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/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=2:
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "DMABufLibWrapper.h"
#ifdef MOZ_WAYLAND
# include "nsWaylandDisplay.h"
#endif
#include "base/message_loop.h" // for MessageLoop
#include "mozilla/StaticPrefs_widget.h"
#include "mozilla/StaticPrefs_media.h"
#include "mozilla/gfx/gfxVars.h"
#include "WidgetUtilsGtk.h"
#include "gfxConfig.h"
#include "nsIGfxInfo.h"
#include "mozilla/Components.h"
#include "mozilla/ClearOnShutdown.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <mutex>
#include <unistd.h>
#include "gbm.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace widget {
bool sUseWebGLDmabufBackend = true;
#define GBMLIB_NAME "libgbm.so.1"
#define DRMLIB_NAME "libdrm.so.2"
// Use static lock to protect dri operation as
// gbm_dri.c is not thread safe.
mozilla::StaticMutex GbmLib::sDRILock MOZ_UNANNOTATED;
bool GbmLib::sLoaded = false;
void* GbmLib::sGbmLibHandle = nullptr;
void* GbmLib::sXf86DrmLibHandle = nullptr;
CreateDeviceFunc GbmLib::sCreateDevice;
DestroyDeviceFunc GbmLib::sDestroyDevice;
CreateFunc GbmLib::sCreate;
CreateWithModifiersFunc GbmLib::sCreateWithModifiers;
GetModifierFunc GbmLib::sGetModifier;
GetStrideFunc GbmLib::sGetStride;
GetFdFunc GbmLib::sGetFd;
DestroyFunc GbmLib::sDestroy;
MapFunc GbmLib::sMap;
UnmapFunc GbmLib::sUnmap;
GetPlaneCountFunc GbmLib::sGetPlaneCount;
GetHandleForPlaneFunc GbmLib::sGetHandleForPlane;
GetStrideForPlaneFunc GbmLib::sGetStrideForPlane;
GetOffsetFunc GbmLib::sGetOffset;
DeviceIsFormatSupportedFunc GbmLib::sDeviceIsFormatSupported;
DrmPrimeHandleToFDFunc GbmLib::sDrmPrimeHandleToFD;
CreateSurfaceFunc GbmLib::sCreateSurface;
DestroySurfaceFunc GbmLib::sDestroySurface;
bool GbmLib::IsLoaded() {
return sCreateDevice != nullptr && sDestroyDevice != nullptr &&
sCreate != nullptr && sCreateWithModifiers != nullptr &&
sGetModifier != nullptr && sGetStride != nullptr &&
sGetFd != nullptr && sDestroy != nullptr && sMap != nullptr &&
sUnmap != nullptr && sGetPlaneCount != nullptr &&
sGetHandleForPlane != nullptr && sGetStrideForPlane != nullptr &&
sGetOffset != nullptr && sDeviceIsFormatSupported != nullptr &&
sDrmPrimeHandleToFD != nullptr && sCreateSurface != nullptr &&
sDestroySurface != nullptr;
}
bool GbmLib::Load() {
static bool sTriedToLoad = false;
if (sTriedToLoad) {
return sLoaded;
}
sTriedToLoad = true;
MOZ_ASSERT(!sGbmLibHandle);
MOZ_ASSERT(!sLoaded);
LOGDMABUF(("Loading DMABuf system library %s ...\n", GBMLIB_NAME));
sGbmLibHandle = dlopen(GBMLIB_NAME, RTLD_LAZY | RTLD_LOCAL);
if (!sGbmLibHandle) {
LOGDMABUF(("Failed to load %s, dmabuf isn't available.\n", GBMLIB_NAME));
return false;
}
sCreateDevice = (CreateDeviceFunc)dlsym(sGbmLibHandle, "gbm_create_device");
sDestroyDevice =
(DestroyDeviceFunc)dlsym(sGbmLibHandle, "gbm_device_destroy");
sCreate = (CreateFunc)dlsym(sGbmLibHandle, "gbm_bo_create");
sCreateWithModifiers = (CreateWithModifiersFunc)dlsym(
sGbmLibHandle, "gbm_bo_create_with_modifiers");
sGetModifier = (GetModifierFunc)dlsym(sGbmLibHandle, "gbm_bo_get_modifier");
sGetStride = (GetStrideFunc)dlsym(sGbmLibHandle, "gbm_bo_get_stride");
sGetFd = (GetFdFunc)dlsym(sGbmLibHandle, "gbm_bo_get_fd");
sDestroy = (DestroyFunc)dlsym(sGbmLibHandle, "gbm_bo_destroy");
sMap = (MapFunc)dlsym(sGbmLibHandle, "gbm_bo_map");
