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, const GLfloat color[4])
 157 {
 158    GLubyte c[4];
 159    CLAMPED_FLOAT_TO_UBYTE(c[0], color[0]);
 160    CLAMPED_FLOAT_TO_UBYTE(c[1], color[1]);
 161    CLAMPED_FLOAT_TO_UBYTE(c[2], color[2]);
 162    CLAMPED_FLOAT_TO_UBYTE(c[3], color[3]);
 163    t->setup.texbordercol = PACK_COLOR_8888(c[3], c[0], c[1], c[2] );
 164 }
 165
 166
 167 static const struct gl_texture_format *
 168 mgaChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
 169                         GLenum format, GLenum type )
 170 {
 171    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 172    const GLboolean do32bpt =
 173        ( mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_32 );
 174    const GLboolean force16bpt =
 175        ( mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FORCE_16 );
 176    (void) format;
 177
 178    switch ( internalFormat ) {
 179    case 4:
 180    case GL_RGBA:
 181    case GL_COMPRESSED_RGBA:
 182       switch ( type ) {
 183       case GL_UNSIGNED_INT_10_10_10_2:
 184       case GL_UNSIGNED_INT_2_10_10_10_REV:
 185          return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb1555;
 186       case GL_UNSIGNED_SHORT_4_4_4_4:
 187       case GL_UNSIGNED_SHORT_4_4_4_4_REV:
 188          return &_mesa_texformat_argb4444;
 189       case GL_UNSIGNED_SHORT_5_5_5_1:
 190       case GL_UNSIGNED_SHORT_1_5_5_5_REV:
 191          return &_mesa_texformat_argb1555;
 192       default:
 193          return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;
 194       }
 195
 196    case 3:
 197    case GL_RGB:
 198    case GL_COMPRESSED_RGB:
 199       switch ( type ) {
 200       case GL_UNSIGNED_SHORT_4_4_4_4:
 201       case GL_UNSIGNED_SHORT_4_4_4_4_REV:
 202          return &_mesa_texformat_argb4444;
 203       case GL_UNSIGNED_SHORT_5_5_5_1:
 204       case GL_UNSIGNED_SHORT_1_5_5_5_REV:
 205          return &_mesa_texformat_argb1555;
 206       case GL_UNSIGNED_SHORT_5_6_5:
 207       case GL_UNSIGNED_SHORT_5_6_5_REV:
 208          return &_mesa_texformat_rgb565;
 209       default:
 210          return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_rgb565;
 211       }
 212
 213    case GL_RGBA8:
 214    case GL_RGB10_A2:
 215    case GL_RGBA12:
 216    case GL_RGBA16:
 217       return !force16bpt ?
 218           &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;
 219
 220    case GL_RGBA4:
 221    case GL_RGBA2:
 222       return &_mesa_texformat_argb4444;
 223
 224    case GL_RGB5_A1:
 225       return &_mesa_texformat_argb1555;
 226
 227    case GL_RGB8:
 228    case GL_RGB10:
 229    case GL_RGB12:
 230    case GL_RGB16:
 231       return !force16bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_rgb565;
 232
 233    case GL_RGB5:
 234    case GL_RGB4:
 235    case GL_R3_G3_B2:
 236       return &_mesa_texformat_rgb565;
 237
 238    case GL_ALPHA:
 239    case GL_ALPHA4:
 240    case GL_ALPHA8:
 241    case GL_ALPHA12:
 242    case GL_ALPHA16:
 243    case GL_COMPRESSED_ALPHA:
 244       /* FIXME: This will report incorrect component sizes... */
 245       return MGA_IS_G400(mmesa) ? &_mesa_texformat_al88 : &_mesa_texformat_argb4444;
 246
 247    case 1:
 248    case GL_LUMINANCE:
 249    case GL_LUMINANCE4:
 250    case GL_LUMINANCE8:
 251    case GL_LUMINANCE12:
 252    case GL_LUMINANCE16:
 253    case GL_COMPRESSED_LUMINANCE:
 254       /* FIXME: This will report incorrect component sizes... */
 255       return MGA_IS_G400(mmesa) ? &_mesa_texformat_al88 : &_mesa_texformat_rgb565;
 256
 257    case 2:
 258    case GL_LUMINANCE_ALPHA:
 259    case GL_LUMINANCE4_ALPHA4:
 260    case GL_LUMINANCE6_ALPHA2:
 261    case GL_LUMINANCE8_ALPHA8:
 262    case GL_LUMINANCE12_ALPHA4:
 263    case GL_LUMINANCE12_ALPHA12:
 264    case GL_LUMINANCE16_ALPHA16:
 265    case GL_COMPRESSED_LUMINANCE_ALPHA:
 266       /* FIXME: This will report incorrect component sizes... */
 267       return MGA_IS_G400(mmesa) ? &_mesa_texformat_al88 : &_mesa_texformat_argb4444;
 268
 269    case GL_INTENSITY:
 270    case GL_INTENSITY4:
 271    case GL_INTENSITY8:
 272    case GL_INTENSITY12:
 273    case GL_INTENSITY16:
 274    case GL_COMPRESSED_INTENSITY:
 275       /* FIXME: This will report incorrect component sizes... */
 276       return MGA_IS_G400(mmesa) ? &_mesa_texformat_i8 : &_mesa_texformat_argb4444;
 277
 278    case GL_YCBCR_MESA:
 279       if (MGA_IS_G400(mmesa) &&
 280           (type == GL_UNSIGNED_SHORT_8_8_APPLE ||
 281            type == GL_UNSIGNED_BYTE))
 282          return &_mesa_texformat_ycbcr;
 283       else
 284          return &_mesa_texformat_ycbcr_rev;
 285
 286    case GL_COLOR_INDEX:
 287    case GL_COLOR_INDEX1_EXT:
 288    case GL_COLOR_INDEX2_EXT:
 289    case GL_COLOR_INDEX4_EXT:
 290    case GL_COLOR_INDEX8_EXT:
 291    case GL_COLOR_INDEX12_EXT:
 292    case GL_COLOR_INDEX16_EXT:
 293       return &_mesa_texformat_ci8;
 294
 295    default:
 296       _mesa_problem( ctx, "unexpected texture format in %s", __FUNCTION__ );
 297       return NULL;
 298    }
 299
 300    return NULL; /* never get here */
 301 }
 302
 303
 304
 305
 306 /**
 307  * Allocate space for and load the mesa images into the texture memory block.
 308  * This will happen before drawing with a new texture, or drawing with a
 309  * texture after it was swapped out or teximaged again.
