Add screen rotation support (tested on amd/intel)

screen rotation in wayland is best effort,
wayland doesn't give the necessary information to make it robust.

3 files changed, 19 insertions, 2 deletions

diff --git a/include/color_conversion.h b/include/color_conversion.h
index 07b29f6..8bfe599 100644
--- a/include/color_conversion.h
+++ b/include/color_conversion.h
@@ -20,6 +20,11 @@ typedef enum {
 } gsr_destination_color;
 
 typedef struct {
+    int offset;
+    int rotation;
+} gsr_color_uniforms;
+
+typedef struct {
     gsr_egl *egl;
 
     gsr_source_color source_color;
@@ -33,7 +38,7 @@ typedef struct {
 
 typedef struct {
     gsr_color_conversion_params params;
-    int rotation_uniforms[2];
+    gsr_color_uniforms uniforms[2];
     gsr_shader shaders[2];
 
     unsigned int framebuffers[2];
diff --git a/include/egl.h b/include/egl.h
index b8513fd..4705742 100644
--- a/include/egl.h
+++ b/include/egl.h
@@ -119,6 +119,7 @@ typedef struct {
     void *output;
     vec2i pos;
     vec2i size;
+    int32_t transform;
     char *name;
 } gsr_wayland_output;
 
@@ -215,6 +216,7 @@ typedef struct {
     void (*glBlendFunc)(unsigned int sfactor, unsigned int dfactor);
     int (*glGetUniformLocation)(unsigned int program, const char *name);
     void (*glUniform1f)(int location, float v0);
+    void (*glUniform2f)(int location, float v0, float v1);
 } gsr_egl;
 
 bool gsr_egl_load(gsr_egl *self, Display *dpy, bool wayland);
diff --git a/include/utils.h b/include/utils.h
index 26a0aed..898f375 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -18,13 +18,22 @@ typedef struct {
     int gpu_version; /* 0 if unknown */
 } gsr_gpu_info;
 
+typedef enum {
+    GSR_MONITOR_ROT_0,
+    GSR_MONITOR_ROT_90,
+    GSR_MONITOR_ROT_180,
+    GSR_MONITOR_ROT_270
+} gsr_monitor_rotation;
+
 typedef struct {
     const char *name;
     int name_len;
     vec2i pos;
     vec2i size;
     XRRCrtcInfo *crt_info; /* Only on x11 */
-    uint32_t connector_id; /* Only on drm */
+    uint32_t connector_id; /* Only on x11 and drm */
+    gsr_monitor_rotation rotation; /* Only on x11 and wayland */
+    uint32_t monitor_identifier; /* Only on drm and wayland */
 } gsr_monitor;
 
 typedef enum {
@@ -46,6 +55,7 @@ typedef void (*active_monitor_callback)(const gsr_monitor *monitor, void *userda
 void for_each_active_monitor_output_x11(Display *display, active_monitor_callback callback, void *userdata);
 void for_each_active_monitor_output(const gsr_egl *egl, gsr_connection_type connection_type, active_monitor_callback callback, void *userdata);
 bool get_monitor_by_name(const gsr_egl *egl, gsr_connection_type connection_type, const char *name, gsr_monitor *monitor);
+gsr_monitor_rotation drm_monitor_get_display_server_rotation(const gsr_egl *egl, const gsr_monitor *monitor);
 
 bool gl_get_gpu_info(gsr_egl *egl, gsr_gpu_info *info);