namespace GL {
/**
-Three-dimensional texture. Consists of an array of texels in the shape of a
-right cuboid. Texture coordinates have a principal range of [0, 1].
+Three-dimensional texture, consisting of a cuboid-shaped array of texels.
*/
class Texture3D: public Texture3DBackend
{
private:
void init();
- void raw_data(const std::string &);
void storage(PixelFormat, unsigned, unsigned, unsigned);
void storage_levels(PixelFormat, unsigned, unsigned, unsigned, unsigned);
};
unsigned width = 0;
unsigned height = 0;
unsigned depth = 0;
- unsigned levels = 0;
Texture3D(unsigned);
public:
Texture3D() = default;
- /** Defines storage structure for the texture. If lv is zero, the number
- of mipmap levels is automatically determined from storage dimensions.
-
- Must be called before an image can be uploaded. Once storage is defined,
- it can't be changed. */
- void storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp, unsigned lv = 0);
-
- /** Updates the contents of the entire texture. Storage must be defined
- beforehand. The image data must have dimensions and format matching the
- defined storage. */
- void image(unsigned level, const void *data);
-
- /** Updates a cuboid-shaped region of the texture. Storage must be defined
- beforehand. The image data must be in a format mathing the defined storage
- and the update region must be fully inside the texture. */
- void sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data);
-
- /** Updates the contents of the entire texture from an image. If storage
- has not been defined, it will be set to match the image. In this case the
- image will be treated as a stack of square layers and its height must be
- divisible by its width. Otherwise the image must match the defined
- storage. */
+ /** Sets storage format and dimensions and allocates memory for the texture.
+ If lv is zero, a complete mipmap pyramid is automatically created. Storage
+ cannot be changed once set. */
+ void storage(PixelFormat, unsigned wd, unsigned ht, unsigned dp, unsigned lv = 0);
+
+ /** Replaces contents of an entire mipmap level. Allocated storage must
+ exist. The image data is interpreted according to the storage format and
+ must have size matching the selected mipmap level. */
+ void image(unsigned level, const void *);
+
+ /** Replaces a cuboid-shaped region of the texture. Allocated storage must
+ exist. The image data is interpreted according to the storage format and
+ the region must be fully inside the texture. */
+ void sub_image(unsigned level, unsigned x, unsigned y, unsigned z, unsigned wd, unsigned ht, unsigned dp, const void *);
+
+ /** Sets the texture's contents from an image. The image is treated as a
+ stack of square layers and its height must be divisible by its width. If
+ storage has not been allocated yet, it will be set to match the image.
+ Otherwise the image must be compatible with the existing storage. */
virtual void image(const Graphics::Image &, unsigned = 0);
unsigned get_width() const { return width; }
unsigned get_height() const { return height; }
unsigned get_depth() const { return depth; }
protected:
- unsigned get_n_levels() const;
LinAl::Vector<unsigned, 3> get_level_size(unsigned) const;
-
-public:
- virtual AsyncLoader *load(IO::Seekable &, const Resources * = 0) { return 0; }
- virtual std::size_t get_data_size() const;
- virtual void unload() { }
};
} // namespace GL