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// Copyright 2015 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 CHROMECAST_PUBLIC_CAST_EGL_PLATFORM_H_
#define CHROMECAST_PUBLIC_CAST_EGL_PLATFORM_H_
namespace chromecast {
struct Size;
// Interface representing all the hardware-specific elements of an Ozone
// implementation for Cast. Supply an implementation of this interface
// to OzonePlatformCast to create a complete Ozone implementation.
class CastEglPlatform {
public:
typedef void* (*GLGetProcAddressProc)(const char* name);
typedef void* NativeDisplayType;
typedef void* NativeWindowType;
virtual ~CastEglPlatform() {}
// Returns an array of EGL properties, which can be used in any EGL function
// used to select a display configuration. Note that all properties should be
// immediately followed by the corresponding desired value and array should be
// terminated with EGL_NONE. Ownership of the array is not transferred to
// caller. desired_list contains list of desired EGL properties and values.
virtual const int* GetEGLSurfaceProperties(const int* desired_list) = 0;
// Initialize/ShutdownHardware are called at most once each over the object's
// lifetime. Initialize will be called before creating display type or
// window. If Initialize fails, return false (Shutdown will still be called).
virtual bool InitializeHardware() = 0;
virtual void ShutdownHardware() = 0;
// These three are called once after hardware is successfully initialized.
// The implementation must load the libraries containing EGL and GLES2
// bindings (return the pointer obtained from dlopen). It must also supply
// a function pointer to eglGetProcAddress or equivalent.
virtual void* GetEglLibrary() = 0;
virtual void* GetGles2Library() = 0;
virtual GLGetProcAddressProc GetGLProcAddressProc() = 0;
// Creates/destroys an EGLNativeDisplayType. These may be called multiple
// times over the object's lifetime, for example to release the display when
// switching to an external application. There will be at most one display
// type at a time.
virtual NativeDisplayType CreateDisplayType(const Size& size) = 0;
virtual void DestroyDisplayType(NativeDisplayType display_type) = 0;
// Creates/destroys an EGLNativeWindow. There will be at most one window at a
// time, created within a valid display type.
virtual NativeWindowType CreateWindow(NativeDisplayType display_type,
const Size& size) = 0;
virtual void DestroyWindow(NativeWindowType window) = 0;
// Specifies if creating multiple surfaces on a window is broken on this
// platform and a new window is required. This should return false on most
// implementations.
virtual bool MultipleSurfaceUnsupported() = 0;
};
} // namespace chromecast
#endif // CHROMECAST_PUBLIC_CAST_EGL_PLATFORM_H_
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