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
  44 #include "vbo/vbo.h"
  45
  46 #include "st_context.h"
  47 #include "st_atom.h"
  48 #include "st_cb_bufferobjects.h"
  49 #include "st_cb_xformfb.h"
  50 #include "st_debug.h"
  51 #include "st_draw.h"
  52 #include "st_program.h"
  53
  54 #include "pipe/p_context.h"
  55 #include "pipe/p_defines.h"
  56 #include "util/u_inlines.h"
  57 #include "util/u_format.h"
  58 #include "util/u_prim.h"
  59 #include "util/u_draw_quad.h"
  60 #include "util/u_upload_mgr.h"
  61 #include "draw/draw_context.h"
  62 #include "cso_cache/cso_context.h"
  63
  64 #include "../glsl/ir_uniform.h"
  65
  66
  67 /**
  68  * This is very similar to vbo_all_varyings_in_vbos() but we are
  69  * only interested in per-vertex data.  See bug 38626.
  70  */
  71 static GLboolean
  72 all_varyings_in_vbos(const struct gl_client_array *arrays[])
  73 {
  74    GLuint i;
  75
  76    for (i = 0; i < VERT_ATTRIB_MAX; i++)
  77       if (arrays[i]->StrideB &&
  78           !arrays[i]->InstanceDivisor &&
  79           !_mesa_is_bufferobj(arrays[i]->BufferObj))
  80          return GL_FALSE;
  81
  82    return GL_TRUE;
  83 }
  84
  85
  86 /**
  87  * Basically, translate Mesa's index buffer information into
  88  * a pipe_index_buffer object.
  89  * \return TRUE or FALSE for success/failure
  90  */
  91 static boolean
  92 setup_index_buffer(struct st_context *st,
  93                    const struct _mesa_index_buffer *ib,
  94                    struct pipe_index_buffer *ibuffer)
  95 {
  96    struct gl_buffer_object *bufobj = ib->obj;
  97
  98    ibuffer->index_size = vbo_sizeof_ib_type(ib->type);
  99
 100    /* get/create the index buffer object */
 101    if (_mesa_is_bufferobj(bufobj)) {
 102       /* indices are in a real VBO */
 103       ibuffer->buffer = st_buffer_object(bufobj)->buffer;
 104       ibuffer->offset = pointer_to_offset(ib->ptr);
 105    }
 106    else if (st->indexbuf_uploader) {
 107       /* upload indexes from user memory into a real buffer */
 108       if (u_upload_data(st->indexbuf_uploader, 0,
 109                         ib->count * ibuffer->index_size, ib->ptr,
 110                         &ibuffer->offset, &ibuffer->buffer) != PIPE_OK) {
 111          /* out of memory */
 112          return FALSE;
 113       }
 114       u_upload_unmap(st->indexbuf_uploader);
 115    }
 116    else {
 117       /* indices are in user space memory */
 118       ibuffer->user_buffer = ib->ptr;
 119    }
 120
 121    cso_set_index_buffer(st->cso_context, ibuffer);
 122    return TRUE;
 123 }
 124
 125
 126 /**
 127  * Prior to drawing, check that any uniforms referenced by the
 128  * current shader have been set.  If a uniform has not been set,
 129  * issue a warning.
 130  */
 131 static void
 132 check_uniforms(struct gl_context *ctx)
 133 {
 134    struct gl_shader_program **shProg = ctx->_Shader->CurrentProgram;
 135    unsigned j;
 136
 137    for (j = 0; j < 3; j++) {
 138       unsigned i;
 139
 140       if (shProg[j] == NULL || !shProg[j]->LinkStatus)
 141          continue;
 142
 143       for (i = 0; i < shProg[j]->NumUserUniformStorage; i++) {
 144          const struct gl_uniform_storage *u = &shProg[j]->UniformStorage[i];
 145          if (!u->initialized) {
 146             _mesa_warning(ctx,
 147                           "Using shader with uninitialized uniform: %s",
 148                           u->name);
 149          }
 150       }
 151    }
 152 }
 153
 154
 155 /**
 156  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 157  * the corresponding Gallium type.
 158  */
 159 static unsigned
 160 translate_prim(const struct gl_context *ctx, unsigned prim)
 161 {
 162    /* GL prims should match Gallium prims, spot-check a few */
 163    STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
 164    STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
 165    STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 166
 167    return prim;
 168 }
 169
 170
 171 /**
 172  * This function gets plugged into the VBO module and is called when
 173  * we have something to render.
 174  * Basically, translate the information into the format expected by gallium.
