src/gallium/drivers/i915/i915_state_sampler.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 #include "pipe/p_context.h"
  29 #include "pipe/p_state.h"
  30
  31 #include "i915_state_inlines.h"
  32 #include "i915_context.h"
  33 #include "i915_reg.h"
  34 #include "i915_state.h"
  35 #include "i915_resource.h"
  36
  37
  38 /*
  39  * A note about min_lod & max_lod.
  40  *
  41  * There is a circular dependancy between the sampler state
  42  * and the map state to be submitted to hw.
  43  *
  44  * Two condition must be meet:
  45  * min_lod =< max_lod == true
  46  * max_lod =< last_level == true
  47  *
  48  *
  49  * This is all fine and dandy if it were for the fact that max_lod
  50  * is set on the map state instead of the sampler state. That is
  51  * the max_lod we submit on map is:
  52  * max_lod = MIN2(last_level, max_lod);
  53  *
  54  * So we need to update the map state when we change samplers and
  55  * we need to change the sampler state when map state is changed.
  56  * The first part is done by calling update_texture in update_samplers
  57  * and the second part is done else where in code tracking the state
  58  * changes.
  59  */
  60
  61 static void update_map(struct i915_context *i915,
  62                        uint unit,
  63                        const struct i915_texture *tex,
  64                        const struct i915_sampler_state *sampler,
  65                        const struct pipe_sampler_view* view,
  66                        uint state[3]);
  67
  68
  69
  70 /***********************************************************************
  71  * Samplers
  72  */
  73
  74 /**
  75  * Compute i915 texture sampling state.
  76  *
  77  * Recalculate all state from scratch.  Perhaps not the most
  78  * efficient, but this has gotten complex enough that we need
  79  * something which is understandable and reliable.
  80  * \param state  returns the 3 words of compute state
  81  */
  82 static void update_sampler(struct i915_context *i915,
  83                            uint unit,
  84                            const struct i915_sampler_state *sampler,
  85                            const struct i915_texture *tex,
  86                            unsigned state[3])
  87 {
  88    const struct pipe_resource *pt = &tex->b.b;
  89    unsigned minlod, lastlod;
  90
  91    state[0] = sampler->state[0];
  92    state[1] = sampler->state[1];
  93    state[2] = sampler->state[2];
  94
  95    if (pt->format == PIPE_FORMAT_UYVY ||
  96        pt->format == PIPE_FORMAT_YUYV)
  97       state[0] |= SS2_COLORSPACE_CONVERSION;
  98
  99    if (pt->format == PIPE_FORMAT_B8G8R8A8_SRGB ||
 100        pt->format == PIPE_FORMAT_L8_SRGB )
 101       state[0] |= SS2_REVERSE_GAMMA_ENABLE;
 102
 103     /* 3D textures don't seem to respect the border color.
 104     * Fallback if there's ever a danger that they might refer to
 105     * it.
 106     *
 107     * Effectively this means fallback on 3D clamp or
 108     * clamp_to_border.
 109     *
 110     * XXX: Check if this is true on i945.
 111     * XXX: Check if this bug got fixed in release silicon.
 112     */
 113 #if 0
 114    {
 115       const unsigned ws = sampler->templ->wrap_s;
 116       const unsigned wt = sampler->templ->wrap_t;
 117       const unsigned wr = sampler->templ->wrap_r;
 118       if (pt->target == PIPE_TEXTURE_3D &&
 119           (sampler->templ->min_img_filter != PIPE_TEX_FILTER_NEAREST ||
 120            sampler->templ->mag_img_filter != PIPE_TEX_FILTER_NEAREST) &&
 121           (ws == PIPE_TEX_WRAP_CLAMP ||
 122            wt == PIPE_TEX_WRAP_CLAMP ||
 123            wr == PIPE_TEX_WRAP_CLAMP ||
 124            ws == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
 125            wt == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
 126            wr == PIPE_TEX_WRAP_CLAMP_TO_BORDER)) {
 127          if (i915->conformance_mode > 0) {
 128             assert(0);
 129             /*             sampler->fallback = true; */
 130             /* TODO */
 131          }
 132       }
 133    }
 134 #endif
 135
 136    /* See note at the top of file */
 137    minlod = sampler->minlod;
 138    lastlod = pt->last_level << 4;
 139
 140    if (lastlod < minlod) {
 141       minlod = lastlod;
 142    }
 143
 144    state[1] |= (sampler->minlod << SS3_MIN_LOD_SHIFT);
 145    state[1] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
 146 }
 147
 148 static void update_samplers(struct i915_context *i915)
 149 {
 150    uint unit;
 151
 152    i915->current.sampler_enable_nr = 0;
 153    i915->current.sampler_enable_flags = 0x0;
 154
 155    for (unit = 0; unit < i915->num_fragment_sampler_views && unit < i915->num_samplers;
