+ unsigned width;
+ unsigned height;
+ unsigned allocated;
+
+public:
+ Texture2D(ResourceManager * = 0);
+ virtual ~Texture2D();
+
+ /** 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 a Graphics::Image from a file and uploads it to the texture.
+ void load_image(const std::string &fn, bool srgb = false);
+
+ /** 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.
+
+ If srgb is true and storage is determined by this call, then an sRGB pixel
+ format will be used. */
+ void image(const Graphics::Image &, bool srgb = false);
+
+private:
+ void image(const Graphics::Image &, bool, bool);
+
+public:
+ unsigned get_width() const { return width; }
+ unsigned get_height() const { return height; }
+
+private:
+ void get_level_size(unsigned, unsigned &, unsigned &);