src/gallium/drivers/nv10/nv10_prim_vbuf.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 /**
  29  * \file
  30  * Build post-transformation, post-clipping vertex buffers and element
  31  * lists by hooking into the end of the primitive pipeline and
  32  * manipulating the vertex_id field in the vertex headers.
  33  *
  34  * XXX: work in progress
  35  *
  36  * \author José Fonseca <jrfonseca@tungstengraphics.com>
  37  * \author Keith Whitwell <keith@tungstengraphics.com>
  38  */
  39
  40
  41 #include "draw/draw_vbuf.h"
  42 #include "pipe/p_debug.h"
  43 #include "pipe/p_util.h"
  44 #include "pipe/p_inlines.h"
  45 #include "pipe/p_winsys.h"
  46
  47 #include "nv10_context.h"
  48 #include "nv10_state.h"
  49
  50
  51 /**
  52  * Primitive renderer for nv10.
  53  */
  54 struct nv10_vbuf_render {
  55         struct vbuf_render base;
  56
  57         struct nv10_context *nv10;
  58
  59         /** Vertex buffer */
  60         struct pipe_buffer* buffer;
  61
  62         /** Vertex size in bytes */
  63         unsigned vertex_size;
  64
  65         /** Hardware primitive */
  66         unsigned hwprim;
  67 };
  68
  69
  70 /**
  71  * Basically a cast wrapper.
  72  */
  73 static INLINE struct nv10_vbuf_render *
  74 nv10_vbuf_render( struct vbuf_render *render )
  75 {
  76         assert(render);
  77         return (struct nv10_vbuf_render *)render;
  78 }
  79
  80
  81 static const struct vertex_info *
  82 nv10_vbuf_render_get_vertex_info( struct vbuf_render *render )
  83 {
  84         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
  85         struct nv10_context *nv10 = nv10_render->nv10;
  86         return &nv10->vertex_info;
  87 }
  88
  89
  90 static void *
  91 nv10_vbuf_render_allocate_vertices( struct vbuf_render *render,
  92                 ushort vertex_size,
  93                 ushort nr_vertices )
  94 {
  95         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
  96         struct nv10_context *nv10 = nv10_render->nv10;
  97         struct pipe_winsys *winsys = nv10->pipe.winsys;
  98         size_t size = (size_t)vertex_size * (size_t)nr_vertices;
  99
 100         assert(!nv10_render->buffer);
 101         nv10_render->buffer = winsys->buffer_create(winsys, 64, PIPE_BUFFER_USAGE_VERTEX, size);
 102
 103         nv10->dirty |= NV10_NEW_VBO;
 104
 105         return winsys->buffer_map(winsys,
 106                         nv10_render->buffer,
 107                         PIPE_BUFFER_USAGE_CPU_WRITE);
 108 }
 109
 110
 111 static void
 112 nv10_vbuf_render_set_primitive( struct vbuf_render *render,
 113                 unsigned prim )
 114 {
 115         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 116         nv10_render->hwprim = prim + 1;
 117 }
 118
 119
 120 static void
 121 nv10_vbuf_render_draw( struct vbuf_render *render,
 122                 const ushort *indices,
 123                 uint nr_indices)
 124 {
 125         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 126         struct nv10_context *nv10 = nv10_render->nv10;
 127         int push, i;
 128
 129         BEGIN_RING(celsius, NV10TCL_VERTEX_ARRAY_OFFSET_POS, 1);
 130         OUT_RELOCl(nv10_render->buffer, 0, NOUVEAU_BO_VRAM | NOUVEAU_BO_GART | NOUVEAU_BO_RD);
 131
 132         BEGIN_RING(celsius, NV10TCL_VERTEX_BUFFER_BEGIN_END, 1);
 133         OUT_RING(nv10_render->hwprim);
 134
 135         if (nr_indices & 1) {
 136                 BEGIN_RING(celsius, NV10TCL_VB_ELEMENT_U32, 1);
 137                 OUT_RING  (indices[0]);
 138                 indices++; nr_indices--;
 139         }
 140
 141         while (nr_indices) {
 142                 // XXX too big ?
 143                 push = MIN2(nr_indices, 2047 * 2);
 144
 145                 BEGIN_RING_NI(celsius, NV10TCL_VB_ELEMENT_U16, push >> 1);
 146                 for (i = 0; i < push; i+=2)
 147                         OUT_RING((indices[i+1] << 16) | indices[i]);
 148
 149                 nr_indices -= push;
 150                 indices  += push;
 151         }
 152
 153         BEGIN_RING(celsius, NV10TCL_VERTEX_BUFFER_BEGIN_END, 1);
 154         OUT_RING  (0);
 155 }
 156
 157
 158 static void
 159 nv10_vbuf_render_release_vertices( struct vbuf_render *render,
 160                 void *vertices,
 161                 unsigned vertex_size,
 162                 unsigned vertices_used )
 163 {
 164         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 165         struct nv10_context *nv10 = nv10_render->nv10;
 166         struct pipe_winsys *winsys = nv10->pipe.winsys;
 167
 168         assert(nv10_render->buffer);
 169         winsys->buffer_unmap(winsys, nv10_render->buffer);
 170         pipe_buffer_reference(winsys, &nv10_render->buffer, NULL);
 171 }
 172
 173
 174 static void
 175 nv10_vbuf_render_destroy( struct vbuf_render *render )
 176 {
 177         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 178         FREE(nv10_render);
 179 }
 180
 181
 182 /**
 183  * Create a new primitive render.
 184  */
 185 static struct vbuf_render *
 186 nv10_vbuf_render_create( struct nv10_context *nv10 )
 187 {
 188         struct nv10_vbuf_render *nv10_render = CALLOC_STRUCT(nv10_vbuf_render);
 189
 190         nv10_render->nv10 = nv10;
 191
 192         nv10_render->base.max_vertex_buffer_bytes = 1024*1024;
 193         nv10_render->base.max_indices = 64*1024;
 194         nv10_render->base.get_vertex_info = nv10_vbuf_render_get_vertex_info;
 195         nv10_render->base.allocate_vertices = nv10_vbuf_render_allocate_vertices;
 196         nv10_render->base.set_primitive = nv10_vbuf_render_set_primitive;
 197         nv10_render->base.draw = nv10_vbuf_render_draw;
 198         nv10_render->base.release_vertices = nv10_vbuf_render_release_vertices;
 199         nv10_render->base.destroy = nv10_vbuf_render_destroy;
 200
 201         return &nv10_render->base;
 202 }
 203
 204
 205 /**
 206  * Create a new primitive vbuf/render stage.
 207  */
 208 struct draw_stage *nv10_draw_vbuf_stage( struct nv10_context *nv10 )
 209 {
 210         struct vbuf_render *render;
 211         struct draw_stage *stage;
 212
 213         render = nv10_vbuf_render_create(nv10);
 214         if(!render)
 215                 return NULL;
 216
 217         stage = draw_vbuf_stage( nv10->draw, render );
 218         if(!stage) {
 219                 render->destroy(render);
 220                 return NULL;
 221         }
 222
 223         return stage;
 224 }