+/**************************************************************************
+ *
+ * Copyright 2008 VMware, Inc.
+ * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
+ * Copyright 2010-2011 LunarG, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 (including the
+ * next paragraph) 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.
+ *
+ **************************************************************************/
+
+
/**
* Functions for choosing and opening/loading device drivers.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
-#include "eglconfig.h"
-#include "eglcontext.h"
+#include "c11/threads.h"
+
#include "egldefines.h"
#include "egldisplay.h"
#include "egldriver.h"
-#include "eglglobals.h"
#include "egllog.h"
-#include "eglmisc.h"
-#include "eglmode.h"
-#include "eglscreen.h"
-#include "eglstring.h"
-#include "eglsurface.h"
-
-#if defined(_EGL_PLATFORM_X)
-#include <dlfcn.h>
-#endif
-
-
-/**
- * Wrappers for dlopen/dlclose()
- */
-#if defined(_EGL_PLATFORM_WINDOWS)
-
-
-/* XXX Need to decide how to do dynamic name lookup on Windows */
-static const char DefaultDriverName[] = "TBD";
-
-typedef HMODULE lib_handle;
-
-static HMODULE
-open_library(const char *filename)
-{
- return LoadLibrary(filename);
-}
-
-static void
-close_library(HMODULE lib)
-{
- FreeLibrary(lib);
-}
-
-
-#elif defined(_EGL_PLATFORM_X)
-
-
-static const char DefaultDriverName[] = "egl_softpipe";
-
-typedef void * lib_handle;
-
-static void *
-open_library(const char *filename)
-{
- return dlopen(filename, RTLD_LAZY);
-}
-
-static void
-close_library(void *lib)
-{
- dlclose(lib);
-}
-
-#else /* _EGL_PLATFORM_NO_OS */
-
-static const char DefaultDriverName[] = "builtin";
-
-typedef void *lib_handle;
-
-static INLINE void *
-open_library(const char *filename)
-{
- return (void *) filename;
-}
-
-static INLINE void
-close_library(void *lib)
-{
-}
-
-
-#endif
-
-
-/**
- * Choose a driver for a given display.
- * The caller may free() the returned strings.
- */
-static char *
-_eglChooseDriver(_EGLDisplay *dpy, char **argsRet)
-{
- char *path = NULL;
- const char *args = NULL;
- const char *suffix = NULL;
- const char *p;
-
- path = getenv("EGL_DRIVER");
- if (path)
- path = _eglstrdup(path);
-
-#if defined(_EGL_PLATFORM_X)
- if (!path && dpy && dpy->NativeDisplay) {
- /* assume (wrongly!) that the native display is a display string */
- path = _eglSplitDisplayString((const char *) dpy->NativeDisplay, &args);
- }
- suffix = "so";
-#elif defined(_EGL_PLATFORM_WINDOWS)
- suffix = "dll";
-#else /* _EGL_PLATFORM_NO_OS */
- if (path) {
- /* force the use of the default driver */
- _eglLog(_EGL_DEBUG, "ignore EGL_DRIVER");
- free(path);
- path = NULL;
- }
- suffix = NULL;
-#endif
-
- if (!path)
- path = _eglstrdup(DefaultDriverName);
-
- /* append suffix if there isn't */
- p = strrchr(path, '.');
- if (!p && suffix) {
- size_t len = strlen(path);
- char *tmp = malloc(len + strlen(suffix) + 2);
- if (tmp) {
- memcpy(tmp, path, len);
- tmp[len++] = '.';
- tmp[len] = '\0';
- strcat(tmp + len, suffix);
-
- free(path);
- path = tmp;
- }
- }
-
- if (argsRet)
- *argsRet = (args) ? _eglstrdup(args) : NULL;
-
- return path;
-}
-
-
-/**
- * Open the named driver and find its bootstrap function: _eglMain().
- */
-static _EGLMain_t
-_eglOpenLibrary(const char *driverPath, lib_handle *handle)
-{
- lib_handle lib;
- _EGLMain_t mainFunc = NULL;
- const char *error = "unknown error";
-
- assert(driverPath);
-
- _eglLog(_EGL_DEBUG, "dlopen(%s)", driverPath);
- lib = open_library(driverPath);
-
-#if defined(_EGL_PLATFORM_WINDOWS)
- /* XXX untested */
- if (lib)
- mainFunc = (_EGLMain_t) GetProcAddress(lib, "_eglMain");
-#elif defined(_EGL_PLATFORM_X)
- if (lib) {
- mainFunc = (_EGLMain_t) dlsym(lib, "_eglMain");
- if (!mainFunc)
- error = dlerror();
- }
- else {
- error = dlerror();
- }
-#else /* _EGL_PLATFORM_NO_OS */
- /* must be the default driver name */
- if (strcmp(driverPath, DefaultDriverName) == 0)
- mainFunc = (_EGLMain_t) _eglMain;
- else
- error = "not builtin driver";
-#endif
-
- if (!lib) {
- _eglLog(_EGL_WARNING, "Could not open driver %s (%s)",
- driverPath, error);
- if (!getenv("EGL_DRIVER"))
- _eglLog(_EGL_WARNING,
- "The driver can be overridden by setting EGL_DRIVER");
- return NULL;
- }
-
- if (!mainFunc) {
- _eglLog(_EGL_WARNING, "_eglMain not found in %s (%s)",
- driverPath, error);
- if (lib)
- close_library(lib);
- return NULL;
- }
-
- *handle = lib;
- return mainFunc;
-}
-
-
-/**
- * Load the named driver. The path and args passed will be
- * owned by the driver and freed.
