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// 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/gl_bindings.h"
#include "ui/gl/gl_surface_egl.h"
namespace gfx {
GLImageEGL::GLImageEGL(gfx::Size size)
: egl_image_(EGL_NO_IMAGE_KHR),
size_(size),
release_after_use_(false),
in_use_(false),
target_(0) {
}
GLImageEGL::~GLImageEGL() {
Destroy();
}
bool GLImageEGL::Initialize(gfx::GpuMemoryBufferHandle buffer) {
DCHECK(buffer.native_buffer);
EGLint attrs[] = {
EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
EGL_NONE,
};
egl_image_ = eglCreateImageKHR(
GLSurfaceEGL::GetHardwareDisplay(),
EGL_NO_CONTEXT,
EGL_NATIVE_BUFFER_ANDROID,
buffer.native_buffer,
attrs);
if (egl_image_ == EGL_NO_IMAGE_KHR) {
EGLint error = eglGetError();
LOG(ERROR) << "Error creating EGLImage: " << error;
return false;
}
return true;
}
void GLImageEGL::Destroy() {
if (egl_image_ == EGL_NO_IMAGE_KHR)
return;
EGLBoolean success = eglDestroyImageKHR(
GLSurfaceEGL::GetHardwareDisplay(), egl_image_);
if (success == EGL_FALSE) {
EGLint error = eglGetError();
LOG(ERROR) << "Error destroying EGLImage: " << error;
}
egl_image_ = EGL_NO_IMAGE_KHR;
}
gfx::Size GLImageEGL::GetSize() {
return size_;
}
bool GLImageEGL::BindTexImage(unsigned target) {
if (egl_image_ == EGL_NO_IMAGE_KHR) {
LOG(ERROR) << "NULL EGLImage in BindTexImage";
return false;
}
if (target == GL_TEXTURE_RECTANGLE_ARB) {
LOG(ERROR) << "EGLImage cannot be bound to TEXTURE_RECTANGLE_ARB target";
return false;
}
if (target_ && target_ != target) {
LOG(ERROR) << "EGLImage can only be bound to one target";
return false;
}
target_ = target;
// Defer ImageTargetTexture2D if not currently in use.
if (!in_use_)
return true;
glEGLImageTargetTexture2DOES(target_, egl_image_);
DCHECK_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
return true;
}
void GLImageEGL::ReleaseTexImage(unsigned target) {
// Nothing to do here as image is released after each use or there is no need
// to release image.
}
void GLImageEGL::WillUseTexImage() {
DCHECK(egl_image_);
DCHECK(!in_use_);
in_use_ = true;
glEGLImageTargetTexture2DOES(target_, egl_image_);
DCHECK_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
}
void GLImageEGL::DidUseTexImage() {
DCHECK(in_use_);
in_use_ = false;
if (!release_after_use_)
return;
char zero[4] = { 0, };
glTexImage2D(target_,
0,
GL_RGBA,
1,
1,
0,
GL_RGBA,
GL_UNSIGNED_BYTE,
&zero);
}
void GLImageEGL::SetReleaseAfterUse() {
release_after_use_ = true;
}
} // namespace gfx
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