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  * Basically, translate Mesa's index buffer information into
  90  * a pipe_index_buffer object.
  91  */
  92 static void
  93 setup_index_buffer(struct st_context *st,
  94                    const struct _mesa_index_buffer *ib)
  95 {
  96    struct pipe_index_buffer ibuffer;
  97    struct gl_buffer_object *bufobj = ib->obj;
  98
  99    ibuffer.index_size = vbo_sizeof_ib_type(ib->type);
 100
 101    /* get/create the index buffer object */
 102    if (_mesa_is_bufferobj(bufobj)) {
 103       /* indices are in a real VBO */
 104       ibuffer.buffer = st_buffer_object(bufobj)->buffer;
 105       ibuffer.offset = pointer_to_offset(ib->ptr);
 106       ibuffer.user_buffer = NULL;
 107    }
 108    else {
 109       /* indices are in user space memory */
 110       ibuffer.buffer = NULL;
 111       ibuffer.offset = 0;
 112       ibuffer.user_buffer = ib->ptr;
 113    }
 114
 115    cso_set_index_buffer(st->cso_context, &ibuffer);
 116 }
 117
 118
 119 /**
 120  * Set the restart index.
 121  */
 122 static void
 123 setup_primitive_restart(struct gl_context *ctx,
 124                         const struct _mesa_index_buffer *ib,
 125                         struct pipe_draw_info *info)
 126 {
 127    if (ctx->Array._PrimitiveRestart) {
 128       info->restart_index = _mesa_primitive_restart_index(ctx, ib->type);
 129
 130       /* Enable primitive restart only when the restart index can have an
 131        * effect. This is required for correctness in radeonsi VI support.
 132        * Other hardware may also benefit from taking a faster, non-restart path
 133        * when possible.
 134        */
 135       if ((ib->type == GL_UNSIGNED_INT) ||
 136           (ib->type == GL_UNSIGNED_SHORT && info->restart_index <= 0xffff) ||
 137           (ib->type == GL_UNSIGNED_BYTE && info->restart_index <= 0xff))
 138          info->primitive_restart = true;
 139    }
 140 }
 141
 142
 143 /**
 144  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 145  * the corresponding Gallium type.
 146  */
 147 static unsigned
 148 translate_prim(const struct gl_context *ctx, unsigned prim)
 149 {
 150    /* GL prims should match Gallium prims, spot-check a few */
 151    STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
 152    STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
 153    STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 154    STATIC_ASSERT(GL_PATCHES == PIPE_PRIM_PATCHES);
 155
 156    return prim;
 157 }
 158
 159
 160 /**
 161  * This function gets plugged into the VBO module and is called when
 162  * we have something to render.
 163  * Basically, translate the information into the format expected by gallium.
 164  */
 165 void
 166 st_draw_vbo(struct gl_context *ctx,
 167             const struct _mesa_prim *prims,
 168             GLuint nr_prims,
 169             const struct _mesa_index_buffer *ib,
 170             GLboolean index_bounds_valid,
 171             GLuint min_index,
 172             GLuint max_index,
 173             struct gl_transform_feedback_object *tfb_vertcount,
 174             unsigned stream,
 175             struct gl_buffer_object *indirect)
 176 {
 177    struct st_context *st = st_context(ctx);
 178    struct pipe_draw_info info;
 179    const struct gl_vertex_array **arrays = ctx->Array._DrawArrays;
 180    unsigned i;
 181
 182    /* Mesa core state should have been validated already */
 183    assert(ctx->NewState == 0x0);
 184
 185    st_flush_bitmap_cache(st);
 186    st_invalidate_readpix_cache(st);
 187
 188    /* Validate state. */
 189    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 190        st->gfx_shaders_may_be_dirty) {
 191       st_validate_state(st, ST_PIPELINE_RENDER);
 192    }
 193
 194    if (st->vertex_array_out_of_memory) {
 195       return;
 196    }
 197
 198    util_draw_init_info(&info);
 199
 200    if (ib) {
 201       /* Get index bounds for user buffers. */
 202       if (!index_bounds_valid)
 203          if (!all_varyings_in_vbos(arrays))
 204             vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
 205                                    nr_prims);
 206
 207       setup_index_buffer(st, ib);
 208
 209       info.indexed = TRUE;
 210       if (min_index != ~0U && max_index != ~0U) {
 211          info.min_index = min_index;
 212          info.max_index = max_index;
 213       }
 214
 215       /* The VBO module handles restart for the non-indexed GLDrawArrays
