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