Bug 238593 depends on 55 bugs:

•    238593: [GTK][WPE] GPUProcess support [NEW; assigned to webkit-unassigned]
  •    237649: [Meta][Linux] Adoption of DMABuf as a reference buffer sharing mechanism [NEW; assigned to webkit-unassigned]
    •    236635: [GTK][WPE] Implement dmabuf path for GStreamer texture sharing with WebGL/ANGLE [NEW; assigned to chris.lord]
      •    236587: [GTK][WPE] Crashing/weird behaviour when trying to use videos as textures with ANGLE WebGL enabled [RESOLVED FIXED; assigned to chris.lord]
    •    237759: [Linux] Implement runtime loader for DMABuf, other buffer mechanisms [NEW; assigned to webkit-unassigned]
    •    235946: [GTK][WPE] Use dmabuf when possible to transfer ANGLE rendering to the compositor [RESOLVED FIXED; assigned to chris.lord]
      •    236076: Add specialize type traits to GLContext [RESOLVED FIXED; assigned to chris.lord]
    •    236436: [GTK][WPE] Improve device detection in the GbmDevice [RESOLVED FIXED; assigned to alex]
    •    236520: [GTK] [WPE] Fix problem when the buffer object is released before we try to send it to the compositor [RESOLVED FIXED; assigned to alex]
    •    236607: [GTK][WPE] Use drm render nodes in GbmDevice and make the fd global to the process [RESOLVED FIXED; assigned to alex]
    •    236637: [GTK][WPE] Some GStreamer tests crash with ANGLE enabled [RESOLVED FIXED; assigned to webkit-unassigned]
      •    236587: [GTK][WPE] Crashing/weird behaviour when trying to use videos as textures with ANGLE WebGL enabled [RESOLVED FIXED; assigned to chris.lord] (*)
    •    236836: [TextureMapper] Refactor TextureMapperPlatformLayerProxy into specializable implementations [RESOLVED FIXED; assigned to zan]
    •    236883: [GStreamer] Add WebKitDMABufVideoSink [RESOLVED FIXED; assigned to zan]
    •    237199: [GTK][WPE] Uncouple libgbm, libdrm dependencies from ANGLE functionality [RESOLVED FIXED; assigned to zan]
    •    237328: [GTK][WPE] Provide DMABuf-based composition layers, DMABufVideoSink integration [RESOLVED FIXED; assigned to zan]
    •    237606: REGRESSION(r290506): [GTK] GBM dependency breaks build [RESOLVED FIXED; assigned to webkit-unassigned]
    •    237758: [Linux] GBMDevice as a thread-specific object is problematic [RESOLVED FIXED; assigned to zan]
    •    237883: [GTK][WPE] Use GBMBufferSwapchain in GraphicsContextGLTextureMapperANGLE [RESOLVED FIXED; assigned to zan]
      •    238322: [TextureMapper] Implement GraphicsContextGLTextureMapperANGLE::prepareForDisplay() [RESOLVED FIXED; assigned to zan]
    •    237974: [GTK][WPE] Guard libgbm and libdrm code, make them conditional dependencies for GTK [RESOLVED FIXED; assigned to zan]
    •    238017: [GTK][WPE] Also enable USE_TEXTURE_MAPPER_DMABUF alongside other DMABuf-related defines [RESOLVED FIXED; assigned to zan]
    •    238110: [WPE][GStreamer] media playback broken [RESOLVED FIXED; assigned to zan]
    •    238141: [TextureMapper] Split GraphicsContextGLTextureMapper into two classes [RESOLVED FIXED; assigned to zan]
    •    238199: [WPE][GTK] VideoFrameGStreamer missing include after -r291610 refactor [RESOLVED FIXED; assigned to alex]
    •    238200: Move TextureMapper member variables, types and code out of GraphicsContextGLANGLE [RESOLVED FIXED; assigned to zan]
    •    238539: Slim down ANGLEHeaders.h [RESOLVED FIXED; assigned to zan]
    •    239037: [GTK][WPE] Move DMABuf-backed GraphicsContextGLANGLE functionality into a standalone derivation chain [RESOLVED FIXED; assigned to zan]
    •    239038: [GTK][WPE] Provide WK2 IPC encoding, decoding methods for the DMABufObject type [RESOLVED FIXED; assigned to zan]
      •    238740: [WK2] Enable more efficient encoding of synchronous-message reply arguments [RESOLVED FIXED; assigned to zdobersek]
