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 #include "main/samplerobj.h"
  33
  34 #include "intel_mipmap_tree.h"
  35 #include "intel_tex.h"
  36
  37 #include "i915_context.h"
  38 #include "i915_reg.h"
  39
  40
  41 static GLuint
  42 translate_texture_format(gl_format mesa_format, 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    case MESA_FORMAT_X8_Z24:
  86       if (DepthMode == GL_ALPHA)
  87          return (MAPSURF_32BIT | MT_32BIT_x8A24);
  88       else if (DepthMode == GL_INTENSITY)
  89          return (MAPSURF_32BIT | MT_32BIT_x8I24);
  90       else
  91          return (MAPSURF_32BIT | MT_32BIT_x8L24);
  92    default:
  93       fprintf(stderr, "%s: bad image format %s\n", __FUNCTION__,
  94               _mesa_get_format_name(mesa_format));
  95       abort();
  96       return 0;
  97    }
  98 }
  99
 100
 101
 102
 103 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
 104  * Intel drivers for "other operating systems" implement GL_CLAMP as
 105  * GL_CLAMP_TO_EDGE, so the same is done here.
 106  */
 107 static GLuint
 108 translate_wrap_mode(GLenum wrap)
 109 {
 110    switch (wrap) {
 111    case GL_REPEAT:
 112       return TEXCOORDMODE_WRAP;
 113    case GL_CLAMP:
 114       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
 115    case GL_CLAMP_TO_EDGE:
 116       return TEXCOORDMODE_CLAMP_EDGE;
 117    case GL_CLAMP_TO_BORDER:
 118       return TEXCOORDMODE_CLAMP_BORDER;
 119    case GL_MIRRORED_REPEAT:
 120       return TEXCOORDMODE_MIRROR;
 121    default:
 122       return TEXCOORDMODE_WRAP;
 123    }
 124 }
 125
 126
 127
 128 /* Recalculate all state from scratch.  Perhaps not the most
 129  * efficient, but this has gotten complex enough that we need
 130  * something which is understandable and reliable.
 131  */
 132 static GLboolean
 133 i915_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
 134 {
 135    struct gl_context *ctx = &intel->ctx;
 136    struct i915_context *i915 = i915_context(ctx);
 137    struct gl_texture_unit *tUnit = &ctx->Texture.Unit[unit];
 138    struct gl_texture_object *tObj = tUnit->_Current;
 139    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 140    struct gl_texture_image *firstImage;
 141    struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
 142    GLuint *state = i915->state.Tex[unit], format, pitch;
 143    GLint lodbias, aniso = 0;
 144    GLubyte border[4];
 145    GLfloat maxlod;
 146
 147    memset(state, 0, sizeof(state));
 148
 149    /*We need to refcount these. */
 150
 151    if (i915->state.tex_buffer[unit] != NULL) {
 152        drm_intel_bo_unreference(i915->state.tex_buffer[unit]);
 153        i915->state.tex_buffer[unit] = NULL;
 154    }
 155
 156    if (!intel_finalize_mipmap_tree(intel, unit))
 157       return GL_FALSE;
 158
 159    /* Get first image here, since intelObj->firstLevel will get set in
 160     * the intel_finalize_mipmap_tree() call above.
 161     */
 162    firstImage = tObj->Image[0][tObj->BaseLevel];
 163
 164    drm_intel_bo_reference(intelObj->mt->region->buffer);
 165    i915->state.tex_buffer[unit] = intelObj->mt->region->buffer;
 166    i915->state.tex_offset[unit] = 0; /* Always the origin of the miptree */
 167
 168    format = translate_texture_format(firstImage->TexFormat,
 169                                      sampler->DepthMode);
 170    pitch = intelObj->mt->region->pitch * intelObj->mt->cpp;
 171
 172    state[I915_TEXREG_MS3] =
 173       (((firstImage->Height - 1) << MS3_HEIGHT_SHIFT) |
 174        ((firstImage->Width - 1) << MS3_WIDTH_SHIFT) | format);
 175
 176    if (intelObj->mt->region->tiling != I915_TILING_NONE) {
 177       state[I915_TEXREG_MS3] |= MS3_TILED_SURFACE;
 178       if (intelObj->mt->region->tiling == I915_TILING_Y)
 179          state[I915_TEXREG_MS3] |= MS3_TILE_WALK;
 180    }
 181
 182    /* We get one field with fraction bits for the maximum addressable
 183     * (lowest resolution) LOD.  Use it to cover both MAX_LEVEL and
 184     * MAX_LOD.
