src/mesa/pipe/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 #include "pipe/p_util.h"
  38
  39 #include "sp_context.h"
  40 #include "sp_state.h"
  41
  42 #include "pipe/draw/draw_context.h"
  43
  44
  45
  46 static void
  47 softpipe_map_constant_buffers(struct softpipe_context *sp)
  48 {
  49    struct pipe_winsys *ws = sp->pipe.winsys;
  50    uint i;
  51    for (i = 0; i < 2; i++) {
  52       if (sp->constants[i].size)
  53          sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
  54                                                   PIPE_BUFFER_FLAG_READ);
  55    }
  56
  57    draw_set_mapped_constant_buffer(sp->draw,
  58                                    sp->mapped_constants[PIPE_SHADER_VERTEX]);
  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    for (i = 0; i < 2; i++) {
  67       if (sp->constants[i].size)
  68          ws->buffer_unmap(ws, sp->constants[i].buffer);
  69       sp->mapped_constants[i] = NULL;
  70    }
  71 }
  72
  73
  74 boolean
  75 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  76                      unsigned start, unsigned count)
  77 {
  78    return softpipe_draw_elements(pipe, NULL, 0, mode, start, count);
  79 }
  80
  81
  82
  83 /**
  84  * Draw vertex arrays, with optional indexing.
  85  * Basically, map the vertex buffers (and drawing surfaces), then hand off
  86  * the drawing to the 'draw' module.
  87  *
  88  * XXX should the element buffer be specified/bound with a separate function?
  89  */
  90 boolean
  91 softpipe_draw_elements(struct pipe_context *pipe,
  92                        struct pipe_buffer_handle *indexBuffer,
  93                        unsigned indexSize,
  94                        unsigned mode, unsigned start, unsigned count)
  95 {
  96    struct softpipe_context *sp = softpipe_context(pipe);
  97    struct draw_context *draw = sp->draw;
  98    unsigned length, first, incr, i;
  99
 100    /* first, check that the primitive is not malformed */
 101    draw_prim_info( mode, &first, &incr );
 102    length = draw_trim( count, first, incr );
 103    if (!length)
 104       return TRUE;
 105
 106
 107    if (sp->dirty)
 108       softpipe_update_derived( sp );
 109
 110    softpipe_map_surfaces(sp);
 111
 112    softpipe_map_constant_buffers(sp);
 113
 114    /*
 115     * Map vertex buffers
 116     */
 117    for (i = 0; i < PIPE_ATTRIB_MAX; i++) {
 118       if (sp->vertex_buffer[i].buffer) {
 119          void *buf
 120             = pipe->winsys->buffer_map(pipe->winsys,
 121                                        sp->vertex_buffer[i].buffer,
 122                                        PIPE_BUFFER_FLAG_READ);
 123          draw_set_mapped_vertex_buffer(draw, i, buf);
 124       }
 125    }
 126    /* Map index buffer, if present */
 127    if (indexBuffer) {
 128       void *mapped_indexes
 129          = pipe->winsys->buffer_map(pipe->winsys, indexBuffer,
 130                                     PIPE_BUFFER_FLAG_READ);
 131       draw_set_mapped_element_buffer(draw, indexSize, mapped_indexes);
 132    }
 133    else {
 134       /* no index/element buffer */
 135       draw_set_mapped_element_buffer(draw, 0, NULL);
 136    }
 137
 138    /* draw! */
 139    draw_arrays(draw, mode, start, count);
 140
 141    /*
 142     * unmap vertex/index buffers
 143     */
 144    for (i = 0; i < PIPE_ATTRIB_MAX; i++) {
 145       if (sp->vertex_buffer[i].buffer) {
 146          pipe->winsys->buffer_unmap(pipe->winsys, sp->vertex_buffer[i].buffer);
 147          draw_set_mapped_vertex_buffer(draw, i, NULL);
 148       }
 149    }
 150    if (indexBuffer) {
 151       pipe->winsys->buffer_unmap(pipe->winsys, indexBuffer);
 152       draw_set_mapped_element_buffer(draw, 0, NULL);
 153    }
 154
 155    softpipe_unmap_surfaces(sp);
 156    softpipe_unmap_constant_buffers(sp);
 157
 158    return TRUE;
 159 }