diff options
Diffstat (limited to 'src/gallium/state_trackers/d3d1x/dxgi/src/dxgi_loader.cpp')
| -rw-r--r-- | src/gallium/state_trackers/d3d1x/dxgi/src/dxgi_loader.cpp | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/d3d1x/dxgi/src/dxgi_loader.cpp b/src/gallium/state_trackers/d3d1x/dxgi/src/dxgi_loader.cpp new file mode 100644 index 00000000000..e5ba309fe41 --- /dev/null +++ b/src/gallium/state_trackers/d3d1x/dxgi/src/dxgi_loader.cpp @@ -0,0 +1,206 @@ +/* + * Mesa 3-D graphics library + * Version: 7.9 + * + * Copyright (C) 2010 LunarG Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Authors: + * Chia-I Wu <olv@lunarg.com> + */ + +#include "dxgi_private.h" +#include <stdio.h> +extern "C" +{ +#include "state_tracker/drm_driver.h" +#include "util/u_dl.h" +} +#define PIPE_PREFIX "pipe_" + +static const char * +get_search_path(void) +{ + static const char *search_path; + + if (!search_path) { + static char buffer[1024]; + const char *p; + int ret; + + p = getenv("DXGI_DRIVERS_PATH"); + if(!p) + p = getenv("EGL_DRIVERS_PATH"); +#ifdef __unix__ + if (p && (geteuid() != getuid() || getegid() != getgid())) { + p = NULL; + } +#endif + + if (p) { + ret = snprintf(buffer, sizeof(buffer), + "%s:%s", p, DXGI_DRIVER_SEARCH_DIR); + if (ret > 0 && ret < (int)sizeof(buffer)) + search_path = buffer; + } + } + if (!search_path) + search_path = DXGI_DRIVER_SEARCH_DIR; + + return search_path; +} + +static void +for_each_colon_separated(const char *search_path, + bool (*loader)(const char *, size_t, void *), + void *loader_data) +{ + const char *cur, *next; + size_t len; + + cur = search_path; + while (cur) { + next = strchr(cur, ':'); + len = (next) ? next - cur : strlen(cur); + + if (!loader(cur, len, loader_data)) + break; + + cur = (next) ? next + 1 : NULL; + } +} + +void +for_each_in_search_path(bool (*callback)(const char *, size_t, void *), + void *callback_data) +{ + const char *search_path = get_search_path(); + for_each_colon_separated(search_path, callback, callback_data); +} + +static struct pipe_module { + boolean initialized; + char *name; + struct util_dl_library *lib; + const struct drm_driver_descriptor *drmdd; + struct pipe_screen *(*swrast_create_screen)(struct sw_winsys *); +} pipe_modules[16]; + +static bool +dlopen_pipe_module_cb(const char *dir, size_t len, void *callback_data) +{ + struct pipe_module *pmod = (struct pipe_module *) callback_data; + char path[1024]; + int ret; + + if (len) { + ret = snprintf(path, sizeof(path), + "%.*s/" PIPE_PREFIX "%s" UTIL_DL_EXT, len, dir, pmod->name); + } + else { + ret = snprintf(path, sizeof(path), + PIPE_PREFIX "%s" UTIL_DL_EXT, pmod->name); + } + if (ret > 0 && ret < (int)sizeof(path)) { + pmod->lib = util_dl_open(path); + } + + return !(pmod->lib); +} + +static bool +load_pipe_module(struct pipe_module *pmod, const char *name) +{ + pmod->name = strdup(name); + if (!pmod->name) + return FALSE; + + for_each_in_search_path(dlopen_pipe_module_cb, (void *) pmod); + if (pmod->lib) { + pmod->drmdd = (const struct drm_driver_descriptor *) + util_dl_get_proc_address(pmod->lib, "driver_descriptor"); + + /* sanity check on the name */ + if (pmod->drmdd && strcmp(pmod->drmdd->name, pmod->name) != 0) + pmod->drmdd = NULL; + + /* swrast */ + if (pmod->drmdd && !pmod->drmdd->driver_name) { + pmod->swrast_create_screen = + (struct pipe_screen *(*)(struct sw_winsys *)) + util_dl_get_proc_address(pmod->lib, "swrast_create_screen"); + if (!pmod->swrast_create_screen) + pmod->drmdd = NULL; + } + + if (!pmod->drmdd) { + util_dl_close(pmod->lib); + pmod->lib = NULL; + } + } + + return (pmod->drmdd != NULL); +} + + +static struct pipe_module * +get_pipe_module(const char *name) +{ + struct pipe_module *pmod = NULL; + unsigned i; + + if (!name) + return NULL; + + for (i = 0; i < sizeof(pipe_modules) / sizeof(pipe_modules[0]); i++) { + if (!pipe_modules[i].initialized || + strcmp(pipe_modules[i].name, name) == 0) { + pmod = &pipe_modules[i]; + break; + } + } + if (!pmod) + return NULL; + + if (!pmod->initialized) { + load_pipe_module(pmod, name); + pmod->initialized = TRUE; + } + + return pmod; +} + +struct native_display; + +struct pipe_screen * +dxgi_loader_create_drm_screen(struct native_display* dpy, const char *name, int fd) +{ + struct pipe_module *pmod = get_pipe_module(name); + return (pmod && pmod->drmdd && pmod->drmdd->create_screen) ? + pmod->drmdd->create_screen(fd) : NULL; +} + +struct pipe_screen * +dxgi_loader_create_sw_screen(struct native_display* dpy, struct sw_winsys *ws) +{ + struct pipe_module *pmod = get_pipe_module("swrast"); + return (pmod && pmod->swrast_create_screen) ? + pmod->swrast_create_screen(ws) : NULL; +} |