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_quad.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  * Prior to drawing, check that any uniforms referenced by the
 131  * current shader have been set.  If a uniform has not been set,
 132  * issue a warning.
 133  */
 134 static void
 135 check_uniforms(struct gl_context *ctx)
 136 {
 137    struct gl_shader_program **shProg = ctx->_Shader->CurrentProgram;
 138    unsigned j;
 139
 140    for (j = 0; j < 3; j++) {
 141       unsigned i;
 142
 143       if (shProg[j] == NULL || !shProg[j]->LinkStatus)
 144          continue;
 145
 146       for (i = 0; i < shProg[j]->NumUniformStorage; i++) {
 147          const struct gl_uniform_storage *u = &shProg[j]->UniformStorage[i];
 148          if (!u->initialized) {
 149             _mesa_warning(ctx,
 150                           "Using shader with uninitialized uniform: %s",
 151                           u->name);
 152          }
 153       }
 154    }
 155 }
 156
 157
 158 /**
 159  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 160  * the corresponding Gallium type.
 161  */
 162 static unsigned
 163 translate_prim(const struct gl_context *ctx, unsigned prim)
 164 {
 165    /* GL prims should match Gallium prims, spot-check a few */
 166    STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
 167    STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
 168    STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 169    STATIC_ASSERT(GL_PATCHES == PIPE_PRIM_PATCHES);
 170
 171    return prim;
 172 }
 173
 174
 175 /**
 176  * This function gets plugged into the VBO module and is called when
 177  * we have something to render.
 178  * Basically, translate the information into the format expected by gallium.
 179  */
 180 void
 181 st_draw_vbo(struct gl_context *ctx,
 182             const struct _mesa_prim *prims,
 183             GLuint nr_prims,
 184             const struct _mesa_index_buffer *ib,
 185             GLboolean index_bounds_valid,
 186             GLuint min_index,
 187             GLuint max_index,
 188             struct gl_transform_feedback_object *tfb_vertcount,
 189             unsigned stream,
 190             struct gl_buffer_object *indirect)
 191 {
 192    struct st_context *st = st_context(ctx);
 193    struct pipe_index_buffer ibuffer = {0};
 194    struct pipe_draw_info info;
 195    const struct gl_client_array **arrays = ctx->Array._DrawArrays;
 196    unsigned i;
 197
 198    /* Mesa core state should have been validated already */
 199    assert(ctx->NewState == 0x0);
 200
 201    st_flush_bitmap_cache(st);
 202
 203    /* Validate state. */
 204    if (st->dirty.st || ctx->NewDriverState) {
 205       st_validate_state(st);
 206
 207 #if 0
 208       if (MESA_VERBOSE & VERBOSE_GLSL) {
 209          check_uniforms(ctx);
 210       }
 211 #else
 212       (void) check_uniforms;
 213 #endif
 214    }
 215
 216    if (st->vertex_array_out_of_memory) {
 217       return;
 218    }
 219
 220    util_draw_init_info(&info);
 221
 222    if (ib) {
 223       /* Get index bounds for user buffers. */
 224       if (!index_bounds_valid)
 225          if (!all_varyings_in_vbos(arrays))
 226             vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
 227                                    nr_prims);
 228
 229       if (!setup_index_buffer(st, ib, &ibuffer)) {
 230          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBegin/DrawElements/DrawArray");
 231          return;
 232       }
 233
 234       info.indexed = TRUE;
 235       if (min_index != ~0U && max_index != ~0U) {
 236          info.min_index = min_index;
 237          info.max_index = max_index;
 238       }
 239
 240       /* The VBO module handles restart for the non-indexed GLDrawArrays
 241        * so we only set these fields for indexed drawing:
 242        */
 243       info.primitive_restart = ctx->Array._PrimitiveRestart;
 244       info.restart_index = _mesa_primitive_restart_index(ctx, ib->type);
 245    }
 246    else {
 247       /* Transform feedback drawing is always non-indexed. */
 248       /* Set info.count_from_stream_output. */
 249       if (tfb_vertcount) {
 250          if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
 251             return;
 252       }
 253    }
 254
 255    assert(!indirect);
 256
 257    /* do actual drawing */
 258    for (i = 0; i < nr_prims; i++) {
 259       info.mode = translate_prim(ctx, prims[i].mode);
 260       info.start = prims[i].start;
 261       info.count = prims[i].count;
 262       info.start_instance = prims[i].base_instance;
 263       info.instance_count = prims[i].num_instances;
