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 void nv10_vtxbuf_bind( struct nv10_context* nv10 )
  71 {
  72         int i;
  73         for(i = 0; i < 8; i++) {
  74                 BEGIN_RING(celsius, NV10TCL_VERTEX_ARRAY_ATTRIB_OFFSET(i), 1);
  75                 OUT_RING(0/*nv10->vtxbuf*/);
  76                 BEGIN_RING(celsius, NV10TCL_VERTEX_ARRAY_ATTRIB_FORMAT(i) ,1);
  77                 OUT_RING(0/*XXX*/);
  78         }
  79 }
  80
  81 /**
  82  * Basically a cast wrapper.
  83  */
  84 static INLINE struct nv10_vbuf_render *
  85 nv10_vbuf_render( struct vbuf_render *render )
  86 {
  87         assert(render);
  88         return (struct nv10_vbuf_render *)render;
  89 }
  90
  91
  92 static const struct vertex_info *
  93 nv10_vbuf_render_get_vertex_info( struct vbuf_render *render )
  94 {
  95         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
  96         struct nv10_context *nv10 = nv10_render->nv10;
  97
  98         nv10_emit_hw_state(nv10);
  99
 100         return &nv10->vertex_info;
 101 }
 102
 103
 104 static void *
 105 nv10_vbuf_render_allocate_vertices( struct vbuf_render *render,
 106                 ushort vertex_size,
 107                 ushort nr_vertices )
 108 {
 109         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 110         struct nv10_context *nv10 = nv10_render->nv10;
 111         struct pipe_winsys *winsys = nv10->pipe.winsys;
 112         size_t size = (size_t)vertex_size * (size_t)nr_vertices;
 113
 114         assert(!nv10_render->buffer);
 115         nv10_render->buffer = winsys->buffer_create(winsys, 64, PIPE_BUFFER_USAGE_VERTEX, size);
 116
 117         nv10->dirty |= NV10_NEW_VTXARRAYS;
 118
 119         return winsys->buffer_map(winsys,
 120                         nv10_render->buffer,
 121                         PIPE_BUFFER_USAGE_CPU_WRITE);
 122 }
 123
 124
 125 static void
 126 nv10_vbuf_render_set_primitive( struct vbuf_render *render,
 127                 unsigned prim )
 128 {
 129         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 130         nv10_render->hwprim = prim + 1;
 131 }
 132
 133
 134 static void
 135 nv10_vbuf_render_draw( struct vbuf_render *render,
 136                 const ushort *indices,
 137                 uint nr_indices)
 138 {
 139         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 140         struct nv10_context *nv10 = nv10_render->nv10;
 141         int push, i;
 142
 143         nv10_emit_hw_state(nv10);
 144
 145         BEGIN_RING(celsius, NV10TCL_VERTEX_ARRAY_OFFSET_POS, 1);
 146         OUT_RELOCl(nv10_render->buffer, 0, NOUVEAU_BO_VRAM | NOUVEAU_BO_GART | NOUVEAU_BO_RD);
 147
 148         BEGIN_RING(celsius, NV10TCL_VERTEX_BUFFER_BEGIN_END, 1);
 149         OUT_RING(nv10_render->hwprim);
 150
 151         if (nr_indices & 1) {
 152                 BEGIN_RING(celsius, NV10TCL_VB_ELEMENT_U32, 1);
 153                 OUT_RING  (indices[0]);
 154                 indices++; nr_indices--;
 155         }
 156
 157         while (nr_indices) {
 158                 // XXX too big/small ? check the size
 159                 push = MIN2(nr_indices, 1200 * 2);
 160
 161                 BEGIN_RING_NI(celsius, NV10TCL_VB_ELEMENT_U16, push >> 1);
 162                 for (i = 0; i < push; i+=2)
 163                         OUT_RING((indices[i+1] << 16) | indices[i]);
 164
 165                 nr_indices -= push;
 166                 indices  += push;
 167         }
 168
 169         BEGIN_RING(celsius, NV10TCL_VERTEX_BUFFER_BEGIN_END, 1);
 170         OUT_RING  (0);
 171 }
 172
 173
 174 static void
 175 nv10_vbuf_render_release_vertices( struct vbuf_render *render,
 176                 void *vertices,
 177                 unsigned vertex_size,
 178                 unsigned vertices_used )
 179 {
 180         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 181         struct nv10_context *nv10 = nv10_render->nv10;
 182         struct pipe_winsys *winsys = nv10->pipe.winsys;
 183
 184         assert(nv10_render->buffer);
 185         winsys->buffer_unmap(winsys, nv10_render->buffer);
 186         pipe_buffer_reference(winsys, &nv10_render->buffer, NULL);
 187 }
 188
 189
 190 static void
 191 nv10_vbuf_render_destroy( struct vbuf_render *render )
 192 {
 193         struct nv10_vbuf_render *nv10_render = nv10_vbuf_render(render);
 194         FREE(nv10_render);
 195 }
 196
 197
 198 /**
 199  * Create a new primitive render.
 200  */
 201 static struct vbuf_render *
 202 nv10_vbuf_render_create( struct nv10_context *nv10 )
 203 {
 204         struct nv10_vbuf_render *nv10_render = CALLOC_STRUCT(nv10_vbuf_render);
 205
 206         nv10_render->nv10 = nv10;
 207
 208         nv10_render->base.max_vertex_buffer_bytes = 16*1024;
 209         nv10_render->base.max_indices = 1024;
 210         nv10_render->base.get_vertex_info = nv10_vbuf_render_get_vertex_info;
 211         nv10_render->base.allocate_vertices = nv10_vbuf_render_allocate_vertices;
 212         nv10_render->base.set_primitive = nv10_vbuf_render_set_primitive;
 213         nv10_render->base.draw = nv10_vbuf_render_draw;
 214         nv10_render->base.release_vertices = nv10_vbuf_render_release_vertices;
 215         nv10_render->base.destroy = nv10_vbuf_render_destroy;
 216
 217         return &nv10_render->base;
 218 }
 219
 220
 221 /**
 222  * Create a new primitive vbuf/render stage.
 223  */
 224 struct draw_stage *nv10_draw_vbuf_stage( struct nv10_context *nv10 )
 225 {
 226         struct vbuf_render *render;
 227         struct draw_stage *stage;
 228
 229         render = nv10_vbuf_render_create(nv10);
 230         if(!render)
 231                 return NULL;
 232
 233         stage = draw_vbuf_stage( nv10->draw, render );
 234         if(!stage) {
 235                 render->destroy(render);
 236                 return NULL;
 237         }
 238
 239         return stage;
 240 }