- */
-static _EGLDriver *
-_eglLoadDriver(char *path, char *args)
-{
- _EGLMain_t mainFunc;
- lib_handle lib;
- _EGLDriver *drv = NULL;
-
- mainFunc = _eglOpenLibrary(path, &lib);
- if (!mainFunc)
- return NULL;
-
- drv = mainFunc(args);
- if (!drv) {
- if (lib)
- close_library(lib);
- return NULL;
- }
-
- if (!drv->Name) {
- _eglLog(_EGL_WARNING, "Driver loaded from %s has no name", path);
- drv->Name = "UNNAMED";
- }
- drv->Path = path;
- drv->Args = args;
- drv->LibHandle = lib;
-
- return drv;
-}
+#include "util/debug.h"
+extern const _EGLDriver _eglDriver;
/**
- * Match a display to a preloaded driver.
+ * Initialize the display using the driver's function.
+ * If the initialisation fails, try again using only software rendering.
*/
-static _EGLDriver *
-_eglMatchDriver(_EGLDisplay *dpy)
+bool
+_eglInitializeDisplay(_EGLDisplay *disp)
{
- _EGLDriver *defaultDriver = NULL;
- EGLint i;
+ assert(!disp->Initialized);
- for (i = 0; i < _eglGlobal.NumDrivers; i++) {
- _EGLDriver *drv = _eglGlobal.Drivers[i];
+ /* set options */
+ disp->Options.ForceSoftware =
+ env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false);
+ if (disp->Options.ForceSoftware)
+ _eglLog(_EGL_DEBUG, "Found 'LIBGL_ALWAYS_SOFTWARE' set, will use a CPU renderer");
- /* display specifies a driver */
- if (dpy->DriverName) {
- if (strcmp(dpy->DriverName, drv->Name) == 0)
- return drv;
- }
- else if (drv->Probe) {
- if (drv->Probe(drv, dpy))
- return drv;
- }
- else {
- if (!defaultDriver)
- defaultDriver = drv;
- }
+ if (_eglDriver.Initialize(disp)) {
+ disp->Driver = &_eglDriver;
+ disp->Initialized = EGL_TRUE;
+ return true;
}
- return defaultDriver;
-}
-
-
-/**
- * Load a driver and save it.
- */
-const char *
-_eglPreloadDriver(_EGLDisplay *dpy)
-{
- char *path, *args;
- _EGLDriver *drv;
- EGLint i;
-
- path = _eglChooseDriver(dpy, &args);
- if (!path)
- return NULL;
-
- for (i = 0; i < _eglGlobal.NumDrivers; i++) {
- drv = _eglGlobal.Drivers[i];
- if (strcmp(drv->Path, path) == 0) {
- _eglLog(_EGL_DEBUG, "Driver %s is already preloaded",
- drv->Name);
- free(path);
- if (args)
- free(args);
- return drv->Name;
- }
- }
+ if (disp->Options.ForceSoftware)
+ return false;
- drv = _eglLoadDriver(path, args);
- if (!drv)
- return NULL;
+ disp->Options.ForceSoftware = EGL_TRUE;
+ if (!_eglDriver.Initialize(disp))
+ return false;
- _eglGlobal.Drivers[_eglGlobal.NumDrivers++] = drv;
-
- return drv->Name;
-}
-
-
-/**
- * Open a preloaded driver.
- */
-_EGLDriver *
-_eglOpenDriver(_EGLDisplay *dpy)
-{
- _EGLDriver *drv = _eglMatchDriver(dpy);
- return drv;
-}
-
-
-/**
- * Close a preloaded driver.
- */
-EGLBoolean
-_eglCloseDriver(_EGLDriver *drv, _EGLDisplay *dpy)
-{
- return EGL_TRUE;
+ disp->Driver = &_eglDriver;
+ disp->Initialized = EGL_TRUE;
+ return true;
}
-
-/**
- * Unload preloaded drivers.
- */
-void
-_eglUnloadDrivers(void)
+__eglMustCastToProperFunctionPointerType
+_eglGetDriverProc(const char *procname)
{
- EGLint i;
- for (i = 0; i < _eglGlobal.NumDrivers; i++) {
- _EGLDriver *drv = _eglGlobal.Drivers[i];
- lib_handle handle = drv->LibHandle;
-
- if (drv->Path)
- free((char *) drv->Path);
- if (drv->Args)
- free((char *) drv->Args);
-
- /* destroy driver */
- if (drv->Unload)
- drv->Unload(drv);
-
- if (handle)
- close_library(handle);
- _eglGlobal.Drivers[i] = NULL;
- }
-
- _eglGlobal.NumDrivers = 0;
-}
-
-
-/**
- * Given a display handle, return the _EGLDriver for that display.
