/* * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright © 2008 Red Hat, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Soft- * ware"), to deal in the Software without restriction, including without * limitation the rights to use, copy, modify, merge, publish, distribute, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, provided that the above copyright * notice(s) and this permission notice appear in all copies of the Soft- * ware and that both the above copyright notice(s) and this permission * notice appear in supporting documentation. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL- * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE- * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR- * MANCE OF THIS SOFTWARE. * * Except as contained in this notice, the name of a copyright holder shall * not be used in advertising or otherwise to promote the sale, use or * other dealings in this Software without prior written authorization of * the copyright holder. * * Authors: * Kevin E. Martin * Brian Paul * Kristian Høgsberg (krh@redhat.com) */ #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) #include #include #include #include "glxclient.h" #include "dri_common.h" #include "loader.h" #include #include #ifndef RTLD_NOW #define RTLD_NOW 0 #endif #ifndef RTLD_GLOBAL #define RTLD_GLOBAL 0 #endif #ifndef GL_LIB_NAME #define GL_LIB_NAME "libGL.so.1" #endif /** * Try to \c dlopen the named driver. * * This function adds the "_dri.so" suffix to the driver name and searches the * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in * order to find the driver. * * \param driverName - a name like "i965", "radeon", "nouveau", etc. * \param out_driver_handle - Address to return the resulting dlopen() handle. * * \returns * The __DRIextension entrypoint table for the driver, or \c NULL if driver * file not found. */ _X_HIDDEN const __DRIextension ** driOpenDriver(const char *driverName, void **out_driver_handle) { void *glhandle; /* Attempt to make sure libGL symbols will be visible to the driver */ glhandle = dlopen(GL_LIB_NAME, RTLD_NOW | RTLD_GLOBAL); static const char *search_path_vars[] = { "LIBGL_DRIVERS_PATH", "LIBGL_DRIVERS_DIR", /* deprecated */ NULL }; const __DRIextension **extensions = loader_open_driver(driverName, out_driver_handle, search_path_vars); if (glhandle) dlclose(glhandle); return extensions; } #define __ATTRIB(attrib, field) \ { attrib, offsetof(struct glx_config, field) } static const struct { unsigned int attrib, offset; } attribMap[] = { __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits), __ATTRIB(__DRI_ATTRIB_LEVEL, level), __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits), __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits), __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits), __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits), __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits), __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits), __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits), __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits), __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits), __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits), __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers), __ATTRIB(__DRI_ATTRIB_SAMPLES, samples), __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode), __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode), __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers), __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod), __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb), __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba), __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE, bindToMipmapTexture), __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted), __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable) }; static