 216        * so we only set these fields for indexed drawing:
 217        */
 218       setup_primitive_restart(ctx, ib, &info);
 219    }
 220    else {
 221       /* Transform feedback drawing is always non-indexed. */
 222       /* Set info.count_from_stream_output. */
 223       if (tfb_vertcount) {
 224          if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
 225             return;
 226       }
 227    }
 228
 229    assert(!indirect);
 230
 231    /* do actual drawing */
 232    for (i = 0; i < nr_prims; i++) {
 233       info.mode = translate_prim(ctx, prims[i].mode);
 234       info.start = prims[i].start;
 235       info.count = prims[i].count;
 236       info.start_instance = prims[i].base_instance;
 237       info.instance_count = prims[i].num_instances;
 238       info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 239       info.index_bias = prims[i].basevertex;
 240       info.drawid = prims[i].draw_id;
 241       if (!ib) {
 242          info.min_index = info.start;
 243          info.max_index = info.start + info.count - 1;
 244       }
 245
 246       if (ST_DEBUG & DEBUG_DRAW) {
 247          debug_printf("st/draw: mode %s  start %u  count %u  indexed %d\n",
 248                       u_prim_name(info.mode),
 249                       info.start,
 250                       info.count,
 251                       info.indexed);
 252       }
 253
 254       /* Don't call u_trim_pipe_prim. Drivers should do it if they need it. */
 255       cso_draw_vbo(st->cso_context, &info);
 256    }
 257 }
 258
 259 static void
 260 st_indirect_draw_vbo(struct gl_context *ctx,
 261                      GLuint mode,
 262                      struct gl_buffer_object *indirect_data,
 263                      GLsizeiptr indirect_offset,
 264                      unsigned draw_count,
 265                      unsigned stride,
 266                      struct gl_buffer_object *indirect_params,
 267                      GLsizeiptr indirect_params_offset,
 268                      const struct _mesa_index_buffer *ib)
 269 {
 270    struct st_context *st = st_context(ctx);
 271    struct pipe_draw_info info;
 272
 273    /* Mesa core state should have been validated already */
 274    assert(ctx->NewState == 0x0);
 275    assert(stride);
 276
 277    /* Validate state. */
 278    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 279        st->gfx_shaders_may_be_dirty) {
 280       st_validate_state(st, ST_PIPELINE_RENDER);
 281    }
 282
 283    if (st->vertex_array_out_of_memory) {
 284       return;
 285    }
 286
 287    util_draw_init_info(&info);
 288
 289    if (ib) {
 290       setup_index_buffer(st, ib);
 291
 292       info.indexed = TRUE;
 293
 294       /* Primitive restart is not handled by the VBO module in this case. */
 295       setup_primitive_restart(ctx, ib, &info);
 296    }
 297
 298    info.mode = translate_prim(ctx, mode);
 299    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 300    info.indirect = st_buffer_object(indirect_data)->buffer;
 301    info.indirect_offset = indirect_offset;
 302
 303    if (ST_DEBUG & DEBUG_DRAW) {
 304       debug_printf("st/draw indirect: mode %s drawcount %d indexed %d\n",
 305                    u_prim_name(info.mode),
 306                    draw_count,
 307                    info.indexed);
 308    }
 309
 310    if (!st->has_multi_draw_indirect) {
 311       int i;
 312
 313       assert(!indirect_params);
 314       info.indirect_count = 1;
 315       for (i = 0; i < draw_count; i++) {
 316          info.drawid = i;
 317          cso_draw_vbo(st->cso_context, &info);
 318          info.indirect_offset += stride;
 319       }
 320    } else {
 321       info.indirect_count = draw_count;
 322       info.indirect_stride = stride;
 323       if (indirect_params) {
 324          info.indirect_params = st_buffer_object(indirect_params)->buffer;
 325          info.indirect_params_offset = indirect_params_offset;
 326       }
 327       cso_draw_vbo(st->cso_context, &info);
 328    }
 329 }
 330
 331
 332 void
 333 st_init_draw(struct st_context *st)
 334 {
 335    struct gl_context *ctx = st->ctx;
 336
 337    vbo_set_draw_func(ctx, st_draw_vbo);
 338    vbo_set_indirect_draw_func(ctx, st_indirect_draw_vbo);
 339 }
 340
 341
 342 void
 343 st_destroy_draw(struct st_context *st)
 344 {
 345    draw_destroy(st->draw);
 346 }
 347
 348 /**
 349  * Getter for the draw_context, so that initialization of it can happen only
 350  * when needed (the TGSI exec machines take up quite a bit of memory).
