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 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgatex.c,v 1.14 2002/10/30 12:51:36 alanh Exp $ */
  28
  29 #include "glheader.h"
  30 #include "mm.h"
  31 #include "mgacontext.h"
  32 #include "mgatex.h"
  33 #include "mgaregs.h"
  34 #include "mgatris.h"
  35 #include "mgaioctl.h"
  36
  37 #include "colormac.h"
  38 #include "context.h"
  39 #include "enums.h"
  40 #include "simple_list.h"
  41 #include "imports.h"
  42 #include "macros.h"
  43 #include "texformat.h"
  44 #include "texstore.h"
  45 #include "teximage.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 mgaDDTexEnv( 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
 369    if ( t != NULL ) {
 370       driSwapOutTextureObject( t );
 371    }
 372    else {
 373       t = (driTextureObject *) mgaAllocTexObj( texObj );
 374       if ( t == NULL ) {
 375          _mesa_error( ctx, GL_OUT_OF_MEMORY, "glTexImage2D" );
 376          return;
 377       }
 378    }
 379
 380    _mesa_store_teximage2d( ctx, target, level, internalFormat,
 381                            width, height, border, format, type,
 382                            pixels, packing, texObj, texImage );
 383    level -= t->firstLevel;
 384    if (level >= 0)
 385       t->dirty_images[0] |= (1UL << level);
 386 }
 387
 388 static void mgaTexSubImage2D( GLcontext *ctx,
 389                                GLenum target,
 390                                GLint level,
 391                                GLint xoffset, GLint yoffset,
 392                                GLsizei width, GLsizei height,
 393                                GLenum format, GLenum type,
 394                                const GLvoid *pixels,
 395                                const struct gl_pixelstore_attrib *packing,
 396                                struct gl_texture_object *texObj,
 397                                struct gl_texture_image *texImage )
 398 {
 399    driTextureObject * t = (driTextureObject *) texObj->DriverData;
 400
 401
 402    assert( t != NULL ); /* this _should_ be true */
 403    if ( t != NULL ) {
 404       driSwapOutTextureObject( t );
 405    }
 406    else {
 407       t = (driTextureObject *) mgaAllocTexObj( texObj );
 408       if ( t == NULL ) {
 409          _mesa_error( ctx, GL_OUT_OF_MEMORY, "glTexImage2D" );
 410          return;
 411       }
 412    }
 413
 414    _mesa_store_texsubimage2d(ctx, target, level, xoffset, yoffset, width,
 415                              height, format, type, pixels, packing, texObj,
 416                              texImage);
 417    level -= t->firstLevel;
 418    if (level >= 0)
 419       t->dirty_images[0] |= (1UL << level);
 420 }
 421
 422
 423 /**
 424  * Changes variables and flags for a state update, which will happen at the
 425  * next UpdateTextureState
 426  */
 427
 428 static void
 429 mgaDDTexParameter( GLcontext *ctx, GLenum target,
 430                    struct gl_texture_object *tObj,
 431                    GLenum pname, const GLfloat *params )
 432 {
 433    mgaContextPtr       mmesa = MGA_CONTEXT( ctx );
 434    mgaTextureObjectPtr t;
 435
 436    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
 443    if ( (t == NULL) ||
 444         (target != GL_TEXTURE_2D &&
 445          target != GL_TEXTURE_RECTANGLE_NV) ) {
 446       return;
 447    }
 448
 449    switch (pname) {
 450    case GL_TEXTURE_MIN_FILTER:
 451       driSwapOutTextureObject( (driTextureObject *) t );
 452       /* FALLTHROUGH */
 453    case GL_TEXTURE_MAG_FILTER:
 454       FLUSH_BATCH(mmesa);
 455       mgaSetTexFilter( t, tObj->MinFilter, tObj->MagFilter );
 456       break;
 457
 458    case GL_TEXTURE_WRAP_S:
 459    case GL_TEXTURE_WRAP_T:
 460       FLUSH_BATCH(mmesa);
 461       mgaSetTexWrapping(t,tObj->WrapS,tObj->WrapT);
 462       break;
 463
 464    case GL_TEXTURE_BORDER_COLOR:
 465       FLUSH_BATCH(mmesa);
 466       mgaSetTexBorderColor(t, tObj->_BorderChan);
 467       break;
 468
 469    case GL_TEXTURE_BASE_LEVEL:
 470    case GL_TEXTURE_MAX_LEVEL:
 471    case GL_TEXTURE_MIN_LOD:
 472    case GL_TEXTURE_MAX_LOD:
 473       /* This isn't the most efficient solution but there doesn't appear to
 474        * be a nice alternative.  Since there's no LOD clamping,
 475        * we just have to rely on loading the right subset of mipmap levels
 476        * to simulate a clamped LOD.