    •    240276: [GTK][WPE] Respect and use the DMABuf modifier values [RESOLVED FIXED; assigned to zan]
    •    240313: [GTK][WPE] Make ANGLE backend EGL context initialization work [RESOLVED FIXED; assigned to alex]
    •    240314: [GTK][WPE] Remove leftover for WINDOWS support in GraphicsContextGLGBM [RESOLVED FIXED; assigned to alex]
    •    240392: [GTK][WPE] Current-context enforcement in ANGLE is expensive [RESOLVED FIXED; assigned to zan]
    •    240633: [Linux] TextureMapperPlatformLayerProxyDMABuf should support different colorspaces [RESOLVED FIXED; assigned to zdobersek]
      •    240952: [TextureMapper] Generalize YUV-to-RGB matrices [RESOLVED FIXED; assigned to zdobersek]
    •    240636: [GStreamer] DMABufVideoSink should also support YUY2, YVYU, UYVY, VYUY, AYUV formats [RESOLVED WONTFIX; assigned to webkit-unassigned]
    •    240637: [Linux] GBMBufferSwapchain should only conditionally create linear-formatted buffer objects [RESOLVED FIXED; assigned to zdobersek]
    •    241119: [GStreamer] DMABufVideoSink fails to list NV21 as a supported format [RESOLVED FIXED; assigned to zdobersek]
    •    241326: [Linux] Fix and improve format handling in DMABufFormat, TextureMapperPlatformLayerProxyDMABuf [RESOLVED FIXED; assigned to zdobersek]
    •    241462: [GBM] Overzealous attaching of GL texture as color attachment to the default framebuffer [RESOLVED FIXED; assigned to zdobersek]
    •    241850: REGRESSION(250984@main): [Linux] DrmFourCCFormatToGLInternalFormat() change breaks framebuffer blitting [RESOLVED FIXED; assigned to webkit-unassigned]
      •    242055: Update ANGLE to 2022-06-28 (2a5193f6ceca4c8a7f27b324ad7da4aa60f968b3) [RESOLVED FIXED; assigned to webkit-unassigned]
    •    242108: [GTK][WPE] Add a fallback mode for the DMABuf architecture [RESOLVED FIXED; assigned to alex]
    •    242938: [DMABuf] More thoroughly check for DMABuf capabilities [RESOLVED FIXED; assigned to zdobersek]
    •    252988: [GTK] Use DMABuf and WebKit IPC for rendering instead of wpe/x11 [RESOLVED FIXED; assigned to dpino]
    •    253085: REGRESSION(260881@main): [GStreamer] DMABuf sink caused several unexpected crashes on the WPE Release bot [RESOLVED DUPLICATE; assigned to philn]
      •    253244: [GStreamer] Establish locking when mapping gbm_bo objects for software-decoded data upload [RESOLVED FIXED; assigned to zdobersek]
      •    253245: [GStreamer] Improve GBM swapchain buffer handling [RESOLVED FIXED; assigned to zdobersek]
    •    253244: [GStreamer] Establish locking when mapping gbm_bo objects for software-decoded data upload [RESOLVED FIXED; assigned to zdobersek] (*)
    •    253245: [GStreamer] Improve GBM swapchain buffer handling [RESOLVED FIXED; assigned to zdobersek] (*)
  •    240006: [GTK][WPE] Expensive atomic operations, overabundant semaphore signaling in GPUProcess streaming IPC [NEW; assigned to webkit-unassigned]
    •    239895: IPC stream send is slow due to semaphore signal if receiver is faster than sender [RESOLVED FIXED; assigned to kkinnunen]
  •    238595: [GTK][WPE] Make ENABLE(GPU_PROCESS) code buildable [RESOLVED FIXED; assigned to zan]
  •    238596: [Linux] Implement IPC::Semaphore [RESOLVED FIXED; assigned to zan]
  •    238597: [GTK][WPE][GPUProcess] Switch GPUProcessGStreamer.cpp, GPUProcessMainGStreamer.cpp to the GLib flavor [RESOLVED FIXED; assigned to zan]
  •    238726: [Unix] Add UnixFileDescriptor, use it in IPC::Semaphore [RESOLVED FIXED; assigned to zan]
  •    239348: [GTK][WPE][GPUProcess] Add RemoteGraphicsContextGLGBM, RemoteGraphicsContextGLProxyGBM [RESOLVED FIXED; assigned to zan]
  •    239496: [GPUProcess][Unix] RemoteRenderingBackendProxy::DidCreateWakeUpSemaphoreForDisplayListStream is never sent [RESOLVED DUPLICATE; assigned to zan]

Bug 238593 does not block any bugs.