Does anyone have a plan for how to represent Renderables (or
SceneElement) that don't have a buffer()? I'm thinking about dynamically
generated elements that don't have buffer streams and are not fixed
resolution. Such elements are either pre-generated (once) or even
produced entirely on the GPU as a shader program.
The first example is the title bar in demo-shell. It's made of a single
texture that is mip-mapped, repeated, reflected, scaled and filtered
dynamically according to the window size (and eventually according to
display DPI too).
A second example is a software cursor or touchspots that you might want
to generate at hi-DPI and then mipmap/scale according to which display
it's on.
The obvious answer (maybe) is that a Renderable (or SceneElement
whatever) needs to provide its own draw function in the case that there
is no buffer(). That might also nicely solve the problem of "is there
anything on screen that can't be overlayed?" -- "yes because one or more
visible renderables don't provide a buffer() but instead only provide a
gl_render()".
A second possible solution is to just define enum RenderType {buffer,
titlebar, fixed_texture, otherthings} and leave it up to the
Compositor/Renderer to implement all the types.
- Daniel
--
Mir-devel mailing list
Mir-devel@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/mir-devel
