src/mesa/pipe/i915simple/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 "mtypes.h"
  29 //#include "enums.h"
  30 //#include "texformat.h"
  31 //#include "macros.h"
  32 //#include "dri_bufmgr.h"
  33
  34
  35 #include "pipe/p_context.h"
  36 #include "pipe/p_state.h"
  37 #include "pipe/p_util.h"
  38
  39 #include "i915_state_inlines.h"
  40 #include "i915_context.h"
  41 #include "i915_reg.h"
  42 #include "i915_state.h"
  43 //#include "i915_cache.h"
  44
  45
  46
  47
  48
  49
  50 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  51  * Intel drivers for "other operating systems" implement GL_CLAMP as
  52  * GL_CLAMP_TO_EDGE, so the same is done here.
  53  */
  54 static unsigned
  55 translate_wrap_mode(unsigned wrap)
  56 {
  57    switch (wrap) {
  58    case PIPE_TEX_WRAP_REPEAT:
  59       return TEXCOORDMODE_WRAP;
  60    case PIPE_TEX_WRAP_CLAMP:
  61       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  62    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  63       return TEXCOORDMODE_CLAMP_EDGE;
  64    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  65       return TEXCOORDMODE_CLAMP_BORDER;
  66 //   case PIPE_TEX_WRAP_MIRRORED_REPEAT:
  67 //      return TEXCOORDMODE_MIRROR;
  68    default:
  69       return TEXCOORDMODE_WRAP;
  70    }
  71 }
  72
  73 static unsigned translate_img_filter( unsigned filter )
  74 {
  75    switch (filter) {
  76    case PIPE_TEX_FILTER_NEAREST:
  77       return FILTER_NEAREST;
  78    case PIPE_TEX_FILTER_LINEAR:
  79       return FILTER_LINEAR;
  80    default:
  81       assert(0);
  82       return FILTER_NEAREST;
  83    }
  84 }
  85
  86 static unsigned translate_mip_filter( unsigned filter )
  87 {
  88    switch (filter) {
  89    case PIPE_TEX_MIPFILTER_NONE:
  90       return MIPFILTER_NONE;
  91    case PIPE_TEX_MIPFILTER_NEAREST:
  92       return MIPFILTER_NEAREST;
  93    case PIPE_TEX_FILTER_LINEAR:
  94       return MIPFILTER_LINEAR;
  95    default:
  96       assert(0);
  97       return MIPFILTER_NONE;
  98    }
  99 }
 100
 101 static unsigned translate_compare_func(unsigned func)
 102 {
 103    switch (func) {
 104    case PIPE_FUNC_NEVER:
 105    case PIPE_FUNC_LESS:
 106    case PIPE_FUNC_EQUAL:
 107    case PIPE_FUNC_LEQUAL:
 108    case PIPE_FUNC_GREATER:
 109    case PIPE_FUNC_NOTEQUAL:
 110    case PIPE_FUNC_GEQUAL:
 111    case PIPE_FUNC_ALWAYS:
 112       return 0;
 113    default:
 114       assert(0);
 115       return 0;
 116    }
 117 }
 118
 119
 120 static uint
 121 bitcount(uint k)
 122 {
 123    uint count = 0;
 124    while (k) {
 125       if (k & 1)
 126          count++;
 127       k = k >> 1;
 128    }
 129    return count;
 130 }
 131
 132
 133 static boolean
 134 is_power_of_two_texture(const struct pipe_mipmap_tree *mt)
 135 {
 136    if (bitcount(mt->width0) == 1 &&
 137        bitcount(mt->height0) == 1 &&
 138        bitcount(mt->depth0) == 1) {
 139       return 1;
 140    }
 141    else
 142       return 0;
 143 }
 144
 145
 146 /**
 147  * Compute i915 texture sampling state.
 148  *
 149  * Recalculate all state from scratch.  Perhaps not the most
 150  * efficient, but this has gotten complex enough that we need
 151  * something which is understandable and reliable.
