| 1 | /* |
| 2 | * Copyright © 2011 Intel Corporation |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 21 | * DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | #ifdef HAVE_DIX_CONFIG_H |
| 24 | #include <dix-config.h> |
| 25 | #endif |
| 26 | |
| 27 | #include <GL/glxtokens.h> |
| 28 | #include "glxserver.h" |
| 29 | #include "glxext.h" |
| 30 | #include "indirect_dispatch.h" |
| 31 | |
| 32 | #define ALL_VALID_FLAGS \ |
| 33 | (GLX_CONTEXT_DEBUG_BIT_ARB | GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB \ |
| 34 | | GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB) |
| 35 | |
| 36 | static Bool |
| 37 | validate_GL_version(int major_version, int minor_version) |
| 38 | { |
| 39 | if (major_version <= 0 || minor_version < 0) |
| 40 | return False; |
| 41 | |
| 42 | switch (major_version) { |
| 43 | case 1: |
| 44 | if (minor_version > 5) |
| 45 | return False; |
| 46 | break; |
| 47 | |
| 48 | case 2: |
| 49 | if (minor_version > 1) |
| 50 | return False; |
| 51 | break; |
| 52 | |
| 53 | case 3: |
| 54 | if (minor_version > 3) |
| 55 | return False; |
| 56 | break; |
| 57 | |
| 58 | default: |
| 59 | break; |
| 60 | } |
| 61 | |
| 62 | return True; |
| 63 | } |
| 64 | |
| 65 | static Bool |
| 66 | validate_render_type(uint32_t render_type) |
| 67 | { |
| 68 | switch (render_type) { |
| 69 | case GLX_RGBA_TYPE: |
| 70 | case GLX_COLOR_INDEX_TYPE: |
| 71 | case GLX_RGBA_FLOAT_TYPE_ARB: |
| 72 | case GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT: |
| 73 | return True; |
| 74 | default: |
| 75 | return False; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | int |
| 80 | __glXDisp_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc) |
| 81 | { |
| 82 | ClientPtr client = cl->client; |
| 83 | xGLXCreateContextAttribsARBReq *req = (xGLXCreateContextAttribsARBReq *) pc; |
| 84 | int32_t *attribs = (req->numAttribs != 0) ? (int32_t *) (req + 1) : NULL; |
| 85 | unsigned i; |
| 86 | int major_version = 1; |
| 87 | int minor_version = 0; |
| 88 | uint32_t flags = 0; |
| 89 | uint32_t render_type = GLX_RGBA_TYPE; |
| 90 | __GLXcontext *ctx = NULL; |
| 91 | __GLXcontext *shareCtx = NULL; |
| 92 | __GLXscreen *glxScreen; |
| 93 | __GLXconfig *config; |
| 94 | int err; |
| 95 | |
| 96 | /* The GLX_ARB_create_context_robustness spec says: |
| 97 | * |
| 98 | * "The default value for GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB |
| 99 | * is GLX_NO_RESET_NOTIFICATION_ARB." |
| 100 | */ |
| 101 | int reset = GLX_NO_RESET_NOTIFICATION_ARB; |
| 102 | |
| 103 | /* The GLX_ARB_create_context_profile spec says: |
| 104 | * |
| 105 | * "The default value for GLX_CONTEXT_PROFILE_MASK_ARB is |
| 106 | * GLX_CONTEXT_CORE_PROFILE_BIT_ARB." |
| 107 | * |
| 108 | * The core profile only makes sense for OpenGL versions 3.2 and later. |
| 109 | * If the version ultimately specified is less than 3.2, the core profile |
| 110 | * bit is cleared (see below). |
| 111 | */ |
| 112 | int profile = GLX_CONTEXT_CORE_PROFILE_BIT_ARB; |
| 113 | |
| 114 | /* Verify that the size of the packet matches the size inferred from the |
| 115 | * sizes specified for the various fields. |
| 116 | */ |
| 117 | const unsigned expected_size = (sz_xGLXCreateContextAttribsARBReq |
| 118 | + (req->numAttribs * 8)) / 4; |
| 119 | |
| 120 | if (req->length != expected_size) |
| 121 | return BadLength; |
| 122 | |
| 123 | LEGAL_NEW_RESOURCE(req->context, client); |
| 124 | |
| 125 | /* The GLX_ARB_create_context spec says: |
| 126 | * |
| 127 | * "* If <config> is not a valid GLXFBConfig, GLXBadFBConfig is |
| 128 | * generated." |
| 129 | * |
| 130 | * On the client, the screen comes from the FBConfig, so GLXBadFBConfig |
| 131 | * should be issued if the screen is nonsense. |
| 132 | */ |
| 133 | if (!validGlxScreen(client, req->screen, &glxScreen, &err)) |
| 134 | return __glXError(GLXBadFBConfig); |
| 135 | |
| 136 | if (!validGlxFBConfig(client, glxScreen, req->fbconfig, &config, &err)) |
| 137 | return __glXError(GLXBadFBConfig); |
| 138 | |
| 139 | /* Validate the context with which the new context should share resources. |
| 140 | */ |
