Add m-esr52 at 52.6.0

1 files changed, 191 insertions, 0 deletions

diff --git a/gfx/gl/SharedSurfaceEGL.cpp b/gfx/gl/SharedSurfaceEGL.cpp
new file mode 100644
index 000000000..5538138e4
--- /dev/null
+++ b/gfx/gl/SharedSurfaceEGL.cpp
@@ -0,0 +1,191 @@
+/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
+/* 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 "SharedSurfaceEGL.h"
+
+#include "GLBlitHelper.h"
+#include "GLContextEGL.h"
+#include "GLLibraryEGL.h"
+#include "GLReadTexImageHelper.h"
+#include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
+#include "SharedSurface.h"
+#include "TextureGarbageBin.h"
+
+namespace mozilla {
+namespace gl {
+
+/*static*/ UniquePtr<SharedSurface_EGLImage>
+SharedSurface_EGLImage::Create(GLContext* prodGL,
+                               const GLFormats& formats,
+                               const gfx::IntSize& size,
+                               bool hasAlpha,
+                               EGLContext context)
+{
+    GLLibraryEGL* egl = &sEGLLibrary;
+    MOZ_ASSERT(egl);
+    MOZ_ASSERT(context);
+
+    UniquePtr<SharedSurface_EGLImage> ret;
+
+    if (!HasExtensions(egl, prodGL)) {
+        return Move(ret);
+    }
+
+    MOZ_ALWAYS_TRUE(prodGL->MakeCurrent());
+    GLuint prodTex = CreateTextureForOffscreen(prodGL, formats, size);
+    if (!prodTex) {
+        return Move(ret);
+    }
+
+    EGLClientBuffer buffer = reinterpret_cast<EGLClientBuffer>(uintptr_t(prodTex));
+    EGLImage image = egl->fCreateImage(egl->Display(), context,
+                                       LOCAL_EGL_GL_TEXTURE_2D, buffer,
+                                       nullptr);
+    if (!image) {
+        prodGL->fDeleteTextures(1, &prodTex);
+        return Move(ret);
+    }
+
+    ret.reset( new SharedSurface_EGLImage(prodGL, egl, size, hasAlpha,
+                                          formats, prodTex, image) );
+    return Move(ret);
+}
+
+bool
+SharedSurface_EGLImage::HasExtensions(GLLibraryEGL* egl, GLContext* gl)
+{
+    return egl->HasKHRImageBase() &&
+           egl->IsExtensionSupported(GLLibraryEGL::KHR_gl_texture_2D_image) &&
+           (gl->IsExtensionSupported(GLContext::OES_EGL_image_external) ||
+            gl->IsExtensionSupported(GLContext::OES_EGL_image));
+}
+
+SharedSurface_EGLImage::SharedSurface_EGLImage(GLContext* gl,
+                                               GLLibraryEGL* egl,
+                                               const gfx::IntSize& size,
+                                               bool hasAlpha,
+                                               const GLFormats& formats,
+                                               GLuint prodTex,
+                                               EGLImage image)
+    : SharedSurface(SharedSurfaceType::EGLImageShare,
+                    AttachmentType::GLTexture,
+                    gl,
+                    size,
+                    hasAlpha,
+                    false) // Can't recycle, as mSync changes never update TextureHost.
+    , mMutex("SharedSurface_EGLImage mutex")
+    , mEGL(egl)
+    , mFormats(formats)
+    , mProdTex(prodTex)
+    , mImage(image)
+    , mSync(0)
+{}
+
+SharedSurface_EGLImage::~SharedSurface_EGLImage()
+{
+    mEGL->fDestroyImage(Display(), mImage);
+
+    if (mSync) {
+        // We can't call this unless we have the ext, but we will always have
+        // the ext if we have something to destroy.
+        mEGL->fDestroySync(Display(), mSync);
+        mSync = 0;
+    }
+
+    if (!mGL || !mGL->MakeCurrent())
+        return;
+
+    mGL->fDeleteTextures(1, &mProdTex);
+    mProdTex = 0;
+}
+
+layers::TextureFlags
+SharedSurface_EGLImage::GetTextureFlags() const
+{
+    return layers::TextureFlags::DEALLOCATE_CLIENT;
+}
+
+void
+SharedSurface_EGLImage::ProducerReleaseImpl()
+{
+    MutexAutoLock lock(mMutex);
+    mGL->MakeCurrent();
+
+    if (mEGL->IsExtensionSupported(GLLibraryEGL::KHR_fence_sync) &&
+        mGL->IsExtensionSupported(GLContext::OES_EGL_sync))
+    {
+        if (mSync) {
+            MOZ_RELEASE_ASSERT(false, "GFX: Non-recycleable should not Fence twice.");
+            MOZ_ALWAYS_TRUE( mEGL->fDestroySync(Display(), mSync) );
+            mSync = 0;
+        }
+
+        mSync = mEGL->fCreateSync(Display(),
+                                  LOCAL_EGL_SYNC_FENCE,
+                                  nullptr);
+        if (mSync) {
+            mGL->fFlush();
+            return;
+        }
+    }
+
+    MOZ_ASSERT(!mSync);
+    mGL->fFinish();
+}
+
+void
+SharedSurface_EGLImage::ProducerReadAcquireImpl()
+{
+    // Wait on the fence, because presumably we're going to want to read this surface
+    if (mSync) {
+        mEGL->fClientWaitSync(Display(), mSync, 0, LOCAL_EGL_FOREVER);
+    }
+}
+
+EGLDisplay
+SharedSurface_EGLImage::Display() const
+{
+    return mEGL->Display();
+}
+
+bool
+SharedSurface_EGLImage::ToSurfaceDescriptor(layers::SurfaceDescriptor* const out_descriptor)
+{
+    *out_descriptor = layers::EGLImageDescriptor((uintptr_t)mImage, (uintptr_t)mSync,
+                                                 mSize, mHasAlpha);
+    return true;
+}
+
+bool
+SharedSurface_EGLImage::ReadbackBySharedHandle(gfx::DataSourceSurface* out_surface)
+{
+    MOZ_ASSERT(out_surface);
+    MOZ_ASSERT(NS_IsMainThread());
+    return sEGLLibrary.ReadbackEGLImage(mImage, out_surface);
+}
+
+////////////////////////////////////////////////////////////////////////
+
+/*static*/ UniquePtr<SurfaceFactory_EGLImage>
+SurfaceFactory_EGLImage::Create(GLContext* prodGL, const SurfaceCaps& caps,
+                                const RefPtr<layers::LayersIPCChannel>& allocator,
+                                const layers::TextureFlags& flags)
+{
+    EGLContext context = GLContextEGL::Cast(prodGL)->mContext;
+
+    typedef SurfaceFactory_EGLImage ptrT;
+    UniquePtr<ptrT> ret;
+
+    GLLibraryEGL* egl = &sEGLLibrary;
+    if (SharedSurface_EGLImage::HasExtensions(egl, prodGL)) {
+        ret.reset( new ptrT(prodGL, caps, allocator, flags, context) );
+    }
+
+    return Move(ret);
+}
+
+} // namespace gl
+
+} /* namespace mozilla */