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_prim.h"
  30 #include "util/u_upload_mgr.h"
  31
  32 #include "brw_draw.h"
  33 #include "brw_defines.h"
  34 #include "brw_context.h"
  35 #include "brw_state.h"
  36 #include "brw_debug.h"
  37 #include "brw_screen.h"
  38
  39 #include "brw_batchbuffer.h"
  40
  41
  42 static uint32_t prim_to_hw_prim[PIPE_PRIM_POLYGON+1] = {
  43    _3DPRIM_POINTLIST,
  44    _3DPRIM_LINELIST,
  45    _3DPRIM_LINELOOP,
  46    _3DPRIM_LINESTRIP,
  47    _3DPRIM_TRILIST,
  48    _3DPRIM_TRISTRIP,
  49    _3DPRIM_TRIFAN,
  50    _3DPRIM_QUADLIST,
  51    _3DPRIM_QUADSTRIP,
  52    _3DPRIM_POLYGON
  53 };
  54
  55
  56
  57 /* When the primitive changes, set a state bit and re-validate.  Not
  58  * the nicest and would rather deal with this by having all the
  59  * programs be immune to the active primitive (ie. cope with all
  60  * possibilities).  That may not be realistic however.
  61  */
  62 static int brw_set_prim(struct brw_context *brw, unsigned prim )
  63 {
  64
  65    if (BRW_DEBUG & DEBUG_PRIMS)
  66       debug_printf("PRIM: %s\n", u_prim_name(prim));
  67
  68    if (prim != brw->primitive) {
  69       unsigned reduced_prim;
  70
  71       brw->primitive = prim;
  72       brw->state.dirty.brw |= BRW_NEW_PRIMITIVE;
  73
  74       reduced_prim = u_reduced_prim(prim);
  75       if (reduced_prim != brw->reduced_primitive) {
  76          brw->reduced_primitive = reduced_prim;
  77          brw->state.dirty.brw |= BRW_NEW_REDUCED_PRIMITIVE;
  78       }
  79    }
  80
  81    return prim_to_hw_prim[prim];
  82 }
  83
  84
  85
  86 static int brw_emit_prim(struct brw_context *brw,
  87                          unsigned start,
  88                          unsigned count,
  89                          boolean indexed,
  90                          uint32_t hw_prim)
  91 {
  92    struct brw_3d_primitive prim_packet;
  93    int ret;
  94
  95    prim_packet.header.opcode = CMD_3D_PRIM;
  96    prim_packet.header.length = sizeof(prim_packet)/4 - 2;
  97    prim_packet.header.pad = 0;
  98    prim_packet.header.topology = hw_prim;
  99    prim_packet.header.indexed = indexed;
 100
 101    prim_packet.verts_per_instance = count;
 102    prim_packet.start_vert_location = start;
 103    if (indexed)
 104       prim_packet.start_vert_location += brw->ib.start_vertex_offset;
 105    prim_packet.instance_count = 1;
 106    prim_packet.start_instance_location = 0;
 107    prim_packet.base_vert_location = 0; // prim->basevertex; XXX: add this to gallium
 108
 109
 110    /* If we're set to always flush, do it before and after the primitive emit.
 111     * We want to catch both missed flushes that hurt instruction/state cache
 112     * and missed flushes of the render cache as it heads to other parts of
 113     * the besides the draw code.
 114     */
 115    if (0) {
 116       BEGIN_BATCH(1, IGNORE_CLIPRECTS);
 117       OUT_BATCH((CMD_MI_FLUSH << 16) | BRW_FLUSH_STATE_CACHE);
 118       ADVANCE_BATCH();
 119    }
 120    if (prim_packet.verts_per_instance) {
 121       ret = brw_batchbuffer_data( brw->batch, &prim_packet,
 122                                   sizeof(prim_packet), LOOP_CLIPRECTS);
 123       if (ret)
 124          return ret;
 125    }
 126    if (0) {
 127       BEGIN_BATCH(1, IGNORE_CLIPRECTS);
 128       OUT_BATCH((CMD_MI_FLUSH << 16) | BRW_FLUSH_STATE_CACHE);
 129       ADVANCE_BATCH();
 130    }
 131
 132    return 0;
 133 }
 134
 135
 136 /* May fail if out of video memory for texture or vbo upload, or on
 137  * fallback conditions.
 138  */
 139 static int
 140 try_draw_range_elements(struct brw_context *brw,
 141                         struct pipe_buffer *index_buffer,
 142                         unsigned hw_prim,
 143                         unsigned start, unsigned count)
 144 {
 145    int ret;
 146
 147    ret = brw_validate_state(brw);
 148    if (ret)
 149       return ret;
 150
 151    /* Check that we can fit our state in with our existing batchbuffer, or
 152     * flush otherwise.
