src/gallium/drivers/llvmpipe/lp_state_sampler.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 /* Authors:
  29  *  Brian Paul
  30  */
  31
  32 #include "util/u_inlines.h"
  33 #include "util/u_memory.h"
  34
  35 #include "draw/draw_context.h"
  36
  37 #include "lp_context.h"
  38 #include "lp_screen.h"
  39 #include "lp_state.h"
  40 #include "lp_debug.h"
  41 #include "state_tracker/sw_winsys.h"
  42
  43
  44 static void *
  45 llvmpipe_create_sampler_state(struct pipe_context *pipe,
  46                               const struct pipe_sampler_state *sampler)
  47 {
  48    struct pipe_sampler_state *state = mem_dup(sampler, sizeof *sampler);
  49
  50    if (LP_PERF & PERF_NO_MIP_LINEAR) {
  51       if (state->min_mip_filter == PIPE_TEX_MIPFILTER_LINEAR)
  52          state->min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
  53    }
  54
  55    if (LP_PERF & PERF_NO_MIPMAPS)
  56       state->min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
  57
  58    if (LP_PERF & PERF_NO_LINEAR) {
  59       state->mag_img_filter = PIPE_TEX_FILTER_NEAREST;
  60       state->min_img_filter = PIPE_TEX_FILTER_NEAREST;
  61    }
  62
  63    return state;
  64 }
  65
  66
  67 static void
  68 llvmpipe_bind_sampler_states(struct pipe_context *pipe,
  69                              unsigned shader,
  70                              unsigned start,
  71                              unsigned num,
  72                              void **samplers)
  73 {
  74    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  75    unsigned i;
  76
  77    assert(shader < PIPE_SHADER_TYPES);
  78    assert(start + num <= Elements(llvmpipe->samplers[shader]));
  79
  80    /* Check for no-op */
  81    if (start + num <= llvmpipe->num_samplers[shader] &&
  82        !memcmp(llvmpipe->samplers[shader] + start, samplers,
  83                num * sizeof(void *))) {
  84       return;
  85    }
  86
  87    draw_flush(llvmpipe->draw);
  88
  89    /* set the new samplers */
  90    for (i = 0; i < num; i++) {
  91       llvmpipe->samplers[shader][start + i] = samplers[i];
  92    }
  93
  94    /* find highest non-null samplers[] entry */
  95    {
  96       unsigned j = MAX2(llvmpipe->num_samplers[shader], start + num);
  97       while (j > 0 && llvmpipe->samplers[shader][j - 1] == NULL)
  98          j--;
  99       llvmpipe->num_samplers[shader] = j;
 100    }
 101
 102    if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
 103       draw_set_samplers(llvmpipe->draw,
 104                         shader,
 105                         llvmpipe->samplers[shader],
 106                         llvmpipe->num_samplers[shader]);
 107    }
 108
 109    llvmpipe->dirty |= LP_NEW_SAMPLER;
 110 }
 111
 112
 113 static void
 114 llvmpipe_set_sampler_views(struct pipe_context *pipe,
 115                            unsigned shader,
 116                            unsigned start,
 117                            unsigned num,
 118                            struct pipe_sampler_view **views)
 119 {
 120    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 121    uint i;
 122
 123    assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
 124
 125    assert(shader < PIPE_SHADER_TYPES);
 126    assert(start + num <= Elements(llvmpipe->sampler_views[shader]));
 127
 128    /* Check for no-op */
 129    if (start + num <= llvmpipe->num_sampler_views[shader] &&
 130        !memcmp(llvmpipe->sampler_views[shader] + start, views,
 131                num * sizeof(struct pipe_sampler_view *))) {
 132       return;
 133    }
 134
 135    draw_flush(llvmpipe->draw);
 136
 137    /* set the new sampler views */
 138    for (i = 0; i < num; i++) {
 139       /* Note: we're using pipe_sampler_view_release() here to work around
 140        * a possible crash when the old view belongs to another context that
 141        * was already destroyed.
