Add glfwGetMonitorWorkarea

From upstream: be295ccbea

glfw/cocoa_monitor.m

@@ -468,6 +468,24 @@ void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor,
         *yscale = (float) (pixels.size.height / points.size.height);
 }
 
+void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor, int* xpos, int* ypos, int *width, int *height)
+{
+    NSScreen *resultScreen;
+    for (NSScreen *screen in [NSScreen screens]) {
+        if ([[[screen deviceDescription] valueForKey:@"NSScreenNumber"] intValue] == monitor->ns.displayID) {
+            resultScreen = screen;
+            break;
+        }
+    }
+
+    NSRect frameRect = [[NSScreen resultScreen] visibleFrame];
+
+    *xpos = NSMinX(frameRect);
+    *ypos = NSMinY(frameRect);
+    *width = NSMaxX(frameRect);
+    *height = NSMaxY(frameRect);
+}
+
 GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
 {
     CFArrayRef modes;

glfw/glfw3.h

@@ -1937,6 +1937,31 @@ GLFWAPI GLFWmonitor* glfwGetPrimaryMonitor(void);
  */
 GLFWAPI void glfwGetMonitorPos(GLFWmonitor* monitor, int* xpos, int* ypos);
 
+/*! @brief Returns the work area of the monitor.
+ *
+ *  This function returns the position, in screen coordinates, of the upper-left
+ *  corner of the specified monitor.
+ *
+ *  Any or all of the position arguments may be `NULL`.  If an error occurs, all
+ *  non-`NULL` position arguments will be set to zero.
+ *
+ *  @param[in] monitor The monitor to query.
+ *  @param[out] xpos Where to store the monitor x-coordinate, or `NULL`.
+ *  @param[out] ypos Where to store the monitor y-coordinate, or `NULL`.
+ *
+ *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
+ *  GLFW_PLATFORM_ERROR.
+ *
+ *  @thread_safety This function must only be called from the main thread.
+ *
+ *  @sa @ref monitor_properties
+ *
+ *  @since Added in version 3.0.
+ *
+ *  @ingroup monitor
+ */
+GLFWAPI void glfwGetMonitorWorkarea(GLFWmonitor* monitor, int* xpos, int* ypos, int *width, int *height);
+
 /*! @brief Returns the physical size of the monitor.
  *
  *  This function returns the size, in millimetres, of the display area of the

glfw/internal.h

@@ -619,6 +619,7 @@ void _glfwPlatformFreeMonitor(_GLFWmonitor* monitor);
 void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos);
 void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor,
                                          float* xscale, float* yscale);
+void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor, int* xpos, int* ypos, int *width, int *height);
 GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count);
 void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode);
 GLFWbool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp);

glfw/monitor.c

@@ -330,6 +330,25 @@ GLFWAPI void glfwGetMonitorPos(GLFWmonitor* handle, int* xpos, int* ypos)
     _glfwPlatformGetMonitorPos(monitor, xpos, ypos);
 }
 
+GLFWAPI void glfwGetMonitorWorkarea(GLFWmonitor* handle, int* xpos, int* ypos, int* width, int* height)
+{
+    _GLFWmonitor* monitor = (_GLFWmonitor*) handle;
+    assert(monitor != NULL);
+
+    if (xpos)
+        *xpos = 0;
+    if (ypos)
+        *ypos = 0;
+    if (width)
+        *width = 0;
+    if (width)
+        *width = 0;
+
+    _GLFW_REQUIRE_INIT();
+
+    _glfwPlatformGetMonitorWorkarea(monitor, xpos, ypos, width, height);
+}
+
 GLFWAPI void glfwGetMonitorPhysicalSize(GLFWmonitor* handle, int* widthMM, int* heightMM)
 {
     _GLFWmonitor* monitor = (_GLFWmonitor*) handle;

glfw/null_monitor.c

@@ -49,6 +49,10 @@ void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor,
         *yscale = 1.f;
 }
 
+void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor, int* xpos, int* ypos, int *width, int *height)
+{
+}
+
 GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* found)
 {
     return NULL;

glfw/x11_init.c

@@ -137,6 +137,8 @@ static void detectEWMH(void)
         getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE");
     _glfw.x11.NET_WM_WINDOW_TYPE_NORMAL =
         getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE_NORMAL");
+    _glfw.x11.NET_WORKAREA =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WORKAREA");
     _glfw.x11.NET_ACTIVE_WINDOW =
         getSupportedAtom(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
     _glfw.x11.NET_FRAME_EXTENTS =

glfw/x11_monitor.c

@@ -349,6 +349,22 @@ void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor,
         *yscale = _glfw.x11.contentScaleY;
 }
 
+void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor, int* xpos, int* ypos, int *width, int *height)
+{
+    if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
+    {
+        Atom* extents = NULL;
+
+        _glfwGetWindowPropertyX11(_glfw.x11.root, _glfw.x11.NET_WORKAREA, XA_CARDINAL, (unsigned char**) &extents);
+
+        *xpos = extents[0];
+        *ypos = extents[1];
+        *width = extents[2];
+        *height = extents[3];
+        XFree(extents);
+    }
+}
+
 GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
 {
     GLFWvidmode* result;

glfw/x11_platform.h

@@ -248,6 +248,7 @@ typedef struct _GLFWlibraryX11
     Atom            NET_WM_FULLSCREEN_MONITORS;
     Atom            NET_WM_WINDOW_OPACITY;
     Atom            NET_WM_CM_Sx;
+    Atom            NET_WORKAREA;
     Atom            NET_ACTIVE_WINDOW;
     Atom            NET_FRAME_EXTENTS;
     Atom            NET_REQUEST_FRAME_EXTENTS;