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add support for window resize

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This commit is contained in:
Zack Buhman 2025-12-31 20:03:41 -06:00
parent 4d9e6d675d
commit 03e76232d6
1 changed files with 119 additions and 54 deletions
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173
main.cpp
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@ -37,6 +37,7 @@ HRESULT InitWindow(HINSTANCE hInstance, int nCmdShow);
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
HRESULT InitDirect3DDevice();
void Render();
BOOL Resize();
struct SimpleVertex {
D3DXVECTOR3 Pos;
@ -44,6 +45,13 @@ struct SimpleVertex {
D3DXVECTOR2 Texture;
};
struct WindowSize {
UINT Width;
UINT Height;
};
WindowSize g_ViewportSize;
void print(LPCSTR fmt, ...)
{
va_list args;
@ -87,11 +95,11 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLi
TranslateMessage(&msg);
DispatchMessage(&msg);
} else {
Render();
if (Resize())
Render();
}
}
system("pause");
return 0;
}
@ -110,10 +118,11 @@ HRESULT InitWindow(HINSTANCE hInstance, int nCmdShow)
return E_FAIL;
// create window
RECT rc = { 0, 0, 640, 480 };
RECT rc = { 0, 0, 320, 240 };
AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);
UINT width = rc.right - rc.left;
UINT height = rc.bottom - rc.top;
AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);
print("width height %d %d\n", width, height);
g_hWnd = CreateWindow(L"d3d10wc",
L"d3d10", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
@ -153,6 +162,71 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
return 0;
}
HRESULT InitDirect3DViews()
{
HRESULT hr;
// back buffer
ID3D10Texture2D * pBackBuffer;
hr = g_pSwapChain->GetBuffer(0, __uuidof(ID3D10Texture2D), (LPVOID *)&pBackBuffer);
if (FAILED(hr)) {
print("g_pSwapChain->GetBuffer\n");
return hr;
}
D3D10_TEXTURE2D_DESC backBufferSurfaceDesc;
pBackBuffer->GetDesc(&backBufferSurfaceDesc);
hr = g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &g_pRenderTargetView);
pBackBuffer->Release();
if (FAILED(hr)) {
print("g_pSwapChain->CreateRenderTargetView\n");
return hr;
}
// depth buffer
D3D10_TEXTURE2D_DESC descDepth;
descDepth.Width = backBufferSurfaceDesc.Width;
descDepth.Height = backBufferSurfaceDesc.Height;
descDepth.MipLevels = 1;
descDepth.ArraySize = 1;
descDepth.Format = DXGI_FORMAT_D32_FLOAT;
descDepth.SampleDesc.Count = 1;
descDepth.SampleDesc.Quality = 0;
descDepth.Usage = D3D10_USAGE_DEFAULT;
descDepth.BindFlags = D3D10_BIND_DEPTH_STENCIL;
descDepth.CPUAccessFlags = 0;
descDepth.MiscFlags = 0;
hr = g_pd3dDevice->CreateTexture2D(&descDepth, NULL, &g_pDepthStencil);
if (FAILED(hr))
return hr;
D3D10_DEPTH_STENCIL_VIEW_DESC descDSV;
descDSV.Format = descDepth.Format;
descDSV.ViewDimension = D3D10_DSV_DIMENSION_TEXTURE2D;
descDSV.Texture2D.MipSlice = 0;
hr = g_pd3dDevice->CreateDepthStencilView(g_pDepthStencil, &descDSV, &g_pDepthStencilView);
if (FAILED(hr))
return hr;
g_pd3dDevice->OMSetRenderTargets(1, &g_pRenderTargetView, g_pDepthStencilView);
// viewport
D3D10_VIEWPORT vp;
vp.Width = backBufferSurfaceDesc.Width;
vp.Height = backBufferSurfaceDesc.Height;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
g_pd3dDevice->RSSetViewports(1, &vp);
g_ViewportSize.Width = backBufferSurfaceDesc.Width;
g_ViewportSize.Height = backBufferSurfaceDesc.Height;
return true;
}
HRESULT InitDirect3DDevice()
{
RECT rc;
@ -200,56 +274,7 @@ HRESULT InitDirect3DDevice()
}
print("driverType %d\n", driverType);
// back buffer
ID3D10Texture2D * pBackBuffer;
hr = g_pSwapChain->GetBuffer(0, __uuidof(ID3D10Texture2D), (LPVOID *)&pBackBuffer);
if (FAILED(hr)) {
print("g_pSwapChain->GetBuffer\n");
return hr;
}
hr = g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &g_pRenderTargetView);
pBackBuffer->Release();
if (FAILED(hr)) {
print("g_pSwapChain->CreateRenderTargetView\n");
return hr;
}
// depth buffer
D3D10_TEXTURE2D_DESC descDepth;
descDepth.Width = width;
descDepth.Height = height;
descDepth.MipLevels = 1;
descDepth.ArraySize = 1;
descDepth.Format = DXGI_FORMAT_D32_FLOAT;
descDepth.SampleDesc.Count = 1;
descDepth.SampleDesc.Quality = 0;
descDepth.Usage = D3D10_USAGE_DEFAULT;
descDepth.BindFlags = D3D10_BIND_DEPTH_STENCIL;
descDepth.CPUAccessFlags = 0;
descDepth.MiscFlags = 0;
hr = g_pd3dDevice->CreateTexture2D(&descDepth, NULL, &g_pDepthStencil);
if (FAILED(hr))
return hr;
D3D10_DEPTH_STENCIL_VIEW_DESC descDSV;
descDSV.Format = descDepth.Format;
descDSV.ViewDimension = D3D10_DSV_DIMENSION_TEXTURE2D;
descDSV.Texture2D.MipSlice = 0;
hr = g_pd3dDevice->CreateDepthStencilView(g_pDepthStencil, &descDSV, &g_pDepthStencilView);
if (FAILED(hr))
return hr;
g_pd3dDevice->OMSetRenderTargets(1, &g_pRenderTargetView, g_pDepthStencilView);
// viewport
D3D10_VIEWPORT vp;
vp.Width = width;
vp.Height = height;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
g_pd3dDevice->RSSetViewports(1, &vp);
InitDirect3DViews();
// texture
HRSRC hSeafloorRes = FindResource(NULL, L"RES_SEAFLOOR", RT_RCDATA);
@ -452,6 +477,46 @@ HRESULT InitDirect3DDevice()
return S_OK;
}
BOOL Resize()
{
RECT rc;
GetClientRect(g_hWnd, &rc);
UINT width = rc.right - rc.left;
UINT height = rc.bottom - rc.top;
if (width == 0 || height == 0)
return false;
// no need to resize if the client area is equal to the current buffer area
if (width == g_ViewportSize.Width && height == g_ViewportSize.Height)
return true;
//g_pd3dDevice->OMSetRenderTargets(1, NULL, NULL);
g_pRenderTargetView->Release();
g_pDepthStencil->Release();
g_pDepthStencilView->Release();
g_pSwapChain->ResizeBuffers(1,
width,
height,
DXGI_FORMAT_R8G8B8A8_UNORM,
0);
InitDirect3DViews();
float fFov = (float)D3DX_PI * 0.5f;
float fAspect = width / (float)height;
float fNear = 0.1f;
float fFar = 100.0f;
D3DXMatrixPerspectiveFovLH(&g_Projection,
fFov,
fAspect,
fNear,
fFar);
return true;
}
void Render()
{
static float t = 0.0f;