From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 gfx/gl/SharedSurfaceGL.cpp | 190 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 190 insertions(+)
 create mode 100644 gfx/gl/SharedSurfaceGL.cpp

(limited to 'gfx/gl/SharedSurfaceGL.cpp')

diff --git a/gfx/gl/SharedSurfaceGL.cpp b/gfx/gl/SharedSurfaceGL.cpp
new file mode 100644
index 000000000..6fba1b4eb
--- /dev/null
+++ b/gfx/gl/SharedSurfaceGL.cpp
@@ -0,0 +1,190 @@
+/* -*- 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 "SharedSurfaceGL.h"
+
+#include "GLBlitHelper.h"
+#include "GLContext.h"
+#include "GLReadTexImageHelper.h"
+#include "mozilla/gfx/2D.h"
+#include "ScopedGLHelpers.h"
+
+namespace mozilla {
+namespace gl {
+
+using gfx::IntSize;
+using gfx::SurfaceFormat;
+
+/*static*/ UniquePtr<SharedSurface_Basic>
+SharedSurface_Basic::Create(GLContext* gl,
+                            const GLFormats& formats,
+                            const IntSize& size,
+                            bool hasAlpha)
+{
+    UniquePtr<SharedSurface_Basic> ret;
+    gl->MakeCurrent();
+
+    GLContext::LocalErrorScope localError(*gl);
+    GLuint tex = CreateTextureForOffscreen(gl, formats, size);
+
+    GLenum err = localError.GetError();
+    MOZ_ASSERT_IF(err != LOCAL_GL_NO_ERROR, err == LOCAL_GL_OUT_OF_MEMORY);
+    if (err) {
+        gl->fDeleteTextures(1, &tex);
+        return Move(ret);
+    }
+
+    bool ownsTex = true;
+    ret.reset( new SharedSurface_Basic(gl, size, hasAlpha, tex, ownsTex) );
+    return Move(ret);
+}
+
+
+/*static*/ UniquePtr<SharedSurface_Basic>
+SharedSurface_Basic::Wrap(GLContext* gl,
+                          const IntSize& size,
+                          bool hasAlpha,
+                          GLuint tex)
+{
+    bool ownsTex = false;
+    UniquePtr<SharedSurface_Basic> ret( new SharedSurface_Basic(gl, size, hasAlpha, tex,
+                                                                ownsTex) );
+    return Move(ret);
+}
+
+SharedSurface_Basic::SharedSurface_Basic(GLContext* gl,
+                                         const IntSize& size,
+                                         bool hasAlpha,
+                                         GLuint tex,
+                                         bool ownsTex)
+    : SharedSurface(SharedSurfaceType::Basic,
+                    AttachmentType::GLTexture,
+                    gl,
+                    size,
+                    hasAlpha,
+                    true)
+    , mTex(tex)
+    , mOwnsTex(ownsTex)
+    , mFB(0)
+{
+    mGL->MakeCurrent();
+    mGL->fGenFramebuffers(1, &mFB);
+
+    ScopedBindFramebuffer autoFB(mGL, mFB);
+    mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
+                              LOCAL_GL_COLOR_ATTACHMENT0,
+                              LOCAL_GL_TEXTURE_2D,
+                              mTex,
+                              0);
+
+    DebugOnly<GLenum> status = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
+    MOZ_ASSERT(status == LOCAL_GL_FRAMEBUFFER_COMPLETE);
+}
+
+SharedSurface_Basic::~SharedSurface_Basic()
+{
+    if (!mGL || !mGL->MakeCurrent())
+        return;
+
+    if (mFB)
+        mGL->fDeleteFramebuffers(1, &mFB);
+
+    if (mOwnsTex)
+        mGL->fDeleteTextures(1, &mTex);
+}
+
+
+////////////////////////////////////////////////////////////////////////
+
+SurfaceFactory_Basic::SurfaceFactory_Basic(GLContext* gl, const SurfaceCaps& caps,
+                                           const layers::TextureFlags& flags)
+    : SurfaceFactory(SharedSurfaceType::Basic, gl, caps, nullptr, flags)
+{ }
+
+
+////////////////////////////////////////////////////////////////////////
+// SharedSurface_GLTexture
+
+/*static*/ UniquePtr<SharedSurface_GLTexture>
+SharedSurface_GLTexture::Create(GLContext* prodGL,
+                                const GLFormats& formats,
+                                const IntSize& size,
+                                bool hasAlpha)
+{
+    MOZ_ASSERT(prodGL);
+
+    prodGL->MakeCurrent();
+
+    UniquePtr<SharedSurface_GLTexture> ret;
+    GLContext::LocalErrorScope localError(*prodGL);
+
+    GLuint tex = CreateTextureForOffscreen(prodGL, formats, size);
+
+    GLenum err = localError.GetError();
+    MOZ_ASSERT_IF(err, err == LOCAL_GL_OUT_OF_MEMORY);
+    if (err) {
+        prodGL->fDeleteTextures(1, &tex);
+        return Move(ret);
+    }
+
+    ret.reset(new SharedSurface_GLTexture(prodGL, size,
+                                          hasAlpha, tex));
+    return Move(ret);
+}
+
+SharedSurface_GLTexture::~SharedSurface_GLTexture()
+{
+    if (!mGL->MakeCurrent())
+        return;
+
+    if (mTex) {
+        mGL->fDeleteTextures(1, &mTex);
+    }
+
+    if (mSync) {
+        mGL->fDeleteSync(mSync);
+    }
+}
+
+void
+SharedSurface_GLTexture::ProducerReleaseImpl()
+{
+    mGL->MakeCurrent();
+
+    if (mGL->IsSupported(GLFeature::sync)) {
+        if (mSync) {
+            mGL->fDeleteSync(mSync);
+            mSync = 0;
+        }
+
+        mSync = mGL->fFenceSync(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
+        if (mSync) {
+            mGL->fFlush();
+            return;
+        }
+    }
+    MOZ_ASSERT(!mSync);
+
+    mGL->fFinish();
+}
+
+bool
+SharedSurface_GLTexture::ToSurfaceDescriptor(layers::SurfaceDescriptor* const out_descriptor)
+{
+    *out_descriptor = layers::SurfaceDescriptorSharedGLTexture(ProdTexture(),
+                                                               ProdTextureTarget(),
+                                                               (uintptr_t)mSync,
+                                                               mSize,
+                                                               mHasAlpha);
+
+    // Transfer ownership of the fence to the host
+    mSync = nullptr;
+    return true;
+}
+
+
+} // namespace gl
+
+} /* namespace mozilla */
-- 
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