src/mesa/drivers/dri/mga/mgatex.c

   1 /*
   2  * Copyright 2000-2001 VA Linux Systems, Inc.
   3  * All Rights Reserved.
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28 #include "main/glheader.h"
  29 #include "main/mm.h"
  30 #include "mgacontext.h"
  31 #include "mgatex.h"
  32 #include "mgaregs.h"
  33 #include "mgatris.h"
  34 #include "mgaioctl.h"
  35
  36 #include "main/colormac.h"
  37 #include "main/context.h"
  38 #include "main/enums.h"
  39 #include "main/simple_list.h"
  40 #include "main/imports.h"
  41 #include "main/macros.h"
  42 #include "main/texformat.h"
  43 #include "main/texstore.h"
  44 #include "main/teximage.h"
  45 #include "main/texobj.h"
  46
  47 #include "swrast/swrast.h"
  48
  49 #include "xmlpool.h"
  50
  51 /**
  52  * Set the texture wrap modes.
  53  * Currently \c GL_REPEAT, \c GL_CLAMP and \c GL_CLAMP_TO_EDGE are supported.
  54  *
  55  * \param t Texture object whose wrap modes are to be set
  56  * \param swrap Wrap mode for the \a s texture coordinate
  57  * \param twrap Wrap mode for the \a t texture coordinate
  58  */
  59
  60 static void
  61 mgaSetTexWrapping( mgaTextureObjectPtr t, GLenum swrap, GLenum twrap )
  62 {
  63    GLboolean  is_clamp = GL_FALSE;
  64    GLboolean  is_clamp_to_edge = GL_FALSE;
  65
  66    t->setup.texctl &= (TMC_clampu_MASK & TMC_clampv_MASK);
  67    t->setup.texctl2 &= (TMC_borderen_MASK);
  68
  69    switch( swrap ) {
  70    case GL_REPEAT:
  71       break;
  72    case GL_CLAMP:
  73       t->setup.texctl |= TMC_clampu_enable;
  74       is_clamp = GL_TRUE;
  75       break;
  76    case GL_CLAMP_TO_EDGE:
  77       t->setup.texctl |= TMC_clampu_enable;
  78       is_clamp_to_edge = GL_TRUE;
  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       break;
  87    case GL_CLAMP:
  88       t->setup.texctl |= TMC_clampv_enable;
  89       is_clamp = GL_TRUE;
  90       break;
  91    case GL_CLAMP_TO_EDGE:
  92       t->setup.texctl |= TMC_clampv_enable;
  93       is_clamp_to_edge = GL_TRUE;
  94       break;
  95    default:
  96       _mesa_problem(NULL, "bad T wrap mode in %s", __FUNCTION__);
  97    }
  98
  99    if ( is_clamp ) {
 100       t->setup.texctl2 |= TMC_borderen_enable;
 101    }
 102
 103    t->border_fallback = (is_clamp && is_clamp_to_edge);
 104 }
 105
 106
 107 /**
 108  * Set the texture magnification and minification modes.
 109  *
 110  * \param t Texture whose filter modes are to be set
 111  * \param minf Texture minification mode
 112  * \param magf Texture magnification mode
 113  */
 114
 115 static void
 116 mgaSetTexFilter( mgaTextureObjectPtr t, GLenum minf, GLenum magf )
 117 {
 118    GLuint val = 0;
 119
 120    switch (minf) {
 121    case GL_NEAREST: val = TF_minfilter_nrst; break;
 122    case GL_LINEAR: val = TF_minfilter_bilin; break;
 123    case GL_NEAREST_MIPMAP_NEAREST: val = TF_minfilter_mm1s; break;
 124    case GL_LINEAR_MIPMAP_NEAREST: val = TF_minfilter_mm4s; break;
 125    case GL_NEAREST_MIPMAP_LINEAR: val = TF_minfilter_mm2s; break;
 126    case GL_LINEAR_MIPMAP_LINEAR: val = TF_minfilter_mm8s; break;
 127    default: val = TF_minfilter_nrst; break;
 128    }
 129
 130    switch (magf) {
 131    case GL_NEAREST: val |= TF_magfilter_nrst; break;
 132    case GL_LINEAR: val |= TF_magfilter_bilin; break;
 133    default: val |= TF_magfilter_nrst; break;
 134    }
 135
 136    /* See OpenGL 1.2 specification */
 137    if (magf == GL_LINEAR && (minf == GL_NEAREST_MIPMAP_NEAREST ||
 138                              minf == GL_NEAREST_MIPMAP_LINEAR)) {
 139       val |= MGA_FIELD( TF_fthres, 0x20 ); /* c = 0.5 */
 140    } else {
 141       val |= MGA_FIELD( TF_fthres, 0x10 ); /* c = 0 */
 142    }
 143
 144
 145    /* Mask off the bits for the fields we are setting.  Remember, the MGA mask
 146     * defines have 0s for the bits in the named fields.  This is the opposite
 147     * of most of the other drivers.
