reactos/dll/opengl/mesa/src/gallium/auxiliary/draw/draw_pt_vsplit_tmp.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   6  * Copyright (C) 2010 LunarG Inc.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #define CONCAT2(name, elt_type) name ## elt_type
  28 #define CONCAT(name, elt_type) CONCAT2(name, elt_type)
  29
  30 #ifdef ELT_TYPE
  31
  32 /**
  33  * Fetch all elements in [min_index, max_index] with bias, and use the
  34  * (rebased) index buffer as the draw elements.
  35  */
  36 static boolean
  37 CONCAT(vsplit_primitive_, ELT_TYPE)(struct vsplit_frontend *vsplit,
  38                                     unsigned istart, unsigned icount)
  39 {
  40    struct draw_context *draw = vsplit->draw;
  41    const ELT_TYPE *ib = (const ELT_TYPE *)
  42       ((const char *) draw->pt.user.elts + draw->pt.index_buffer.offset);
  43    const unsigned min_index = draw->pt.user.min_index;
  44    const unsigned max_index = draw->pt.user.max_index;
  45    const int elt_bias = draw->pt.user.eltBias;
  46    unsigned fetch_start, fetch_count;
  47    const ushort *draw_elts = NULL;
  48    unsigned i;
  49
  50    ib += istart;
  51
  52    /* use the ib directly */
  53    if (min_index == 0 && sizeof(ib[0]) == sizeof(draw_elts[0])) {
  54       if (icount > vsplit->max_vertices)
  55          return FALSE;
  56
  57       for (i = 0; i < icount; i++) {
  58          ELT_TYPE idx = ib[i];
  59             if (idx < min_index || idx > max_index) {
  60             debug_printf("warning: index out of range\n");
  61          }
  62       }
  63       draw_elts = (const ushort *) ib;
  64    }
  65    else {
  66       /* have to go through vsplit->draw_elts */
  67       if (icount > vsplit->segment_size)
  68          return FALSE;
  69    }
  70
  71    /* this is faster only when we fetch less elements than the normal path */
  72    if (max_index - min_index > icount - 1)
  73       return FALSE;
  74
  75    if (elt_bias < 0 && min_index < -elt_bias)
  76       return FALSE;
  77
  78    /* why this check? */
  79    for (i = 0; i < draw->pt.nr_vertex_elements; i++) {
  80       if (draw->pt.vertex_element[i].instance_divisor)
  81          return FALSE;
  82    }
  83
  84    fetch_start = min_index + elt_bias;
  85    fetch_count = max_index - min_index + 1;
  86
  87    if (!draw_elts) {
  88       if (min_index == 0) {
  89          for (i = 0; i < icount; i++) {
  90             ELT_TYPE idx = ib[i];
  91
  92             if (idx < min_index || idx > max_index) {
  93                debug_printf("warning: index out of range\n");
  94             }
  95             vsplit->draw_elts[i] = (ushort) idx;
  96          }
  97       }
  98       else {
  99          for (i = 0; i < icount; i++) {
 100             ELT_TYPE idx = ib[i];
 101
 102             if (idx < min_index || idx > max_index) {
 103                debug_printf("warning: index out of range\n");
 104             }
 105             vsplit->draw_elts[i] = (ushort) (idx - min_index);
 106          }
 107       }
 108
 109       draw_elts = vsplit->draw_elts;
 110    }
 111
 112    return vsplit->middle->run_linear_elts(vsplit->middle,
 113                                           fetch_start, fetch_count,
 114                                           draw_elts, icount, 0x0);
 115 }
 116
 117 /**
 118  * Use the cache to prepare the fetch and draw elements, and flush.
 119  *
 120  * When spoken is TRUE, ispoken replaces istart;  When close is TRUE, iclose is
 121  * appended.
