src/gallium/drivers/svga/svga_pipe_sampler.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "util/u_inlines.h"
  27 #include "pipe/p_defines.h"
  28 #include "util/u_format.h"
  29 #include "util/u_math.h"
  30 #include "util/u_memory.h"
  31 #include "tgsi/tgsi_parse.h"
  32
  33 #include "svga_context.h"
  34 #include "svga_resource_texture.h"
  35
  36 #include "svga_debug.h"
  37
  38 static INLINE unsigned
  39 translate_wrap_mode(unsigned wrap)
  40 {
  41    switch (wrap) {
  42    case PIPE_TEX_WRAP_REPEAT:
  43       return SVGA3D_TEX_ADDRESS_WRAP;
  44
  45    case PIPE_TEX_WRAP_CLAMP:
  46       return SVGA3D_TEX_ADDRESS_CLAMP;
  47
  48    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  49       /* Unfortunately SVGA3D_TEX_ADDRESS_EDGE not respected by
  50        * hardware.
  51        */
  52       return SVGA3D_TEX_ADDRESS_CLAMP;
  53
  54    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  55       return SVGA3D_TEX_ADDRESS_BORDER;
  56
  57    case PIPE_TEX_WRAP_MIRROR_REPEAT:
  58       return SVGA3D_TEX_ADDRESS_MIRROR;
  59
  60    case PIPE_TEX_WRAP_MIRROR_CLAMP:
  61    case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  62    case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  63       return SVGA3D_TEX_ADDRESS_MIRRORONCE;
  64
  65    default:
  66       assert(0);
  67       return SVGA3D_TEX_ADDRESS_WRAP;
  68    }
  69 }
  70
  71 static INLINE unsigned translate_img_filter( unsigned filter )
  72 {
  73    switch (filter) {
  74    case PIPE_TEX_FILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
  75    case PIPE_TEX_FILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
  76    default:
  77       assert(0);
  78       return SVGA3D_TEX_FILTER_NEAREST;
  79    }
  80 }
  81
  82 static INLINE unsigned translate_mip_filter( unsigned filter )
  83 {
  84    switch (filter) {
  85    case PIPE_TEX_MIPFILTER_NONE:    return SVGA3D_TEX_FILTER_NONE;
  86    case PIPE_TEX_MIPFILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
  87    case PIPE_TEX_MIPFILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
  88    default:
  89       assert(0);
  90       return SVGA3D_TEX_FILTER_NONE;
  91    }
  92 }
  93
  94 static void *
  95 svga_create_sampler_state(struct pipe_context *pipe,
  96                           const struct pipe_sampler_state *sampler)
  97 {
  98    struct svga_context *svga = svga_context(pipe);
  99    struct svga_sampler_state *cso = CALLOC_STRUCT( svga_sampler_state );
 100
 101    if (!cso)
 102       return NULL;
 103
 104    cso->mipfilter = translate_mip_filter(sampler->min_mip_filter);
 105    cso->magfilter = translate_img_filter( sampler->mag_img_filter );
 106    cso->minfilter = translate_img_filter( sampler->min_img_filter );
 107    cso->aniso_level = MAX2( sampler->max_anisotropy, 1 );
 108    if(sampler->max_anisotropy)
 109       cso->magfilter = cso->minfilter = SVGA3D_TEX_FILTER_ANISOTROPIC;
 110    cso->lod_bias = sampler->lod_bias;
 111    cso->addressu = translate_wrap_mode(sampler->wrap_s);
 112    cso->addressv = translate_wrap_mode(sampler->wrap_t);
 113    cso->addressw = translate_wrap_mode(sampler->wrap_r);
 114    cso->normalized_coords = sampler->normalized_coords;
 115    cso->compare_mode = sampler->compare_mode;
 116    cso->compare_func = sampler->compare_func;
 117
 118    {
 119       uint32 r = float_to_ubyte(sampler->border_color.f[0]);
 120       uint32 g = float_to_ubyte(sampler->border_color.f[1]);
 121       uint32 b = float_to_ubyte(sampler->border_color.f[2]);
 122       uint32 a = float_to_ubyte(sampler->border_color.f[3]);
 123
 124       cso->bordercolor = (a << 24) | (r << 16) | (g << 8) | b;
 125    }
 126
 127    /* No SVGA3D support for:
 128     *    - min/max LOD clamping
 129     */
 130    cso->min_lod = 0;
 131    cso->view_min_lod = MAX2((int) (sampler->min_lod + 0.5), 0);
 132    cso->view_max_lod = MAX2((int) (sampler->max_lod + 0.5), 0);
 133
 134    /* Use min_mipmap */
 135    if (svga->debug.use_min_mipmap) {
 136       if (cso->view_min_lod == cso->view_max_lod) {
 137          cso->min_lod = cso->view_min_lod;
 138          cso->view_min_lod = 0;
 139          cso->view_max_lod = 1000; /* Just a high number */
 140          cso->mipfilter = SVGA3D_TEX_FILTER_NONE;
 141       }
 142    }
 143
 144    SVGA_DBG(DEBUG_VIEWS, "min %u, view(min %u, max %u) lod, mipfilter %s\n",
 145             cso->min_lod, cso->view_min_lod, cso->view_max_lod,
 146             cso->mipfilter == SVGA3D_TEX_FILTER_NONE ? "SVGA3D_TEX_FILTER_NONE" : "SOMETHING");
 147
 148    return cso;
 149 }
 150
 151 static void
 152 svga_bind_sampler_states(struct pipe_context *pipe,
 153                          unsigned shader,
 154                          unsigned start,
 155                          unsigned num,
 156                          void **samplers)
 157 {
