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Screen
======
A screen is an object representing the context-independent part of a device.
Useful Flags
------------
PIPE_TEXTURE_USAGE
^^^^^^^^^^^^^^^^^^
These flags determine the possible roles a texture may be used for during its
lifetime. Texture usage flags are cumulative and may be combined to create a
texture that can be used as multiple things.
* ``RENDER_TARGET``: A colorbuffer or pixelbuffer.
* ``DISPLAY_TARGET``: A sharable buffer that can be given to another process.
* ``PRIMARY``: A frontbuffer or scanout buffer.
* ``DEPTH_STENCIL``: A depthbuffer, stencilbuffer, or Z buffer. Gallium does
not explicitly provide for stencil-only buffers, so any stencilbuffer
validated here is implicitly also a depthbuffer.
* ``SAMPLER``: A texture that may be sampled from in a fragment or vertex
shader.
* ``DYNAMIC``: XXX undefined
Methods
-------
XXX moar; got bored
get_name
^^^^^^^^
Returns an identifying name for the screen.
get_vendor
^^^^^^^^^^
Returns the screen vendor.
get_param
^^^^^^^^^
Get an integer/boolean screen parameter.
get_paramf
^^^^^^^^^^
Get a floating-point screen parameter.
is_format_supported
^^^^^^^^^^^^^^^^^^^
See if a format can be used in a specific manner.
**usage** is a bitmask of ``PIPE_TEXTURE_USAGE`` flags.
Returns TRUE if all usages can be satisfied.
texture_create
^^^^^^^^^^^^^^
Given a template of texture setup, create a BO-backed texture.
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