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/p_winsys.h"
  37
  38 #include "sp_context.h"
  39 #include "sp_state.h"
  40
  41 #include "draw/draw_context.h"
  42
  43
  44
  45 static void
  46 softpipe_map_constant_buffers(struct softpipe_context *sp)
  47 {
  48    struct pipe_winsys *ws = sp->pipe.winsys;
  49    uint i;
  50    for (i = 0; i < 2; i++) {
  51       if (sp->constants[i].size)
  52          sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
  53                                                   PIPE_BUFFER_USAGE_CPU_READ);
  54    }
  55
  56    draw_set_mapped_constant_buffer(sp->draw,
  57                                    sp->mapped_constants[PIPE_SHADER_VERTEX],
  58                                    sp->constants[i].size);
  59 }
  60
  61 static void
  62 softpipe_unmap_constant_buffers(struct softpipe_context *sp)
  63 {
  64    struct pipe_winsys *ws = sp->pipe.winsys;
  65    uint i;
  66
  67    /* really need to flush all prims since the vert/frag shaders const buffers
  68     * are going away now.
  69     */
  70    draw_flush(sp->draw);
  71
  72    draw_set_mapped_constant_buffer(sp->draw, NULL, 0);
  73
  74    for (i = 0; i < 2; i++) {
  75       if (sp->constants[i].size)
  76          ws->buffer_unmap(ws, sp->constants[i].buffer);
  77       sp->mapped_constants[i] = NULL;
  78    }
  79 }
  80
  81
  82 static unsigned reduced_prim[PIPE_PRIM_POLYGON + 1] = {
  83    PIPE_PRIM_POINTS,
  84    PIPE_PRIM_LINES,
  85    PIPE_PRIM_LINES,
  86    PIPE_PRIM_LINES,
  87    PIPE_PRIM_TRIANGLES,
  88    PIPE_PRIM_TRIANGLES,
  89    PIPE_PRIM_TRIANGLES,
  90    PIPE_PRIM_TRIANGLES,
  91    PIPE_PRIM_TRIANGLES,
  92    PIPE_PRIM_TRIANGLES
  93 };
  94
  95
  96 boolean
  97 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  98                      unsigned start, unsigned count)
  99 {
 100    return softpipe_draw_elements(pipe, NULL, 0, mode, start, count);
 101 }
 102
 103
 104
 105 /**
 106  * Draw vertex arrays, with optional indexing.
 107  * Basically, map the vertex buffers (and drawing surfaces), then hand off
 108  * the drawing to the 'draw' module.
 109  *
 110  * XXX should the element buffer be specified/bound with a separate function?
 111  */
 112
 113 boolean
 114 softpipe_draw_range_elements(struct pipe_context *pipe,
 115                              struct pipe_buffer *indexBuffer,
 116                              unsigned indexSize,
 117                              unsigned min_index,
 118                              unsigned max_index,
 119                              unsigned mode, unsigned start, unsigned count)
 120 {
 121    struct softpipe_context *sp = softpipe_context(pipe);
 122    struct draw_context *draw = sp->draw;
 123    unsigned i;
 124
 125    sp->reduced_api_prim = reduced_prim[mode];
 126
 127    if (sp->dirty)
 128       softpipe_update_derived( sp );
 129
 130    softpipe_map_surfaces(sp);
 131    softpipe_map_constant_buffers(sp);
 132
 133    /*
 134     * Map vertex buffers
 135     */
 136    for (i = 0; i < sp->num_vertex_buffers; i++) {
 137       void *buf
 138          = pipe->winsys->buffer_map(pipe->winsys,
 139                                     sp->vertex_buffer[i].buffer,
 140                                     PIPE_BUFFER_USAGE_CPU_READ);
 141       draw_set_mapped_vertex_buffer(draw, i, buf);
 142    }
 143    /* Map index buffer, if present */
 144    if (indexBuffer) {
 145       void *mapped_indexes
 146          = pipe->winsys->buffer_map(pipe->winsys, indexBuffer,
 147                                     PIPE_BUFFER_USAGE_CPU_READ);
 148       draw_set_mapped_element_buffer_range(draw, indexSize,
 149                                            min_index,
 150                                            max_index,
 151                                            mapped_indexes);
 152    }
 153    else {
 154       /* no index/element buffer */
 155       draw_set_mapped_element_buffer_range(draw, 0, start, start + count - 1, NULL);
 156    }
 157
 158
 159    /* draw! */
 160    draw_arrays(draw, mode, start, count);
 161
 162    /*
 163     * unmap vertex/index buffers - will cause draw module to flush
 164     */
 165    for (i = 0; i < sp->num_vertex_buffers; i++) {
 166       draw_set_mapped_vertex_buffer(draw, i, NULL);
 167       pipe->winsys->buffer_unmap(pipe->winsys, sp->vertex_buffer[i].buffer);
 168    }
 169    if (indexBuffer) {
 170       draw_set_mapped_element_buffer(draw, 0, NULL);
 171       pipe->winsys->buffer_unmap(pipe->winsys, indexBuffer);
 172    }
 173
 174
 175    /* Note: leave drawing surfaces mapped */
 176    softpipe_unmap_constant_buffers(sp);
 177
 178    return TRUE;
 179 }
 180
 181 boolean
 182 softpipe_draw_elements(struct pipe_context *pipe,
 183                        struct pipe_buffer *indexBuffer,
 184                        unsigned indexSize,
 185                        unsigned mode, unsigned start, unsigned count)
 186 {
 187    return softpipe_draw_range_elements( pipe, indexBuffer,
 188                                         indexSize,
 189                                         0, 0xffffffff,
 190                                         mode, start, count );
 191 }
 192
 193
 194
 195 void
 196 softpipe_set_edgeflags(struct pipe_context *pipe, const unsigned *edgeflags)
 197 {
 198    struct softpipe_context *sp = softpipe_context(pipe);
 199    draw_set_edgeflags(sp->draw, edgeflags);
 200 }
 201