src/gallium/drivers/r300/r300_render.c

   1 /*
   2  * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "draw/draw_pipe.h"
  24 #include "draw/draw_vbuf.h"
  25 #include "util/u_memory.h"
  26
  27 #include "r300_cs.h"
  28 #include "r300_context.h"
  29 #include "r300_emit.h"
  30 #include "r300_reg.h"
  31 #include "r300_state_derived.h"
  32
  33 /* r300_render: Vertex and index buffer primitive emission. */
  34 #define R300_MAX_VBO_SIZE  (1024 * 1024)
  35
  36 struct r300_render {
  37     /* Parent class */
  38     struct vbuf_render base;
  39
  40     /* Pipe context */
  41     struct r300_context* r300;
  42
  43     /* Vertex information */
  44     size_t vertex_size;
  45     unsigned prim;
  46     unsigned hwprim;
  47
  48     /* VBO */
  49     struct pipe_buffer* vbo;
  50     size_t vbo_size;
  51     size_t vbo_offset;
  52     size_t vbo_max_used;
  53     void * vbo_ptr;
  54 };
  55
  56 static INLINE struct r300_render*
  57 r300_render(struct vbuf_render* render)
  58 {
  59     return (struct r300_render*)render;
  60 }
  61
  62 static const struct vertex_info*
  63 r300_render_get_vertex_info(struct vbuf_render* render)
  64 {
  65     struct r300_render* r300render = r300_render(render);
  66     struct r300_context* r300 = r300render->r300;
  67
  68     r300_update_derived_state(r300);
  69
  70     return &r300->vertex_info.vinfo;
  71 }
  72
  73 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
  74                                                    ushort vertex_size,
  75                                                    ushort count)
  76 {
  77     struct r300_render* r300render = r300_render(render);
  78     struct r300_context* r300 = r300render->r300;
  79     struct pipe_screen* screen = r300->context.screen;
  80     size_t size = (size_t)vertex_size * (size_t)count;
  81
  82     if (size + r300render->vbo_offset > r300render->vbo_size)
  83     {
  84         r300render->vbo = pipe_buffer_create(screen,
  85                                              64,
  86                                              PIPE_BUFFER_USAGE_VERTEX,
  87                                              R300_MAX_VBO_SIZE);
  88         r300render->vbo_size = R300_MAX_VBO_SIZE;
  89     }
  90
  91     r300render->vertex_size = vertex_size;
  92     r300->vbo = r300render->vbo;
  93     r300->vbo_offset = r300render->vbo_offset;
  94
  95     return (r300render->vbo) ? TRUE : FALSE;
  96 }
  97
  98 static void* r300_render_map_vertices(struct vbuf_render* render)
  99 {
 100     struct r300_render* r300render = r300_render(render);
 101     struct pipe_screen* screen = r300render->r300->context.screen;
 102
 103     r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
 104                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 105
 106     return (r300render->vbo_ptr + r300render->vbo_offset);
 107 }
 108
 109 static void r300_render_unmap_vertices(struct vbuf_render* render,
 110                                              ushort min,
 111                                              ushort max)
 112 {
 113     struct r300_render* r300render = r300_render(render);
 114     struct pipe_screen* screen = r300render->r300->context.screen;
 115     CS_LOCALS(r300render->r300);
 116     BEGIN_CS(2);
 117     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 118     END_CS;
 119
 120     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 121                                     r300render->vertex_size * (max + 1));
 122     pipe_buffer_unmap(screen, r300render->vbo);
 123 }
 124
 125 static void r300_render_release_vertices(struct vbuf_render* render)
 126 {
 127     struct r300_render* r300render = r300_render(render);
 128     struct r300_context* r300 = r300render->r300;
 129
 130     r300render->vbo_offset += r300render->vbo_max_used;
 131     r300render->vbo_max_used = 0;
 132     r300->vbo = NULL;
 133 }
 134
 135 static boolean r300_render_set_primitive(struct vbuf_render* render,
 136                                                unsigned prim)
 137 {
 138     struct r300_render* r300render = r300_render(render);
 139     r300render->prim = prim;
 140
 141     switch (prim) {
 142         case PIPE_PRIM_POINTS:
 143             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_POINTS;
 144             break;
 145         case PIPE_PRIM_LINES:
 146             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_LINES;
 147             break;
 148         case PIPE_PRIM_LINE_LOOP:
 149             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
 150             break;
 151         case PIPE_PRIM_LINE_STRIP:
 152             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
 153             break;
