src/mesa/drivers/dri/i810/i810tex.c

   1 /*
   2  * GLX Hardware Device Driver for Intel i810
   3  * Copyright (C) 1999 Keith Whitwell
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included
  13  * in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
  21  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  */
  24 /* $XFree86: xc/lib/GL/mesa/src/drv/i810/i810tex.c,v 1.9 2002/10/30 12:51:33 alanh Exp $ */
  25
  26 #include "glheader.h"
  27 #include "mtypes.h"
  28 #include "imports.h"
  29 #include "simple_list.h"
  30 #include "enums.h"
  31 #include "texstore.h"
  32 #include "texformat.h"
  33 #include "teximage.h"
  34 #include "texmem.h"
  35 #include "texobj.h"
  36 #include "swrast/swrast.h"
  37 #include "colormac.h"
  38 #include "texobj.h"
  39 #include "mm.h"
  40
  41 #include "i810screen.h"
  42 #include "i810_dri.h"
  43
  44 #include "i810context.h"
  45 #include "i810tex.h"
  46 #include "i810state.h"
  47 #include "i810ioctl.h"
  48
  49
  50 /*
  51  * Compute the 'S2.4' lod bias factor from the floating point OpenGL bias.
  52  */
  53 static GLuint i810ComputeLodBias(GLfloat bias)
  54 {
  55    int b = (int) (bias * 16.0) + 12;
  56    if (b > 63)
  57       b = 63;
  58    else if (b < -64)
  59       b = -64;
  60    return (GLuint) (b & MLC_LOD_BIAS_MASK);
  61 }
  62
  63
  64 static void i810SetTexWrapping(i810TextureObjectPtr tex,
  65                                GLenum swrap, GLenum twrap)
  66 {
  67    tex->Setup[I810_TEXREG_MCS] &= ~(MCS_U_STATE_MASK| MCS_V_STATE_MASK);
  68
  69    switch( swrap ) {
  70    case GL_REPEAT:
  71       tex->Setup[I810_TEXREG_MCS] |= MCS_U_WRAP;
  72       break;
  73    case GL_CLAMP:
  74    case GL_CLAMP_TO_EDGE:
  75       tex->Setup[I810_TEXREG_MCS] |= MCS_U_CLAMP;
  76       break;
  77    case GL_MIRRORED_REPEAT:
  78       tex->Setup[I810_TEXREG_MCS] |= MCS_U_MIRROR;
  79       break;
  80    default:
  81       _mesa_problem(NULL, "bad S wrap mode in %s", __FUNCTION__);
  82    }
  83
  84    switch( twrap ) {
  85    case GL_REPEAT:
  86       tex->Setup[I810_TEXREG_MCS] |= MCS_V_WRAP;
  87       break;
  88    case GL_CLAMP:
  89    case GL_CLAMP_TO_EDGE:
  90       tex->Setup[I810_TEXREG_MCS] |= MCS_V_CLAMP;
  91       break;
  92    case GL_MIRRORED_REPEAT:
  93       tex->Setup[I810_TEXREG_MCS] |= MCS_V_MIRROR;
  94       break;
  95    default:
  96       _mesa_problem(NULL, "bad T wrap mode in %s", __FUNCTION__);
  97    }
  98 }
  99
 100
 101 static void i810SetTexFilter(i810ContextPtr imesa,
 102                              i810TextureObjectPtr t,
 103                              GLenum minf, GLenum magf,
 104                              GLfloat bias)
 105 {
 106    t->Setup[I810_TEXREG_MF] &= ~(MF_MIN_MASK|
 107                                  MF_MAG_MASK|
 108                                  MF_MIP_MASK);
 109    t->Setup[I810_TEXREG_MLC] &= ~(MLC_LOD_BIAS_MASK);
 110
 111    switch (minf) {
 112    case GL_NEAREST:
 113       t->Setup[I810_TEXREG_MF] |= MF_MIN_NEAREST | MF_MIP_NONE;
 114       break;
 115    case GL_LINEAR:
 116       t->Setup[I810_TEXREG_MF] |= MF_MIN_LINEAR | MF_MIP_NONE;
 117       break;
 118    case GL_NEAREST_MIPMAP_NEAREST:
 119       t->Setup[I810_TEXREG_MF] |= MF_MIN_NEAREST | MF_MIP_NEAREST;
 120       if (magf == GL_LINEAR) {
 121          /*bias -= 0.5;*/  /* this doesn't work too good */
 122       }
 123       break;
 124    case GL_LINEAR_MIPMAP_NEAREST:
 125       t->Setup[I810_TEXREG_MF] |= MF_MIN_LINEAR | MF_MIP_NEAREST;
 126       break;
 127    case GL_NEAREST_MIPMAP_LINEAR:
 128       if (IS_I815(imesa))
 129          t->Setup[I810_TEXREG_MF] |= MF_MIN_NEAREST | MF_MIP_LINEAR;
 130       else
 131          t->Setup[I810_TEXREG_MF] |= MF_MIN_NEAREST | MF_MIP_DITHER;
 132       /*
 133       if (magf == GL_LINEAR) {
 134          bias -= 0.5;
 135       }
 136       */
