cocoa-cb: add Apple Software Renderer support

by default the pixel format creation falls back to software renderer
when everything fails. this is mostly needed for VMs. additionally one
can directly request an sw renderer or exclude it entirely.

(cherry picked from commit 8d2d0f06403b6777e4b591fa84df57b55e9b7809)

2 files changed, 29 insertions, 3 deletions

diff --git a/video/out/cocoa-cb/video_layer.swift b/video/out/cocoa-cb/video_layer.swift
index b3893273b1..d6456abe9b 100644
--- a/video/out/cocoa-cb/video_layer.swift
+++ b/video/out/cocoa-cb/video_layer.swift
@@ -32,6 +32,7 @@ class VideoLayer: CAOpenGLLayer {
     var needsFlip: Bool = false
     var canDrawOffScreen: Bool = false
     var cglContext: CGLContextObj? = nil
+    var cglPixelFormat: CGLPixelFormatObj? = nil
     var surfaceSize: NSSize?
 
     enum Draw: Int { case normal = 1, atomic, atomicEnd }
@@ -62,7 +63,8 @@ class VideoLayer: CAOpenGLLayer {
         autoresizingMask = [.layerWidthSizable, .layerHeightSizable]
         backgroundColor = NSColor.black.cgColor
 
-        CGLCreateContext(copyCGLPixelFormat(forDisplayMask: 0), nil, &cglContext)
+        cglPixelFormat = copyCGLPixelFormat(forDisplayMask: 0)
+        CGLCreateContext(cglPixelFormat!, nil, &cglContext)
         var i: GLint = 1
         CGLSetParameter(cglContext!, kCGLCPSwapInterval, &i)
         CGLSetCurrentContext(cglContext!)
@@ -147,6 +149,8 @@ class VideoLayer: CAOpenGLLayer {
     }
 
     override func copyCGLPixelFormat(forDisplayMask mask: UInt32) -> CGLPixelFormatObj {
+        if cglPixelFormat != nil { return cglPixelFormat! }
+
         let glVersions: [CGLOpenGLProfile] = [
             kCGLOGLPVersion_3_2_Core,
             kCGLOGLPVersion_Legacy
@@ -157,6 +161,8 @@ class VideoLayer: CAOpenGLLayer {
         var npix: GLint = 0
 
         verLoop : for ver in glVersions {
+            if mpv.macOpts!.cocoa_cb_sw_renderer == 1 { break }
+
             var glAttributes: [CGLPixelFormatAttribute] = [
                 kCGLPFAOpenGLProfile, CGLPixelFormatAttribute(ver.rawValue),
                 kCGLPFAAccelerated,
@@ -177,9 +183,28 @@ class VideoLayer: CAOpenGLLayer {
             }
         }
 
+        if (err != kCGLNoError || pix == nil) && mpv.macOpts!.cocoa_cb_sw_renderer != 0 {
+            if mpv.macOpts!.cocoa_cb_sw_renderer == -1 {
+                let errS = String(cString: CGLErrorString(err))
+                mpv.sendWarning("Couldn't create hardware accelerated CGL " +
+                                "pixel format, falling back to software " +
+                                "renderer: \(errS) (\(err.rawValue))")
+            }
+
+            let glAttributes: [CGLPixelFormatAttribute] = [
+                kCGLPFAOpenGLProfile, CGLPixelFormatAttribute(kCGLOGLPVersion_3_2_Core.rawValue),
+                kCGLPFARendererID, CGLPixelFormatAttribute(UInt32(kCGLRendererGenericFloatID)),
+                kCGLPFADoubleBuffer,
+                kCGLPFABackingStore,
+                _CGLPixelFormatAttribute(rawValue: 0)
+            ]
+
+            err = CGLChoosePixelFormat(glAttributes, &pix, &npix)
+        }
+
         if err != kCGLNoError || pix == nil {
             let errS = String(cString: CGLErrorString(err))
-            mpv.sendError("Couldn't create CGL pixel format: \(errS) (\(err.rawValue))")
+            mpv.sendError("Couldn't create any CGL pixel format: \(errS) (\(err.rawValue))")
             exit(1)
         }
         return pix!
diff --git a/video/out/opengl/common.c b/video/out/opengl/common.c
index 4b0cbcc1c4..00692f0350 100644
--- a/video/out/opengl/common.c
+++ b/video/out/opengl/common.c
@@ -42,7 +42,8 @@ static bool is_software_gl(GL *gl)
            strcmp(renderer, "Software Rasterizer") == 0 ||
            strstr(renderer, "llvmpipe") ||
            strcmp(vendor, "Microsoft Corporation") == 0 ||
-           strcmp(renderer, "Mesa X11") == 0;
+           strcmp(renderer, "Mesa X11") == 0 ||
+           strcmp(renderer, "Apple Software Renderer") == 0;
 }
 
 static void GLAPIENTRY dummy_glBindFramebuffer(GLenum target, GLuint framebuffer)