DirectX11CubemapTexture.hpp

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#ifndef DIRECTX11CUBEMAPTEXTURE_HPP_
#define DIRECTX11CUBEMAPTEXTURE_HPP_
 
#include <Core/OSDef.hpp>
#include <Runtime/Texture.hpp>
#include <d3d11.h>
#include <wrl/client.h>
#include <array>
#include <cstdint>
#include <string>
#include <vector>
 
namespace Sleak {
namespace RenderEngine {
 
/// D3D11 cubemap texture, loadable from six face images or a single equirectangular panorama.
class DirectX11CubemapTexture : public ::Sleak::Texture {
public:
    DirectX11CubemapTexture(ID3D11Device* device);
    ~DirectX11CubemapTexture() override;
 
    /// Loads and uploads 6 face images: +X, -X, +Y, -Y, +Z, -Z.
    bool LoadCubemap(const std::array<std::string, 6>& facePaths);
    /// Loads a single equirectangular panorama and resamples it into 6 cube faces.
    bool LoadEquirectangular(const std::string& path, uint32_t faceSize = 512);
 
    // Texture interface
    /// Unused for cubemaps; load via LoadCubemap/LoadEquirectangular instead.
    bool LoadFromMemory(const void* data, uint32_t width, uint32_t height,
                        TextureFormat format) override;
    /// Unused for cubemaps; load via LoadCubemap/LoadEquirectangular instead.
    bool LoadFromFile(const std::string& filePath) override;
 
    void Bind(uint32_t slot = 0) const override;
    void Unbind() const override;
 
    void SetFilter(TextureFilter filter) override;
    void SetWrapMode(TextureWrapMode wrapMode) override;
 
    uint32_t GetWidth() const override { return m_width; }
    uint32_t GetHeight() const override { return m_height; }
    TextureFormat GetFormat() const override { return TextureFormat::RGBA8; }
    TextureType GetType() const override { return TextureType::TextureCube; }
 
private:
    /// Builds the cubemap texture array and shader resource view from decoded face pixels.
    bool CreateCubemapFromFaces(const std::vector<unsigned char*>& faceData,
                                uint32_t faceSize);
    void CreateSamplerState();
 
    Microsoft::WRL::ComPtr<ID3D11Device> m_device;
    Microsoft::WRL::ComPtr<ID3D11DeviceContext> m_deviceContext;
    Microsoft::WRL::ComPtr<ID3D11Texture2D> m_texture;
    Microsoft::WRL::ComPtr<ID3D11ShaderResourceView> m_shaderResourceView;
    Microsoft::WRL::ComPtr<ID3D11SamplerState> m_samplerState;
 
    uint32_t m_width = 0;
    uint32_t m_height = 0;
};
 
}  // namespace RenderEngine
}  // namespace Sleak
 
#endif  // DIRECTX11CUBEMAPTEXTURE_HPP_