-#ifndef MSP_GL_TEXTURECUBE_H_
-#define MSP_GL_TEXTURECUBE_H_
-
-#include <msp/graphics/image.h>
-#include "texture.h"
-#include "vector.h"
-#include <msp/gl/extensions/arb_texture_cube_map.h>
-
-namespace Msp {
-namespace GL {
-
-enum TextureCubeFace
-{
- POSITIVE_X = GL_TEXTURE_CUBE_MAP_POSITIVE_X,
- NEGATIVE_X = GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
- POSITIVE_Y = GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
- NEGATIVE_Y = GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
- POSITIVE_Z = GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
- NEGATIVE_Z = GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
-};
-
-/**
-Cube map texture, consisting of six square faces. All of the faces must be of
-the same size. A cube map texture is addressed by three-dimensional texture
-coordinates, with a principal range of [-1, 1]. The face is first selected
-according to the largest coordinate, and the remaining two coordinates are used
-to sample the face image. The images are oriented so that the cross product of
-the s and t axes will point into the cube.
-
-All faces of a cube map texture must be allocated for it to be usable.
-
-Requires OpenGL version 1.3.
-*/
-class TextureCube: public Texture
-{
-public:
- class Loader: public Msp::DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>
- {
- public:
- Loader(TextureCube &);
- Loader(TextureCube &, Collection &);
- private:
- void init();
-
- void image_data(TextureCubeFace, const std::string &);
- void raw_data(TextureCubeFace, const std::string &);
- void storage(PixelFormat, unsigned);
- };
-
-private:
- PixelFormat ifmt;
- unsigned size;
- unsigned allocated;
-
- static Vector3 directions[6];
-
-public:
- TextureCube();
-
- /** 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 size);
-
- /** Allocates storage for the cube faces. The contents are initially
- undefined. If storage has already been allocated, does nothing. */
- void allocate(unsigned level);
-
- /** Uploads image data to a face. Storage must be defined beforehand. The
- image data must have dimensions and format compatible with the defined
- storage. */
- void image(TextureCubeFace face, unsigned level,
- PixelFormat fmt, DataType type, const void *data);
-
- /** Updates a rectangular region of a face. Storage must be defined and
- allocated beforehand. The update region must be fully inside the texture.
- The data format must be compatible with the defined storage. */
- void sub_image(TextureCubeFace face, unsigned level,
- int x, int y, unsigned w, unsigned h,
- PixelFormat fmt, DataType type, const void *data);
-
- void image(TextureCubeFace, const Graphics::Image &, bool = false);
-
- unsigned get_size() const { return size; }
-private:
- unsigned get_level_size(unsigned);
-
-public:
- /** Translates indices into face constants. Valid indices are between 0
- and 5, inclusive. */
- static TextureCubeFace enumerate_faces(unsigned);
-
- /** Returns a vector pointing out of the face. */
- static const Vector3 &get_face_direction(TextureCubeFace);
-
- /** Returns a vector in the direction of the s axis of the face. */
- static const Vector3 &get_s_direction(TextureCubeFace);
-
- /** Returns a vector in the direction of the t axis of the face. */
- static const Vector3 &get_t_direction(TextureCubeFace);
-
- /** Returns a vector pointing to the center a texel. */
- Vector3 get_texel_direction(TextureCubeFace, unsigned, unsigned);
-
- virtual AsyncLoader *load(IO::Seekable &, const Resources * = 0) { return 0; }
- virtual UInt64 get_data_size() const;
- virtual void unload() { }
-};
-
-void operator>>(const LexicalConverter &, TextureCubeFace &);
-
-} // namespace GL
-} // namespace Msp
-
-#endif