 142        */
 143       pipe_sampler_view_release(pipe,
 144                                 &llvmpipe->sampler_views[shader][start + i]);
 145       pipe_sampler_view_reference(&llvmpipe->sampler_views[shader][start + i],
 146                                   views[i]);
 147    }
 148
 149    /* find highest non-null sampler_views[] entry */
 150    {
 151       unsigned j = MAX2(llvmpipe->num_sampler_views[shader], start + num);
 152       while (j > 0 && llvmpipe->sampler_views[shader][j - 1] == NULL)
 153          j--;
 154       llvmpipe->num_sampler_views[shader] = j;
 155    }
 156
 157    if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
 158       draw_set_sampler_views(llvmpipe->draw,
 159                              shader,
 160                              llvmpipe->sampler_views[shader],
 161                              llvmpipe->num_sampler_views[shader]);
 162    }
 163
 164    llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
 165 }
 166
 167
 168 static struct pipe_sampler_view *
 169 llvmpipe_create_sampler_view(struct pipe_context *pipe,
 170                             struct pipe_resource *texture,
 171                             const struct pipe_sampler_view *templ)
 172 {
 173    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 174    /*
 175     * XXX we REALLY want to see the correct bind flag here but the OpenGL
 176     * state tracker can't guarantee that at least for texture buffer objects.
 177     */
 178    if (!(texture->bind & PIPE_BIND_SAMPLER_VIEW))
 179       debug_printf("Illegal sampler view creation without bind flag\n");
 180
 181    if (view) {
 182       *view = *templ;
 183       view->reference.count = 1;
 184       view->texture = NULL;
 185       pipe_resource_reference(&view->texture, texture);
 186       view->context = pipe;
 187    }
 188
 189    return view;
 190 }
 191
 192
 193 static void
 194 llvmpipe_sampler_view_destroy(struct pipe_context *pipe,
 195                               struct pipe_sampler_view *view)
 196 {
 197    pipe_resource_reference(&view->texture, NULL);
 198    FREE(view);
 199 }
 200
 201
 202 static void
 203 llvmpipe_delete_sampler_state(struct pipe_context *pipe,
 204                               void *sampler)
 205 {
 206    FREE( sampler );
 207 }
 208
 209
 210 static void
 211 prepare_shader_sampling(
 212    struct llvmpipe_context *lp,
 213    unsigned num,
 214    struct pipe_sampler_view **views,
 215    unsigned shader_type,
 216    struct pipe_resource *mapped_tex[PIPE_MAX_SHADER_SAMPLER_VIEWS])
 217 {
 218
 219    unsigned i;
 220    uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
 221    uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
 222    uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
 223    const void *addr;
 224
 225    assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
 226    if (!num)
 227       return;
 228
 229    for (i = 0; i < PIPE_MAX_SHADER_SAMPLER_VIEWS; i++) {
 230       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 231
 232       if (view) {
 233          struct pipe_resource *tex = view->texture;
 234          struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
 235          unsigned width0 = tex->width0;
 236          unsigned num_layers = tex->depth0;
 237          unsigned first_level = 0;
 238          unsigned last_level = 0;
 239
 240          /* We're referencing the texture's internal data, so save a
 241           * reference to it.
 242           */
 243          pipe_resource_reference(&mapped_tex[i], tex);
 244
 245          if (!lp_tex->dt) {
 246             /* regular texture - setup array of mipmap level offsets */
 247             struct pipe_resource *res = view->texture;
 248             int j;
 249             void *mip_ptr;
 250
 251             if (llvmpipe_resource_is_texture(res)) {
 252                first_level = view->u.tex.first_level;
 253                last_level = view->u.tex.last_level;
 254                assert(first_level <= last_level);
 255                assert(last_level <= res->last_level);
 256
 257                /* must trigger allocation first before we can get base ptr */
 258                /* XXX this may fail due to OOM ? */
 259                mip_ptr = llvmpipe_get_texture_image_all(lp_tex, view->u.tex.first_level,
 260                                                         LP_TEX_USAGE_READ);
 261                addr = lp_tex->linear_img.data;
 262
 263                for (j = first_level; j <= last_level; j++) {
 264                   mip_ptr = llvmpipe_get_texture_image_all(lp_tex, j,
 265                                                            LP_TEX_USAGE_READ);
 266                   mip_offsets[j] = (uint8_t *)mip_ptr - (uint8_t *)addr;
 267                   /*
 268                    * could get mip offset directly but need call above to
 269                    * invoke tiled->linear conversion.
