src/mesa/state_tracker/st_draw.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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 VMWARE 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  * This file implements the st_draw_vbo() function which is called from
  30  * Mesa's VBO module.  All point/line/triangle rendering is done through
  31  * this function whether the user called glBegin/End, glDrawArrays,
  32  * glDrawElements, glEvalMesh, or glCalList, etc.
  33  *
  34  * Authors:
  35  *   Keith Whitwell <keithw@vmware.com>
  36  */
  37
  38
  39 #include "main/imports.h"
  40 #include "main/image.h"
  41 #include "main/bufferobj.h"
  42 #include "main/macros.h"
  43 #include "main/varray.h"
  44
  45 #include "compiler/glsl/ir_uniform.h"
  46
  47 #include "vbo/vbo.h"
  48
  49 #include "st_context.h"
  50 #include "st_atom.h"
  51 #include "st_cb_bitmap.h"
  52 #include "st_cb_bufferobjects.h"
  53 #include "st_cb_xformfb.h"
  54 #include "st_debug.h"
  55 #include "st_draw.h"
  56 #include "st_program.h"
  57
  58 #include "pipe/p_context.h"
  59 #include "pipe/p_defines.h"
  60 #include "util/u_inlines.h"
  61 #include "util/u_format.h"
  62 #include "util/u_prim.h"
  63 #include "util/u_draw.h"
  64 #include "util/u_upload_mgr.h"
  65 #include "draw/draw_context.h"
  66 #include "cso_cache/cso_context.h"
  67
  68
  69 /**
  70  * This is very similar to vbo_all_varyings_in_vbos() but we are
  71  * only interested in per-vertex data.  See bug 38626.
  72  */
  73 static GLboolean
  74 all_varyings_in_vbos(const struct gl_client_array *arrays[])
  75 {
  76    GLuint i;
  77
  78    for (i = 0; i < VERT_ATTRIB_MAX; i++)
  79       if (arrays[i]->StrideB &&
  80           !arrays[i]->InstanceDivisor &&
  81           !_mesa_is_bufferobj(arrays[i]->BufferObj))
  82          return GL_FALSE;
  83
  84    return GL_TRUE;
  85 }
  86
  87
  88 /**
  89  * Basically, translate Mesa's index buffer information into
  90  * a pipe_index_buffer object.
  91  * \return TRUE or FALSE for success/failure
  92  */
  93 static boolean
  94 setup_index_buffer(struct st_context *st,
  95                    const struct _mesa_index_buffer *ib,
  96                    struct pipe_index_buffer *ibuffer)
  97 {
  98    struct gl_buffer_object *bufobj = ib->obj;
  99
 100    ibuffer->index_size = vbo_sizeof_ib_type(ib->type);
 101
 102    /* get/create the index buffer object */
 103    if (_mesa_is_bufferobj(bufobj)) {
 104       /* indices are in a real VBO */
 105       ibuffer->buffer = st_buffer_object(bufobj)->buffer;
 106       ibuffer->offset = pointer_to_offset(ib->ptr);
 107    }
 108    else if (st->indexbuf_uploader) {
 109       /* upload indexes from user memory into a real buffer */
 110       u_upload_data(st->indexbuf_uploader, 0,
 111                     ib->count * ibuffer->index_size, 4, ib->ptr,
 112                     &ibuffer->offset, &ibuffer->buffer);
 113       if (!ibuffer->buffer) {
 114          /* out of memory */
 115          return FALSE;
 116       }
 117       u_upload_unmap(st->indexbuf_uploader);
 118    }
 119    else {
 120       /* indices are in user space memory */
 121       ibuffer->user_buffer = ib->ptr;
 122    }
 123
 124    cso_set_index_buffer(st->cso_context, ibuffer);
 125    return TRUE;
 126 }
 127
 128
 129 /**
 130  * Set the restart index.
 131  */
 132 static void
 133 setup_primitive_restart(struct gl_context *ctx,
 134                         const struct _mesa_index_buffer *ib,
 135                         struct pipe_draw_info *info)
 136 {
 137    if (ctx->Array._PrimitiveRestart) {
 138       info->restart_index = _mesa_primitive_restart_index(ctx, ib->type);
 139
 140       /* Enable primitive restart only when the restart index can have an
 141        * effect. This is required for correctness in radeonsi VI support.
