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 #include "pipe/p_inlines.h"
  38
  39 #include "sp_context.h"
  40 #include "sp_state.h"
  41
  42 #include "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 < PIPE_SHADER_TYPES; i++) {
  52       if (sp->constants[i].size)
  53          sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
  54                                                   PIPE_BUFFER_USAGE_CPU_READ);
  55    }
  56
  57    draw_set_mapped_constant_buffer(sp->draw,
  58                                    sp->mapped_constants[PIPE_SHADER_VERTEX],
  59                                    sp->constants[PIPE_SHADER_VERTEX].size);
  60 }
  61
  62 static void
  63 softpipe_unmap_constant_buffers(struct softpipe_context *sp)
  64 {
  65    struct pipe_winsys *ws = sp->pipe.winsys;
  66    uint i;
  67
  68    /* really need to flush all prims since the vert/frag shaders const buffers
  69     * are going away now.
  70     */
  71    draw_flush(sp->draw);
  72
  73    draw_set_mapped_constant_buffer(sp->draw, NULL, 0);
  74
  75    for (i = 0; i < 2; i++) {
  76       if (sp->constants[i].size)
  77          ws->buffer_unmap(ws, sp->constants[i].buffer);
  78       sp->mapped_constants[i] = NULL;
  79    }
  80 }
  81
  82
  83 static unsigned reduced_prim[PIPE_PRIM_POLYGON + 1] = {
  84    PIPE_PRIM_POINTS,
  85    PIPE_PRIM_LINES,
  86    PIPE_PRIM_LINES,
  87    PIPE_PRIM_LINES,
  88    PIPE_PRIM_TRIANGLES,
  89    PIPE_PRIM_TRIANGLES,
  90    PIPE_PRIM_TRIANGLES,
  91    PIPE_PRIM_TRIANGLES,
  92    PIPE_PRIM_TRIANGLES,
  93    PIPE_PRIM_TRIANGLES
  94 };
  95
  96
  97 boolean
  98 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  99                      unsigned start, unsigned count)
 100 {
 101    return softpipe_draw_elements(pipe, NULL, 0, mode, start, count);
 102 }
 103
 104
 105
 106 /**
 107  * Draw vertex arrays, with optional indexing.
 108  * Basically, map the vertex buffers (and drawing surfaces), then hand off
 109  * the drawing to the 'draw' module.
 110  *
 111  * XXX should the element buffer be specified/bound with a separate function?
 112  */
 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    sp->reduced_api_prim = reduced_prim[mode];
 127
 128    if (sp->dirty)
 129       softpipe_update_derived( sp );
 130
 131    softpipe_map_surfaces(sp);
 132    softpipe_map_constant_buffers(sp);
 133
 134    /*
 135     * Map vertex buffers
 136     */
 137    for (i = 0; i < sp->num_vertex_buffers; i++) {
 138       void *buf
 139          = pipe_buffer_map(pipe->screen,
 140                                     sp->vertex_buffer[i].buffer,
 141                                     PIPE_BUFFER_USAGE_CPU_READ);
 142       draw_set_mapped_vertex_buffer(draw, i, buf);
 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, start + count - 1, NULL);
 157    }
 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    return TRUE;
 180 }
 181
 182 boolean
 183 softpipe_draw_elements(struct pipe_context *pipe,
 184                        struct pipe_buffer *indexBuffer,
 185                        unsigned indexSize,
 186                        unsigned mode, unsigned start, unsigned count)
 187 {
 188    return softpipe_draw_range_elements( pipe, indexBuffer,
 189                                         indexSize,
 190                                         0, 0xffffffff,
 191                                         mode, start, count );
 192 }
 193
 194
 195
 196 void
 197 softpipe_set_edgeflags(struct pipe_context *pipe, const unsigned *edgeflags)
 198 {
 199    struct softpipe_context *sp = softpipe_context(pipe);
 200    draw_set_edgeflags(sp->draw, edgeflags);
 201 }
 202