src/gallium/drivers/i915/i915_state_sampler.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 #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 where 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 be 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[2]);
  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    /* 3D textures don't seem to respect the border color.
 100     * Fallback if there's ever a danger that they might refer to
 101     * it.
 102     *
 103     * Effectively this means fallback on 3D clamp or
 104     * clamp_to_border.
 105     *
 106     * XXX: Check if this is true on i945.
 107     * XXX: Check if this bug got fixed in release silicon.
 108     */
 109 #if 0
 110    {
 111       const unsigned ws = sampler->templ->wrap_s;
 112       const unsigned wt = sampler->templ->wrap_t;
 113       const unsigned wr = sampler->templ->wrap_r;
 114       if (pt->target == PIPE_TEXTURE_3D &&
 115           (sampler->templ->min_img_filter != PIPE_TEX_FILTER_NEAREST ||
 116            sampler->templ->mag_img_filter != PIPE_TEX_FILTER_NEAREST) &&
 117           (ws == PIPE_TEX_WRAP_CLAMP ||
 118            wt == PIPE_TEX_WRAP_CLAMP ||
 119            wr == PIPE_TEX_WRAP_CLAMP ||
 120            ws == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
 121            wt == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
 122            wr == PIPE_TEX_WRAP_CLAMP_TO_BORDER)) {
 123          if (i915->conformance_mode > 0) {
 124             assert(0);
 125             /*             sampler->fallback = true; */
 126             /* TODO */
 127          }
 128       }
 129    }
 130 #endif
 131
 132    /* See note at the top of file */
 133    minlod = sampler->minlod;
 134    lastlod = pt->last_level << 4;
 135
 136    if (lastlod < minlod) {
 137       minlod = lastlod;
 138    }
 139
 140    state[1] |= (sampler->minlod << SS3_MIN_LOD_SHIFT);
 141    state[1] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
 142 }
 143
 144 static void update_samplers(struct i915_context *i915)
 145 {
 146    uint unit;
 147
 148    i915->current.sampler_enable_nr = 0;
 149    i915->current.sampler_enable_flags = 0x0;
 150
 151    for (unit = 0; unit < i915->num_fragment_sampler_views && unit < i915->num_samplers;
 152         unit++) {
 153       /* determine unit enable/disable by looking for a bound texture */
 154       /* could also examine the fragment program? */
 155       if (i915->fragment_sampler_views[unit]) {
 156          struct i915_texture *texture = i915_texture(i915->fragment_sampler_views[unit]->texture);
 157
 158          update_sampler(i915,
 159                         unit,
 160                         i915->sampler[unit],          /* sampler state */
 161                         texture,                      /* texture */
 162                         i915->current.sampler[unit]); /* the result */
 163          update_map(i915,
 164                     unit,
 165                     texture,                             /* texture */
 166                     i915->sampler[unit],                 /* sampler state */
 167                     i915->fragment_sampler_views[unit],  /* sampler view */
 168                     i915->current.texbuffer[unit]);      /* the result */
 169
 170          i915->current.sampler_enable_nr++;
 171          i915->current.sampler_enable_flags |= (1 << unit);
 172       }
 173    }
 174
 175    i915->hardware_dirty |= I915_HW_SAMPLER | I915_HW_MAP;
 176 }
 177
 178 struct i915_tracked_state i915_hw_samplers = {
