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 "pipe/internal/p_winsys_screen.h"
  37 #include "pipe/p_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
  44 #include "draw/draw_context.h"
  45
  46
  47
  48 static void
  49 softpipe_map_constant_buffers(struct softpipe_context *sp)
  50 {
  51    struct pipe_winsys *ws = sp->pipe.winsys;
  52    uint i, vssize, gssize;
  53
  54    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
  55       if (sp->constants[i].buffer && sp->constants[i].buffer->size)
  56          sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
  57                                                   PIPE_BUFFER_USAGE_CPU_READ);
  58    }
  59
  60    if (sp->constants[PIPE_SHADER_VERTEX].buffer)
  61       vssize = sp->constants[PIPE_SHADER_VERTEX].buffer->size;
  62    else
  63       vssize = 0;
  64
  65    if (sp->constants[PIPE_SHADER_GEOMETRY].buffer)
  66       gssize = sp->constants[PIPE_SHADER_GEOMETRY].buffer->size;
  67    else
  68       gssize = 0;
  69
  70    draw_set_mapped_constant_buffer(sp->draw, PIPE_SHADER_VERTEX,
  71                                    sp->mapped_constants[PIPE_SHADER_VERTEX],
  72                                    vssize);
  73    draw_set_mapped_constant_buffer(sp->draw, PIPE_SHADER_GEOMETRY,
  74                                    sp->mapped_constants[PIPE_SHADER_GEOMETRY],
  75                                    gssize);
  76 }
  77
  78
  79 static void
  80 softpipe_unmap_constant_buffers(struct softpipe_context *sp)
  81 {
  82    struct pipe_winsys *ws = sp->pipe.winsys;
  83    uint i;
  84
  85    /* really need to flush all prims since the vert/frag shaders const buffers
  86     * are going away now.
  87     */
  88    draw_flush(sp->draw);
  89
  90    draw_set_mapped_constant_buffer(sp->draw, PIPE_SHADER_VERTEX, NULL, 0);
  91    draw_set_mapped_constant_buffer(sp->draw, PIPE_SHADER_GEOMETRY, NULL, 0);
  92
  93    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
  94       if (sp->constants[i].buffer && sp->constants[i].buffer->size)
  95          ws->buffer_unmap(ws, sp->constants[i].buffer);
  96       sp->mapped_constants[i] = NULL;
  97    }
  98 }
  99
 100
 101 /**
 102  * Draw vertex arrays, with optional indexing.
 103  * Basically, map the vertex buffers (and drawing surfaces), then hand off
 104  * the drawing to the 'draw' module.
 105  */
 106 static boolean
 107 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 108                                        struct pipe_buffer *indexBuffer,
 109                                        unsigned indexSize,
 110                                        unsigned minIndex,
 111                                        unsigned maxIndex,
 112                                        unsigned mode,
 113                                        unsigned start,
 114                                        unsigned count,
 115                                        unsigned startInstance,
 116                                        unsigned instanceCount);
 117
 118
 119 boolean
 120 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
 121                      unsigned start, unsigned count)
 122 {
 123    return softpipe_draw_range_elements_instanced(pipe,
 124                                                  NULL,
 125                                                  0,
 126                                                  0,
 127                                                  0xffffffff,
 128                                                  mode,
 129                                                  start,
 130                                                  count,
 131                                                  0,
 132                                                  1);
 133 }
 134
 135
 136 boolean
 137 softpipe_draw_range_elements(struct pipe_context *pipe,
 138                              struct pipe_buffer *indexBuffer,
 139                              unsigned indexSize,
 140                              unsigned min_index,
 141                              unsigned max_index,
 142                              unsigned mode, unsigned start, unsigned count)
 143 {
 144    return softpipe_draw_range_elements_instanced(pipe,
 145                                                  indexBuffer,
 146                                                  indexSize,
 147                                                  min_index,
 148                                                  max_index,
 149                                                  mode,
 150                                                  start,
 151                                                  count,
 152                                                  0,
 153                                                  1);
 154 }
 155
 156
 157 boolean
 158 softpipe_draw_elements(struct pipe_context *pipe,
 159                        struct pipe_buffer *indexBuffer,
 160                        unsigned indexSize,
 161                        unsigned mode, unsigned start, unsigned count)
 162 {
 163    return softpipe_draw_range_elements_instanced(pipe,
 164                                                  indexBuffer,
 165                                                  indexSize,
 166                                                  0,
 167                                                  0xffffffff,
 168                                                  mode,
