Function SaveEXRScreenshot

BakingLab/BakingLab.cpp:222–272

Save a skydome texture as a DDS file

// Save a skydome texture as a DDS file
static void SaveEXRScreenshot(HWND parentWindow, ID3D11ShaderResourceView* screenSRV)
{
    // Read the texture data, and apply the inverse exposure scale
    ID3D11DevicePtr device;
    screenSRV->GetDevice(&device);

    TextureData<Float4> textureData;
    GetTextureData(device, screenSRV, textureData);

    const uint64 numTexels = textureData.Texels.size();
    for(uint64 i = 0; i < numTexels; ++i)
    {
        textureData.Texels[i] *= 1.0f / FP16Scale;
        textureData.Texels[i] = Float4::Clamp(textureData.Texels[i], 0.0f, FP16Max);
    }

    wchar currDirectory[MAX_PATH] = { 0 };
    GetCurrentDirectory(ArraySize_(currDirectory), currDirectory);

    wchar filePath[MAX_PATH] = { 0 };

    OPENFILENAME ofn;
    ZeroMemory(&ofn , sizeof(ofn));
    ofn.lStructSize = sizeof(ofn);
    ofn.hwndOwner = parentWindow;
    ofn.lpstrFile = filePath;
    ofn.nMaxFile = ArraySize_(filePath);
    ofn.lpstrFilter = L"All Files (*.*)\0*.*\0EXR Files (*.exr)\0*.exr\0";
    ofn.nFilterIndex = 2;
    ofn.lpstrFileTitle = nullptr;
    ofn.nMaxFileTitle = 0;
    ofn.lpstrInitialDir = nullptr;
    ofn.lpstrTitle = L"Save Screenshot As..";
    ofn.lpstrDefExt = L"exr";
    ofn.Flags = OFN_OVERWRITEPROMPT;
    bool succeeded = GetSaveFileName(&ofn) != 0;
    SetCurrentDirectory(currDirectory);

    if(succeeded)
    {
        try
        {
            SaveTextureAsEXR(textureData, filePath);
        }
        catch(Exception e)
        {
            std::wstring errorString = L"Error occured while saving screenshot as an EXR file:\n" + e.GetMessage();
            MessageBox(parentWindow, errorString.c_str(), L"Error", MB_OK | MB_ICONERROR);
        }
    }
}

// Bakes lookup textures for computing environment specular from radiance encoded as spherical harmonics.
static void GenerateSHSpecularLookupTextures(ID3D11Device* device)