 351  */
 352 struct draw_context *
 353 st_get_draw_context(struct st_context *st)
 354 {
 355    if (!st->draw) {
 356       st->draw = draw_create(st->pipe);
 357       if (!st->draw) {
 358          _mesa_error(st->ctx, GL_OUT_OF_MEMORY, "feedback fallback allocation");
 359          return NULL;
 360       }
 361    }
 362
 363    /* Disable draw options that might convert points/lines to tris, etc.
 364     * as that would foul-up feedback/selection mode.
 365     */
 366    draw_wide_line_threshold(st->draw, 1000.0f);
 367    draw_wide_point_threshold(st->draw, 1000.0f);
 368    draw_enable_line_stipple(st->draw, FALSE);
 369    draw_enable_point_sprites(st->draw, FALSE);
 370
 371    return st->draw;
 372 }
 373
 374 /**
 375  * Draw a quad with given position, texcoords and color.
 376  */
 377 bool
 378 st_draw_quad(struct st_context *st,
 379              float x0, float y0, float x1, float y1, float z,
 380              float s0, float t0, float s1, float t1,
 381              const float *color,
 382              unsigned num_instances)
 383 {
 384    struct pipe_vertex_buffer vb = {0};
 385    struct st_util_vertex *verts;
 386
 387    vb.stride = sizeof(struct st_util_vertex);
 388
 389    u_upload_alloc(st->pipe->stream_uploader, 0,
 390                   4 * sizeof(struct st_util_vertex), 4,
 391                   &vb.buffer_offset, &vb.buffer, (void **) &verts);
 392    if (!vb.buffer) {
 393       return false;
 394    }
 395
 396    /* lower-left */
 397    verts[0].x = x0;
 398    verts[0].y = y1;
 399    verts[0].z = z;
 400    verts[0].r = color[0];
 401    verts[0].g = color[1];
 402    verts[0].b = color[2];
 403    verts[0].a = color[3];
 404    verts[0].s = s0;
 405    verts[0].t = t0;
 406
 407    /* lower-right */
 408    verts[1].x = x1;
 409    verts[1].y = y1;
 410    verts[1].z = z;
 411    verts[1].r = color[0];
 412    verts[1].g = color[1];
 413    verts[1].b = color[2];
 414    verts[1].a = color[3];
 415    verts[1].s = s1;
 416    verts[1].t = t0;
 417
 418    /* upper-right */
 419    verts[2].x = x1;
 420    verts[2].y = y0;
 421    verts[2].z = z;
 422    verts[2].r = color[0];
 423    verts[2].g = color[1];
 424    verts[2].b = color[2];
 425    verts[2].a = color[3];
 426    verts[2].s = s1;
 427    verts[2].t = t1;
 428
 429    /* upper-left */
 430    verts[3].x = x0;
 431    verts[3].y = y0;
 432    verts[3].z = z;
 433    verts[3].r = color[0];
 434    verts[3].g = color[1];
 435    verts[3].b = color[2];
 436    verts[3].a = color[3];
 437    verts[3].s = s0;
 438    verts[3].t = t1;
 439
 440    u_upload_unmap(st->pipe->stream_uploader);
 441
 442    /* At the time of writing, cso_get_aux_vertex_buffer_slot() always returns
 443     * zero.  If that ever changes we need to audit the calls to that function
 444     * and make sure the slot number is used consistently everywhere.
 445     */
 446    assert(cso_get_aux_vertex_buffer_slot(st->cso_context) == 0);
 447
 448    cso_set_vertex_buffers(st->cso_context,
 449                           cso_get_aux_vertex_buffer_slot(st->cso_context),
 450                           1, &vb);
 451
 452    if (num_instances > 1) {
 453       cso_draw_arrays_instanced(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
 454                                 0, num_instances);
 455    } else {
 456       cso_draw_arrays(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
 457    }
 458
 459    pipe_resource_reference(&vb.buffer, NULL);
 460
 461    return true;
 462 }