 137       bias -= 0.5; /* always biasing here looks better */
 138       break;
 139    case GL_LINEAR_MIPMAP_LINEAR:
 140       if (IS_I815(imesa))
 141          t->Setup[I810_TEXREG_MF] |= MF_MIN_LINEAR | MF_MIP_LINEAR;
 142       else
 143          t->Setup[I810_TEXREG_MF] |= MF_MIN_LINEAR | MF_MIP_DITHER;
 144       break;
 145    default:
 146       return;
 147    }
 148
 149    switch (magf) {
 150    case GL_NEAREST:
 151       t->Setup[I810_TEXREG_MF] |= MF_MAG_NEAREST;
 152       break;
 153    case GL_LINEAR:
 154       t->Setup[I810_TEXREG_MF] |= MF_MAG_LINEAR;
 155       break;
 156    default:
 157       return;
 158    }
 159
 160    t->Setup[I810_TEXREG_MLC] |= i810ComputeLodBias(bias);
 161 }
 162
 163
 164 static void
 165 i810SetTexBorderColor( i810TextureObjectPtr t, GLubyte color[4] )
 166 {
 167    /* Need a fallback.
 168     */
 169 }
 170
 171
 172 static i810TextureObjectPtr
 173 i810AllocTexObj( GLcontext *ctx, struct gl_texture_object *texObj )
 174 {
 175    i810TextureObjectPtr t;
 176    i810ContextPtr imesa = I810_CONTEXT(ctx);
 177
 178    t = CALLOC_STRUCT( i810_texture_object_t );
 179    texObj->DriverData = t;
 180    if ( t != NULL ) {
 181       GLfloat bias = ctx->Texture.Unit[ctx->Texture.CurrentUnit].LodBias;
 182       /* Initialize non-image-dependent parts of the state:
 183        */
 184       t->base.tObj = texObj;
 185       t->Setup[I810_TEXREG_MI0] = GFX_OP_MAP_INFO;
 186       t->Setup[I810_TEXREG_MI1] = MI1_MAP_0;
 187       t->Setup[I810_TEXREG_MI2] = MI2_DIMENSIONS_ARE_LOG2;
 188       t->Setup[I810_TEXREG_MLC] = (GFX_OP_MAP_LOD_CTL |
 189                                    MLC_MAP_0 |
 190                                    /*MLC_DITHER_WEIGHT_FULL |*/
 191                                    MLC_DITHER_WEIGHT_12 |
 192                                    MLC_UPDATE_LOD_BIAS |
 193                                    0x0);
 194       t->Setup[I810_TEXREG_MCS] = (GFX_OP_MAP_COORD_SETS |
 195                                    MCS_COORD_0 |
 196                                    MCS_UPDATE_NORMALIZED |
 197                                    MCS_NORMALIZED_COORDS |
 198                                    MCS_UPDATE_V_STATE |
 199                                    MCS_V_WRAP |
 200                                    MCS_UPDATE_U_STATE |
 201                                    MCS_U_WRAP);
 202       t->Setup[I810_TEXREG_MF] = (GFX_OP_MAP_FILTER |
 203                                   MF_MAP_0 |
 204                                   MF_UPDATE_ANISOTROPIC |
 205                                   MF_UPDATE_MIP_FILTER |
 206                                   MF_UPDATE_MAG_FILTER |
 207                                   MF_UPDATE_MIN_FILTER);
 208
 209       make_empty_list( & t->base );
 210
 211       i810SetTexWrapping( t, texObj->WrapS, texObj->WrapT );
 212       /*i830SetTexMaxAnisotropy( t, texObj->MaxAnisotropy );*/
 213       i810SetTexFilter( imesa, t, texObj->MinFilter, texObj->MagFilter, bias );
 214       i810SetTexBorderColor( t, texObj->_BorderChan );
 215    }
 216
 217    return t;
 218 }
 219
 220
 221 static void i810TexParameter( GLcontext *ctx, GLenum target,
 222                               struct gl_texture_object *tObj,
 223                               GLenum pname, const GLfloat *params )
 224 {
 225    i810ContextPtr imesa = I810_CONTEXT(ctx);
 226    i810TextureObjectPtr t = (i810TextureObjectPtr) tObj->DriverData;
 227
 228    if (!t)
 229       return;
 230
 231    if ( target != GL_TEXTURE_2D )
 232       return;
 233
 234    /* Can't do the update now as we don't know whether to flush
 235     * vertices or not.  Setting imesa->new_state means that
 236     * i810UpdateTextureState() will be called before any triangles are
 237     * rendered.  If a statechange has occurred, it will be detected at
 238     * that point, and buffered vertices flushed.
