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// Copyright (c) 2010 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 APP_SURFACE_IO_SURFACE_SUPPORT_MAC_H_
#define APP_SURFACE_IO_SURFACE_SUPPORT_MAC_H_
#include <CoreFoundation/CoreFoundation.h>
#include <mach/mach.h>
#include <OpenGL/OpenGL.h>
#include "base/basictypes.h"
// This Mac OS X-specific class provides dynamically-linked access to
// IOSurface.framework, which is only available on 10.6 and later.
// Since Chromium is built on 10.5 we must dynamically look up all of
// the entry points we need in this framework.
// See IOSurface/IOSurfaceAPI.h and OpenGL/CGLIOSurface.h on 10.6 for
// documentation of the fields and methods of this class.
class IOSurfaceSupport {
public:
// Returns an instance of the IOSurfaceSupport class if the
// operating system supports it, NULL otherwise. It is safe to call
// this multiple times.
static IOSurfaceSupport* Initialize();
virtual CFStringRef GetKIOSurfaceWidth() = 0;
virtual CFStringRef GetKIOSurfaceHeight() = 0;
virtual CFStringRef GetKIOSurfaceBytesPerElement() = 0;
virtual CFStringRef GetKIOSurfaceIsGlobal() = 0;
virtual CFTypeRef IOSurfaceCreate(CFDictionaryRef properties) = 0;
// The following two APIs assume the IOSurface was created with the
// kIOSurfaceIsGlobal key set to true
virtual uint32 IOSurfaceGetID(CFTypeRef io_surface) = 0;
virtual CFTypeRef IOSurfaceLookup(uint32 io_surface_id) = 0;
// The following two APIs are more robust and secure, but
// unfortunately it looks like it will be a lot of work to correctly
// transmit a mach port from process to process (possibly requiring
// a side channel for or extension of the Chrome IPC mechanism)
virtual mach_port_t IOSurfaceCreateMachPort(CFTypeRef io_surface) = 0;
virtual CFTypeRef IOSurfaceLookupFromMachPort(mach_port_t port) = 0;
virtual CGLError CGLTexImageIOSurface2D(CGLContextObj ctx,
GLenum target,
GLenum internal_format,
GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
CFTypeRef io_surface,
GLuint plane) = 0;
protected:
IOSurfaceSupport();
virtual ~IOSurfaceSupport();
DISALLOW_COPY_AND_ASSIGN(IOSurfaceSupport);
};
#endif // APP_SURFACE_IO_SURFACE_SUPPORT_MAC_H_
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