mirrors
/
mesa
mirror of https://gitlab.freedesktop.org/mesa/mesa
1
0
Fork 0
Code Issues 9 Packages Projects Releases Wiki Activity
mesa/src/egl/main/egldisplay.c

653 lines
17 KiB
C
Raw Blame History

/**************************************************************************
*
* 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 <assert.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <io.h>
#else
#include <unistd.h>
#endif
#include <fcntl.h>
#include "c11/threads.h"
#include "util/macros.h"
#include "util/os_file.h"
#include "util/u_atomic.h"
#include "eglcontext.h"
#include "eglcurrent.h"
#include "eglsurface.h"
#include "egldevice.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "eglglobals.h"
#include "egllog.h"
#include "eglimage.h"
#include "eglsync.h"
/* Includes for _eglNativePlatformDetectNativeDisplay */
#ifdef HAVE_WAYLAND_PLATFORM
#include <wayland-client.h>
#endif
#ifdef HAVE_DRM_PLATFORM
#include <gbm.h>
#endif
#ifdef HAVE_WINDOWS_PLATFORM
#include <windows.h>
#endif
/**
* Map build-system platform names to platform types.
*/
static const struct {
_EGLPlatformType platform;
const char *name;
} egl_platforms[] = {
{ _EGL_PLATFORM_X11, "x11" },
{ _EGL_PLATFORM_XCB, "xcb" },
{ _EGL_PLATFORM_WAYLAND, "wayland" },
{ _EGL_PLATFORM_DRM, "drm" },
{ _EGL_PLATFORM_ANDROID, "android" },
{ _EGL_PLATFORM_HAIKU, "haiku" },
{ _EGL_PLATFORM_SURFACELESS, "surfaceless" },
{ _EGL_PLATFORM_DEVICE, "device" },
{ _EGL_PLATFORM_WINDOWS, "windows" },
};
/**
* Return the native platform by parsing EGL_PLATFORM.
*/
static _EGLPlatformType
_eglGetNativePlatformFromEnv(void)
{
_EGLPlatformType plat = _EGL_INVALID_PLATFORM;
const char *plat_name;
EGLint i;
static_assert(ARRAY_SIZE(egl_platforms) == _EGL_NUM_PLATFORMS,
"Missing platform");
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;
for (i = 0; i < ARRAY_SIZE(egl_platforms); i++) {
if (strcmp(egl_platforms[i].name, plat_name) == 0) {
plat = egl_platforms[i].platform;
break;
}
}
if (plat == _EGL_INVALID_PLATFORM)
_eglLog(_EGL_WARNING, "invalid EGL_PLATFORM given");
return plat;
}
/**
* Try detecting native platform with the help of native display characteristcs.
*/
static _EGLPlatformType
_eglNativePlatformDetectNativeDisplay(void *nativeDisplay)
{
if (nativeDisplay == EGL_DEFAULT_DISPLAY)
return _EGL_INVALID_PLATFORM;
#ifdef HAVE_WINDOWS_PLATFORM
if (GetObjectType(nativeDisplay) == OBJ_DC)
return _EGL_PLATFORM_WINDOWS;
#endif
#if defined(HAVE_WAYLAND_PLATFORM) || defined(HAVE_DRM_PLATFORM)
if (_eglPointerIsDereferencable(nativeDisplay)) {
void *first_pointer = *(void **) nativeDisplay;
#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
}
#endif
return _EGL_INVALID_PLATFORM;
}
/**
* Return the native platform. It is the platform of the EGL native types.
*/
_EGLPlatformType
_eglGetNativePlatform(void *nativeDisplay)
{
_EGLPlatformType detected_platform = _eglGetNativePlatformFromEnv();
const char *detection_method = "environment";
if (detected_platform == _EGL_INVALID_PLATFORM) {
detected_platform = _eglNativePlatformDetectNativeDisplay(nativeDisplay);
detection_method = "autodetected";
}
if (detected_platform == _EGL_INVALID_PLATFORM) {
detected_platform = _EGL_NATIVE_PLATFORM;
detection_method = "build-time configuration";
}
_eglLog(_EGL_DEBUG, "Native platform type: %s (%s)",
egl_platforms[detected_platform].name, detection_method);
return detected_platform;
}
/**
* Finish display management.