int scalarEqual(struct glx_config *mode, unsigned int attrib, unsigned int value) { unsigned glxValue, i; for (i = 0; i < ARRAY_SIZE(attribMap); i++) if (attribMap[i].attrib == attrib) { glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset); return glxValue == GLX_DONT_CARE || glxValue == value; } return GL_TRUE; /* Is a non-existing attribute equal to value? */ } static int driConfigEqual(const __DRIcoreExtension *core, struct glx_config *config, const __DRIconfig *driConfig) { unsigned int attrib, value, glxValue; int i; i = 0; while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) { switch (attrib) { case __DRI_ATTRIB_RENDER_TYPE: glxValue = 0; if (value & __DRI_ATTRIB_RGBA_BIT) { glxValue |= GLX_RGBA_BIT; } if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) { glxValue |= GLX_COLOR_INDEX_BIT; } if (value & __DRI_ATTRIB_FLOAT_BIT) { glxValue |= GLX_RGBA_FLOAT_BIT_ARB; } if (value & __DRI_ATTRIB_UNSIGNED_FLOAT_BIT) { glxValue |= GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT; } if (glxValue != config->renderType) return GL_FALSE; break; case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS: glxValue = 0; if (value & __DRI_ATTRIB_TEXTURE_1D_BIT) glxValue |= GLX_TEXTURE_1D_BIT_EXT; if (value & __DRI_ATTRIB_TEXTURE_2D_BIT) glxValue |= GLX_TEXTURE_2D_BIT_EXT; if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT) glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT; if (config->bindToTextureTargets != GLX_DONT_CARE && glxValue != config->bindToTextureTargets) return GL_FALSE; break; case __DRI_ATTRIB_SWAP_METHOD: if (value == __DRI_ATTRIB_SWAP_EXCHANGE) glxValue = GLX_SWAP_EXCHANGE_OML; else if (value == __DRI_ATTRIB_SWAP_COPY) glxValue = GLX_SWAP_COPY_OML; else glxValue = GLX_SWAP_UNDEFINED_OML; if (!scalarEqual(config, attrib, glxValue)) return GL_FALSE; break; /* Nerf some attributes we can safely ignore if the server claims to * support them but the driver does not. */ case __DRI_ATTRIB_CONFIG_CAVEAT: if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG) glxValue = GLX_NON_CONFORMANT_CONFIG; else if (value & __DRI_ATTRIB_SLOW_BIT) glxValue = GLX_SLOW_CONFIG; else glxValue = GLX_NONE; if (glxValue != config->visualRating) { if (config->visualRating == GLX_NONE) { static int warned; if (!warned) { DebugMessageF("Not downgrading visual rating\n"); warned = 1; } } else { return GL_FALSE; } } break; case __DRI_ATTRIB_AUX_BUFFERS: if (!scalarEqual(config, attrib, value)) { static int warned; if (!warned) { DebugMessageF("Disabling server's aux buffer support\n"); warned = 1; } config->numAuxBuffers = 0; } break; case __DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE: if (!scalarEqual(config, attrib, value)) { static int warned; if (!warned) { DebugMessageF("Disabling server's tfp mipmap support\n"); warned = 1; } config->bindToMipmapTexture = 0; } break; default: if (!scalarEqual(config, attrib, value)) return GL_FALSE; } } return GL_TRUE; } static struct glx_config * createDriMode(const __DRIcoreExtension * core, struct glx_config *config, const __DRIconfig **driConfigs) { __GLXDRIconfigPrivate *driConfig; int i; for (i = 0; driConfigs[i]; i++) { if (driConfigEqual(core, config, driConfigs[i])) break; } if (driConfigs[i] == NULL) return NULL; driConfig = malloc(sizeof *driConfig); if (driConfig == NULL) return NULL; driConfig->base = *config; driConfig->driConfig = driConfigs[i]; return &driConfig->base; } _X_HIDDEN struct glx_config * driConvertConfigs(const __DRIcoreExtension * core, struct glx_config *configs, const __DRIconfig **driConfigs) { struct glx_config head, *tail, *m; tail = &head; head.next = NULL; for (m = configs; m; m = m->next) { tail->next = createDriMode(core, m, driConfigs); if (tail->next == NULL) { /* no