From 1a18fdd77cb33ad622f1497e7adef1b1c91baae2 Mon Sep 17 00:00:00 2001
From: "HuYingzhuo(hugo/hyzboy)" <hyzboy@outlook.com>
Date: Mon, 20 Jun 2022 21:40:28 +0800
Subject: [PATCH] added FullScreenRect example.

---
 example/Vulkan/FullScreenRect.cpp | 89 +++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)

diff --git a/example/Vulkan/FullScreenRect.cpp b/example/Vulkan/FullScreenRect.cpp
index e69de29b..aeb0c6e5 100644
--- a/example/Vulkan/FullScreenRect.cpp
+++ b/example/Vulkan/FullScreenRect.cpp
@@ -0,0 +1,89 @@
+// 全屏矩形
+// 该范例用于演示使用索引画一个矩形，但是不传递顶点信息。
+
+#include"VulkanAppFramework.h"
+#include<hgl/math/Math.h>
+
+using namespace hgl;
+using namespace hgl::graph;
+
+constexpr uint32_t SCREEN_WIDTH=256;
+constexpr uint32_t SCREEN_HEIGHT=256;
+
+static Vector4f color(1,1,1,1);
+
+class TestApp:public VulkanApplicationFramework
+{
+private:
+
+    MaterialInstance *  material_instance   =nullptr;
+    RenderableInstance *renderable_instance =nullptr;
+
+    Pipeline *          pipeline            =nullptr;
+
+private:
+
+    bool InitMaterial()
+    {
+        material_instance=db->CreateMaterialInstance(OS_TEXT("res/material/fullscreen"));
+        if(!material_instance)return(false);
+
+        BindCameraUBO(material_instance);
+        
+        pipeline=CreatePipeline(material_instance,InlinePipeline::Solid2D,Prim::Fan);
+        
+        return pipeline;
+    }
+
+    bool InitVBO()
+    {        
+        auto render_obj=db->CreateRenderable(4);
+        if(!render_obj)return(false);
+
+        renderable_instance=db->CreateRenderableInstance(render_obj,material_instance,pipeline);
+
+        return(true);
+    }
+
+public:
+
+    bool Init()
+    {
+        if(!VulkanApplicationFramework::Init(SCREEN_WIDTH,SCREEN_HEIGHT))
+            return(false);
+
+        if(!InitMaterial())
+            return(false);
+
+        if(!InitVBO())
+            return(false);
+            
+        BuildCommandBuffer(renderable_instance);
+
+        return(true);
+    }
+
+    void Resize(int w,int h)override
+    {
+        VulkanApplicationFramework::Resize(w,h);
+
+        BuildCommandBuffer(renderable_instance);
+    }
+};//class TestApp:public VulkanApplicationFramework
+
+int main(int,char **)
+{
+    #ifdef _DEBUG
+    if(!CheckStrideBytesByFormat())
+        return 0xff;
+    #endif//
+
+    TestApp app;
+
+    if(!app.Init())
+        return(-1);
+
+    while(app.Run());
+
+    return 0;
+}