 154         case PIPE_PRIM_TRIANGLES:
 155             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_TRIANGLES;
 156             break;
 157         case PIPE_PRIM_TRIANGLE_STRIP:
 158             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
 159             break;
 160         case PIPE_PRIM_TRIANGLE_FAN:
 161             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
 162             break;
 163         case PIPE_PRIM_QUADS:
 164             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_QUADS;
 165             break;
 166         case PIPE_PRIM_QUAD_STRIP:
 167             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
 168             break;
 169         case PIPE_PRIM_POLYGON:
 170             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_POLYGON;
 171             break;
 172         default:
 173             return FALSE;
 174             break;
 175     }
 176
 177     return TRUE;
 178 }
 179
 180 static void r300_prepare_render(struct r300_render* render, unsigned count)
 181 {
 182     struct r300_context* r300 = render->r300;
 183
 184     CS_LOCALS(r300);
 185
 186     r300_emit_dirty_state(r300);
 187 }
 188
 189 static void r300_render_draw_arrays(struct vbuf_render* render,
 190                                           unsigned start,
 191                                           unsigned count)
 192 {
 193     struct r300_render* r300render = r300_render(render);
 194     struct r300_context* r300 = r300render->r300;
 195
 196     CS_LOCALS(r300);
 197
 198     r300_prepare_render(r300render, count);
 199
 200     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 201
 202     BEGIN_CS(2);
 203     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 204     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 205            r300render->hwprim);
 206     END_CS;
 207 }
 208
 209 static void r300_render_draw(struct vbuf_render* render,
 210                                    const ushort* indices,
 211                                    uint count)
 212 {
 213     struct r300_render* r300render = r300_render(render);
 214     struct r300_context* r300 = r300render->r300;
 215     struct pipe_screen* screen = r300->context.screen;
 216     struct pipe_buffer* index_buffer;
 217     void* index_map;
 218     int i;
 219     uint32_t index;
 220
 221     CS_LOCALS(r300);
 222
 223     r300_prepare_render(r300render, count);
 224
 225     /* Send our indices into an index buffer. */
 226     index_buffer = pipe_buffer_create(screen, 64, PIPE_BUFFER_USAGE_VERTEX,
 227                                       count * 2);
 228     if (!index_buffer) {
 229         return;
 230     }
 231
 232     BEGIN_CS(2 + (count+1)/2);
 233     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 234     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 235            r300render->hwprim);
 236     for (i = 0; i < count-1; i += 2) {
 237         OUT_CS(indices[i+1] << 16 | indices[i]);
 238     }
 239     if (count % 2) {
 240         OUT_CS(indices[count-1]);
 241     }
 242     END_CS;
 243 }
 244
 245 static void r300_render_destroy(struct vbuf_render* render)
 246 {
 247     FREE(render);
 248 }
 249
 250 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 251 {
 252     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 253
 254     r300render->r300 = r300;
 255
 256     /* XXX find real numbers plz */
 257     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 258     r300render->base.max_indices = 16 * 1024;
 259
 260     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 261     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 262     r300render->base.map_vertices = r300_render_map_vertices;
 263     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 264     r300render->base.set_primitive = r300_render_set_primitive;
 265     r300render->base.draw = r300_render_draw;
 266     r300render->base.draw_arrays = r300_render_draw_arrays;
 267     r300render->base.release_vertices = r300_render_release_vertices;
 268     r300render->base.destroy = r300_render_destroy;
 269
 270     r300render->vbo = NULL;
 271     r300render->vbo_size = 0;
 272     r300render->vbo_offset = 0;
 273
 274     return &r300render->base;
 275 }
 276
 277 struct draw_stage* r300_draw_stage(struct r300_context* r300)
 278 {
 279     struct vbuf_render* render;
 280     struct draw_stage* stage;
 281
 282     render = r300_render_create(r300);
 283
 284     if (!render) {
 285         return NULL;
 286     }
 287
 288     stage = draw_vbuf_stage(r300->draw, render);
 289
 290     if (!stage) {
 291         render->destroy(render);
 292         return NULL;
 293     }
 294
 295     draw_set_render(r300->draw, render);
 296
 297     return stage;
 298 }