zero copy - NOT FOR REVIEW

ui/gl/gl_image_foobar.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 "base/debug/trace_event.h"
+
+#include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_image_foobar.h"
+
+namespace gfx {
+
+GLImageFoobar::GLImageFoobar(gfx::Size size) : size_(size), prime_fd(-1) {
+}
+
+GLImageFoobar::~GLImageFoobar() {
+  Destroy();
+}
+
+bool GLImageFoobar::Initialize(gfx::GpuMemoryBufferHandle buffer) {
+  prime_fd = dup(buffer.handle.fd);
+  return prime_fd >= 0;
+}
+
+void GLImageFoobar::Destroy() {
+  if (prime_fd >= 0)
+    close(prime_fd);
+}
+
+gfx::Size GLImageFoobar::GetSize() {
+  return size_;
+}
+
+#define MAGIC(x) ( (void*) ((((uintptr_t)x) << 48) + 0xf00ba4f00ba4) )
+
+bool GLImageFoobar::BindTexImage(unsigned target) {
+  TRACE_EVENT0("zcopy", "BindTexImage");
+  glTexImage2D(
+      target,
+      0, // mip level
+      GL_BGRA_EXT,
+      size_.width(),
+      size_.height(),
+      0, // border
+      GL_BGRA_EXT,
+      GL_UNSIGNED_BYTE,
+      MAGIC(prime_fd)
+  );
+  return true;
+}
+
+void GLImageFoobar::ReleaseTexImage(unsigned target) {
+}
+
+void GLImageFoobar::WillUseTexImage() {
+}
+
+void GLImageFoobar::DidUseTexImage() {
+}
+
+}  // namespace gfx