 148     */
 149
 150    t->setup.texfilter &= (TF_minfilter_MASK &
 151                           TF_magfilter_MASK &
 152                           TF_fthres_MASK);
 153    t->setup.texfilter |= val;
 154 }
 155
 156 static void mgaSetTexBorderColor(mgaTextureObjectPtr t, GLubyte color[4])
 157 {
 158    t->setup.texbordercol = PACK_COLOR_8888(color[3], color[0],
 159                                            color[1], color[2] );
 160 }
 161
 162
 163 static const struct gl_texture_format *
 164 mgaChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
 165                         GLenum format, GLenum type )
 166 {
 167    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 168    const GLboolean do32bpt =
 169        ( mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_32 );
 170    const GLboolean force16bpt =
 171        ( mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FORCE_16 );
 172    (void) format;
 173
 174    switch ( internalFormat ) {
 175    case 4:
 176    case GL_RGBA:
 177    case GL_COMPRESSED_RGBA:
 178       switch ( type ) {
 179       case GL_UNSIGNED_INT_10_10_10_2:
 180       case GL_UNSIGNED_INT_2_10_10_10_REV:
 181          return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb1555;
 182       case GL_UNSIGNED_SHORT_4_4_4_4:
 183       case GL_UNSIGNED_SHORT_4_4_4_4_REV:
 184          return &_mesa_texformat_argb4444;
 185       case GL_UNSIGNED_SHORT_5_5_5_1:
 186       case GL_UNSIGNED_SHORT_1_5_5_5_REV:
 187          return &_mesa_texformat_argb1555;
 188       default:
 189          return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;
 190       }
 191
 192    case 3:
 193    case GL_RGB:
 194    case GL_COMPRESSED_RGB:
 195       switch ( type ) {
 196       case GL_UNSIGNED_SHORT_4_4_4_4:
 197       case GL_UNSIGNED_SHORT_4_4_4_4_REV:
 198          return &_mesa_texformat_argb4444;
 199       case GL_UNSIGNED_SHORT_5_5_5_1:
 200       case GL_UNSIGNED_SHORT_1_5_5_5_REV:
 201          return &_mesa_texformat_argb1555;
 202       case GL_UNSIGNED_SHORT_5_6_5:
 203       case GL_UNSIGNED_SHORT_5_6_5_REV:
 204          return &_mesa_texformat_rgb565;
 205       default:
 206          return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_rgb565;
 207       }
 208
 209    case GL_RGBA8:
 210    case GL_RGB10_A2:
 211    case GL_RGBA12:
 212    case GL_RGBA16:
 213       return !force16bpt ?
