Add some utility functions for textures

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

diff --git a/source/texturecube.cpp b/source/texturecube.cpp
index 26402695880dc12eba847ccb443fa8cb90fbb02c..65b1845eaf9ca5f1bb82f9886ada4ed0eed46472 100644 (file)
--- a/source/texturecube.cpp
+++ b/source/texturecube.cpp
@@ -75,8 +75,7 @@ void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, D
        {
                // TODO Only do this once all faces are created
                auto_generate_mipmap();
-               for(; s; s>>=1, ++level) ;
-               allocated |= (1<<level)-1;
+               allocated |= (1<<get_n_levels())-1;
        }
 }
 
@@ -136,7 +135,14 @@ void TextureCube::image(const Graphics::Image &img, bool srgb)
                image(enumerate_faces(i), 0, fmt, UNSIGNED_BYTE, cdata+i*face_size);
 }
 
-unsigned TextureCube::get_level_size(unsigned level)
+unsigned TextureCube::get_n_levels() const
+{
+       unsigned n = 0;
+       for(unsigned s=size; s; s>>=1, ++n) ;
+       return n;
+}
+
+unsigned TextureCube::get_level_size(unsigned level) const
 {
        return size>>level;
 }