- void image(int, int, sizei, sizei, int, GLenum, GLenum, void *);
- void image(int, sizei, sizei, TextureFormat, void *);
- void image(const std::string &);
+
+ /** Defines storage structure for the texture. 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);
+
+ /** Allocates storage for the texture. The contents are initially
+ undefined. If storage has already been allocated, does nothing. */
+ void allocate(unsigned level);
+
+ /** Uploads an image to the texture. Storage must be defined beforehand.
+ The image data must have dimensions and format compatible with the defined
+ storage. */
+ void image(unsigned level, PixelFormat fmt, DataType type, const void *data);
+
+ /** Updates a rectangular region of the texture. Storage must be defined
+ and allocated beforehand. The update region must be fully inside the
+ texture. */
+ void sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht,
+ PixelFormat fmt, DataType type, const void *data);
+
+ /** Loads an image from a file and uploads it to the texture. If storage
+ has not been defined, it will be set to match the loaded image. Otherwise
+ the image must be compatible with the defined storage. */
+ void load_image(const std::string &fn);
+
+ /** Uploads an image to the texture. If storage has not been defined, it
+ will be set to match the image. Otherwise the image must be compatible with
+ the defined storage. */
+ void image(const Graphics::Image &);
+
+ unsigned get_width() const { return width; }
+ unsigned get_height() const { return height; }
+