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_RGBA8888_REV:
  64       return MAPSURF_32BIT | MT_32BIT_ABGR8888;
  65    case MESA_FORMAT_YCBCR_REV:
  66       return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
  67    case MESA_FORMAT_YCBCR:
  68       return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
  69    case MESA_FORMAT_RGB_FXT1:
  70    case MESA_FORMAT_RGBA_FXT1:
  71       return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
  72    case MESA_FORMAT_Z16:
  73       if (DepthMode == GL_ALPHA)
  74           return (MAPSURF_16BIT | MT_16BIT_A16);
  75       else if (DepthMode == GL_INTENSITY)
  76           return (MAPSURF_16BIT | MT_16BIT_I16);
  77       else
  78           return (MAPSURF_16BIT | MT_16BIT_L16);
  79    case MESA_FORMAT_RGBA_DXT1:
  80    case MESA_FORMAT_RGB_DXT1:
  81       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
  82    case MESA_FORMAT_RGBA_DXT3:
  83       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
  84    case MESA_FORMAT_RGBA_DXT5:
  85       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
  86    case MESA_FORMAT_S8_Z24:
  87    case MESA_FORMAT_X8_Z24:
  88       if (DepthMode == GL_ALPHA)
  89          return (MAPSURF_32BIT | MT_32BIT_x8A24);
  90       else if (DepthMode == GL_INTENSITY)
  91          return (MAPSURF_32BIT | MT_32BIT_x8I24);
  92       else
  93          return (MAPSURF_32BIT | MT_32BIT_x8L24);
  94    default:
  95       fprintf(stderr, "%s: bad image format %s\n", __FUNCTION__,
  96               _mesa_get_format_name(mesa_format));
  97       abort();
  98       return 0;
  99    }
 100 }
 101
 102
 103
 104
 105 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
 106  * Intel drivers for "other operating systems" implement GL_CLAMP as
 107  * GL_CLAMP_TO_EDGE, so the same is done here.
 108  */
 109 static GLuint
 110 translate_wrap_mode(GLenum wrap)
 111 {
 112    switch (wrap) {
 113    case GL_REPEAT:
 114       return TEXCOORDMODE_WRAP;
 115    case GL_CLAMP:
 116       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
 117    case GL_CLAMP_TO_EDGE:
 118       return TEXCOORDMODE_CLAMP_EDGE;
 119    case GL_CLAMP_TO_BORDER:
 120       return TEXCOORDMODE_CLAMP_BORDER;
 121    case GL_MIRRORED_REPEAT:
 122       return TEXCOORDMODE_MIRROR;
 123    default:
 124       return TEXCOORDMODE_WRAP;
 125    }
 126 }
 127
 128
 129
 130 /* Recalculate all state from scratch.  Perhaps not the most
 131  * efficient, but this has gotten complex enough that we need
 132  * something which is understandable and reliable.
 133  */
 134 static GLboolean
 135 i915_update_tex_unit(struct intel_context *intel, GLuint unit, GLuint ss3)
 136 {
 137    struct gl_context *ctx = &intel->ctx;
 138    struct i915_context *i915 = i915_context(ctx);
 139    struct gl_texture_unit *tUnit = &ctx->Texture.Unit[unit];
 140    struct gl_texture_object *tObj = tUnit->_Current;
 141    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 142    struct gl_texture_image *firstImage;
 143    struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
 144    GLuint *state = i915->state.Tex[unit], format, pitch;
 145    GLint lodbias, aniso = 0;
 146    GLubyte border[4];
 147    GLfloat maxlod;
 148
 149    memset(state, 0, sizeof(state));
 150
 151    /*We need to refcount these. */
 152
 153    if (i915->state.tex_buffer[unit] != NULL) {
 154        drm_intel_bo_unreference(i915->state.tex_buffer[unit]);
 155        i915->state.tex_buffer[unit] = NULL;
 156    }
 157
 158    if (!intel_finalize_mipmap_tree(intel, unit))
 159       return GL_FALSE;
 160
 161    /* Get first image here, since intelObj->firstLevel will get set in
 162     * the intel_finalize_mipmap_tree() call above.
