+/**************************************************************************
+ *
+ * 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 related to EGLDisplay.
*/
#include <stdlib.h>
#include <string.h>
#include "eglcontext.h"
+#include "eglcurrent.h"
#include "eglsurface.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "eglglobals.h"
-#include "eglstring.h"
#include "eglmutex.h"
#include "egllog.h"
+/* Includes for _eglNativePlatformDetectNativeDisplay */
+#ifdef HAVE_MINCORE
+#include <unistd.h>
+#include <sys/mman.h>
+#endif
+#ifdef HAVE_WAYLAND_PLATFORM
+#include <wayland-client.h>
+#endif
+#ifdef HAVE_DRM_PLATFORM
+#include <gbm.h>
+#endif
+#ifdef HAVE_FBDEV_PLATFORM
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#endif
+
/**
- * Finish display management.
+ * Map --with-egl-platforms names to platform types.
*/
-void
-_eglFiniDisplay(void)
-{
- _EGLDisplay *dpyList, *dpy;
+static const struct {
+ _EGLPlatformType platform;
+ const char *name;
+} egl_platforms[_EGL_NUM_PLATFORMS] = {
+ { _EGL_PLATFORM_WINDOWS, "gdi" },
+ { _EGL_PLATFORM_X11, "x11" },
+ { _EGL_PLATFORM_WAYLAND, "wayland" },
+ { _EGL_PLATFORM_DRM, "drm" },
+ { _EGL_PLATFORM_FBDEV, "fbdev" },
+ { _EGL_PLATFORM_NULL, "null" },
+ { _EGL_PLATFORM_ANDROID, "android" }
+};
- /* atexit function is called with global mutex locked */
- dpyList = _eglGlobal.DisplayList;
- while (dpyList) {
- EGLint i;
- /* pop list head */
- dpy = dpyList;
- dpyList = dpyList->Next;
+/**
+ * Return the native platform by parsing EGL_PLATFORM.
+ */
+static _EGLPlatformType
+_eglGetNativePlatformFromEnv(void)
+{
+ _EGLPlatformType plat = _EGL_INVALID_PLATFORM;
+ const char *plat_name;
+ EGLint i;
- for (i = 0; i < _EGL_NUM_RESOURCES; i++) {
- if (dpy->ResourceLists[i]) {
- _eglLog(_EGL_DEBUG, "Display %p is destroyed with resources", dpy);
- break;
- }
- }
+ plat_name = getenv("EGL_PLATFORM");
+ /* try deprecated env variable */
+ if (!plat_name || !plat_name[0])
+ plat_name = getenv("EGL_DISPLAY");
+ if (!plat_name || !plat_name[0])
+ return _EGL_INVALID_PLATFORM;
- free(dpy);
+ for (i = 0; i < _EGL_NUM_PLATFORMS; i++) {
+ if (strcmp(egl_platforms[i].name, plat_name) == 0) {
+ plat = egl_platforms[i].platform;
+ break;
+ }
}
- _eglGlobal.DisplayList = NULL;
+
+ return plat;
}
/**
- * Allocate a new _EGLDisplay object for the given nativeDisplay handle.
- * We'll also try to determine the device driver name at this time.
- *
- * Note that nativeDisplay may be an X Display ptr, or a string.
+ * Perform validity checks on a generic pointer.
*/
-_EGLDisplay *
-_eglNewDisplay(EGLNativeDisplayType nativeDisplay)
+static EGLBoolean
+_eglPointerIsDereferencable(void *p)
{
- _EGLDisplay *dpy = (_EGLDisplay *) calloc(1, sizeof(_EGLDisplay));
- if (dpy) {
- dpy->NativeDisplay = nativeDisplay;
+#ifdef HAVE_MINCORE
+ uintptr_t addr = (uintptr_t) p;
+ unsigned char valid = 0;
+ const long page_size = getpagesize();
+
+ if (p == NULL)
+ return EGL_FALSE;
+
+ /* align addr to page_size */
+ addr &= ~(page_size - 1);
+
+ if (mincore((void *) addr, page_size, &valid) < 0) {
+ _eglLog(_EGL_DEBUG, "mincore failed: %m");
+ return EGL_FALSE;
}
- return dpy;
+
+ return (valid & 0x01) == 0x01;
+#else
+ return p != NULL;
+#endif
}
/**
- * Link a display to itself and return the handle of the link.
