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/errors.h"
  40 #include "main/imports.h"
  41 #include "main/image.h"
  42 #include "main/bufferobj.h"
  43 #include "main/macros.h"
  44 #include "main/varray.h"
  45
  46 #include "compiler/glsl/ir_uniform.h"
  47
  48 #include "vbo/vbo.h"
  49
  50 #include "st_context.h"
  51 #include "st_atom.h"
  52 #include "st_cb_bitmap.h"
  53 #include "st_cb_bufferobjects.h"
  54 #include "st_cb_xformfb.h"
  55 #include "st_debug.h"
  56 #include "st_draw.h"
  57 #include "st_program.h"
  58
  59 #include "pipe/p_context.h"
  60 #include "pipe/p_defines.h"
  61 #include "util/u_inlines.h"
  62 #include "util/u_format.h"
  63 #include "util/u_prim.h"
  64 #include "util/u_draw.h"
  65 #include "util/u_upload_mgr.h"
  66 #include "draw/draw_context.h"
  67 #include "cso_cache/cso_context.h"
  68
  69
  70 /**
  71  * Set the restart index.
  72  */
  73 static void
  74 setup_primitive_restart(struct gl_context *ctx, struct pipe_draw_info *info)
  75 {
  76    if (ctx->Array._PrimitiveRestart) {
  77       unsigned index_size = info->index_size;
  78
  79       info->restart_index =
  80          _mesa_primitive_restart_index(ctx, index_size);
  81
  82       /* Enable primitive restart only when the restart index can have an
  83        * effect. This is required for correctness in radeonsi VI support.
  84        * Other hardware may also benefit from taking a faster, non-restart path
  85        * when possible.
  86        */
  87       if (index_size == 4 || info->restart_index < (1 << (index_size * 8)))
  88          info->primitive_restart = true;
  89    }
  90 }
  91
  92
  93 /**
  94  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
  95  * the corresponding Gallium type.
  96  */
  97 static unsigned
  98 translate_prim(const struct gl_context *ctx, unsigned prim)
  99 {
 100    /* GL prims should match Gallium prims, spot-check a few */
 101    STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
 102    STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
 103    STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 104    STATIC_ASSERT(GL_PATCHES == PIPE_PRIM_PATCHES);
 105
 106    return prim;
 107 }
 108
 109 static inline void
 110 prepare_draw(struct st_context *st, struct gl_context *ctx)
 111 {
 112    /* Mesa core state should have been validated already */
 113    assert(ctx->NewState == 0x0);
 114
 115    if (unlikely(!st->bitmap.cache.empty))
 116       st_flush_bitmap_cache(st);
 117
 118    st_invalidate_readpix_cache(st);
 119
 120    /* Validate state. */
 121    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 122        st->gfx_shaders_may_be_dirty) {
 123       st_validate_state(st, ST_PIPELINE_RENDER);
 124    }
 125 }
 126
 127 /**
 128  * This function gets plugged into the VBO module and is called when
 129  * we have something to render.
 130  * Basically, translate the information into the format expected by gallium.
 131  */
 132 static void
 133 st_draw_vbo(struct gl_context *ctx,
 134             const struct _mesa_prim *prims,
 135             GLuint nr_prims,
 136             const struct _mesa_index_buffer *ib,
 137             GLboolean index_bounds_valid,
 138             GLuint min_index,
 139             GLuint max_index,
 140             struct gl_transform_feedback_object *tfb_vertcount,
 141             unsigned stream,
 142             struct gl_buffer_object *indirect)
 143 {
 144    struct st_context *st = st_context(ctx);
 145    struct pipe_draw_info info;
 146    unsigned i;
 147    unsigned start = 0;
 148
 149    /* The initial pushdown of the inputs array into the drivers */
 150    _mesa_set_drawing_arrays(ctx, st->draw_arrays.inputs);
 151    _vbo_update_inputs(ctx, &st->draw_arrays);
 152
 153    prepare_draw(st, ctx);
 154
 155    if (st->vertex_array_out_of_memory)
 156       return;
 157
 158    /* Initialize pipe_draw_info. */
 159    info.primitive_restart = false;
 160    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 161    info.indirect = NULL;
 162    info.count_from_stream_output = NULL;
 163
 164    if (ib) {
 165       struct gl_buffer_object *bufobj = ib->obj;
 166
 167       /* Get index bounds for user buffers. */
 168       if (!index_bounds_valid && st->draw_needs_minmax_index) {
 169          vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
 170                                 nr_prims);
 171       }
 172
 173       info.index_size = ib->index_size;
 174       info.min_index = min_index;
 175       info.max_index = max_index;
 176
 177       if (_mesa_is_bufferobj(bufobj)) {
 178          /* indices are in a real VBO */
 179          info.has_user_indices = false;
 180          info.index.resource = st_buffer_object(bufobj)->buffer;
 181
 182          /* Return if the bound element array buffer doesn't have any backing
 183           * storage. (nothing to do)
 184           */
 185          if (!info.index.resource)
 186             return;
 187
 188          start = pointer_to_offset(ib->ptr) / info.index_size;
 189       } else {
 190          /* indices are in user space memory */