 169                                                  start,
 170                                                  count,
 171                                                  0,
 172                                                  1);
 173 }
 174
 175 boolean
 176 softpipe_draw_arrays_instanced(struct pipe_context *pipe,
 177                                unsigned mode,
 178                                unsigned start,
 179                                unsigned count,
 180                                unsigned startInstance,
 181                                unsigned instanceCount)
 182 {
 183    return softpipe_draw_range_elements_instanced(pipe,
 184                                                  NULL,
 185                                                  0,
 186                                                  0,
 187                                                  0xffffffff,
 188                                                  mode,
 189                                                  start,
 190                                                  count,
 191                                                  startInstance,
 192                                                  instanceCount);
 193 }
 194
 195 boolean
 196 softpipe_draw_elements_instanced(struct pipe_context *pipe,
 197                                  struct pipe_buffer *indexBuffer,
 198                                  unsigned indexSize,
 199                                  unsigned mode,
 200                                  unsigned start,
 201                                  unsigned count,
 202                                  unsigned startInstance,
 203                                  unsigned instanceCount)
 204 {
 205    return softpipe_draw_range_elements_instanced(pipe,
 206                                                  indexBuffer,
 207                                                  indexSize,
 208                                                  0,
 209                                                  0xffffffff,
 210                                                  mode,
 211                                                  start,
 212                                                  count,
 213                                                  startInstance,
 214                                                  instanceCount);
 215 }
 216
 217 static boolean
 218 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 219                                        struct pipe_buffer *indexBuffer,
 220                                        unsigned indexSize,
 221                                        unsigned minIndex,
 222                                        unsigned maxIndex,
 223                                        unsigned mode,
 224                                        unsigned start,
 225                                        unsigned count,
 226                                        unsigned startInstance,
 227                                        unsigned instanceCount)
 228 {
 229    struct softpipe_context *sp = softpipe_context(pipe);
 230    struct draw_context *draw = sp->draw;
 231    unsigned i;
 232
 233    if (!softpipe_check_render_cond(sp))
 234       return TRUE;
 235
 236    sp->reduced_api_prim = u_reduced_prim(mode);
 237
 238    if (sp->dirty) {
 239       softpipe_update_derived(sp);
 240    }
 241
 242    softpipe_map_transfers(sp);
 243    softpipe_map_constant_buffers(sp);
 244
 245    /* Map vertex buffers */
 246    for (i = 0; i < sp->num_vertex_buffers; i++) {
 247       void *buf;
 248
 249       buf = pipe_buffer_map(pipe->screen,
 250                             sp->vertex_buffer[i].buffer,
 251                             PIPE_BUFFER_USAGE_CPU_READ);
 252       draw_set_mapped_vertex_buffer(draw, i, buf);
 253    }
 254
 255    /* Map index buffer, if present */
 256    if (indexBuffer) {
 257       void *mapped_indexes;
 258
 259       mapped_indexes = pipe_buffer_map(pipe->screen,
 260                                        indexBuffer,
 261                                        PIPE_BUFFER_USAGE_CPU_READ);
 262       draw_set_mapped_element_buffer_range(draw,
 263                                            indexSize,
 264                                            minIndex,
 265                                            maxIndex,
 266                                            mapped_indexes);
 267    } else {
 268       /* no index/element buffer */
 269       draw_set_mapped_element_buffer_range(draw,
 270                                            0,
 271                                            start,
 272                                            start + count - 1,
 273                                            NULL);
 274    }
 275
 276    /* draw! */
 277    draw_arrays_instanced(draw, mode, start, count, startInstance, instanceCount);
 278
 279    /* unmap vertex/index buffers - will cause draw module to flush */
 280    for (i = 0; i < sp->num_vertex_buffers; i++) {
 281       draw_set_mapped_vertex_buffer(draw, i, NULL);
 282       pipe_buffer_unmap(pipe->screen, sp->vertex_buffer[i].buffer);
 283    }
 284    if (indexBuffer) {
 285       draw_set_mapped_element_buffer(draw, 0, NULL);
 286       pipe_buffer_unmap(pipe->screen, indexBuffer);
 287    }
 288
 289    /* Note: leave drawing surfaces mapped */
 290    softpipe_unmap_constant_buffers(sp);
 291
 292    sp->dirty_render_cache = TRUE;
 293
 294    return TRUE;
 295 }