- * The handle can be passed to client directly.
+ * Try detecting native platform with the help of native display characteristcs.
*/
-EGLDisplay
-_eglLinkDisplay(_EGLDisplay *dpy)
+static _EGLPlatformType
+_eglNativePlatformDetectNativeDisplay(void *nativeDisplay)
{
- _eglLockMutex(_eglGlobal.Mutex);
+#ifdef HAVE_FBDEV_PLATFORM
+ struct stat buf;
+#endif
+
+ if (nativeDisplay == EGL_DEFAULT_DISPLAY)
+ return _EGL_INVALID_PLATFORM;
+
+#ifdef HAVE_FBDEV_PLATFORM
+ /* fbdev is the only platform that can be a file descriptor. */
+ if (fstat((intptr_t) nativeDisplay, &buf) == 0 && S_ISCHR(buf.st_mode))
+ return _EGL_PLATFORM_FBDEV;
+#endif
+
+ if (_eglPointerIsDereferencable(nativeDisplay)) {
+ void *first_pointer = *(void **) nativeDisplay;
+
+ (void) first_pointer; /* silence unused var warning */
+
+#ifdef HAVE_WAYLAND_PLATFORM
+ /* wl_display is a wl_proxy, which is a wl_object.
+ * wl_object's first element points to the interfacetype. */
+ if (first_pointer == &wl_display_interface)
+ return _EGL_PLATFORM_WAYLAND;
+#endif
+
+#ifdef HAVE_DRM_PLATFORM
+ /* gbm has a pointer to its constructor as first element. */
+ if (first_pointer == gbm_create_device)
+ return _EGL_PLATFORM_DRM;
+#endif
+
+#ifdef HAVE_X11_PLATFORM
+ /* If not matched to any other platform, fallback to x11. */
+ return _EGL_PLATFORM_X11;
+#endif
+ }
- dpy->Next = _eglGlobal.DisplayList;
- _eglGlobal.DisplayList = dpy;
+ return _EGL_INVALID_PLATFORM;
+}
- _eglUnlockMutex(_eglGlobal.Mutex);
- return (EGLDisplay) dpy;
+/**
+ * Return the native platform. It is the platform of the EGL native types.
+ */
+_EGLPlatformType
+_eglGetNativePlatform(void *nativeDisplay)
+{
+ static _EGLPlatformType native_platform = _EGL_INVALID_PLATFORM;
+ char *detection_method = NULL;
+
+ if (native_platform == _EGL_INVALID_PLATFORM) {
+ native_platform = _eglGetNativePlatformFromEnv();
+ detection_method = "environment overwrite";
+ if (native_platform == _EGL_INVALID_PLATFORM) {
+ native_platform = _eglNativePlatformDetectNativeDisplay(nativeDisplay);
+ detection_method = "autodetected";
+ if (native_platform == _EGL_INVALID_PLATFORM) {
+ native_platform = _EGL_NATIVE_PLATFORM;
+ detection_method = "build-time configuration";
+ }
+ }
+ }
+
+ if (detection_method != NULL)
+ _eglLog(_EGL_DEBUG, "Native platform type: %s (%s)",
+ egl_platforms[native_platform].name, detection_method);
+
+ return native_platform;
}
/**
- * Unlink a linked display from itself.
- * Accessing an unlinked display should generate EGL_BAD_DISPLAY error.
+ * Finish display management.
