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