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