| 141 | if (req->shareList != None) { |
| 142 | if (!validGlxContext(client, req->shareList, DixReadAccess, |
| 143 | &shareCtx, &err)) |
| 144 | return err; |
| 145 | |
| 146 | /* The crazy condition is because C doesn't have a logical XOR |
| 147 | * operator. Comparing directly for equality may fail if one is 1 and |
| 148 | * the other is 2 even though both are logically true. |
| 149 | */ |
| 150 | if (!!req->isDirect != !!shareCtx->isDirect) { |
| 151 | client->errorValue = req->shareList; |
| 152 | return BadMatch; |
| 153 | } |
| 154 | |
| 155 | /* The GLX_ARB_create_context spec says: |
| 156 | * |
| 157 | * "* If the server context state for <share_context>...was |
| 158 | * created on a different screen than the one referenced by |
| 159 | * <config>...BadMatch is generated." |
| 160 | */ |
| 161 | if (glxScreen != shareCtx->pGlxScreen) { |
| 162 | client->errorValue = shareCtx->pGlxScreen->pScreen->myNum; |
| 163 | return BadMatch; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | for (i = 0; i < req->numAttribs; i++) { |
| 168 | switch (attribs[i * 2]) { |
| 169 | case GLX_CONTEXT_MAJOR_VERSION_ARB: |
| 170 | major_version = attribs[2 * i + 1]; |
| 171 | break; |
| 172 | |
| 173 | case GLX_CONTEXT_MINOR_VERSION_ARB: |
| 174 | minor_version = attribs[2 * i + 1]; |
| 175 | break; |
| 176 | |
| 177 | case GLX_CONTEXT_FLAGS_ARB: |
| 178 | flags = attribs[2 * i + 1]; |
| 179 | break; |
| 180 | |
| 181 | case GLX_RENDER_TYPE: |
| 182 | render_type = attribs[2 * i + 1]; |
| 183 | break; |
| 184 | |
| 185 | case GLX_CONTEXT_PROFILE_MASK_ARB: |
| 186 | profile = attribs[2 * i + 1]; |
| 187 | break; |
| 188 | |
| 189 | case GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB: |
| 190 | reset = attribs[2 * i + 1]; |
| 191 | if (reset != GLX_NO_RESET_NOTIFICATION_ARB |
| 192 | && reset != GLX_LOSE_CONTEXT_ON_RESET_ARB) |
| 193 | return BadValue; |
| 194 | |
| 195 | break; |
| 196 | |
| 197 | default: |
| 198 | return BadValue; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /* The GLX_ARB_create_context spec says: |
| 203 | * |
| 204 | * "If attributes GLX_CONTEXT_MAJOR_VERSION_ARB and |
| 205 | * GLX_CONTEXT_MINOR_VERSION_ARB, when considered together |
| 206 | * with attributes GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB and |
| 207 | * GLX_RENDER_TYPE, specify an OpenGL version and feature set |
| 208 | * that are not defined, BadMatch is generated. |
| 209 | * |
| 210 | * ...Feature deprecation was introduced with OpenGL 3.0, so |
| 211 | * forward-compatible contexts may only be requested for |
| 212 | * OpenGL 3.0 and above. Thus, examples of invalid |
| 213 | * combinations of attributes include: |
| 214 | * |
| 215 | * - Major version < 1 or > 3 |
| 216 | * - Major version == 1 and minor version < 0 or > 5 |
| 217 | * - Major version == 2 and minor version < 0 or > 1 |
| 218 | * - Major version == 3 and minor version > 2 |
| 219 | * - Forward-compatible flag set and major version < 3 |
| 220 | * - Color index rendering and major version >= 3" |
| 221 | */ |
| 222 | if (!validate_GL_version(major_version, minor_version)) |
| 223 | return BadMatch; |
| 224 | |
| 225 | if (major_version < 3 |
| 226 | && ((flags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) != 0)) |
| 227 | return BadMatch; |
| 228 | |
| 229 | if (major_version >= 3 && render_type == GLX_COLOR_INDEX_TYPE) |
| 230 | return BadMatch; |
| 231 | |
| 232 | if (!validate_render_type(render_type)) |
| 233 | return BadValue; |
| 234 | |
| 235 | if ((flags & ~ALL_VALID_FLAGS) != 0) |
| 236 | return BadValue; |
| 237 | |
| 238 | /* The GLX_ARB_create_context_profile spec says: |
| 239 | * |
| 240 | * "* If attribute GLX_CONTEXT_PROFILE_MASK_ARB has no bits set; has |
| 241 | * any bits set other than GLX_CONTEXT_CORE_PROFILE_BIT_ARB and |
| 242 | * GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; has more than one of |
| 243 | * these bits set; or if the implementation does not support the |
| 244 | * requested profile, then GLXBadProfileARB is generated." |
| 245 | */ |
| 246 | switch (profile) { |
| 247 | case GLX_CONTEXT_CORE_PROFILE_BIT_ARB: |