*/
void
_eglFiniDisplay(void)
{
_EGLDisplay *dispList, *disp;
/* atexit function is called with global mutex locked */
dispList = _eglGlobal.DisplayList;
while (dispList) {
EGLint i;
/* pop list head */
disp = dispList;
dispList = dispList->Next;
for (i = 0; i < _EGL_NUM_RESOURCES; i++) {
if (disp->ResourceLists[i]) {
_eglLog(_EGL_DEBUG, "Display %p is destroyed with resources", disp);
break;
}
}
/* The fcntl() code in _eglGetDeviceDisplay() ensures that valid fd >= 3,
* and invalid one is 0.
*/
if (disp->Options.fd)
close(disp->Options.fd);
free(disp->Options.Attribs);
free(disp);
}
_eglGlobal.DisplayList = NULL;
}
static EGLBoolean
_eglSameAttribs(const EGLAttrib *a, const EGLAttrib *b)
{
size_t na = _eglNumAttribs(a);
size_t nb = _eglNumAttribs(b);
/* different numbers of attributes must be different */
if (na != nb)
return EGL_FALSE;
/* both lists NULL are the same */
if (!a && !b)
return EGL_TRUE;
/* otherwise, compare the lists */
return memcmp(a, b, na * sizeof(a[0])) == 0 ? EGL_TRUE : EGL_FALSE;
}
/**
* Find the display corresponding to the specified native display, or create a
* new one. EGL 1.5 says:
*
* Multiple calls made to eglGetPlatformDisplay with the same parameters
* will return the same EGLDisplay handle.
*
* We read this extremely strictly, and treat a call with NULL attribs as
* different from a call with attribs only equal to { EGL_NONE }. Similarly
* we do not sort the attribute list, so even if all attribute _values_ are
* identical, different attribute orders will be considered different
* parameters.
*/
_EGLDisplay *
_eglFindDisplay(_EGLPlatformType plat, void *plat_dpy,
const EGLAttrib *attrib_list)
{
_EGLDisplay *disp;
size_t num_attribs;
if (plat == _EGL_INVALID_PLATFORM)
return NULL;
simple_mtx_lock(_eglGlobal.Mutex);
/* search the display list first */
for (disp = _eglGlobal.DisplayList; disp; disp = disp->Next) {
if (disp->Platform == plat && disp->PlatformDisplay == plat_dpy &&
_eglSameAttribs(disp->Options.Attribs, attrib_list))
goto out;
}
/* create a new display */
assert(!disp);
disp = calloc(1, sizeof(_EGLDisplay));
if (!disp)
goto out;
simple_mtx_init(&disp->Mutex, mtx_plain);
u_rwlock_init(&disp->TerminateLock);
disp->Platform = plat;
disp->PlatformDisplay = plat_dpy;
num_attribs = _eglNumAttribs(attrib_list);
if (num_attribs) {
disp->Options.Attribs = calloc(num_attribs, sizeof(EGLAttrib));
if (!disp->Options.Attribs) {
free(disp);
disp = NULL;
goto out;
}
memcpy(disp->Options.Attribs, attrib_list,
num_attribs * sizeof(EGLAttrib));
}
/* add to the display list */
disp->Next = _eglGlobal.DisplayList;
_eglGlobal.DisplayList = disp;
out:
simple_mtx_unlock(_eglGlobal.Mutex);
return disp;
}
/**
* Destroy the contexts and surfaces that are linked to the display.
