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Add unicode art pictures for panning.

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Matthias Hopf 2008-12-08 14:40:07 +01:00
parent 19a851fc85
commit e71912062f
1 changed files with 38 additions and 3 deletions
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41
randrproto.txt
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@ -120,7 +120,10 @@ following features are added in this version:
support made it trivial to add full projective transformations. These
can be used to scale the screen up/down as well as perform projector
keystone correct or other effects.
• Panning. It was removed with RandR 1.2 because the old semantics didn't
fit any longer. With RandR 1.3 panning can be specified per crtc.
1.1 Acknowledgements
Our thanks to the contributors to the design found on the xpert mailing
@ -1116,6 +1119,16 @@ dynamic changes in the display environment.
successfully set, the request is ignored and InvalidTime returned in
status.
┌──┳━━━━━━━━━━━━━━┳─────┬ ─ ─ ─ ─ ─ ┐
│ ┃ CRTC ┃ │
│ ┃ ┃ │ │
│ ┃ X┃→ │
│ ┃ ┃ │ │ framebuffer
│ ┗━━━━━━━━━━━━━━┛ │
│ │ │
│panning area │
└───────────────────────┴ ─ ─ ─ ─ ─ ┘
'left', 'top', 'width', and 'height' contain the total panning area
for this CRTC. 'width' has to be larger than or equal to the CRTC's
width or 0, and 'left'+'width' must be within the screen size, else a
@ -1126,13 +1139,35 @@ dynamic changes in the display environment.
RRSetScreenSize will silently enable panning if the screen size is
increased. This does not happen if set to 0.
┌────────┳━━━━━━━━━━━━━━┳ ─ ─ ─ ─ ─ ┐
│ ┃ CRTC ┃
│ ┃ ┃ │
│ ┃ ┃
│ ┃ ┃ │ tracking area
│ ┗━━━━━━━━━━━━━━┫ X
│ ↓ │ ↓ │
│panning area │
└───────────────────────┴ ─ ─ ─ ─ ─ ┘
'track_left', 'track_top', 'track_width', and 'track_height' contain
the pointer area for which the panning region is updated. For normal
use cases it should enclose the panning area minus borders, and is
typically set to either the panning area minus borders, or to the
total screen size. If set to the total screen size, the CRTC will pan
in the remaining axis even if the pointer is outside the panning area
on a different CRTC.
on a different CRTC, as shown in the figure above. If the pointer is
outside the tracking area, the CRTC will not pan.
┌──┳━━━━━━━━━━━━━━┳────────────┐
│ ┃ CRTC ┃ │
│ ┃ ┃ │
│ ┃ ┃→ │
│ ┃ X←→┃ │
│ ┃ border_right │
│ ┗━━━━━━━━━━━━━━┛ │
│ │
│panning area │
└──────────────────────────────┘
'border_left', 'border_top', 'border_right', and 'border_bottom'
define the distances from the CRTC borders that will activate panning
@ -1140,7 +1175,7 @@ dynamic changes in the display environment.
when the pointer hits the CRTC borders (behavior of pre-RandR Xserver
panning). If the borders are positive, the screen will pan when the
pointer gets close to the CRTC borders, if they are negative, the
screen will only pan when the pointer is already way past the CRTC
screen will only pan when the pointer is already way past the CRTC
borders. Negative values might confuse users and disable panning to
the very edges of the screen. Thus they are discouraged.
border_left + border_right has to be lower or equal than the CRTC's