 142        * Other hardware may also benefit from taking a faster, non-restart path
 143        * when possible.
 144        */
 145       if ((ib->type == GL_UNSIGNED_INT) ||
 146           (ib->type == GL_UNSIGNED_SHORT && info->restart_index <= 0xffff) ||
 147           (ib->type == GL_UNSIGNED_BYTE && info->restart_index <= 0xff))
 148          info->primitive_restart = true;
 149    }
 150 }
 151
 152
 153 /**
 154  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 155  * the corresponding Gallium type.
 156  */
 157 static unsigned
 158 translate_prim(const struct gl_context *ctx, unsigned prim)
 159 {
 160    /* GL prims should match Gallium prims, spot-check a few */
 161    STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
 162    STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
 163    STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 164    STATIC_ASSERT(GL_PATCHES == PIPE_PRIM_PATCHES);
 165
 166    return prim;
 167 }
 168
 169
 170 /**
 171  * This function gets plugged into the VBO module and is called when
 172  * we have something to render.
 173  * Basically, translate the information into the format expected by gallium.
 174  */
 175 void
 176 st_draw_vbo(struct gl_context *ctx,
 177             const struct _mesa_prim *prims,
 178             GLuint nr_prims,
 179             const struct _mesa_index_buffer *ib,
 180             GLboolean index_bounds_valid,
 181             GLuint min_index,
 182             GLuint max_index,
 183             struct gl_transform_feedback_object *tfb_vertcount,
 184             unsigned stream,
 185             struct gl_buffer_object *indirect)
 186 {
 187    struct st_context *st = st_context(ctx);
 188    struct pipe_index_buffer ibuffer = {0};
 189    struct pipe_draw_info info;
 190    const struct gl_client_array **arrays = ctx->Array._DrawArrays;
 191    unsigned i;
 192
 193    /* Mesa core state should have been validated already */
 194    assert(ctx->NewState == 0x0);
 195
 196    st_flush_bitmap_cache(st);
 197    st_invalidate_readpix_cache(st);
 198
 199    /* Validate state. */
 200    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 201        st->gfx_shaders_may_be_dirty) {
 202       st_validate_state(st, ST_PIPELINE_RENDER);
 203    }
 204
 205    if (st->vertex_array_out_of_memory) {
 206       return;
 207    }
 208
 209    util_draw_init_info(&info);
 210
 211    if (ib) {
 212       /* Get index bounds for user buffers. */
 213       if (!index_bounds_valid)
 214          if (!all_varyings_in_vbos(arrays))
 215             vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
 216                                    nr_prims);
 217
 218       if (!setup_index_buffer(st, ib, &ibuffer)) {
 219          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBegin/DrawElements/DrawArray");
 220          return;
 221       }
 222
 223       info.indexed = TRUE;
 224       if (min_index != ~0U && max_index != ~0U) {
 225          info.min_index = min_index;
 226          info.max_index = max_index;
 227       }
 228
 229       /* The VBO module handles restart for the non-indexed GLDrawArrays
 230        * so we only set these fields for indexed drawing:
 231        */
 232       setup_primitive_restart(ctx, ib, &info);
 233    }
 234    else {
 235       /* Transform feedback drawing is always non-indexed. */
 236       /* Set info.count_from_stream_output. */
 237       if (tfb_vertcount) {
 238          if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
 239             return;
 240       }
 241    }
 242
 243    assert(!indirect);
 244
 245    /* do actual drawing */
 246    for (i = 0; i < nr_prims; i++) {
 247       info.mode = translate_prim(ctx, prims[i].mode);
 248       info.start = prims[i].start;
 249       info.count = prims[i].count;
 250       info.start_instance = prims[i].base_instance;
 251       info.instance_count = prims[i].num_instances;
 252       info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 253       info.index_bias = prims[i].basevertex;
 254       info.drawid = prims[i].draw_id;
 255       if (!ib) {
 256          info.min_index = info.start;
 257          info.max_index = info.start + info.count - 1;
 258       }
