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/errors.h"
  40 #include "main/imports.h"
  41 #include "main/image.h"
  42 #include "main/bufferobj.h"
  43 #include "main/macros.h"
  44 #include "main/varray.h"
  45
  46 #include "compiler/glsl/ir_uniform.h"
  47
  48 #include "vbo/vbo.h"
  49
  50 #include "st_context.h"
  51 #include "st_atom.h"
  52 #include "st_cb_bitmap.h"
  53 #include "st_cb_bufferobjects.h"
  54 #include "st_cb_xformfb.h"
  55 #include "st_debug.h"
  56 #include "st_draw.h"
  57 #include "st_program.h"
  58
  59 #include "pipe/p_context.h"
  60 #include "pipe/p_defines.h"
  61 #include "util/u_inlines.h"
  62 #include "util/u_format.h"
  63 #include "util/u_prim.h"
  64 #include "util/u_draw.h"
  65 #include "util/u_upload_mgr.h"
  66 #include "draw/draw_context.h"
  67 #include "cso_cache/cso_context.h"
  68
  69
  70 /**
  71  * Set the restart index.
  72  */
  73 static void
  74 setup_primitive_restart(struct gl_context *ctx, struct pipe_draw_info *info)
  75 {
  76    if (ctx->Array._PrimitiveRestart) {
  77       unsigned index_size = info->index_size;
  78
  79       info->restart_index =
  80          _mesa_primitive_restart_index(ctx, index_size);
  81
  82       /* Enable primitive restart only when the restart index can have an
  83        * effect. This is required for correctness in radeonsi VI support.
  84        * Other hardware may also benefit from taking a faster, non-restart path
  85        * when possible.
  86        */
  87       if (index_size == 4 || info->restart_index < (1 << (index_size * 8)))
  88          info->primitive_restart = true;
  89    }
  90 }
  91
  92
  93 /**
  94  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
  95  * the corresponding Gallium type.
  96  */
  97 static unsigned
  98 translate_prim(const struct gl_context *ctx, unsigned prim)
  99 {
 100    /* GL prims should match Gallium prims, spot-check a few */
 101    STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
 102    STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
 103    STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 104    STATIC_ASSERT(GL_PATCHES == PIPE_PRIM_PATCHES);
 105
 106    return prim;
 107 }
 108
 109 static inline void
 110 prepare_draw(struct st_context *st, struct gl_context *ctx)
 111 {
 112    /* Mesa core state should have been validated already */
 113    assert(ctx->NewState == 0x0);
 114
 115    if (unlikely(!st->bitmap.cache.empty))
 116       st_flush_bitmap_cache(st);
 117
 118    st_invalidate_readpix_cache(st);
 119
 120    /* Validate state. */
 121    if ((st->dirty | ctx->NewDriverState) & ST_PIPELINE_RENDER_STATE_MASK ||
 122        st->gfx_shaders_may_be_dirty) {
 123       st_validate_state(st, ST_PIPELINE_RENDER);
 124    }
 125 }
 126
 127 /**
 128  * This function gets plugged into the VBO module and is called when
 129  * we have something to render.
 130  * Basically, translate the information into the format expected by gallium.
 131  */
 132 static void
 133 st_draw_vbo(struct gl_context *ctx,
 134             const struct _mesa_prim *prims,
 135             GLuint nr_prims,
 136             const struct _mesa_index_buffer *ib,
 137             GLboolean index_bounds_valid,
 138             GLuint min_index,
 139             GLuint max_index,
 140             struct gl_transform_feedback_object *tfb_vertcount,
 141             unsigned stream,
 142             struct gl_buffer_object *indirect)
 143 {
 144    struct st_context *st = st_context(ctx);
 145    struct pipe_draw_info info;
 146    unsigned i;
 147    unsigned start = 0;
 148
 149    prepare_draw(st, ctx);
 150
 151    if (st->vertex_array_out_of_memory)
 152       return;
 153
 154    /* Initialize pipe_draw_info. */
 155    info.primitive_restart = false;
 156    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 157    info.indirect = NULL;
 158    info.count_from_stream_output = NULL;
 159    info.restart_index = 0;
 160
 161    if (ib) {
 162       struct gl_buffer_object *bufobj = ib->obj;
 163
 164       /* Get index bounds for user buffers. */
 165       if (!index_bounds_valid && st->draw_needs_minmax_index) {
 166          vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
 167                                 nr_prims);
 168       }
 169
 170       info.index_size = ib->index_size;
 171       info.min_index = min_index;
 172       info.max_index = max_index;
 173
 174       if (_mesa_is_bufferobj(bufobj)) {
 175          /* indices are in a real VBO */
 176          info.has_user_indices = false;
 177          info.index.resource = st_buffer_object(bufobj)->buffer;
 178
 179          /* Return if the bound element array buffer doesn't have any backing
 180           * storage. (nothing to do)
 181           */
 182          if (!info.index.resource)
 183             return;
 184
 185          start = pointer_to_offset(ib->ptr) / info.index_size;
 186       } else {