 310  */
 311
 312 static mgaTextureObjectPtr
 313 mgaAllocTexObj( struct gl_texture_object *tObj )
 314 {
 315    mgaTextureObjectPtr t;
 316
 317
 318    t = CALLOC( sizeof( *t ) );
 319    tObj->DriverData = t;
 320    if ( t != NULL ) {
 321       /* Initialize non-image-dependent parts of the state:
 322        */
 323       t->base.tObj = tObj;
 324
 325       t->setup.texctl = TMC_takey_1 | TMC_tamask_0;
 326       t->setup.texctl2 = TMC_ckstransdis_enable;
 327       t->setup.texfilter = TF_filteralpha_enable | TF_uvoffset_OGL;
 328
 329       t->border_fallback = GL_FALSE;
 330       t->texenv_fallback = GL_FALSE;
 331
 332       make_empty_list( & t->base );
 333
 334       mgaSetTexWrapping( t, tObj->WrapS, tObj->WrapT );
 335       mgaSetTexFilter( t, tObj->MinFilter, tObj->MagFilter );
 336       mgaSetTexBorderColor( t, tObj->BorderColor );
 337    }
 338
 339    return( t );
 340 }
 341
 342
 343 static void mgaTexEnv( GLcontext *ctx, GLenum target,
 344                          GLenum pname, const GLfloat *param )
 345 {
 346    GLuint unit = ctx->Texture.CurrentUnit;
 347    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
 348    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 349
 350    switch( pname ) {
 351    case GL_TEXTURE_ENV_COLOR: {
 352       GLubyte c[4];
 353
 354       UNCLAMPED_FLOAT_TO_RGBA_CHAN( c, texUnit->EnvColor );
 355       mmesa->envcolor[unit] = PACK_COLOR_8888( c[3], c[0], c[1], c[2] );
 356       break;
 357    }
 358    }
 359 }
 360
 361
 362 static void mgaTexImage2D( GLcontext *ctx, GLenum target, GLint level,
 363                             GLint internalFormat,
 364                             GLint width, GLint height, GLint border,
 365                             GLenum format, GLenum type, const GLvoid *pixels,
 366                             const struct gl_pixelstore_attrib *packing,
 367                             struct gl_texture_object *texObj,
 368                             struct gl_texture_image *texImage )
 369 {
 370    driTextureObject * t = (driTextureObject *) texObj->DriverData;
 371
 372    if ( t != NULL ) {
 373       driSwapOutTextureObject( t );
 374    }
 375    else {
 376       t = (driTextureObject *) mgaAllocTexObj( texObj );
 377       if ( t == NULL ) {
 378          _mesa_error( ctx, GL_OUT_OF_MEMORY, "glTexImage2D" );
 379          return;
 380       }
 381    }
 382
 383    _mesa_store_teximage2d( ctx, target, level, internalFormat,
 384                            width, height, border, format, type,
 385                            pixels, packing, texObj, texImage );
 386    level -= t->firstLevel;
 387    if (level >= 0)
 388       t->dirty_images[0] |= (1UL << level);
 389 }
 390
 391 static void mgaTexSubImage2D( GLcontext *ctx,
 392                                GLenum target,
 393                                GLint level,
 394                                GLint xoffset, GLint yoffset,
 395                                GLsizei width, GLsizei height,
 396                                GLenum format, GLenum type,
 397                                const GLvoid *pixels,
 398                                const struct gl_pixelstore_attrib *packing,
 399                                struct gl_texture_object *texObj,
 400                                struct gl_texture_image *texImage )
 401 {
 402    driTextureObject * t = (driTextureObject *) texObj->DriverData;
 403
 404    assert( t ); /* this _should_ be true */
 405    if ( t != NULL ) {
 406       driSwapOutTextureObject( t );
 407    }
 408    else {
 409       t = (driTextureObject *) mgaAllocTexObj( texObj );
 410       if ( t == NULL ) {
 411          _mesa_error( ctx, GL_OUT_OF_MEMORY, "glTexImage2D" );
 412          return;
 413       }
 414    }
 415
 416    _mesa_store_texsubimage2d(ctx, target, level, xoffset, yoffset, width,
 417                              height, format, type, pixels, packing, texObj,
 418                              texImage);
 419    level -= t->firstLevel;
 420    if (level >= 0)
 421       t->dirty_images[0] |= (1UL << level);
 422 }
 423
 424
 425 /**