 259
 260       if (ST_DEBUG & DEBUG_DRAW) {
 261          debug_printf("st/draw: mode %s  start %u  count %u  indexed %d\n",
 262                       u_prim_name(info.mode),
 263                       info.start,
 264                       info.count,
 265                       info.indexed);
 266       }
 267
 268       if (info.count_from_stream_output) {
 269          cso_draw_vbo(st->cso_context, &info);
 270       }
 271       else if (info.primitive_restart) {
 272          /* don't trim, restarts might be inside index list */
 273          cso_draw_vbo(st->cso_context, &info);
 274       }
 275       else if (u_trim_pipe_prim(prims[i].mode, &info.count)) {
 276          cso_draw_vbo(st->cso_context, &info);
 277       }
 278    }
 279
 280    if (ib && st->indexbuf_uploader && !_mesa_is_bufferobj(ib->obj)) {
 281       pipe_resource_reference(&ibuffer.buffer, NULL);
 282    }
 283 }
 284
 285 static void
 286 st_indirect_draw_vbo(struct gl_context *ctx,
 287                      GLuint mode,
 288                      struct gl_buffer_object *indirect_data,
 289                      GLsizeiptr indirect_offset,
 290                      unsigned draw_count,
 291                      unsigned stride,
 292                      struct gl_buffer_object *indirect_params,
 293                      GLsizeiptr indirect_params_offset,
 294                      const struct _mesa_index_buffer *ib)
 295 {
 296    struct st_context *st = st_context(ctx);
 297    struct pipe_index_buffer ibuffer = {0};
 298    struct pipe_draw_info info;
 299
 300    /* Mesa core state should have been validated already */
 301    assert(ctx->NewState == 0x0);
 302    assert(stride);
 303
 304    /* Validate state. */
 305    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 306        st->gfx_shaders_may_be_dirty) {
 307       st_validate_state(st, ST_PIPELINE_RENDER);
 308    }
 309
 310    if (st->vertex_array_out_of_memory) {
 311       return;
 312    }
 313
 314    util_draw_init_info(&info);
 315
 316    if (ib) {
 317       if (!setup_index_buffer(st, ib, &ibuffer)) {
 318          _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDrawElementsIndirect%s",
 319                      (draw_count > 1) ? "Multi" : "",
 320                      indirect_params ? "CountARB" : "");
 321          return;
 322       }
 323
 324       info.indexed = TRUE;
 325
 326       /* Primitive restart is not handled by the VBO module in this case. */
 327       setup_primitive_restart(ctx, ib, &info);
 328    }
 329
 330    info.mode = translate_prim(ctx, mode);
 331    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 332    info.indirect = st_buffer_object(indirect_data)->buffer;
 333    info.indirect_offset = indirect_offset;
 334
 335    if (ST_DEBUG & DEBUG_DRAW) {
 336       debug_printf("st/draw indirect: mode %s drawcount %d indexed %d\n",
 337                    u_prim_name(info.mode),
 338                    draw_count,
 339                    info.indexed);
 340    }
 341
 342    if (!st->has_multi_draw_indirect) {
 343       int i;
 344
 345       assert(!indirect_params);
 346       info.indirect_count = 1;
 347       for (i = 0; i < draw_count; i++) {
 348          info.drawid = i;
 349          cso_draw_vbo(st->cso_context, &info);
 350          info.indirect_offset += stride;
 351       }
 352    } else {
 353       info.indirect_count = draw_count;
 354       info.indirect_stride = stride;
 355       if (indirect_params) {
 356          info.indirect_params = st_buffer_object(indirect_params)->buffer;
 357          info.indirect_params_offset = indirect_params_offset;
 358       }
 359       cso_draw_vbo(st->cso_context, &info);
 360    }
 361 }
 362
 363
 364 void
 365 st_init_draw(struct st_context *st)
 366 {
 367    struct gl_context *ctx = st->ctx;
 368
 369    vbo_set_draw_func(ctx, st_draw_vbo);
 370    vbo_set_indirect_draw_func(ctx, st_indirect_draw_vbo);
 371 }
 372
 373
 374 void
 375 st_destroy_draw(struct st_context *st)
 376 {
 377    draw_destroy(st->draw);
 378 }
 379
 380 /**
 381  * Getter for the draw_context, so that initialization of it can happen only
 382  * when needed (the TGSI exec machines take up quite a bit of memory).
