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/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 4; -*- */
/* 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 "SharedSurfaceDMABUF.h"
#include "gfxPlatform.h"
#include "GLContextEGL.h"
#include "MozFramebuffer.h"
#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor, etc
#include "mozilla/gfx/gfxVars.h"
namespace mozilla::gl {
static bool HasDmaBufExtensions(const GLContextEGL* gl) {
const auto& egl = *(gl->mEgl);
return egl.IsExtensionSupported(EGLExtension::EXT_image_dma_buf_import) &&
egl.IsExtensionSupported(
EGLExtension::EXT_image_dma_buf_import_modifiers) &&
egl.IsExtensionSupported(EGLExtension::MESA_image_dma_buf_export);
}
/*static*/
UniquePtr<SharedSurface_DMABUF> SharedSurface_DMABUF::Create(
const SharedSurfaceDesc& desc) {
const auto& gle = GLContextEGL::Cast(desc.gl);
const auto& context = gle->mContext;
const auto& egl = *(gle->mEgl);
RefPtr<DMABufSurface> surface;
UniquePtr<MozFramebuffer> fb;
if (!HasDmaBufExtensions(gle) || !gfx::gfxVars::UseDMABufSurfaceExport()) {
// Using MESA_image_dma_buf_export is not supported or it's broken.
// Create dmabuf surface directly via GBM and create
// EGLImage/framebuffer over it.
const auto flags = static_cast<DMABufSurfaceFlags>(
DMABUF_TEXTURE | DMABUF_USE_MODIFIERS | DMABUF_ALPHA);
surface = DMABufSurfaceRGBA::CreateDMABufSurface(desc.size.width,
desc.size.height, flags);
if (!surface || !surface->CreateTexture(desc.gl)) {
return nullptr;
}
const auto tex = surface->GetTexture();
fb = MozFramebuffer::CreateForBacking(desc.gl, desc.size, 0, false,
LOCAL_GL_TEXTURE_2D, tex);
if (!fb) return nullptr;
} else {
// Use MESA_image_dma_buf_export to create EGLImage/framebuffer directly
// and derive dmabuf from it.
fb = MozFramebuffer::Create(desc.gl, desc.size, 0, false);
if (!fb) return nullptr;
const auto buffer = reinterpret_cast<EGLClientBuffer>(fb->ColorTex());
const auto image =
egl.fCreateImage(context, LOCAL_EGL_GL_TEXTURE_2D, buffer, nullptr);
if (!image) return nullptr;
surface = DMABufSurfaceRGBA::CreateDMABufSurface(
desc.gl, image, desc.size.width, desc.size.height);
if (!surface) return nullptr;
}
return AsUnique(new SharedSurface_DMABUF(desc, std::move(fb), surface));
}
SharedSurface_DMABUF::SharedSurface_DMABUF(const SharedSurfaceDesc& desc,
UniquePtr<MozFramebuffer> fb,
const RefPtr<DMABufSurface> surface)
: SharedSurface(desc, std::move(fb)), mSurface(surface) {}
SharedSurface_DMABUF::~SharedSurface_DMABUF() {
const auto& gl = mDesc.gl;
if (!gl || !gl->MakeCurrent()) {
return;
}
mSurface->ReleaseTextures();
}
void SharedSurface_DMABUF::ProducerReleaseImpl() { mSurface->FenceSet(); }
void SharedSurface_DMABUF::WaitForBufferOwnership() { mSurface->FenceWait(); }
Maybe<layers::SurfaceDescriptor> SharedSurface_DMABUF::ToSurfaceDescriptor() {
layers::SurfaceDescriptor desc;
if (!mSurface->Serialize(desc)) return {};
return Some(desc);
}
/*static*/
UniquePtr<SurfaceFactory_DMABUF> SurfaceFactory_DMABUF::Create(GLContext& gl) {
if (!widget::DMABufDevice::IsDMABufWebGLEnabled()) {
return nullptr;
}
auto dmabufFactory = MakeUnique<SurfaceFactory_DMABUF>(gl);
if (dmabufFactory->CanCreateSurface(gl)) {
return dmabufFactory;
}
LOGDMABUF(
("SurfaceFactory_DMABUF::Create() failed, fallback to SW buffers.\n"));
widget::DMABufDevice::DisableDMABufWebGL();
return nullptr;
}
bool SurfaceFactory_DMABUF::CanCreateSurface(GLContext& gl) {
UniquePtr<SharedSurface> test =
CreateShared(gfx::IntSize(1, 1), gfx::ColorSpace2::SRGB);
if (!test) {
LOGDMABUF((
"SurfaceFactory_DMABUF::CanCreateSurface() failed to create surface."));
return false;
}
auto desc = test->ToSurfaceDescriptor();
if (!desc) {
LOGDMABUF(
("SurfaceFactory_DMABUF::CanCreateSurface() failed to serialize "
"surface."));
return false;
}
RefPtr<DMABufSurface> importedSurface =
DMABufSurface::CreateDMABufSurface(*desc);
if (!importedSurface) {
LOGDMABUF((
"SurfaceFactory_DMABUF::CanCreateSurface() failed to import surface."));
return false;
}
if (!importedSurface->CreateTexture(&gl)) {
LOGDMABUF(
("SurfaceFactory_DMABUF::CanCreateSurface() failed to create texture "
"over surface."));
return false;
}
return true;
}
SurfaceFactory_DMABUF::SurfaceFactory_DMABUF(GLContext& gl)
: SurfaceFactory({&gl, SharedSurfaceType::EGLSurfaceDMABUF,
layers::TextureType::DMABUF, true}) {}
} // namespace mozilla::gl
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