Make Animation::Iterator assignable

[libs/gl.git] / source / texturecube.h

diff --git a/source/texturecube.h b/source/texturecube.h
index b15c1cff2af5fcff564d6f70e754b0282d4ff4fe..ea1c8296190ade9703121238771c9277baba3d04 100644 (file)
--- a/source/texturecube.h
+++ b/source/texturecube.h
@@ -1,9 +1,10 @@
 #ifndef MSP_GL_TEXTURECUBE_H_
 #define MSP_GL_TEXTURECUBE_H_
 
-#include "datatype.h"
-#include "pixelformat.h"
+#include <msp/gl/extensions/arb_texture_cube_map.h>
+#include <msp/graphics/image.h>
 #include "texture.h"
+#include "vector.h"
 
 namespace Msp {
 namespace GL {
@@ -23,7 +24,8 @@ 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.
+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.
 
@@ -31,11 +33,29 @@ 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 external_image(TextureCubeFace, const std::string &);
+               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 TextureCubeFace face_order[6];
+       static Vector3 directions[6];
+       static unsigned orientations[12];
+
 public:
        TextureCube();
 
@@ -60,11 +80,41 @@ public:
                int x, int y, unsigned w, unsigned h,
                PixelFormat fmt, DataType type, const void *data);
 
+       void image(TextureCubeFace, const Graphics::Image &, bool = false);
+
+       virtual void image(const Graphics::Image &, bool = false);
+
        unsigned get_size() const { return size; }
 private:
-       unsigned get_level_size(unsigned);
+       unsigned get_n_levels() const;
+       unsigned get_level_size(unsigned) const;
+
+public:
+       /** Translates indices into face constants.  Valid indices are between 0
+       and 5, inclusive. */
+       static TextureCubeFace enumerate_faces(unsigned);
+
+       static unsigned get_face_index(TextureCubeFace);
+
+       /** 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