 185     */
 186    maxlod = MIN2(sampler->MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
 187    state[I915_TEXREG_MS4] =
 188       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT) |
 189        MS4_CUBE_FACE_ENA_MASK |
 190        (U_FIXED(CLAMP(maxlod, 0.0, 11.0), 2) << MS4_MAX_LOD_SHIFT) |
 191        ((firstImage->Depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
 192
 193
 194    {
 195       GLuint minFilt, mipFilt, magFilt;
 196
 197       switch (sampler->MinFilter) {
 198       case GL_NEAREST:
 199          minFilt = FILTER_NEAREST;
 200          mipFilt = MIPFILTER_NONE;
 201          break;
 202       case GL_LINEAR:
 203          minFilt = FILTER_LINEAR;
 204          mipFilt = MIPFILTER_NONE;
 205          break;
 206       case GL_NEAREST_MIPMAP_NEAREST:
 207          minFilt = FILTER_NEAREST;
 208          mipFilt = MIPFILTER_NEAREST;
 209          break;
 210       case GL_LINEAR_MIPMAP_NEAREST:
 211          minFilt = FILTER_LINEAR;
 212          mipFilt = MIPFILTER_NEAREST;
 213          break;
 214       case GL_NEAREST_MIPMAP_LINEAR:
 215          minFilt = FILTER_NEAREST;
 216          mipFilt = MIPFILTER_LINEAR;
 217          break;
 218       case GL_LINEAR_MIPMAP_LINEAR:
 219          minFilt = FILTER_LINEAR;
 220          mipFilt = MIPFILTER_LINEAR;
 221          break;
 222       default:
 223          return GL_FALSE;
 224       }
 225
 226       if (sampler->MaxAnisotropy > 1.0) {
 227          minFilt = FILTER_ANISOTROPIC;
 228          magFilt = FILTER_ANISOTROPIC;
 229          if (sampler->MaxAnisotropy > 2.0)
 230             aniso = SS2_MAX_ANISO_4;
 231          else
 232             aniso = SS2_MAX_ANISO_2;
 233       }
 234       else {
 235          switch (sampler->MagFilter) {
 236          case GL_NEAREST:
 237             magFilt = FILTER_NEAREST;
 238             break;
 239          case GL_LINEAR:
 240             magFilt = FILTER_LINEAR;
 241             break;
 242          default:
 243             return GL_FALSE;
 244          }
 245       }
 246
 247       lodbias = (int) ((tUnit->LodBias + sampler->LodBias) * 16.0);
 248       if (lodbias < -256)
 249           lodbias = -256;
 250       if (lodbias > 255)
 251           lodbias = 255;
 252       state[I915_TEXREG_SS2] = ((lodbias << SS2_LOD_BIAS_SHIFT) &
 253                                 SS2_LOD_BIAS_MASK);
 254
 255       /* YUV conversion:
 256        */
 257       if (firstImage->TexFormat == MESA_FORMAT_YCBCR ||
 258           firstImage->TexFormat == MESA_FORMAT_YCBCR_REV)
 259          state[I915_TEXREG_SS2] |= SS2_COLORSPACE_CONVERSION;
 260
 261       /* Shadow:
 262        */
 263       if (sampler->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB &&
 264           tObj->Target != GL_TEXTURE_3D) {
 265          if (tObj->Target == GL_TEXTURE_1D)
 266             return GL_FALSE;
 267
 268          state[I915_TEXREG_SS2] |=
 269             (SS2_SHADOW_ENABLE |
 270              intel_translate_shadow_compare_func(sampler->CompareFunc));
 271
 272          minFilt = FILTER_4X4_FLAT;
 273          magFilt = FILTER_4X4_FLAT;
 274       }
 275
 276       state[I915_TEXREG_SS2] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 277                                  (mipFilt << SS2_MIP_FILTER_SHIFT) |
 278                                  (magFilt << SS2_MAG_FILTER_SHIFT) |
 279                                  aniso);
 280    }
 281
 282    {
 283       GLenum ws = sampler->WrapS;
 284       GLenum wt = sampler->WrapT;
 285       GLenum wr = sampler->WrapR;
 286       float minlod;
 287
 288       /* We program 1D textures as 2D textures, so the 2D texcoord could
 289        * result in sampling border values if we don't set the T wrap to
 290        * repeat.
 291        */
 292       if (tObj->Target == GL_TEXTURE_1D)
 293          wt = GL_REPEAT;
 294
 295       /* 3D textures don't seem to respect the border color.
 296        * Fallback if there's ever a danger that they might refer to
 297        * it.
 298        *
 299        * Effectively this means fallback on 3D clamp or
 300        * clamp_to_border.
