ui/gl/io_surface_support_mac.h

   1 // Copyright (c) 2012 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 #ifndef UI_GL_IO_SURFACE_SUPPORT_MAC_H_
   6 #define UI_GL_IO_SURFACE_SUPPORT_MAC_H_
   7
   8 #include <CoreFoundation/CoreFoundation.h>
   9 #include <CoreVideo/CoreVideo.h>
  10 #include <mach/mach.h>
  11 #include <OpenGL/OpenGL.h>
  12
  13 #include "base/basictypes.h"
  14 #include "ui/gl/gl_export.h"
  15
  16 // This Mac OS X-specific class provides dynamically-linked access to
  17 // IOSurface.framework, which is only available on 10.6 and later.
  18 // Since Chromium is built on 10.5 we must dynamically look up all of
  19 // the entry points we need in this framework.
  20
  21 // See IOSurface/IOSurfaceAPI.h and OpenGL/CGLIOSurface.h on 10.6 for
  22 // documentation of the fields and methods of this class.
  23
  24 class GL_EXPORT IOSurfaceSupport {
  25  public:
  26   // Returns an instance of the IOSurfaceSupport class if the
  27   // operating system supports it, NULL otherwise. It is safe to call
  28   // this multiple times.
  29   static IOSurfaceSupport* Initialize();
  30
  31   virtual CFStringRef GetKIOSurfaceWidth() = 0;
  32   virtual CFStringRef GetKIOSurfaceHeight() = 0;
  33   virtual CFStringRef GetKIOSurfaceBytesPerElement() = 0;
  34   virtual CFStringRef GetKIOSurfaceIsGlobal() = 0;
  35
  36   virtual CFTypeRef IOSurfaceCreate(CFDictionaryRef properties) = 0;
  37
  38   // The following two APIs assume the IOSurface was created with the
  39   // kIOSurfaceIsGlobal key set to true
  40   virtual uint32 IOSurfaceGetID(CFTypeRef io_surface) = 0;
  41   virtual CFTypeRef IOSurfaceLookup(uint32 io_surface_id) = 0;
  42
  43   // The following two APIs are more robust and secure, but
  44   // unfortunately it looks like it will be a lot of work to correctly
  45   // transmit a mach port from process to process (possibly requiring
  46   // a side channel for or extension of the Chrome IPC mechanism)
  47   virtual mach_port_t IOSurfaceCreateMachPort(CFTypeRef io_surface) = 0;
  48   virtual CFTypeRef IOSurfaceLookupFromMachPort(mach_port_t port) = 0;
  49
  50   virtual size_t IOSurfaceGetWidth(CFTypeRef io_surface) = 0;
  51   virtual size_t IOSurfaceGetHeight(CFTypeRef io_surface) = 0;
  52
  53   virtual CGLError CGLTexImageIOSurface2D(CGLContextObj ctx,
  54                                           GLenum target,
  55                                           GLenum internal_format,
  56                                           GLsizei width,
  57                                           GLsizei height,
  58                                           GLenum format,
  59                                           GLenum type,
  60                                           CFTypeRef io_surface,
  61                                           GLuint plane) = 0;
  62
  63   virtual CFTypeRef CVPixelBufferGetIOSurface(
  64       CVPixelBufferRef pixel_buffer) = 0;
  65
  66  protected:
  67   IOSurfaceSupport();
  68   virtual ~IOSurfaceSupport();
  69
  70   DISALLOW_COPY_AND_ASSIGN(IOSurfaceSupport);
  71 };
  72
  73 #endif  // UI_GL_IO_SURFACE_SUPPORT_MAC_H_