 175  */
 176 void
 177 st_draw_vbo(struct gl_context *ctx,
 178             const struct _mesa_prim *prims,
 179             GLuint nr_prims,
 180             const struct _mesa_index_buffer *ib,
 181             GLboolean index_bounds_valid,
 182             GLuint min_index,
 183             GLuint max_index,
 184             struct gl_transform_feedback_object *tfb_vertcount,
 185             struct gl_buffer_object *indirect)
 186 {
 187    struct st_context *st = st_context(ctx);
 188    struct pipe_index_buffer ibuffer = {0};
 189    struct pipe_draw_info info;
 190    const struct gl_client_array **arrays = ctx->Array._DrawArrays;
 191    unsigned i;
 192
 193    /* Mesa core state should have been validated already */
 194    assert(ctx->NewState == 0x0);
 195
 196    /* Validate state. */
 197    if (st->dirty.st || ctx->NewDriverState) {
 198       st_validate_state(st);
 199
 200 #if 0
 201       if (MESA_VERBOSE & VERBOSE_GLSL) {
 202          check_uniforms(ctx);
 203       }
 204 #else
 205       (void) check_uniforms;
 206 #endif
 207    }
 208
 209    if (st->vertex_array_out_of_memory) {
 210       return;
 211    }
 212
 213    util_draw_init_info(&info);
 214
 215    if (ib) {
 216       /* Get index bounds for user buffers. */
 217       if (!index_bounds_valid)
 218          if (!all_varyings_in_vbos(arrays))
 219             vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
 220                                    nr_prims);
 221
 222       if (!setup_index_buffer(st, ib, &ibuffer)) {
 223          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBegin/DrawElements/DrawArray");
 224          return;
 225       }
 226
 227       info.indexed = TRUE;
 228       if (min_index != ~0 && max_index != ~0) {
 229          info.min_index = min_index;
 230          info.max_index = max_index;
 231       }
 232
 233       /* The VBO module handles restart for the non-indexed GLDrawArrays
 234        * so we only set these fields for indexed drawing:
 235        */
 236       info.primitive_restart = ctx->Array._PrimitiveRestart;
 237       info.restart_index = ctx->Array.RestartIndex;
 238    }
 239    else {
 240       /* Transform feedback drawing is always non-indexed. */
 241       /* Set info.count_from_stream_output. */
 242       if (tfb_vertcount) {
 243          st_transform_feedback_draw_init(tfb_vertcount, &info);
 244       }
 245    }
 246
 247    if (indirect) {
 248       info.indirect = st_buffer_object(indirect)->buffer;
 249
 250       /* Primitive restart is not handled by the VBO module in this case. */
 251       info.primitive_restart = ctx->Array._PrimitiveRestart;
 252       info.restart_index = ctx->Array.RestartIndex;
 253    }
 254
 255    /* do actual drawing */
 256    for (i = 0; i < nr_prims; i++) {
 257       info.mode = translate_prim(ctx, prims[i].mode);
 258       info.start = prims[i].start;
 259       info.count = prims[i].count;
 260       info.start_instance = prims[i].base_instance;
 261       info.instance_count = prims[i].num_instances;
 262       info.index_bias = prims[i].basevertex;
 263       if (!ib) {
 264          info.min_index = info.start;
 265          info.max_index = info.start + info.count - 1;
 266       }
 267       info.indirect_offset = prims[i].indirect_offset;
 268
 269       if (ST_DEBUG & DEBUG_DRAW) {
 270          debug_printf("st/draw: mode %s  start %u  count %u  indexed %d\n",
 271                       u_prim_name(info.mode),
 272                       info.start,
 273                       info.count,
 274                       info.indexed);
 275       }
 276
 277       if (info.count_from_stream_output || info.indirect) {
 278          cso_draw_vbo(st->cso_context, &info);
 279       }
 280       else if (info.primitive_restart) {
 281          /* don't trim, restarts might be inside index list */
 282          cso_draw_vbo(st->cso_context, &info);
 283       }
 284       else if (u_trim_pipe_prim(prims[i].mode, &info.count)) {
 285          cso_draw_vbo(st->cso_context, &info);
 286       }
 287    }
 288
 289    if (ib && st->indexbuf_uploader && !_mesa_is_bufferobj(ib->obj)) {
 290       pipe_resource_reference(&ibuffer.buffer, NULL);
 291    }
 292 }
 293
 294
 295 void
 296 st_init_draw(struct st_context *st)
 297 {
 298    struct gl_context *ctx = st->ctx;
 299
 300    vbo_set_draw_func(ctx, st_draw_vbo);
 301
 302    st->draw = draw_create(st->pipe); /* for selection/feedback */
 303
 304    /* Disable draw options that might convert points/lines to tris, etc.
 305     * as that would foul-up feedback/selection mode.
 306     */
 307    draw_wide_line_threshold(st->draw, 1000.0f);
 308    draw_wide_point_threshold(st->draw, 1000.0f);
 309    draw_enable_line_stipple(st->draw, FALSE);
 310    draw_enable_point_sprites(st->draw, FALSE);
 311 }
 312
 313
 314 void
 315 st_destroy_draw(struct st_context *st)
 316 {
 317    draw_destroy(st->draw);
 318 }