*/
void
_eglReleaseDisplayResources(_EGLDisplay *display)
{
_EGLResource *list;
const _EGLDriver *drv = display->Driver;
simple_mtx_assert_locked(&display->Mutex);
list = display->ResourceLists[_EGL_RESOURCE_CONTEXT];
while (list) {
_EGLContext *ctx = (_EGLContext *) list;
list = list->Next;
_eglUnlinkContext(ctx);
drv->DestroyContext(display, ctx);
}
assert(!display->ResourceLists[_EGL_RESOURCE_CONTEXT]);
list = display->ResourceLists[_EGL_RESOURCE_SURFACE];
while (list) {
_EGLSurface *surf = (_EGLSurface *) list;
list = list->Next;
_eglUnlinkSurface(surf);
drv->DestroySurface(display, surf);
}
assert(!display->ResourceLists[_EGL_RESOURCE_SURFACE]);
list = display->ResourceLists[_EGL_RESOURCE_IMAGE];
while (list) {
_EGLImage *image = (_EGLImage *) list;
list = list->Next;
_eglUnlinkImage(image);
drv->DestroyImageKHR(display, image);
}
assert(!display->ResourceLists[_EGL_RESOURCE_IMAGE]);
list = display->ResourceLists[_EGL_RESOURCE_SYNC];
while (list) {
_EGLSync *sync = (_EGLSync *) list;
list = list->Next;
_eglUnlinkSync(sync);
drv->DestroySyncKHR(display, sync);
}
assert(!display->ResourceLists[_EGL_RESOURCE_SYNC]);
}
/**
* Free all the data hanging of an _EGLDisplay object, but not
* the object itself.
*/
void
_eglCleanupDisplay(_EGLDisplay *disp)
{
if (disp->Configs) {
_eglDestroyArray(disp->Configs, free);
disp->Configs = NULL;
}
/* XXX incomplete */
}
/**
* Return EGL_TRUE if the given resource is valid. That is, the display does
* own the resource.
*/
EGLBoolean
_eglCheckResource(void *res, _EGLResourceType type, _EGLDisplay *disp)
{
_EGLResource *list = disp->ResourceLists[type];
simple_mtx_assert_locked(&disp->Mutex);
if (!res)
return EGL_FALSE;
while (list) {
if (res == (void *) list) {
assert(list->Display == disp);
break;
}
list = list->Next;
}
return (list != NULL);
}
/**
* 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 *disp)
{
memset(res, 0, size);
res->Display = disp;
res->RefCount = 1;
}
/**
* Increment reference count for the resource.
*/
void
_eglGetResource(_EGLResource *res)
{
assert(res && res->RefCount > 0);
p_atomic_inc(&res->RefCount);
}
/**
* Decrement reference count for the resource.
*/
EGLBoolean
_eglPutResource(_EGLResource *res)
{
assert(res && res->RefCount > 0);
return p_atomic_dec_zero(&res->RefCount);
}
/**
* Link a resource to its display.
*/
void
_eglLinkResource(_EGLResource *res, _EGLResourceType type)
{
assert(res->Display);
simple_mtx_assert_locked(&res->Display->Mutex);
res->IsLinked = EGL_TRUE;
res->Next = res->Display->ResourceLists[type];
res->Display->ResourceLists[type] = res;
_eglGetResource(res);
}
/**
* Unlink a linked resource from its display.
*/
void
_eglUnlinkResource(_EGLResource *res, _EGLResourceType type)
{
_EGLResource *prev;
simple_mtx_assert_locked(&res->Display->Mutex);
prev = res->Display->ResourceLists[type];
if (prev != res) {
while (prev) {
if (prev->Next == res)
break;
prev = prev->Next;
}
assert(prev);
prev->Next = res->Next;
}
else {
res->Display->ResourceLists[type] = res->Next;
}
res->Next = NULL;
res->IsLinked = EGL_FALSE;
_eglPutResource(res);
/* We always unlink before destroy. The driver still owns a reference */
assert(res->RefCount);
}
#ifdef HAVE_X11_PLATFORM
_EGLDisplay*
_eglGetX11Display(Display *native_display,
const EGLAttrib *attrib_list)
{
/* EGL_EXT_platform_x11 recognizes exactly one attribute,
* EGL_PLATFORM_X11_SCREEN_EXT, which is optional.
*/
if (attrib_list != NULL) {
for (int i = 0; attrib_list[i] != EGL_NONE; i += 2) {
if (attrib_list[i] != EGL_PLATFORM_X11_SCREEN_EXT) {
_eglError(EGL_BAD_ATTRIBUTE, "eglGetPlatformDisplay");
return NULL;
}
}
}
return _eglFindDisplay(_EGL_PLATFORM_X11, native_display, attrib_list);
}
#endif /* HAVE_X11_PLATFORM */
#ifdef HAVE_XCB_PLATFORM
_EGLDisplay*
_eglGetXcbDisplay(xcb_connection_t *native_display,
const EGLAttrib *attrib_list)
{
/* EGL_EXT_platform_xcb recognizes exactly one attribute,
* EGL_PLATFORM_XCB_SCREEN_EXT, which is optional.
