[Aura] Added Support for rendering software compositor frames as cc::TextureLayers.

cc/resources/texture_mailbox.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/resources/texture_mailbox.h"
 
 #include "base/logging.h"
 #include "third_party/khronos/GLES2/gl2.h"
 
 namespace cc {
 
 TextureMailbox::TextureMailbox()
-    : sync_point_(0) {
+    : sync_point_(0),
+      handle_(base::SharedMemory::NULLHandle()) {
 }
 
 TextureMailbox::TextureMailbox(
     const std::string& mailbox_name,
-    const ReleaseCallback& mailbox_callback)
-    : callback_(mailbox_callback),
+    const ReleaseCallback& callback)
+    : callback_(callback),
       target_(GL_TEXTURE_2D),
-      sync_point_(0) {
-  DCHECK(mailbox_name.empty() == mailbox_callback.is_null());
+      sync_point_(0),
+      handle_(base::SharedMemory::NULLHandle()) {
+  DCHECK(mailbox_name.empty() == callback.is_null());
   if (!mailbox_name.empty()) {
     CHECK(mailbox_name.size() == sizeof(name_.name));
     name_.SetName(reinterpret_cast<const int8*>(mailbox_name.data()));
   }
 }
 
 TextureMailbox::TextureMailbox(
     const gpu::Mailbox& mailbox_name,
-    const ReleaseCallback& mailbox_callback)
-    : callback_(mailbox_callback),
+    const ReleaseCallback& callback)
+    : callback_(callback),
       target_(GL_TEXTURE_2D),
-      sync_point_(0) {
-  DCHECK(mailbox_name.IsZero() == mailbox_callback.is_null());
+      sync_point_(0),
+      handle_(base::SharedMemory::NULLHandle()) {
+  DCHECK(mailbox_name.IsZero() == callback.is_null());
   name_.SetName(mailbox_name.name);
 }
 
 TextureMailbox::TextureMailbox(
     const gpu::Mailbox& mailbox_name,
-    const ReleaseCallback& mailbox_callback,
+    const ReleaseCallback& callback,
     unsigned sync_point)
-    : callback_(mailbox_callback),
+    : callback_(callback),
       target_(GL_TEXTURE_2D),
-      sync_point_(sync_point) {
-  DCHECK(mailbox_name.IsZero() == mailbox_callback.is_null());
+      sync_point_(sync_point),
+      handle_(base::SharedMemory::NULLHandle()) {
+  DCHECK(mailbox_name.IsZero() == callback.is_null());
   name_.SetName(mailbox_name.name);
 }
 
 TextureMailbox::TextureMailbox(
     const gpu::Mailbox& mailbox_name,
-    const ReleaseCallback& mailbox_callback,
+    const ReleaseCallback& callback,
     unsigned texture_target,
     unsigned sync_point)
-    : callback_(mailbox_callback),
+    : callback_(callback),
       target_(texture_target),
-      sync_point_(sync_point) {
-  DCHECK(mailbox_name.IsZero() == mailbox_callback.is_null());
+      sync_point_(sync_point),
+      handle_(base::SharedMemory::NULLHandle()) {
+  DCHECK(mailbox_name.IsZero() == callback.is_null());
   name_.SetName(mailbox_name.name);
 }
 
+TextureMailbox::TextureMailbox(
+    base::SharedMemoryHandle handle,
+    gfx::Size size,
+    const ReleaseCallback& callback)
+    : callback_(callback),
+      target_(GL_TEXTURE_2D),
+      sync_point_(0),
+      handle_(handle),
+      size_(size) {
+}
+
 TextureMailbox::~TextureMailbox() {
 }
 
 bool TextureMailbox::Equals(const gpu::Mailbox& other) const {
-  return !memcmp(data(), other.name, sizeof(name_.name));
+  return IsTexture() && !memcmp(data(), other.name, sizeof(name_.name));
+}
+
+bool TextureMailbox::Equals(base::SharedMemoryHandle handle) const {
+  return IsSharedMemory() && handle_ == handle;
 }
 
 bool TextureMailbox::Equals(const TextureMailbox& other) const {
-  return Equals(other.name());
-}
-
-bool TextureMailbox::IsEmpty() const {
-  return name_.IsZero();
+  return Equals(other.name()) || Equals(other.handle());

[danakj, 2013/05/23 15:34:33]

check that IsTexture() and IsSharedMemory() also match?

[slavi, 2013/05/28 18:55:13]

Done.

 }
 
 void TextureMailbox::RunReleaseCallback(unsigned sync_point,
                                         bool lost_resource) const {
   if (!callback_.is_null())
     callback_.Run(sync_point, lost_resource);
 }
 
 void TextureMailbox::SetName(const gpu::Mailbox& other) {
   name_.SetName(other.name);
+  handle_ = base::SharedMemory::NULLHandle();
+}
+
+void TextureMailbox::SetHandle(base::SharedMemoryHandle handle,
+                               gfx::Size size) {
+  name_.SetZero();
+  handle_ = handle;
+  size_ = size;
 }
 
 }  // namespace cc