322 lines
10 KiB
C
322 lines
10 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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* Copyright (C) 2010 LunarG Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#define CONCAT2(name, elt_type) name ## elt_type
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#define CONCAT(name, elt_type) CONCAT2(name, elt_type)
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#ifdef ELT_TYPE
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/**
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* Fetch all elements in [min_index, max_index] with bias, and use the
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* (rebased) index buffer as the draw elements.
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*/
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static boolean
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CONCAT(vsplit_primitive_, ELT_TYPE)(struct vsplit_frontend *vsplit,
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unsigned istart, unsigned icount)
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{
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struct draw_context *draw = vsplit->draw;
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const ELT_TYPE *ib = (const ELT_TYPE *) draw->pt.user.elts;
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const unsigned min_index = draw->pt.user.min_index;
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const unsigned max_index = draw->pt.user.max_index;
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const int elt_bias = draw->pt.user.eltBias;
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unsigned fetch_start, fetch_count;
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const ushort *draw_elts = NULL;
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unsigned i;
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const unsigned start = istart;
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const unsigned end = istart + icount;
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/* If the index buffer overflows we'll need to run
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* through the normal paths */
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if (start >= draw->pt.user.eltMax ||
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end > draw->pt.user.eltMax ||
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end < istart || end < icount)
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return FALSE;
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/* use the ib directly */
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if (min_index == 0 && sizeof(ib[0]) == sizeof(draw_elts[0])) {
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if (icount > vsplit->max_vertices)
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return FALSE;
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for (i = 0; i < icount; i++) {
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ELT_TYPE idx = DRAW_GET_IDX(ib, start + i);
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if (idx < min_index || idx > max_index) {
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debug_printf("warning: index out of range\n");
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}
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}
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draw_elts = (const ushort *) (ib + istart);
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}
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else {
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/* have to go through vsplit->draw_elts */
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if (icount > vsplit->segment_size)
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return FALSE;
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}
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/* this is faster only when we fetch less elements than the normal path */
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if (max_index - min_index > icount - 1)
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return FALSE;
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if (elt_bias < 0 && (int) min_index < -elt_bias)
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return FALSE;
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/* why this check? */
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for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
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if (draw->pt.vertex_element[i].instance_divisor)
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return FALSE;
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}
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fetch_start = min_index + elt_bias;
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fetch_count = max_index - min_index + 1;
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/* Check for overflow in the fetch_start */
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if (fetch_start < min_index || fetch_start < elt_bias)
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return FALSE;
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if (!draw_elts) {
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if (min_index == 0) {
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for (i = 0; i < icount; i++) {
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ELT_TYPE idx = DRAW_GET_IDX(ib, i + start);
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if (idx < min_index || idx > max_index) {
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debug_printf("warning: index out of range\n");
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}
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vsplit->draw_elts[i] = (ushort) idx;
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}
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}
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else {
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for (i = 0; i < icount; i++) {
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ELT_TYPE idx = DRAW_GET_IDX(ib, i + start);
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if (idx < min_index || idx > max_index) {
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debug_printf("warning: index out of range\n");
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}
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vsplit->draw_elts[i] = (ushort) (idx - min_index);
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}
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}
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draw_elts = vsplit->draw_elts;
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}
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return vsplit->middle->run_linear_elts(vsplit->middle,
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fetch_start, fetch_count,
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draw_elts, icount, 0x0);
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}
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/**
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* Use the cache to prepare the fetch and draw elements, and flush.
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*
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* When spoken is TRUE, ispoken replaces istart; When close is TRUE, iclose is
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* appended.
