ui/gl/gl_image_egl.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gl/gl_image_egl.h"
   6
   7 #include "ui/gl/gl_bindings.h"
   8
   9 namespace gfx {
  10
  11 GLImageEGL::GLImageEGL(gfx::Size size)
  12     : egl_image_(EGL_NO_IMAGE_KHR),
  13       size_(size) {
  14 }
  15
  16 GLImageEGL::~GLImageEGL() {
  17   Destroy();
  18 }
  19
  20 bool GLImageEGL::Initialize(gfx::GpuMemoryBufferHandle buffer) {
  21   EGLClientBuffer cbuf = static_cast<EGLClientBuffer>(buffer);
  22   EGLint attrs[] = {
  23     EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
  24     EGL_NONE,
  25   };
  26   egl_image_ = eglCreateImageKHR(
  27       eglGetDisplay(EGL_DEFAULT_DISPLAY),
  28       EGL_NO_CONTEXT,
  29       EGL_NATIVE_BUFFER_ANDROID,
  30       cbuf,
  31       attrs);
  32
  33   if (egl_image_ == EGL_NO_IMAGE_KHR) {
  34     EGLint error = eglGetError();
  35     LOG(ERROR) << "Error creating EGLImage: " << error;
  36     return false;
  37   }
  38
  39   return true;
  40 }
  41
  42 bool GLImageEGL::BindTexImage() {
  43   if (egl_image_ == EGL_NO_IMAGE_KHR) {
  44     LOG(ERROR) << "NULL EGLImage in BindTexImage";
  45     return false;
  46   }
  47
  48   glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, egl_image_);
  49
  50   if (glGetError() != GL_NO_ERROR) {
  51     return false;
  52   }
  53
  54   return true;
  55 }
  56
  57 gfx::Size GLImageEGL::GetSize() {
  58   return size_;
  59 }
  60
  61 void GLImageEGL::Destroy() {
  62   if (egl_image_ == EGL_NO_IMAGE_KHR)
  63     return;
  64
  65   EGLBoolean success = eglDestroyImageKHR(
  66       eglGetDisplay(EGL_DEFAULT_DISPLAY), egl_image_);
  67
  68   if (success == EGL_FALSE) {
  69     EGLint error = eglGetError();
  70     LOG(ERROR) << "Error destroying EGLImage: " << error;
  71   }
  72
  73   egl_image_ = EGL_NO_IMAGE_KHR;
  74 }
  75
  76 void GLImageEGL::ReleaseTexImage() {
  77   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, 0, GL_RGBA, GL_UNSIGNED_BYTE,
  78       NULL);
  79 }
  80
  81 }  // namespace gfx