matching dri config for m */ continue; } tail = tail->next; } return head.next; } _X_HIDDEN void driDestroyConfigs(const __DRIconfig **configs) { int i; for (i = 0; configs[i]; i++) free((__DRIconfig *) configs[i]); free(configs); } static struct glx_config * driInferDrawableConfig(struct glx_screen *psc, GLXDrawable draw) { unsigned int fbconfig = 0; xcb_get_window_attributes_cookie_t cookie = { 0 }; xcb_get_window_attributes_reply_t *attr = NULL; xcb_connection_t *conn = XGetXCBConnection(psc->dpy); /* In practice here, either the XID is a bare Window or it was created * by some other client. First let's see if the X server can tell us * the answer. Xorg first added GLX_EXT_no_config_context in 1.20, where * this usually works except for bare Windows that haven't been made * current yet. */ if (__glXGetDrawableAttribute(psc->dpy, draw, GLX_FBCONFIG_ID, &fbconfig)) { return glx_config_find_fbconfig(psc->configs, fbconfig); } /* Well this had better be a Window then. Figure out its visual and * then find the corresponding GLX visual. */ cookie = xcb_get_window_attributes(conn, draw); attr = xcb_get_window_attributes_reply(conn, cookie, NULL); if (attr) { uint32_t vid = attr->visual; free(attr); return glx_config_find_visual(psc->visuals, vid); } return NULL; } _X_HIDDEN __GLXDRIdrawable * driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable) { struct glx_display *const priv = __glXInitialize(gc->psc->dpy); __GLXDRIdrawable *pdraw; struct glx_screen *psc; struct glx_config *config = gc->config; if (priv == NULL) return NULL; if (glxDrawable == None) return NULL; psc = priv->screens[gc->screen]; if (priv->drawHash == NULL) return NULL; if (__glxHashLookup(priv->drawHash, glxDrawable, (void *) &pdraw) == 0) { pdraw->refcount ++; return pdraw; } /* if this is a no-config context, infer the fbconfig from the drawable */ if (config == NULL) config = driInferDrawableConfig(gc->psc, glxDrawable); if (config == NULL) return NULL; pdraw = psc->driScreen->createDrawable(psc, glxDrawable, glxDrawable, config); if (pdraw == NULL) { ErrorMessageF("failed to create drawable\n"); return NULL; } if (__glxHashInsert(priv->drawHash, glxDrawable, pdraw)) { (*pdraw->destroyDrawable) (pdraw); return NULL; } pdraw->refcount = 1; return pdraw; } _X_HIDDEN void driReleaseDrawables(struct glx_context *gc) { const struct glx_display *priv = gc->psc->display; __GLXDRIdrawable *pdraw; if (priv == NULL) return; if (__glxHashLookup(priv->drawHash, gc->currentDrawable, (void *) &pdraw) == 0) { if (pdraw->drawable == pdraw->xDrawable) { pdraw->refcount --; if (pdraw->refcount == 0) { pdraw->destroyDrawable(pdraw); __glxHashDelete(priv->drawHash, gc->currentDrawable); } } } if (__glxHashLookup(priv->drawHash, gc->currentReadable, (void *) &pdraw) == 0) { if (pdraw->drawable == pdraw->xDrawable) { pdraw->refcount --; if (pdraw->refcount == 0) { pdraw->destroyDrawable(pdraw); __glxHashDelete(priv->drawHash, gc->currentReadable); } } } gc->currentDrawable = None; gc->currentReadable = None; } _X_HIDDEN int dri_convert_glx_attribs(unsigned num_attribs, const uint32_t *attribs, struct dri_ctx_attribs *dca) { unsigned i; int no_error = 0; uint32_t profile = GLX_CONTEXT_CORE_PROFILE_BIT_ARB; dca->major_ver = 1; dca->minor_ver = 0; dca->render_type = GLX_RGBA_TYPE; dca->reset = __DRI_CTX_RESET_NO_NOTIFICATION; dca->release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH; dca->flags = 0; dca->api = __DRI_API_OPENGL; if (num_attribs == 0) return __DRI_CTX_ERROR_SUCCESS; /* This is actually an internal error, but what the heck. */ if (attribs == NULL) return __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; for (i = 0; i < num_attribs; i++) { switch (attribs[i * 2]) { case GLX_CONTEXT_MAJOR_VERSION_ARB: dca->major_ver = attribs[i * 2 + 1]; break; case GLX_CONTEXT_MINOR_VERSION_ARB: dca->minor_ver = attribs[i * 2 + 1]; break; case GLX_CONTEXT_FLAGS_ARB: dca->flags = attribs[i * 2 + 1]; break; case GLX_CONTEXT_OPENGL_NO_ERROR_ARB: no_error = attribs[i * 2 + 1]; break; case GLX_CONTEXT_PROFILE_MASK_ARB: profile = attribs[i * 2 + 1]; break; case GLX_RENDER_TYPE: dca->render_type = attribs[i * 2 + 1]; break; case GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB: switch (attribs[i * 2 + 1]) { case GLX_NO_RESET_NOTIFICATION_ARB: dca->reset = __DRI_CTX_RESET_NO_NOTIFICATION; break; case GLX_LOSE_CONTEXT_ON_RESET_ARB: dca->reset = __DRI_CTX_RESET_LOSE_CONTEXT; break; default: return __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; } break; case GLX_CONTEXT_RELEASE_BEHAVIOR_ARB: switch (attribs[i * 2 + 1]) { case GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB: dca->release = __DRI_CTX_RELEASE_BEHAVIOR_NONE; break; case GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB: dca->release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH; break; default: return __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; } break; case GLX_SCREEN: /* Implies GLX_EXT_no_config_context */ dca->render_type = GLX_DONT_CARE; break; default: /* If an unknown attribute is received, fail. */ return __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; } } if (no_error) { dca->flags |= __DRI_CTX_FLAG_NO_ERROR; } switch (profile) { case GLX_CONTEXT_CORE_PROFILE_BIT_ARB: /* This is the default value, but there are no profiles before OpenGL * 3.2. The GLX_ARB_create_context_profile spec says: * * "If the requested OpenGL version is less than 3.2, * GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality * of the context is determined solely by the requested version." */ dca->api = (dca->major_ver > 3 || (dca->major_ver == 3 && dca->minor_ver >= 2)) ? __DRI_API_OPENGL_CORE : __DRI_API_OPENGL; break; case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB: dca->api = __DRI_API_OPENGL; break; case GLX_CONTEXT_ES_PROFILE_BIT_EXT: if (dca->major_ver >= 3) dca->api = __DRI_API_GLES3; else if (dca->major_ver == 2 && dca->minor_ver == 0) dca->api = __DRI_API_GLES2; else if (dca->major_ver == 1 && dca->minor_ver < 2) dca->api = __DRI_API_GLES; else { return __DRI_CTX_ERROR_BAD_API; } break; default: return __DRI_CTX_ERROR_BAD_API; } /* Unknown flag value */ if (dca->flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS | __DRI_CTX_FLAG_NO_ERROR)) return __DRI_CTX_ERROR_UNKNOWN_FLAG; /* There are no forward-compatible contexts before OpenGL 3.0. The * GLX_ARB_create_context spec says: * * "Forward-compatible contexts are defined only for OpenGL versions * 3.0 and later." */ if (dca->major_ver < 3 && (dca->flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) return __DRI_CTX_ERROR_BAD_FLAG; if (dca->major_ver >= 3 && dca->render_type == GLX_COLOR_INDEX_TYPE) return __DRI_CTX_ERROR_BAD_FLAG; return __DRI_CTX_ERROR_SUCCESS; } _X_HIDDEN bool dri2_check_no_error(uint32_t flags, struct glx_context *share_context, int major, unsigned *error) { Bool noError = flags & __DRI_CTX_FLAG_NO_ERROR; /* The KHR_no_error specs say: * * Requires OpenGL ES 2.0 or OpenGL 2.0. */ if (noError && major < 2) { *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; return false; } /* The GLX_ARB_create_context_no_error specs say: * * BadMatch is generated if the value of GLX_CONTEXT_OPENGL_NO_ERROR_ARB * used to create does not match the value of * GLX_CONTEXT_OPENGL_NO_ERROR_ARB for the context being created. */ if (share_context && !!share_context->noError != !!noError) { *error = __DRI_CTX_ERROR_BAD_FLAG; return false; } /* The GLX_ARB_create_context_no_error specs say: * * BadMatch is generated if the GLX_CONTEXT_OPENGL_NO_ERROR_ARB is TRUE at * the same time as a debug or robustness context is specified. * */ if (noError && ((flags & __DRI_CTX_FLAG_DEBUG) || (flags & __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS))) { *error = __DRI_CTX_ERROR_BAD_FLAG; return false; } return true; } struct glx_context * dri_common_create_context(struct glx_screen *base, struct glx_config *config_base, struct glx_context *shareList, int renderType) { unsigned int error; uint32_t attribs[2] = { GLX_RENDER_TYPE, renderType }; return base->vtable->create_context_attribs(base, config_base, shareList, 1, attribs, &error); } /* * Given a display pointer and screen number, determine the name of * the DRI driver for the screen (i.e., "i965", "radeon", "nouveau", etc). * Return True for success, False for failure. */ static Bool driGetDriverName(Display * dpy, int scrNum, char **driverName) { struct glx_screen *glx_screen = GetGLXScreenConfigs(dpy, scrNum); if (!glx_screen || !glx_screen->vtable->get_driver_name) return False; *driverName = glx_screen->vtable->get_driver_name(glx_screen); return True; } /* * Exported function for querying the DRI driver for a given screen. * * The returned char pointer points to a static array that will be * overwritten by subsequent calls. */ _GLX_PUBLIC const char * glXGetScreenDriver(Display * dpy, int scrNum) { static char ret[32]; char *driverName; if (driGetDriverName(dpy, scrNum, &driverName)) { int len; if (!driverName) return NULL; len = strlen(driverName); if (len >= 31) return NULL; memcpy(ret, driverName, len + 1); free(driverName); return ret; } return NULL; } /* glXGetDriverConfig must return a pointer with a static lifetime. To avoid * keeping drivers loaded and other leaks, we keep a cache of results here that * is cleared by an atexit handler. */ struct driver_config_entry { struct driver_config_entry *next; char *driverName; char *config; }; static pthread_mutex_t driver_config_mutex = PTHREAD_MUTEX_INITIALIZER; static struct driver_config_entry *driver_config_cache = NULL; /* Called as an atexit function. Otherwise, this would have to be called with * driver_config_mutex locked. */ static void clear_driver_config_cache() { while (driver_config_cache) { struct driver_config_entry *e = driver_config_cache; driver_config_cache = e->next; free(e->driverName); free(e->config); free(e); } } static char * get_driver_config(const char *driverName) { void *handle; char *config = NULL; const __DRIextension **extensions = driOpenDriver(driverName, &handle); if (extensions) { for (int i = 0; extensions[i]; i++) { if (strcmp(extensions[i]->name, __DRI_CONFIG_OPTIONS) != 0) continue; __DRIconfigOptionsExtension *ext = (__DRIconfigOptionsExtension *)extensions[i]; if (ext->base.version >= 2) config = ext->getXml(driverName); else config = strdup(ext->xml); break; } } if (!config) { /* Fall back to the old method */ config = dlsym(handle, "__driConfigOptions"); if (config) config = strdup(config); } dlclose(handle); return config; } /* * Exported function for obtaining a driver's option list (UTF-8 encoded XML). * * The returned char pointer points directly into the driver. Therefore * it should be treated as a constant. * * If the driver was not found or does not support configuration NULL is * returned. */ _GLX_PUBLIC const char * glXGetDriverConfig(const char *driverName) { struct driver_config_entry *e; pthread_mutex_lock(&driver_config_mutex); for (e = driver_config_cache; e; e = e->next) { if (strcmp(e->driverName, driverName) == 0) goto out; } e = malloc(sizeof(*e)); if (!e) goto out; e->config = get_driver_config(driverName); e->driverName = strdup(driverName); if (!e->config || !e->driverName) { free(e->config); free(e->driverName); free(e); e = NULL; goto out; } e->next = driver_config_cache; driver_config_cache = e; if (!e->next) atexit(clear_driver_config_cache); out: pthread_mutex_unlock(&driver_config_mutex); return e ? e->config : NULL; } #endif /* GLX_DIRECT_RENDERING */