diff options
Diffstat (limited to 'randrproto.txt')
| -rw-r--r-- | randrproto.txt | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/randrproto.txt b/randrproto.txt index f700a84..e15a798 100644 --- a/randrproto.txt +++ b/randrproto.txt @@ -131,8 +131,7 @@ underlying hardware to clients • Per-crtc pixmaps. This provides for multiple scan-out buffers which applications can create and assign to arbitrary collections - of crtcs. These pixmaps can be associated with a window for use - with OpenGL or drawn to directly. + of crtcs. • Sprite position and image transforms. These provide a projective transform for both the hot spot location and the sprite image @@ -356,6 +355,22 @@ SCANOUTPIXMAPINFO { format: PICTFORMAT maxWidth, maxHeight: CARD16 rotations: SETofROTATION } + 'format' is the format of the pixels within the scanout + pixmap. Only 'Direct' formats are supported, this will never + be an 'Indexed' format. + + 'maxWidth' and 'maxHeight' define the largest supported + scanout pixmap. There is no minimum size; scanout pixmaps down + to 1x1 may be created. + + 'rotations' lists the set of rotations which can be provided + without additional latency or memory usage within the + environment. This typically means that they are supported + directly by the hardware. It is expected that a compositing + manager will perform other transforms as a part of the + compositing process in conjunction with the sprite transforms + described in this extension. + CRTCCONFIG { crtc: CRTC x, y: INT16 mode: MODE @@ -363,7 +378,7 @@ CRTCCONFIG { crtc: CRTC sprite-position-transform: TRANSFORM sprite-image-transform: TRANSFORM outputs: LISTofOUTPUT - pixmap: PIXMAP, None or CurrenScanoutPixmap + pixmap: PIXMAP, None or CurrentScanoutPixmap pixmap-x, pixmap-y: INT16 } The sprite-position-transform and sprite-image-transform @@ -373,7 +388,7 @@ CRTCCONFIG { crtc: CRTC 'pixmap' specifies the origin of the pixel data to be presented on 'crtc'. If 'pixmap' is None, then data will be presented from the screen pixmap. If 'pixmap' is 'CurrentScanoutPixmap', then - whatever source is current in use will remain in use, whether + whatever source is currently in use will remain in use, whether that is the screen pixmap or some other allocated scanout pixmap. 'pixmap-x' and 'pixmap-y' specify the origin of the scanout |