 152  * \param state  returns the 3 words of compute state
 153  */
 154 static void update_sampler(struct i915_context *i915,
 155                            uint unit,
 156                            const struct pipe_sampler_state *sampler,
 157                            const struct pipe_mipmap_tree *mt,
 158                            unsigned state[3] )
 159 {
 160    const unsigned ws = sampler->wrap_s;
 161    const unsigned wt = sampler->wrap_t;
 162    const unsigned wr = sampler->wrap_r;
 163
 164    /* Need to do this after updating the maps, which call the
 165     * intel_finalize_mipmap_tree and hence can update firstLevel:
 166     */
 167    unsigned minFilt, magFilt;
 168    unsigned mipFilt;
 169
 170    state[0] = state[1] = state[2] = 0;
 171
 172    mipFilt = translate_mip_filter( sampler->min_mip_filter );
 173
 174    if (sampler->max_anisotropy > 1.0) {
 175       minFilt = FILTER_ANISOTROPIC;
 176       magFilt = FILTER_ANISOTROPIC;
 177    }
 178    else {
 179       minFilt = translate_img_filter( sampler->min_img_filter );
 180       magFilt = translate_img_filter( sampler->mag_img_filter );
 181    }
 182
 183    {
 184       int b = sampler->lod_bias * 16.0;
 185       b = CLAMP(b, -256, 255);
 186       state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 187    }
 188
 189    if (mt->format == PIPE_FORMAT_YCBCR ||
 190        mt->format == PIPE_FORMAT_YCBCR_REV)
 191       state[0] |= SS2_COLORSPACE_CONVERSION;
 192
 193
 194    /* Shadow:
 195     */
 196    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 197    {
 198       state[0] |= (SS2_SHADOW_ENABLE |
 199                    translate_compare_func(sampler->compare_func));
 200
 201       minFilt = FILTER_4X4_FLAT;
 202       magFilt = FILTER_4X4_FLAT;
 203    }
 204
 205    state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 206                 (mipFilt << SS2_MIP_FILTER_SHIFT) |
 207                 (magFilt << SS2_MAG_FILTER_SHIFT));
 208
 209
 210    /* 3D textures don't seem to respect the border color.
 211     * Fallback if there's ever a danger that they might refer to
 212     * it.
 213     *
 214     * Effectively this means fallback on 3D clamp or
 215     * clamp_to_border.
 216     *
 217     * XXX: Check if this is true on i945.
 218     * XXX: Check if this bug got fixed in release silicon.
 219     */
 220    if (mt->target == PIPE_TEXTURE_3D &&
 221        (sampler->min_img_filter != PIPE_TEX_FILTER_NEAREST ||
 222         sampler->mag_img_filter != PIPE_TEX_FILTER_NEAREST) &&
 223        (ws == PIPE_TEX_WRAP_CLAMP ||
 224         wt == PIPE_TEX_WRAP_CLAMP ||
 225         wr == PIPE_TEX_WRAP_CLAMP ||
 226         ws == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
 227         wt == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
 228         wr == PIPE_TEX_WRAP_CLAMP_TO_BORDER)) {
 229 #if 0
 230       if (i915->strict_conformance) {
 231          assert(0);
 232          /*         sampler->fallback = true; */
 233          /* TODO */
 234       }
 235 #endif
 236    }
 237
 238    state[1] =
 239       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 240        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 241        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT) |
 242        (unit << SS3_TEXTUREMAP_INDEX_SHIFT));
 243
 244    if (is_power_of_two_texture(mt)) {
 245       state[1] |= SS3_NORMALIZED_COORDS;
 246    }
 247
 248    {
 249       ubyte r = float_to_ubyte(sampler->border_color[0]);
 250       ubyte g = float_to_ubyte(sampler->border_color[1]);
 251       ubyte b = float_to_ubyte(sampler->border_color[2]);
 252       ubyte a = float_to_ubyte(sampler->border_color[3]);
 253       state[2] = I915PACKCOLOR8888(r, g, b, a);
 254    }
 255 }
 256
 257
 258
 259 void i915_update_samplers( struct i915_context *i915 )
 260 {
 261    uint unit;
 262
 263    i915->current.sampler_enable_nr = 0;
 264    i915->current.sampler_enable_flags = 0x0;
 265
 266    for (unit = 0; unit < I915_TEX_UNITS; unit++) {
 267       /* determine unit enable/disable by looking for a bound mipmap tree */
 268       /* could also examine the fragment program? */
 269       if (i915->texture[unit]) {
 270          update_sampler( i915,
 271                          unit,
 272                          i915->sampler + unit,       /* sampler state */
 273                          i915->texture[unit],        /* mipmap tree */
 274                          i915->current.sampler[unit] /* the result */
 275                          );
 276
