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         pipe_buffer_reference(&r300->vbo, NULL);
  85         r300render->vbo = pipe_buffer_create(screen,
  86                                              64,
  87                                              PIPE_BUFFER_USAGE_VERTEX,
  88                                              R300_MAX_VBO_SIZE);
  89         r300render->vbo_offset = 0;
  90         r300render->vbo_size = R300_MAX_VBO_SIZE;
  91     }
  92
  93     r300render->vertex_size = vertex_size;
  94     r300->vbo = r300render->vbo;
  95     r300->vbo_offset = r300render->vbo_offset;
  96
  97     return (r300render->vbo) ? TRUE : FALSE;
  98 }
  99
 100 static void* r300_render_map_vertices(struct vbuf_render* render)
 101 {
 102     struct r300_render* r300render = r300_render(render);
 103     struct pipe_screen* screen = r300render->r300->context.screen;
 104
 105     r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
 106                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 107
 108     return (r300render->vbo_ptr + r300render->vbo_offset);
 109 }
 110
 111 static void r300_render_unmap_vertices(struct vbuf_render* render,
 112                                              ushort min,
 113                                              ushort max)
 114 {
 115     struct r300_render* r300render = r300_render(render);
 116     struct pipe_screen* screen = r300render->r300->context.screen;
 117     CS_LOCALS(r300render->r300);
 118     BEGIN_CS(2);
 119     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 120     END_CS;
 121
 122     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 123                                     r300render->vertex_size * (max + 1));
 124     pipe_buffer_unmap(screen, r300render->vbo);
 125 }
 126
 127 static void r300_render_release_vertices(struct vbuf_render* render)
 128 {
 129     struct r300_render* r300render = r300_render(render);
 130     struct r300_context* r300 = r300render->r300;
 131
 132     r300render->vbo_offset += r300render->vbo_max_used;
 133     r300render->vbo_max_used = 0;
 134 }
 135
 136 static boolean r300_render_set_primitive(struct vbuf_render* render,
 137                                                unsigned prim)
 138 {
 139     struct r300_render* r300render = r300_render(render);
 140     r300render->prim = prim;
 141
 142     switch (prim) {
 143         case PIPE_PRIM_POINTS:
 144             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_POINTS;
 145             break;
 146         case PIPE_PRIM_LINES:
 147             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_LINES;
 148             break;
 149         case PIPE_PRIM_LINE_LOOP:
 150             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
 151             break;
 152         case PIPE_PRIM_LINE_STRIP:
 153             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
 154             break;
 155         case PIPE_PRIM_TRIANGLES:
 156             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_TRIANGLES;
 157             break;
 158         case PIPE_PRIM_TRIANGLE_STRIP:
 159             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
 160             break;
 161         case PIPE_PRIM_TRIANGLE_FAN:
 162             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
 163             break;
 164         case PIPE_PRIM_QUADS:
 165             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_QUADS;
 166             break;
 167         case PIPE_PRIM_QUAD_STRIP:
 168             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
 169             break;
 170         case PIPE_PRIM_POLYGON:
 171             r300render->hwprim = R300_VAP_VF_CNTL__PRIM_POLYGON;
 172             break;
 173         default:
 174             return FALSE;
 175             break;
 176     }
 177
 178     return TRUE;
 179 }
 180
 181 static void r300_prepare_render(struct r300_render* render, unsigned count)
 182 {
 183     struct r300_context* r300 = render->r300;
 184
 185     CS_LOCALS(r300);
 186
 187     r300_emit_dirty_state(r300);
 188 }
 189
 190 static void r300_render_draw_arrays(struct vbuf_render* render,
 191                                           unsigned start,
 192                                           unsigned count)
 193 {
 194     struct r300_render* r300render = r300_render(render);
 195     struct r300_context* r300 = r300render->r300;
 196
 197     CS_LOCALS(r300);
 198
 199     r300_prepare_render(r300render, count);
 200
 201     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 202
 203     BEGIN_CS(2);
 204     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 205     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 206            r300render->hwprim);
 207     END_CS;
 208 }
 209
 210 static void r300_render_draw(struct vbuf_render* render,
 211                                    const ushort* indices,
 212                                    uint count)
 213 {
 214     struct r300_render* r300render = r300_render(render);
 215     struct r300_context* r300 = r300render->r300;
 216     struct pipe_screen* screen = r300->context.screen;
 217     struct pipe_buffer* index_buffer;
 218     void* index_map;
 219     int i;
 220     uint32_t index;
 221
 222     CS_LOCALS(r300);
 223
 224     r300_prepare_render(r300render, count);
 225
 226     BEGIN_CS(2 + (count+1)/2);
 227     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 228     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 229            r300render->hwprim);
 230     for (i = 0; i < count-1; i += 2) {
 231         OUT_CS(indices[i+1] << 16 | indices[i]);
 232     }
 233     if (count % 2) {
 234         OUT_CS(indices[count-1]);
 235     }
 236     END_CS;
 237 }
 238
 239 static void r300_render_destroy(struct vbuf_render* render)
 240 {
 241     FREE(render);
 242 }
 243
 244 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 245 {
 246     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 247
 248     r300render->r300 = r300;
 249
 250     /* XXX find real numbers plz */
 251     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 252     r300render->base.max_indices = 16 * 1024;
 253
 254     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 255     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 256     r300render->base.map_vertices = r300_render_map_vertices;
 257     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 258     r300render->base.set_primitive = r300_render_set_primitive;
 259     r300render->base.draw = r300_render_draw;
 260     r300render->base.draw_arrays = r300_render_draw_arrays;
 261     r300render->base.release_vertices = r300_render_release_vertices;
 262     r300render->base.destroy = r300_render_destroy;
 263
 264     r300render->vbo = NULL;
 265     r300render->vbo_size = 0;
 266     r300render->vbo_offset = 0;
 267
 268     return &r300render->base;
 269 }
 270
 271 struct draw_stage* r300_draw_stage(struct r300_context* r300)
 272 {
 273     struct vbuf_render* render;
 274     struct draw_stage* stage;
 275
 276     render = r300_render_create(r300);
 277
 278     if (!render) {
 279         return NULL;
 280     }
 281
 282     stage = draw_vbuf_stage(r300->draw, render);
 283
 284     if (!stage) {
 285         render->destroy(render);
 286         return NULL;
 287     }
 288
 289     draw_set_render(r300->draw, render);
 290
 291     return stage;
 292 }