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[Renderer] Convert CV stuff to callback

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Use callback instead of handler because the latter is apparently broken?
Fix a few issues I found by trying to build a simple app with it.
This commit is contained in:
Eryn Wells 2015-11-14 23:17:15 -08:00
parent 7f27ca7bc6
commit 2abf63e6fc
1 changed files with 33 additions and 14 deletions
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47
Renderer/OpenGLView.swift
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@ -18,6 +18,15 @@ public class OpenGLView: NSOpenGLView {
// TODO: Should this be weak?
public var renderer: FrameRenderer? = nil
deinit {
stopRenderingLoop()
}
override public func awakeFromNib() {
setupOpenGL()
startRenderingLoop()
}
override public func viewWillMoveToSuperview(newSuperview: NSView?) {
if newSuperview != nil {
setupOpenGL()
@ -28,7 +37,7 @@ public class OpenGLView: NSOpenGLView {
}
private func setupOpenGL() {
guard didSetupOpenGL else { return }
guard !didSetupOpenGL else { return }
defer { didSetupOpenGL = true }
let attrs = [NSOpenGLPFAAccelerated,
@ -65,18 +74,8 @@ public class OpenGLView: NSOpenGLView {
return
}
success = CVDisplayLinkSetOutputHandler(displayLink!) {
(displayLink: CVDisplayLink,
currentTime: UnsafePointer<CVTimeStamp>,
displayTime: UnsafePointer<CVTimeStamp>,
optionsIn: CVOptionFlags,
optionsOut: UnsafeMutablePointer<CVOptionFlags>) -> CVReturn in
var result = kCVReturnSuccess
autoreleasepool {
result = self.renderAtTime(currentTime.memory)
}
return result
}
let unsafeSelf = UnsafeMutablePointer<Void>(unsafeAddressOf(self))
success = CVDisplayLinkSetOutputCallback(displayLink!, displayLinkCallback, unsafeSelf)
guard success == kCVReturnSuccess else {
// TODO: Throw an error?
return
@ -89,7 +88,11 @@ public class OpenGLView: NSOpenGLView {
return
}
CVDisplayLinkStart(displayLink!)
success = CVDisplayLinkStart(displayLink!)
guard success == kCVReturnSuccess else {
// TODO: Throw an error?
return
}
}
private func stopRenderingLoop() {
@ -122,4 +125,20 @@ public class OpenGLView: NSOpenGLView {
return kCVReturnSuccess
}
}
private func displayLinkCallback(
displayLink: CVDisplayLink,
currentTime: UnsafePointer<CVTimeStamp>,
outputTime: UnsafePointer<CVTimeStamp>,
flags: CVOptionFlags,
flagsOut: UnsafeMutablePointer<CVOptionFlags>,
context: UnsafeMutablePointer<Void>) -> CVReturn
{
var result = kCVReturnSuccess
autoreleasepool {
let glView = unsafeBitCast(context, OpenGLView.self)
result = glView.renderAtTime(currentTime.memory)
}
return result
}