src/gallium/drivers/softpipe/sp_draw_arrays.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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 /* Author:
  29  *    Brian Paul
  30  *    Keith Whitwell
  31  */
  32
  33
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_context.h"
  36 #include "util/u_simple_screen.h"
  37 #include "util/u_inlines.h"
  38 #include "util/u_prim.h"
  39
  40 #include "sp_context.h"
  41 #include "sp_query.h"
  42 #include "sp_state.h"
  43 #include "sp_buffer.h"
  44
  45 #include "draw/draw_context.h"
  46
  47
  48
  49
  50
  51
  52 /**
  53  * Draw vertex arrays, with optional indexing.
  54  * Basically, map the vertex buffers (and drawing surfaces), then hand off
  55  * the drawing to the 'draw' module.
  56  */
  57 static void
  58 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
  59                                        struct pipe_buffer *indexBuffer,
  60                                        unsigned indexSize,
  61                                        unsigned minIndex,
  62                                        unsigned maxIndex,
  63                                        unsigned mode,
  64                                        unsigned start,
  65                                        unsigned count,
  66                                        unsigned startInstance,
  67                                        unsigned instanceCount);
  68
  69
  70 void
  71 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  72                      unsigned start, unsigned count)
  73 {
  74    softpipe_draw_range_elements_instanced(pipe,
  75                                           NULL,
  76                                           0,
  77                                           0,
  78                                           0xffffffff,
  79                                           mode,
  80                                           start,
  81                                           count,
  82                                           0,
  83                                           1);
  84 }
  85
  86
  87 void
  88 softpipe_draw_range_elements(struct pipe_context *pipe,
  89                              struct pipe_buffer *indexBuffer,
  90                              unsigned indexSize,
  91                              unsigned min_index,
  92                              unsigned max_index,
  93                              unsigned mode, unsigned start, unsigned count)
  94 {
  95    softpipe_draw_range_elements_instanced(pipe,
  96                                           indexBuffer,
  97                                           indexSize,
  98                                           min_index,
  99                                           max_index,
 100                                           mode,
 101                                           start,
 102                                           count,
 103                                           0,
 104                                           1);
 105 }
 106
 107
 108 void
 109 softpipe_draw_elements(struct pipe_context *pipe,
 110                        struct pipe_buffer *indexBuffer,
 111                        unsigned indexSize,
 112                        unsigned mode, unsigned start, unsigned count)
 113 {
 114    softpipe_draw_range_elements_instanced(pipe,
 115                                           indexBuffer,
 116                                           indexSize,
 117                                           0,
 118                                           0xffffffff,
 119                                           mode,
 120                                           start,
 121                                           count,
 122                                           0,
 123                                           1);
 124 }
 125
 126 void
 127 softpipe_draw_arrays_instanced(struct pipe_context *pipe,
 128                                unsigned mode,
 129                                unsigned start,
 130                                unsigned count,
 131                                unsigned startInstance,
 132                                unsigned instanceCount)
 133 {
 134    softpipe_draw_range_elements_instanced(pipe,
 135                                           NULL,
 136                                           0,
 137                                           0,
 138                                           0xffffffff,
 139                                           mode,
 140                                           start,
 141                                           count,
 142                                           startInstance,
 143                                           instanceCount);
 144 }
 145
 146 void
 147 softpipe_draw_elements_instanced(struct pipe_context *pipe,
 148                                  struct pipe_buffer *indexBuffer,
 149                                  unsigned indexSize,
 150                                  unsigned mode,
 151                                  unsigned start,
 152                                  unsigned count,
 153                                  unsigned startInstance,
 154                                  unsigned instanceCount)
 155 {
 156    softpipe_draw_range_elements_instanced(pipe,
 157                                           indexBuffer,
 158                                           indexSize,
 159                                           0,
 160                                           0xffffffff,
 161                                           mode,
 162                                           start,
 163                                           count,
 164                                           startInstance,
 165                                           instanceCount);
 166 }
 167
 168 static void
 169 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 170                                        struct pipe_buffer *indexBuffer,
 171                                        unsigned indexSize,
 172                                        unsigned minIndex,
 173                                        unsigned maxIndex,
 174                                        unsigned mode,
 175                                        unsigned start,
 176                                        unsigned count,
 177                                        unsigned startInstance,
 178                                        unsigned instanceCount)
 179 {
 180    struct softpipe_context *sp = softpipe_context(pipe);
 181    struct draw_context *draw = sp->draw;
 182    unsigned i;
 183
 184    if (!softpipe_check_render_cond(sp))
 185       return;
 186
 187    sp->reduced_api_prim = u_reduced_prim(mode);
 188
 189    if (sp->dirty) {
 190       softpipe_update_derived(sp);
 191    }
 192
 193    softpipe_map_transfers(sp);
 194
 195    /* Map vertex buffers */
 196    for (i = 0; i < sp->num_vertex_buffers; i++) {
 197       void *buf = softpipe_buffer(sp->vertex_buffer[i].buffer)->data;
 198       draw_set_mapped_vertex_buffer(draw, i, buf);
 199    }
 200
 201    /* Map index buffer, if present */
 202    if (indexBuffer) {
 203       void *mapped_indexes = softpipe_buffer(indexBuffer)->data;
 204       draw_set_mapped_element_buffer_range(draw,
 205                                            indexSize,
 206                                            minIndex,
 207                                            maxIndex,
 208                                            mapped_indexes);
 209    } else {
 210       /* no index/element buffer */
 211       draw_set_mapped_element_buffer_range(draw,
 212                                            0,
 213                                            start,
 214                                            start + count - 1,
 215                                            NULL);
 216    }
 217
 218    /* draw! */
 219    draw_arrays_instanced(draw, mode, start, count, startInstance, instanceCount);
 220
 221    /* unmap vertex/index buffers - will cause draw module to flush */
 222    for (i = 0; i < sp->num_vertex_buffers; i++) {
 223       draw_set_mapped_vertex_buffer(draw, i, NULL);
 224    }
 225    if (indexBuffer) {
 226       draw_set_mapped_element_buffer(draw, 0, NULL);
 227    }
 228
 229    /*
 230     * TODO: Flush only when a user vertex/index buffer is present
 231     * (or even better, modify draw module to do this
 232     * internally when this condition is seen?)
 233     */
 234    draw_flush(draw);
 235
 236    /* Note: leave drawing surfaces mapped */
 237    sp->dirty_render_cache = TRUE;
 238 }