 239     */
 240    switch (pname) {
 241    case GL_TEXTURE_MIN_FILTER:
 242    case GL_TEXTURE_MAG_FILTER:
 243       {
 244          GLfloat bias = ctx->Texture.Unit[ctx->Texture.CurrentUnit].LodBias;
 245          i810SetTexFilter( imesa, t, tObj->MinFilter, tObj->MagFilter, bias );
 246       }
 247       break;
 248
 249    case GL_TEXTURE_WRAP_S:
 250    case GL_TEXTURE_WRAP_T:
 251       i810SetTexWrapping( t, tObj->WrapS, tObj->WrapT );
 252       break;
 253
 254    case GL_TEXTURE_BORDER_COLOR:
 255       i810SetTexBorderColor( t, tObj->_BorderChan );
 256       break;
 257
 258    case GL_TEXTURE_BASE_LEVEL:
 259    case GL_TEXTURE_MAX_LEVEL:
 260    case GL_TEXTURE_MIN_LOD:
 261    case GL_TEXTURE_MAX_LOD:
 262       /* This isn't the most efficient solution but there doesn't appear to
 263        * be a nice alternative for Radeon.  Since there's no LOD clamping,
 264        * we just have to rely on loading the right subset of mipmap levels
 265        * to simulate a clamped LOD.
 266        */
 267       I810_FIREVERTICES( I810_CONTEXT(ctx) );
 268       driSwapOutTextureObject( (driTextureObject *) t );
 269       break;
 270
 271    default:
 272       return;
 273    }
 274
 275    if (t == imesa->CurrentTexObj[0]) {
 276       I810_STATECHANGE( imesa, I810_UPLOAD_TEX0 );
 277    }
 278
 279    if (t == imesa->CurrentTexObj[1]) {
 280       I810_STATECHANGE( imesa, I810_UPLOAD_TEX1 );
 281    }
 282 }
 283
 284
 285 /**
 286  * Setup hardware bits for new texture environment settings.
 287  *
 288  * \todo
 289  * Determine whether or not \c param can be used instead of
 290  * \c texUnit->EnvColor in the \c GL_TEXTURE_ENV_COLOR case.
 291  */
 292 static void i810TexEnv( GLcontext *ctx, GLenum target,
 293                         GLenum pname, const GLfloat *param )
 294 {
 295    i810ContextPtr imesa = I810_CONTEXT( ctx );
 296    const GLuint unit = ctx->Texture.CurrentUnit;
 297    const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
 298
 299    /* Only one env color.  Need a fallback if env colors are different
 300     * and texture setup references env color in both units.
