diff options
Diffstat (limited to 'randrproto.txt')
| -rw-r--r-- | randrproto.txt | 92 |
1 files changed, 74 insertions, 18 deletions
diff --git a/randrproto.txt b/randrproto.txt index 6719cf8..8d21160 100644 --- a/randrproto.txt +++ b/randrproto.txt @@ -1,6 +1,6 @@ The X Resize, Rotate and Reflect Extension - Version 1.2 - 2006-4-13 + Version 1.3 + 2006-20-7 Jim Gettys Jim.Gettys@hp.com @@ -110,6 +110,13 @@ bandwidth for large resolution screens. This is exposed in RandR by requiring that nothing be connected to the second CRTC when driving a high resolution screen on the first. +1.3 Introduction to version 1.3 of the extension + +Version 1.3 builds on the changes made with version 1.2 and adds some new +capabilities without fundmentally changing the extension again. This version +adds 'panning regions' and projective transforms, plus defines some standard +output properties to help clients describe the systme more accurately. + 1.1 Acknowledgements Our thanks to the contributors to the design found on the xpert mailing @@ -846,8 +853,10 @@ dynamic changes in the display environment. 'x' and 'y' indicate the position of this CRTC within the screen region. They will be set to 0 when the CRTC is disabled. - 'width' and 'height' indicate the size of the area presented by this - CRTC. + 'width' and 'height' indicate the size of the area within the screen + presented by this CRTC. This may be different than the size of the + mode due to rotation. They will be set to 0 when the CRTC is + disabled. 'mode' indicates which mode is active, or None indicating that the CRTC has been disabled and is not displaying the screen contents. @@ -968,6 +977,47 @@ dynamic changes in the display environment. must be the size returned by RRGetCrtcGammaSize else a Value error results. +7.2. Extension Requests added in version 1.3 of the extension + +┌─── + RRSetCrtcTransform + crtc: CRTC + transform: TRANSFORM + inverse: TRANSFORM +└─── + Errors: Crtc, Match + +This request provides a mechanism that is more general than the existing +rotation and reflection values for describing the transformation from frame +buffer image to crtc presentation. 'transform' is a full 2D projective +transformations from screen coordinate space to crtc coordinate space. This +transformation is applied before the rotation and reflection values to +compute the complete transform. 'inverse' must be the +multiplicative inverse of 'transform' or a Match error results. + +This request sets the transform to be used at the next RRSetCrtcConfig +request execution; it does not cause any change to occur in the current +configuration. + +When a non-identity transformation is in use, the rectangle returned by +RRGetCrtcInfo defines the bounding rectangle of the screen that is projected +to the crtc. It is this projected rectangle which must be within the area of +the screen when the mode is set. + +┌─── + RRGetCrtcTransform + crtc: CRTC + ▶ + pending-transform: TRANSFORM + pending-inverse: TRANSFORM + current-transform: TRANSFORM + current-inverse: TRANSFORM +└─── + +This request returns the pending and current transforms for the specified +CRTC. The pending transform will be the same as the current transform if no +new pending transform has been set since the last call to RRSetCrtcConfig. + ❧❧❧❧❧❧❧❧❧❧❧ 8. Extension Events @@ -990,12 +1040,12 @@ factors, such as re-cabling a monitor, etc. configTimestamp: TIMESTAMP time config data was changed root: WINDOW root window of screen window: WINDOW window requesting notification - size-id: SIZEID index of new size + size-id: SIZEID index of new SCREENSIZE subpixelOrder: SUBPIXELORDER order of subpixels - widthInPixels: CARD16 - heightInPixels: CARD16 - widthInMillimeters: CARD16 - heightInMillimeters: CARD16 + widthInPixels: CARD16 width in pixels of the new SCREENSIZE + heightInPixels: CARD16 height in pixels of the new SCREENSIZE + widthInMillimeters: CARD16 width in mm of the new SCREENSIZE + heightInMillimeters: CARD16 height in mm of the new SCREENSIZE └─── This event is generated whenever the screen configuration is changed and sent to requesting clients. 'timestamp' indicates when the @@ -1021,6 +1071,13 @@ factors, such as re-cabling a monitor, etc. just at the time when a display manager or log in script might be changing the screen size or configuration. + Note that the sizes in this event reflect the new SCREENSIZE and + thus will appear rotated by the 'rotation' parameter from the sizes + of the screen itself. In other words, when rotation is 90 or 270, + widthInPixels in this event will be the same as the height value + from a ConfigureNotify that reflects the same size change. This + will probably confuse developers. + 8.1 Events added in version 1.2 of the RandR extension ┌─── @@ -1065,27 +1122,26 @@ factors, such as re-cabling a monitor, etc. ┌─── RRCrtcChangeNotify timestamp: TIMESTAMP time monitor was changed - config-timestamp: TIMESTAMP time config data was changed - root: WINDOW root window of screen window: WINDOW window requesting notification crtc: CRTC CRTC which changed mode: MODE new mode rotation: ROTATION; new rotation x: INT16 x position of CRTC within screen y: INT16 y position of CRTC within screen + width: CARD16 width of new mode + height: CARD16 height of new mode └─── This event is generated whenever the CRTC configuration is changed and sent to requesting clients. 'timestamp' indicates when the - CRTC configuration was changed. 'config-timestamp' says when the - last time the configuration was changed. 'root' is the root of the - screen the change occurred on, 'window' is window selecting for this - event. + CRTC configuration was changed. 'window' is window selecting for this + event. 'mode' is the new mode, or None if the crtc is disabled. + 'x' and 'y' mark the location in the screen where this CRTC + is reading data. 'width' and 'height' indicate the size of the + mode. 'x', 'y, 'width' and 'height' are all zero when 'mode' is None. This event is sent whenever the monitor's configuration changes or if a new monitor configuration becomes available that was - not available in the past. In this case (config-timestamp in - the event not being equal to the config-timestamp returned in - the last call to RRGetCrtcModes), the client MUST call + not available in the past. In this case, the client MUST call RRGetCrtcModes to update its view of possible monitor configurations to have a correct view of possible monitor organizations. |