 477        */
 478       driSwapOutTextureObject( (driTextureObject *) t );
 479       break;
 480
 481    default:
 482       return;
 483    }
 484 }
 485
 486
 487 static void
 488 mgaDDBindTexture( GLcontext *ctx, GLenum target,
 489                   struct gl_texture_object *tObj )
 490 {
 491    if ( target == GL_TEXTURE_2D ||
 492         target == GL_TEXTURE_RECTANGLE_NV ) {
 493       if ( tObj->DriverData == NULL ) {
 494          mgaAllocTexObj( tObj );
 495       }
 496    }
 497 }
 498
 499
 500 static void
 501 mgaDDDeleteTexture( GLcontext *ctx, struct gl_texture_object *tObj )
 502 {
 503    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 504    driTextureObject * t = (driTextureObject *) tObj->DriverData;
 505
 506    if ( t ) {
 507       if ( mmesa ) {
 508          FLUSH_BATCH( mmesa );
 509       }
 510
 511       driDestroyTextureObject( t );
 512    }
 513 }
 514
 515
 516 void
 517 mgaDDInitTextureFuncs( GLcontext *ctx )
 518 {
 519    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 520
 521
 522    ctx->Driver.ChooseTextureFormat      = mgaChooseTextureFormat;
 523    ctx->Driver.TexImage1D               = _mesa_store_teximage1d;
 524    ctx->Driver.TexImage2D               = mgaTexImage2D;
 525    ctx->Driver.TexImage3D               = _mesa_store_teximage3d;
 526    ctx->Driver.TexSubImage1D            = _mesa_store_texsubimage1d;
 527    ctx->Driver.TexSubImage2D            = mgaTexSubImage2D;
 528    ctx->Driver.TexSubImage3D            = _mesa_store_texsubimage3d;
 529    ctx->Driver.CopyTexImage1D           = _swrast_copy_teximage1d;
 530    ctx->Driver.CopyTexImage2D           = _swrast_copy_teximage2d;
 531    ctx->Driver.CopyTexSubImage1D        = _swrast_copy_texsubimage1d;
 532    ctx->Driver.CopyTexSubImage2D        = _swrast_copy_texsubimage2d;
 533    ctx->Driver.CopyTexSubImage3D        = _swrast_copy_texsubimage3d;
 534    ctx->Driver.TestProxyTexImage        = _mesa_test_proxy_teximage;
 535
 536    ctx->Driver.BindTexture              = mgaDDBindTexture;
 537    ctx->Driver.CreateTexture            = NULL; /* FIXME: Is this used??? */
 538    ctx->Driver.DeleteTexture            = mgaDDDeleteTexture;
 539    ctx->Driver.IsTextureResident        = driIsTextureResident;
 540    ctx->Driver.PrioritizeTexture        = NULL;
 541    ctx->Driver.ActiveTexture            = NULL;
 542    ctx->Driver.UpdateTexturePalette     = NULL;
 543
 544    ctx->Driver.TexEnv                   = mgaDDTexEnv;
 545    ctx->Driver.TexParameter             = mgaDDTexParameter;
 546
 547    driInitTextureObjects( ctx, & mmesa->swapped,
 548                           (DRI_TEXMGR_DO_TEXTURE_2D |
 549                            DRI_TEXMGR_DO_TEXTURE_RECT) );
 550 }