[mutter/wip/garnacho/wayland-emulated-output-transform: 12/13] backends/native: Expose all transform modes in CRTCs

[Carlos Garnacho <carlosg src gnome org>]

commit ec456d630685dd989cf9d06772656c7c7eb7b724
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Aug 1 03:51:36 2016 +0200

    backends/native: Expose all transform modes in CRTCs
    
    We can only honor this properly in the MUTTER_STAGE_VIEWS=1 case. When using
    the legacy view, software implemented transforms are only exposed if there is
    only one output, as we can only transform the entire stage there.

 src/backends/native/meta-monitor-manager-kms.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/src/backends/native/meta-monitor-manager-kms.c b/src/backends/native/meta-monitor-manager-kms.c
index 2c30bbe..922b4c9 100644
--- a/src/backends/native/meta-monitor-manager-kms.c
+++ b/src/backends/native/meta-monitor-manager-kms.c
@@ -46,6 +46,7 @@
 #include <gudev/gudev.h>
 
 #define ALL_TRANSFORMS (META_MONITOR_TRANSFORM_FLIPPED_270 + 1)
+#define ALL_TRANSFORMS_MASK ((1 << ALL_TRANSFORMS) - 1)
 
 typedef struct {
   drmModeConnector *connector;
@@ -687,8 +688,7 @@ meta_monitor_manager_kms_read_current (MetaMonitorManager *manager)
       meta_crtc->rect.height = crtc->height;
       meta_crtc->is_dirty = FALSE;
       meta_crtc->transform = META_MONITOR_TRANSFORM_NORMAL;
-      /* FIXME: implement! */
-      meta_crtc->all_transforms = 1 << META_MONITOR_TRANSFORM_NORMAL;
+      meta_crtc->all_transforms = ALL_TRANSFORMS_MASK;
 
       if (crtc->mode_valid)
         {
@@ -952,6 +952,13 @@ meta_monitor_manager_kms_read_current (MetaMonitorManager *manager)
       MetaCRTC *meta_crtc = &manager->crtcs[i];
       MetaCRTCKms *crtc_kms = meta_crtc->driver_private;
 
+      /* If we have no stage views, we only allow sw rotation
+       * if there is only one output, thus the whole stage
+       * can be rotated.
+       */
+      if (!meta_is_stage_views_enabled () && manager->n_outputs > 1)
+        meta_crtc->all_transforms = META_MONITOR_TRANSFORM_NORMAL;
+
       meta_crtc->all_transforms |= crtc_kms->all_hw_transforms;
     }