 156         unit++) {
 157       /* determine unit enable/disable by looking for a bound texture */
 158       /* could also examine the fragment program? */
 159       if (i915->fragment_sampler_views[unit]) {
 160          struct i915_texture *texture = i915_texture(i915->fragment_sampler_views[unit]->texture);
 161
 162          update_sampler(i915,
 163                         unit,
 164                         i915->fragment_sampler[unit], /* sampler state */
 165                         texture,                      /* texture */
 166                         i915->current.sampler[unit]); /* the result */
 167          update_map(i915,
 168                     unit,
 169                     texture,                             /* texture */
 170                     i915->fragment_sampler[unit],        /* sampler state */
 171                     i915->fragment_sampler_views[unit],  /* sampler view */
 172                     i915->current.texbuffer[unit]);      /* the result */
 173
 174          i915->current.sampler_enable_nr++;
 175          i915->current.sampler_enable_flags |= (1 << unit);
 176       }
 177    }
 178
 179    i915->hardware_dirty |= I915_HW_SAMPLER | I915_HW_MAP;
 180 }
 181
 182 struct i915_tracked_state i915_hw_samplers = {
 183    "samplers",
 184    update_samplers,
 185    I915_NEW_SAMPLER | I915_NEW_SAMPLER_VIEW
 186 };
 187
 188
 189 /***********************************************************************
 190  * Sampler views
 191  */
 192
 193 static uint translate_texture_format(enum pipe_format pipeFormat,
 194                                      const struct pipe_sampler_view* view)
 195 {
 196    if ( (view->swizzle_r != PIPE_SWIZZLE_X ||
 197          view->swizzle_g != PIPE_SWIZZLE_Y ||
 198          view->swizzle_b != PIPE_SWIZZLE_Z ||
 199          view->swizzle_a != PIPE_SWIZZLE_W ) &&
 200          pipeFormat != PIPE_FORMAT_Z24_UNORM_S8_UINT &&
 201          pipeFormat != PIPE_FORMAT_Z24X8_UNORM )
 202       debug_printf("i915: unsupported texture swizzle for format %d\n", pipeFormat);
 203
 204    switch (pipeFormat) {
 205    case PIPE_FORMAT_L8_UNORM:
 206       return MAPSURF_8BIT | MT_8BIT_L8;
 207    case PIPE_FORMAT_I8_UNORM:
 208       return MAPSURF_8BIT | MT_8BIT_I8;
 209    case PIPE_FORMAT_A8_UNORM:
 210       return MAPSURF_8BIT | MT_8BIT_A8;
 211    case PIPE_FORMAT_L8A8_UNORM:
 212       return MAPSURF_16BIT | MT_16BIT_AY88;
 213    case PIPE_FORMAT_B5G6R5_UNORM:
 214       return MAPSURF_16BIT | MT_16BIT_RGB565;
 215    case PIPE_FORMAT_B5G5R5A1_UNORM:
 216       return MAPSURF_16BIT | MT_16BIT_ARGB1555;
 217    case PIPE_FORMAT_B4G4R4A4_UNORM:
 218       return MAPSURF_16BIT | MT_16BIT_ARGB4444;
 219    case PIPE_FORMAT_B10G10R10A2_UNORM:
 220       return MAPSURF_32BIT | MT_32BIT_ARGB2101010;
 221    case PIPE_FORMAT_B8G8R8A8_UNORM:
 222    case PIPE_FORMAT_B8G8R8A8_SRGB:
 223       return MAPSURF_32BIT | MT_32BIT_ARGB8888;
 224    case PIPE_FORMAT_B8G8R8X8_UNORM:
 225       return MAPSURF_32BIT | MT_32BIT_XRGB8888;
 226    case PIPE_FORMAT_R8G8B8A8_UNORM:
 227       return MAPSURF_32BIT | MT_32BIT_ABGR8888;
 228    case PIPE_FORMAT_R8G8B8X8_UNORM:
 229       return MAPSURF_32BIT | MT_32BIT_XBGR8888;
 230    case PIPE_FORMAT_YUYV:
 231       return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
 232    case PIPE_FORMAT_UYVY:
 233       return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
 234 #if 0
 235    case PIPE_FORMAT_RGB_FXT1:
 236    case PIPE_FORMAT_RGBA_FXT1:
 237       return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
 238 #endif
 239    case PIPE_FORMAT_Z16_UNORM:
 240       return (MAPSURF_16BIT | MT_16BIT_L16);
 241    case PIPE_FORMAT_DXT1_RGBA:
 242    case PIPE_FORMAT_DXT1_RGB:
 243       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
 244    case PIPE_FORMAT_DXT3_RGBA:
 245       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
 246    case PIPE_FORMAT_DXT5_RGBA:
 247       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
 248    case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 249    case PIPE_FORMAT_Z24X8_UNORM:
 250       {
 251          if ( view->swizzle_r == PIPE_SWIZZLE_X &&
 252               view->swizzle_g == PIPE_SWIZZLE_X &&
 253               view->swizzle_b == PIPE_SWIZZLE_X &&
 254               view->swizzle_a == PIPE_SWIZZLE_1)
 255             return (MAPSURF_32BIT | MT_32BIT_xA824);
 256          if ( view->swizzle_r == PIPE_SWIZZLE_X &&
 257               view->swizzle_g == PIPE_SWIZZLE_X &&
 258               view->swizzle_b == PIPE_SWIZZLE_X &&
 259               view->swizzle_a == PIPE_SWIZZLE_X)
 260             return (MAPSURF_32BIT | MT_32BIT_xI824);
