Lines Matching +full:dma +full:- +full:channel +full:- +full:mask

1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
11 Video overlay devices have the ability to genlock (TV-)video into the
12 (VGA-)video signal of a graphics card, or to store captured images
43 advantage of memory mapping and DMA.
62 :ref:`streaming parameter <streaming-par>` ioctls as needed. The
77 privileged because it allows to set up DMA into physical memory,
93 1. Chroma-keying displays the overlaid image only where pixels in the
105 4. The framebuffer has an alpha channel that can be used to clip or
162 ------------------
181     When chroma-keying has been negotiated with
187     :ref:`V4L2_PIX_FMT_BGR24 <V4L2-PIX-FMT-BGR32>` the value should
192     When chroma-keying has *not* been negotiated and
202     x-y or y-x bands, or the order of rectangles, is not defined. When
217     When chroma-keying has *not* been negotiated and
219     applications can set this field to point to a clipping bit mask.
227 .. code-block:: c
233 When a clipping bit mask is not supported the driver ignores this field,
235 undefined. When a bit mask is supported but no clipping is desired this
238 Applications need not create a clip list or bit mask. When they pass
239 both, or despite negotiating chroma-keying, the results are undefined.
249     :ref:`framebuffer-flags`).
262 -----------------------
278 ----------------
310    Hence as a complexity trade-off drivers *must* support two file
325    BoxRec { short x1, y1, x2, y2; }`` with ``width = x2 - x1`` and
326    ``height = y2 - y1``, so one cannot pass X11 clip lists directly.