0,0 → 1,1266 |
/* |
* Mesa 3-D graphics library |
* |
* Copyright (C) 1999-2006 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 <keithw@vmware.com> |
*/ |
|
|
/** |
* \file t_dd_dmatmp.h |
* 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)( struct gl_context *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)( struct gl_context *ctx, GLuint start, |
GLuint count, void *buf ) |
{ |
return EMIT_VERTS(ctx, start, count, buf); |
} |
|
/*********************************************************************** |
* Render non-indexed primitives. |
***********************************************************************/ |
|
static void TAG(render_points_verts)( struct gl_context *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", __func__); |
return; |
} |
} |
|
static void TAG(render_lines_verts)( struct gl_context *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", __func__); |
return; |
} |
} |
|
|
static void TAG(render_line_strip_verts)( struct gl_context *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", __func__); |
return; |
} |
} |
|
|
static void TAG(render_line_loop_verts)( struct gl_context *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 ); |
(void) 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 ); |
(void) tmp; |
} |
|
FLUSH(); |
|
} else { |
fprintf(stderr, "%s - cannot draw primitive\n", __func__); |
return; |
} |
} |
|
|
static void TAG(render_triangles_verts)( struct gl_context *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)( struct gl_context *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", __func__); |
return; |
} |
} |
|
static void TAG(render_tri_fan_verts)( struct gl_context *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 ); |
(void) 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", __func__); |
return; |
} |
} |
|
|
static void TAG(render_poly_verts)( struct gl_context *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 ); |
(void) tmp; |
currentsz = dmasz; |
} |
|
FLUSH(); |
} |
else if (HAVE_TRI_FANS && ctx->Light.ShadeModel == GL_SMOOTH) { |
TAG(render_tri_fan_verts)( ctx, start, count, flags ); |
} else { |
fprintf(stderr, "%s - cannot draw primitive\n", __func__); |
return; |
} |
} |
|
static void TAG(render_quad_strip_verts)( struct gl_context *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->Light.ShadeModel == GL_FLAT && |
TNL_CONTEXT(ctx)->vb.AttribPtr[_TNL_ATTRIB_COLOR0]->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", __func__); |
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", __func__); |
return; |
} |
} |
|
|
static void TAG(render_quads_verts)( struct gl_context *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); |
(void) tmp; |
} |
} |
else { |
/* Vertices won't fit in a single buffer, should never happen. |
*/ |
fprintf(stderr, "%s - cannot draw primitive\n", __func__); |
return; |
} |
} |
|
static void TAG(render_noop)( struct gl_context *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)( struct gl_context *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", __func__); |
return; |
} |
} |
|
|
|
static void TAG(render_lines_elts)( struct gl_context *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", __func__); |
return; |
} |
} |
|
|
static void TAG(render_line_strip_elts)( struct gl_context *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", __func__); |
return; |
} |
} |
|
|
static void TAG(render_line_loop_elts)( struct gl_context *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 ); |
(void) 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 ); |
(void) tmp; |
} |
|
FLUSH(); |
} else { |
/* TODO: Try to emit as indexed lines */ |
fprintf(stderr, "%s - cannot draw primitive\n", __func__); |
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)( struct gl_context *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)( struct gl_context *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", __func__); |
return; |
} |
} |
|
static void TAG(render_tri_fan_elts)( struct gl_context *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 ); |
(void) tmp; |
FLUSH(); |
currentsz = dmasz; |
} |
} else { |
/* TODO: try to emit as indexed triangles */ |
fprintf(stderr, "%s - cannot draw primitive\n", __func__); |
return; |
} |
} |
|
|
static void TAG(render_poly_elts)( struct gl_context *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 ); |
(void) tmp; |
FLUSH(); |
currentsz = dmasz; |
} |
} else if (HAVE_TRI_FANS && ctx->Light.ShadeModel == GL_SMOOTH) { |
TAG(render_tri_fan_verts)( ctx, start, count, flags ); |
} else { |
fprintf(stderr, "%s - cannot draw primitive\n", __func__); |
return; |
} |
} |
|
static void TAG(render_quad_strip_elts)( struct gl_context *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->Light.ShadeModel == GL_FLAT) { |
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)( struct gl_context *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)( struct gl_context *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->Light.ShadeModel == GL_SMOOTH); |
} |
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->Light.ShadeModel == GL_FLAT && |
VB->AttribPtr[_TNL_ATTRIB_COLOR0]->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; |
} |
|