text: // Copyright (c) 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 "ui/gl/gl_image_egl.h"
  
  #include "ui/gl/egl_util.h"
  #include "ui/gl/gl_bindings.h"
  #include "ui/gl/gl_enums.h"
  #include "ui/gl/gl_surface_egl.h"
  
  namespace gl {
  
  GLImageEGL::GLImageEGL(const gfx::Size& size)
      : egl_image_(EGL_NO_IMAGE_KHR), size_(size) {}
  
  GLImageEGL::~GLImageEGL() {
    DCHECK(thread_checker_.CalledOnValidThread());
    if (egl_image_ == EGL_NO_IMAGE_KHR)
      return;
  
    const EGLBoolean result =
        eglDestroyImageKHR(GLSurfaceEGL::GetHardwareDisplay(), egl_image_);
    if (result == EGL_FALSE)
      DLOG(ERROR) << "Error destroying EGLImage: " << ui::GetLastEGLErrorString();
  }
  
  bool GLImageEGL::Initialize(EGLContext context,
                              EGLenum target,
                              EGLClientBuffer buffer,
                              const EGLint* attrs) {
    DCHECK(thread_checker_.CalledOnValidThread());
    DCHECK_EQ(EGL_NO_IMAGE_KHR, egl_image_);
    egl_image_ = eglCreateImageKHR(GLSurfaceEGL::GetHardwareDisplay(), context,
                                   target, buffer, attrs);
    const bool success = egl_image_ != EGL_NO_IMAGE_KHR;
    if (!success)
      LOG(ERROR) << "Error creating EGLImage: " << ui::GetLastEGLErrorString();
    return success;
  }
  
  gfx::Size GLImageEGL::GetSize() {
    return size_;
  }
  
  GLImageEGL::BindOrCopy GLImageEGL::ShouldBindOrCopy() {
    return egl_image_ == EGL_NO_IMAGE_KHR ? COPY : BIND;
  }
  
  bool GLImageEGL::BindTexImage(unsigned target) {
    DCHECK(thread_checker_.CalledOnValidThread());
    DCHECK_EQ(BIND, ShouldBindOrCopy());
  
    glEGLImageTargetTexture2DOES(target, egl_image_);
    const GLenum error = glGetError();
  
    DLOG_IF(ERROR, error != GL_NO_ERROR)
        << "Error binding EGLImage: " << GLEnums::GetStringError(error);
    return error == GL_NO_ERROR;
  }
  
  }  // namespace gl
  