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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.
#ifndef UI_GL_GL_IMAGE_EGL_H_
#define UI_GL_GL_IMAGE_EGL_H_
#include <EGL/eglplatform.h>
#include "base/macros.h"
#include "base/threading/thread_checker.h"
#include "ui/gl/gl_export.h"
#include "ui/gl/gl_image.h"
namespace gl {
// Abstract base class for EGL-based images.
class GL_EXPORT GLImageEGL : public GLImage {
public:
explicit GLImageEGL(const gfx::Size& size);
// Overridden from GLImage:
gfx::Size GetSize() override;
bool BindTexImage(unsigned target) override;
void ReleaseTexImage(unsigned target) override {}
protected:
~GLImageEGL() override;
// Same semantic as specified for eglCreateImageKHR. There two main usages:
// 1- When using the |target| EGL_GL_TEXTURE_2D_KHR it is required to pass
// a valid |context|. This allows to create an EGLImage from a GL texture.
// Then this EGLImage can be converted to an external resource to be shared
// with other client APIs.
// 2- When using the |target| EGL_NATIVE_PIXMAP_KHR or EGL_LINUX_DMA_BUF_EXT
// it is required to pass EGL_NO_CONTEXT. This allows to create an EGLImage
// from an external resource. Then this EGLImage can be converted to a GL
// texture.
bool Initialize(void* context /* EGLContext */,
unsigned target /* EGLenum */,
void* buffer /* EGLClientBuffer */,
const EGLint* attrs);
void* egl_image_ /* EGLImageKHR */;
const gfx::Size size_;
base::ThreadChecker thread_checker_;
private:
DISALLOW_COPY_AND_ASSIGN(GLImageEGL);
};
} // namespace gl
#endif // UI_GL_GL_IMAGE_EGL_H_
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