 179    "samplers",
 180    update_samplers,
 181    I915_NEW_SAMPLER | I915_NEW_SAMPLER_VIEW
 182 };
 183
 184
 185 /***********************************************************************
 186  * Sampler views
 187  */
 188
 189 static uint translate_texture_format(enum pipe_format pipeFormat,
 190                                      const struct pipe_sampler_view* view)
 191 {
 192    if ( (view->swizzle_r != PIPE_SWIZZLE_RED ||
 193          view->swizzle_g != PIPE_SWIZZLE_GREEN ||
 194          view->swizzle_b != PIPE_SWIZZLE_BLUE ||
 195          view->swizzle_a != PIPE_SWIZZLE_ALPHA ) &&
 196          pipeFormat != PIPE_FORMAT_Z24_UNORM_S8_USCALED &&
 197          pipeFormat != PIPE_FORMAT_Z24X8_UNORM )
 198       debug_printf("i915: unsupported texture swizzle for format %d\n", pipeFormat);
 199
 200    switch (pipeFormat) {
 201    case PIPE_FORMAT_L8_UNORM:
 202       return MAPSURF_8BIT | MT_8BIT_L8;
 203    case PIPE_FORMAT_I8_UNORM:
 204       return MAPSURF_8BIT | MT_8BIT_I8;
 205    case PIPE_FORMAT_A8_UNORM:
 206       return MAPSURF_8BIT | MT_8BIT_A8;
 207    case PIPE_FORMAT_L8A8_UNORM:
 208       return MAPSURF_16BIT | MT_16BIT_AY88;
 209    case PIPE_FORMAT_B5G6R5_UNORM:
 210       return MAPSURF_16BIT | MT_16BIT_RGB565;
 211    case PIPE_FORMAT_B5G5R5A1_UNORM:
 212       return MAPSURF_16BIT | MT_16BIT_ARGB1555;
 213    case PIPE_FORMAT_B4G4R4A4_UNORM:
 214       return MAPSURF_16BIT | MT_16BIT_ARGB4444;
 215    case PIPE_FORMAT_B8G8R8A8_UNORM:
 216       return MAPSURF_32BIT | MT_32BIT_ARGB8888;
 217    case PIPE_FORMAT_B8G8R8X8_UNORM:
 218       return MAPSURF_32BIT | MT_32BIT_XRGB8888;
 219    case PIPE_FORMAT_R8G8B8A8_UNORM:
 220       return MAPSURF_32BIT | MT_32BIT_ABGR8888;
 221    case PIPE_FORMAT_R8G8B8X8_UNORM:
 222       return MAPSURF_32BIT | MT_32BIT_XBGR8888;
 223    case PIPE_FORMAT_YUYV:
 224       return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
 225    case PIPE_FORMAT_UYVY:
 226       return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
 227 #if 0
 228    case PIPE_FORMAT_RGB_FXT1:
 229    case PIPE_FORMAT_RGBA_FXT1:
 230       return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
 231 #endif
 232    case PIPE_FORMAT_Z16_UNORM:
 233       return (MAPSURF_16BIT | MT_16BIT_L16);
 234    case PIPE_FORMAT_DXT1_RGBA:
 235    case PIPE_FORMAT_DXT1_RGB:
 236       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
 237    case PIPE_FORMAT_DXT3_RGBA:
 238       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
 239    case PIPE_FORMAT_DXT5_RGBA:
 240       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
 241    case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 242    case PIPE_FORMAT_Z24X8_UNORM:
 243       {
 244          if ( view->swizzle_r == PIPE_SWIZZLE_RED &&
 245               view->swizzle_g == PIPE_SWIZZLE_RED &&
 246               view->swizzle_b == PIPE_SWIZZLE_RED &&
 247               view->swizzle_a == PIPE_SWIZZLE_ONE)
 248             return (MAPSURF_32BIT | MT_32BIT_xA824);
 249          if ( view->swizzle_r == PIPE_SWIZZLE_RED &&
 250               view->swizzle_g == PIPE_SWIZZLE_RED &&
 251               view->swizzle_b == PIPE_SWIZZLE_RED &&
 252               view->swizzle_a == PIPE_SWIZZLE_RED)
 253             return (MAPSURF_32BIT | MT_32BIT_xI824);
 254          if ( view->swizzle_r == PIPE_SWIZZLE_ZERO &&
 255               view->swizzle_g == PIPE_SWIZZLE_ZERO &&
 256               view->swizzle_b == PIPE_SWIZZLE_ZERO &&
 257               view->swizzle_a == PIPE_SWIZZLE_RED)