 383  */
 384 struct draw_context *
 385 st_get_draw_context(struct st_context *st)
 386 {
 387    if (!st->draw) {
 388       st->draw = draw_create(st->pipe);
 389       if (!st->draw) {
 390          _mesa_error(st->ctx, GL_OUT_OF_MEMORY, "feedback fallback allocation");
 391          return NULL;
 392       }
 393    }
 394
 395    /* Disable draw options that might convert points/lines to tris, etc.
 396     * as that would foul-up feedback/selection mode.
 397     */
 398    draw_wide_line_threshold(st->draw, 1000.0f);
 399    draw_wide_point_threshold(st->draw, 1000.0f);
 400    draw_enable_line_stipple(st->draw, FALSE);
 401    draw_enable_point_sprites(st->draw, FALSE);
 402
 403    return st->draw;
 404 }
 405
 406 /**
 407  * Draw a quad with given position, texcoords and color.
 408  */
 409 bool
 410 st_draw_quad(struct st_context *st,
 411              float x0, float y0, float x1, float y1, float z,
 412              float s0, float t0, float s1, float t1,
 413              const float *color,
 414              unsigned num_instances)
 415 {
 416    struct pipe_vertex_buffer vb = {0};
 417    struct st_util_vertex *verts;
 418
 419    vb.stride = sizeof(struct st_util_vertex);
 420
 421    u_upload_alloc(st->uploader, 0, 4 * sizeof(struct st_util_vertex), 4,
 422                   &vb.buffer_offset, &vb.buffer, (void **) &verts);
 423    if (!vb.buffer) {
 424       return false;
 425    }
 426
 427    /* lower-left */
 428    verts[0].x = x0;
 429    verts[0].y = y1;
 430    verts[0].z = z;
 431    verts[0].r = color[0];
 432    verts[0].g = color[1];
 433    verts[0].b = color[2];
 434    verts[0].a = color[3];
 435    verts[0].s = s0;
 436    verts[0].t = t0;
 437
 438    /* lower-right */
 439    verts[1].x = x1;
 440    verts[1].y = y1;
 441    verts[1].z = z;
 442    verts[1].r = color[0];
 443    verts[1].g = color[1];
 444    verts[1].b = color[2];
 445    verts[1].a = color[3];
 446    verts[1].s = s1;
 447    verts[1].t = t0;
 448
 449    /* upper-right */
 450    verts[2].x = x1;
 451    verts[2].y = y0;
 452    verts[2].z = z;
 453    verts[2].r = color[0];
 454    verts[2].g = color[1];
 455    verts[2].b = color[2];
 456    verts[2].a = color[3];
 457    verts[2].s = s1;
 458    verts[2].t = t1;
 459
 460    /* upper-left */
 461    verts[3].x = x0;
 462    verts[3].y = y0;
 463    verts[3].z = z;
 464    verts[3].r = color[0];
 465    verts[3].g = color[1];
 466    verts[3].b = color[2];
 467    verts[3].a = color[3];
 468    verts[3].s = s0;
 469    verts[3].t = t1;
 470
 471    u_upload_unmap(st->uploader);
 472
 473    /* At the time of writing, cso_get_aux_vertex_buffer_slot() always returns
 474     * zero.  If that ever changes we need to audit the calls to that function
 475     * and make sure the slot number is used consistently everywhere.
 476     */
 477    assert(cso_get_aux_vertex_buffer_slot(st->cso_context) == 0);
 478
 479    cso_set_vertex_buffers(st->cso_context,
 480                           cso_get_aux_vertex_buffer_slot(st->cso_context),
 481                           1, &vb);
 482
 483    if (num_instances > 1) {
 484       cso_draw_arrays_instanced(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
 485                                 0, num_instances);
 486    } else {
 487       cso_draw_arrays(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
 488    }
 489
 490    pipe_resource_reference(&vb.buffer, NULL);
 491
 492    return true;
 493 }