src/gallium/drivers/softpipe/sp_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_memory.h"
  33 #include "util/u_inlines.h"
  34
  35 #include "draw/draw_context.h"
  36
  37 #include "sp_context.h"
  38 #include "sp_state.h"
  39 #include "sp_texture.h"
  40 #include "sp_tex_sample.h"
  41 #include "sp_tex_tile_cache.h"
  42
  43
  44 /**
  45  * Bind a range [start, start+num-1] of samplers for a shader stage.
  46  */
  47 static void
  48 softpipe_bind_sampler_states(struct pipe_context *pipe,
  49                              unsigned shader,
  50                              unsigned start,
  51                              unsigned num,
  52                              void **samplers)
  53 {
  54    struct softpipe_context *softpipe = softpipe_context(pipe);
  55    unsigned i;
  56
  57    assert(shader < PIPE_SHADER_TYPES);
  58    assert(start + num <= Elements(softpipe->samplers[shader]));
  59
  60    draw_flush(softpipe->draw);
  61
  62    /* set the new samplers */
  63    for (i = 0; i < num; i++) {
  64       softpipe->samplers[shader][start + i] = samplers[i];
  65    }
  66
  67    /* find highest non-null samplers[] entry */
  68    {
  69       unsigned j = MAX2(softpipe->num_samplers[shader], start + num);
  70       while (j > 0 && softpipe->samplers[shader][j - 1] == NULL)
  71          j--;
  72       softpipe->num_samplers[shader] = j;
  73    }
  74
  75    if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
  76       draw_set_samplers(softpipe->draw,
  77                         shader,
  78                         softpipe->samplers[shader],
  79                         softpipe->num_samplers[shader]);
  80    }
  81
  82    softpipe->dirty |= SP_NEW_SAMPLER;
  83 }
  84
  85
  86 static void
  87 softpipe_sampler_view_destroy(struct pipe_context *pipe,
  88                               struct pipe_sampler_view *view)
  89 {
  90    pipe_resource_reference(&view->texture, NULL);
  91    FREE(view);
  92 }
  93
  94
  95 void
  96 softpipe_set_sampler_views(struct pipe_context *pipe,
  97                            unsigned shader,
  98                            unsigned start,
  99                            unsigned num,
 100                            struct pipe_sampler_view **views)
 101 {
 102    struct softpipe_context *softpipe = softpipe_context(pipe);
 103    uint i;
 104
 105    assert(shader < PIPE_SHADER_TYPES);
 106    assert(start + num <= Elements(softpipe->sampler_views[shader]));
 107
 108    draw_flush(softpipe->draw);
 109
 110    /* set the new sampler views */
 111    for (i = 0; i < num; i++) {
 112       struct sp_sampler_view *sp_sviewsrc;
 113       struct sp_sampler_view *sp_sviewdst =
 114          &softpipe->tgsi.sampler[shader]->sp_sview[start + i];
 115       struct pipe_sampler_view **pview = &softpipe->sampler_views[shader][start + i];
 116       pipe_sampler_view_reference(pview, views[i]);
 117       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[shader][start + i],
 118                                          views[i]);
 119       /*
 120        * We don't really have variants, however some bits are different per shader,
 121        * so just copy?
 122        */
 123       sp_sviewsrc = (struct sp_sampler_view *)*pview;
 124       if (sp_sviewsrc) {
 125          memcpy(sp_sviewdst, sp_sviewsrc, sizeof(*sp_sviewsrc));
 126          sp_sviewdst->compute_lambda = softpipe_get_lambda_func(&sp_sviewdst->base, shader);
 127          sp_sviewdst->cache = softpipe->tex_cache[shader][start + i];
 128       }
 129       else {
 130          memset(sp_sviewdst, 0,  sizeof(*sp_sviewsrc));
 131       }
 132    }
 133
 134
 135    /* find highest non-null sampler_views[] entry */
 136    {
 137       unsigned j = MAX2(softpipe->num_sampler_views[shader], start + num);
 138       while (j > 0 && softpipe->sampler_views[shader][j - 1] == NULL)
 139          j--;
 140       softpipe->num_sampler_views[shader] = j;
 141    }
 142
 143    if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
 144       draw_set_sampler_views(softpipe->draw,
 145                              shader,
 146                              softpipe->sampler_views[shader],
 147                              softpipe->num_sampler_views[shader]);
 148    }
 149
 150    softpipe->dirty |= SP_NEW_TEXTURE;
 151 }
 152
 153
 154 static void
 155 softpipe_delete_sampler_state(struct pipe_context *pipe,
 156                               void *sampler)
 157 {
 158    FREE( sampler );
 159 }
 160
 161
 162 void
 163 softpipe_init_sampler_funcs(struct pipe_context *pipe)
 164 {
 165    pipe->create_sampler_state = softpipe_create_sampler_state;
 166    pipe->bind_sampler_states = softpipe_bind_sampler_states;
 167    pipe->delete_sampler_state = softpipe_delete_sampler_state;
 168
 169    pipe->create_sampler_view = softpipe_create_sampler_view;
 170    pipe->set_sampler_views = softpipe_set_sampler_views;
 171    pipe->sampler_view_destroy = softpipe_sampler_view_destroy;
 172 }
 173