) & 1;
if (start+1 >= count)
return;
if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag) {
RESET_STIPPLE();
AUTO_STIPPLE( GL_TRUE );
}
EMIT_PRIM( ctx, GL_LINES, HW_LINES, start, count );
if ((flags & PRIM_END) && ctx->Line.StippleFlag)
AUTO_STIPPLE( GL_FALSE );
}
static void TAG(render_line_strip_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
if (start+1 >= count)
return;
if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag)
RESET_STIPPLE();
if (PREFER_DISCRETE_ELT_PRIM( count-start, HW_LINES ))
{
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint j, nr;
ELT_INIT( GL_LINES, HW_LINES );
/* Emit whole number of lines in each full buffer.
*/
dmasz = dmasz/2;
currentsz = GET_CURRENT_VB_MAX_ELTS();
currentsz = currentsz/2;
if (currentsz < 4) {
NEW_BUFFER();
currentsz = dmasz;
}
for (j = start; j + 1 < count; j += nr - 1 ) {
GLint i;
ELTS_VARS;
nr = MIN2( currentsz, count - j );
ALLOC_ELTS( (nr-1)*2 );
for ( i = j ; i+1 < j+nr ; i+=1 ) {
EMIT_TWO_ELTS( 0, (i+0), (i+1) );
INCR_ELTS( 2 );
}
if (nr == currentsz) {
NEW_BUFFER();
currentsz = dmasz;
}
}
}
else
EMIT_PRIM( ctx, GL_LINE_STRIP, HW_LINE_STRIP, start, count );
}
static void TAG(render_line_loop_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
GLuint j, nr;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
if (flags & PRIM_BEGIN) {
j = start;
if (ctx->Line.StippleFlag)
RESET_STIPPLE( );
}
else
j = start + 1;
if (flags & PRIM_END) {
if (start+1 >= count)
return;
if (PREFER_DISCRETE_ELT_PRIM( count-start, HW_LINES )) {
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
ELT_INIT( GL_LINES, HW_LINES );
/* Emit whole number of lines in each full buffer.
*/
dmasz = dmasz/2;
currentsz = GET_CURRENT_VB_MAX_ELTS();
currentsz = currentsz/2;
if (currentsz < 4) {
NEW_BUFFER();
currentsz = dmasz;
}
/* Ensure last vertex doesn't wrap:
*/
currentsz--;
dmasz--;
for (; j + 1 < count; ) {
GLint i;
ELTS_VARS;
nr = MIN2( currentsz, count - j );
ALLOC_ELTS( (nr-1)*2 );
for ( i = j ; i+1 < j+nr ; i+=1 ) {
EMIT_TWO_ELTS( 0, (i+0), (i+1) );
INCR_ELTS( 2 );
}
j += nr - 1;
if (j + 1 < count) {
NEW_BUFFER();
currentsz = dmasz;
}
else {
ALLOC_ELTS( 2 );
EMIT_TWO_ELTS( 0, (j), (start) );
INCR_ELTS( 2 );
}
}
}
else
{
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
ELT_INIT( GL_LINE_STRIP, HW_LINE_STRIP );
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; ) {
nr = MIN2( currentsz, count - j );
if (j + nr < count) {
TAG(emit_consecutive_elts)( ctx, j, nr );
currentsz = dmasz;
j += nr - 1;
NEW_BUFFER();
}
else if (nr) {
ELTS_VARS;
int i;
ALLOC_ELTS( nr + 1 );
for ( i = 0 ; i+1 < nr ; i+=2, j += 2 ) {
EMIT_TWO_ELTS( 0, j, j+1 );
INCR_ELTS( 2 );
}
if (i < nr) {
EMIT_ELT( 0, j ); j++;
INCR_ELTS( 1 );
}
EMIT_ELT( 0, start );
INCR_ELTS( 1 );
NEW_BUFFER();
}
else {
fprintf(stderr, "warining nr==0\n");
}
}
}
} else {
TAG(render_line_strip_verts)( ctx, j, count, flags );
}
}
static void TAG(render_triangles_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
count -= (count-start)%3;
if (start+2 >= count) {
return;
}
/* need a PREFER_DISCRETE_ELT_PRIM here too..
