src/glx/glxconfig.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 glxconfig.c
  27  * Utility routines for working with \c struct glx_config 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 #include <GL/glx.h>
  35 #include "GL/glxint.h"
  36 #include <stdlib.h>
  37 #include <string.h>
  38
  39 #include "glxconfig.h"
  40
  41 #define NUM_VISUAL_TYPES   6
  42
  43 /**
  44  * Get data from a GLX config
  45  *
  46  * \param mode         GL context mode whose data is to be returned.
  47  * \param attribute    Attribute of \c mode that is to be returned.
  48  * \param value_return Location to store the data member of \c mode.
  49  * \return  If \c attribute is a valid attribute of \c mode, zero is
  50  *          returned.  Otherwise \c GLX_BAD_ATTRIBUTE is returned.
  51  */
  52 _X_HIDDEN int
  53 glx_config_get(struct glx_config * mode, int attribute, int *value_return)
  54 {
  55    switch (attribute) {
  56    case GLX_USE_GL:
  57       *value_return = GL_TRUE;
  58       return 0;
  59    case GLX_BUFFER_SIZE:
  60       *value_return = mode->rgbBits;
  61       return 0;
  62    case GLX_RGBA:
  63       *value_return = mode->rgbMode;
  64       return 0;
  65    case GLX_RED_SIZE:
  66       *value_return = mode->redBits;
  67       return 0;
  68    case GLX_GREEN_SIZE:
  69       *value_return = mode->greenBits;
  70       return 0;
  71    case GLX_BLUE_SIZE:
  72       *value_return = mode->blueBits;
  73       return 0;
  74    case GLX_ALPHA_SIZE:
  75       *value_return = mode->alphaBits;
  76       return 0;
  77    case GLX_DOUBLEBUFFER:
  78       *value_return = mode->doubleBufferMode;
  79       return 0;
  80    case GLX_STEREO:
  81       *value_return = mode->stereoMode;
  82       return 0;
  83    case GLX_AUX_BUFFERS:
  84       *value_return = mode->numAuxBuffers;
  85       return 0;
  86    case GLX_DEPTH_SIZE:
  87       *value_return = mode->depthBits;
  88       return 0;
  89    case GLX_STENCIL_SIZE:
  90       *value_return = mode->stencilBits;
  91       return 0;
  92    case GLX_ACCUM_RED_SIZE:
  93       *value_return = mode->accumRedBits;
  94       return 0;
  95    case GLX_ACCUM_GREEN_SIZE:
  96       *value_return = mode->accumGreenBits;
  97       return 0;
  98    case GLX_ACCUM_BLUE_SIZE:
  99       *value_return = mode->accumBlueBits;
 100       return 0;
 101    case GLX_ACCUM_ALPHA_SIZE:
 102       *value_return = mode->accumAlphaBits;
 103       return 0;
 104    case GLX_LEVEL:
 105       *value_return = mode->level;
 106       return 0;
 107 #ifndef GLX_USE_APPLEGL               /* This isn't supported by CGL. */
 108    case GLX_TRANSPARENT_TYPE_EXT:
 109       *value_return = mode->transparentPixel;
 110       return 0;
 111 #endif
 112    case GLX_TRANSPARENT_RED_VALUE:
 113       *value_return = mode->transparentRed;
 114       return 0;
 115    case GLX_TRANSPARENT_GREEN_VALUE:
 116       *value_return = mode->transparentGreen;
 117       return 0;
 118    case GLX_TRANSPARENT_BLUE_VALUE:
 119       *value_return = mode->transparentBlue;
 120       return 0;
 121    case GLX_TRANSPARENT_ALPHA_VALUE:
 122       *value_return = mode->transparentAlpha;
 123       return 0;
 124    case GLX_TRANSPARENT_INDEX_VALUE:
 125       *value_return = mode->transparentIndex;
 126       return 0;
 127    case GLX_X_VISUAL_TYPE:
 128       *value_return = mode->visualType;
 129       return 0;
 130    case GLX_CONFIG_CAVEAT:
 131       *value_return = mode->visualRating;
 132       return 0;
 133    case GLX_VISUAL_ID:
 134       *value_return = mode->visualID;
 135       return 0;
 136    case GLX_DRAWABLE_TYPE:
 137       *value_return = mode->drawableType;
 138       return 0;
 139    case GLX_RENDER_TYPE:
 140       *value_return = mode->renderType;
 141       return 0;
 142    case GLX_X_RENDERABLE:
 143       *value_return = mode->xRenderable;
 144       return 0;
 145    case GLX_FBCONFIG_ID:
 146       *value_return = mode->fbconfigID;
 147       return 0;
 148    case GLX_MAX_PBUFFER_WIDTH:
 149       *value_return = mode->maxPbufferWidth;
 150       return 0;
 151    case GLX_MAX_PBUFFER_HEIGHT:
 152       *value_return = mode->maxPbufferHeight;
 153       return 0;
 154    case GLX_MAX_PBUFFER_PIXELS:
 155       *value_return = mode->maxPbufferPixels;
 156       return 0;
 157 #ifndef GLX_USE_APPLEGL               /* These aren't supported by CGL. */
 158    case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
 159       *value_return = mode->optimalPbufferWidth;
 160       return 0;
 161    case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
 162       *value_return = mode->optimalPbufferHeight;
 163       return 0;
 164    case GLX_SWAP_METHOD_OML:
 165       *value_return = mode->swapMethod;
 166       return 0;
 167 #endif
 168    case GLX_SAMPLE_BUFFERS_SGIS:
 169       *value_return = mode->sampleBuffers;
 170       return 0;
 171    case GLX_SAMPLES_SGIS:
 172       *value_return = mode->samples;
 173       return 0;
 174    case GLX_BIND_TO_TEXTURE_RGB_EXT:
 175       *value_return = mode->bindToTextureRgb;
 176       return 0;
 177    case GLX_BIND_TO_TEXTURE_RGBA_EXT:
 178       *value_return = mode->bindToTextureRgba;
 179       return 0;
 180    case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
 181       *value_return = mode->bindToMipmapTexture == GL_TRUE ? GL_TRUE :
 182          GL_FALSE;
 183       return 0;
 184    case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
 185       *value_return = mode->bindToTextureTargets;
 186       return 0;
 187    case GLX_Y_INVERTED_EXT:
 188       *value_return = mode->yInverted;
 189       return 0;
 190
 191       /* Applications are NOT allowed to query GLX_VISUAL_SELECT_GROUP_SGIX.
