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