 264       info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 265       info.index_bias = prims[i].basevertex;
 266       info.drawid = prims[i].draw_id;
 267       if (!ib) {
 268          info.min_index = info.start;
 269          info.max_index = info.start + info.count - 1;
 270       }
 271
 272       if (ST_DEBUG & DEBUG_DRAW) {
 273          debug_printf("st/draw: mode %s  start %u  count %u  indexed %d\n",
 274                       u_prim_name(info.mode),
 275                       info.start,
 276                       info.count,
 277                       info.indexed);
 278       }
 279
 280       if (info.count_from_stream_output) {
 281          cso_draw_vbo(st->cso_context, &info);
 282       }
 283       else if (info.primitive_restart) {
 284          /* don't trim, restarts might be inside index list */
 285          cso_draw_vbo(st->cso_context, &info);
 286       }
 287       else if (u_trim_pipe_prim(prims[i].mode, &info.count)) {
 288          cso_draw_vbo(st->cso_context, &info);
 289       }
 290    }
 291
 292    if (ib && st->indexbuf_uploader && !_mesa_is_bufferobj(ib->obj)) {
 293       pipe_resource_reference(&ibuffer.buffer, NULL);
 294    }
 295 }
 296
 297 static void
 298 st_indirect_draw_vbo(struct gl_context *ctx,
 299                      GLuint mode,
 300                      struct gl_buffer_object *indirect_data,
 301                      GLsizeiptr indirect_offset,
 302                      unsigned draw_count,
 303                      unsigned stride,
 304                      struct gl_buffer_object *indirect_params,
 305                      GLsizeiptr indirect_params_offset,
 306                      const struct _mesa_index_buffer *ib)
 307 {
 308    struct st_context *st = st_context(ctx);
 309    struct pipe_index_buffer ibuffer = {0};
 310    struct pipe_draw_info info;
 311
 312    /* Mesa core state should have been validated already */
 313    assert(ctx->NewState == 0x0);
 314    assert(stride);
 315
 316    /* Validate state. */
 317    if (st->dirty.st || ctx->NewDriverState) {
 318       st_validate_state(st);
 319    }
 320
 321    if (st->vertex_array_out_of_memory) {
 322       return;
 323    }
 324
 325    util_draw_init_info(&info);
 326
 327    if (ib) {
 328       if (!setup_index_buffer(st, ib, &ibuffer)) {
 329          _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDrawElementsIndirect%s",
 330                      (draw_count > 1) ? "Multi" : "",
 331                      indirect_params ? "CountARB" : "");
 332          return;
 333       }
 334
 335       info.indexed = TRUE;
 336    }
 337
 338    info.mode = translate_prim(ctx, mode);
 339    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 340    info.indirect = st_buffer_object(indirect_data)->buffer;
 341    info.indirect_offset = indirect_offset;
 342
 343    /* Primitive restart is not handled by the VBO module in this case. */
 344    info.primitive_restart = ctx->Array._PrimitiveRestart;
 345    info.restart_index = ctx->Array.RestartIndex;
 346
 347    if (ST_DEBUG & DEBUG_DRAW) {
 348       debug_printf("st/draw indirect: mode %s drawcount %d indexed %d\n",
 349                    u_prim_name(info.mode),
 350                    draw_count,
 351                    info.indexed);
 352    }
 353
 354    if (!st->has_multi_draw_indirect) {
 355       int i;
 356
 357       assert(!indirect_params);
 358       info.indirect_count = 1;
 359       for (i = 0; i < draw_count; i++) {
 360          info.drawid = i;
 361          cso_draw_vbo(st->cso_context, &info);
 362          info.indirect_offset += stride;
 363       }
 364    } else {
 365       info.indirect_count = draw_count;
 366       info.indirect_stride = stride;
 367       if (indirect_params) {
 368          info.indirect_params = st_buffer_object(indirect_params)->buffer;
 369          info.indirect_params_offset = indirect_params_offset;
 370       }
 371       cso_draw_vbo(st->cso_context, &info);
 372    }
 373 }
 374
 375
 376 void
 377 st_init_draw(struct st_context *st)
 378 {
 379    struct gl_context *ctx = st->ctx;
 380
 381    vbo_set_draw_func(ctx, st_draw_vbo);
 382    vbo_set_indirect_draw_func(ctx, st_indirect_draw_vbo);
 383
 384    st->draw = draw_create(st->pipe); /* for selection/feedback */
 385
 386    /* Disable draw options that might convert points/lines to tris, etc.
 387     * as that would foul-up feedback/selection mode.
 388     */
 389    draw_wide_line_threshold(st->draw, 1000.0f);
 390    draw_wide_point_threshold(st->draw, 1000.0f);
 391    draw_enable_line_stipple(st->draw, FALSE);
 392    draw_enable_point_sprites(st->draw, FALSE);
 393 }
 394
 395
 396 void
 397 st_destroy_draw(struct st_context *st)
 398 {
 399    draw_destroy(st->draw);
 400 }