 122  */
 123 static INLINE void
 124 CONCAT(vsplit_segment_cache_, ELT_TYPE)(struct vsplit_frontend *vsplit,
 125                                         unsigned flags,
 126                                         unsigned istart, unsigned icount,
 127                                         boolean spoken, unsigned ispoken,
 128                                         boolean close, unsigned iclose)
 129 {
 130    struct draw_context *draw = vsplit->draw;
 131    const ELT_TYPE *ib = (const ELT_TYPE *)
 132       ((const char *) draw->pt.user.elts + draw->pt.index_buffer.offset);
 133    const int ibias = draw->pt.user.eltBias;
 134    unsigned i;
 135
 136    assert(icount + !!close <= vsplit->segment_size);
 137
 138    vsplit_clear_cache(vsplit);
 139
 140    spoken = !!spoken;
 141    if (ibias == 0) {
 142       if (spoken)
 143          ADD_CACHE(vsplit, ib[ispoken]);
 144
 145       for (i = spoken; i < icount; i++)
 146          ADD_CACHE(vsplit, ib[istart + i]);
 147
 148       if (close)
 149          ADD_CACHE(vsplit, ib[iclose]);
 150    }
 151    else if (ibias > 0) {
 152       if (spoken)
 153          ADD_CACHE(vsplit, (uint) ib[ispoken] + ibias);
 154
 155       for (i = spoken; i < icount; i++)
 156          ADD_CACHE(vsplit, (uint) ib[istart + i] + ibias);
 157
 158       if (close)
 159          ADD_CACHE(vsplit, (uint) ib[iclose] + ibias);
 160    }
 161    else {
 162       if (spoken) {
 163          if (ib[ispoken] < -ibias)
 164             return;
 165          ADD_CACHE(vsplit, ib[ispoken] + ibias);
 166       }
 167
 168       for (i = spoken; i < icount; i++) {
 169          if (ib[istart + i] < -ibias)
 170             return;
 171          ADD_CACHE(vsplit, ib[istart + i] + ibias);
 172       }
 173
 174       if (close) {
 175          if (ib[iclose] < -ibias)
 176             return;
 177          ADD_CACHE(vsplit, ib[iclose] + ibias);
 178       }
 179    }
 180
 181    vsplit_flush_cache(vsplit, flags);
 182 }
 183
 184 static void
 185 CONCAT(vsplit_segment_simple_, ELT_TYPE)(struct vsplit_frontend *vsplit,
 186                                          unsigned flags,
 187                                          unsigned istart,
 188                                          unsigned icount)
 189 {
 190    CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
 191          flags, istart, icount, FALSE, 0, FALSE, 0);
 192 }
 193
 194 static void
 195 CONCAT(vsplit_segment_loop_, ELT_TYPE)(struct vsplit_frontend *vsplit,
 196                                        unsigned flags,
 197                                        unsigned istart,
 198                                        unsigned icount,
 199                                        unsigned i0)
 200 {
 201    const boolean close_loop = ((flags) == DRAW_SPLIT_BEFORE);
 202
 203    CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
 204          flags, istart, icount, FALSE, 0, close_loop, i0);
 205 }
 206
 207 static void
 208 CONCAT(vsplit_segment_fan_, ELT_TYPE)(struct vsplit_frontend *vsplit,
 209                                       unsigned flags,
 210                                       unsigned istart,
 211                                       unsigned icount,
 212                                       unsigned i0)
 213 {
 214    const boolean use_spoken = (((flags) & DRAW_SPLIT_BEFORE) != 0);
 215
 216    CONCAT(vsplit_segment_cache_, ELT_TYPE)(vsplit,
 217          flags, istart, icount, use_spoken, i0, FALSE, 0);
 218 }
 219
 220 #define LOCAL_VARS                                                         \
 221    struct vsplit_frontend *vsplit = (struct vsplit_frontend *) frontend;   \
