chromecast/ozone/cast_egl_platform.h

   1 // Copyright 2015 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 CHROMECAST_OZONE_CAST_EGL_PLATFORM_H_
   6 #define CHROMECAST_OZONE_CAST_EGL_PLATFORM_H_
   7
   8 #include "ui/ozone/public/surface_factory_ozone.h"
   9
  10 namespace gfx {
  11 class Size;
  12 }
  13
  14 namespace chromecast {
  15 namespace ozone {
  16
  17 // Interface representing all the hardware-specific elements of an Ozone
  18 // implementation for Cast.  Supply an implementation of this interface
  19 // to OzonePlatformCast to create a complete Ozone implementation.
  20 class CastEglPlatform {
  21  public:
  22   typedef ui::SurfaceFactoryOzone::AddGLLibraryCallback AddGLLibraryCallback;
  23   typedef ui::SurfaceFactoryOzone::SetGLGetProcAddressProcCallback
  24       SetGLGetProcAddressProcCallback;
  25
  26   virtual ~CastEglPlatform() {}
  27
  28   // Default display size is used for initial display and also as a minimum
  29   // resolution for applications.
  30   virtual gfx::Size GetDefaultDisplaySize() const = 0;
  31
  32   // Returns an array of EGL properties, which can be used in any EGL function
  33   // used to select a display configuration. Note that all properties should be
  34   // immediately followed by the corresponding desired value and array should be
  35   // terminated with EGL_NONE. Ownership of the array is not transferred to
  36   // caller. desired_list contains list of desired EGL properties and values.
  37   virtual const int32* GetEGLSurfaceProperties(const int32* desired_list) = 0;
  38
  39   // Initialize/ShutdownHardware are called at most once each over the object's
  40   // lifetime.  Initialize will be called before creating display type or
  41   // window.  If Initialize fails, return false (Shutdown will still be called).
  42   virtual bool InitializeHardware() = 0;
  43   virtual void ShutdownHardware() = 0;
  44
  45   // Called once after hardware successfully initialized.  Implementation needs
  46   // to add the EGL and GLES2 libraries through add_gl_library and also supply
  47   // a pointer to eglGetProcAddress (or equivalent function).
  48   virtual bool LoadEGLGLES2Bindings(
  49       AddGLLibraryCallback add_gl_library,
  50       SetGLGetProcAddressProcCallback set_gl_get_proc_address) = 0;
  51
  52   // Create/destroy an EGLNativeDisplayType.  These may be called multiple times
  53   // over the object's lifetime, for example to release the display when
  54   // switching to an external application.  There will be at most one display
  55   // type at a time.
  56   virtual intptr_t CreateDisplayType(const gfx::Size& size) = 0;
  57   virtual void DestroyDisplayType(intptr_t display_type) = 0;
  58
  59   // Create/destroy an EGLNativeWindow.  There will be at most one window at a
  60   // time, created within a valid display type.
  61   virtual intptr_t CreateWindow(intptr_t display_type,
  62                                 const gfx::Size& size) = 0;
  63   virtual void DestroyWindow(intptr_t window) = 0;
  64 };
  65
  66 }  // namespace ozone
  67 }  // namespace chromecast
  68
  69 #endif  // CHROMECAST_OZONE_CAST_EGL_PLATFORM_H_