 191          info.has_user_indices = true;
 192          info.index.user = ib->ptr;
 193       }
 194
 195       setup_primitive_restart(ctx, &info);
 196    }
 197    else {
 198       info.index_size = 0;
 199       info.has_user_indices = false;
 200
 201       /* Transform feedback drawing is always non-indexed. */
 202       /* Set info.count_from_stream_output. */
 203       if (tfb_vertcount) {
 204          if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
 205             return;
 206       }
 207    }
 208
 209    assert(!indirect);
 210
 211    /* do actual drawing */
 212    for (i = 0; i < nr_prims; i++) {
 213       info.count = prims[i].count;
 214
 215       /* Skip no-op draw calls. */
 216       if (!info.count && !tfb_vertcount)
 217          continue;
 218
 219       info.mode = translate_prim(ctx, prims[i].mode);
 220       info.start = start + prims[i].start;
 221       info.start_instance = prims[i].base_instance;
 222       info.instance_count = prims[i].num_instances;
 223       info.index_bias = prims[i].basevertex;
 224       info.drawid = prims[i].draw_id;
 225       if (!ib) {
 226          info.min_index = info.start;
 227          info.max_index = info.start + info.count - 1;
 228       }
 229
 230       if (ST_DEBUG & DEBUG_DRAW) {
 231          debug_printf("st/draw: mode %s  start %u  count %u  index_size %d\n",
 232                       u_prim_name(info.mode),
 233                       info.start,
 234                       info.count,
 235                       info.index_size);
 236       }
 237
 238       /* Don't call u_trim_pipe_prim. Drivers should do it if they need it. */
 239       cso_draw_vbo(st->cso_context, &info);
 240    }
 241 }
 242
 243 static void
 244 st_indirect_draw_vbo(struct gl_context *ctx,
 245                      GLuint mode,
 246                      struct gl_buffer_object *indirect_data,
 247                      GLsizeiptr indirect_offset,
 248                      unsigned draw_count,
 249                      unsigned stride,
 250                      struct gl_buffer_object *indirect_draw_count,
 251                      GLsizeiptr indirect_draw_count_offset,
 252                      const struct _mesa_index_buffer *ib)
 253 {
 254    struct st_context *st = st_context(ctx);
 255    struct pipe_draw_info info;
 256    struct pipe_draw_indirect_info indirect;
 257
 258    /* The initial pushdown of the inputs array into the drivers */
 259    _mesa_set_drawing_arrays(ctx, st->draw_arrays.inputs);
 260    _vbo_update_inputs(ctx, &st->draw_arrays);
 261
 262    assert(stride);
 263    prepare_draw(st, ctx);
 264
 265    if (st->vertex_array_out_of_memory)
 266       return;
 267
 268    memset(&indirect, 0, sizeof(indirect));
 269    util_draw_init_info(&info);
 270    info.start = 0; /* index offset / index size */
 271
 272    if (ib) {
 273       struct gl_buffer_object *bufobj = ib->obj;
 274
 275       /* indices are always in a real VBO */
 276       assert(_mesa_is_bufferobj(bufobj));
 277
 278       info.index_size = ib->index_size;
 279       info.index.resource = st_buffer_object(bufobj)->buffer;
 280       info.start = pointer_to_offset(ib->ptr) / info.index_size;
 281
 282       /* Primitive restart is not handled by the VBO module in this case. */
 283       setup_primitive_restart(ctx, &info);
 284    }
 285
 286    info.mode = translate_prim(ctx, mode);
 287    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 288    info.indirect = &indirect;
 289    indirect.buffer = st_buffer_object(indirect_data)->buffer;
 290    indirect.offset = indirect_offset;
 291
 292    if (ST_DEBUG & DEBUG_DRAW) {
 293       debug_printf("st/draw indirect: mode %s drawcount %d index_size %d\n",
 294                    u_prim_name(info.mode),
 295                    draw_count,
 296                    info.index_size);
 297    }
 298
 299    if (!st->has_multi_draw_indirect) {
 300       int i;
 301
 302       assert(!indirect_draw_count);
 303       indirect.draw_count = 1;
 304       for (i = 0; i < draw_count; i++) {
 305          info.drawid = i;
 306          cso_draw_vbo(st->cso_context, &info);
 307          indirect.offset += stride;
 308       }
 309    } else {
 310       indirect.draw_count = draw_count;
 311       indirect.stride = stride;
 312       if (indirect_draw_count) {
 313          indirect.indirect_draw_count =
 314             st_buffer_object(indirect_draw_count)->buffer;
 315          indirect.indirect_draw_count_offset = indirect_draw_count_offset;
 316       }
 317       cso_draw_vbo(st->cso_context, &info);
 318    }
 319 }
 320
 321
 322 void
 323 st_init_draw_functions(struct dd_function_table *functions)
 324 {
 325    functions->Draw = st_draw_vbo;
 326    functions->DrawIndirect = st_indirect_draw_vbo;
 327 }
 328
 329
 330 void
 331 st_destroy_draw(struct st_context *st)
 332 {
 333    draw_destroy(st->draw);
 334 }
 335
 336 /**
 337  * Getter for the draw_context, so that initialization of it can happen only
 338  * when needed (the TGSI exec machines take up quite a bit of memory).
