initial version including code to draw a triangle

7c1cc096 · Administrator · 7c1cc096 · 7c1cc096 · 7c1cc096 · 7c1cc096
Commit 7c1cc096 authored Dec 21, 2022 by Administrator
--- a/.gitignore
+++ b/.gitignore
+# Exclude .vs folder
+.vs/
+
+# Exclude x64 folder
+x64/
+
+# Exclude cso files
+*.cso
+
--- a/PracticeDx.sln
+++ b/PracticeDx.sln
+
+Microsoft Visual Studio Solution File, Format Version 12.00
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+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
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+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
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+		{A2C8534C-9AE3-4497-BF42-582D461455DA}.Debug|x64.Build.0 = Debug|x64
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+		{A2C8534C-9AE3-4497-BF42-582D461455DA}.Release|x86.ActiveCfg = Release|Win32
+		{A2C8534C-9AE3-4497-BF42-582D461455DA}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {F4D0EEF3-25D3-4579-86DD-668FD620BBD5}
+	EndGlobalSection
+EndGlobal
--- a/PracticeDx/PixelShader.hlsl
+++ b/PracticeDx/PixelShader.hlsl
+float4 main() : SV_TARGET
+{
+	return float4(1.0f, 1.0f, 1.0f, 1.0f);
+}
\ No newline at end of file
--- a/PracticeDx/PracticeDx.vcxproj
+++ b/PracticeDx/PracticeDx.vcxproj
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+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
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+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
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\ No newline at end of file
--- a/PracticeDx/PracticeDx.vcxproj.filters
+++ b/PracticeDx/PracticeDx.vcxproj.filters
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
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+    <FxCompile Include="PixelShader.hlsl">
+      <Filter>Shaders</Filter>
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+      <Filter>Shaders</Filter>
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+</Project>
\ No newline at end of file
--- a/PracticeDx/PracticeDx.vcxproj.user
+++ b/PracticeDx/PracticeDx.vcxproj.user
+<?xml version="1.0" encoding="utf-8"?>
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+  <PropertyGroup />
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\ No newline at end of file
--- a/PracticeDx/VertexShader.hlsl
+++ b/PracticeDx/VertexShader.hlsl
+float4 main(float2 pos : POSITION) : SV_POSITION
+{
+	return float4(pos.x, pos.y, 0.0f, 1.0f);
+}
\ No newline at end of file
--- a/PracticeDx/WinMain.cpp
+++ b/PracticeDx/WinMain.cpp
+// include the basic windows header file
+#include <windows.h>
+#include <windowsx.h>
+
+#include <d3d11.h>
+#pragma comment (lib, "d3d11.lib")
+
+#include <d3dcompiler.h>
+#pragma comment (lib, "d3dcompiler.lib")
+
+#include <wrl.h>
+
+// global declarations
+Microsoft::WRL::ComPtr<IDXGISwapChain>          swapchain;          // the pointer to the swap chain interface
+Microsoft::WRL::ComPtr<ID3D11Device>            dev;                // the pointer to our Direct3D device interface
+Microsoft::WRL::ComPtr<ID3D11DeviceContext>     devcon;             // the pointer to our Direct3D device context
+
+// 定义Targe View
+Microsoft::WRL::ComPtr<ID3D11RenderTargetView>  targetView;
+
+// Define Shader
+Microsoft::WRL::ComPtr<ID3D11PixelShader>       pPixelShader;
+Microsoft::WRL::ComPtr<ID3DBlob>                pCompiledPixelBlob;
+Microsoft::WRL::ComPtr<ID3D11VertexShader>      pVertexShader;
+Microsoft::WRL::ComPtr<ID3DBlob>                pCompiledVertexBlob;
+
+// Define vertex buffer
+Microsoft::WRL::ComPtr<ID3D11Buffer>            pVertexBuffer;
+// Create buffer description
+struct Vertex
+{
+    float x;
+    float y;
+};
+// create vertex buffer (1 2d triangle at center of screen)
+const Vertex vertices[] =
+{
+    { -0.0f,0.5f },
+    { 0.5f,-0.5f },
+    { -0.5f,-0.5f },
+};
+
+// Define input layout
+ID3D11InputLayout* pInputLayout;
+
+void DefineShader()
+{
+    // Load vertex shader file into BLOB, and create COM object of pixel shader
+    D3DReadFileToBlob(L"PixelShader.cso", &pCompiledPixelBlob);
+    dev->CreatePixelShader(pCompiledPixelBlob->GetBufferPointer(), pCompiledPixelBlob->GetBufferSize(), nullptr, &pPixelShader);
+
+    // Load pixel shader file into BLOB, and create COM object of vertex shader
+    D3DReadFileToBlob(L"VertexShader.cso", &pCompiledVertexBlob);
+    dev->CreateVertexShader(pCompiledVertexBlob->GetBufferPointer(), pCompiledVertexBlob->GetBufferSize(), nullptr, &pVertexShader);