 163     */
 164    firstImage = tObj->Image[0][tObj->BaseLevel];
 165
 166    drm_intel_bo_reference(intelObj->mt->region->buffer);
 167    i915->state.tex_buffer[unit] = intelObj->mt->region->buffer;
 168    i915->state.tex_offset[unit] = 0; /* Always the origin of the miptree */
 169
 170    format = translate_texture_format(firstImage->TexFormat,
 171                                      sampler->DepthMode);
 172    pitch = intelObj->mt->region->pitch * intelObj->mt->cpp;
 173
 174    state[I915_TEXREG_MS3] =
 175       (((firstImage->Height - 1) << MS3_HEIGHT_SHIFT) |
 176        ((firstImage->Width - 1) << MS3_WIDTH_SHIFT) | format);
 177
 178    if (intelObj->mt->region->tiling != I915_TILING_NONE) {
 179       state[I915_TEXREG_MS3] |= MS3_TILED_SURFACE;
 180       if (intelObj->mt->region->tiling == I915_TILING_Y)
 181          state[I915_TEXREG_MS3] |= MS3_TILE_WALK;
 182    }
 183
 184    /* We get one field with fraction bits for the maximum addressable
 185     * (lowest resolution) LOD.  Use it to cover both MAX_LEVEL and
 186     * MAX_LOD.
 187     */
 188    maxlod = MIN2(sampler->MaxLod, tObj->_MaxLevel - tObj->BaseLevel);
 189    state[I915_TEXREG_MS4] =
 190       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT) |
 191        MS4_CUBE_FACE_ENA_MASK |
 192        (U_FIXED(CLAMP(maxlod, 0.0, 11.0), 2) << MS4_MAX_LOD_SHIFT) |
 193        ((firstImage->Depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
 194
 195
 196    {
 197       GLuint minFilt, mipFilt, magFilt;
 198
 199       switch (sampler->MinFilter) {
 200       case GL_NEAREST:
 201          minFilt = FILTER_NEAREST;
 202          mipFilt = MIPFILTER_NONE;
 203          break;
 204       case GL_LINEAR:
 205          minFilt = FILTER_LINEAR;
 206          mipFilt = MIPFILTER_NONE;
 207          break;
 208       case GL_NEAREST_MIPMAP_NEAREST:
 209          minFilt = FILTER_NEAREST;
 210          mipFilt = MIPFILTER_NEAREST;
 211          break;
 212       case GL_LINEAR_MIPMAP_NEAREST:
 213          minFilt = FILTER_LINEAR;
 214          mipFilt = MIPFILTER_NEAREST;
 215          break;
 216       case GL_NEAREST_MIPMAP_LINEAR:
 217          minFilt = FILTER_NEAREST;
 218          mipFilt = MIPFILTER_LINEAR;
 219          break;
 220       case GL_LINEAR_MIPMAP_LINEAR:
 221          minFilt = FILTER_LINEAR;
 222          mipFilt = MIPFILTER_LINEAR;
 223          break;
 224       default:
 225          return GL_FALSE;
 226       }
 227
 228       if (sampler->MaxAnisotropy > 1.0) {
 229          minFilt = FILTER_ANISOTROPIC;
 230          magFilt = FILTER_ANISOTROPIC;
 231          if (sampler->MaxAnisotropy > 2.0)
 232             aniso = SS2_MAX_ANISO_4;
 233          else
 234             aniso = SS2_MAX_ANISO_2;
 235       }
 236       else {
 237          switch (sampler->MagFilter) {
 238          case GL_NEAREST:
 239             magFilt = FILTER_NEAREST;
 240             break;
 241          case GL_LINEAR:
 242             magFilt = FILTER_LINEAR;
 243             break;
 244          default:
 245             return GL_FALSE;
 246          }
 247       }
 248
 249       lodbias = (int) ((tUnit->LodBias + sampler->LodBias) * 16.0);
 250       if (lodbias < -256)
 251           lodbias = -256;
 252       if (lodbias > 255)
 253           lodbias = 255;
 254       state[I915_TEXREG_SS2] = ((lodbias << SS2_LOD_BIAS_SHIFT) &
 255                                 SS2_LOD_BIAS_MASK);
 256
 257       /* YUV conversion:
 258        */
 259       if (firstImage->TexFormat == MESA_FORMAT_YCBCR ||
 260           firstImage->TexFormat == MESA_FORMAT_YCBCR_REV)
