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