X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fbackends%2Fopengl%2Ftexture3d_backend.cpp;h=961dd7e721766596f439312c45d11348e4eaebc7;hb=e2a707feb62c5df69884cca34d099dd2f7b7e4e2;hp=0796472a041de543d67239591928d393fbc97678;hpb=2b930a353df652ade5baacae21d5d8a01f37c09d;p=libs%2Fgl.git

diff --git a/source/backends/opengl/texture3d_backend.cpp b/source/backends/opengl/texture3d_backend.cpp
index 0796472a..961dd7e7 100644
--- a/source/backends/opengl/texture3d_backend.cpp
+++ b/source/backends/opengl/texture3d_backend.cpp
@@ -76,10 +76,19 @@ bool OpenGLTexture3D::is_array() const
 
 size_t OpenGLTexture3D::get_data_size() const
 {
+	if(!id)
+		return 0;
+
 	unsigned width = static_cast<const Texture3D *>(this)->width;
 	unsigned height = static_cast<const Texture3D *>(this)->height;
 	unsigned depth = static_cast<const Texture3D *>(this)->depth;
-	return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
+	unsigned levels = static_cast<const Texture3D *>(this)->levels;
+
+	size_t level_size = width*height*depth*get_pixel_size(format);
+	size_t total_size = level_size;
+	for(unsigned i=0; i<levels; ++i, level_size>>=2)
+		total_size += level_size;
+	return total_size;
 }
 
 } // namespace GL