Add compatibility support for slope-based animation interpolation

[libs/gl.git] / source / texture3d.h

diff --git a/source/texture3d.h b/source/texture3d.h
index 75ae0fe902acb1eb8974591df86b67c9505e5fb3..437c852ab92f943ed569de54eb4c61f6b34402bf 100644 (file)
--- a/source/texture3d.h
+++ b/source/texture3d.h
@@ -27,18 +27,23 @@ public:
        };
 
 private:
-       PixelFormat ifmt;
        unsigned width;
        unsigned height;
        unsigned depth;
+       unsigned levels;
        unsigned allocated;
 
+protected:
+       Texture3D(GLenum);
 public:
        Texture3D();
 
-       /** 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, unsigned dp);
+       /** 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);
 
        /** Allocates storage for the texture.  The contents are initially
        undefined.  If storage has already been allocated, does nothing. */
@@ -82,8 +87,9 @@ public:
        unsigned get_width() const { return width; }
        unsigned get_height() const { return height; }
        unsigned get_depth() const { return depth; }
-private:
-       void get_level_size(unsigned, unsigned &, unsigned &, unsigned &);
+protected:
+       unsigned get_n_levels() const;
+       void get_level_size(unsigned, unsigned &, unsigned &, unsigned &) const;
 
 public:
        virtual AsyncLoader *load(IO::Seekable &, const Resources * = 0) { return 0; }