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