src/gallium/drivers/i965/brw_draw.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "util/u_inlines.h"
  30 #include "util/u_prim.h"
  31 #include "util/u_upload_mgr.h"
  32 #include "util/u_draw_quad.h"
  33
  34 #include "brw_draw.h"
  35 #include "brw_defines.h"
  36 #include "brw_context.h"
  37 #include "brw_state.h"
  38 #include "brw_debug.h"
  39
  40 #include "brw_batchbuffer.h"
  41
  42
  43 static uint32_t prim_to_hw_prim[PIPE_PRIM_POLYGON+1] = {
  44    _3DPRIM_POINTLIST,
  45    _3DPRIM_LINELIST,
  46    _3DPRIM_LINELOOP,
  47    _3DPRIM_LINESTRIP,
  48    _3DPRIM_TRILIST,
  49    _3DPRIM_TRISTRIP,
  50    _3DPRIM_TRIFAN,
  51    _3DPRIM_QUADLIST,
  52    _3DPRIM_QUADSTRIP,
  53    _3DPRIM_POLYGON
  54 };
  55
  56
  57
  58 /* When the primitive changes, set a state bit and re-validate.  Not
  59  * the nicest and would rather deal with this by having all the
  60  * programs be immune to the active primitive (ie. cope with all
  61  * possibilities).  That may not be realistic however.
  62  */
  63 static int brw_set_prim(struct brw_context *brw, unsigned prim )
  64 {
  65
  66    if (BRW_DEBUG & DEBUG_PRIMS)
  67       debug_printf("PRIM: %s\n", u_prim_name(prim));
  68
  69    if (prim != brw->primitive) {
  70       unsigned reduced_prim;
  71
  72       brw->primitive = prim;
  73       brw->state.dirty.brw |= BRW_NEW_PRIMITIVE;
  74
  75       reduced_prim = u_reduced_prim(prim);
  76       if (reduced_prim != brw->reduced_primitive) {
  77          brw->reduced_primitive = reduced_prim;
  78          brw->state.dirty.brw |= BRW_NEW_REDUCED_PRIMITIVE;
  79       }
  80    }
  81
  82    return prim_to_hw_prim[prim];
  83 }
  84
  85
  86
  87 static int brw_emit_prim(struct brw_context *brw,
  88                          unsigned start,
  89                          unsigned count,
  90                          boolean indexed,
  91                          uint32_t hw_prim)
  92 {
  93    struct brw_3d_primitive prim_packet;
  94    int ret;
  95
  96    if (BRW_DEBUG & DEBUG_PRIMS)
  97       debug_printf("%s start %d count %d indexed %d hw_prim %d\n",
  98                    __FUNCTION__, start, count, indexed, hw_prim);
  99
 100    prim_packet.header.opcode = CMD_3D_PRIM;
 101    prim_packet.header.length = sizeof(prim_packet)/4 - 2;
 102    prim_packet.header.pad = 0;
 103    prim_packet.header.topology = hw_prim;
 104    prim_packet.header.indexed = indexed;
 105
 106    prim_packet.verts_per_instance = count;
 107    prim_packet.start_vert_location = start;
 108    if (indexed)
 109       prim_packet.start_vert_location += brw->ib.start_vertex_offset;
 110    prim_packet.instance_count = 1;
 111    prim_packet.start_instance_location = 0;
 112    prim_packet.base_vert_location = 0; /* prim->basevertex; XXX: add this to gallium */
 113
 114
 115    /* If we're set to always flush, do it before and after the primitive emit.
 116     * We want to catch both missed flushes that hurt instruction/state cache
 117     * and missed flushes of the render cache as it heads to other parts of
 118     * the besides the draw code.
 119     */
 120    if (0) {
 121       BEGIN_BATCH(1, IGNORE_CLIPRECTS);
 122       OUT_BATCH((CMD_MI_FLUSH << 16) | BRW_FLUSH_STATE_CACHE);
 123       ADVANCE_BATCH();
 124    }
 125    if (prim_packet.verts_per_instance) {
 126       ret = brw_batchbuffer_data( brw->batch, &prim_packet,
 127                                   sizeof(prim_packet), LOOP_CLIPRECTS);
 128       if (ret)
 129          return ret;
 130    }
 131    if (0) {
 132       BEGIN_BATCH(1, IGNORE_CLIPRECTS);
 133       OUT_BATCH((CMD_MI_FLUSH << 16) | BRW_FLUSH_STATE_CACHE);
 134       ADVANCE_BATCH();
 135    }
 136
 137    return 0;
 138 }
 139
 140
 141 /* May fail if out of video memory for texture or vbo upload, or on
 142  * fallback conditions.
 143  */
 144 static int
 145 try_draw_range_elements(struct brw_context *brw,
 146                         boolean indexed,
 147                         unsigned hw_prim,
 148                         unsigned start, unsigned count)
 149 {
 150    int ret;
 151
 152    ret = brw_validate_state(brw);
 153    if (ret)
 154       return ret;
 155
 156    /* Check that we can fit our state in with our existing batchbuffer, or
 157     * flush otherwise.