*/
void
-_eglUnlinkDisplay(_EGLDisplay *dpy)
+_eglFiniDisplay(void)
{
- _EGLDisplay *prev;
+ _EGLDisplay *dpyList, *dpy;
- _eglLockMutex(_eglGlobal.Mutex);
+ /* atexit function is called with global mutex locked */
+ dpyList = _eglGlobal.DisplayList;
+ while (dpyList) {
+ EGLint i;
- prev = _eglGlobal.DisplayList;
- if (prev != dpy) {
- while (prev) {
- if (prev->Next == dpy)
+ /* pop list head */
+ dpy = dpyList;
+ dpyList = dpyList->Next;
+
+ for (i = 0; i < _EGL_NUM_RESOURCES; i++) {
+ if (dpy->ResourceLists[i]) {
+ _eglLog(_EGL_DEBUG, "Display %p is destroyed with resources", dpy);
break;
- prev = prev->Next;
+ }
}
- assert(prev);
- prev->Next = dpy->Next;
- }
- else {
- _eglGlobal.DisplayList = dpy->Next;
- }
- _eglUnlockMutex(_eglGlobal.Mutex);
+ free(dpy);
+ }
+ _eglGlobal.DisplayList = NULL;
}
/**
- * Find the display corresponding to the specified native display id in all
- * linked displays.
+ * Find the display corresponding to the specified native display, or create a
+ * new one.
*/
_EGLDisplay *
-_eglFindDisplay(EGLNativeDisplayType nativeDisplay)
+_eglFindDisplay(_EGLPlatformType plat, void *plat_dpy)
{
_EGLDisplay *dpy;
+ if (plat == _EGL_INVALID_PLATFORM)
+ return NULL;
+
_eglLockMutex(_eglGlobal.Mutex);
+ /* search the display list first */
dpy = _eglGlobal.DisplayList;
while (dpy) {
- if (dpy->NativeDisplay == nativeDisplay) {
- _eglUnlockMutex(_eglGlobal.Mutex);
- return dpy;
- }
+ if (dpy->Platform == plat && dpy->PlatformDisplay == plat_dpy)
+ break;
dpy = dpy->Next;
}
+ /* create a new display */
+ if (!dpy) {
+ dpy = calloc(1, sizeof(_EGLDisplay));
+ if (dpy) {
+ _eglInitMutex(&dpy->Mutex);
+ dpy->Platform = plat;
+ dpy->PlatformDisplay = plat_dpy;
+
+ /* add to the display list */
+ dpy->Next = _eglGlobal.DisplayList;
+ _eglGlobal.DisplayList = dpy;
+ }
+ }
+
_eglUnlockMutex(_eglGlobal.Mutex);
- return NULL;
+ return dpy;
}
void
_eglCleanupDisplay(_EGLDisplay *disp)
{
- EGLint i;
-
if (disp->Configs) {
- for (i = 0; i < disp->NumConfigs; i++)
- free(disp->Configs[i]);
- free(disp->Configs);
+ _eglDestroyArray(disp->Configs, free);
disp->Configs = NULL;
- disp->NumConfigs = 0;
}
/* XXX incomplete */
}
-#ifndef _EGL_SKIP_HANDLE_CHECK
-
-
/**
* Return EGL_TRUE if the given handle is a valid handle to a display.
*/
}
-#endif /* !_EGL_SKIP_HANDLE_CHECK */
+/**
+ * Initialize a display resource. The size of the subclass object is
+ * specified.
+ *
+ * This is supposed to be called from the initializers of subclasses, such as
+ * _eglInitContext or _eglInitSurface.
+ */
+void
+_eglInitResource(_EGLResource *res, EGLint size, _EGLDisplay *dpy)
+{
+ memset(res, 0, size);
+ res->Display = dpy;
+ res->RefCount = 1;
+}
/**
- * Link a resource to a display.
+ * Increment reference count for the resource.