*/
EMIT_PRIM( ctx, GL_TRIANGLES, HW_TRIANGLES, start, count );
}
static void TAG(render_tri_strip_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
if (start + 2 >= count)
return;
if (PREFER_DISCRETE_ELT_PRIM( count-start, HW_TRIANGLES ))
{
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
int parity = 0;
GLuint j, nr;
ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
if (flags & PRIM_PARITY)
parity = 1;
/* Emit even number of tris in each full buffer.
*/
dmasz = dmasz/3;
dmasz -= dmasz & 1;
currentsz = GET_CURRENT_VB_MAX_ELTS();
currentsz = currentsz/3;
currentsz -= currentsz & 1;
if (currentsz < 4) {
NEW_BUFFER();
currentsz = dmasz;
}
for (j = start; j + 2 < count; j += nr - 2 ) {
GLint i;
ELTS_VARS;
nr = MIN2( currentsz, count - j );
ALLOC_ELTS( (nr-2)*3 );
for ( i = j ; i+2 < j+nr ; i++, parity^=1 ) {
EMIT_ELT( 0, (i+0+parity) );
EMIT_ELT( 1, (i+1-parity) );
EMIT_ELT( 2, (i+2) );
INCR_ELTS( 3 );
}
if (nr == currentsz) {
NEW_BUFFER();
currentsz = dmasz;
}
}
}
else if ((flags & PRIM_PARITY) == 0)
EMIT_PRIM( ctx, GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0, start, count );
else if (HAVE_TRI_STRIP_1)
EMIT_PRIM( ctx, GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_1, start, count );
else {
/* Emit the first triangle with elts, then the rest as a regular strip.
* TODO: Make this unlikely in t_imm_api.c
*/
ELTS_VARS;
ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
ALLOC_ELTS( 3 );
EMIT_ELT( 0, (start+1) );
EMIT_ELT( 1, (start+0) );
EMIT_ELT( 2, (start+2) );
INCR_ELTS( 3 );
NEW_PRIMITIVE();
start++;
if (start + 2 >= count)
return;
EMIT_PRIM( ctx, GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0, start,
count );
}
}
static void TAG(render_tri_fan_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
if (start+2 >= count)
return;
if (PREFER_DISCRETE_ELT_PRIM( count-start, HW_TRIANGLES ))
{
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint j, nr;
ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
dmasz = dmasz/3;
currentsz = GET_CURRENT_VB_MAX_ELTS();
currentsz = currentsz/3;
if (currentsz < 4) {
NEW_BUFFER();
currentsz = dmasz;
}
for (j = start + 1; j + 1 < count; j += nr - 1 ) {
GLint i;
ELTS_VARS;
nr = MIN2( currentsz, count - j );
ALLOC_ELTS( (nr-1)*3 );
for ( i = j ; i+1 < j+nr ; i++ ) {
EMIT_ELT( 0, (start) );
EMIT_ELT( 1, (i) );
EMIT_ELT( 2, (i+1) );
INCR_ELTS( 3 );
}
if (nr == currentsz) {
NEW_BUFFER();
currentsz = dmasz;
}
}
}
else {
EMIT_PRIM( ctx, GL_TRIANGLE_FAN, HW_TRIANGLE_FAN, start, count );
}
}
static void TAG(render_poly_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
if (start+2 >= count)
return;
EMIT_PRIM( ctx, GL_POLYGON, HW_POLYGON, start, count );
}
static void TAG(render_quad_strip_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
count -= (count-start) & 1;
if (start+3 >= count)
return;
if (HAVE_QUAD_STRIPS) {
EMIT_PRIM( ctx, GL_QUAD_STRIP, HW_QUAD_STRIP, start, count );
}
else if (ctx->_TriangleCaps & DD_FLATSHADE) {
LOCAL_VARS;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint j, nr;
ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
currentsz = GET_CURRENT_VB_MAX_ELTS();
/* Emit whole number of quads in total, and in each buffer.