sUnmap = (UnmapFunc)dlsym(sGbmLibHandle, "gbm_bo_unmap");
sGetPlaneCount =
(GetPlaneCountFunc)dlsym(sGbmLibHandle, "gbm_bo_get_plane_count");
sGetHandleForPlane = (GetHandleForPlaneFunc)dlsym(
sGbmLibHandle, "gbm_bo_get_handle_for_plane");
sGetStrideForPlane = (GetStrideForPlaneFunc)dlsym(
sGbmLibHandle, "gbm_bo_get_stride_for_plane");
sGetOffset = (GetOffsetFunc)dlsym(sGbmLibHandle, "gbm_bo_get_offset");
sDeviceIsFormatSupported = (DeviceIsFormatSupportedFunc)dlsym(
sGbmLibHandle, "gbm_device_is_format_supported");
sCreateSurface =
(CreateSurfaceFunc)dlsym(sGbmLibHandle, "gbm_surface_create");
sDestroySurface =
(DestroySurfaceFunc)dlsym(sGbmLibHandle, "gbm_surface_destroy");
sXf86DrmLibHandle = dlopen(DRMLIB_NAME, RTLD_LAZY | RTLD_LOCAL);
if (!sXf86DrmLibHandle) {
LOGDMABUF(("Failed to load %s, dmabuf isn't available.\n", DRMLIB_NAME));
return false;
}
sDrmPrimeHandleToFD =
(DrmPrimeHandleToFDFunc)dlsym(sXf86DrmLibHandle, "drmPrimeHandleToFD");
sLoaded = IsLoaded();
if (!sLoaded) {
LOGDMABUF(("Failed to load all symbols from %s\n", GBMLIB_NAME));
}
return sLoaded;
}
int DMABufDevice::GetDmabufFD(uint32_t aGEMHandle) {
int fd;
return GbmLib::DrmPrimeHandleToFD(mDRMFd, aGEMHandle, 0, &fd) < 0 ? -1 : fd;
}
gbm_device* DMABufDevice::GetGbmDevice() {
std::call_once(mFlagGbmDevice, [&] {
mGbmDevice = (mDRMFd != -1) ? GbmLib::CreateDevice(mDRMFd) : nullptr;
});
return mGbmDevice;
}
int DMABufDevice::OpenDRMFd() { return open(mDrmRenderNode.get(), O_RDWR); }
bool DMABufDevice::IsEnabled(nsACString& aFailureId) {
if (mDRMFd == -1) {
aFailureId = mFailureId;
}
return mDRMFd != -1;
}
DMABufDevice::DMABufDevice()
: mXRGBFormat({true, false, GBM_FORMAT_XRGB8888, {}}),
mARGBFormat({true, true, GBM_FORMAT_ARGB8888, {}}) {
Configure();
}
DMABufDevice::~DMABufDevice() {
if (mGbmDevice) {
GbmLib::DestroyDevice(mGbmDevice);
mGbmDevice = nullptr;
}
if (mDRMFd != -1) {
close(mDRMFd);
mDRMFd = -1;
}
}
void DMABufDevice::Configure() {
LOGDMABUF(("DMABufDevice::Configure()"));
if (!GbmLib::IsAvailable()) {
LOGDMABUF(("GbmLib is not available!"));
mFailureId = "FEATURE_FAILURE_NO_LIBGBM";
return;
}
mDrmRenderNode = nsAutoCString(getenv("MOZ_DRM_DEVICE"));
if (mDrmRenderNode.IsEmpty()) {
mDrmRenderNode.Assign(gfx::gfxVars::DrmRenderDevice());
}
if (mDrmRenderNode.IsEmpty()) {
LOGDMABUF(("We're missing DRM render device!\n"));
mFailureId = "FEATURE_FAILURE_NO_DRM_DEVICE";
return;
}
LOGDMABUF(("Using DRM device %s", mDrmRenderNode.get()));
mDRMFd = open(mDrmRenderNode.get(), O_RDWR);
if (mDRMFd < 0) {
LOGDMABUF(("Failed to open drm render node %s error %s\n",
mDrmRenderNode.get(), strerror(errno)));
mFailureId = "FEATURE_FAILURE_NO_DRM_DEVICE";
return;
}
#ifdef MOZ_WAYLAND
LoadFormatModifiers();
#endif
LOGDMABUF(("DMABuf is enabled"));
}
#ifdef NIGHTLY_BUILD
bool DMABufDevice::IsDMABufTexturesEnabled() {
return gfx::gfxVars::UseDMABuf() &&
StaticPrefs::widget_dmabuf_textures_enabled();
}
#else
bool DMABufDevice::IsDMABufTexturesEnabled() { return false; }
#endif
bool DMABufDevice::IsDMABufWebGLEnabled() {
LOGDMABUF(
("DMABufDevice::IsDMABufWebGLEnabled: UseDMABuf %d "
"sUseWebGLDmabufBackend %d "
"widget_dmabuf_webgl_enabled %d\n",
gfx::gfxVars::UseDMABuf(), sUseWebGLDmabufBackend,
StaticPrefs::widget_dmabuf_webgl_enabled()));
return gfx::gfxVars::UseDMABuf() && sUseWebGLDmabufBackend &&
StaticPrefs::widget_dmabuf_webgl_enabled();
}
#ifdef MOZ_WAYLAND
void DMABufDevice::SetModifiersToGfxVars() {
