Add unicode art pictures for panning.

1 files changed, 38 insertions, 3 deletions

diff --git a/randrproto.txt b/randrproto.txt
index 5244379..65b122d 100644
--- a/randrproto.txt
+++ b/randrproto.txt
@@ -122,3 +122,6 @@ following features are added in this version:
      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
@@ -1118,2 +1121,12 @@ dynamic changes in the display environment.
 
+	┌──┳━━━━━━━━━━━━━━┳─────┬ ─ ─ ─ ─ ─ ┐
+	│  ┃     CRTC     ┃     │
+	│  ┃              ┃     │           │
+	│  ┃             X┃→    │
+	│  ┃              ┃     │           │  framebuffer
+	│  ┗━━━━━━━━━━━━━━┛     │
+	│                       │           │
+	│panning area           │
+	└───────────────────────┴ ─ ─ ─ ─ ─ ┘
+
 	'left', 'top', 'width', and 'height' contain the total panning area
@@ -1128,2 +1141,12 @@ dynamic changes in the display environment.
 
+	┌────────┳━━━━━━━━━━━━━━┳ ─ ─ ─ ─ ─ ┐
+	│        ┃     CRTC     ┃
+	│        ┃              ┃           │
+	│        ┃              ┃
+	│        ┃              ┃           │  tracking area
+	│        ┗━━━━━━━━━━━━━━┫     X
+	│               ↓       │     ↓     │
+	│panning area           │
+	└───────────────────────┴ ─ ─ ─ ─ ─ ┘
+
 	'track_left', 'track_top', 'track_width', and 'track_height' contain
@@ -1134,3 +1157,15 @@ dynamic changes in the display environment.
 	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                  │
+	└──────────────────────────────┘
 
@@ -1142,3 +1177,3 @@ dynamic changes in the display environment.
 	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