X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fbackends%2Fopengl%2Ftexture1d_backend.cpp;h=b8424872b37c3ee960801bfda52eddd4f4185611;hb=e70662d7812464159f2e47f4bebb69d88f89ae93;hp=e44ceb4e757d6efefc4b54414d396894d8a9f019;hpb=160e9eea29bd10034733d59507fa1bcca36be401;p=libs%2Fgl.git

diff --git a/source/backends/opengl/texture1d_backend.cpp b/source/backends/opengl/texture1d_backend.cpp
index e44ceb4e..b8424872 100644
--- a/source/backends/opengl/texture1d_backend.cpp
+++ b/source/backends/opengl/texture1d_backend.cpp
@@ -19,6 +19,9 @@ void OpenGLTexture1D::allocate()
 	unsigned width = static_cast<const Texture1D *>(this)->width;
 	unsigned levels = static_cast<const Texture1D *>(this)->levels;
 
+	if(!id)
+		create();
+
 	GLenum gl_fmt = get_gl_pixelformat(storage_fmt);
 	if(ARB_texture_storage)
 	{
@@ -59,5 +62,20 @@ void OpenGLTexture1D::sub_image(unsigned level, int x, unsigned wd, const void *
 	}
 }
 
+size_t OpenGLTexture1D::get_data_size() const
+{
+	if(!id)
+		return 0;
+
+	unsigned width = static_cast<const Texture1D *>(this)->width;
+	unsigned levels = static_cast<const Texture1D *>(this)->levels;
+
+	size_t level_size = width*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;
+}
+
 } // namespace GL
 } // namespace Msp