/*
* Mesa 3-D graphics library
*
* Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* Copyright (C) 2010 LunarG Inc.
*
* 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.
*/
#define CONCAT2(name, elt_type) name ## elt_type
#define CONCAT(name, elt_type) CONCAT2(name, elt_type)
#ifdef ELT_TYPE
/**
* Fetch all elements in [min_index, max_index] with bias, and use the
* (rebased) index buffer as the draw elements.
*/
static boolean
CONCAT(vsplit_primitive_, ELT_TYPE)(struct vsplit_frontend *vsplit,
unsigned istart, unsigned icount)
{
struct draw_context *draw = vsplit->draw;
const ELT_TYPE *ib = (const ELT_TYPE *) draw->pt.user.elts;
const unsigned min_index = draw->pt.user.min_index;
const unsigned max_index = draw->pt.user.max_index;
const int elt_bias = draw->pt.user.eltBias;
unsigned fetch_start, fetch_count;
const ushort *draw_elts = NULL;
unsigned i;
const unsigned start = istart;
const unsigned end = istart + icount;
/* If the index buffer overflows we'll need to run
* through the normal paths */
if (start >= draw->pt.user.eltMax ||
end > draw->pt.user.eltMax ||
end < istart || end < icount)
return FALSE;
/* use the ib directly */
if (min_index == 0 && sizeof(ib[0]) == sizeof(draw_elts[0])) {
if (icount > vsplit->max_vertices)
return FALSE;
for (i = 0; i < icount; i++) {
ELT_TYPE idx = DRAW_GET_IDX(ib, start + i);
if (idx < min_index || idx > max_index) {
debug_printf("warning: index out of range\n");
}
}
draw_elts = (const ushort *) (ib + istart);
}
else {
/* have to go through vsplit->draw_elts */
if (icount > vsplit->segment_size)
return FALSE;
}
/* this is faster only when we fetch less elements than the normal path */
if (max_index - min_index > icount - 1)
return FALSE;
if (elt_bias < 0 && (int) min_index < -elt_bias)
return FALSE;
/* why this check? */
for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
if (draw->pt.vertex_element[i].instance_divisor)
return FALSE;
}
fetch_start = min_index + elt_bias;
fetch_count = max_index - min_index + 1;
/* Check for overflow in the fetch_start */
if (fetch_start < min_index || fetch_start < elt_bias)
return FALSE;
if (!draw_elts) {
if (min_index == 0) {
for (i = 0; i < icount; i++) {
ELT_TYPE idx = DRAW_GET_IDX(ib, i + start);
if (idx < min_index || idx > max_index) {
debug_printf("warning: index out of range\n");
}
vsplit->draw_elts[i] = (ushort) idx;
}
}
else {
for (i = 0; i < icount; i++) {
ELT_TYPE idx = DRAW_GET_IDX(ib, i + start);
if (idx < min_index || idx > max_index) {
debug_printf("warning: index out of range\n");
}
vsplit->draw_elts[i] = (ushort) (idx - min_index);
}
}
draw_elts = vsplit->draw_elts;
}
return vsplit->middle->run_linear_elts(vsplit->middle,
fetch_start, fetch_count,
draw_elts, icount, 0x0);
}
/**
* Use the cache to prepare the fetch and draw elements, and flush.
*
* When spoken is TRUE, ispoken replaces istart; When close is TRUE, iclose is
* appended.
