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, vssize, gssize;
  52
  53    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
  54       if (sp->constants[i].buffer && sp->constants[i].buffer->size)
  55          sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
  56                                                   PIPE_BUFFER_USAGE_CPU_READ);
  57    }
  58
  59    if (sp->constants[PIPE_SHADER_VERTEX].buffer)
  60       vssize = sp->constants[PIPE_SHADER_VERTEX].buffer->size;
  61    else
  62       vssize = 0;
  63
  64    if (sp->constants[PIPE_SHADER_GEOMETRY].buffer)
  65       gssize = sp->constants[PIPE_SHADER_GEOMETRY].buffer->size;
  66    else
  67       gssize = 0;
  68
  69    draw_set_mapped_constant_buffer(sp->draw, PIPE_SHADER_VERTEX,
  70                                    sp->mapped_constants[PIPE_SHADER_VERTEX],
  71                                    vssize);
  72    draw_set_mapped_constant_buffer(sp->draw, PIPE_SHADER_GEOMETRY,
  73                                    sp->mapped_constants[PIPE_SHADER_GEOMETRY],
  74                                    gssize);
  75 }
  76
  77
  78 static void
  79 softpipe_unmap_constant_buffers(struct softpipe_context *sp)
  80 {
  81    struct pipe_winsys *ws = sp->pipe.winsys;
  82    uint i;
  83
  84    /* really need to flush all prims since the vert/frag shaders const buffers
  85     * are going away now.
  86     */
  87    draw_flush(sp->draw);
  88
  89    draw_set_mapped_constant_buffer(sp->draw, PIPE_SHADER_VERTEX, NULL, 0);
  90    draw_set_mapped_constant_buffer(sp->draw, PIPE_SHADER_GEOMETRY, NULL, 0);
  91
  92    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
  93       if (sp->constants[i].buffer && sp->constants[i].buffer->size)
  94          ws->buffer_unmap(ws, sp->constants[i].buffer);
  95       sp->mapped_constants[i] = NULL;
  96    }
  97 }
  98
  99
 100 boolean
 101 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
 102                      unsigned start, unsigned count)
 103 {
 104    return softpipe_draw_elements(pipe, NULL, 0, mode, start, count);
 105 }
 106
 107
 108 /**
 109  * Draw vertex arrays, with optional indexing.
 110  * Basically, map the vertex buffers (and drawing surfaces), then hand off
 111  * the drawing to the 'draw' module.
 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 = u_reduced_prim(mode);
 126
 127    if (sp->dirty)
 128       softpipe_update_derived( sp );
 129
 130    softpipe_map_transfers(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_buffer_map(pipe->screen,
 139                                     sp->vertex_buffer[i].buffer,
 140                                     PIPE_BUFFER_USAGE_CPU_READ);
 141       draw_set_mapped_vertex_buffer(draw, i, buf);
 142    }
 143
 144    /* Map index buffer, if present */
 145    if (indexBuffer) {
 146       void *mapped_indexes
 147          = pipe_buffer_map(pipe->screen, indexBuffer,
 148                                     PIPE_BUFFER_USAGE_CPU_READ);
 149       draw_set_mapped_element_buffer_range(draw, indexSize,
 150                                            min_index,
 151                                            max_index,
 152                                            mapped_indexes);
 153    }
 154    else {
 155       /* no index/element buffer */
 156       draw_set_mapped_element_buffer_range(draw, 0, start,
 157                                            start + count - 1, NULL);
 158    }
 159
 160    /* draw! */
 161    draw_arrays(draw, mode, start, count);
 162
 163    /*
 164     * unmap vertex/index buffers - will cause draw module to flush
 165     */
 166    for (i = 0; i < sp->num_vertex_buffers; i++) {
 167       draw_set_mapped_vertex_buffer(draw, i, NULL);
 168       pipe_buffer_unmap(pipe->screen, sp->vertex_buffer[i].buffer);
 169    }
 170    if (indexBuffer) {
 171       draw_set_mapped_element_buffer(draw, 0, NULL);
 172       pipe_buffer_unmap(pipe->screen, indexBuffer);
 173    }
 174
 175
 176    /* Note: leave drawing surfaces mapped */
 177    softpipe_unmap_constant_buffers(sp);
 178
 179    sp->dirty_render_cache = TRUE;
 180
 181    return TRUE;
 182 }
 183
 184
 185 boolean
 186 softpipe_draw_elements(struct pipe_context *pipe,
 187                        struct pipe_buffer *indexBuffer,
 188                        unsigned indexSize,
 189                        unsigned mode, unsigned start, unsigned count)
 190 {
 191    return softpipe_draw_range_elements( pipe, indexBuffer,
 192                                         indexSize,
 193                                         0, 0xffffffff,
 194                                         mode, start, count );
 195 }