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-rw-r--r--widget/gtk/DMABufLibWrapper.cpp325
1 files changed, 325 insertions, 0 deletions
diff --git a/widget/gtk/DMABufLibWrapper.cpp b/widget/gtk/DMABufLibWrapper.cpp
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+++ b/widget/gtk/DMABufLibWrapper.cpp
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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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "base/message_loop.h" // for MessageLoop
+#include "nsWaylandDisplay.h"
+#include "DMABufLibWrapper.h"
+#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 <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dlfcn.h>
+#include <mutex>
+
+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.
+// https://gitlab.freedesktop.org/mesa/mesa/-/issues/4422
+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;
+ }
+
+ LoadFormatModifiers();
+
+ 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();
+}
+
+void DMABufDevice::SetModifiersToGfxVars() {
+ gfxVars::SetDMABufModifiersXRGB(mXRGBFormat.mModifiers);
+ gfxVars::SetDMABufModifiersARGB(mARGBFormat.mModifiers);
+}
+
+void DMABufDevice::GetModifiersFromGfxVars() {
+ mXRGBFormat.mModifiers = gfxVars::DMABufModifiersXRGB().Clone();
+ mARGBFormat.mModifiers = gfxVars::DMABufModifiersARGB().Clone();
+}
+
+void DMABufDevice::DisableDMABufWebGL() { sUseWebGLDmabufBackend = false; }
+
+GbmFormat* DMABufDevice::GetGbmFormat(bool aHasAlpha) {
+ GbmFormat* format = aHasAlpha ? &mARGBFormat : &mXRGBFormat;
+ return format->mIsSupported ? format : nullptr;
+}
+
+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, &registry_listener, this);
+ wl_display_roundtrip(display);
+ wl_display_roundtrip(display);
+ wl_registry_destroy(registry);
+ SetModifiersToGfxVars();
+ } else {
+ GetModifiersFromGfxVars();
+ }
+}
+
+DMABufDevice* GetDMABufDevice() {
+ static DMABufDevice dmaBufDevice;
+ return &dmaBufDevice;
+}
+
+} // namespace widget
+} // namespace mozilla
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 13:54:40 +0000