src/gallium/drivers/nv20/nv20_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 "pipe/p_debug.h"
  42 #include "pipe/p_inlines.h"
  43 #include "pipe/p_winsys.h"
  44
  45 #include "nv20_context.h"
  46 #include "nv20_state.h"
  47
  48 #include "draw/draw_vbuf.h"
  49
  50 /**
  51  * Primitive renderer for nv20.
  52  */
  53 struct nv20_vbuf_render {
  54         struct vbuf_render base;
  55
  56         struct nv20_context *nv20;
  57
  58         /** Vertex buffer */
  59         struct pipe_buffer* buffer;
  60
  61         /** Vertex size in bytes */
  62         unsigned vertex_size;
  63
  64         /** Hardware primitive */
  65         unsigned hwprim;
  66 };
  67
  68
  69 void nv20_vtxbuf_bind( struct nv20_context* nv20 )
  70 {
  71         int i;
  72         for(i = 0; i < 8; i++) {
  73                 BEGIN_RING(kelvin, NV10TCL_VERTEX_ARRAY_ATTRIB_OFFSET(i), 1);
  74                 OUT_RING(0/*nv20->vtxbuf*/);
  75                 BEGIN_RING(kelvin, NV10TCL_VERTEX_ARRAY_ATTRIB_FORMAT(i) ,1);
  76                 OUT_RING(0/*XXX*/);
  77         }
  78 }
  79
  80 /**
  81  * Basically a cast wrapper.
  82  */
  83 static INLINE struct nv20_vbuf_render *
  84 nv20_vbuf_render( struct vbuf_render *render )
  85 {
  86         assert(render);
  87         return (struct nv20_vbuf_render *)render;
  88 }
  89
  90
  91 static const struct vertex_info *
  92 nv20_vbuf_render_get_vertex_info( struct vbuf_render *render )
  93 {
  94         struct nv20_vbuf_render *nv20_render = nv20_vbuf_render(render);
  95         struct nv20_context *nv20 = nv20_render->nv20;
  96
  97         nv20_emit_hw_state(nv20);
  98
  99         return &nv20->vertex_info;
 100 }
 101
 102
 103 static void *
 104 nv20_vbuf_render_allocate_vertices( struct vbuf_render *render,
 105                 ushort vertex_size,
 106                 ushort nr_vertices )
 107 {
 108         struct nv20_vbuf_render *nv20_render = nv20_vbuf_render(render);
 109         struct nv20_context *nv20 = nv20_render->nv20;
 110         struct pipe_winsys *winsys = nv20->pipe.winsys;
 111         size_t size = (size_t)vertex_size * (size_t)nr_vertices;
 112
 113         assert(!nv20_render->buffer);
 114         nv20_render->buffer = winsys->buffer_create(winsys, 64, PIPE_BUFFER_USAGE_VERTEX, size);
 115
 116         nv20->dirty |= NV20_NEW_VTXARRAYS;
 117
 118         return winsys->buffer_map(winsys,
 119                         nv20_render->buffer,
 120                         PIPE_BUFFER_USAGE_CPU_WRITE);
 121 }
 122
 123
 124 static void
 125 nv20_vbuf_render_set_primitive( struct vbuf_render *render,
 126                 unsigned prim )
 127 {
 128         struct nv20_vbuf_render *nv20_render = nv20_vbuf_render(render);
 129         nv20_render->hwprim = prim + 1;
 130 }
 131
 132
 133 static void
 134 nv20_vbuf_render_draw( struct vbuf_render *render,
 135                 const ushort *indices,
 136                 uint nr_indices)
 137 {
 138         struct nv20_vbuf_render *nv20_render = nv20_vbuf_render(render);
 139         struct nv20_context *nv20 = nv20_render->nv20;
 140         int push, i;
 141
 142         nv20_emit_hw_state(nv20);
 143
 144         BEGIN_RING(kelvin, NV10TCL_VERTEX_ARRAY_OFFSET_POS, 1);
 145         OUT_RELOCl(nv20_render->buffer, 0, NOUVEAU_BO_VRAM | NOUVEAU_BO_GART | NOUVEAU_BO_RD);
