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    util_draw_init_info(&info);
 170
 171    if (ib) {
 172       struct gl_buffer_object *bufobj = ib->obj;
 173
 174       /* Get index bounds for user buffers. */
 175       if (!index_bounds_valid)
 176          if (!all_varyings_in_vbos(arrays))
 177             vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
 178                                    nr_prims);
 179
 180       info.index_size = ib->index_size;
 181       info.min_index = min_index;
 182       info.max_index = max_index;
 183
 184       if (_mesa_is_bufferobj(bufobj)) {
 185          /* indices are in a real VBO */
 186          info.index.resource = st_buffer_object(bufobj)->buffer;
 187          start = pointer_to_offset(ib->ptr) / info.index_size;
 188       } else {
 189          /* indices are in user space memory */
 190          info.has_user_indices = true;
 191          info.index.user = ib->ptr;
 192       }
 193
 194       setup_primitive_restart(ctx, &info);
 195    }
 196    else {
 197       /* Transform feedback drawing is always non-indexed. */
 198       /* Set info.count_from_stream_output. */
 199       if (tfb_vertcount) {
 200          if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
 201             return;
 202       }
 203    }
 204
 205    assert(!indirect);
 206
 207    /* do actual drawing */
 208    for (i = 0; i < nr_prims; i++) {
 209       info.mode = translate_prim(ctx, prims[i].mode);
 210       info.start = start + prims[i].start;
 211       info.count = prims[i].count;
 212       info.start_instance = prims[i].base_instance;
 213       info.instance_count = prims[i].num_instances;
 214       info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 215       info.index_bias = prims[i].basevertex;
 216       info.drawid = prims[i].draw_id;
 217       if (!ib) {
 218          info.min_index = info.start;
 219          info.max_index = info.start + info.count - 1;
 220       }
 221
 222       if (ST_DEBUG & DEBUG_DRAW) {
 223          debug_printf("st/draw: mode %s  start %u  count %u  index_size %d\n",
 224                       u_prim_name(info.mode),
 225                       info.start,
 226                       info.count,
 227                       info.index_size);
 228       }
 229
 230       /* Don't call u_trim_pipe_prim. Drivers should do it if they need it. */
 231       cso_draw_vbo(st->cso_context, &info);
 232    }
 233 }
 234
 235 static void
 236 st_indirect_draw_vbo(struct gl_context *ctx,
 237                      GLuint mode,
 238                      struct gl_buffer_object *indirect_data,
 239                      GLsizeiptr indirect_offset,
 240                      unsigned draw_count,
 241                      unsigned stride,
 242                      struct gl_buffer_object *indirect_params,
 243                      GLsizeiptr indirect_params_offset,
 244                      const struct _mesa_index_buffer *ib)
 245 {
 246    struct st_context *st = st_context(ctx);
 247    struct pipe_draw_info info;
 248    struct pipe_draw_indirect_info indirect;
 249
 250    /* Mesa core state should have been validated already */
 251    assert(ctx->NewState == 0x0);
 252    assert(stride);
 253
 254    st_invalidate_readpix_cache(st);
 255
 256    /* Validate state. */
 257    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 258        st->gfx_shaders_may_be_dirty) {
 259       st_validate_state(st, ST_PIPELINE_RENDER);
 260    }
 261
 262    if (st->vertex_array_out_of_memory) {
 263       return;
 264    }
 265
 266    memset(&indirect, 0, sizeof(indirect));
 267    util_draw_init_info(&info);
 268    info.start = 0; /* index offset / index size */
 269
 270    if (ib) {
 271       struct gl_buffer_object *bufobj = ib->obj;
 272
 273       /* indices are always in a real VBO */
 274       assert(_mesa_is_bufferobj(bufobj));
 275
 276       info.index_size = ib->index_size;
 277       info.index.resource = st_buffer_object(bufobj)->buffer;
 278       info.start = pointer_to_offset(ib->ptr) / info.index_size;
 279
 280       /* Primitive restart is not handled by the VBO module in this case. */
 281       setup_primitive_restart(ctx, &info);
 282    }
 283
 284    info.mode = translate_prim(ctx, mode);
 285    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 286    info.indirect = &indirect;
 287    indirect.buffer = st_buffer_object(indirect_data)->buffer;
 288    indirect.offset = indirect_offset;
 289
 290    if (ST_DEBUG & DEBUG_DRAW) {
 291       debug_printf("st/draw indirect: mode %s drawcount %d index_size %d\n",
 292                    u_prim_name(info.mode),
 293                    draw_count,
 294                    info.index_size);
 295    }
 296
 297    if (!st->has_multi_draw_indirect) {
 298       int i;
 299
 300       assert(!indirect_params);
 301       indirect.draw_count = 1;
 302       for (i = 0; i < draw_count; i++) {
 303          info.drawid = i;
 304          cso_draw_vbo(st->cso_context, &info);
 305          indirect.offset += stride;
 306       }
 307    } else {
 308       indirect.draw_count = draw_count;
 309       indirect.stride = stride;
 310       if (indirect_params) {
 311          indirect.indirect_draw_count = st_buffer_object(indirect_params)->buffer;
 312          indirect.indirect_draw_count_offset = indirect_params_offset;
 313       }
 314       cso_draw_vbo(st->cso_context, &info);
 315    }
 316 }
 317
 318
 319 void
 320 st_init_draw(struct st_context *st)
 321 {
 322    struct gl_context *ctx = st->ctx;
 323
 324    vbo_set_draw_func(ctx, st_draw_vbo);
 325    vbo_set_indirect_draw_func(ctx, st_indirect_draw_vbo);
 326 }
 327
 328
 329 void
 330 st_destroy_draw(struct st_context *st)
 331 {
 332    draw_destroy(st->draw);
 333 }
 334
 335 /**
 336  * Getter for the draw_context, so that initialization of it can happen only
 337  * when needed (the TGSI exec machines take up quite a bit of memory).