*/
void
-_eglLinkResource(_EGLResource *res, _EGLResourceType type, _EGLDisplay *dpy)
+_eglGetResource(_EGLResource *res)
{
- assert(!res->Display || res->Display == dpy);
+ assert(res && res->RefCount > 0);
+ /* hopefully a resource is always manipulated with its display locked */
+ res->RefCount++;
+}
+
+
+/**
+ * Decrement reference count for the resource.
+ */
+EGLBoolean
+_eglPutResource(_EGLResource *res)
+{
+ assert(res && res->RefCount > 0);
+ res->RefCount--;
+ return (!res->RefCount);
+}
+
+
+/**
+ * Link a resource to its display.
+ */
+void
+_eglLinkResource(_EGLResource *res, _EGLResourceType type)
+{
+ assert(res->Display);
- res->Display = dpy;
res->IsLinked = EGL_TRUE;
- res->Next = dpy->ResourceLists[type];
- dpy->ResourceLists[type] = res;
+ res->Next = res->Display->ResourceLists[type];
+ res->Display->ResourceLists[type] = res;
+ _eglGetResource(res);
}
}
res->Next = NULL;
- /* do not reset res->Display */
res->IsLinked = EGL_FALSE;
+ _eglPutResource(res);
+
+ /* We always unlink before destroy. The driver still owns a reference */
+ assert(res->RefCount);
+}
+
+#ifdef HAVE_X11_PLATFORM
+static EGLBoolean
+_eglParseX11DisplayAttribList(const EGLint *attrib_list)
+{
+ int i;
+
+ if (attrib_list == NULL) {
+ return EGL_TRUE;
+ }
+
+ for (i = 0; attrib_list[i] != EGL_NONE; i += 2) {
+ EGLint attrib = attrib_list[i];
+ EGLint value = attrib_list[i + 1];
+
+ /* EGL_EXT_platform_x11 recognizes exactly one attribute,
+ * EGL_PLATFORM_X11_SCREEN_EXT, which is optional.
+ *
+ * Mesa supports connecting to only the default screen, so we reject
+ * screen != 0.
+ */
+ if (attrib != EGL_PLATFORM_X11_SCREEN_EXT || value != 0) {
+ _eglError(EGL_BAD_ATTRIBUTE, "eglGetPlatformDisplay");
+ return EGL_FALSE;
+ }
+ }
+
+ return EGL_TRUE;
+}
+
+_EGLDisplay*
+_eglGetX11Display(Display *native_display,
+ const EGLint *attrib_list)
+{
+ if (!_eglParseX11DisplayAttribList(attrib_list)) {
+ return NULL;
+ }
+
+ return _eglFindDisplay(_EGL_PLATFORM_X11, native_display);
+}
+#endif /* HAVE_X11_PLATFORM */
+
+#ifdef HAVE_DRM_PLATFORM
+_EGLDisplay*
+_eglGetGbmDisplay(struct gbm_device *native_display,
+ const EGLint *attrib_list)
+{
+ /* EGL_MESA_platform_gbm recognizes no attributes. */
+ if (attrib_list != NULL && attrib_list[0] != EGL_NONE) {
+ _eglError(EGL_BAD_ATTRIBUTE, "eglGetPlatformDisplay");
+ return NULL;
+ }
+
+ return _eglFindDisplay(_EGL_PLATFORM_DRM, native_display);
+}
+#endif /* HAVE_DRM_PLATFORM */
+
+#ifdef HAVE_WAYLAND_PLATFORM
+_EGLDisplay*
+_eglGetWaylandDisplay(struct wl_display *native_display,
+ const EGLint *attrib_list)
+{
+ /* EGL_EXT_platform_wayland recognizes no attributes. */
+ if (attrib_list != NULL && attrib_list[0] != EGL_NONE) {
+ _eglError(EGL_BAD_ATTRIBUTE, "eglGetPlatformDisplay");
+ return NULL;
+ }
+
+ return _eglFindDisplay(_EGL_PLATFORM_WAYLAND, native_display);
}
+#endif /* HAVE_WAYLAND_PLATFORM */
projects / mesa.git / blobdiff