 258             return (MAPSURF_32BIT | MT_32BIT_xL824);
 259          debug_printf("i915: unsupported depth swizzle\n");
 260          return (MAPSURF_32BIT | MT_32BIT_xL824);
 261       }
 262    default:
 263       debug_printf("i915: translate_texture_format() bad image format %x\n",
 264                    pipeFormat);
 265       assert(0);
 266       return 0;
 267    }
 268 }
 269
 270 static inline uint32_t
 271 ms3_tiling_bits(enum i915_winsys_buffer_tile tiling)
 272 {
 273          uint32_t tiling_bits = 0;
 274
 275          switch (tiling) {
 276          case I915_TILE_Y:
 277             tiling_bits |= MS3_TILE_WALK_Y;
 278          case I915_TILE_X:
 279             tiling_bits |= MS3_TILED_SURFACE;
 280          case I915_TILE_NONE:
 281             break;
 282          }
 283
 284          return tiling_bits;
 285 }
 286
 287 static void update_map(struct i915_context *i915,
 288                        uint unit,
 289                        const struct i915_texture *tex,
 290                        const struct i915_sampler_state *sampler,
 291                        const struct pipe_sampler_view* view,
 292                        uint state[2])
 293 {
 294    const struct pipe_resource *pt = &tex->b.b;
 295    uint format, pitch;
 296    const uint width = pt->width0, height = pt->height0, depth = pt->depth0;
 297    const uint num_levels = pt->last_level;
 298    unsigned max_lod = num_levels * 4;
 299
 300    assert(tex);
 301    assert(width);
 302    assert(height);
 303    assert(depth);
 304
 305    format = translate_texture_format(pt->format, view);
 306    pitch = tex->stride;
 307
 308    assert(format);
 309    assert(pitch);
 310
 311    /* MS3 state */
 312    state[0] =
 313       (((height - 1) << MS3_HEIGHT_SHIFT)
 314        | ((width - 1) << MS3_WIDTH_SHIFT)
 315        | format
 316        | ms3_tiling_bits(tex->tiling));
 317
 318    /*
 319     * XXX When min_filter != mag_filter and there's just one mipmap level,
 320     * set max_lod = 1 to make sure i915 chooses between min/mag filtering.
 321     */
 322
 323    /* See note at the top of file */
 324    if (max_lod > (sampler->maxlod >> 2))
 325       max_lod = sampler->maxlod >> 2;
 326
 327    /* MS4 state */
 328    state[1] =
 329       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT)
 330        | MS4_CUBE_FACE_ENA_MASK
 331        | ((max_lod) << MS4_MAX_LOD_SHIFT)
 332        | ((depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
 333 }
 334
 335 static void update_maps(struct i915_context *i915)
 336 {
 337    uint unit;
 338
 339    for (unit = 0; unit < i915->num_fragment_sampler_views && unit < i915->num_samplers;
 340         unit++) {
 341       /* determine unit enable/disable by looking for a bound texture */
 342       /* could also examine the fragment program? */
 343       if (i915->fragment_sampler_views[unit]) {
 344          struct i915_texture *texture = i915_texture(i915->fragment_sampler_views[unit]->texture);
 345
 346          update_map(i915,
 347                     unit,
 348                     texture,                            /* texture */
 349                     i915->sampler[unit],                /* sampler state */
 350                     i915->fragment_sampler_views[unit], /* sampler view */
 351                     i915->current.texbuffer[unit]);
 352       }
 353    }
 354
 355    i915->hardware_dirty |= I915_HW_MAP;
 356 }
 357
 358 struct i915_tracked_state i915_hw_sampler_views = {
 359    "sampler_views",
 360    update_maps,
 361    I915_NEW_SAMPLER_VIEW
 362 };