 338  */
 339 struct draw_context *
 340 st_get_draw_context(struct st_context *st)
 341 {
 342    if (!st->draw) {
 343       st->draw = draw_create(st->pipe);
 344       if (!st->draw) {
 345          _mesa_error(st->ctx, GL_OUT_OF_MEMORY, "feedback fallback allocation");
 346          return NULL;
 347       }
 348    }
 349
 350    /* Disable draw options that might convert points/lines to tris, etc.
 351     * as that would foul-up feedback/selection mode.
 352     */
 353    draw_wide_line_threshold(st->draw, 1000.0f);
 354    draw_wide_point_threshold(st->draw, 1000.0f);
 355    draw_enable_line_stipple(st->draw, FALSE);
 356    draw_enable_point_sprites(st->draw, FALSE);
 357
 358    return st->draw;
 359 }
 360
 361 /**
 362  * Draw a quad with given position, texcoords and color.
 363  */
 364 bool
 365 st_draw_quad(struct st_context *st,
 366              float x0, float y0, float x1, float y1, float z,
 367              float s0, float t0, float s1, float t1,
 368              const float *color,
 369              unsigned num_instances)
 370 {
 371    struct pipe_vertex_buffer vb = {0};
 372    struct st_util_vertex *verts;
 373
 374    vb.stride = sizeof(struct st_util_vertex);
 375
 376    u_upload_alloc(st->pipe->stream_uploader, 0,
 377                   4 * sizeof(struct st_util_vertex), 4,
 378                   &vb.buffer_offset, &vb.buffer.resource, (void **) &verts);
 379    if (!vb.buffer.resource) {
 380       return false;
 381    }
 382
 383    /* lower-left */
 384    verts[0].x = x0;
 385    verts[0].y = y1;
 386    verts[0].z = z;
 387    verts[0].r = color[0];
 388    verts[0].g = color[1];
 389    verts[0].b = color[2];
 390    verts[0].a = color[3];
 391    verts[0].s = s0;
 392    verts[0].t = t0;
 393
 394    /* lower-right */
 395    verts[1].x = x1;
 396    verts[1].y = y1;
 397    verts[1].z = z;
 398    verts[1].r = color[0];
 399    verts[1].g = color[1];
 400    verts[1].b = color[2];
 401    verts[1].a = color[3];
 402    verts[1].s = s1;
 403    verts[1].t = t0;
 404
 405    /* upper-right */
 406    verts[2].x = x1;
 407    verts[2].y = y0;
 408    verts[2].z = z;
 409    verts[2].r = color[0];
 410    verts[2].g = color[1];
 411    verts[2].b = color[2];
 412    verts[2].a = color[3];
 413    verts[2].s = s1;
 414    verts[2].t = t1;
 415
 416    /* upper-left */
 417    verts[3].x = x0;
 418    verts[3].y = y0;
 419    verts[3].z = z;
 420    verts[3].r = color[0];
 421    verts[3].g = color[1];
 422    verts[3].b = color[2];
 423    verts[3].a = color[3];
 424    verts[3].s = s0;
 425    verts[3].t = t1;
 426
 427    u_upload_unmap(st->pipe->stream_uploader);
 428
 429    /* At the time of writing, cso_get_aux_vertex_buffer_slot() always returns
 430     * zero.  If that ever changes we need to audit the calls to that function
 431     * and make sure the slot number is used consistently everywhere.
 432     */
 433    assert(cso_get_aux_vertex_buffer_slot(st->cso_context) == 0);
 434
 435    cso_set_vertex_buffers(st->cso_context,
 436                           cso_get_aux_vertex_buffer_slot(st->cso_context),
 437                           1, &vb);
 438
 439    if (num_instances > 1) {
 440       cso_draw_arrays_instanced(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
 441                                 0, num_instances);
 442    } else {
 443       cso_draw_arrays(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
 444    }
 445
 446    pipe_resource_reference(&vb.buffer.resource, NULL);
 447
 448    return true;
 449 }