- */
-_EGLDriver *
-_eglLookupDriver(EGLDisplay dpy)
-{
- _EGLDisplay *d = _eglLookupDisplay(dpy);
- if (d)
- return d->Driver;
- else
- return NULL;
-}
-
-
-/**
- * Plug all the available fallback routines into the given driver's
- * dispatch table.
- */
-void
-_eglInitDriverFallbacks(_EGLDriver *drv)
-{
- /* If a pointer is set to NULL, then the device driver _really_ has
- * to implement it.
- */
- drv->API.Initialize = NULL;
- drv->API.Terminate = NULL;
-
- drv->API.GetConfigs = _eglGetConfigs;
- drv->API.ChooseConfig = _eglChooseConfig;
- drv->API.GetConfigAttrib = _eglGetConfigAttrib;
-
- drv->API.CreateContext = _eglCreateContext;
- drv->API.DestroyContext = _eglDestroyContext;
- drv->API.MakeCurrent = _eglMakeCurrent;
- drv->API.QueryContext = _eglQueryContext;
-
- drv->API.CreateWindowSurface = _eglCreateWindowSurface;
- drv->API.CreatePixmapSurface = _eglCreatePixmapSurface;
- drv->API.CreatePbufferSurface = _eglCreatePbufferSurface;
- drv->API.DestroySurface = _eglDestroySurface;
- drv->API.QuerySurface = _eglQuerySurface;
- drv->API.SurfaceAttrib = _eglSurfaceAttrib;
- drv->API.BindTexImage = _eglBindTexImage;
- drv->API.ReleaseTexImage = _eglReleaseTexImage;
- drv->API.SwapInterval = _eglSwapInterval;
- drv->API.SwapBuffers = _eglSwapBuffers;
- drv->API.CopyBuffers = _eglCopyBuffers;
-
- drv->API.QueryString = _eglQueryString;
- drv->API.WaitClient = _eglWaitClient;
- drv->API.WaitNative = _eglWaitNative;
-
-#ifdef EGL_MESA_screen_surface
- drv->API.ChooseModeMESA = _eglChooseModeMESA;
- drv->API.GetModesMESA = _eglGetModesMESA;
- drv->API.GetModeAttribMESA = _eglGetModeAttribMESA;
- drv->API.GetScreensMESA = _eglGetScreensMESA;
- drv->API.CreateScreenSurfaceMESA = _eglCreateScreenSurfaceMESA;
- drv->API.ShowScreenSurfaceMESA = _eglShowScreenSurfaceMESA;
- drv->API.ScreenPositionMESA = _eglScreenPositionMESA;
- drv->API.QueryScreenMESA = _eglQueryScreenMESA;
- drv->API.QueryScreenSurfaceMESA = _eglQueryScreenSurfaceMESA;
- drv->API.QueryScreenModeMESA = _eglQueryScreenModeMESA;
- drv->API.QueryModeStringMESA = _eglQueryModeStringMESA;
-#endif /* EGL_MESA_screen_surface */
-
-#ifdef EGL_VERSION_1_2
- drv->API.CreatePbufferFromClientBuffer = _eglCreatePbufferFromClientBuffer;
-#endif /* EGL_VERSION_1_2 */
-}
-
-
-
-/**
- * Try to determine which EGL APIs (OpenGL, OpenGL ES, OpenVG, etc)
- * are supported on the system by looking for standard library names.
- */
-EGLint
-_eglFindAPIs(void)
-{
- EGLint mask = 0x0;
- lib_handle lib;
-#if defined(_EGL_PLATFORM_WINDOWS)
- /* XXX not sure about these names */
- const char *es1_libname = "libGLESv1_CM.dll";
- const char *es2_libname = "libGLESv2.dll";
- const char *gl_libname = "OpenGL32.dll";
- const char *vg_libname = "libOpenVG.dll";
-#elif defined(_EGL_PLATFORM_X)
- const char *es1_libname = "libGLESv1_CM.so";
- const char *es2_libname = "libGLESv2.so";
- const char *gl_libname = "libGL.so";
- const char *vg_libname = "libOpenVG.so";
-#else /* _EGL_PLATFORM_NO_OS */
- const char *es1_libname = NULL;
- const char *es2_libname = NULL;
- const char *gl_libname = NULL;
- const char *vg_libname = NULL;
-#endif
-
- if ((lib = open_library(es1_libname))) {
- close_library(lib);
- mask |= EGL_OPENGL_ES_BIT;
- }
-
- if ((lib = open_library(es2_libname))) {
- close_library(lib);
- mask |= EGL_OPENGL_ES2_BIT;
- }
-
- if ((lib = open_library(gl_libname))) {
- close_library(lib);
- mask |= EGL_OPENGL_BIT;
- }
-
- if ((lib = open_library(vg_libname))) {
- close_library(lib);
- mask |= EGL_OPENVG_BIT;
- }
+ if (_eglDriver.GetProcAddress)
+ return _eglDriver.GetProcAddress(procname);
- return mask;
+ return NULL;
}
projects / mesa.git / blobdiff