 261          if ( view->swizzle_r == PIPE_SWIZZLE_0 &&
 262               view->swizzle_g == PIPE_SWIZZLE_0 &&
 263               view->swizzle_b == PIPE_SWIZZLE_0 &&
 264               view->swizzle_a == PIPE_SWIZZLE_X)
 265             return (MAPSURF_32BIT | MT_32BIT_xL824);
 266          debug_printf("i915: unsupported depth swizzle %d %d %d %d\n",
 267                       view->swizzle_r,
 268                       view->swizzle_g,
 269                       view->swizzle_b,
 270                       view->swizzle_a);
 271          return (MAPSURF_32BIT | MT_32BIT_xL824);
 272       }
 273    default:
 274       debug_printf("i915: translate_texture_format() bad image format %x\n",
 275                    pipeFormat);
 276       assert(0);
 277       return 0;
 278    }
 279 }
 280
 281 static inline uint32_t
 282 ms3_tiling_bits(enum i915_winsys_buffer_tile tiling)
 283 {
 284          uint32_t tiling_bits = 0;
 285
 286          switch (tiling) {
 287          case I915_TILE_Y:
 288             tiling_bits |= MS3_TILE_WALK_Y;
 289          case I915_TILE_X:
 290             tiling_bits |= MS3_TILED_SURFACE;
 291          case I915_TILE_NONE:
 292             break;
 293          }
 294
 295          return tiling_bits;
 296 }
 297
 298 static void update_map(struct i915_context *i915,
 299                        uint unit,
 300                        const struct i915_texture *tex,
 301                        const struct i915_sampler_state *sampler,
 302                        const struct pipe_sampler_view* view,
 303                        uint state[3])
 304 {
 305    const struct pipe_resource *pt = &tex->b.b;
 306    uint width = pt->width0, height = pt->height0, depth = pt->depth0;
 307    int first_level = view->u.tex.first_level;
 308    const uint num_levels = pt->last_level - first_level;
 309    unsigned max_lod = num_levels * 4;
 310    bool is_npot = (!util_is_power_of_two_or_zero(pt->width0) ||
 311                    !util_is_power_of_two_or_zero(pt->height0));
 312    uint format, pitch;
 313
 314    /*
 315     * This is a bit messy. i915 doesn't support NPOT with mipmaps, but we can
 316     * still texture from a single level. This is useful to make u_blitter work.
 317     */
 318    if (is_npot) {
 319       width = u_minify(width, first_level);
 320       height = u_minify(height, first_level);
 321       max_lod = 1;
 322    }
 323
 324    assert(tex);
 325    assert(width);
 326    assert(height);
 327    assert(depth);
 328
 329    format = translate_texture_format(pt->format, view);
 330    pitch = tex->stride;
 331
 332    assert(format);
 333    assert(pitch);
 334
 335    /* MS3 state */
 336    state[0] =
 337       (((height - 1) << MS3_HEIGHT_SHIFT)
 338        | ((width - 1) << MS3_WIDTH_SHIFT)
 339        | format
 340        | ms3_tiling_bits(tex->tiling));
 341
 342    /*
 343     * XXX When min_filter != mag_filter and there's just one mipmap level,
 344     * set max_lod = 1 to make sure i915 chooses between min/mag filtering.
 345     */
 346
 347    /* See note at the top of file */
 348    if (max_lod > (sampler->maxlod >> 2))
 349       max_lod = sampler->maxlod >> 2;
 350
 351    /* MS4 state */
 352    state[1] =
 353       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT)
 354        | MS4_CUBE_FACE_ENA_MASK
 355        | ((max_lod) << MS4_MAX_LOD_SHIFT)
 356        | ((depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
 357
 358    if (is_npot)
 359       state[2] = i915_texture_offset(tex, first_level, 0);
 360    else
 361       state[2] = 0;
 362 }
 363
 364 static void update_maps(struct i915_context *i915)
 365 {
 366    uint unit;
 367
 368    for (unit = 0; unit < i915->num_fragment_sampler_views && unit < i915->num_samplers;
 369         unit++) {
 370       /* determine unit enable/disable by looking for a bound texture */
 371       /* could also examine the fragment program? */
 372       if (i915->fragment_sampler_views[unit]) {
 373          struct i915_texture *texture = i915_texture(i915->fragment_sampler_views[unit]->texture);
 374
 375          update_map(i915,
 376                     unit,
 377                     texture,                            /* texture */
 378                     i915->fragment_sampler[unit],       /* sampler state */
 379                     i915->fragment_sampler_views[unit], /* sampler view */
 380                     i915->current.texbuffer[unit]);
 381       }
 382    }
 383
 384    i915->hardware_dirty |= I915_HW_MAP;
 385 }
 386
 387 struct i915_tracked_state i915_hw_sampler_views = {
 388    "sampler_views",
 389    update_maps,
 390    I915_NEW_SAMPLER_VIEW
 391 };