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/*
* Copyright (c) 2013 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.
*/
#if !defined(__has_feature) || !__has_feature(objc_arc)
#error "This file requires ARC support."
#endif
#include "webrtc/modules/video_render/ios/video_render_ios_view.h"
#include "webrtc/system_wrappers/interface/trace.h"
using namespace webrtc;
@implementation VideoRenderIosView {
EAGLContext* _context;
webrtc::scoped_ptr<webrtc::OpenGles20> _gles_renderer20;
int _frameBufferWidth;
int _frameBufferHeight;
unsigned int _defaultFrameBuffer;
unsigned int _colorRenderBuffer;
}
@synthesize context = context_;
+ (Class)layerClass {
return [CAEAGLLayer class];
}
- (id)initWithCoder:(NSCoder*)coder {
// init super class
self = [super initWithCoder:coder];
if (self) {
_gles_renderer20.reset(new OpenGles20());
}
return self;
}
- (id)init {
// init super class
self = [super init];
if (self) {
_gles_renderer20.reset(new OpenGles20());
}
return self;
}
- (id)initWithFrame:(CGRect)frame {
// init super class
self = [super initWithFrame:frame];
if (self) {
_gles_renderer20.reset(new OpenGles20());
}
return self;
}
- (void)dealloc {
if (_defaultFrameBuffer) {
glDeleteFramebuffers(1, &_defaultFrameBuffer);
_defaultFrameBuffer = 0;
}
if (_colorRenderBuffer) {
glDeleteRenderbuffers(1, &_colorRenderBuffer);
_colorRenderBuffer = 0;
}
[EAGLContext setCurrentContext:nil];
}
- (NSString*)description {
return [NSString stringWithFormat:
@"A WebRTC implemented subclass of UIView."
"+Class method is overwritten, along with custom methods"];
}
- (BOOL)createContext {
// create OpenGLES context from self layer class
CAEAGLLayer* eagl_layer = (CAEAGLLayer*)self.layer;
eagl_layer.opaque = YES;
eagl_layer.drawableProperties =
[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:NO],
kEAGLDrawablePropertyRetainedBacking,
kEAGLColorFormatRGBA8,
kEAGLDrawablePropertyColorFormat,
nil];
_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
if (!_context) {
return NO;
}
if (![EAGLContext setCurrentContext:_context]) {
return NO;
}
// generates and binds the OpenGLES buffers
glGenFramebuffers(1, &_defaultFrameBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, _defaultFrameBuffer);
// Create color render buffer and allocate backing store.
glGenRenderbuffers(1, &_colorRenderBuffer);
glBindRenderbuffer(GL_RENDERBUFFER, _colorRenderBuffer);
[_context renderbufferStorage:GL_RENDERBUFFER
fromDrawable:(CAEAGLLayer*)self.layer];
glGetRenderbufferParameteriv(
GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &_frameBufferWidth);
glGetRenderbufferParameteriv(
GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &_frameBufferHeight);
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
_colorRenderBuffer);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
return NO;
}
// set the frame buffer
glBindFramebuffer(GL_FRAMEBUFFER, _defaultFrameBuffer);
glViewport(0, 0, self.frame.size.width, self.frame.size.height);
return _gles_renderer20->Setup([self bounds].size.width,
[self bounds].size.height);
}
- (BOOL)presentFramebuffer {
if (![_context presentRenderbuffer:GL_RENDERBUFFER]) {
WEBRTC_TRACE(kTraceWarning,
kTraceVideoRenderer,
0,
"%s:%d [context present_renderbuffer] "
"returned false",
__FUNCTION__,
__LINE__);
}
return YES;
}
- (BOOL)renderFrame:(I420VideoFrame*)frameToRender {
if (![EAGLContext setCurrentContext:_context]) {
return NO;
}
return _gles_renderer20->Render(*frameToRender);
}
- (BOOL)setCoordinatesForZOrder:(const float)zOrder
Left:(const float)left
Top:(const float)top
Right:(const float)right
Bottom:(const float)bottom {
return _gles_renderer20->SetCoordinates(zOrder, left, top, right, bottom);
}
@end
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