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
  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, size;
  51
  52    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
  53       if (sp->constants[i].buffer && sp->constants[i].buffer->size)
  54          sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
  55                                                   PIPE_BUFFER_USAGE_CPU_READ);
  56    }
  57
  58    if (sp->constants[PIPE_SHADER_VERTEX].buffer)
  59       size = sp->constants[PIPE_SHADER_VERTEX].buffer->size;
  60    else
  61       size = 0;
  62
  63    draw_set_mapped_constant_buffer(sp->draw,
  64                                    sp->mapped_constants[PIPE_SHADER_VERTEX],
  65                                    size);
  66 }
  67
  68 static void
  69 softpipe_unmap_constant_buffers(struct softpipe_context *sp)
  70 {
  71    struct pipe_winsys *ws = sp->pipe.winsys;
  72    uint i;
  73
  74    /* really need to flush all prims since the vert/frag shaders const buffers
  75     * are going away now.
  76     */
  77    draw_flush(sp->draw);
  78
  79    draw_set_mapped_constant_buffer(sp->draw, NULL, 0);
  80
  81    for (i = 0; i < 2; i++) {
  82       if (sp->constants[i].buffer && sp->constants[i].buffer->size)
  83          ws->buffer_unmap(ws, sp->constants[i].buffer);
  84       sp->mapped_constants[i] = NULL;
  85    }
  86 }
  87
  88
  89 static unsigned reduced_prim[PIPE_PRIM_POLYGON + 1] = {
  90    PIPE_PRIM_POINTS,
  91    PIPE_PRIM_LINES,
  92    PIPE_PRIM_LINES,
  93    PIPE_PRIM_LINES,
  94    PIPE_PRIM_TRIANGLES,
  95    PIPE_PRIM_TRIANGLES,
  96    PIPE_PRIM_TRIANGLES,
  97    PIPE_PRIM_TRIANGLES,
  98    PIPE_PRIM_TRIANGLES,
  99    PIPE_PRIM_TRIANGLES
 100 };
 101
 102
 103 boolean
 104 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
 105                      unsigned start, unsigned count)
 106 {
 107    return softpipe_draw_elements(pipe, NULL, 0, mode, start, count);
 108 }
 109
 110
 111
 112 /**
 113  * Draw vertex arrays, with optional indexing.
 114  * Basically, map the vertex buffers (and drawing surfaces), then hand off
 115  * the drawing to the 'draw' module.
 116  *
 117  * XXX should the element buffer be specified/bound with a separate function?
 118  */
 119
 120 boolean
 121 softpipe_draw_range_elements(struct pipe_context *pipe,
 122                              struct pipe_buffer *indexBuffer,
 123                              unsigned indexSize,
 124                              unsigned min_index,
 125                              unsigned max_index,
 126                              unsigned mode, unsigned start, unsigned count)
 127 {
 128    struct softpipe_context *sp = softpipe_context(pipe);
 129    struct draw_context *draw = sp->draw;
 130    unsigned i;
 131
 132    sp->api_prim = mode;
 133    sp->reduced_api_prim = reduced_prim[mode];
 134
 135    if (sp->dirty)
 136       softpipe_update_derived( sp );
 137
 138    softpipe_map_transfers(sp);
 139    softpipe_map_constant_buffers(sp);
 140
 141    /*
 142     * Map vertex buffers
 143     */
 144    for (i = 0; i < sp->num_vertex_buffers; i++) {
 145       void *buf
 146          = pipe_buffer_map(pipe->screen,
 147                                     sp->vertex_buffer[i].buffer,
 148                                     PIPE_BUFFER_USAGE_CPU_READ);
 149       draw_set_mapped_vertex_buffer(draw, i, buf);
 150    }
 151    /* Map index buffer, if present */
 152    if (indexBuffer) {
 153       void *mapped_indexes
 154          = pipe_buffer_map(pipe->screen, indexBuffer,
 155                                     PIPE_BUFFER_USAGE_CPU_READ);
 156       draw_set_mapped_element_buffer_range(draw, indexSize,
 157                                            min_index,
 158                                            max_index,
 159                                            mapped_indexes);
 160    }
 161    else {
 162       /* no index/element buffer */
 163       draw_set_mapped_element_buffer_range(draw, 0, start, start + count - 1, NULL);
 164    }
 165
 166
 167    /* draw! */
 168    draw_arrays(draw, mode, start, count);
 169
 170    /*
 171     * unmap vertex/index buffers - will cause draw module to flush
 172     */
 173    for (i = 0; i < sp->num_vertex_buffers; i++) {
 174       draw_set_mapped_vertex_buffer(draw, i, NULL);
 175       pipe_buffer_unmap(pipe->screen, sp->vertex_buffer[i].buffer);
 176    }
 177    if (indexBuffer) {
 178       draw_set_mapped_element_buffer(draw, 0, NULL);
 179       pipe_buffer_unmap(pipe->screen, indexBuffer);
 180    }
 181
 182
 183    /* Note: leave drawing surfaces mapped */
 184    softpipe_unmap_constant_buffers(sp);
 185
 186    return TRUE;
 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 }
 200
 201
 202
 203 void
 204 softpipe_set_edgeflags(struct pipe_context *pipe, const unsigned *edgeflags)
 205 {
 206    struct softpipe_context *sp = softpipe_context(pipe);
 207    draw_set_edgeflags(sp->draw, edgeflags);
 208 }
 209