src/glx/x11/glcontextmodes.c

   1 /*
   2  * (C) Copyright IBM Corporation 2003
   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 SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file glcontextmodes.c
  27  * Utility routines for working with \c __GLcontextModes structures.  At
  28  * some point most or all of these functions will be moved to the Mesa
  29  * code base.
  30  *
  31  * \author Ian Romanick <idr@us.ibm.com>
  32  */
  33
  34 #if defined(IN_MINI_GLX)
  35 #include <GL/gl.h>
  36 #else
  37 #if defined(HAVE_DIX_CONFIG_H)
  38 # include <dix-config.h>
  39 #endif
  40 #include <X11/X.h>
  41 #include <GL/glx.h>
  42 #include "GL/glxint.h"
  43 #endif
  44
  45 /* Memory macros */
  46 #if defined(IN_MINI_GLX)
  47 # include <stdlib.h>
  48 # include <string.h>
  49 # define _mesa_malloc(b) malloc(b)
  50 # define _mesa_free(m) free(m)
  51 # define _mesa_memset  memset
  52 #else
  53 # ifdef XFree86Server
  54 # include <os.h>
  55 # include <string.h>
  56 #  define _mesa_malloc(b) xalloc(b)
  57 #  define _mesa_free(m)   xfree(m)
  58 #  define _mesa_memset   memset
  59 # else
  60 #  include <X11/Xlibint.h>
  61 #  define _mesa_memset memset
  62 #  define _mesa_malloc(b) Xmalloc(b)
  63 #  define _mesa_free(m) Xfree(m)
  64 # endif /* XFree86Server */
  65 #endif /* !defined(IN_MINI_GLX) */
  66
  67 #include "glcontextmodes.h"
  68
  69 #if !defined(IN_MINI_GLX)
  70 #define NUM_VISUAL_TYPES   6
  71
  72 /**
  73  * Convert an X visual type to a GLX visual type.
  74  *
  75  * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
  76  *        to be converted.
  77  * \return If \c visualType is a valid X visual type, a GLX visual type will
  78  *         be returned.  Otherwise \c GLX_NONE will be returned.
  79  */
  80 GLint
  81 _gl_convert_from_x_visual_type( int visualType )
  82 {
  83     static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
  84         GLX_STATIC_GRAY,  GLX_GRAY_SCALE,
  85         GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
  86         GLX_TRUE_COLOR,   GLX_DIRECT_COLOR
  87     };
  88
  89     return ( (unsigned) visualType < NUM_VISUAL_TYPES )
  90         ? glx_visual_types[ visualType ] : GLX_NONE;
  91 }
  92
  93
  94 /**
  95  * Convert a GLX visual type to an X visual type.
  96  *
  97  * \param visualType GLX visual type (i.e., \c GLX_TRUE_COLOR,
  98  *                   \c GLX_STATIC_GRAY, etc.) to be converted.
  99  * \return If \c visualType is a valid GLX visual type, an X visual type will
 100  *         be returned.  Otherwise -1 will be returned.
 101  */
 102 GLint
 103 _gl_convert_to_x_visual_type( int visualType )
 104 {
 105     static const int x_visual_types[ NUM_VISUAL_TYPES ] = {
 106         TrueColor,   DirectColor,
 107         PseudoColor, StaticColor,
 108         GrayScale,   StaticGray
 109     };
 110
 111     return ( (unsigned) (visualType - GLX_TRUE_COLOR) < NUM_VISUAL_TYPES )
 112         ? x_visual_types[ visualType - GLX_TRUE_COLOR ] : -1;
 113 }
 114
 115
 116 /**
 117  * Copy a GLX visual config structure to a GL context mode structure.  All
 118  * of the fields in \c config are copied to \c mode.  Additional fields in
 119  * \c mode that can be derrived from the fields of \c config (i.e.,
 120  * \c haveDepthBuffer) are also filled in.  The remaining fields in \c mode
 121  * that cannot be derived are set to default values.
 122  *
 123  * \param mode   Destination GL context mode.
 124  * \param config Source GLX visual config.
 125  *
 126  * \note
 127  * The \c fbconfigID and \c visualID fields of the \c __GLcontextModes
 128  * structure will be set to the \c vid of the \c __GLXvisualConfig structure.