 214           &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;
 215
 216    case GL_RGBA4:
 217    case GL_RGBA2:
 218       return &_mesa_texformat_argb4444;
 219
 220    case GL_RGB5_A1:
 221       return &_mesa_texformat_argb1555;
 222
 223    case GL_RGB8:
 224    case GL_RGB10:
 225    case GL_RGB12:
 226    case GL_RGB16:
 227       return !force16bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_rgb565;
 228
 229    case GL_RGB5:
 230    case GL_RGB4:
 231    case GL_R3_G3_B2:
 232       return &_mesa_texformat_rgb565;
 233
 234    case GL_ALPHA:
 235    case GL_ALPHA4:
 236    case GL_ALPHA8:
 237    case GL_ALPHA12:
 238    case GL_ALPHA16:
 239    case GL_COMPRESSED_ALPHA:
 240       /* FIXME: This will report incorrect component sizes... */
 241       return MGA_IS_G400(mmesa) ? &_mesa_texformat_al88 : &_mesa_texformat_argb4444;
 242
 243    case 1:
 244    case GL_LUMINANCE:
 245    case GL_LUMINANCE4:
 246    case GL_LUMINANCE8:
 247    case GL_LUMINANCE12:
 248    case GL_LUMINANCE16:
 249    case GL_COMPRESSED_LUMINANCE:
 250       /* FIXME: This will report incorrect component sizes... */
 251       return MGA_IS_G400(mmesa) ? &_mesa_texformat_al88 : &_mesa_texformat_rgb565;
 252
 253    case 2:
 254    case GL_LUMINANCE_ALPHA:
 255    case GL_LUMINANCE4_ALPHA4:
 256    case GL_LUMINANCE6_ALPHA2:
 257    case GL_LUMINANCE8_ALPHA8:
 258    case GL_LUMINANCE12_ALPHA4:
 259    case GL_LUMINANCE12_ALPHA12:
 260    case GL_LUMINANCE16_ALPHA16:
 261    case GL_COMPRESSED_LUMINANCE_ALPHA:
 262       /* FIXME: This will report incorrect component sizes... */
 263       return MGA_IS_G400(mmesa) ? &_mesa_texformat_al88 : &_mesa_texformat_argb4444;
 264
 265    case GL_INTENSITY:
 266    case GL_INTENSITY4:
 267    case GL_INTENSITY8:
 268    case GL_INTENSITY12:
 269    case GL_INTENSITY16:
 270    case GL_COMPRESSED_INTENSITY:
 271       /* FIXME: This will report incorrect component sizes... */
 272       return MGA_IS_G400(mmesa) ? &_mesa_texformat_i8 : &_mesa_texformat_argb4444;
 273
 274    case GL_YCBCR_MESA:
 275       if (MGA_IS_G400(mmesa) &&
 276           (type == GL_UNSIGNED_SHORT_8_8_APPLE ||
 277            type == GL_UNSIGNED_BYTE))
 278          return &_mesa_texformat_ycbcr;
 279       else
 280          return &_mesa_texformat_ycbcr_rev;
 281
 282    case GL_COLOR_INDEX:
 283    case GL_COLOR_INDEX1_EXT:
 284    case GL_COLOR_INDEX2_EXT:
 285    case GL_COLOR_INDEX4_EXT:
 286    case GL_COLOR_INDEX8_EXT:
 287    case GL_COLOR_INDEX12_EXT:
 288    case GL_COLOR_INDEX16_EXT:
 289       return &_mesa_texformat_ci8;
 290
 291    default:
 292       _mesa_problem( ctx, "unexpected texture format in %s", __FUNCTION__ );
 293       return NULL;
 294    }
 295
 296    return NULL; /* never get here */
 297 }
 298
 299
 300
 301
 302 /**
 303  * Allocate space for and load the mesa images into the texture memory block.
 304  * This will happen before drawing with a new texture, or drawing with a
 305  * texture after it was swapped out or teximaged again.