 426  * Changes variables and flags for a state update, which will happen at the
 427  * next UpdateTextureState
 428  */
 429
 430 static void
 431 mgaTexParameter( GLcontext *ctx, GLenum target,
 432                    struct gl_texture_object *tObj,
 433                    GLenum pname, const GLfloat *params )
 434 {
 435    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 436    mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData;
 437
 438    /* If we don't have a hardware texture, it will be automatically
 439     * created with current state before it is used, so we don't have
 440     * to do anything now
 441     */
 442    if ( (t == NULL) ||
 443         (target != GL_TEXTURE_2D &&
 444          target != GL_TEXTURE_RECTANGLE_NV) ) {
 445       return;
 446    }
 447
 448    switch (pname) {
 449    case GL_TEXTURE_MIN_FILTER:
 450       driSwapOutTextureObject( (driTextureObject *) t );
 451       /* FALLTHROUGH */
 452    case GL_TEXTURE_MAG_FILTER:
 453       FLUSH_BATCH(mmesa);
 454       mgaSetTexFilter( t, tObj->MinFilter, tObj->MagFilter );
 455       break;
 456
 457    case GL_TEXTURE_WRAP_S:
 458    case GL_TEXTURE_WRAP_T:
 459       FLUSH_BATCH(mmesa);
 460       mgaSetTexWrapping(t,tObj->WrapS,tObj->WrapT);
 461       break;
 462
 463    case GL_TEXTURE_BORDER_COLOR:
 464       FLUSH_BATCH(mmesa);
 465       mgaSetTexBorderColor(t, tObj->BorderColor);
 466       break;
 467
 468    case GL_TEXTURE_BASE_LEVEL:
 469    case GL_TEXTURE_MAX_LEVEL:
 470    case GL_TEXTURE_MIN_LOD:
 471    case GL_TEXTURE_MAX_LOD:
 472       /* This isn't the most efficient solution but there doesn't appear to
 473        * be a nice alternative.  Since there's no LOD clamping,
 474        * we just have to rely on loading the right subset of mipmap levels
 475        * to simulate a clamped LOD.
 476        */
 477       driSwapOutTextureObject( (driTextureObject *) t );
 478       break;
 479
 480    default:
 481       return;
 482    }
 483 }
 484
 485
 486 static void
 487 mgaBindTexture( GLcontext *ctx, GLenum target,
 488                   struct gl_texture_object *tObj )
 489 {
 490    assert( (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_NV) ||
 491            (tObj->DriverData != NULL) );
 492 }
 493
 494
 495 static void
 496 mgaDeleteTexture( GLcontext *ctx, struct gl_texture_object *tObj )
 497 {
 498    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 499    driTextureObject * t = (driTextureObject *) tObj->DriverData;
 500
 501    if ( t ) {
 502       if ( mmesa ) {
 503          FLUSH_BATCH( mmesa );
 504       }
 505
 506       driDestroyTextureObject( t );
 507    }
 508
 509    /* Free mipmap images and the texture object itself */
 510    _mesa_delete_texture_object(ctx, tObj);
 511 }
 512
 513
 514 /**
 515  * Allocate a new texture object.
 516  * Called via ctx->Driver.NewTextureObject.
 517  * Note: this function will be called during context creation to
 518  * allocate the default texture objects.
 519  * Note: we could use containment here to 'derive' the driver-specific
 520  * texture object from the core mesa gl_texture_object.  Not done at this time.
 521  */
 522 static struct gl_texture_object *
 523 mgaNewTextureObject( GLcontext *ctx, GLuint name, GLenum target )
 524 {
 525    struct gl_texture_object *obj;
 526    obj = _mesa_new_texture_object(ctx, name, target);
 527    mgaAllocTexObj( obj );
 528    return obj;
 529 }
 530
 531
 532 void
 533 mgaInitTextureFuncs( struct dd_function_table *functions )
 534 {
 535    functions->ChooseTextureFormat       = mgaChooseTextureFormat;
 536    functions->TexImage2D                = mgaTexImage2D;
 537    functions->TexSubImage2D             = mgaTexSubImage2D;
 538    functions->BindTexture               = mgaBindTexture;
 539    functions->NewTextureObject          = mgaNewTextureObject;
 540    functions->DeleteTexture             = mgaDeleteTexture;
 541    functions->IsTextureResident         = driIsTextureResident;
 542    functions->TexEnv                    = mgaTexEnv;
 543    functions->TexParameter              = mgaTexParameter;
 544 }