 129  */
 130 void
 131 _gl_copy_visual_to_context_mode( __GLcontextModes * mode,
 132                                  const __GLXvisualConfig * config )
 133 {
 134     __GLcontextModes * const next = mode->next;
 135
 136     (void) _mesa_memset( mode, 0, sizeof( __GLcontextModes ) );
 137     mode->next = next;
 138
 139     mode->visualID = config->vid;
 140     mode->visualType = _gl_convert_from_x_visual_type( config->class );
 141     mode->xRenderable = GL_TRUE;
 142     mode->fbconfigID = config->vid;
 143     mode->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT;
 144
 145     mode->rgbMode = (config->rgba != 0);
 146     mode->renderType = (mode->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
 147
 148     mode->colorIndexMode = !(mode->rgbMode);
 149     mode->doubleBufferMode = (config->doubleBuffer != 0);
 150     mode->stereoMode = (config->stereo != 0);
 151
 152     mode->haveAccumBuffer = ((config->accumRedSize +
 153                               config->accumGreenSize +
 154                               config->accumBlueSize +
 155                               config->accumAlphaSize) > 0);
 156     mode->haveDepthBuffer = (config->depthSize > 0);
 157     mode->haveStencilBuffer = (config->stencilSize > 0);
 158
 159     mode->redBits = config->redSize;
 160     mode->greenBits = config->greenSize;
 161     mode->blueBits = config->blueSize;
 162     mode->alphaBits = config->alphaSize;
 163     mode->redMask = config->redMask;
 164     mode->greenMask = config->greenMask;
 165     mode->blueMask = config->blueMask;
 166     mode->alphaMask = config->alphaMask;
 167     mode->rgbBits = mode->rgbMode ? config->bufferSize : 0;
 168     mode->indexBits = mode->colorIndexMode ? config->bufferSize : 0;
 169
 170     mode->accumRedBits = config->accumRedSize;
 171     mode->accumGreenBits = config->accumGreenSize;
 172     mode->accumBlueBits = config->accumBlueSize;
 173     mode->accumAlphaBits = config->accumAlphaSize;
 174     mode->depthBits = config->depthSize;
 175     mode->stencilBits = config->stencilSize;
 176
 177     mode->numAuxBuffers = config->auxBuffers;
 178     mode->level = config->level;
 179
 180     mode->visualRating = config->visualRating;
 181     mode->transparentPixel = config->transparentPixel;
 182     mode->transparentRed   = config->transparentRed;
 183     mode->transparentGreen = config->transparentGreen;
 184     mode->transparentBlue  = config->transparentBlue;
 185     mode->transparentAlpha = config->transparentAlpha;
 186     mode->transparentIndex = config->transparentIndex;
 187     mode->samples = config->multiSampleSize;
 188     mode->sampleBuffers = config->nMultiSampleBuffers;
 189     /* mode->visualSelectGroup = config->visualSelectGroup; ? */
 190
 191     mode->swapMethod = GLX_SWAP_UNDEFINED_OML;
 192
 193     mode->bindToTextureRgb = (mode->rgbMode) ? GL_TRUE : GL_FALSE;
 194     mode->bindToTextureRgba = (mode->rgbMode && mode->alphaBits) ?
 195         GL_TRUE : GL_FALSE;
 196     mode->bindToMipmapTexture = mode->rgbMode ? GL_TRUE : GL_FALSE;
 197     mode->bindToTextureTargets = mode->rgbMode ?
 198         GLX_TEXTURE_1D_BIT_EXT | GLX_TEXTURE_2D_BIT_EXT |
 199         GLX_TEXTURE_RECTANGLE_BIT_EXT : 0;
 200     mode->yInverted = GL_FALSE;
 201 }
 202
 203
 204 /**
 205  * Get data from a GL context mode.
 206  *
 207  * \param mode         GL context mode whose data is to be returned.
 208  * \param attribute    Attribute of \c mode that is to be returned.
 209  * \param value_return Location to store the data member of \c mode.
 210  * \return  If \c attribute is a valid attribute of \c mode, zero is
 211  *          returned.  Otherwise \c GLX_BAD_ATTRIBUTE is returned.