*/
if (attrib_list != NULL) {
for (int i = 0; attrib_list[i] != EGL_NONE; i += 2) {
if (attrib_list[i] != EGL_PLATFORM_XCB_SCREEN_EXT) {
_eglError(EGL_BAD_ATTRIBUTE, "eglGetPlatformDisplay");
return NULL;
}
}
}
return _eglFindDisplay(_EGL_PLATFORM_XCB, native_display, attrib_list);
}
#endif /* HAVE_XCB_PLATFORM */
#ifdef HAVE_DRM_PLATFORM
_EGLDisplay*
_eglGetGbmDisplay(struct gbm_device *native_display,
const EGLAttrib *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, attrib_list);
}
#endif /* HAVE_DRM_PLATFORM */
#ifdef HAVE_WAYLAND_PLATFORM
_EGLDisplay*
_eglGetWaylandDisplay(struct wl_display *native_display,
const EGLAttrib *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, attrib_list);
}
#endif /* HAVE_WAYLAND_PLATFORM */
_EGLDisplay*
_eglGetSurfacelessDisplay(void *native_display,
const EGLAttrib *attrib_list)
{
/* This platform has no native display. */
if (native_display != NULL) {
_eglError(EGL_BAD_PARAMETER, "eglGetPlatformDisplay");
return NULL;
}
/* This platform recognizes no display attributes. */
if (attrib_list != NULL && attrib_list[0] != EGL_NONE) {
_eglError(EGL_BAD_ATTRIBUTE, "eglGetPlatformDisplay");
return NULL;
}
return _eglFindDisplay(_EGL_PLATFORM_SURFACELESS, native_display,
attrib_list);
}
#ifdef HAVE_ANDROID_PLATFORM
_EGLDisplay*
_eglGetAndroidDisplay(void *native_display,
const EGLAttrib *attrib_list)
{
/* This platform recognizes no display attributes. */
if (attrib_list != NULL && attrib_list[0] != EGL_NONE) {
_eglError(EGL_BAD_ATTRIBUTE, "eglGetPlatformDisplay");
return NULL;
}
return _eglFindDisplay(_EGL_PLATFORM_ANDROID, native_display,
attrib_list);
}
#endif /* HAVE_ANDROID_PLATFORM */
_EGLDisplay*
_eglGetDeviceDisplay(void *native_display,
const EGLAttrib *attrib_list)
{
_EGLDevice *dev;
_EGLDisplay *display;
int fd = -1;
dev = _eglLookupDevice(native_display);
if (!dev) {
_eglError(EGL_BAD_PARAMETER, "eglGetPlatformDisplay");
return NULL;
}
if (attrib_list) {
for (int i = 0; attrib_list[i] != EGL_NONE; i += 2) {
EGLAttrib attrib = attrib_list[i];
EGLAttrib value = attrib_list[i + 1];
/* EGL_EXT_platform_device does not recognize any attributes,
* EGL_EXT_device_drm adds the optional EGL_DRM_MASTER_FD_EXT.
*/
if (!_eglDeviceSupports(dev, _EGL_DEVICE_DRM) ||
attrib != EGL_DRM_MASTER_FD_EXT) {
_eglError(EGL_BAD_ATTRIBUTE, "eglGetPlatformDisplay");
return NULL;
}
fd = (int) value;
}
}
display = _eglFindDisplay(_EGL_PLATFORM_DEVICE, native_display, attrib_list);
if (!display) {
_eglError(EGL_BAD_ALLOC, "eglGetPlatformDisplay");
return NULL;
}
/* If the fd is explicitly provided and we did not dup() it yet, do so.
* The spec mandates that we do so, since we'll need it past the
* eglGetPlatformDispay call.
*
* The new fd is guaranteed to be 3 or greater.
*/
if (fd != -1 && display->Options.fd == 0) {
display->Options.fd = os_dupfd_cloexec(fd);
if (display->Options.fd == -1) {
/* Do not (really) need to teardown the display */
_eglError(EGL_BAD_ALLOC, "eglGetPlatformDisplay");
return NULL;
}
}
return display;
}
Reference in New Issue View Git Blame Copy Permalink