Add support for padding in vertex formats

[libs/gl.git] / source / backends / opengl / texturecube_backend.cpp

diff --git a/source/backends/opengl/texturecube_backend.cpp b/source/backends/opengl/texturecube_backend.cpp
index 2b9e09a9c90ecb9a0f27ce48b37e1b9ae747de97..1cc3f8377f23eaf3027d8e54caeb58f83dbefd7b 100644 (file)
--- a/source/backends/opengl/texturecube_backend.cpp
+++ b/source/backends/opengl/texturecube_backend.cpp
@@ -77,8 +77,17 @@ void OpenGLTextureCube::sub_image(unsigned face, unsigned level, int x, int y, u
 
 size_t OpenGLTextureCube::get_data_size() const
 {
+       if(!id)
+               return 0;
+
        unsigned size = static_cast<const TextureCube *>(this)->size;
-       return id ? size*size*6*get_pixel_size(storage_fmt) : 0;
+       unsigned levels = static_cast<const TextureCube *>(this)->levels;
+
+       size_t level_size = size*size*get_pixel_size(storage_fmt);
+       size_t total_size = level_size;
+       for(unsigned i=0; i<levels; ++i, level_size>>=2)
+               total_size += level_size;
+       return total_size;
 }