+
+    // bind pixel shader
+    devcon->PSSetShader(pPixelShader.Get(), nullptr, 0u);
+    // bind vertex shader
+    devcon->VSSetShader(pVertexShader.Get(), nullptr, 0u);
+}
+
+void DefineVertexBuffer()
+{
+    D3D11_BUFFER_DESC bd = {};
+    bd.BindFlags = D3D11_BIND_VERTEX_BUFFER;
+    bd.Usage = D3D11_USAGE_DEFAULT;
+    bd.CPUAccessFlags = 0u;
+    bd.MiscFlags = 0u;
+    bd.ByteWidth = sizeof(vertices);
+    bd.StructureByteStride = sizeof(Vertex);
+
+    D3D11_SUBRESOURCE_DATA sd = {};
+    sd.pSysMem = vertices;
+
+    // Create vertex buffer
+    dev->CreateBuffer(&bd, &sd, &pVertexBuffer);
+}
+
+void DefineInputLayout()
+{
+    // Create input elements description, choosing whatever need to send to GPU
+    const D3D11_INPUT_ELEMENT_DESC ied[] =
+    {
+        { "Position",0,DXGI_FORMAT_R32G32_FLOAT,0,0,D3D11_INPUT_PER_VERTEX_DATA,0 },
+    };
+
+    // Create input layout, using the description Defined above
+    dev->CreateInputLayout
+    (
+        ied, 1, //(UINT)std::size(ied),
+        pCompiledVertexBlob->GetBufferPointer(),
+        pCompiledVertexBlob->GetBufferSize(),
+        &pInputLayout
+    );
+
+    // Bind layout to pipeline
+    // bind vertex layout
+    devcon->IASetInputLayout(pInputLayout);
+
+    // bind render target
+    devcon->OMSetRenderTargets(1u, targetView.GetAddressOf(), nullptr);
+}
+
+void DrawPrimitive()
+{
+    // Set the vertex buffer to use. Pick up the vertex buffer created in previous step.
+    // Bind vertex buffer to pipeline
+    const UINT stride = sizeof(Vertex);
+    const UINT offset = 0u;
+    devcon->IASetVertexBuffers(0u, 1u, pVertexBuffer.GetAddressOf(), &stride, &offset);
+
+    // Set the primitive type to use
+    // Set primitive topology to triangle list (groups of 3 vertices)
+    devcon->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
+
+    // Draw the triangle.
+    devcon->Draw((UINT)sizeof(vertices), 0u);
+}
+
+void drawTriangle()
+{
+    DefineShader();
+    DefineVertexBuffer();
+    DefineInputLayout();
+    DrawPrimitive();
+}
+
+// this function initializes and prepares Direct3D for use
+void InitD3D(HWND hWnd)
+{
+    // create a struct to hold information about the swap chain
+    DXGI_SWAP_CHAIN_DESC scd;
+
+    // clear out the struct for use
+    ZeroMemory(&scd, sizeof(DXGI_SWAP_CHAIN_DESC));
+
+    // fill the swap chain description struct
+    scd.BufferCount = 1;                                    // one back buffer
+    scd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;     // use 32-bit color
+    scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;      // how swap chain is to be used
+    scd.OutputWindow = hWnd;                                // the window to be used
+    scd.SampleDesc.Count = 4;                               // how many multisamples
+    scd.Windowed = TRUE;                                    // windowed/full-screen mode
+
+    // create a device, device context and swap chain using the information in the scd struct
+    D3D11CreateDeviceAndSwapChain(NULL,                         // IDXGIAdapter *pAdapter - Let DXGI take care of what adapter to use (default adapter)
+        D3D_DRIVER_TYPE_HARDWARE,     // D3D_DRIVER_TYPE DriverType - hardware or software, or others
+        NULL,                         // HMODULE Software
+        NULL,                         // UINT Flags
+        NULL,                         // D3D_FEATURE_LEVEL *pFeatureLevels
+        NULL,                         // UINT FeatureLevels
+        D3D11_SDK_VERSION,            // UINT SDKVersion
+        &scd,                         // DXGI_SWAP_CHAIN_DESC *pSwapChainDesc
+        &swapchain,                   // IDXGISwapChain **ppSwapChain
+        &dev,                         // ID3D11Device **ppDevice
+        NULL,                         // D3D_FEATURE_LEVEL *FeatureLevel
+        &devcon);                     // ID3D11DeviceContext **ppImmediateContext
+
+    // 从SwapChain中取得back buffer
+    Microsoft::WRL::ComPtr<ID3D11Texture2D> pBackBuffer;
+    swapchain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
+
+    // 根据back buffer，创建新的View Target
+    dev->CreateRenderTargetView(pBackBuffer.Get(), NULL, &targetView);
+
+    // 将渲染目标设置成我们新创建的View Target
+    devcon->OMSetRenderTargets(1, targetView.GetAddressOf(), NULL);
+
+    // 指定View Port
+    D3D11_VIEWPORT viewport;
+    ZeroMemory(&viewport, sizeof(D3D11_VIEWPORT));
+    // 控制View port的位置
