src/mesa/drivers/dri/i915/i915_texstate.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 "main/mtypes.h"
  29 #include "main/enums.h"
  30 #include "main/macros.h"
  31 #include "main/colormac.h"
  32
  33 #include "intel_mipmap_tree.h"
  34 #include "intel_tex.h"
  35
  36 #include "i915_context.h"
  37 #include "i915_reg.h"
  38
  39
  40 static GLuint
  41 translate_texture_format(gl_format mesa_format, GLuint internal_format,
  42                          GLenum DepthMode)
  43 {
  44    switch (mesa_format) {
  45    case MESA_FORMAT_L8:
  46       return MAPSURF_8BIT | MT_8BIT_L8;
  47    case MESA_FORMAT_I8:
  48       return MAPSURF_8BIT | MT_8BIT_I8;
  49    case MESA_FORMAT_A8:
  50       return MAPSURF_8BIT | MT_8BIT_A8;
  51    case MESA_FORMAT_AL88:
  52       return MAPSURF_16BIT | MT_16BIT_AY88;
  53    case MESA_FORMAT_RGB565:
  54       return MAPSURF_16BIT | MT_16BIT_RGB565;
  55    case MESA_FORMAT_ARGB1555:
  56       return MAPSURF_16BIT | MT_16BIT_ARGB1555;
  57    case MESA_FORMAT_ARGB4444:
  58       return MAPSURF_16BIT | MT_16BIT_ARGB4444;
  59    case MESA_FORMAT_ARGB8888:
  60       return MAPSURF_32BIT | MT_32BIT_ARGB8888;
  61    case MESA_FORMAT_XRGB8888:
  62       return MAPSURF_32BIT | MT_32BIT_XRGB8888;
  63    case MESA_FORMAT_YCBCR_REV:
  64       return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
  65    case MESA_FORMAT_YCBCR:
  66       return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
  67    case MESA_FORMAT_RGB_FXT1:
  68    case MESA_FORMAT_RGBA_FXT1:
  69       return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
  70    case MESA_FORMAT_Z16:
  71       if (DepthMode == GL_ALPHA)
  72           return (MAPSURF_16BIT | MT_16BIT_A16);
  73       else if (DepthMode == GL_INTENSITY)
  74           return (MAPSURF_16BIT | MT_16BIT_I16);
  75       else
  76           return (MAPSURF_16BIT | MT_16BIT_L16);
  77    case MESA_FORMAT_RGBA_DXT1:
  78    case MESA_FORMAT_RGB_DXT1:
  79       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
  80    case MESA_FORMAT_RGBA_DXT3:
  81       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
  82    case MESA_FORMAT_RGBA_DXT5:
  83       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
  84    case MESA_FORMAT_S8_Z24:
  85       if (DepthMode == GL_ALPHA)
  86          return (MAPSURF_32BIT | MT_32BIT_x8A24);
  87       else if (DepthMode == GL_INTENSITY)
  88          return (MAPSURF_32BIT | MT_32BIT_x8I24);
  89       else
  90          return (MAPSURF_32BIT | MT_32BIT_x8L24);
  91    default:
  92       fprintf(stderr, "%s: bad image format %x\n", __FUNCTION__, mesa_format);
  93       abort();
  94       return 0;
  95    }
  96 }
  97
  98
  99
 100
 101 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
 102  * Intel drivers for "other operating systems" implement GL_CLAMP as
 103  * GL_CLAMP_TO_EDGE, so the same is done here.
 104  */
 105 static GLuint
 106 translate_wrap_mode(GLenum wrap)
 107 {
 108    switch (wrap) {
 109    case GL_REPEAT:
 110       return TEXCOORDMODE_WRAP;
 111    case GL_CLAMP:
 112       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
 113    case GL_CLAMP_TO_EDGE:
 114       return TEXCOORDMODE_CLAMP_EDGE;
 115    case GL_CLAMP_TO_BORDER:
 116       return TEXCOORDMODE_CLAMP_BORDER;
 117    case GL_MIRRORED_REPEAT:
 118       return TEXCOORDMODE_MIRROR;
 119    default:
 120       return TEXCOORDMODE_WRAP;
 121    }
 122 }
 123
 124
 125
 126 /* Recalculate all state from scratch.  Perhaps not the most
 127  * efficient, but this has gotten complex enough that we need
 128  * something which is understandable and reliable.