 339  */
 340 struct draw_context *
 341 st_get_draw_context(struct st_context *st)
 342 {
 343    if (!st->draw) {
 344       st->draw = draw_create(st->pipe);
 345       if (!st->draw) {
 346          _mesa_error(st->ctx, GL_OUT_OF_MEMORY, "feedback fallback allocation");
 347          return NULL;
 348       }
 349    }
 350
 351    /* Disable draw options that might convert points/lines to tris, etc.
 352     * as that would foul-up feedback/selection mode.
 353     */
 354    draw_wide_line_threshold(st->draw, 1000.0f);
 355    draw_wide_point_threshold(st->draw, 1000.0f);
 356    draw_enable_line_stipple(st->draw, FALSE);
 357    draw_enable_point_sprites(st->draw, FALSE);
 358
 359    return st->draw;
 360 }
 361
 362 /**
 363  * Draw a quad with given position, texcoords and color.
 364  */
 365 bool
 366 st_draw_quad(struct st_context *st,
 367              float x0, float y0, float x1, float y1, float z,
 368              float s0, float t0, float s1, float t1,
 369              const float *color,
 370              unsigned num_instances)
 371 {
 372    struct pipe_vertex_buffer vb = {0};
 373    struct st_util_vertex *verts;
 374
 375    vb.stride = sizeof(struct st_util_vertex);
 376
 377    u_upload_alloc(st->pipe->stream_uploader, 0,
 378                   4 * sizeof(struct st_util_vertex), 4,
 379                   &vb.buffer_offset, &vb.buffer.resource, (void **) &verts);
 380    if (!vb.buffer.resource) {
 381       return false;
 382    }
 383
 384    /* lower-left */
 385    verts[0].x = x0;
 386    verts[0].y = y1;
 387    verts[0].z = z;
 388    verts[0].r = color[0];
 389    verts[0].g = color[1];
 390    verts[0].b = color[2];
 391    verts[0].a = color[3];
 392    verts[0].s = s0;
 393    verts[0].t = t0;
 394
 395    /* lower-right */
 396    verts[1].x = x1;
 397    verts[1].y = y1;
 398    verts[1].z = z;
 399    verts[1].r = color[0];
 400    verts[1].g = color[1];
 401    verts[1].b = color[2];
 402    verts[1].a = color[3];
 403    verts[1].s = s1;
 404    verts[1].t = t0;
 405
 406    /* upper-right */
 407    verts[2].x = x1;
 408    verts[2].y = y0;
 409    verts[2].z = z;
 410    verts[2].r = color[0];
 411    verts[2].g = color[1];
 412    verts[2].b = color[2];
 413    verts[2].a = color[3];
 414    verts[2].s = s1;
 415    verts[2].t = t1;
 416
 417    /* upper-left */
 418    verts[3].x = x0;
 419    verts[3].y = y0;
 420    verts[3].z = z;
 421    verts[3].r = color[0];
 422    verts[3].g = color[1];
 423    verts[3].b = color[2];
 424    verts[3].a = color[3];
 425    verts[3].s = s0;
 426    verts[3].t = t1;
 427
 428    u_upload_unmap(st->pipe->stream_uploader);
 429
 430    /* At the time of writing, cso_get_aux_vertex_buffer_slot() always returns
 431     * zero.  If that ever changes we need to audit the calls to that function
 432     * and make sure the slot number is used consistently everywhere.
 433     */
 434    assert(cso_get_aux_vertex_buffer_slot(st->cso_context) == 0);
 435
 436    cso_set_vertex_buffers(st->cso_context,
 437                           cso_get_aux_vertex_buffer_slot(st->cso_context),
 438                           1, &vb);
 439
 440    if (num_instances > 1) {
 441       cso_draw_arrays_instanced(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
 442                                 0, num_instances);
 443    } else {
 444       cso_draw_arrays(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
 445    }
 446
 447    pipe_resource_reference(&vb.buffer.resource, NULL);
 448
 449    return true;
 450 }