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_vertex_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  * Set the restart index.
  90  */
  91 static void
  92 setup_primitive_restart(struct gl_context *ctx, struct pipe_draw_info *info)
  93 {
  94    if (ctx->Array._PrimitiveRestart) {
  95       unsigned index_size = info->index_size;
  96
  97       info->restart_index =
  98          _mesa_primitive_restart_index(ctx, index_size);
  99
 100       /* Enable primitive restart only when the restart index can have an
 101        * effect. This is required for correctness in radeonsi VI support.
 102        * Other hardware may also benefit from taking a faster, non-restart path
 103        * when possible.
 104        */
 105       if (index_size == 4 || info->restart_index < (1 << (index_size * 8)))
 106          info->primitive_restart = true;
 107    }
 108 }
 109
 110
 111 /**
 112  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 113  * the corresponding Gallium type.
 114  */
 115 static unsigned
 116 translate_prim(const struct gl_context *ctx, unsigned prim)
 117 {
 118    /* GL prims should match Gallium prims, spot-check a few */
 119    STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
 120    STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
 121    STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 122    STATIC_ASSERT(GL_PATCHES == PIPE_PRIM_PATCHES);
 123
 124    return prim;
 125 }
 126
 127
 128 /**
 129  * This function gets plugged into the VBO module and is called when
 130  * we have something to render.
 131  * Basically, translate the information into the format expected by gallium.
 132  */
 133 void
 134 st_draw_vbo(struct gl_context *ctx,
 135             const struct _mesa_prim *prims,
 136             GLuint nr_prims,
 137             const struct _mesa_index_buffer *ib,
 138             GLboolean index_bounds_valid,
 139             GLuint min_index,
 140             GLuint max_index,
 141             struct gl_transform_feedback_object *tfb_vertcount,
 142             unsigned stream,
 143             struct gl_buffer_object *indirect)
 144 {
 145    struct st_context *st = st_context(ctx);
 146    struct pipe_draw_info info;
 147    const struct gl_vertex_array **arrays = ctx->Array._DrawArrays;
 148    unsigned i;
 149    unsigned start = 0;
 150
 151    /* Mesa core state should have been validated already */
 152    assert(ctx->NewState == 0x0);
 153
 154    if (unlikely(!st->bitmap.cache.empty))
 155       st_flush_bitmap_cache(st);
 156
 157    st_invalidate_readpix_cache(st);
 158
 159    /* Validate state. */
 160    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 161        st->gfx_shaders_may_be_dirty) {
 162       st_validate_state(st, ST_PIPELINE_RENDER);
 163    }
 164
 165    if (st->vertex_array_out_of_memory) {
 166       return;
 167    }
 168
 169    /* Initialize pipe_draw_info. */
 170    info.primitive_restart = false;
 171    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 172    info.indirect = NULL;
 173    info.count_from_stream_output = NULL;
 174
 175    if (ib) {
 176       struct gl_buffer_object *bufobj = ib->obj;
 177
 178       /* Get index bounds for user buffers. */
 179       if (!index_bounds_valid)
 180          if (!all_varyings_in_vbos(arrays))
 181             vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
 182                                    nr_prims);
 183
 184       info.index_size = ib->index_size;
 185       info.min_index = min_index;
 186       info.max_index = max_index;
 187
 188       if (_mesa_is_bufferobj(bufobj)) {
 189          /* indices are in a real VBO */
 190          info.has_user_indices = false;
 191          info.index.resource = st_buffer_object(bufobj)->buffer;
 192          start = pointer_to_offset(ib->ptr) / info.index_size;
 193       } else {
 194          /* indices are in user space memory */
 195          info.has_user_indices = true;
 196          info.index.user = ib->ptr;
 197       }
 198
 199       setup_primitive_restart(ctx, &info);
 200    }
 201    else {
 202       info.index_size = 0;
 203
 204       /* Transform feedback drawing is always non-indexed. */
 205       /* Set info.count_from_stream_output. */
 206       if (tfb_vertcount) {
 207          if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
 208             return;
 209       }
 210    }
 211
 212    assert(!indirect);
 213
 214    /* do actual drawing */