 129  */
 130 static GLboolean
 131 i915_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
 132 {
 133    GLcontext *ctx = &intel->ctx;
 134    struct i915_context *i915 = i915_context(ctx);
 135    struct gl_texture_unit *tUnit = &ctx->Texture.Unit[unit];
 136    struct gl_texture_object *tObj = tUnit->_Current;
 137    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 138    struct gl_texture_image *firstImage;
 139    GLuint *state = i915->state.Tex[unit], format, pitch;
 140    GLint lodbias, aniso = 0;
 141    GLubyte border[4];
 142    GLfloat maxlod;
 143
 144    memset(state, 0, sizeof(state));
 145
 146    /*We need to refcount these. */
 147
 148    if (i915->state.tex_buffer[unit] != NULL) {
 149        dri_bo_unreference(i915->state.tex_buffer[unit]);
 150        i915->state.tex_buffer[unit] = NULL;
 151    }
 152
 153    if (!intel_finalize_mipmap_tree(intel, unit))
 154       return GL_FALSE;
 155
 156    /* Get first image here, since intelObj->firstLevel will get set in
 157     * the intel_finalize_mipmap_tree() call above.
 158     */
 159    firstImage = tObj->Image[0][intelObj->firstLevel];
 160
 161    dri_bo_reference(intelObj->mt->region->buffer);
 162    i915->state.tex_buffer[unit] = intelObj->mt->region->buffer;
 163    i915->state.tex_offset[unit] = 0; /* Always the origin of the miptree */
 164
 165    format = translate_texture_format(firstImage->TexFormat,
 166                                      firstImage->InternalFormat,
 167                                      tObj->DepthMode);
 168    pitch = intelObj->mt->region->pitch * intelObj->mt->cpp;
 169
 170    state[I915_TEXREG_MS3] =
 171       (((firstImage->Height - 1) << MS3_HEIGHT_SHIFT) |
 172        ((firstImage->Width - 1) << MS3_WIDTH_SHIFT) | format);
 173
 174    if (intelObj->mt->region->tiling != I915_TILING_NONE) {
 175       state[I915_TEXREG_MS3] |= MS3_TILED_SURFACE;
 176       if (intelObj->mt->region->tiling == I915_TILING_Y)
 177          state[I915_TEXREG_MS3] |= MS3_TILE_WALK;
 178    }
 179
 180    /* We get one field with fraction bits for the maximum addressable
 181     * (lowest resolution) LOD.  Use it to cover both MAX_LEVEL and
 182     * MAX_LOD.
 183     */
 184    maxlod = MIN2(tObj->MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
 185    state[I915_TEXREG_MS4] =
 186       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT) |
 187        MS4_CUBE_FACE_ENA_MASK |
 188        (U_FIXED(CLAMP(maxlod, 0.0, 11.0), 2) << MS4_MAX_LOD_SHIFT) |
 189        ((firstImage->Depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
 190
 191
 192    {
 193       GLuint minFilt, mipFilt, magFilt;
 194
 195       switch (tObj->MinFilter) {
 196       case GL_NEAREST:
 197          minFilt = FILTER_NEAREST;
 198          mipFilt = MIPFILTER_NONE;
 199          break;
 200       case GL_LINEAR:
 201          minFilt = FILTER_LINEAR;
 202          mipFilt = MIPFILTER_NONE;
 203          break;
 204       case GL_NEAREST_MIPMAP_NEAREST:
 205          minFilt = FILTER_NEAREST;
 206          mipFilt = MIPFILTER_NEAREST;
 207          break;
 208       case GL_LINEAR_MIPMAP_NEAREST:
 209          minFilt = FILTER_LINEAR;
 210          mipFilt = MIPFILTER_NEAREST;
 211          break;
 212       case GL_NEAREST_MIPMAP_LINEAR:
 213          minFilt = FILTER_NEAREST;
 214          mipFilt = MIPFILTER_LINEAR;
 215          break;
 216       case GL_LINEAR_MIPMAP_LINEAR:
 217          minFilt = FILTER_LINEAR;
 218          mipFilt = MIPFILTER_LINEAR;
 219          break;
 220       default:
 221          return GL_FALSE;
 222       }
 223
 224       if (tObj->MaxAnisotropy > 1.0) {
 225          minFilt = FILTER_ANISOTROPIC;
 226          magFilt = FILTER_ANISOTROPIC;
 227          if (tObj->MaxAnisotropy > 2.0)
 228             aniso = SS2_MAX_ANISO_4;
 229          else
 230             aniso = SS2_MAX_ANISO_2;
 231       }
 232       else {
 233          switch (tObj->MagFilter) {
 234          case GL_NEAREST:
 235             magFilt = FILTER_NEAREST;
 236             break;
 237          case GL_LINEAR:
 238             magFilt = FILTER_LINEAR;
 239             break;
 240          default:
 241             return GL_FALSE;
 242          }
 243       }
 244
 245       lodbias = (int) ((tUnit->LodBias + tObj->LodBias) * 16.0);
 246       if (lodbias < -256)
 247           lodbias = -256;
 248       if (lodbias > 255)
 249           lodbias = 255;
 250       state[I915_TEXREG_SS2] = ((lodbias << SS2_LOD_BIAS_SHIFT) &
 251                                 SS2_LOD_BIAS_MASK);
 252
 253       /* YUV conversion:
 254        */
 255       if (firstImage->TexFormat == MESA_FORMAT_YCBCR ||
 256           firstImage->TexFormat == MESA_FORMAT_YCBCR_REV)
 257          state[I915_TEXREG_SS2] |= SS2_COLORSPACE_CONVERSION;
 258
 259       /* Shadow:
 260        */
 261       if (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB &&
 262           tObj->Target != GL_TEXTURE_3D) {
 263          if (tObj->Target == GL_TEXTURE_1D)
 264             return GL_FALSE;
 265
 266          state[I915_TEXREG_SS2] |=
 267             (SS2_SHADOW_ENABLE |
 268              intel_translate_shadow_compare_func(tObj->CompareFunc));
 269
 270          minFilt = FILTER_4X4_FLAT;
 271          magFilt = FILTER_4X4_FLAT;
 272       }
 273
 274       state[I915_TEXREG_SS2] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 275                                  (mipFilt << SS2_MIP_FILTER_SHIFT) |
 276                                  (magFilt << SS2_MAG_FILTER_SHIFT) |
 277                                  aniso);
 278    }
 279
 280    {
 281       GLenum ws = tObj->WrapS;
 282       GLenum wt = tObj->WrapT;
 283       GLenum wr = tObj->WrapR;
 284
 285       /* We program 1D textures as 2D textures, so the 2D texcoord could
 286        * result in sampling border values if we don't set the T wrap to
 287        * repeat.
 288        */
 289       if (tObj->Target == GL_TEXTURE_1D)
 290          wt = GL_REPEAT;
 291
 292       /* 3D textures don't seem to respect the border color.
 293        * Fallback if there's ever a danger that they might refer to
 294        * it.
 295        *
 296        * Effectively this means fallback on 3D clamp or
 297        * clamp_to_border.