 153     */
 154    ret = brw->sws->check_aperture_space(brw->sws,
 155                                         brw->state.validated_bos,
 156                                         brw->state.validated_bo_count);
 157    if (ret)
 158       return ret;
 159
 160    ret = brw_upload_state(brw);
 161    if (ret)
 162       return ret;
 163
 164    ret = brw_emit_prim(brw, start, count, index_buffer != NULL, hw_prim);
 165    if (ret)
 166       return ret;
 167
 168    if (brw->flags.always_flush_batch)
 169       brw_context_flush( brw );
 170
 171    return 0;
 172 }
 173
 174
 175 static boolean
 176 brw_draw_range_elements(struct pipe_context *pipe,
 177                         struct pipe_buffer *index_buffer,
 178                         unsigned index_size,
 179                         unsigned min_index,
 180                         unsigned max_index,
 181                         unsigned mode, unsigned start, unsigned count)
 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, mode);
 188
 189    if (BRW_DEBUG & DEBUG_PRIMS)
 190       debug_printf("PRIM: %s %d %d\n", u_prim_name(mode), start, count);
 191
 192    /* Potentially trigger upload of new index buffer.
 193     *
 194     * XXX: do we need to go through state validation to achieve this?
 195     * Could just call upload code directly.
 196     */
 197    if (brw->curr.index_buffer != index_buffer) {
 198       pipe_buffer_reference( &brw->curr.index_buffer, index_buffer );
 199       brw->state.dirty.mesa |= PIPE_NEW_INDEX_BUFFER;
 200    }
 201
 202    /* XXX: do we really care?
 203     */
 204    if (brw->curr.min_index != min_index ||
 205        brw->curr.max_index != max_index)
 206    {
 207       brw->curr.min_index = min_index;
 208       brw->curr.max_index = max_index;
 209       brw->state.dirty.mesa |= PIPE_NEW_INDEX_RANGE;
 210    }
 211
 212
 213    /* Make a first attempt at drawing:
 214     */
 215    ret = try_draw_range_elements(brw, index_buffer, hw_prim, start, count );
 216
 217    /* Otherwise, flush and retry:
 218     */
 219    if (ret != 0) {
 220       brw_context_flush( brw );
 221       ret = try_draw_range_elements(brw, index_buffer, hw_prim, start, count );
 222       assert(ret == 0);
 223    }
 224
 225    return TRUE;
 226 }
 227
 228 static boolean
 229 brw_draw_elements(struct pipe_context *pipe,
 230                   struct pipe_buffer *index_buffer,
 231                   unsigned index_size,
 232                   unsigned mode,
 233                   unsigned start, unsigned count)
 234 {
 235    return brw_draw_range_elements( pipe, index_buffer,
 236                                    index_size,
 237                                    0, 0xffffffff,
 238                                    mode,
 239                                    start, count );
 240 }
 241
 242 static boolean
 243 brw_draw_arrays(struct pipe_context *pipe, unsigned mode,
 244                      unsigned start, unsigned count)
 245 {
 246    return brw_draw_elements(pipe, NULL, 0, mode, start, count);
 247 }
 248
 249
 250
 251 boolean brw_draw_init( struct brw_context *brw )
 252 {
 253    /* Register our drawing function:
 254     */
 255    brw->base.draw_arrays = brw_draw_arrays;
 256    brw->base.draw_elements = brw_draw_elements;
 257    brw->base.draw_range_elements = brw_draw_range_elements;
 258
 259    /* Create helpers for uploading data in user buffers:
 260     */
 261    brw->vb.upload_vertex = u_upload_create( brw->base.screen,
 262                                             128 * 1024,
 263                                             64,
 264                                             PIPE_BUFFER_USAGE_VERTEX );
 265    if (brw->vb.upload_vertex == NULL)
 266       return FALSE;
 267
 268    brw->vb.upload_index = u_upload_create( brw->base.screen,
 269                                            128 * 1024,
 270                                            64,
 271                                            PIPE_BUFFER_USAGE_INDEX );
 272    if (brw->vb.upload_index == NULL)
 273       return FALSE;
 274
 275    return TRUE;
 276 }
 277
 278 void brw_draw_cleanup( struct brw_context *brw )
 279 {
 280    u_upload_destroy( brw->vb.upload_vertex );
 281    u_upload_destroy( brw->vb.upload_index );
 282
 283    bo_reference(&brw->ib.bo, NULL);
 284 }