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// Copyright 2016 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_OZONE_PUBLIC_GL_OZONE_H_
#define UI_OZONE_PUBLIC_GL_OZONE_H_
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gpu_preference.h"
#include "ui/ozone/ozone_base_export.h"
namespace gl {
class GLContext;
class GLShareGroup;
class GLSurface;
}
namespace ui {
// Interface that has all of the required methods for an Ozone platform to
// implement a GL implementation. Functions in gl_factory.h and gl_initializer.h
// will delegate to functions in this interface.
class OZONE_BASE_EXPORT GLOzone {
public:
virtual ~GLOzone() {}
// Initializes static GL bindings and sets GL implementation.
virtual bool InitializeStaticGLBindings(
gl::GLImplementation implementation) = 0;
// Performs any one off initialization for GL implementation.
virtual bool InitializeGLOneOffPlatform() = 0;
// Initializes static debug GL bindings.
virtual void InitializeDebugGLBindings() = 0;
// Clears static GL bindings.
virtual void ClearGLBindings() = 0;
// Returns information about the GL window system binding implementation (eg.
// EGL, GLX, WGL). Returns true if the information was retrieved successfully.
virtual bool GetGLWindowSystemBindingInfo(
gl::GLWindowSystemBindingInfo* info) = 0;
// Creates a GL context that is compatible with the given surface.
// |share_group|, if not null, is a group of contexts which the internally
// created OpenGL context shares textures and other resources.
virtual scoped_refptr<gl::GLContext> CreateGLContext(
gl::GLShareGroup* share_group,
gl::GLSurface* compatible_surface,
gl::GpuPreference gpu_preference) = 0;
// Creates a GL surface that renders directly to a view.
virtual scoped_refptr<gl::GLSurface> CreateViewGLSurface(
gfx::AcceleratedWidget window) = 0;
// Creates a GL surface that renders directly into a window with surfaceless
// semantics. The surface is not backed by any buffers and is used for
// overlay-only displays. This will return null if surfaceless mode is
// unsupported.
virtual scoped_refptr<gl::GLSurface> CreateSurfacelessViewGLSurface(
gfx::AcceleratedWidget window) = 0;
// Creates a GL surface used for offscreen rendering.
virtual scoped_refptr<gl::GLSurface> CreateOffscreenGLSurface(
const gfx::Size& size) = 0;
};
} // namespace ui
#endif // UI_OZONE_PUBLIC_GL_OZONE_H_