 270                    */
 271                   assert(lp_tex->linear_mip_offsets[j] == mip_offsets[j]);
 272                   row_stride[j] = lp_tex->row_stride[j];
 273                   img_stride[j] = lp_tex->img_stride[j];
 274                }
 275                if (res->target == PIPE_TEXTURE_1D_ARRAY ||
 276                    res->target == PIPE_TEXTURE_2D_ARRAY) {
 277                   num_layers = view->u.tex.last_layer - view->u.tex.first_layer + 1;
 278                   for (j = first_level; j <= last_level; j++) {
 279                      mip_offsets[j] += view->u.tex.first_layer *
 280                                        lp_tex->img_stride[j];
 281                   }
 282                   assert(view->u.tex.first_layer <= view->u.tex.last_layer);
 283                   assert(view->u.tex.last_layer < res->array_size);
 284                }
 285             }
 286             else {
 287                unsigned view_blocksize = util_format_get_blocksize(view->format);
 288                mip_ptr = lp_tex->data;
 289                addr = mip_ptr;
 290                /* probably don't really need to fill that out */
 291                mip_offsets[0] = 0;
 292                row_stride[0] = 0;
 293                row_stride[0] = 0;
 294
 295                /* everything specified in number of elements here. */
 296                width0 = view->u.buf.last_element - view->u.buf.first_element + 1;
 297                addr = (uint8_t *)addr + view->u.buf.first_element *
 298                                view_blocksize;
 299                assert(view->u.buf.first_element <= view->u.buf.last_element);
 300                assert(view->u.buf.last_element * view_blocksize < res->width0);
 301             }
 302          }
 303          else {
 304             /* display target texture/surface */
 305             /*
 306              * XXX: Where should this be unmapped?
 307              */
 308             struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
 309             struct sw_winsys *winsys = screen->winsys;
 310             addr = winsys->displaytarget_map(winsys, lp_tex->dt,
 311                                                 PIPE_TRANSFER_READ);
 312             row_stride[0] = lp_tex->row_stride[0];
 313             img_stride[0] = lp_tex->img_stride[0];
 314             mip_offsets[0] = 0;
 315             assert(addr);
 316          }
 317          draw_set_mapped_texture(lp->draw,
 318                                  shader_type,
 319                                  i,
 320                                  width0, tex->height0, num_layers,
 321                                  first_level, last_level,
 322                                  addr,
 323                                  row_stride, img_stride, mip_offsets);
 324       }
 325    }
 326 }
 327
 328
 329 /**
 330  * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
 331  */
 332 void
 333 llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *lp,
 334                                  unsigned num,
 335                                  struct pipe_sampler_view **views)
 336 {
 337    prepare_shader_sampling(lp, num, views, PIPE_SHADER_VERTEX,
 338                            lp->mapped_vs_tex);
 339 }
 340
 341 void
 342 llvmpipe_cleanup_vertex_sampling(struct llvmpipe_context *ctx)
 343 {
 344    unsigned i;
 345    for (i = 0; i < Elements(ctx->mapped_vs_tex); i++) {
 346       pipe_resource_reference(&ctx->mapped_vs_tex[i], NULL);
 347    }
 348 }
 349
 350
 351 /**
 352  * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
 353  */
 354 void
 355 llvmpipe_prepare_geometry_sampling(struct llvmpipe_context *lp,
 356                                    unsigned num,
 357                                    struct pipe_sampler_view **views)
 358 {
 359    prepare_shader_sampling(lp, num, views, PIPE_SHADER_GEOMETRY,
 360                            lp->mapped_gs_tex);
 361 }
 362
 363 void
 364 llvmpipe_cleanup_geometry_sampling(struct llvmpipe_context *ctx)
 365 {
 366    unsigned i;
 367    for (i = 0; i < Elements(ctx->mapped_gs_tex); i++) {
 368       pipe_resource_reference(&ctx->mapped_gs_tex[i], NULL);
 369    }
 370 }
 371
 372 void
 373 llvmpipe_init_sampler_funcs(struct llvmpipe_context *llvmpipe)
 374 {
 375    llvmpipe->pipe.create_sampler_state = llvmpipe_create_sampler_state;
 376
 377    llvmpipe->pipe.bind_sampler_states = llvmpipe_bind_sampler_states;
 378    llvmpipe->pipe.create_sampler_view = llvmpipe_create_sampler_view;
 379    llvmpipe->pipe.set_sampler_views = llvmpipe_set_sampler_views;
 380    llvmpipe->pipe.sampler_view_destroy = llvmpipe_sampler_view_destroy;
 381    llvmpipe->pipe.delete_sampler_state = llvmpipe_delete_sampler_state;
 382 }