*/
static INLINE void
CONCAT(vsplit_segment_cache_, ELT_TYPE)(struct vsplit_frontend *vsplit,
unsigned flags,
unsigned istart, unsigned icount,
boolean spoken, unsigned ispoken,
boolean close, unsigned iclose)
{
struct draw_context *draw = vsplit->draw;
const ELT_TYPE *ib = (const ELT_TYPE *) draw->pt.user.elts;
const int ibias = draw->pt.user.eltBias;
unsigned i;
assert(icount + !!close <= vsplit->segment_size);
vsplit_clear_cache(vsplit);
spoken = !!spoken;
if (ibias == 0) {
if (spoken)
ADD_CACHE(vsplit, ib, 0, ispoken, 0);
for (i = spoken; i < icount; i++) {
ADD_CACHE(vsplit, ib, istart, i, 0);
}
if (close)
ADD_CACHE(vsplit, ib, 0, iclose, 0);
}
else if (ibias > 0) {
if (spoken)
ADD_CACHE(vsplit, ib, 0, ispoken, ibias);
for (i = spoken; i < icount; i++)
ADD_CACHE(vsplit, ib, istart, i, ibias);
if (close)
ADD_CACHE(vsplit, ib, 0, iclose, ibias);
}
else {
if (spoken) {
ADD_CACHE(vsplit, ib, 0, ispoken, ibias);
}
for (i = spoken; i < icount; i++) {
ADD_CACHE(vsplit, ib, istart, i, ibias);
}
if (close) {
ADD_CACHE(vsplit, ib, 0, iclose, ibias);
}
}
vsplit_flush_cache(vsplit, flags);
}
static void
CONCAT(vsplit_segment_simple_, ELT_TYPE)(struct vsplit_frontend *vsplit,
unsigned flags,
unsigned istart,
unsigned icount)
{
CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
flags, istart, icount, FALSE, 0, FALSE, 0);
}
static void
CONCAT(vsplit_segment_loop_, ELT_TYPE)(struct vsplit_frontend *vsplit,
unsigned flags,
unsigned istart,
unsigned icount,
unsigned i0)
{
const boolean close_loop = ((flags) == DRAW_SPLIT_BEFORE);
CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
flags, istart, icount, FALSE, 0, close_loop, i0);
}
static void
CONCAT(vsplit_segment_fan_, ELT_TYPE)(struct vsplit_frontend *vsplit,
unsigned flags,
unsigned istart,
unsigned icount,
unsigned i0)
{
const boolean use_spoken = (((flags) & DRAW_SPLIT_BEFORE) != 0);
CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
flags, istart, icount, use_spoken, i0, FALSE, 0);
}
#define LOCAL_VARS \
struct vsplit_frontend *vsplit = (struct vsplit_frontend *) frontend; \
const unsigned prim = vsplit->prim; \
const unsigned max_count_simple = vsplit->segment_size; \
const unsigned max_count_loop = vsplit->segment_size - 1; \
const unsigned max_count_fan = vsplit->segment_size;
#define PRIMITIVE(istart, icount) \
CONCAT(vsplit_primitive_, ELT_TYPE)(vsplit, istart, icount)
#else /* ELT_TYPE */
static void
vsplit_segment_simple_linear(struct vsplit_frontend *vsplit, unsigned flags,
unsigned istart, unsigned icount)
{
assert(icount <= vsplit->max_vertices);
vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
}
static void
vsplit_segment_loop_linear(struct vsplit_frontend *vsplit, unsigned flags,
unsigned istart, unsigned icount, unsigned i0)
{
boolean close_loop = (flags == DRAW_SPLIT_BEFORE);
unsigned nr;
assert(icount + !!close_loop <= vsplit->segment_size);
if (close_loop) {
for (nr = 0; nr < icount; nr++)
vsplit->fetch_elts[nr] = istart + nr;
vsplit->fetch_elts[nr++] = i0;
vsplit->middle->run(vsplit->middle, vsplit->fetch_elts, nr,
vsplit->identity_draw_elts, nr, flags);
}
else {
vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
}
}
static void
vsplit_segment_fan_linear(struct vsplit_frontend *vsplit, unsigned flags,
unsigned istart, unsigned icount, unsigned i0)
{
boolean use_spoken = ((flags & DRAW_SPLIT_BEFORE) != 0);
unsigned nr = 0, i;
assert(icount <= vsplit->segment_size);
if (use_spoken) {
/* replace istart by i0 */
vsplit->fetch_elts[nr++] = i0;
for (i = 1 ; i < icount; i++)
vsplit->fetch_elts[nr++] = istart + i;
vsplit->middle->run(vsplit->middle, vsplit->fetch_elts, nr,
vsplit->identity_draw_elts, nr, flags);
}
else {
vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
}
}
#define LOCAL_VARS \
struct vsplit_frontend *vsplit = (struct vsplit_frontend *) frontend; \
const unsigned prim = vsplit->prim; \
const unsigned max_count_simple = vsplit->max_vertices; \
const unsigned max_count_loop = vsplit->segment_size - 1; \
const unsigned max_count_fan = vsplit->segment_size;
#define PRIMITIVE(istart, icount) FALSE
#define ELT_TYPE linear
#endif /* ELT_TYPE */
#define FUNC_VARS \
struct draw_pt_front_end *frontend, \
unsigned start, \
unsigned count
#define SEGMENT_SIMPLE(flags, istart, icount) \
CONCAT(vsplit_segment_simple_, ELT_TYPE)(vsplit, flags, istart, icount)
#define SEGMENT_LOOP(flags, istart, icount, i0) \
CONCAT(vsplit_segment_loop_, ELT_TYPE)(vsplit, flags, istart, icount, i0)
#define SEGMENT_FAN(flags, istart, icount, i0) \
CONCAT(vsplit_segment_fan_, ELT_TYPE)(vsplit, flags, istart, icount, i0)
#include "draw_split_tmp.h"
#undef CONCAT2
#undef CONCAT
#undef ELT_TYPE
#undef ADD_CACHE