 215    for (i = 0; i < nr_prims; i++) {
 216       info.mode = translate_prim(ctx, prims[i].mode);
 217       info.start = start + prims[i].start;
 218       info.count = prims[i].count;
 219       info.start_instance = prims[i].base_instance;
 220       info.instance_count = prims[i].num_instances;
 221       info.index_bias = prims[i].basevertex;
 222       info.drawid = prims[i].draw_id;
 223       if (!ib) {
 224          info.min_index = info.start;
 225          info.max_index = info.start + info.count - 1;
 226       }
 227
 228       if (ST_DEBUG & DEBUG_DRAW) {
 229          debug_printf("st/draw: mode %s  start %u  count %u  index_size %d\n",
 230                       u_prim_name(info.mode),
 231                       info.start,
 232                       info.count,
 233                       info.index_size);
 234       }
 235
 236       /* Don't call u_trim_pipe_prim. Drivers should do it if they need it. */
 237       cso_draw_vbo(st->cso_context, &info);
 238    }
 239 }
 240
 241 static void
 242 st_indirect_draw_vbo(struct gl_context *ctx,
 243                      GLuint mode,
 244                      struct gl_buffer_object *indirect_data,
 245                      GLsizeiptr indirect_offset,
 246                      unsigned draw_count,
 247                      unsigned stride,
 248                      struct gl_buffer_object *indirect_params,
 249                      GLsizeiptr indirect_params_offset,
 250                      const struct _mesa_index_buffer *ib)
 251 {
 252    struct st_context *st = st_context(ctx);
 253    struct pipe_draw_info info;
 254    struct pipe_draw_indirect_info indirect;
 255
 256    /* Mesa core state should have been validated already */
 257    assert(ctx->NewState == 0x0);
 258    assert(stride);
 259
 260    st_invalidate_readpix_cache(st);
 261
 262    /* Validate state. */
 263    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 264        st->gfx_shaders_may_be_dirty) {
 265       st_validate_state(st, ST_PIPELINE_RENDER);
 266    }
 267
 268    if (st->vertex_array_out_of_memory) {
 269       return;
 270    }
 271
 272    memset(&indirect, 0, sizeof(indirect));
 273    util_draw_init_info(&info);
 274    info.start = 0; /* index offset / index size */
 275
 276    if (ib) {
 277       struct gl_buffer_object *bufobj = ib->obj;
 278
 279       /* indices are always in a real VBO */
 280       assert(_mesa_is_bufferobj(bufobj));
 281
 282       info.index_size = ib->index_size;
 283       info.index.resource = st_buffer_object(bufobj)->buffer;
 284       info.start = pointer_to_offset(ib->ptr) / info.index_size;
 285
 286       /* Primitive restart is not handled by the VBO module in this case. */
 287       setup_primitive_restart(ctx, &info);
 288    }
 289
 290    info.mode = translate_prim(ctx, mode);
 291    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 292    info.indirect = &indirect;
 293    indirect.buffer = st_buffer_object(indirect_data)->buffer;
 294    indirect.offset = indirect_offset;
 295
 296    if (ST_DEBUG & DEBUG_DRAW) {
 297       debug_printf("st/draw indirect: mode %s drawcount %d index_size %d\n",
 298                    u_prim_name(info.mode),
 299                    draw_count,
 300                    info.index_size);
 301    }
 302
 303    if (!st->has_multi_draw_indirect) {
 304       int i;
 305
 306       assert(!indirect_params);
 307       indirect.draw_count = 1;
 308       for (i = 0; i < draw_count; i++) {
 309          info.drawid = i;
 310          cso_draw_vbo(st->cso_context, &info);
 311          indirect.offset += stride;
 312       }
 313    } else {
 314       indirect.draw_count = draw_count;
 315       indirect.stride = stride;
 316       if (indirect_params) {
 317          indirect.indirect_draw_count = st_buffer_object(indirect_params)->buffer;
 318          indirect.indirect_draw_count_offset = indirect_params_offset;
 319       }
 320       cso_draw_vbo(st->cso_context, &info);
 321    }
 322 }
 323
 324
 325 void
 326 st_init_draw(struct st_context *st)
 327 {
 328    struct gl_context *ctx = st->ctx;
 329
 330    vbo_set_draw_func(ctx, st_draw_vbo);
 331    vbo_set_indirect_draw_func(ctx, st_indirect_draw_vbo);
 332 }
 333
 334
 335 void
 336 st_destroy_draw(struct st_context *st)
 337 {
 338    draw_destroy(st->draw);
 339 }
 340
 341 /**
 342  * Getter for the draw_context, so that initialization of it can happen only
 343  * when needed (the TGSI exec machines take up quite a bit of memory).