 298        */
 299       if (tObj->Target == GL_TEXTURE_3D &&
 300           (tObj->MinFilter != GL_NEAREST ||
 301            tObj->MagFilter != GL_NEAREST) &&
 302           (ws == GL_CLAMP ||
 303            wt == GL_CLAMP ||
 304            wr == GL_CLAMP ||
 305            ws == GL_CLAMP_TO_BORDER ||
 306            wt == GL_CLAMP_TO_BORDER || wr == GL_CLAMP_TO_BORDER))
 307          return GL_FALSE;
 308
 309       /* Only support TEXCOORDMODE_CLAMP_EDGE and TEXCOORDMODE_CUBE (not
 310        * used) when using cube map texture coordinates
 311        */
 312       if (tObj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 313           (((ws != GL_CLAMP) && (ws != GL_CLAMP_TO_EDGE)) ||
 314            ((wt != GL_CLAMP) && (wt != GL_CLAMP_TO_EDGE))))
 315           return GL_FALSE;
 316
 317       state[I915_TEXREG_SS3] = ss3;     /* SS3_NORMALIZED_COORDS */
 318
 319       state[I915_TEXREG_SS3] |=
 320          ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 321           (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 322           (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 323
 324       state[I915_TEXREG_SS3] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
 325       state[I915_TEXREG_SS3] |= (U_FIXED(CLAMP(tObj->MinLod, 0.0, 11.0), 4) <<
 326                                  SS3_MIN_LOD_SHIFT);
 327
 328    }
 329
 330    /* convert border color from float to ubyte */
 331    CLAMPED_FLOAT_TO_UBYTE(border[0], tObj->BorderColor.f[0]);
 332    CLAMPED_FLOAT_TO_UBYTE(border[1], tObj->BorderColor.f[1]);
 333    CLAMPED_FLOAT_TO_UBYTE(border[2], tObj->BorderColor.f[2]);
 334    CLAMPED_FLOAT_TO_UBYTE(border[3], tObj->BorderColor.f[3]);
 335
 336    if (firstImage->_BaseFormat == GL_DEPTH_COMPONENT) {
 337       /* GL specs that border color for depth textures is taken from the
 338        * R channel, while the hardware uses A.  Spam R into all the channels
 339        * for safety.
 340        */
 341       state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[0],
 342                                                border[0],
 343                                                border[0],
 344                                                border[0]);
 345    } else {
 346       state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[3],
 347                                                border[0],
 348                                                border[1],
 349                                                border[2]);
 350    }
 351
 352
 353    I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(unit), GL_TRUE);
 354    /* memcmp was already disabled, but definitely won't work as the
 355     * region might now change and that wouldn't be detected:
 356     */
 357    I915_STATECHANGE(i915, I915_UPLOAD_TEX(unit));
 358
 359
 360 #if 0
 361    DBG(TEXTURE, "state[I915_TEXREG_SS2] = 0x%x\n", state[I915_TEXREG_SS2]);
 362    DBG(TEXTURE, "state[I915_TEXREG_SS3] = 0x%x\n", state[I915_TEXREG_SS3]);
 363    DBG(TEXTURE, "state[I915_TEXREG_SS4] = 0x%x\n", state[I915_TEXREG_SS4]);
 364    DBG(TEXTURE, "state[I915_TEXREG_MS2] = 0x%x\n", state[I915_TEXREG_MS2]);
 365    DBG(TEXTURE, "state[I915_TEXREG_MS3] = 0x%x\n", state[I915_TEXREG_MS3]);
 366    DBG(TEXTURE, "state[I915_TEXREG_MS4] = 0x%x\n", state[I915_TEXREG_MS4]);
 367 #endif
 368
 369    return GL_TRUE;
 370 }
 371
 372
 373
 374
 375 void
 376 i915UpdateTextureState(struct intel_context *intel)
 377 {
 378    GLboolean ok = GL_TRUE;
 379    GLuint i;
 380
 381    for (i = 0; i < I915_TEX_UNITS && ok; i++) {
 382       switch (intel->ctx.Texture.Unit[i]._ReallyEnabled) {
 383       case TEXTURE_1D_BIT:
 384       case TEXTURE_2D_BIT:
 385       case TEXTURE_CUBE_BIT:
 386       case TEXTURE_3D_BIT:
 387          ok = i915_update_tex_unit(intel, i, SS3_NORMALIZED_COORDS);
 388          break;
 389       case TEXTURE_RECT_BIT:
 390          ok = i915_update_tex_unit(intel, i, 0);
 391          break;
 392       case 0:{
 393             struct i915_context *i915 = i915_context(&intel->ctx);
 394             if (i915->state.active & I915_UPLOAD_TEX(i))
 395                I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(i), GL_FALSE);
 396
 397             if (i915->state.tex_buffer[i] != NULL) {
 398                dri_bo_unreference(i915->state.tex_buffer[i]);
 399                i915->state.tex_buffer[i] = NULL;
 400             }
 401
 402             break;
 403          }
 404       default:
 405          ok = GL_FALSE;
 406          break;
 407       }
 408    }
 409
 410    FALLBACK(intel, I915_FALLBACK_TEXTURE, !ok);
 411 }