 212  */
 213 int
 214 _gl_get_context_mode_data(const __GLcontextModes *mode, int attribute,
 215                           int *value_return)
 216 {
 217     switch (attribute) {
 218       case GLX_USE_GL:
 219         *value_return = GL_TRUE;
 220         return 0;
 221       case GLX_BUFFER_SIZE:
 222         *value_return = mode->rgbBits;
 223         return 0;
 224       case GLX_RGBA:
 225         *value_return = mode->rgbMode;
 226         return 0;
 227       case GLX_RED_SIZE:
 228         *value_return = mode->redBits;
 229         return 0;
 230       case GLX_GREEN_SIZE:
 231         *value_return = mode->greenBits;
 232         return 0;
 233       case GLX_BLUE_SIZE:
 234         *value_return = mode->blueBits;
 235         return 0;
 236       case GLX_ALPHA_SIZE:
 237         *value_return = mode->alphaBits;
 238         return 0;
 239       case GLX_DOUBLEBUFFER:
 240         *value_return = mode->doubleBufferMode;
 241         return 0;
 242       case GLX_STEREO:
 243         *value_return = mode->stereoMode;
 244         return 0;
 245       case GLX_AUX_BUFFERS:
 246         *value_return = mode->numAuxBuffers;
 247         return 0;
 248       case GLX_DEPTH_SIZE:
 249         *value_return = mode->depthBits;
 250         return 0;
 251       case GLX_STENCIL_SIZE:
 252         *value_return = mode->stencilBits;
 253         return 0;
 254       case GLX_ACCUM_RED_SIZE:
 255         *value_return = mode->accumRedBits;
 256         return 0;
 257       case GLX_ACCUM_GREEN_SIZE:
 258         *value_return = mode->accumGreenBits;
 259         return 0;
 260       case GLX_ACCUM_BLUE_SIZE:
 261         *value_return = mode->accumBlueBits;
 262         return 0;
 263       case GLX_ACCUM_ALPHA_SIZE:
 264         *value_return = mode->accumAlphaBits;
 265         return 0;
 266       case GLX_LEVEL:
 267         *value_return = mode->level;
 268         return 0;
 269       case GLX_TRANSPARENT_TYPE_EXT:
 270         *value_return = mode->transparentPixel;
 271         return 0;
 272       case GLX_TRANSPARENT_RED_VALUE:
 273         *value_return = mode->transparentRed;
 274         return 0;
 275       case GLX_TRANSPARENT_GREEN_VALUE:
 276         *value_return = mode->transparentGreen;
 277         return 0;
 278       case GLX_TRANSPARENT_BLUE_VALUE:
 279         *value_return = mode->transparentBlue;
 280         return 0;
 281       case GLX_TRANSPARENT_ALPHA_VALUE:
 282         *value_return = mode->transparentAlpha;
 283         return 0;
 284       case GLX_TRANSPARENT_INDEX_VALUE:
 285         *value_return = mode->transparentIndex;
 286         return 0;
 287       case GLX_X_VISUAL_TYPE:
 288         *value_return = mode->visualType;
 289         return 0;
 290       case GLX_CONFIG_CAVEAT:
 291         *value_return = mode->visualRating;
 292         return 0;
 293       case GLX_VISUAL_ID:
 294         *value_return = mode->visualID;
 295         return 0;
 296       case GLX_DRAWABLE_TYPE:
 297         *value_return = mode->drawableType;
 298         return 0;
 299       case GLX_RENDER_TYPE:
 300         *value_return = mode->renderType;
 301         return 0;
 302       case GLX_X_RENDERABLE:
 303         *value_return = mode->xRenderable;
 304         return 0;
 305       case GLX_FBCONFIG_ID:
 306         *value_return = mode->fbconfigID;
 307         return 0;
 308       case GLX_MAX_PBUFFER_WIDTH:
 309         *value_return = mode->maxPbufferWidth;
 310         return 0;
 311       case GLX_MAX_PBUFFER_HEIGHT:
 312         *value_return = mode->maxPbufferHeight;
 313         return 0;
 314       case GLX_MAX_PBUFFER_PIXELS:
 315         *value_return = mode->maxPbufferPixels;
 316         return 0;
 317       case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
 318         *value_return = mode->optimalPbufferWidth;
 319         return 0;
 320       case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
 321         *value_return = mode->optimalPbufferHeight;
 322         return 0;
 323       case GLX_SWAP_METHOD_OML:
 324         *value_return = mode->swapMethod;
 325         return 0;
 326       case GLX_SAMPLE_BUFFERS_SGIS:
 327         *value_return = mode->sampleBuffers;
 328         return 0;
 329       case GLX_SAMPLES_SGIS:
 330         *value_return = mode->samples;
 331         return 0;
 332       case GLX_BIND_TO_TEXTURE_RGB_EXT:
 333         *value_return = mode->bindToTextureRgb;
 334         return 0;
 335       case GLX_BIND_TO_TEXTURE_RGBA_EXT:
 336         *value_return = mode->bindToTextureRgba;
 337         return 0;
 338       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
 339         *value_return = mode->bindToMipmapTexture;
 340         return 0;
 341       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
 342         *value_return = mode->bindToTextureTargets;
 343         return 0;
 344       case GLX_Y_INVERTED_EXT:
 345         *value_return = mode->yInverted;
 346         return 0;
 347
 348       /* Applications are NOT allowed to query GLX_VISUAL_SELECT_GROUP_SGIX.
