正确输出显示器数量，以及显示模式

example/NullWindow/CMakeLists.txt

@@ -1,3 +1,3 @@
 add_executable(NullWindow main.cpp)
 
-target_link_libraries(NullWindow PRIVATE MathGeoLib glfw GL)
+target_link_libraries(NullWindow PRIVATE MathGeoLib glfw GL ULRE.RenderDevice)

example/NullWindow/main.cpp

@@ -1,38 +1,68 @@
-#include<GLFW/glfw3.h>
+#include<hgl/render/device/RenderDevice.h>
+#include<iostream>
+
+using namespace hgl;
+
+void put(const struct VideoMode *vm)
+{
+    std::cout<<"\t"<<vm->width<<"x"<<vm->height<<","<<vm->bit<<"bits,"<<vm->freq<<"hz";
+}
+
+void put(const struct Display *disp)
+{
+    std::cout<<"["<<disp->name.c_str()<<"]["<<disp->width<<"x"<<disp->height<<"]["<<disp->x<<","<<disp->y<<"]"<<std::endl;
+
+    std::cout<<"\tcurrent video mode: ";
+    put(disp->GetCurVideoMode());
+    std::cout<<std::endl;
+
+    const ObjectList<VideoMode> &vml=disp->GetVideoModeList();
+
+    for(int i=0;i<vml.GetCount();i++)
+    {
+        std::cout<<"\t"<<i<<" : ";
+        put(vml[i]);
+        std::cout<<std::endl;
+    }
+}
 
 int main(void)
 {
-    GLFWwindow* window;
+    RenderDevice *device=CreateRenderDeviceGLFW();
 
-    /* Initialize the library */
+    if(!device)
-    if (!glfwInit())
-        return -1;
-
-    /* Create a windowed mode window and its OpenGL context */
-    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
-
-    if (!window)
     {
-        glfwTerminate();
+        std::cerr<<"Create RenderDevice(GLFW) failed."<<std::endl;
         return -1;
     }
 
-    /* Make the window's context current */
+    if(!device->Init())
-    glfwMakeContextCurrent(window);
-
-    /* Loop until the user closes the window */
-    while (!glfwWindowShouldClose(window))
     {
-        /* Render here */
+        std::cerr<<"Init RenderDevice(GLFW) failed."<<std::endl;
-        glClear(GL_COLOR_BUFFER_BIT);
+        return -2;
-
+    }
-        /* Swap front and back buffers */
+
-        glfwSwapBuffers(window);
+    {
-
+        const UTF8String device_name=device->GetName();
-        /* Poll for and process events */
+
-        glfwPollEvents();
+        std::cout<<"RenderDevice: "<<device_name.c_str()<<std::endl;
+    }
+
+    List<Display *> disp_list;
+
+    device->GetDisplayList(disp_list);
+
+    const int count=disp_list.GetCount();
+
+    std::cout<<"Device have "<<count<<" display."<<std::endl;
+
+    for(int i=0;i<count;i++)
+    {
+        std::cout<<"Display "<<i<<" ";
+        put(GetObject(disp_list,i));
+
+        std::cout<<std::endl;
     }
 
-    glfwTerminate();
     return 0;
 }

inc/hgl/render/device/RenderDevice.h

@@ -33,8 +33,8 @@ namespace hgl
 
     public:
 
-        virtual const VideoMode *GetCurVideoMode()=0;
+        virtual const VideoMode *GetCurVideoMode()const=0;
-        virtual const ObjectList<VideoMode> &GetVideoModeList()=0;
+        virtual const ObjectList<VideoMode> &GetVideoModeList()const=0;
     };
 
     struct WindowSetup
@@ -108,7 +108,7 @@ namespace hgl
 
         virtual const UTF8String                GetName()=0;                                        ///<取得设备名称
 
-        virtual const void                      GetDisplayList(List<Display *> &);                  ///<取得显示屏列表
+        virtual const void                      GetDisplayList(List<Display *> &)=0;                ///<取得显示屏列表
         virtual const Display *                 GetDefaultDisplay()=0;                              ///<取得默认显示屏
 
     public:

src/RenderDevice/GLFW/RenderDeviceGLFW.cpp

@@ -22,13 +22,13 @@ namespace hgl
 
         public:
 
-            const VideoMode *GetCurVideoMode()override{return cur_video_mode;}
+            const VideoMode *GetCurVideoMode()const override{return cur_video_mode;}
-            const ObjectList<VideoMode> &GetVideoModeList()override{return video_mode_list;}
+            const ObjectList<VideoMode> &GetVideoModeList()const override{return video_mode_list;}
         };
 
         VideoMode *ConvertVideoMode(const GLFWvidmode *mode)
         {
-            if(mode)
+            if(!mode)
                 return nullptr;
 
             VideoMode *vm=new VideoMode;
@@ -95,12 +95,12 @@ namespace hgl
         const bool Init()override{return true;}
         const void Close()override{};
 
-        const UTF8String                GetName()override                                           ///<取得设备名称
+        const UTF8String GetName()override
         {
             return UTF8String("GLFW ")+UTF8String(glfwGetVersionString());
         }
 
-        const void GetDisplayList(List<Display *> &disp_list)                                        ///<取得显示屏列表
+        const void GetDisplayList(List<Display *> &disp_list) override
         {
             int count=0;
 
@@ -110,7 +110,7 @@ namespace hgl
                 disp_list+=GetDisplayAttrib(ml[i]);
         }
 
-        const Display *                 GetDefaultDisplay()
+        const Display *                 GetDefaultDisplay() override
         {
             if(!default_display)
                 default_display=GetDisplayAttrib(glfwGetPrimaryMonitor());