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*/
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static INLINE void
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CONCAT(vsplit_segment_cache_, ELT_TYPE)(struct vsplit_frontend *vsplit,
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unsigned flags,
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unsigned istart, unsigned icount,
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boolean spoken, unsigned ispoken,
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boolean close, unsigned iclose)
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{
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struct draw_context *draw = vsplit->draw;
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const ELT_TYPE *ib = (const ELT_TYPE *) draw->pt.user.elts;
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const int ibias = draw->pt.user.eltBias;
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unsigned i;
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assert(icount + !!close <= vsplit->segment_size);
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vsplit_clear_cache(vsplit);
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spoken = !!spoken;
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if (ibias == 0) {
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if (spoken)
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ADD_CACHE(vsplit, ib, 0, ispoken, 0);
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for (i = spoken; i < icount; i++) {
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ADD_CACHE(vsplit, ib, istart, i, 0);
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}
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if (close)
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ADD_CACHE(vsplit, ib, 0, iclose, 0);
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}
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else if (ibias > 0) {
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if (spoken)
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ADD_CACHE(vsplit, ib, 0, ispoken, ibias);
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for (i = spoken; i < icount; i++)
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ADD_CACHE(vsplit, ib, istart, i, ibias);
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if (close)
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ADD_CACHE(vsplit, ib, 0, iclose, ibias);
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}
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else {
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if (spoken) {
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ADD_CACHE(vsplit, ib, 0, ispoken, ibias);
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}
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for (i = spoken; i < icount; i++) {
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ADD_CACHE(vsplit, ib, istart, i, ibias);
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}
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if (close) {
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ADD_CACHE(vsplit, ib, 0, iclose, ibias);
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}
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}
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vsplit_flush_cache(vsplit, flags);
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}
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static void
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CONCAT(vsplit_segment_simple_, ELT_TYPE)(struct vsplit_frontend *vsplit,
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unsigned flags,
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unsigned istart,
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unsigned icount)
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{
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CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
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flags, istart, icount, FALSE, 0, FALSE, 0);
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}
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static void
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CONCAT(vsplit_segment_loop_, ELT_TYPE)(struct vsplit_frontend *vsplit,
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unsigned flags,
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unsigned istart,
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unsigned icount,
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unsigned i0)
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{
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const boolean close_loop = ((flags) == DRAW_SPLIT_BEFORE);
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CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
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flags, istart, icount, FALSE, 0, close_loop, i0);
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}
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static void
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CONCAT(vsplit_segment_fan_, ELT_TYPE)(struct vsplit_frontend *vsplit,
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unsigned flags,
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unsigned istart,
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unsigned icount,
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unsigned i0)
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{
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const boolean use_spoken = (((flags) & DRAW_SPLIT_BEFORE) != 0);
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CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
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flags, istart, icount, use_spoken, i0, FALSE, 0);
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}
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#define LOCAL_VARS \
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struct vsplit_frontend *vsplit = (struct vsplit_frontend *) frontend; \
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const unsigned prim = vsplit->prim; \
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const unsigned max_count_simple = vsplit->segment_size; \
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const unsigned max_count_loop = vsplit->segment_size - 1; \
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const unsigned max_count_fan = vsplit->segment_size;
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#define PRIMITIVE(istart, icount) \
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CONCAT(vsplit_primitive_, ELT_TYPE)(vsplit, istart, icount)
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#else /* ELT_TYPE */
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static void
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vsplit_segment_simple_linear(struct vsplit_frontend *vsplit, unsigned flags,
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unsigned istart, unsigned icount)
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{
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assert(icount <= vsplit->max_vertices);
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vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
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}
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static void
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vsplit_segment_loop_linear(struct vsplit_frontend *vsplit, unsigned flags,
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unsigned istart, unsigned icount, unsigned i0)
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{
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boolean close_loop = (flags == DRAW_SPLIT_BEFORE);
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unsigned nr;
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assert(icount + !!close_loop <= vsplit->segment_size);
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if (close_loop) {
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for (nr = 0; nr < icount; nr++)
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vsplit->fetch_elts[nr] = istart + nr;
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vsplit->fetch_elts[nr++] = i0;
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vsplit->middle->run(vsplit->middle, vsplit->fetch_elts, nr,
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vsplit->identity_draw_elts, nr, flags);
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}
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else {
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vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
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}
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}
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static void
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vsplit_segment_fan_linear(struct vsplit_frontend *vsplit, unsigned flags,
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unsigned istart, unsigned icount, unsigned i0)
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{
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boolean use_spoken = ((flags & DRAW_SPLIT_BEFORE) != 0);
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unsigned nr = 0, i;
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assert(icount <= vsplit->segment_size);
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if (use_spoken) {
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/* replace istart by i0 */
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vsplit->fetch_elts[nr++] = i0;
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for (i = 1 ; i < icount; i++)
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vsplit->fetch_elts[nr++] = istart + i;
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vsplit->middle->run(vsplit->middle, vsplit->fetch_elts, nr,
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vsplit->identity_draw_elts, nr, flags);
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}
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else {
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vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
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}
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}
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#define LOCAL_VARS \
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struct vsplit_frontend *vsplit = (struct vsplit_frontend *) frontend; \
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const unsigned prim = vsplit->prim; \
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const unsigned max_count_simple = vsplit->max_vertices; \
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const unsigned max_count_loop = vsplit->segment_size - 1; \
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const unsigned max_count_fan = vsplit->segment_size;
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#define PRIMITIVE(istart, icount) FALSE
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#define ELT_TYPE linear
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#endif /* ELT_TYPE */
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#define FUNC_VARS \
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struct draw_pt_front_end *frontend, \
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unsigned start, \
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unsigned count
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#define SEGMENT_SIMPLE(flags, istart, icount) \
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CONCAT(vsplit_segment_simple_, ELT_TYPE)(vsplit, flags, istart, icount)
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#define SEGMENT_LOOP(flags, istart, icount, i0) \
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CONCAT(vsplit_segment_loop_, ELT_TYPE)(vsplit, flags, istart, icount, i0)
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#define SEGMENT_FAN(flags, istart, icount, i0) \
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CONCAT(vsplit_segment_fan_, ELT_TYPE)(vsplit, flags, istart, icount, i0)
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#include "draw_split_tmp.h"
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#undef CONCAT2
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#undef CONCAT
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#undef ELT_TYPE
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#undef ADD_CACHE
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