 349        * It is ONLY for communication between the GLX client and the GLX
 350        * server.
 351        */
 352       case GLX_VISUAL_SELECT_GROUP_SGIX:
 353       default:
 354         return GLX_BAD_ATTRIBUTE;
 355     }
 356 }
 357 #endif /* !defined(IN_MINI_GLX) */
 358
 359
 360 /**
 361  * Allocate a linked list of \c __GLcontextModes structures.  The fields of
 362  * each structure will be initialized to "reasonable" default values.  In
 363  * most cases this is the default value defined by table 3.4 of the GLX
 364  * 1.3 specification.  This means that most values are either initialized to
 365  * zero or \c GLX_DONT_CARE (which is -1).  As support for additional
 366  * extensions is added, the new values will be initialized to appropriate
 367  * values from the extension specification.
 368  *
 369  * \param count         Number of structures to allocate.
 370  * \param minimum_size  Minimum size of a structure to allocate.  This allows
 371  *                      for differences in the version of the
 372  *                      \c __GLcontextModes stucture used in libGL and in a
 373  *                      DRI-based driver.
 374  * \returns A pointer to the first element in a linked list of \c count
 375  *          stuctures on success, or \c NULL on failure.
 376  *
 377  * \warning Use of \c minimum_size does \b not guarantee binary compatibility.
 378  *          The fundamental assumption is that if the \c minimum_size
 379  *          specified by the driver and the size of the \c __GLcontextModes
 380  *          structure in libGL is the same, then the meaning of each byte in
 381  *          the structure is the same in both places.  \b Be \b careful!
 382  *          Basically this means that fields have to be added in libGL and
 383  *          then propagated to drivers.  Drivers should \b never arbitrarilly
 384  *          extend the \c __GLcontextModes data-structure.
 385  */
 386 __GLcontextModes *
 387 _gl_context_modes_create( unsigned count, size_t minimum_size )
 388 {
 389    const size_t size = (minimum_size > sizeof( __GLcontextModes ))
 390        ? minimum_size : sizeof( __GLcontextModes );
 391    __GLcontextModes * base = NULL;
 392    __GLcontextModes ** next;
 393    unsigned   i;
 394
 395    next = & base;
 396    for ( i = 0 ; i < count ; i++ ) {
 397       *next = (__GLcontextModes *) _mesa_malloc( size );
 398       if ( *next == NULL ) {
 399          _gl_context_modes_destroy( base );
 400          base = NULL;
 401          break;
 402       }
 403
 404       (void) _mesa_memset( *next, 0, size );
 405       (*next)->visualID = GLX_DONT_CARE;
 406       (*next)->visualType = GLX_DONT_CARE;
 407       (*next)->visualRating = GLX_NONE;
 408       (*next)->transparentPixel = GLX_NONE;
 409       (*next)->transparentRed = GLX_DONT_CARE;
 410       (*next)->transparentGreen = GLX_DONT_CARE;
 411       (*next)->transparentBlue = GLX_DONT_CARE;
 412       (*next)->transparentAlpha = GLX_DONT_CARE;
 413       (*next)->transparentIndex = GLX_DONT_CARE;
 414       (*next)->xRenderable = GLX_DONT_CARE;
 415       (*next)->fbconfigID = GLX_DONT_CARE;
 416       (*next)->swapMethod = GLX_SWAP_UNDEFINED_OML;
 417       (*next)->bindToTextureRgb = GLX_DONT_CARE;
 418       (*next)->bindToTextureRgba = GLX_DONT_CARE;
 419       (*next)->bindToMipmapTexture = GLX_DONT_CARE;
 420       (*next)->bindToTextureTargets = 0;
 421       (*next)->yInverted = GLX_DONT_CARE;
 422
 423       next = & ((*next)->next);
 424    }
 425
 426    return base;
 427 }
 428
 429
 430 /**
 431  * Destroy a linked list of \c __GLcontextModes structures created by
 432  * \c _gl_context_modes_create.
 433  *
 434  * \param modes  Linked list of structures to be destroyed.  All structres
 435  *               in the list will be freed.
 436  */
 437 void
 438 _gl_context_modes_destroy( __GLcontextModes * modes )
 439 {
 440    while ( modes != NULL ) {
 441       __GLcontextModes * const next = modes->next;
 442
 443       _mesa_free( modes );
 444       modes = next;
 445    }
 446 }
 447
 448
 449 /**
 450  * Find a context mode matching a Visual ID.