 222    const unsigned prim = vsplit->prim;                                     \
 223    const unsigned max_count_simple = vsplit->segment_size;                 \
 224    const unsigned max_count_loop = vsplit->segment_size - 1;               \
 225    const unsigned max_count_fan = vsplit->segment_size;
 226
 227 #define PRIMITIVE(istart, icount)   \
 228    CONCAT(vsplit_primitive_, ELT_TYPE)(vsplit, istart, icount)
 229
 230 #else /* ELT_TYPE */
 231
 232 static void
 233 vsplit_segment_simple_linear(struct vsplit_frontend *vsplit, unsigned flags,
 234                              unsigned istart, unsigned icount)
 235 {
 236    assert(icount <= vsplit->max_vertices);
 237    vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
 238 }
 239
 240 static void
 241 vsplit_segment_loop_linear(struct vsplit_frontend *vsplit, unsigned flags,
 242                            unsigned istart, unsigned icount, unsigned i0)
 243 {
 244    boolean close_loop = (flags == DRAW_SPLIT_BEFORE);
 245    unsigned nr;
 246
 247    assert(icount + !!close_loop <= vsplit->segment_size);
 248
 249    if (close_loop) {
 250       for (nr = 0; nr < icount; nr++)
 251          vsplit->fetch_elts[nr] = istart + nr;
 252       vsplit->fetch_elts[nr++] = i0;
 253
 254       vsplit->middle->run(vsplit->middle, vsplit->fetch_elts, nr,
 255             vsplit->identity_draw_elts, nr, flags);
 256    }
 257    else {
 258       vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
 259    }
 260 }
 261
 262 static void
 263 vsplit_segment_fan_linear(struct vsplit_frontend *vsplit, unsigned flags,
 264                           unsigned istart, unsigned icount, unsigned i0)
 265 {
 266    boolean use_spoken = ((flags & DRAW_SPLIT_BEFORE) != 0);
 267    unsigned nr = 0, i;
 268
 269    assert(icount <= vsplit->segment_size);
 270
 271    if (use_spoken) {
 272       /* replace istart by i0 */
 273       vsplit->fetch_elts[nr++] = i0;
 274       for (i = 1 ; i < icount; i++)
 275          vsplit->fetch_elts[nr++] = istart + i;
 276
 277       vsplit->middle->run(vsplit->middle, vsplit->fetch_elts, nr,
 278             vsplit->identity_draw_elts, nr, flags);
 279    }
 280    else {
 281       vsplit->middle->run_linear(vsplit->middle, istart, icount, flags);
 282    }
 283 }
 284
 285 #define LOCAL_VARS                                                         \
 286    struct vsplit_frontend *vsplit = (struct vsplit_frontend *) frontend;   \
 287    const unsigned prim = vsplit->prim;                                     \
 288    const unsigned max_count_simple = vsplit->max_vertices;                 \
 289    const unsigned max_count_loop = vsplit->segment_size - 1;               \
 290    const unsigned max_count_fan = vsplit->segment_size;
 291
 292 #define PRIMITIVE(istart, icount) FALSE
 293
 294 #define ELT_TYPE linear
 295
 296 #endif /* ELT_TYPE */
 297
 298 #define FUNC_VARS                      \
 299    struct draw_pt_front_end *frontend, \
 300    unsigned start,                     \
 301    unsigned count
 302
 303 #define SEGMENT_SIMPLE(flags, istart, icount)   \
 304    CONCAT(vsplit_segment_simple_, ELT_TYPE)(vsplit, flags, istart, icount)
 305
 306 #define SEGMENT_LOOP(flags, istart, icount, i0) \
 307    CONCAT(vsplit_segment_loop_, ELT_TYPE)(vsplit, flags, istart, icount, i0)
 308
 309 #define SEGMENT_FAN(flags, istart, icount, i0)  \
 310    CONCAT(vsplit_segment_fan_, ELT_TYPE)(vsplit, flags, istart, icount, i0)
 311
 312 #include "draw_split_tmp.h"
 313
 314 #undef CONCAT2
 315 #undef CONCAT
 316
 317 #undef ELT_TYPE
 318 #undef ADD_CACHE