 306  */
 307
 308 static mgaTextureObjectPtr
 309 mgaAllocTexObj( struct gl_texture_object *tObj )
 310 {
 311    mgaTextureObjectPtr t;
 312
 313
 314    t = CALLOC( sizeof( *t ) );
 315    tObj->DriverData = t;
 316    if ( t != NULL ) {
 317       /* Initialize non-image-dependent parts of the state:
 318        */
 319       t->base.tObj = tObj;
 320
 321       t->setup.texctl = TMC_takey_1 | TMC_tamask_0;
 322       t->setup.texctl2 = TMC_ckstransdis_enable;
 323       t->setup.texfilter = TF_filteralpha_enable | TF_uvoffset_OGL;
 324
 325       t->border_fallback = GL_FALSE;
 326       t->texenv_fallback = GL_FALSE;
 327
 328       make_empty_list( & t->base );
 329
 330       mgaSetTexWrapping( t, tObj->WrapS, tObj->WrapT );
 331       mgaSetTexFilter( t, tObj->MinFilter, tObj->MagFilter );
 332       mgaSetTexBorderColor( t, tObj->_BorderChan );
 333    }
 334
 335    return( t );
 336 }
 337
 338
 339 static void mgaTexEnv( GLcontext *ctx, GLenum target,
 340                          GLenum pname, const GLfloat *param )
 341 {
 342    GLuint unit = ctx->Texture.CurrentUnit;
 343    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
 344    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 345
 346    switch( pname ) {
 347    case GL_TEXTURE_ENV_COLOR: {
 348       GLubyte c[4];
 349
 350       UNCLAMPED_FLOAT_TO_RGBA_CHAN( c, texUnit->EnvColor );
 351       mmesa->envcolor[unit] = PACK_COLOR_8888( c[3], c[0], c[1], c[2] );
 352       break;
 353    }
 354    }
 355 }
 356
 357
 358 static void mgaTexImage2D( GLcontext *ctx, GLenum target, GLint level,
 359                             GLint internalFormat,
 360                             GLint width, GLint height, GLint border,
 361                             GLenum format, GLenum type, const GLvoid *pixels,
 362                             const struct gl_pixelstore_attrib *packing,
 363                             struct gl_texture_object *texObj,
 364                             struct gl_texture_image *texImage )
 365 {
 366    driTextureObject * t = (driTextureObject *) texObj->DriverData;
 367
 368    if ( t != NULL ) {
 369       driSwapOutTextureObject( t );
 370    }
 371    else {
 372       t = (driTextureObject *) mgaAllocTexObj( texObj );
 373       if ( t == NULL ) {
 374          _mesa_error( ctx, GL_OUT_OF_MEMORY, "glTexImage2D" );
 375          return;
 376       }
 377    }
 378
 379    _mesa_store_teximage2d( ctx, target, level, internalFormat,
 380                            width, height, border, format, type,
 381                            pixels, packing, texObj, texImage );
 382    level -= t->firstLevel;
 383    if (level >= 0)
 384       t->dirty_images[0] |= (1UL << level);
 385 }
 386
 387 static void mgaTexSubImage2D( GLcontext *ctx,
 388                                GLenum target,
 389                                GLint level,
 390                                GLint xoffset, GLint yoffset,
 391                                GLsizei width, GLsizei height,
 392                                GLenum format, GLenum type,
 393                                const GLvoid *pixels,
 394                                const struct gl_pixelstore_attrib *packing,
 395                                struct gl_texture_object *texObj,
 396                                struct gl_texture_image *texImage )
 397 {
 398    driTextureObject * t = (driTextureObject *) texObj->DriverData;
 399
 400    assert( t ); /* this _should_ be true */
 401    if ( t != NULL ) {
 402       driSwapOutTextureObject( t );
 403    }
 404    else {
 405       t = (driTextureObject *) mgaAllocTexObj( texObj );
 406       if ( t == NULL ) {
 407          _mesa_error( ctx, GL_OUT_OF_MEMORY, "glTexImage2D" );
 408          return;
 409       }
 410    }
 411
 412    _mesa_store_texsubimage2d(ctx, target, level, xoffset, yoffset, width,
 413                              height, format, type, pixels, packing, texObj,
 414                              texImage);
 415    level -= t->firstLevel;
 416    if (level >= 0)
 417       t->dirty_images[0] |= (1UL << level);
 418 }
 419
 420
 421 /**
