[PATCH] Allow forcing device orientation through configuration file

[Mathieu Alexandre-Tétreault]

From: "Mathieu A.-Tetreault" <alexandretm at amotus.ca>

Signed-off-by: Mathieu A.-Tetreault <alexandretm at amotus.ca>
---
 src/libply/ply-utils.c             | 14 ++++++++++++++
 src/libply/ply-utils.h             |  2 ++
 src/main.c                         | 24 ++++++++++++++++++++++++
 src/plugins/renderers/drm/plugin.c |  2 +-
 4 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/src/libply/ply-utils.c b/src/libply/ply-utils.c
index f90ac40..f172901 100644
--- a/src/libply/ply-utils.c
+++ b/src/libply/ply-utils.c
@@ -81,6 +81,7 @@ static int errno_stack[PLY_ERRNO_STACK_SIZE];
 static int errno_stack_position = 0;
 
 static int overridden_device_scale = 0;
+static int overridden_device_orientation = 0;
 
 static char kernel_command_line[PLY_MAX_COMMAND_LINE_SIZE];
 static bool kernel_command_line_is_set;
@@ -851,6 +852,13 @@ ply_set_device_scale (int device_scale)
     ply_trace ("Device scale is set to %d", device_scale);
 }
 
+void
+ply_set_device_orientation (int device_orientation)
+{
+    overridden_device_orientation = device_orientation;
+    ply_trace ("Device orientation is set to %d", device_orientation);
+}
+
 /* The minimum resolution at which we turn on a device-scale of 2 */
 #define HIDPI_LIMIT 192
 #define HIDPI_MIN_HEIGHT 1200
@@ -897,6 +905,12 @@ ply_get_device_scale (uint32_t width,
         return device_scale;
 }
 
+int
+ply_get_device_orientation (void)
+{
+        return overridden_device_orientation;
+}
+
 static const char *
 ply_get_kernel_command_line (void)
 {
diff --git a/src/libply/ply-utils.h b/src/libply/ply-utils.h
index d7b7622..19e68b3 100644
--- a/src/libply/ply-utils.h
+++ b/src/libply/ply-utils.h
@@ -117,11 +117,13 @@ char *ply_get_process_command_line (pid_t pid);
 pid_t ply_get_process_parent_pid (pid_t pid);
 
 void ply_set_device_scale (int device_scale);
+void ply_set_device_orientation (int device_orientation);
 
 int ply_get_device_scale (uint32_t width,
                           uint32_t height,
                           uint32_t width_mm,
                           uint32_t height_mm);
+int ply_get_device_orientation (void);
 
 const char *ply_kernel_command_line_get_string_after_prefix (const char *prefix);
 bool ply_kernel_command_line_has_argument (const char *argument);
diff --git a/src/main.c b/src/main.c
index 01a7ee2..16ea4a9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -55,6 +55,7 @@
 #include "ply-trigger.h"
 #include "ply-utils.h"
 #include "ply-progress.h"
+#include "ply-pixel-buffer.h"
 
 #define BOOT_DURATION_FILE     PLYMOUTH_TIME_DIRECTORY "/boot-duration"
 #define SHUTDOWN_DURATION_FILE PLYMOUTH_TIME_DIRECTORY "/shutdown-duration"
@@ -263,6 +264,7 @@ load_settings (state_t    *state,
         bool settings_loaded = false;
         char *scale_string = NULL;
         char *splash_string = NULL;
+        char *orientation_string = NULL;
 
         ply_trace ("Trying to load %s", path);
         key_file = ply_key_file_new (path);
@@ -312,6 +314,28 @@ load_settings (state_t    *state,
                 }
         }
 
+        orientation_string = ply_key_file_get_value (key_file, "Daemon", "DeviceOrientation");
+
+        if (orientation_string != NULL) {
+                int orientation = PLY_PIXEL_BUFFER_ROTATE_UPRIGHT;
+
+                if (strcmp (orientation_string, "UpsideDown") == 0)
+                        orientation = PLY_PIXEL_BUFFER_ROTATE_UPSIDE_DOWN;
+
+                if (strcmp (orientation_string, "LeftSideUp") == 0) {
+                        /* Left side up, rotate counter clockwise to correct */
+                        orientation = PLY_PIXEL_BUFFER_ROTATE_COUNTER_CLOCKWISE;
+                }
+
+                if (strcmp (orientation_string, "RightSideUp") == 0) {
+                        /* Left side up, rotate clockwise to correct */
+                        orientation = PLY_PIXEL_BUFFER_ROTATE_CLOCKWISE;
+                }
+
+                ply_set_device_orientation (orientation);
+                free (orientation_string);
+        }
+
         scale_string = ply_key_file_get_value (key_file, "Daemon", "DeviceScale");
 
         if (scale_string != NULL) {
diff --git a/src/plugins/renderers/drm/plugin.c b/src/plugins/renderers/drm/plugin.c
index fea26eb..880d614 100644
--- a/src/plugins/renderers/drm/plugin.c
+++ b/src/plugins/renderers/drm/plugin.c
@@ -532,7 +532,7 @@ ply_renderer_connector_get_rotation_and_tiled (ply_renderer_backend_t      *back
         drmModePropertyPtr prop;
         uint64_t rotation;
 
-        output->rotation = PLY_PIXEL_BUFFER_ROTATE_UPRIGHT;
+        output->rotation = ply_get_device_orientation();
         output->tiled = false;
 
         for (i = 0; i < connector->count_props; i++) {
-- 
2.23.0