 344  */
 345 struct draw_context *
 346 st_get_draw_context(struct st_context *st)
 347 {
 348    if (!st->draw) {
 349       st->draw = draw_create(st->pipe);
 350       if (!st->draw) {
 351          _mesa_error(st->ctx, GL_OUT_OF_MEMORY, "feedback fallback allocation");
 352          return NULL;
 353       }
 354    }
 355
 356    /* Disable draw options that might convert points/lines to tris, etc.
 357     * as that would foul-up feedback/selection mode.
 358     */
 359    draw_wide_line_threshold(st->draw, 1000.0f);
 360    draw_wide_point_threshold(st->draw, 1000.0f);
 361    draw_enable_line_stipple(st->draw, FALSE);
 362    draw_enable_point_sprites(st->draw, FALSE);
 363
 364    return st->draw;
 365 }
 366
 367 /**
 368  * Draw a quad with given position, texcoords and color.
 369  */
 370 bool
 371 st_draw_quad(struct st_context *st,
 372              float x0, float y0, float x1, float y1, float z,
 373              float s0, float t0, float s1, float t1,
 374              const float *color,
 375              unsigned num_instances)
 376 {
 377    struct pipe_vertex_buffer vb = {0};
 378    struct st_util_vertex *verts;
 379
 380    vb.stride = sizeof(struct st_util_vertex);
 381
 382    u_upload_alloc(st->pipe->stream_uploader, 0,
 383                   4 * sizeof(struct st_util_vertex), 4,
 384                   &vb.buffer_offset, &vb.buffer.resource, (void **) &verts);
 385    if (!vb.buffer.resource) {
 386       return false;
 387    }
 388
 389    /* lower-left */
 390    verts[0].x = x0;
 391    verts[0].y = y1;
 392    verts[0].z = z;
 393    verts[0].r = color[0];
 394    verts[0].g = color[1];
 395    verts[0].b = color[2];
 396    verts[0].a = color[3];
 397    verts[0].s = s0;
 398    verts[0].t = t0;
 399
 400    /* lower-right */
 401    verts[1].x = x1;
 402    verts[1].y = y1;
 403    verts[1].z = z;
 404    verts[1].r = color[0];
 405    verts[1].g = color[1];
 406    verts[1].b = color[2];
 407    verts[1].a = color[3];
 408    verts[1].s = s1;
 409    verts[1].t = t0;
 410
 411    /* upper-right */
 412    verts[2].x = x1;
 413    verts[2].y = y0;
 414    verts[2].z = z;
 415    verts[2].r = color[0];
 416    verts[2].g = color[1];
 417    verts[2].b = color[2];
 418    verts[2].a = color[3];
 419    verts[2].s = s1;
 420    verts[2].t = t1;
 421
 422    /* upper-left */
 423    verts[3].x = x0;
 424    verts[3].y = y0;
 425    verts[3].z = z;
 426    verts[3].r = color[0];
 427    verts[3].g = color[1];
 428    verts[3].b = color[2];
 429    verts[3].a = color[3];
 430    verts[3].s = s0;
 431    verts[3].t = t1;
 432
 433    u_upload_unmap(st->pipe->stream_uploader);
 434
 435    /* At the time of writing, cso_get_aux_vertex_buffer_slot() always returns
 436     * zero.  If that ever changes we need to audit the calls to that function
 437     * and make sure the slot number is used consistently everywhere.
 438     */
 439    assert(cso_get_aux_vertex_buffer_slot(st->cso_context) == 0);
 440
 441    cso_set_vertex_buffers(st->cso_context,
 442                           cso_get_aux_vertex_buffer_slot(st->cso_context),
 443                           1, &vb);
 444
 445    if (num_instances > 1) {
 446       cso_draw_arrays_instanced(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
 447                                 0, num_instances);
 448    } else {
 449       cso_draw_arrays(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
 450    }
 451
 452    pipe_resource_reference(&vb.buffer.resource, NULL);
 453
 454    return true;
 455 }