 422  * Changes variables and flags for a state update, which will happen at the
 423  * next UpdateTextureState
 424  */
 425
 426 static void
 427 mgaTexParameter( GLcontext *ctx, GLenum target,
 428                    struct gl_texture_object *tObj,
 429                    GLenum pname, const GLfloat *params )
 430 {
 431    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 432    mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData;
 433
 434    /* If we don't have a hardware texture, it will be automatically
 435     * created with current state before it is used, so we don't have
 436     * to do anything now
 437     */
 438    if ( (t == NULL) ||
 439         (target != GL_TEXTURE_2D &&
 440          target != GL_TEXTURE_RECTANGLE_NV) ) {
 441       return;
 442    }
 443
 444    switch (pname) {
 445    case GL_TEXTURE_MIN_FILTER:
 446       driSwapOutTextureObject( (driTextureObject *) t );
 447       /* FALLTHROUGH */
 448    case GL_TEXTURE_MAG_FILTER:
 449       FLUSH_BATCH(mmesa);
 450       mgaSetTexFilter( t, tObj->MinFilter, tObj->MagFilter );
 451       break;
 452
 453    case GL_TEXTURE_WRAP_S:
 454    case GL_TEXTURE_WRAP_T:
 455       FLUSH_BATCH(mmesa);
 456       mgaSetTexWrapping(t,tObj->WrapS,tObj->WrapT);
 457       break;
 458
 459    case GL_TEXTURE_BORDER_COLOR:
 460       FLUSH_BATCH(mmesa);
 461       mgaSetTexBorderColor(t, tObj->_BorderChan);
 462       break;
 463
 464    case GL_TEXTURE_BASE_LEVEL:
 465    case GL_TEXTURE_MAX_LEVEL:
 466    case GL_TEXTURE_MIN_LOD:
 467    case GL_TEXTURE_MAX_LOD:
 468       /* This isn't the most efficient solution but there doesn't appear to
 469        * be a nice alternative.  Since there's no LOD clamping,
 470        * we just have to rely on loading the right subset of mipmap levels
 471        * to simulate a clamped LOD.
 472        */
 473       driSwapOutTextureObject( (driTextureObject *) t );
 474       break;
 475
 476    default:
 477       return;
 478    }
 479 }
 480
 481
 482 static void
 483 mgaBindTexture( GLcontext *ctx, GLenum target,
 484                   struct gl_texture_object *tObj )
 485 {
 486    assert( (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_NV) ||
 487            (tObj->DriverData != NULL) );
 488 }
 489
 490
 491 static void
 492 mgaDeleteTexture( GLcontext *ctx, struct gl_texture_object *tObj )
 493 {
 494    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 495    driTextureObject * t = (driTextureObject *) tObj->DriverData;
 496
 497    if ( t ) {
 498       if ( mmesa ) {
 499          FLUSH_BATCH( mmesa );
 500       }
 501
 502       driDestroyTextureObject( t );
 503    }
 504
 505    /* Free mipmap images and the texture object itself */
 506    _mesa_delete_texture_object(ctx, tObj);
 507 }
 508
 509
 510 /**
 511  * Allocate a new texture object.
 512  * Called via ctx->Driver.NewTextureObject.
 513  * Note: this function will be called during context creation to
 514  * allocate the default texture objects.
 515  * Note: we could use containment here to 'derive' the driver-specific
 516  * texture object from the core mesa gl_texture_object.  Not done at this time.
 517  */
 518 static struct gl_texture_object *
 519 mgaNewTextureObject( GLcontext *ctx, GLuint name, GLenum target )
 520 {
 521    struct gl_texture_object *obj;
 522    obj = _mesa_new_texture_object(ctx, name, target);
 523    mgaAllocTexObj( obj );
 524    return obj;
 525 }
 526
 527
 528 void
 529 mgaInitTextureFuncs( struct dd_function_table *functions )
 530 {
 531    functions->ChooseTextureFormat       = mgaChooseTextureFormat;
 532    functions->TexImage2D                = mgaTexImage2D;
 533    functions->TexSubImage2D             = mgaTexSubImage2D;
 534    functions->BindTexture               = mgaBindTexture;
 535    functions->NewTextureObject          = mgaNewTextureObject;
 536    functions->DeleteTexture             = mgaDeleteTexture;
 537    functions->IsTextureResident         = driIsTextureResident;
 538    functions->TexEnv                    = mgaTexEnv;
 539    functions->TexParameter              = mgaTexParameter;
 540 }