 187          /* indices are in user space memory */
 188          info.has_user_indices = true;
 189          info.index.user = ib->ptr;
 190       }
 191
 192       setup_primitive_restart(ctx, &info);
 193    }
 194    else {
 195       info.index_size = 0;
 196       info.has_user_indices = false;
 197
 198       /* Transform feedback drawing is always non-indexed. */
 199       /* Set info.count_from_stream_output. */
 200       if (tfb_vertcount) {
 201          if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
 202             return;
 203       }
 204    }
 205
 206    assert(!indirect);
 207
 208    /* do actual drawing */
 209    for (i = 0; i < nr_prims; i++) {
 210       info.count = prims[i].count;
 211
 212       /* Skip no-op draw calls. */
 213       if (!info.count && !tfb_vertcount)
 214          continue;
 215
 216       info.mode = translate_prim(ctx, prims[i].mode);
 217       info.start = start + prims[i].start;
 218       info.start_instance = prims[i].base_instance;
 219       info.instance_count = prims[i].num_instances;
 220       info.index_bias = prims[i].basevertex;
 221       info.drawid = prims[i].draw_id;
 222       if (!ib) {
 223          info.min_index = info.start;
 224          info.max_index = info.start + info.count - 1;
 225       }
 226
 227       if (ST_DEBUG & DEBUG_DRAW) {
 228          debug_printf("st/draw: mode %s  start %u  count %u  index_size %d\n",
 229                       u_prim_name(info.mode),
 230                       info.start,
 231                       info.count,
 232                       info.index_size);
 233       }
 234
 235       /* Don't call u_trim_pipe_prim. Drivers should do it if they need it. */
 236       cso_draw_vbo(st->cso_context, &info);
 237    }
 238 }
 239
 240 static void
 241 st_indirect_draw_vbo(struct gl_context *ctx,
 242                      GLuint mode,
 243                      struct gl_buffer_object *indirect_data,
 244                      GLsizeiptr indirect_offset,
 245                      unsigned draw_count,
 246                      unsigned stride,
 247                      struct gl_buffer_object *indirect_draw_count,
 248                      GLsizeiptr indirect_draw_count_offset,
 249                      const struct _mesa_index_buffer *ib)
 250 {
 251    struct st_context *st = st_context(ctx);
 252    struct pipe_draw_info info;
 253    struct pipe_draw_indirect_info indirect;
 254
 255    assert(stride);
 256    prepare_draw(st, ctx);
 257
 258    if (st->vertex_array_out_of_memory)
 259       return;
 260
 261    memset(&indirect, 0, sizeof(indirect));
 262    util_draw_init_info(&info);
 263    info.start = 0; /* index offset / index size */
 264
 265    if (ib) {
 266       struct gl_buffer_object *bufobj = ib->obj;
 267
 268       /* indices are always in a real VBO */
 269       assert(_mesa_is_bufferobj(bufobj));
 270
 271       info.index_size = ib->index_size;
 272       info.index.resource = st_buffer_object(bufobj)->buffer;
 273       info.start = pointer_to_offset(ib->ptr) / info.index_size;
 274
 275       /* Primitive restart is not handled by the VBO module in this case. */
 276       setup_primitive_restart(ctx, &info);
 277    }
 278
 279    info.mode = translate_prim(ctx, mode);
 280    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 281    info.indirect = &indirect;
 282    indirect.buffer = st_buffer_object(indirect_data)->buffer;
 283    indirect.offset = indirect_offset;
 284
 285    if (ST_DEBUG & DEBUG_DRAW) {
 286       debug_printf("st/draw indirect: mode %s drawcount %d index_size %d\n",
 287                    u_prim_name(info.mode),
 288                    draw_count,
 289                    info.index_size);
 290    }
 291
 292    if (!st->has_multi_draw_indirect) {
 293       int i;
 294
 295       assert(!indirect_draw_count);
 296       indirect.draw_count = 1;
 297       for (i = 0; i < draw_count; i++) {
 298          info.drawid = i;
 299          cso_draw_vbo(st->cso_context, &info);
 300          indirect.offset += stride;
 301       }
 302    } else {
 303       indirect.draw_count = draw_count;
 304       indirect.stride = stride;
 305       if (indirect_draw_count) {
 306          indirect.indirect_draw_count =
 307             st_buffer_object(indirect_draw_count)->buffer;
 308          indirect.indirect_draw_count_offset = indirect_draw_count_offset;
 309       }
 310       cso_draw_vbo(st->cso_context, &info);
 311    }
 312 }
 313
 314
 315 void
 316 st_init_draw_functions(struct dd_function_table *functions)
 317 {
 318    functions->Draw = st_draw_vbo;
 319    functions->DrawIndirect = st_indirect_draw_vbo;
 320 }
 321
 322
 323 void
 324 st_destroy_draw(struct st_context *st)
 325 {
 326    draw_destroy(st->draw);
 327 }
 328
 329 /**
 330  * Getter for the draw_context, so that initialization of it can happen only
 331  * when needed (the TGSI exec machines take up quite a bit of memory).