 451  *
 452  * \param modes  List list of context-mode structures to be searched.
 453  * \param vid    Visual ID to be found.
 454  * \returns A pointer to a context-mode in \c modes if \c vid was found in
 455  *          the list, or \c NULL if it was not.
 456  */
 457
 458 __GLcontextModes *
 459 _gl_context_modes_find_visual( __GLcontextModes * modes, int vid )
 460 {
 461     while ( modes != NULL ) {
 462         if ( modes->visualID == vid ) {
 463             break;
 464         }
 465
 466         modes = modes->next;
 467     }
 468
 469     return modes;
 470 }
 471
 472
 473 /**
 474  * Determine if two context-modes are the same.  This is intended to be used
 475  * by libGL implementations to compare to sets of driver generated FBconfigs.
 476  *
 477  * \param a  Context-mode to be compared.
 478  * \param b  Context-mode to be compared.
 479  * \returns \c GL_TRUE if the two context-modes are the same.  \c GL_FALSE is
 480  *          returned otherwise.
 481  */
 482 GLboolean
 483 _gl_context_modes_are_same( const __GLcontextModes * a,
 484                             const __GLcontextModes * b )
 485 {
 486     return( (a->rgbMode == b->rgbMode) &&
 487             (a->floatMode == b->floatMode) &&
 488             (a->colorIndexMode == b->colorIndexMode) &&
 489             (a->doubleBufferMode == b->doubleBufferMode) &&
 490             (a->stereoMode == b->stereoMode) &&
 491             (a->redBits == b->redBits) &&
 492             (a->greenBits == b->greenBits) &&
 493             (a->blueBits == b->blueBits) &&
 494             (a->alphaBits == b->alphaBits) &&
 495 #if 0 /* For some reason these don't get set on the client-side in libGL. */
 496             (a->redMask == b->redMask) &&
 497             (a->greenMask == b->greenMask) &&
 498             (a->blueMask == b->blueMask) &&
 499             (a->alphaMask == b->alphaMask) &&
 500 #endif
 501             (a->rgbBits == b->rgbBits) &&
 502             (a->indexBits == b->indexBits) &&
 503             (a->accumRedBits == b->accumRedBits) &&
 504             (a->accumGreenBits == b->accumGreenBits) &&
 505             (a->accumBlueBits == b->accumBlueBits) &&
 506             (a->accumAlphaBits == b->accumAlphaBits) &&
 507             (a->depthBits == b->depthBits) &&
 508             (a->stencilBits == b->stencilBits) &&
 509             (a->numAuxBuffers == b->numAuxBuffers) &&
 510             (a->level == b->level) &&
 511             (a->pixmapMode == b->pixmapMode) &&
 512             (a->visualRating == b->visualRating) &&
 513
 514             (a->transparentPixel == b->transparentPixel) &&
 515
 516             ((a->transparentPixel != GLX_TRANSPARENT_RGB) ||
 517              ((a->transparentRed == b->transparentRed) &&
 518               (a->transparentGreen == b->transparentGreen) &&
 519               (a->transparentBlue == b->transparentBlue) &&
 520               (a->transparentAlpha == b->transparentAlpha))) &&
 521
 522             ((a->transparentPixel != GLX_TRANSPARENT_INDEX) ||
 523              (a->transparentIndex == b->transparentIndex)) &&
 524
 525             (a->sampleBuffers == b->sampleBuffers) &&
 526             (a->samples == b->samples) &&
 527             ((a->drawableType & b->drawableType) != 0) &&
 528             (a->renderType == b->renderType) &&
 529             (a->maxPbufferWidth == b->maxPbufferWidth) &&
 530             (a->maxPbufferHeight == b->maxPbufferHeight) &&
 531             (a->maxPbufferPixels == b->maxPbufferPixels) &&
 532             (a->optimalPbufferWidth == b->optimalPbufferWidth) &&
 533             (a->optimalPbufferHeight == b->optimalPbufferHeight) &&
 534             (a->swapMethod == b->swapMethod) &&
 535             (a->bindToTextureRgb == b->bindToTextureRgb) &&
 536             (a->bindToTextureRgba == b->bindToTextureRgba) &&
 537             (a->bindToMipmapTexture == b->bindToMipmapTexture) &&
 538             (a->bindToTextureTargets == b->bindToTextureTargets) &&
 539             (a->yInverted == b->yInverted) );
 540 }