 261          state[I915_TEXREG_SS2] |= SS2_COLORSPACE_CONVERSION;
 262
 263       /* Shadow:
 264        */
 265       if (sampler->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB &&
 266           tObj->Target != GL_TEXTURE_3D) {
 267          if (tObj->Target == GL_TEXTURE_1D)
 268             return GL_FALSE;
 269
 270          state[I915_TEXREG_SS2] |=
 271             (SS2_SHADOW_ENABLE |
 272              intel_translate_shadow_compare_func(sampler->CompareFunc));
 273
 274          minFilt = FILTER_4X4_FLAT;
 275          magFilt = FILTER_4X4_FLAT;
 276       }
 277
 278       state[I915_TEXREG_SS2] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 279                                  (mipFilt << SS2_MIP_FILTER_SHIFT) |
 280                                  (magFilt << SS2_MAG_FILTER_SHIFT) |
 281                                  aniso);
 282    }
 283
 284    {
 285       GLenum ws = sampler->WrapS;
 286       GLenum wt = sampler->WrapT;
 287       GLenum wr = sampler->WrapR;
 288       float minlod;
 289
 290       /* We program 1D textures as 2D textures, so the 2D texcoord could
 291        * result in sampling border values if we don't set the T wrap to
 292        * repeat.
 293        */
 294       if (tObj->Target == GL_TEXTURE_1D)
 295          wt = GL_REPEAT;
 296
 297       /* 3D textures don't seem to respect the border color.
 298        * Fallback if there's ever a danger that they might refer to
 299        * it.
 300        *
 301        * Effectively this means fallback on 3D clamp or
 302        * clamp_to_border.
 303        */
 304       if (tObj->Target == GL_TEXTURE_3D &&
 305           (sampler->MinFilter != GL_NEAREST ||
 306            sampler->MagFilter != GL_NEAREST) &&
 307           (ws == GL_CLAMP ||
 308            wt == GL_CLAMP ||
 309            wr == GL_CLAMP ||
 310            ws == GL_CLAMP_TO_BORDER ||
 311            wt == GL_CLAMP_TO_BORDER || wr == GL_CLAMP_TO_BORDER))
 312          return GL_FALSE;
 313
 314       /* Only support TEXCOORDMODE_CLAMP_EDGE and TEXCOORDMODE_CUBE (not
 315        * used) when using cube map texture coordinates
 316        */
 317       if (tObj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 318           (((ws != GL_CLAMP) && (ws != GL_CLAMP_TO_EDGE)) ||
 319            ((wt != GL_CLAMP) && (wt != GL_CLAMP_TO_EDGE))))
 320           return GL_FALSE;
 321
 322       state[I915_TEXREG_SS3] = ss3;     /* SS3_NORMALIZED_COORDS */
 323
 324       state[I915_TEXREG_SS3] |=
 325          ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 326           (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 327           (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 328
 329       minlod = MIN2(sampler->MinLod, tObj->_MaxLevel - tObj->BaseLevel);
 330       state[I915_TEXREG_SS3] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
 331       state[I915_TEXREG_SS3] |= (U_FIXED(CLAMP(minlod, 0.0, 11.0), 4) <<
 332                                  SS3_MIN_LOD_SHIFT);
 333
 334    }
 335
 336    /* convert border color from float to ubyte */
 337    CLAMPED_FLOAT_TO_UBYTE(border[0], sampler->BorderColor.f[0]);
 338    CLAMPED_FLOAT_TO_UBYTE(border[1], sampler->BorderColor.f[1]);
 339    CLAMPED_FLOAT_TO_UBYTE(border[2], sampler->BorderColor.f[2]);
 340    CLAMPED_FLOAT_TO_UBYTE(border[3], sampler->BorderColor.f[3]);
 341
 342    if (firstImage->_BaseFormat == GL_DEPTH_COMPONENT) {
 343       /* GL specs that border color for depth textures is taken from the
 344        * R channel, while the hardware uses A.  Spam R into all the channels
 345        * for safety.