 146
 147         BEGIN_RING(kelvin, NV10TCL_VERTEX_BUFFER_BEGIN_END, 1);
 148         OUT_RING(nv20_render->hwprim);
 149
 150         if (nr_indices & 1) {
 151                 BEGIN_RING(kelvin, NV10TCL_VB_ELEMENT_U32, 1);
 152                 OUT_RING  (indices[0]);
 153                 indices++; nr_indices--;
 154         }
 155
 156         while (nr_indices) {
 157                 // XXX too big/small ? check the size
 158                 push = MIN2(nr_indices, 1200 * 2);
 159
 160                 BEGIN_RING_NI(kelvin, NV10TCL_VB_ELEMENT_U16, push >> 1);
 161                 for (i = 0; i < push; i+=2)
 162                         OUT_RING((indices[i+1] << 16) | indices[i]);
 163
 164                 nr_indices -= push;
 165                 indices  += push;
 166         }
 167
 168         BEGIN_RING(kelvin, NV10TCL_VERTEX_BUFFER_BEGIN_END, 1);
 169         OUT_RING  (0);
 170 }
 171
 172
 173 static void
 174 nv20_vbuf_render_release_vertices( struct vbuf_render *render,
 175                 void *vertices,
 176                 unsigned vertex_size,
 177                 unsigned vertices_used )
 178 {
 179         struct nv20_vbuf_render *nv20_render = nv20_vbuf_render(render);
 180         struct nv20_context *nv20 = nv20_render->nv20;
 181         struct pipe_winsys *winsys = nv20->pipe.winsys;
 182         struct pipe_screen *pscreen = &nv20->screen->pipe;
 183
 184         assert(nv20_render->buffer);
 185         winsys->buffer_unmap(winsys, nv20_render->buffer);
 186         pipe_buffer_reference(pscreen, &nv20_render->buffer, NULL);
 187 }
 188
 189
 190 static void
 191 nv20_vbuf_render_destroy( struct vbuf_render *render )
 192 {
 193         struct nv20_vbuf_render *nv20_render = nv20_vbuf_render(render);
 194         FREE(nv20_render);
 195 }
 196
 197
 198 /**
 199  * Create a new primitive render.
 200  */
 201 static struct vbuf_render *
 202 nv20_vbuf_render_create( struct nv20_context *nv20 )
 203 {
 204         struct nv20_vbuf_render *nv20_render = CALLOC_STRUCT(nv20_vbuf_render);
 205
 206         nv20_render->nv20 = nv20;
 207
 208         nv20_render->base.max_vertex_buffer_bytes = 16*1024;
 209         nv20_render->base.max_indices = 1024;
 210         nv20_render->base.get_vertex_info = nv20_vbuf_render_get_vertex_info;
 211         nv20_render->base.allocate_vertices = nv20_vbuf_render_allocate_vertices;
 212         nv20_render->base.set_primitive = nv20_vbuf_render_set_primitive;
 213         nv20_render->base.draw = nv20_vbuf_render_draw;
 214         nv20_render->base.release_vertices = nv20_vbuf_render_release_vertices;
 215         nv20_render->base.destroy = nv20_vbuf_render_destroy;
 216
 217         return &nv20_render->base;
 218 }
 219
 220
 221 /**
 222  * Create a new primitive vbuf/render stage.
 223  */
 224 struct draw_stage *nv20_draw_vbuf_stage( struct nv20_context *nv20 )
 225 {
 226         struct vbuf_render *render;
 227         struct draw_stage *stage;
 228
 229         render = nv20_vbuf_render_create(nv20);
 230         if(!render)
 231                 return NULL;
 232
 233         stage = draw_vbuf_stage( nv20->draw, render );
 234         if(!stage) {
 235                 render->destroy(render);
 236                 return NULL;
 237         }
 238
 239         return stage;
 240 }