| /* |
| * 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 <kevin@precisioninsight.com> |
| * Brian Paul <brian@precisioninsight.com> |
| * Kristian Høgsberg (krh@redhat.com) |
| */ |
| |
| #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) |
| |
| #include <unistd.h> |
| #include <dlfcn.h> |
| #include <stdarg.h> |
| #include "glxclient.h" |
| #include "dri_common.h" |
| #include "loader.h" |
| #include <X11/Xlib-xcb.h> |
| #include <xcb/xproto.h> |
| |
| #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; |
| |
| case __DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE: |
| if (!scalarEqual(config, attrib, value)) { |
| static int warned; |
| if (!warned) { |
| DebugMessageF("Disabling server's sRGB support\n"); |
| warned = 1; |
| } |
| config->sRGBCapable = 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 bool |
| dri2_convert_glx_attribs(unsigned num_attribs, const uint32_t *attribs, |
| unsigned *major_ver, unsigned *minor_ver, |
| uint32_t *render_type, uint32_t *flags, unsigned *api, |
| int *reset, int *release, unsigned *error) |
| { |
| unsigned i; |
| bool got_profile = false; |
| int no_error = 0; |
| uint32_t profile; |
| |
| *major_ver = 1; |
| *minor_ver = 0; |
| *render_type = GLX_RGBA_TYPE; |
| *reset = __DRI_CTX_RESET_NO_NOTIFICATION; |
| *release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH; |
| *flags = 0; |
| *api = __DRI_API_OPENGL; |
| |
| if (num_attribs == 0) { |
| return true; |
| } |
| |
| /* This is actually an internal error, but what the heck. |
| */ |
| if (attribs == NULL) { |
| *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; |
| return false; |
| } |
| |
| for (i = 0; i < num_attribs; i++) { |
| switch (attribs[i * 2]) { |
| case GLX_CONTEXT_MAJOR_VERSION_ARB: |
| *major_ver = attribs[i * 2 + 1]; |
| break; |
| case GLX_CONTEXT_MINOR_VERSION_ARB: |
| *minor_ver = attribs[i * 2 + 1]; |
| break; |
| case GLX_CONTEXT_FLAGS_ARB: |
| *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]; |
| got_profile = true; |
| break; |
| case GLX_RENDER_TYPE: |
| *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: |
| *reset = __DRI_CTX_RESET_NO_NOTIFICATION; |
| break; |
| case GLX_LOSE_CONTEXT_ON_RESET_ARB: |
| *reset = __DRI_CTX_RESET_LOSE_CONTEXT; |
| break; |
| default: |
| *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; |
| return false; |
| } |
| break; |
| case GLX_CONTEXT_RELEASE_BEHAVIOR_ARB: |
| switch (attribs[i * 2 + 1]) { |
| case GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB: |
| *release = __DRI_CTX_RELEASE_BEHAVIOR_NONE; |
| break; |
| case GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB: |
| *release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH; |
| break; |
| default: |
| *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; |
| return false; |
| } |
| break; |
| case GLX_SCREEN: |
| /* Implies GLX_EXT_no_config_context */ |
| *render_type = GLX_DONT_CARE; |
| break; |
| default: |
| /* If an unknown attribute is received, fail. |
| */ |
| *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE; |
| return false; |
| } |
| } |
| |
| if (no_error) { |
| *flags |= __DRI_CTX_FLAG_NO_ERROR; |
| } |
| |
| if (!got_profile) { |
| if (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2)) |
| *api = __DRI_API_OPENGL_CORE; |
| } else { |
| switch (profile) { |
| case GLX_CONTEXT_CORE_PROFILE_BIT_ARB: |
| /* 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." |
| */ |
| *api = (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2)) |
| ? __DRI_API_OPENGL_CORE : __DRI_API_OPENGL; |
| break; |
| case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB: |
| *api = __DRI_API_OPENGL; |
| break; |
| case GLX_CONTEXT_ES_PROFILE_BIT_EXT: |
| if (*major_ver >= 3) |
| *api = __DRI_API_GLES3; |
| else if (*major_ver == 2 && *minor_ver == 0) |
| *api = __DRI_API_GLES2; |
| else if (*major_ver == 1 && *minor_ver < 2) |
| *api = __DRI_API_GLES; |
| else { |
| *error = __DRI_CTX_ERROR_BAD_API; |
| return false; |
| } |
| break; |
| default: |
| *error = __DRI_CTX_ERROR_BAD_API; |
| return false; |
| } |
| } |
| |
| /* Unknown flag value. |
| */ |
| if (*flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE |
| | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS |
| | __DRI_CTX_FLAG_NO_ERROR)) { |
| *error = __DRI_CTX_ERROR_UNKNOWN_FLAG; |
| return false; |
| } |
| |
| /* 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 (*major_ver < 3 && (*flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) { |
| *error = __DRI_CTX_ERROR_BAD_FLAG; |
| return false; |
| } |
| |
| if (*major_ver >= 3 && *render_type == GLX_COLOR_INDEX_TYPE) { |
| *error = __DRI_CTX_ERROR_BAD_FLAG; |
| return false; |
| } |
| |
| *error = __DRI_CTX_ERROR_SUCCESS; |
| return true; |
| } |
| |
| _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 <share_context> 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 */ |