 301     */
 302    switch (pname) {
 303    case GL_TEXTURE_ENV_COLOR: {
 304       GLubyte c[4];
 305       GLuint envColor;
 306
 307       UNCLAMPED_FLOAT_TO_RGBA_CHAN( c, texUnit->EnvColor );
 308       envColor = PACK_COLOR_8888( c[3], c[0], c[1], c[2] );
 309
 310       if (imesa->Setup[I810_CTXREG_CF1] != envColor) {
 311          I810_STATECHANGE(imesa, I810_UPLOAD_CTX);
 312          imesa->Setup[I810_CTXREG_CF1] = envColor;
 313       }
 314       break;
 315    }
 316
 317    case GL_TEXTURE_ENV_MODE:
 318       imesa->TexEnvImageFmt[unit] = 0; /* force recalc of env state */
 319       break;
 320
 321    case GL_TEXTURE_LOD_BIAS: {
 322       if ( texUnit->_Current != NULL ) {
 323          const struct gl_texture_object *tObj = texUnit->_Current;
 324          i810TextureObjectPtr t = (i810TextureObjectPtr) tObj->DriverData;
 325
 326          t->Setup[I810_TEXREG_MLC] &= ~(MLC_LOD_BIAS_MASK);
 327          t->Setup[I810_TEXREG_MLC] |= i810ComputeLodBias(*param);
 328       }
 329       break;
 330    }
 331
 332    default:
 333       break;
 334    }
 335 }
 336
 337
 338
 339 #if 0
 340 static void i810TexImage1D( GLcontext *ctx, GLenum target, GLint level,
 341                             GLint internalFormat,
 342                             GLint width, GLint border,
 343                             GLenum format, GLenum type,
 344                             const GLvoid *pixels,
 345                             const struct gl_pixelstore_attrib *pack,
 346                             struct gl_texture_object *texObj,
 347                             struct gl_texture_image *texImage )
 348 {
 349    i810TextureObjectPtr t = (i810TextureObjectPtr) texObj->DriverData;
 350    if (t) {
 351       i810SwapOutTexObj( imesa, t );
 352    }
 353 }
 354
 355 static void i810TexSubImage1D( GLcontext *ctx,
 356                                GLenum target,
 357                                GLint level,
 358                                GLint xoffset,
 359                                GLsizei width,
 360                                GLenum format, GLenum type,
 361                                const GLvoid *pixels,
 362                                const struct gl_pixelstore_attrib *pack,
 363                                struct gl_texture_object *texObj,
 364                                struct gl_texture_image *texImage )
 365 {
 366 }
 367 #endif
 368
 369
 370 static void i810TexImage2D( GLcontext *ctx, GLenum target, GLint level,
 371                             GLint internalFormat,
 372                             GLint width, GLint height, GLint border,
 373                             GLenum format, GLenum type, const GLvoid *pixels,
 374                             const struct gl_pixelstore_attrib *packing,
 375                             struct gl_texture_object *texObj,
 376                             struct gl_texture_image *texImage )
 377 {
 378    driTextureObject *t = (driTextureObject *) texObj->DriverData;
 379    if (t) {
 380       I810_FIREVERTICES( I810_CONTEXT(ctx) );
 381       driSwapOutTextureObject( t );
 382    }
 383    else {
 384       t = (driTextureObject *) i810AllocTexObj( ctx, texObj );
 385       if (!t) {
 386          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage2D");
 387          return;
 388       }
 389    }
 390    _mesa_store_teximage2d( ctx, target, level, internalFormat,
 391                            width, height, border, format, type,
 392                            pixels, packing, texObj, texImage );
 393 }
 394
 395 static void i810TexSubImage2D( GLcontext *ctx,
 396                                GLenum target,
 397                                GLint level,
 398                                GLint xoffset, GLint yoffset,
 399                                GLsizei width, GLsizei height,
 400                                GLenum format, GLenum type,
 401                                const GLvoid *pixels,
 402                                const struct gl_pixelstore_attrib *packing,
 403                                struct gl_texture_object *texObj,
 404                                struct gl_texture_image *texImage )
 405 {
 406    driTextureObject *t = (driTextureObject *)texObj->DriverData;
 407    if (t) {
 408      I810_FIREVERTICES( I810_CONTEXT(ctx) );
 409      driSwapOutTextureObject( t );
 410    }
 411    _mesa_store_texsubimage2d(ctx, target, level, xoffset, yoffset, width,
 412                              height, format, type, pixels, packing, texObj,
 413                              texImage);
 414 }
 415
 416
 417 static void i810BindTexture( GLcontext *ctx, GLenum target,
 418                              struct gl_texture_object *tObj )
 419 {
 420    assert( (target != GL_TEXTURE_2D) || (tObj->DriverData != NULL) );
 421 }
 422
 423
 424 static void i810DeleteTexture( GLcontext *ctx, struct gl_texture_object *tObj )
 425 {
 426    driTextureObject * t = (driTextureObject *) tObj->DriverData;
 427    if (t) {
 428       i810ContextPtr imesa = I810_CONTEXT( ctx );
 429       if (imesa)
 430          I810_FIREVERTICES( imesa );
 431       driDestroyTextureObject( t );
 432    }
 433    /* Free mipmap images and the texture object itself */
 434    _mesa_delete_texture_object(ctx, tObj);
 435 }
 436
 437 /**
 438  * Choose a Mesa texture format to match the requested format.
 439  *
 440  * The i810 only supports 5 texture modes that are useful to Mesa.  That
 441  * makes this routine pretty simple.