 346        */
 347       state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[0],
 348                                                border[0],
 349                                                border[0],
 350                                                border[0]);
 351    } else {
 352       state[I915_TEXREG_SS4] = PACK_COLOR_8888(border[3],
 353                                                border[0],
 354                                                border[1],
 355                                                border[2]);
 356    }
 357
 358
 359    I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(unit), GL_TRUE);
 360    /* memcmp was already disabled, but definitely won't work as the
 361     * region might now change and that wouldn't be detected:
 362     */
 363    I915_STATECHANGE(i915, I915_UPLOAD_TEX(unit));
 364
 365
 366 #if 0
 367    DBG(TEXTURE, "state[I915_TEXREG_SS2] = 0x%x\n", state[I915_TEXREG_SS2]);
 368    DBG(TEXTURE, "state[I915_TEXREG_SS3] = 0x%x\n", state[I915_TEXREG_SS3]);
 369    DBG(TEXTURE, "state[I915_TEXREG_SS4] = 0x%x\n", state[I915_TEXREG_SS4]);
 370    DBG(TEXTURE, "state[I915_TEXREG_MS2] = 0x%x\n", state[I915_TEXREG_MS2]);
 371    DBG(TEXTURE, "state[I915_TEXREG_MS3] = 0x%x\n", state[I915_TEXREG_MS3]);
 372    DBG(TEXTURE, "state[I915_TEXREG_MS4] = 0x%x\n", state[I915_TEXREG_MS4]);
 373 #endif
 374
 375    return GL_TRUE;
 376 }
 377
 378
 379
 380
 381 void
 382 i915UpdateTextureState(struct intel_context *intel)
 383 {
 384    GLboolean ok = GL_TRUE;
 385    GLuint i;
 386
 387    for (i = 0; i < I915_TEX_UNITS && ok; i++) {
 388       switch (intel->ctx.Texture.Unit[i]._ReallyEnabled) {
 389       case TEXTURE_1D_BIT:
 390       case TEXTURE_2D_BIT:
 391       case TEXTURE_CUBE_BIT:
 392       case TEXTURE_3D_BIT:
 393          ok = i915_update_tex_unit(intel, i, SS3_NORMALIZED_COORDS);
 394          break;
 395       case TEXTURE_RECT_BIT:
 396          ok = i915_update_tex_unit(intel, i, 0);
 397          break;
 398       case 0:{
 399             struct i915_context *i915 = i915_context(&intel->ctx);
 400             if (i915->state.active & I915_UPLOAD_TEX(i))
 401                I915_ACTIVESTATE(i915, I915_UPLOAD_TEX(i), GL_FALSE);
 402
 403             if (i915->state.tex_buffer[i] != NULL) {
 404                drm_intel_bo_unreference(i915->state.tex_buffer[i]);
 405                i915->state.tex_buffer[i] = NULL;
 406             }
 407
 408             break;
 409          }
 410       default:
 411          ok = GL_FALSE;
 412          break;
 413       }
 414    }
 415
 416    FALLBACK(intel, I915_FALLBACK_TEXTURE, !ok);
 417 }