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 24class 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 GetKIOSurfacePixelFormat() = 0; 35 virtual CFStringRef GetKIOSurfaceIsGlobal() = 0; 36 37 virtual CFTypeRef IOSurfaceCreate(CFDictionaryRef properties) = 0; 38 39 // The following two APIs assume the IOSurface was created with the 40 // kIOSurfaceIsGlobal key set to true 41 virtual uint32 IOSurfaceGetID(CFTypeRef io_surface) = 0; 42 virtual CFTypeRef IOSurfaceLookup(uint32 io_surface_id) = 0; 43 44 // The following two APIs are more robust and secure, but 45 // unfortunately it looks like it will be a lot of work to correctly 46 // transmit a mach port from process to process (possibly requiring 47 // a side channel for or extension of the Chrome IPC mechanism) 48 virtual mach_port_t IOSurfaceCreateMachPort(CFTypeRef io_surface) = 0; 49 virtual CFTypeRef IOSurfaceLookupFromMachPort(mach_port_t port) = 0; 50 51 virtual size_t IOSurfaceGetWidth(CFTypeRef io_surface) = 0; 52 virtual size_t IOSurfaceGetHeight(CFTypeRef io_surface) = 0; 53 virtual size_t IOSurfaceGetBytesPerRow(CFTypeRef io_surface) = 0; 54 virtual void* IOSurfaceGetBaseAddress(CFTypeRef io_surface) = 0; 55 56 virtual IOReturn IOSurfaceLock(CFTypeRef io_surface, 57 uint32 options, 58 uint32* seed) = 0; 59 virtual IOReturn IOSurfaceUnlock(CFTypeRef io_surface, 60 uint32 options, 61 uint32* seed) = 0; 62 63 virtual CGLError CGLTexImageIOSurface2D(CGLContextObj ctx, 64 GLenum target, 65 GLenum internal_format, 66 GLsizei width, 67 GLsizei height, 68 GLenum format, 69 GLenum type, 70 CFTypeRef io_surface, 71 GLuint plane) = 0; 72 73 virtual CFTypeRef CVPixelBufferGetIOSurface( 74 CVPixelBufferRef pixel_buffer) = 0; 75 76 protected: 77 IOSurfaceSupport(); 78 virtual ~IOSurfaceSupport(); 79 80 DISALLOW_COPY_AND_ASSIGN(IOSurfaceSupport); 81}; 82 83#endif // UI_GL_IO_SURFACE_SUPPORT_MAC_H_ 84