 277          i915->current.sampler_enable_nr++;
 278          i915->current.sampler_enable_flags |= (1 << unit);
 279       }
 280    }
 281
 282    i915->hardware_dirty |= I915_HW_SAMPLER;
 283 }
 284
 285
 286
 287
 288 static uint
 289 translate_texture_format(uint pipeFormat)
 290 {
 291    switch (pipeFormat) {
 292    case PIPE_FORMAT_U_L8:
 293       return MAPSURF_8BIT | MT_8BIT_L8;
 294    case PIPE_FORMAT_U_I8:
 295       return MAPSURF_8BIT | MT_8BIT_I8;
 296    case PIPE_FORMAT_U_A8:
 297       return MAPSURF_8BIT | MT_8BIT_A8;
 298    case PIPE_FORMAT_U_A8_L8:
 299       return MAPSURF_16BIT | MT_16BIT_AY88;
 300    case PIPE_FORMAT_U_R5_G6_B5:
 301       return MAPSURF_16BIT | MT_16BIT_RGB565;
 302    case PIPE_FORMAT_U_A1_R5_G5_B5:
 303       return MAPSURF_16BIT | MT_16BIT_ARGB1555;
 304    case PIPE_FORMAT_U_A4_R4_G4_B4:
 305       return MAPSURF_16BIT | MT_16BIT_ARGB4444;
 306    case PIPE_FORMAT_U_A8_R8_G8_B8:
 307       return MAPSURF_32BIT | MT_32BIT_ARGB8888;
 308    case PIPE_FORMAT_YCBCR_REV:
 309       return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
 310    case PIPE_FORMAT_YCBCR:
 311       return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
 312 #if 0
 313    case PIPE_FORMAT_RGB_FXT1:
 314    case PIPE_FORMAT_RGBA_FXT1:
 315       return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
 316 #endif
 317    case PIPE_FORMAT_U_Z16:
 318       return (MAPSURF_16BIT | MT_16BIT_L16);
 319 #if 0
 320    case PIPE_FORMAT_RGBA_DXT1:
 321    case PIPE_FORMAT_RGB_DXT1:
 322       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
 323    case PIPE_FORMAT_RGBA_DXT3:
 324       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
 325    case PIPE_FORMAT_RGBA_DXT5:
 326       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
 327 #endif
 328    case PIPE_FORMAT_S8_Z24:
 329       return (MAPSURF_32BIT | MT_32BIT_xL824);
 330    default:
 331       fprintf(stderr, "i915: translate_texture_format() bad image format %x\n",
 332               pipeFormat);
 333       assert(0);
 334       return 0;
 335    }
 336 }
 337
 338
 339 #define I915_TEXREG_MS3        1
 340 #define I915_TEXREG_MS4        2
 341
 342
 343 static void
 344 i915_update_texture(struct i915_context *i915, uint unit,
 345                     uint state[6])
 346 {
 347    const struct pipe_mipmap_tree *mt = i915->texture[unit];
 348    uint format, pitch;
 349    const uint width = mt->width0, height = mt->height0, depth = mt->depth0;
 350    const uint num_levels = mt->last_level - mt->first_level;
 351
 352    assert(mt);
 353    assert(width);
 354    assert(height);
 355    assert(depth);
 356
 357 #if 0
 358    if (i915->state.tex_buffer[unit] != NULL) {
 359        driBOUnReference(i915->state.tex_buffer[unit]);
 360        i915->state.tex_buffer[unit] = NULL;
 361    }
 362 #endif
 363
 364
 365    {
 366       struct pipe_buffer_handle *p = driBOReference(mt->region->buffer);
 367    }
 368
 369 #if 0
 370    i915->state.tex_buffer[unit] = driBOReference(intelObj->mt->region->
 371                                                  buffer);
 372    i915->state.tex_offset[unit] =  intel_miptree_image_offset(intelObj->mt,
 373                                                               0, intelObj->
 374                                                               firstLevel);
 375 #endif
 376
 377    format = translate_texture_format(mt->format);
 378    pitch = mt->pitch * mt->cpp;
 379
 380    assert(format);
 381    assert(pitch);
 382
 383    printf("texture format = 0x%x\n", format);
 384
 385    /* MS3 state */
 386    state[0] =
 387       (((height - 1) << MS3_HEIGHT_SHIFT)
 388        | ((width - 1) << MS3_WIDTH_SHIFT)
 389        | format
 390        | MS3_USE_FENCE_REGS);
 391
 392    /* MS4 state */
 393    state[1] =
 394       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT)
 395        | MS4_CUBE_FACE_ENA_MASK
 396        | ((num_levels * 4) << MS4_MAX_LOD_SHIFT)
 397        | ((depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
 398 }
 399
 400
 401
 402 void
 403 i915_update_textures(struct i915_context *i915)
 404 {
 405    uint unit;
 406
 407    for (unit = 0; unit < I915_TEX_UNITS; unit++) {
 408       /* determine unit enable/disable by looking for a bound mipmap tree */
 409       /* could also examine the fragment program? */
 410       if (i915->texture[unit]) {
 411          i915_update_texture(i915, unit, i915->current.texbuffer[unit]);
 412       }
 413    }
 414
 415    i915->hardware_dirty |= I915_HW_MAP;
 416 }