Changing `IDWriteTextLayout`'s text in DirectWrite

Question

I used IDWriteTextLayout to render text on a Direct2D application instead of direct use of DrawTextW().

I have many benefits of using DirectWrite text layout, e.g determining text boundaries before drawn to the screen.

The problem is, whenever I need to change the text, I need to recreate the text layout. Is there any alternative to this?

In some case, I need to change text every miliseconds, which may result recreating text layouts for every WM_PAINT.

Answer 1

I need to change text every miliseconds

In your case it seems better to use DrawText (like when FPS is displayed for example)

As you said and from MSDN : Text Formatting and Layout

The text in an IDWriteTextLayout object cannot be changed once the object is created. To change the text you must delete the existing object and create a new IDWriteTextLayout object.