bitmap texture

class bitmap_t : public wt::texture::texture_t

Texture defined via a 2D bitmap. Texture filtering is configurable, see wt::bitmap::texture2d_config_t.

Public Types

using texture2d_t = bitmap::texture2d_t

Public Functions

inline bitmap_t(std::string id, private_token_t)

bitmap_t(bitmap_t&&) = default

virtual ~bitmap_t() noexcept = default

inline const auto &get_texture() const noexcept

Returns the underlying 2D texture.

inline virtual vec2_t resolution() const noexcept override

Returns texture resolution represented via \( \frac{\text{texels}}{\vec{uv}} \). May return an approximation. Can be infinite, e.g., for analytic textures. Can be 1, for constant textures.

inline virtual std::shared_ptr<spectrum::spectrum_real_t> mean_spectrum() const noexcept override

Average spectrum of the texture. Returns nullptr when an average spectrum cannot be computed.

inline auto get_filter_config() const noexcept

Returns the underlying texture filering configuration.

inline bool is_RGB() const noexcept

Returns TRUE if the underlying bitmap contains RGB or RGBA data.

inline virtual std::optional<f_t> mean_value(wavenumber_t k) const noexcept override

Average value of the texture. Returns std::nullopt when an average value cannot be computed.

inline virtual vec4_t get_RGBA(const texture_query_t &query) const noexcept override

Samples the texture. Returns filtered RGBA data, without spectral upsampling. Ignores query.k. Only relevant for some textures.

inline virtual vec2_t f(const texture_query_t &query) const noexcept override

Samples the texture. Returns spectrally upsampled (to wavenumber query.k) result.

Returns:

Spectral luminance value and alpha (if any) pair.

virtual scene::element::info_t description() const override

Public Static Functions

static std::shared_ptr<bitmap_t> load(std::string id, scene::loader::loader_t *loader, const scene::loader::node_t &node, const wt::wt_context_t &context)