 442  */
 443 static const struct gl_texture_format *
 444 i810ChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
 445                          GLenum format, GLenum type )
 446 {
 447    switch ( internalFormat ) {
 448    case 4:
 449    case GL_RGBA:
 450    case GL_RGBA2:
 451    case GL_RGBA4:
 452    case GL_RGB5_A1:
 453    case GL_RGBA8:
 454    case GL_RGB10_A2:
 455    case GL_RGBA12:
 456    case GL_RGBA16:
 457    case GL_COMPRESSED_RGBA:
 458       if ( (format == GL_BGRA) && (type == GL_UNSIGNED_SHORT_1_5_5_5_REV)
 459            || (format == GL_RGBA) && (type == GL_UNSIGNED_SHORT_5_5_5_1)
 460            || (internalFormat == GL_RGB5_A1) ) {
 461          return &_mesa_texformat_argb1555;
 462       }
 463       return &_mesa_texformat_argb4444;
 464
 465    case 3:
 466    case GL_RGB:
 467    case GL_COMPRESSED_RGB:
 468    case GL_R3_G3_B2:
 469    case GL_RGB4:
 470    case GL_RGB5:
 471    case GL_RGB8:
 472    case GL_RGB10:
 473    case GL_RGB12:
 474    case GL_RGB16:
 475       return &_mesa_texformat_rgb565;
 476
 477    case GL_ALPHA:
 478    case GL_ALPHA4:
 479    case GL_ALPHA8:
 480    case GL_ALPHA12:
 481    case GL_ALPHA16:
 482    case GL_COMPRESSED_ALPHA:
 483    case 1:
 484    case GL_LUMINANCE:
 485    case GL_LUMINANCE4:
 486    case GL_LUMINANCE8:
 487    case GL_LUMINANCE12:
 488    case GL_LUMINANCE16:
 489    case GL_COMPRESSED_LUMINANCE:
 490    case 2:
 491    case GL_LUMINANCE_ALPHA:
 492    case GL_LUMINANCE4_ALPHA4:
 493    case GL_LUMINANCE6_ALPHA2:
 494    case GL_LUMINANCE8_ALPHA8:
 495    case GL_LUMINANCE12_ALPHA4:
 496    case GL_LUMINANCE12_ALPHA12:
 497    case GL_LUMINANCE16_ALPHA16:
 498    case GL_COMPRESSED_LUMINANCE_ALPHA:
 499    case GL_INTENSITY:
 500    case GL_INTENSITY4:
 501    case GL_INTENSITY8:
 502    case GL_INTENSITY12:
 503    case GL_INTENSITY16:
 504    case GL_COMPRESSED_INTENSITY:
 505       return &_mesa_texformat_al88;
 506
 507    case GL_YCBCR_MESA:
 508       if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
 509           type == GL_UNSIGNED_BYTE)
 510          return &_mesa_texformat_ycbcr;
 511       else
 512          return &_mesa_texformat_ycbcr_rev;
 513
 514    default:
 515       fprintf(stderr, "unexpected texture format in %s\n", __FUNCTION__);
 516       return NULL;
 517    }
 518
 519    return NULL; /* never get here */
 520 }
 521
 522 /**
 523  * Allocate a new texture object.
 524  * Called via ctx->Driver.NewTextureObject.
 525  * Note: this function will be called during context creation to
 526  * allocate the default texture objects.
 527  * Note: we could use containment here to 'derive' the driver-specific
 528  * texture object from the core mesa gl_texture_object.  Not done at this time.
 529  */
 530 static struct gl_texture_object *
 531 i810NewTextureObject( GLcontext *ctx, GLuint name, GLenum target )
 532 {
 533    struct gl_texture_object *obj;
 534    obj = _mesa_new_texture_object(ctx, name, target);
 535    i810AllocTexObj( ctx, obj );
 536    return obj;
 537 }
 538
 539 void i810InitTextureFuncs( struct dd_function_table *functions )
 540 {
 541    functions->ChooseTextureFormat = i810ChooseTextureFormat;
 542    functions->TexImage2D = i810TexImage2D;
 543    functions->TexSubImage2D = i810TexSubImage2D;
 544    functions->BindTexture = i810BindTexture;
 545    functions->NewTextureObject = i810NewTextureObject;
 546    functions->DeleteTexture = i810DeleteTexture;
 547    functions->TexParameter = i810TexParameter;
 548    functions->TexEnv = i810TexEnv;
 549    functions->IsTextureResident = driIsTextureResident;
 550 }