 332  */
 333 struct draw_context *
 334 st_get_draw_context(struct st_context *st)
 335 {
 336    if (!st->draw) {
 337       st->draw = draw_create(st->pipe);
 338       if (!st->draw) {
 339          _mesa_error(st->ctx, GL_OUT_OF_MEMORY, "feedback fallback allocation");
 340          return NULL;
 341       }
 342    }
 343
 344    /* Disable draw options that might convert points/lines to tris, etc.
 345     * as that would foul-up feedback/selection mode.
 346     */
 347    draw_wide_line_threshold(st->draw, 1000.0f);
 348    draw_wide_point_threshold(st->draw, 1000.0f);
 349    draw_enable_line_stipple(st->draw, FALSE);
 350    draw_enable_point_sprites(st->draw, FALSE);
 351
 352    return st->draw;
 353 }
 354
 355 /**
 356  * Draw a quad with given position, texcoords and color.
 357  */
 358 bool
 359 st_draw_quad(struct st_context *st,
 360              float x0, float y0, float x1, float y1, float z,
 361              float s0, float t0, float s1, float t1,
 362              const float *color,
 363              unsigned num_instances)
 364 {
 365    struct pipe_vertex_buffer vb = {0};
 366    struct st_util_vertex *verts;
 367
 368    vb.stride = sizeof(struct st_util_vertex);
 369
 370    u_upload_alloc(st->pipe->stream_uploader, 0,
 371                   4 * sizeof(struct st_util_vertex), 4,
 372                   &vb.buffer_offset, &vb.buffer.resource, (void **) &verts);
 373    if (!vb.buffer.resource) {
 374       return false;
 375    }
 376
 377    /* lower-left */
 378    verts[0].x = x0;
 379    verts[0].y = y1;
 380    verts[0].z = z;
 381    verts[0].r = color[0];
 382    verts[0].g = color[1];
 383    verts[0].b = color[2];
 384    verts[0].a = color[3];
 385    verts[0].s = s0;
 386    verts[0].t = t0;
 387
 388    /* lower-right */
 389    verts[1].x = x1;
 390    verts[1].y = y1;
 391    verts[1].z = z;
 392    verts[1].r = color[0];
 393    verts[1].g = color[1];
 394    verts[1].b = color[2];
 395    verts[1].a = color[3];
 396    verts[1].s = s1;
 397    verts[1].t = t0;
 398
 399    /* upper-right */
 400    verts[2].x = x1;
 401    verts[2].y = y0;
 402    verts[2].z = z;
 403    verts[2].r = color[0];
 404    verts[2].g = color[1];
 405    verts[2].b = color[2];
 406    verts[2].a = color[3];
 407    verts[2].s = s1;
 408    verts[2].t = t1;
 409
 410    /* upper-left */
 411    verts[3].x = x0;
 412    verts[3].y = y0;
 413    verts[3].z = z;
 414    verts[3].r = color[0];
 415    verts[3].g = color[1];
 416    verts[3].b = color[2];
 417    verts[3].a = color[3];
 418    verts[3].s = s0;
 419    verts[3].t = t1;
 420
 421    u_upload_unmap(st->pipe->stream_uploader);
 422
 423    cso_set_vertex_buffers(st->cso_context, 0, 1, &vb);
 424
 425    if (num_instances > 1) {
 426       cso_draw_arrays_instanced(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
 427                                 0, num_instances);
 428    } else {
 429       cso_draw_arrays(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
 430    }
 431
 432    pipe_resource_reference(&vb.buffer.resource, NULL);
 433
 434    return true;
 435 }