*/
currentsz = (currentsz/6)*2;
dmasz = (dmasz/6)*2;
if (currentsz < 4) {
NEW_BUFFER();
currentsz = dmasz;
}
for (j = start; j + 3 < count; j += nr - 2 ) {
ELTS_VARS;
GLint quads, i;
nr = MIN2( currentsz, count - j );
quads = (nr/2)-1;
ALLOC_ELTS( quads*6 );
for ( i = j ; i < j+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 );
}
if (nr == currentsz) {
NEW_BUFFER();
currentsz = dmasz;
}
}
}
else {
EMIT_PRIM( ctx, GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0, start, count );
}
}
static void TAG(render_quads_verts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
count -= (count-start)%4;
if (start+3 >= count)
return;
if (HAVE_QUADS) {
EMIT_PRIM( ctx, HW_QUADS, GL_QUADS, start, count );
}
else {
/* Hardware doesn't have a quad primitive type -- simulate it
* using indexed vertices and the triangle primitive:
*/
LOCAL_VARS;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint j, nr;
ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
currentsz = GET_CURRENT_VB_MAX_ELTS();
/* Adjust for rendering as triangles:
*/
currentsz = (currentsz/6)*4;
dmasz = (dmasz/6)*4;
if (currentsz < 8) {
NEW_BUFFER();
currentsz = dmasz;
}
for (j = start; j < count; j += nr ) {
ELTS_VARS;
GLint quads, i;
nr = MIN2( currentsz, count - j );
quads = nr/4;
ALLOC_ELTS( quads*6 );
for ( i = j ; i < j+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 );
}
if (nr == currentsz) {
NEW_BUFFER();
currentsz = dmasz;
}
}
}
}
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 *
****************************************************************************/
static void TAG(render_points_elts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint *elts = GET_ELTS();
GLuint j, nr;
ELT_INIT( GL_POINTS, HW_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;
}
}
static void TAG(render_lines_elts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint *elts = GET_ELTS();
GLuint j, nr;
if (start+1 >= count)
return;
if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag) {
RESET_STIPPLE();
AUTO_STIPPLE( GL_TRUE );
}
ELT_INIT( GL_LINES, HW_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;
}
if ((flags & PRIM_END) && ctx->Line.StippleFlag)
AUTO_STIPPLE( GL_FALSE );
}
static void TAG(render_line_strip_elts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint *elts = GET_ELTS();
GLuint j, nr;
if (start+1 >= count)
return;
ELT_INIT( GL_LINE_STRIP, HW_LINE_STRIP );
if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag)
RESET_STIPPLE();
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;
}
}
static void TAG(render_line_loop_elts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint *elts = GET_ELTS();
GLuint j, nr;
if (0) fprintf(stderr, "%s\n", __FUNCTION__);
if (flags & PRIM_BEGIN)
j = start;
else
j = start + 1;
if (flags & PRIM_END) {
if (start+1 >= count)
return;
}
else {
if (j+1 >= count)
return;
}
ELT_INIT( GL_LINE_STRIP, HW_LINE_STRIP );
if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag)
RESET_STIPPLE();
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 );
TAG(emit_elts)( ctx, elts+j, nr );
currentsz = dmasz;
}
if (flags & PRIM_END)
TAG(emit_elts)( ctx, elts+start, 1 );
NEW_PRIMITIVE();
}
static void TAG(render_triangles_elts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
GLuint *elts = GET_ELTS();
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS()/3*3;
int currentsz;
GLuint j, nr;
if (start+2 >= count)
return;
/* NEW_PRIMITIVE(); */
ELT_INIT( GL_TRIANGLES, HW_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 )
{
LOCAL_VARS;
GLuint j, nr;
GLuint *elts = GET_ELTS();
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
if (start+2 >= count)
return;
ELT_INIT( GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0 );
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 );
currentsz--;
}
/* 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;
}
}
static void TAG(render_tri_fan_elts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
GLuint *elts = GET_ELTS();
GLuint j, nr;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
if (start+2 >= count)
return;
ELT_INIT( GL_TRIANGLE_FAN, HW_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;
}
}
static void TAG(render_poly_elts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
LOCAL_VARS;
GLuint *elts = GET_ELTS();
GLuint j, nr;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
if (start+2 >= count)
return;
ELT_INIT( GL_POLYGON, HW_POLYGON );
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;
}
}
static void TAG(render_quad_strip_elts)( GLcontext *ctx,
GLuint start,
GLuint count,
GLuint flags )
{
if (start+3 >= count)
return;
if (HAVE_QUAD_STRIPS && 0) {
}
else {
LOCAL_VARS;
GLuint *elts = GET_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, HW_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 );
}
NEW_PRIMITIVE();
}
currentsz = dmasz;
}
}
else {
ELT_INIT( GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0 );
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 (start+3 >= count)
return;
if (HAVE_QUADS && 0) {
} else {
LOCAL_VARS;
GLuint *elts = GET_ELTS();
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
int currentsz;
GLuint j, nr;
ELT_INIT( GL_TRIANGLES, HW_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 );
}
}
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),
};