Initial work

external/android-emugl/host/libs/libOpenglRender/NativeSubWindow_x11.cpp

@@ -0,0 +1,105 @@
+/*
+* Copyright (C) 2011 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+#include "NativeSubWindow.h"
+
+#include <stdio.h>
+
+static Bool WaitForMapNotify(Display *d, XEvent *e, char *arg) {
+    if (e->type == MapNotify && e->xmap.window == (Window)arg) {
+        return 1;
+    }
+    return 0;
+}
+
+static Bool WaitForConfigureNotify(Display *d, XEvent *e, char *arg) {
+    if (e->type == ConfigureNotify && e->xmap.window == (Window)arg) {
+        return 1;
+    }
+    return 0;
+}
+
+static Display *s_display = NULL;
+
+EGLNativeWindowType createSubWindow(FBNativeWindowType p_window,
+                                    int x,
+                                    int y,
+                                    int width,
+                                    int height,
+                                    SubWindowRepaintCallback repaint_callback,
+                                    void* repaint_callback_param) {
+   // The call to this function is protected by a lock
+   // in FrameBuffer so it is safe to check and initialize s_display here
+   if (!s_display) {
+       s_display = XOpenDisplay(NULL);
+   }
+
+    XSetWindowAttributes wa;
+    wa.event_mask = StructureNotifyMask;
+    wa.override_redirect = True;
+    Window win = XCreateWindow(s_display,
+                               p_window,
+                               x,
+                               y,
+                               width,
+                               height,
+                               0,
+                               CopyFromParent,
+                               CopyFromParent,
+                               CopyFromParent,
+                               CWEventMask,
+                               &wa);
+    XMapWindow(s_display,win);
+    XSetWindowBackground(s_display, win, BlackPixel(s_display, 0));
+    XEvent e;
+    XIfEvent(s_display, &e, WaitForMapNotify, (char *)win);
+    return win;
+}
+
+void destroySubWindow(EGLNativeWindowType win) {
+    if (!s_display) {
+        return;
+    }
+    XDestroyWindow(s_display, win);
+}
+
+int moveSubWindow(FBNativeWindowType p_parent_window,
+                  EGLNativeWindowType p_sub_window,
+                  int x,
+                  int y,
+                  int width,
+                  int height) {
+    // This value is set during create, so if it is still null, simply
+    // return because the global state is corrupted
+    if (!s_display) {
+        return false;
+    }
+
+    // This prevents flicker on resize.
+    XSetWindowBackgroundPixmap(s_display, p_sub_window, None);
+
+    int ret = XMoveResizeWindow(
+                s_display,
+                p_sub_window,
+                x,
+                y,
+                width,
+                height);
+
+    XEvent e;
+    XIfEvent(s_display, &e, WaitForConfigureNotify, (char *)p_sub_window);
+
+    return ret;
+}