cocoa-cb: add logging for CGL pixel format attributes

depending on the capabilities of the system and testing of various
attributes the resulting CGL pixel format can change. due to that
probing it can be helpful to know which pixel format is used to create
the CGL context. added some verbose logging that outputs final pixel
format.

1 files changed, 19 insertions, 0 deletions

diff --git a/video/out/cocoa-cb/video_layer.swift b/video/out/cocoa-cb/video_layer.swift
index 0e14e45dc3..ccc84f8fa8 100644
--- a/video/out/cocoa-cb/video_layer.swift
+++ b/video/out/cocoa-cb/video_layer.swift
@@ -148,6 +148,18 @@ class VideoLayer: CAOpenGLLayer {
     override func copyCGLPixelFormat(forDisplayMask mask: UInt32) -> CGLPixelFormatObj {
         if cglPixelFormat != nil { return cglPixelFormat! }
 
+        let attributeLookUp: [UInt32:String] = [
+            kCGLOGLPVersion_3_2_Core.rawValue:     "kCGLOGLPVersion_3_2_Core",
+            kCGLOGLPVersion_Legacy.rawValue:       "kCGLOGLPVersion_Legacy",
+            kCGLPFAOpenGLProfile.rawValue:         "kCGLPFAOpenGLProfile",
+            kCGLPFAAccelerated.rawValue:           "kCGLPFAAccelerated",
+            kCGLPFADoubleBuffer.rawValue:          "kCGLPFADoubleBuffer",
+            kCGLPFABackingStore.rawValue:          "kCGLPFABackingStore",
+            kCGLPFAAllowOfflineRenderers.rawValue: "kCGLPFAAllowOfflineRenderers",
+            kCGLPFASupportsAutomaticGraphicsSwitching.rawValue: "kCGLPFASupportsAutomaticGraphicsSwitching",
+            0: ""
+        ]
+
         let glVersions: [CGLOpenGLProfile] = [
             kCGLOGLPVersion_3_2_Core,
             kCGLOGLPVersion_Legacy
@@ -175,6 +187,13 @@ class VideoLayer: CAOpenGLLayer {
                 if err == kCGLBadAttribute || err == kCGLBadPixelFormat || pix == nil {
                     glAttributes.remove(at: index)
                 } else {
+                    var attArray = glAttributes.map({ (value: _CGLPixelFormatAttribute) -> String in
+                        return attributeLookUp[value.rawValue]!
+                    })
+                    attArray.removeLast()
+
+                    mpv.sendVerbose("Created CGL pixel format with attributes: " +
+                                    "\(attArray.joined(separator: ", "))")
                     break verLoop
                 }
             }