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/*
* Copyright 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#import <Foundation/Foundation.h>
#if TARGET_OS_IPHONE
#import <GLKit/GLKit.h>
#else
#import <AppKit/NSOpenGL.h>
#endif
NS_ASSUME_NONNULL_BEGIN
@class RTCVideoFrame;
// RTCOpenGLVideoRenderer issues appropriate OpenGL commands to draw a frame to
// the currently bound framebuffer. Supports OpenGL 3.2 and OpenGLES 2.0. OpenGL
// framebuffer creation and management should be handled elsewhere using the
// same context used to initialize this class.
@interface RTCOpenGLVideoRenderer : NSObject
// The last successfully drawn frame. Used to avoid drawing frames unnecessarily
// hence saving battery life by reducing load.
@property(nonatomic, readonly) RTCVideoFrame *lastDrawnFrame;
#if TARGET_OS_IPHONE
- (instancetype)initWithContext:(EAGLContext *)context
NS_DESIGNATED_INITIALIZER;
#else
- (instancetype)initWithContext:(NSOpenGLContext *)context
NS_DESIGNATED_INITIALIZER;
#endif
// Draws |frame| onto the currently bound OpenGL framebuffer. |setupGL| must be
// called before this function will succeed.
- (BOOL)drawFrame:(RTCVideoFrame *)frame;
// The following methods are used to manage OpenGL resources. On iOS
// applications should release resources when placed in background for use in
// the foreground application. In fact, attempting to call OpenGLES commands
// while in background will result in application termination.
// Sets up the OpenGL state needed for rendering.
- (void)setupGL;
// Tears down the OpenGL state created by |setupGL|.
- (void)teardownGL;
- (instancetype)init NS_UNAVAILABLE;
@end
NS_ASSUME_NONNULL_END
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