[mutter] backends/cursor: Add API to set and get the texture buffer transform

[Jonas Ådahl <jadahl src gnome org>]

commit 1fc79358584bd847c94f516a0203bef8f2098d0e
Author: Robert Mader <robert mader posteo de>
Date:   Mon Apr 8 18:12:23 2019 +0200

    backends/cursor: Add API to set and get the texture buffer transform
    
    In Wayland clients can commit transformed surfaces, so the compositor
    can directly use them on hardware planes. We already support that
    for other surfaces, this is the first step to also support it on
    cursor sprites.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/526

 src/backends/meta-cursor.c | 21 +++++++++++++++++++++
 src/backends/meta-cursor.h |  6 ++++++
 2 files changed, 27 insertions(+)
---
diff --git a/src/backends/meta-cursor.c b/src/backends/meta-cursor.c
index 8fd6a9cb1..d4087a67f 100644
--- a/src/backends/meta-cursor.c
+++ b/src/backends/meta-cursor.c
@@ -43,6 +43,7 @@ typedef struct _MetaCursorSpritePrivate
 
   CoglTexture2D *texture;
   float texture_scale;
+  MetaMonitorTransform texture_transform;
   int hot_x, hot_y;
 } MetaCursorSpritePrivate;
 
@@ -110,6 +111,16 @@ meta_cursor_sprite_set_texture_scale (MetaCursorSprite *sprite,
   priv->texture_scale = scale;
 }
 
+void
+meta_cursor_sprite_set_texture_transform (MetaCursorSprite     *sprite,
+                                          MetaMonitorTransform  transform)
+{
+  MetaCursorSpritePrivate *priv =
+    meta_cursor_sprite_get_instance_private (sprite);
+
+  priv->texture_transform = transform;
+}
+
 CoglTexture *
 meta_cursor_sprite_get_cogl_texture (MetaCursorSprite *sprite)
 {
@@ -140,6 +151,15 @@ meta_cursor_sprite_get_texture_scale (MetaCursorSprite *sprite)
   return priv->texture_scale;
 }
 
+MetaMonitorTransform
+meta_cursor_sprite_get_texture_transform (MetaCursorSprite *sprite)
+{
+  MetaCursorSpritePrivate *priv =
+    meta_cursor_sprite_get_instance_private (sprite);
+
+  return priv->texture_transform;
+}
+
 void
 meta_cursor_sprite_prepare_at (MetaCursorSprite *sprite,
                                int               x,
@@ -164,6 +184,7 @@ meta_cursor_sprite_init (MetaCursorSprite *sprite)
     meta_cursor_sprite_get_instance_private (sprite);
 
   priv->texture_scale = 1.0f;
+  priv->texture_transform = META_MONITOR_TRANSFORM_NORMAL;
 }
 
 static void
diff --git a/src/backends/meta-cursor.h b/src/backends/meta-cursor.h
index ebcb8f6d4..5cac34e46 100644
--- a/src/backends/meta-cursor.h
+++ b/src/backends/meta-cursor.h
@@ -22,6 +22,7 @@
 #ifndef META_CURSOR_H
 #define META_CURSOR_H
 
+#include "backends/meta-backend-types.h"
 #include "meta/common.h"
 #include "meta/boxes.h"
 
@@ -57,6 +58,9 @@ void meta_cursor_sprite_set_texture (MetaCursorSprite *sprite,
 void meta_cursor_sprite_set_texture_scale (MetaCursorSprite *sprite,
                                            float             scale);
 
+void meta_cursor_sprite_set_texture_transform (MetaCursorSprite     *sprite,
+                                               MetaMonitorTransform  transform);
+
 CoglTexture *meta_cursor_sprite_get_cogl_texture (MetaCursorSprite *sprite);
 
 void meta_cursor_sprite_get_hotspot (MetaCursorSprite *sprite,
@@ -65,6 +69,8 @@ void meta_cursor_sprite_get_hotspot (MetaCursorSprite *sprite,
 
 float meta_cursor_sprite_get_texture_scale (MetaCursorSprite *sprite);
 
+MetaMonitorTransform meta_cursor_sprite_get_texture_transform (MetaCursorSprite *sprite);
+
 gboolean meta_cursor_sprite_is_animated (MetaCursorSprite *sprite);
 
 void meta_cursor_sprite_tick_frame (MetaCursorSprite *sprite);