Add Cocoa graphics switching to glfwinfo

tests/glfwinfo.c

@@ -100,6 +100,7 @@ static void usage(void)
     printf("      --srgb                request an sRGB capable framebuffer\n");
     printf("      --singlebuffer        request single-buffering\n");
     printf("      --no-error            request a context that does not emit errors\n");
+    printf("      --graphics-switching  request macOS graphics switching\n");
 }
 
 static void error_callback(int error, const char* description)
@@ -369,7 +370,8 @@ int main(int argc, char** argv)
            MAJOR, MINOR, PROFILE, ROBUSTNESS, VERSION,
            REDBITS, GREENBITS, BLUEBITS, ALPHABITS, DEPTHBITS, STENCILBITS,
            ACCUMREDBITS, ACCUMGREENBITS, ACCUMBLUEBITS, ACCUMALPHABITS,
-           AUXBUFFERS, SAMPLES, STEREO, SRGB, SINGLEBUFFER, NOERROR_SRSLY };
+           AUXBUFFERS, SAMPLES, STEREO, SRGB, SINGLEBUFFER, NOERROR_SRSLY,
+           GRAPHICS_SWITCHING };
     const struct option options[] =
     {
         { "behavior",           1, NULL, BEHAVIOR },
@@ -401,6 +403,7 @@ int main(int argc, char** argv)
         { "srgb",               0, NULL, SRGB },
         { "singlebuffer",       0, NULL, SINGLEBUFFER },
         { "no-error",           0, NULL, NOERROR_SRSLY },
+        { "graphics-switching", 0, NULL, GRAPHICS_SWITCHING },
         { NULL, 0, NULL, 0 }
     };
 
@@ -615,6 +618,9 @@ int main(int argc, char** argv)
             case NOERROR_SRSLY:
                 glfwWindowHint(GLFW_CONTEXT_NO_ERROR, GLFW_TRUE);
                 break;
+            case GRAPHICS_SWITCHING:
+                glfwWindowHint(GLFW_COCOA_GRAPHICS_SWITCHING, GLFW_TRUE);
+                break;
             default:
                 usage();
                 exit(EXIT_FAILURE);