 158     */
 159    ret = brw->sws->check_aperture_space(brw->sws,
 160                                         brw->state.validated_bos,
 161                                         brw->state.validated_bo_count);
 162    if (ret)
 163       return ret;
 164
 165    ret = brw_upload_state(brw);
 166    if (ret)
 167       return ret;
 168
 169    ret = brw_emit_prim(brw, start, count, indexed, hw_prim);
 170    if (ret)
 171       return ret;
 172
 173    if (brw->flags.always_flush_batch)
 174       brw_context_flush( brw );
 175
 176    return 0;
 177 }
 178
 179
 180 static void
 181 brw_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 182 {
 183    struct brw_context *brw = brw_context(pipe);
 184    int ret;
 185    uint32_t hw_prim;
 186
 187    hw_prim = brw_set_prim(brw, info->mode);
 188
 189    if (BRW_DEBUG & DEBUG_PRIMS)
 190       debug_printf("PRIM: %s start %d count %d index_buffer %p\n",
 191                    u_prim_name(info->mode), info->start, info->count,
 192                    (void *) brw->curr.index_buffer);
 193
 194    assert(info->index_bias == 0);
 195
 196    /* Potentially trigger upload of new index buffer range.
 197     * XXX: do we really care?
 198     */
 199    if (brw->curr.min_index != info->min_index ||
 200        brw->curr.max_index != info->max_index)
 201    {
 202       brw->curr.min_index = info->min_index;
 203       brw->curr.max_index = info->max_index;
 204       brw->state.dirty.mesa |= PIPE_NEW_INDEX_RANGE;
 205    }
 206
 207
 208    /* Make a first attempt at drawing:
 209     */
 210    ret = try_draw_range_elements(brw, info->indexed,
 211          hw_prim, info->start, info->count);
 212
 213    /* Otherwise, flush and retry:
 214     */
 215    if (ret != 0) {
 216       brw_context_flush( brw );
 217       ret = try_draw_range_elements(brw, info->indexed,
 218             hw_prim, info->start, info->count);
 219       assert(ret == 0);
 220    }
 221 }
 222
 223 static void
 224 brw_draw_range_elements(struct pipe_context *pipe,
 225                         struct pipe_resource *index_buffer,
 226                         unsigned index_size, int index_bias,
 227                         unsigned min_index,
 228                         unsigned max_index,
 229                         unsigned mode, unsigned start, unsigned count)
 230 {
 231    struct brw_context *brw = brw_context(pipe);
 232    struct pipe_draw_info info;
 233    struct pipe_index_buffer saved_ib, ib;
 234
 235    util_draw_init_info(&info);
 236    info.mode = mode;
 237    info.start = start;
 238    info.count = count;
 239    info.index_bias = index_bias;
 240    info.min_index = min_index;
 241    info.max_index = max_index;
 242
 243    if (index_buffer) {
 244       info.indexed = TRUE;
 245       saved_ib.buffer = brw->curr.index_buffer;
 246       saved_ib.offset = brw->curr.index_offset;
 247       saved_ib.index_size = brw->curr.index_size;
 248
 249       ib.buffer = index_buffer;
 250       ib.offset = 0;
 251       ib.index_size = index_size;
 252       pipe->set_index_buffer(pipe, &ib);
 253    }
 254
 255    brw_draw_vbo(pipe, &info);
 256
 257    if (index_buffer)
 258       pipe->set_index_buffer(pipe, &saved_ib);
 259 }
 260
 261 static void
 262 brw_draw_elements(struct pipe_context *pipe,
 263                   struct pipe_resource *index_buffer,
 264                   unsigned index_size, int index_bias,
 265                   unsigned mode,
 266                   unsigned start, unsigned count)
 267 {
 268    brw_draw_range_elements( pipe, index_buffer,
 269                             index_size, index_bias,
 270                             0, 0xffffffff,
 271                             mode,
 272                             start, count );
 273 }
 274
 275 static void
 276 brw_draw_arrays(struct pipe_context *pipe, unsigned mode,
 277                      unsigned start, unsigned count)
 278 {
 279    brw_draw_elements(pipe, NULL, 0, 0, mode, start, count);
 280 }
 281
 282
 283
 284 boolean brw_draw_init( struct brw_context *brw )
 285 {
 286    /* Register our drawing function:
 287     */
 288    brw->base.draw_arrays = brw_draw_arrays;
 289    brw->base.draw_elements = brw_draw_elements;
 290    brw->base.draw_range_elements = brw_draw_range_elements;
 291    brw->base.draw_vbo = brw_draw_vbo;
 292
 293    /* Create helpers for uploading data in user buffers:
 294     */
 295    brw->vb.upload_vertex = u_upload_create( &brw->base,
 296                                             128 * 1024,
 297                                             64,
 298                                             PIPE_BIND_VERTEX_BUFFER );
 299    if (brw->vb.upload_vertex == NULL)
 300       return FALSE;
 301
 302    brw->vb.upload_index = u_upload_create( &brw->base,
 303                                            32 * 1024,
 304                                            64,
 305                                            PIPE_BIND_INDEX_BUFFER );
 306    if (brw->vb.upload_index == NULL)
 307       return FALSE;
 308
 309    return TRUE;
 310 }
 311
 312 void brw_draw_cleanup( struct brw_context *brw )
 313 {
 314    u_upload_destroy( brw->vb.upload_vertex );
 315    u_upload_destroy( brw->vb.upload_index );
 316
 317    bo_reference(&brw->ib.bo, NULL);
 318 }