 158    struct svga_context *svga = svga_context(pipe);
 159    unsigned i;
 160
 161    assert(shader < PIPE_SHADER_TYPES);
 162    assert(start + num <= PIPE_MAX_SAMPLERS);
 163
 164    /* we only support fragment shader samplers at this time */
 165    if (shader != PIPE_SHADER_FRAGMENT)
 166       return;
 167
 168    /* Check for no-op */
 169    if (start + num <= svga->curr.num_samplers &&
 170        !memcmp(svga->curr.sampler + start, samplers, num * sizeof(void *))) {
 171       if (0) debug_printf("sampler noop\n");
 172       return;
 173    }
 174
 175    for (i = 0; i < num; i++)
 176       svga->curr.sampler[start + i] = samplers[i];
 177
 178    /* find highest non-null sampler_views[] entry */
 179    {
 180       unsigned j = MAX2(svga->curr.num_samplers, start + num);
 181       while (j > 0 && svga->curr.sampler[j - 1] == NULL)
 182          j--;
 183       svga->curr.num_samplers = j;
 184    }
 185
 186    svga->dirty |= SVGA_NEW_SAMPLER;
 187 }
 188
 189
 190 static void svga_delete_sampler_state(struct pipe_context *pipe,
 191                                       void *sampler)
 192 {
 193    FREE(sampler);
 194 }
 195
 196
 197 static struct pipe_sampler_view *
 198 svga_create_sampler_view(struct pipe_context *pipe,
 199                          struct pipe_resource *texture,
 200                          const struct pipe_sampler_view *templ)
 201 {
 202    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 203
 204    if (view) {
 205       *view = *templ;
 206       view->reference.count = 1;
 207       view->texture = NULL;
 208       pipe_resource_reference(&view->texture, texture);
 209       view->context = pipe;
 210    }
 211
 212    return view;
 213 }
 214
 215
 216 static void
 217 svga_sampler_view_destroy(struct pipe_context *pipe,
 218                           struct pipe_sampler_view *view)
 219 {
 220    pipe_resource_reference(&view->texture, NULL);
 221    FREE(view);
 222 }
 223
 224 static void
 225 svga_set_sampler_views(struct pipe_context *pipe,
 226                        unsigned shader,
 227                        unsigned start,
 228                        unsigned num,
 229                        struct pipe_sampler_view **views)
 230 {
 231    struct svga_context *svga = svga_context(pipe);
 232    unsigned flag_1d = 0;
 233    unsigned flag_srgb = 0;
 234    uint i;
 235
 236    assert(shader < PIPE_SHADER_TYPES);
 237    assert(start + num <= Elements(svga->curr.sampler_views));
 238
 239    /* we only support fragment shader sampler views at this time */
 240    if (shader != PIPE_SHADER_FRAGMENT)
 241       return;
 242
 243    /* Check for no-op */
 244    if (start + num <= svga->curr.num_sampler_views &&
 245        !memcmp(svga->curr.sampler_views + start, views,
 246                num * sizeof(struct pipe_sampler_view *))) {
 247       if (0) debug_printf("texture noop\n");
 248       return;
 249    }
 250
 251    for (i = 0; i < num; i++) {
 252       if (svga->curr.sampler_views[start + i] != views[i]) {
 253          /* Note: we're using pipe_sampler_view_release() here to work around
 254           * a possible crash when the old view belongs to another context that
 255           * was already destroyed.
 256           */
 257          pipe_sampler_view_release(pipe, &svga->curr.sampler_views[start + i]);
 258          pipe_sampler_view_reference(&svga->curr.sampler_views[start + i],
 259                                      views[i]);
 260       }
 261
 262       if (!views[i])
 263          continue;
 264
 265       if (util_format_is_srgb(views[i]->format))
 266          flag_srgb |= 1 << (start + i);
 267
 268       if (views[i]->texture->target == PIPE_TEXTURE_1D)
 269          flag_1d |= 1 << (start + i);
 270    }
 271
 272    /* find highest non-null sampler_views[] entry */
 273    {
 274       unsigned j = MAX2(svga->curr.num_sampler_views, start + num);
 275       while (j > 0 && svga->curr.sampler_views[j - 1] == NULL)
 276          j--;
 277       svga->curr.num_sampler_views = j;
 278    }
 279
 280    svga->dirty |= SVGA_NEW_TEXTURE_BINDING;
 281
 282    if (flag_srgb != svga->curr.tex_flags.flag_srgb ||
 283        flag_1d != svga->curr.tex_flags.flag_1d)
 284    {
 285       svga->dirty |= SVGA_NEW_TEXTURE_FLAGS;
 286       svga->curr.tex_flags.flag_1d = flag_1d;
 287       svga->curr.tex_flags.flag_srgb = flag_srgb;
 288    }
 289 }
 290
 291
 292 void svga_init_sampler_functions( struct svga_context *svga )
 293 {
 294    svga->pipe.create_sampler_state = svga_create_sampler_state;
 295    svga->pipe.bind_sampler_states = svga_bind_sampler_states;
 296    svga->pipe.delete_sampler_state = svga_delete_sampler_state;
 297    svga->pipe.set_sampler_views = svga_set_sampler_views;
 298    svga->pipe.create_sampler_view = svga_create_sampler_view;
 299    svga->pipe.sampler_view_destroy = svga_sampler_view_destroy;
 300 }
 301
 302
 303