[WIP] Viewports backend, 2

imgui-binding/src/main/java/imgui/ImGuiIO.java

@@ -590,6 +590,75 @@ public final class ImGuiIO {
         ImGui::GetIO().ConfigDockingTransparentPayload = value;
     */
 
+    // Viewport options (when ImGuiConfigFlags_ViewportsEnable is set)
+
+    /**
+     * Set to make all floating imgui windows always create their own viewport.
+     * Otherwise, they are merged into the main host viewports when overlapping it. May also set ImGuiViewportFlags_NoAutoMerge on individual viewport.
+     */
+    public native boolean getConfigViewportsNoAutoMerge(); /*
+        return ImGui::GetIO().ConfigViewportsNoAutoMerge;
+    */
+
+    /**
+     * Set to make all floating imgui windows always create their own viewport.
+     * Otherwise, they are merged into the main host viewports when overlapping it. May also set ImGuiViewportFlags_NoAutoMerge on individual viewport.
+     */
+    public native void setConfigViewportsNoAutoMerge(boolean value); /*
+        ImGui::GetIO().ConfigViewportsNoAutoMerge = value;
+    */
+
+    /**
+     * Disable default OS task bar icon flag for secondary viewports. When a viewport doesn't want a task bar icon, ImGuiViewportFlags_NoTaskBarIcon will be set on it.
+     */
+    public native boolean getConfigViewportsNoTaskBarIcon(); /*
+        return ImGui::GetIO().ConfigViewportsNoTaskBarIcon;
+    */
+
+    /**
+     * Disable default OS task bar icon flag for secondary viewports. When a viewport doesn't want a task bar icon, ImGuiViewportFlags_NoTaskBarIcon will be set on it.
+     */
+    public native void setConfigViewportsNoTaskBarIcon(boolean value); /*
+        ImGui::GetIO().ConfigViewportsNoTaskBarIcon = value;
+    */
+
+    /**
+     * [BETA] Disable default OS window decoration flag for secondary viewports. When a viewport doesn't want window decorations,
+     * ImGuiViewportFlags_NoDecoration will be set on it. Enabling decoration can create subsequent issues at OS levels (e.g. minimum window size).
+     */
+    public native boolean getConfigViewportsNoDecoration(); /*
+        return ImGui::GetIO().ConfigViewportsNoDecoration;
+    */
+
+    /**
+     * [BETA] Disable default OS window decoration flag for secondary viewports. When a viewport doesn't want window decorations,
+     * ImGuiViewportFlags_NoDecoration will be set on it. Enabling decoration can create subsequent issues at OS levels (e.g. minimum window size).
+     */
+    public native void setConfigViewportsNoDecoration(boolean value); /*
+        ImGui::GetIO().ConfigViewportsNoDecoration = value;
+    */
+
+    /**
+     * Disable default OS parenting to main viewport for secondary viewports.
+     * By default, viewports are marked with ParentViewportId = <main_viewport>,
+     * expecting the platform back-end to setup a parent/child relationship between the OS windows (some back-end may ignore this).
+     * Set to true if you want the default to be 0, then all viewports will be top-level OS windows.
+     */
+    public native boolean getConfigViewportsNoDefaultParent(); /*
+        return ImGui::GetIO().ConfigViewportsNoDefaultParent;
+    */
+
+    /**
+     * Disable default OS parenting to main viewport for secondary viewports.
+     * By default, viewports are marked with ParentViewportId = <main_viewport>,
+     * expecting the platform back-end to setup a parent/child relationship between the OS windows (some back-end may ignore this).
+     * Set to true if you want the default to be 0, then all viewports will be top-level OS windows.
+     */
+    public native void setConfigViewportsNoDefaultParent(boolean value); /*
+        ImGui::GetIO().ConfigViewportsNoDefaultParent = value;
+    */
+
+
     /**
      * Time elapsed since last frame, in seconds.
      * <p>

imgui-binding/src/main/java/imgui/ImGuiPlatformIO.java

@@ -191,7 +191,7 @@ public final class ImGuiPlatformIO extends ImGuiStruct {
                     JNIEnv* env = Jni::GetEnv();\
                     env->SetLongField(jTmpViewport, Jni::GetBindingStructPtrID(), (intptr_t)vp);\
                     Jni::CallImPlatformFuncViewportSuppImVec2(env, platformCallback##name, jTmpViewport, jTmpImVec2);\
-                    Jni::ImVec2Cpy(env, jTmpImVec2, dst);\
+                    Jni::ImVec2Cpy(env, jTmpImVec2, &dst);\
                 }\
                 return dst;\
             }

imgui-binding/src/main/java/imgui/ImGuiViewport.java

@@ -38,14 +38,14 @@ public final class ImGuiViewport extends ImGuiStruct {
     */
 
     /**
-     * See ImGuiViewportFlags_.
+     * See {@link imgui.flag.ImGuiViewportFlags}.
      */
     public native int getFlags(); /*
         return IMGUI_VIEWPORT->Flags;
     */
 
     /**
-     * See ImGuiViewportFlags_.
+     * See {@link imgui.flag.ImGuiViewportFlags}.
      */
     public native void setFlags(int flags); /*
         IMGUI_VIEWPORT->Flags = flags;

imgui-binding/src/main/java/imgui/glfw/ImGuiImplGlfwNative.java

@@ -0,0 +1,24 @@
+package imgui.glfw;
+
+final class ImGuiImplGlfwNative {
+    private ImGuiImplGlfwNative() {
+    }
+
+    /*JNI
+        #if defined(_WIN32)
+            #include <windows.h>
+        #endif
+     */
+
+    // GLFW hack: Hide icon from task bar
+    // Applied only for windows
+    static native void win32hideFromTaskBar(long hwndPtr); /*
+        #if defined(_WIN32)
+            HWND hwnd = (HWND)hwndPtr;
+            LONG ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
+            ex_style &= ~WS_EX_APPWINDOW;
+            ex_style |= WS_EX_TOOLWINDOW;
+            ::SetWindowLong(hwnd, GWL_EXSTYLE, ex_style);
+        #endif
+    */
+}