+    viewport.TopLeftX = 0;
+    viewport.TopLeftY = 0;
+    viewport.Width = 800;
+    viewport.Height = 600;
+
+    devcon->RSSetViewports(1, &viewport);
+}
+
+// this is the function used to render a single frame
+void RenderFrame(void)
+{
+    // clear the back buffer to a deep blue
+    const float color[] = { 0.0f, 0.2f, 0.4f, 1.0f };
+    devcon->ClearRenderTargetView(targetView.Get(), color);
+
+    // do 3D rendering on the back buffer here
+    drawTriangle();
+
+    // switch the back buffer and the front buffer
+    // 切换显示，将back buffer的内容交换到front buffer
+    swapchain->Present(0, 0);
+}
+
+// this is the function that cleans up Direct3D and COM
+void CleanD3D()
+{
+    // close and release all existing COM objects
+    // changed to use smart pointer, do NOT need to manually release
+    // pPixelShader->Release();
+    // pCompiledPixelBlob->Release();
+    // pVertexShader->Release();
+    // pCompiledVertexBlob->Release();
+    // pVertexBuffer->Release();
+    // pInputLayout->Release();
+
+    // swapchain->Release();
+    // targetView->Release();
+    // dev->Release();
+    // devcon->Release();
+}
+
+// the WindowProc function prototype
+LRESULT CALLBACK WindowProc(HWND hWnd,
+    UINT message,
+    WPARAM wParam,
+    LPARAM lParam);
+
+// the entry point for any Windows program
+int WINAPI WinMain(HINSTANCE hInstance,
+    HINSTANCE hPrevInstance,
+    LPSTR lpCmdLine,
+    int nCmdShow)
+{
+    // the handle for the window, filled by a function
+    HWND hWnd;
+    // this struct holds information for the window class
+    WNDCLASSEX wc;
+
+    // clear out the window class for use
+    ZeroMemory(&wc, sizeof(WNDCLASSEX));
+
+    // fill in the struct with the needed information
+    wc.cbSize = sizeof(WNDCLASSEX);
+    wc.style = CS_HREDRAW | CS_VREDRAW;
+    wc.lpfnWndProc = WindowProc;
+    wc.hInstance = hInstance;
+    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+    wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
+    wc.lpszClassName = "WindowClass";
+
+    // register the window class
+    RegisterClassEx(&wc);
+
+    // create rectangle for client area
+    RECT wr = { 0, 0, 800, 600 };     // set the size only, but not the position
+    AdjustWindowRect(&wr, WS_OVERLAPPEDWINDOW, FALSE);  // adjust the size
+
+    // create the window and use the result as the handle
+    hWnd = CreateWindowEx(NULL,
+        "WindowClass",    // name of the window class
+        "Our First Windowed Program",   // title of the window
+        WS_OVERLAPPEDWINDOW,    // window style
+        300,    // x-position of the window
+        200,    // y-position of the window
+        800,    // width of the window
+        600,    // height of the window
+        NULL,    // we have no parent window, NULL
+        NULL,    // we aren't using menus, NULL
+        hInstance,    // application handle
+        NULL);    // used with multiple windows, NULL
+
+    // display the window on the screen
+    ShowWindow(hWnd, nCmdShow);
+
+    // set up and initialize Direct3D
+    InitD3D(hWnd);
+
+    // enter the main loop:
+
+    // this struct holds Windows event messages
+    MSG msg;
+
+    // wait for the next message in the queue, store the result in 'msg'
+    while (true)
+    {
+        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+        {
+            // translate keystroke messages into the right format
+            TranslateMessage(&msg);
+
+            // send the message to the WindowProc function
+            DispatchMessage(&msg);
+
+            // check if message to quit
+            if (msg.message == WM_QUIT)
+            {
+                break;
+            }
+        }
+        else
+        {
+            RenderFrame();
+        }
+    }
+
+    // clean up DirectX and COM
+    CleanD3D();
+
+    // return this part of the WM_QUIT message to Windows
+    return msg.wParam;
+}
+
+// this is the main message handler for the program
+LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+    // sort through and find what code to run for the message given
+    switch (message)
+    {
+        // this message is read when the window is closed
+    case WM_DESTROY:
+    {
+        // close the application entirely
+        PostQuitMessage(0);
+        return 0;
+    }
+
+    break;
+    }
+
+    // Handle any messages the switch statement didn't
+    return DefWindowProc(hWnd, message, wParam, lParam);
+}
\ No newline at end of file