 301        */
 302       if (tObj->Target == GL_TEXTURE_3D &&
 303           (sampler->MinFilter != GL_NEAREST ||
 304            sampler->MagFilter != GL_NEAREST) &&
 305           (ws == GL_CLAMP ||
 306            wt == GL_CLAMP ||
 307            wr == GL_CLAMP ||
 308            ws == GL_CLAMP_TO_BORDER ||
 309            wt == GL_CLAMP_TO_BORDER || wr == GL_CLAMP_TO_BORDER))
 310          return GL_FALSE;
 311
 312       /* Only support TEXCOORDMODE_CLAMP_EDGE and TEXCOORDMODE_CUBE (not
 313        * used) when using cube map texture coordinates
 314        */
 315       if (tObj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 316           (((ws != GL_CLAMP) && (ws != GL_CLAMP_TO_EDGE)) ||
 317            ((wt != GL_CLAMP) && (wt != GL_CLAMP_TO_EDGE))))
 318           return GL_FALSE;
 319
 320       state[I915_TEXREG_SS3] = ss3;     /* SS3_NORMALIZED_COORDS */
 321
 322       state[I915_TEXREG_SS3] |=
 323          ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 324           (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 325           (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 326
 327       minlod = MIN2(sampler->MinLod, tObj->_MaxLevel - tObj->BaseLevel);
 328       state[I915_TEXREG_SS3] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
 329       state[I915_TEXREG_SS3] |= (U_FIXED(CLAMP(minlod, 0.0, 11.0), 4) <<
 330                                  SS3_MIN_LOD_SHIFT);
 331
 332    }
 333
 334    /* convert border color from float to ubyte */
 335    CLAMPED_FLOAT_TO_UBYTE(border[0], sampler->BorderColor.f[0]);
 336    CLAMPED_FLOAT_TO_UBYTE(border[1], sampler->BorderColor.f[1]);
 337    CLAMPED_FLOAT_TO_UBYTE(border[2], sampler->BorderColor.f[2]);
 338    CLAMPED_FLOAT_TO_UBYTE(border[3], sampler->BorderColor.f[3]);
 339
 340    if (firstImage->_BaseFormat == GL_DEPTH_COMPONENT) {
 341       /* GL specs that border color for depth textures is taken from the
 342        * R channel, while the hardware uses A.  Spam R into all the channels
 343        * for safety.
 344        */
 345       state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[0],
 346                                                border[0],
 347                                                border[0],
 348                                                border[0]);
 349    } else {
 350       state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[3],
 351                                                border[0],
 352                                                border[1],
 353                                                border[2]);
 354    }
 355
 356
 357    I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(unit), GL_TRUE);
 358    /* memcmp was already disabled, but definitely won't work as the
 359     * region might now change and that wouldn't be detected:
 360     */
 361    I915_STATECHANGE(i915, I915_UPLOAD_TEX(unit));
 362
 363
 364 #if 0
 365    DBG(TEXTURE, "state[I915_TEXREG_SS2] = 0x%x\n", state[I915_TEXREG_SS2]);
 366    DBG(TEXTURE, "state[I915_TEXREG_SS3] = 0x%x\n", state[I915_TEXREG_SS3]);
 367    DBG(TEXTURE, "state[I915_TEXREG_SS4] = 0x%x\n", state[I915_TEXREG_SS4]);
 368    DBG(TEXTURE, "state[I915_TEXREG_MS2] = 0x%x\n", state[I915_TEXREG_MS2]);
 369    DBG(TEXTURE, "state[I915_TEXREG_MS3] = 0x%x\n", state[I915_TEXREG_MS3]);
 370    DBG(TEXTURE, "state[I915_TEXREG_MS4] = 0x%x\n", state[I915_TEXREG_MS4]);
 371 #endif
 372
 373    return GL_TRUE;
 374 }
 375
 376
 377
 378
 379 void
 380 i915UpdateTextureState(struct intel_context *intel)
 381 {
 382    GLboolean ok = GL_TRUE;
 383    GLuint i;
 384
 385    for (i = 0; i < I915_TEX_UNITS && ok; i++) {
 386       switch (intel->ctx.Texture.Unit[i]._ReallyEnabled) {
 387       case TEXTURE_1D_BIT:
 388       case TEXTURE_2D_BIT:
 389       case TEXTURE_CUBE_BIT:
 390       case TEXTURE_3D_BIT:
 391          ok = i915_update_tex_unit(intel, i, SS3_NORMALIZED_COORDS);
 392          break;
 393       case TEXTURE_RECT_BIT:
 394          ok = i915_update_tex_unit(intel, i, 0);
 395          break;
 396       case 0:{
 397             struct i915_context *i915 = i915_context(&intel->ctx);
 398             if (i915->state.active & I915_UPLOAD_TEX(i))
 399                I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(i), GL_FALSE);
 400
 401             if (i915->state.tex_buffer[i] != NULL) {
 402                drm_intel_bo_unreference(i915->state.tex_buffer[i]);
 403                i915->state.tex_buffer[i] = NULL;
 404             }
 405
 406             break;
 407          }
 408       default:
 409          ok = GL_FALSE;
 410          break;
 411       }
 412    }
 413
 414    FALLBACK(intel, I915_FALLBACK_TEXTURE, !ok);
 415 }