Add support for padding in vertex formats

[libs/gl.git] / source / backends / opengl / texture3d_backend.cpp

diff --git a/source/backends/opengl/texture3d_backend.cpp b/source/backends/opengl/texture3d_backend.cpp
index 0796472a041de543d67239591928d393fbc97678..961dd7e721766596f439312c45d11348e4eaebc7 100644 (file)
--- 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