Added some TODOs related to buffer storage.

src/Magnum/AbstractFramebuffer.h

@@ -314,6 +314,8 @@ class MAGNUM_EXPORT AbstractFramebuffer {
          * See @ref read(const Vector2i&, const Vector2i&, Image2D&) for more
          * information.
          * @requires_gles30 Pixel buffer objects are not available in OpenGL ES 2.0.
+         * @todo Make it more flexible (usable with
+         *      @extension{ARB,buffer_storage}, avoiding relocations...)
          */
         void read(const Vector2i& offset, const Vector2i& size, BufferImage2D& image, BufferUsage usage);
         #endif

src/Magnum/BufferImage.h

@@ -61,6 +61,8 @@ template<UnsignedInt dimensions> class BufferImage: public AbstractImage {
          *
          * Note that the image data are not copied on construction, but they
          * are deleted on class destruction.
+         * @todo Make it more flexible (usable with
+         *      @extension{ARB,buffer_storage}, avoiding relocations...)
          */
         explicit BufferImage(ColorFormat format, ColorType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, const void* data, BufferUsage usage);
 
@@ -108,6 +110,8 @@ template<UnsignedInt dimensions> class BufferImage: public AbstractImage {
          * Updates the image buffer with given data. The data are not deleted
          * after filling the buffer.
          * @see @ref Buffer::setData()
+         * @todo Make it more flexible (usable with
+         *      @extension{ARB,buffer_storage}, avoiding relocations...)
          */
         void setData(ColorFormat format, ColorType type, const typename DimensionTraits<Dimensions, Int>::VectorType& size, const void* data, BufferUsage usage);
 

src/Magnum/Texture.h

@@ -606,6 +606,8 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          *
          * See @ref image(Int, Image&) for more information.
          * @requires_gl %Texture image queries are not available in OpenGL ES.
+         * @todo Make it more flexible (usable with
+         *      @extension{ARB,buffer_storage}, avoiding relocations...)
          */
         void image(Int level, BufferImage<dimensions>& image, BufferUsage usage) {
             AbstractTexture::image<dimensions>(_target, level, image, usage);