log CGLErrorString for CGLChoosePixelFormat, enable OpenGL

multithreading https://developer.apple.com/library/mac/technotes/tn2085/_index.html
2014-09-30 17:42:27 -04:00
parent 848dccbcae
commit c4c4b3318a
1 changed files with 7 additions and 1 deletions
--- a/common/headless_view.cpp
+++ b/common/headless_view.cpp
@@ -20,7 +20,7 @@ HeadlessView::HeadlessView() {
    GLint num;
    CGLError error = CGLChoosePixelFormat(attributes, &pixelFormat, &num);
    if (error) {
-        fprintf(stderr, "Error pixel format\n");
+        fprintf(stderr, "Error pixel format: %s\n", CGLErrorString(error));
        return;
    }

@@ -30,6 +30,12 @@ HeadlessView::HeadlessView() {
        fprintf(stderr, "Error creating GL context object\n");
        return;
    }
+
+    error = CGLEnable(gl_context, kCGLCEMPEngine);
+    if (error != kCGLNoError ) {
+        fprintf(stderr, "Error enabling OpenGL multithreading\n");
+        return;
+    }
 #endif

 #if MBGL_USE_GLX