| 248 | case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB: |
| 249 | break; |
| 250 | case GLX_CONTEXT_ES2_PROFILE_BIT_EXT: |
| 251 | /* The GLX_EXT_create_context_es2_profile spec says: |
| 252 | * |
| 253 | * "... If the version requested is 2.0, and the |
| 254 | * GLX_CONTEXT_ES2_PROFILE_BIT_EXT bit is set in the |
| 255 | * GLX_CONTEXT_PROFILE_MASK_ARB attribute (see below), then the |
| 256 | * context returned will implement OpenGL ES 2.0." |
| 257 | * |
| 258 | * It also says: |
| 259 | * |
| 260 | * "* If attribute GLX_CONTEXT_PROFILE_MASK_ARB has no bits set; |
| 261 | * has any bits set other than |
| 262 | * GLX_CONTEXT_CORE_PROFILE_BIT_ARB, |
| 263 | * GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, or |
| 264 | * GLX_CONTEXT_ES2_PROFILE_BIT_EXT; has more than one of these |
| 265 | * bits set; or if the implementation does not supported the |
| 266 | * requested profile, then GLXBadProfileARB is generated." |
| 267 | * |
| 268 | * It does not specifically say what is supposed to happen if |
| 269 | * GLX_CONTEXT_ES2_PROFILE_BIT_EXT is set but the version requested is |
| 270 | * not 2.0. We choose to generate GLXBadProfileARB as this matches |
| 271 | * NVIDIA's behavior. |
| 272 | */ |
| 273 | if (major_version != 2 || minor_version != 0) |
| 274 | return __glXError(GLXBadProfileARB); |
| 275 | break; |
| 276 | default: |
| 277 | return __glXError(GLXBadProfileARB); |
| 278 | } |
| 279 | |
| 280 | /* The GLX_ARB_create_context_robustness spec says: |
| 281 | * |
| 282 | * "* If the reset notification behavior of <share_context> and the |
| 283 | * newly created context are different, BadMatch is generated." |
| 284 | */ |
| 285 | if (shareCtx != NULL && shareCtx->resetNotificationStrategy != reset) |
| 286 | return BadMatch; |
| 287 | |
| 288 | /* There is no GLX protocol for desktop OpenGL versions after 1.4. There |
| 289 | * is no GLX protocol for any version of OpenGL ES. If the application is |
| 290 | * requested an indirect rendering context for a version that cannot be |
| 291 | * satisfied, reject it. |
| 292 | * |
| 293 | * The GLX_ARB_create_context spec says: |
| 294 | * |
| 295 | * "* If <config> does not support compatible OpenGL contexts |
| 296 | * providing the requested API major and minor version, |
| 297 | * forward-compatible flag, and debug context flag, GLXBadFBConfig |
| 298 | * is generated." |
| 299 | */ |
| 300 | if (!req->isDirect && (major_version > 1 || minor_version > 4 |
| 301 | || profile == GLX_CONTEXT_ES2_PROFILE_BIT_EXT)) { |
| 302 | return __glXError(GLXBadFBConfig); |
| 303 | } |
| 304 | |
| 305 | /* Allocate memory for the new context |
| 306 | */ |
| 307 | if (req->isDirect) { |
| 308 | ctx = __glXdirectContextCreate(glxScreen, config, shareCtx); |
| 309 | err = BadAlloc; |
| 310 | } |
| 311 | else { |
| 312 | ctx = glxScreen->createContext(glxScreen, config, shareCtx, |
| 313 | req->numAttribs, (uint32_t *) attribs, |
| 314 | &err); |
| 315 | } |
| 316 | |
| 317 | if (ctx == NULL) |
| 318 | return err; |
| 319 | |
| 320 | ctx->pGlxScreen = glxScreen; |
| 321 | ctx->config = config; |
| 322 | ctx->id = req->context; |
| 323 | ctx->share_id = req->shareList; |
| 324 | ctx->idExists = True; |
| 325 | ctx->currentClient = False; |
| 326 | ctx->isDirect = req->isDirect; |
| 327 | ctx->hasUnflushedCommands = False; |
| 328 | ctx->renderMode = GL_RENDER; |
| 329 | ctx->feedbackBuf = NULL; |
| 330 | ctx->feedbackBufSize = 0; |
| 331 | ctx->selectBuf = NULL; |
| 332 | ctx->selectBufSize = 0; |
| 333 | ctx->drawPriv = NULL; |
| 334 | ctx->readPriv = NULL; |
| 335 | ctx->resetNotificationStrategy = reset; |
| 336 | |
| 337 | /* Add the new context to the various global tables of GLX contexts. |
| 338 | */ |
| 339 | if (!__glXAddContext(ctx)) { |
| 340 | (*ctx->destroy) (ctx); |
| 341 | client->errorValue = req->context; |
| 342 | return BadAlloc; |
| 343 | } |
| 344 | |
| 345 | return Success; |
| 346 | } |
| 347 | |
| 348 | int |
| 349 | __glXDispSwap_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc) |
| 350 | { |
| 351 | return BadRequest; |
| 352 | } |