 192        * It is ONLY for communication between the GLX client and the GLX
 193        * server.
 194        */
 195    case GLX_VISUAL_SELECT_GROUP_SGIX:
 196    default:
 197       return GLX_BAD_ATTRIBUTE;
 198    }
 199 }
 200
 201
 202 /**
 203  * Allocate a linked list of \c struct glx_config structures.  The fields of
 204  * each structure will be initialized to "reasonable" default values.  In
 205  * most cases this is the default value defined by table 3.4 of the GLX
 206  * 1.3 specification.  This means that most values are either initialized to
 207  * zero or \c GLX_DONT_CARE (which is -1).  As support for additional
 208  * extensions is added, the new values will be initialized to appropriate
 209  * values from the extension specification.
 210  *
 211  * \param count         Number of structures to allocate.
 212  * \param minimum_size  Minimum size of a structure to allocate.  This allows
 213  *                      for differences in the version of the
 214  *                      \c struct glx_config stucture used in libGL and in a
 215  *                      DRI-based driver.
 216  * \returns A pointer to the first element in a linked list of \c count
 217  *          stuctures on success, or \c NULL on failure.
 218  */
 219 _X_HIDDEN struct glx_config *
 220 glx_config_create_list(unsigned count)
 221 {
 222    const size_t size = sizeof(struct glx_config);
 223    struct glx_config *base = NULL;
 224    struct glx_config **next;
 225    unsigned i;
 226
 227    next = &base;
 228    for (i = 0; i < count; i++) {
 229       *next = (struct glx_config *) malloc(size);
 230       if (*next == NULL) {
 231          glx_config_destroy_list(base);
 232          base = NULL;
 233          break;
 234       }
 235
 236       (void) memset(*next, 0, size);
 237       (*next)->visualID = GLX_DONT_CARE;
 238       (*next)->visualType = GLX_DONT_CARE;
 239       (*next)->visualRating = GLX_NONE;
 240       (*next)->transparentPixel = GLX_NONE;
 241       (*next)->transparentRed = GLX_DONT_CARE;
 242       (*next)->transparentGreen = GLX_DONT_CARE;
 243       (*next)->transparentBlue = GLX_DONT_CARE;
 244       (*next)->transparentAlpha = GLX_DONT_CARE;
 245       (*next)->transparentIndex = GLX_DONT_CARE;
 246       (*next)->xRenderable = GLX_DONT_CARE;
 247       (*next)->fbconfigID = GLX_DONT_CARE;
 248       (*next)->swapMethod = GLX_SWAP_UNDEFINED_OML;
 249       (*next)->bindToTextureRgb = GLX_DONT_CARE;
 250       (*next)->bindToTextureRgba = GLX_DONT_CARE;
 251       (*next)->bindToMipmapTexture = GLX_DONT_CARE;
 252       (*next)->bindToTextureTargets = GLX_DONT_CARE;
 253       (*next)->yInverted = GLX_DONT_CARE;
 254
 255       next = &((*next)->next);
 256    }
 257
 258    return base;
 259 }
 260
 261 _X_HIDDEN void
 262 glx_config_destroy_list(struct glx_config *configs)
 263 {
 264    while (configs != NULL) {
 265       struct glx_config *const next = configs->next;
 266
 267       free(configs);
 268       configs = next;
 269    }
 270 }
 271
 272
 273 /**
 274  * Find a context mode matching a Visual ID.
 275  *
 276  * \param modes  List list of context-mode structures to be searched.
 277  * \param vid    Visual ID to be found.
 278  * \returns A pointer to a context-mode in \c modes if \c vid was found in
 279  *          the list, or \c NULL if it was not.
 280  */
 281
 282 _X_HIDDEN struct glx_config *
 283 glx_config_find_visual(struct glx_config *configs, int vid)
 284 {
 285    struct glx_config *c;
 286
 287    for (c = configs; c != NULL; c = c->next)
 288       if (c->visualID == vid)
 289          return c;
 290
 291    return NULL;
 292 }
 293
 294 _X_HIDDEN struct glx_config *
 295 glx_config_find_fbconfig(struct glx_config *configs, int fbid)
 296 {
 297    struct glx_config *c;
 298
 299    for (c = configs; c != NULL; c = c->next)
 300       if (c->fbconfigID == fbid)
 301          return c;
 302
 303    return NULL;
 304 }