gfxVars::SetDMABufModifiersXRGB(mXRGBFormat.mModifiers);
gfxVars::SetDMABufModifiersARGB(mARGBFormat.mModifiers);
}
void DMABufDevice::GetModifiersFromGfxVars() {
mXRGBFormat.mModifiers = gfxVars::DMABufModifiersXRGB().Clone();
mARGBFormat.mModifiers = gfxVars::DMABufModifiersARGB().Clone();
}
#endif
void DMABufDevice::DisableDMABufWebGL() { sUseWebGLDmabufBackend = false; }
GbmFormat* DMABufDevice::GetGbmFormat(bool aHasAlpha) {
GbmFormat* format = aHasAlpha ? &mARGBFormat : &mXRGBFormat;
return format->mIsSupported ? format : nullptr;
}
#ifdef MOZ_WAYLAND
void DMABufDevice::AddFormatModifier(bool aHasAlpha, int aFormat,
uint32_t mModifierHi,
uint32_t mModifierLo) {
GbmFormat* format = aHasAlpha ? &mARGBFormat : &mXRGBFormat;
format->mIsSupported = true;
format->mHasAlpha = aHasAlpha;
format->mFormat = aFormat;
format->mModifiers.AppendElement(((uint64_t)mModifierHi << 32) | mModifierLo);
}
static void dmabuf_modifiers(void* data,
struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf,
uint32_t format, uint32_t modifier_hi,
uint32_t modifier_lo) {
// skip modifiers marked as invalid
if (modifier_hi == (DRM_FORMAT_MOD_INVALID >> 32) &&
modifier_lo == (DRM_FORMAT_MOD_INVALID & 0xffffffff)) {
return;
}
auto* device = static_cast<DMABufDevice*>(data);
switch (format) {
case GBM_FORMAT_ARGB8888:
device->AddFormatModifier(true, format, modifier_hi, modifier_lo);
break;
case GBM_FORMAT_XRGB8888:
device->AddFormatModifier(false, format, modifier_hi, modifier_lo);
break;
default:
break;
}
}
static void dmabuf_format(void* data,
struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf,
uint32_t format) {
// XXX: deprecated
}
static const struct zwp_linux_dmabuf_v1_listener dmabuf_listener = {
dmabuf_format, dmabuf_modifiers};
static void global_registry_handler(void* data, wl_registry* registry,
uint32_t id, const char* interface,
uint32_t version) {
if (strcmp(interface, "zwp_linux_dmabuf_v1") == 0 && version > 2) {
auto* dmabuf = WaylandRegistryBind<zwp_linux_dmabuf_v1>(
registry, id, &zwp_linux_dmabuf_v1_interface, 3);
LOGDMABUF(("zwp_linux_dmabuf_v1 is available."));
zwp_linux_dmabuf_v1_add_listener(dmabuf, &dmabuf_listener, data);
} else if (strcmp(interface, "wl_drm") == 0) {
LOGDMABUF(("wl_drm is available."));
}
}
static void global_registry_remover(void* data, wl_registry* registry,
uint32_t id) {}
static const struct wl_registry_listener registry_listener = {
global_registry_handler, global_registry_remover};
void DMABufDevice::LoadFormatModifiers() {
if (!GdkIsWaylandDisplay()) {
return;
}
if (XRE_IsParentProcess()) {
MOZ_ASSERT(NS_IsMainThread());
wl_display* display = WaylandDisplayGetWLDisplay();
wl_registry* registry = wl_display_get_registry(display);
wl_registry_add_listener(registry, ®istry_listener, this);
wl_display_roundtrip(display);
wl_display_roundtrip(display);
wl_registry_destroy(registry);
SetModifiersToGfxVars();
} else {
GetModifiersFromGfxVars();
}
}
#endif
DMABufDevice* GetDMABufDevice() {
static StaticAutoPtr<DMABufDevice> sDmaBufDevice;
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
sDmaBufDevice = new DMABufDevice();
if (NS_IsMainThread()) {
ClearOnShutdown(&sDmaBufDevice);
} else {
NS_DispatchToMainThread(NS_NewRunnableFunction(
"ClearDmaBufDevice", [] { ClearOnShutdown(&sDmaBufDevice); }));
}
});
return sDmaBufDevice.get();
}
} // namespace widget
} // namespace mozilla