window: Let clients set buffer transformations

When a window's buffer transformation is set, its buffers are
reallocated with the appropriate size (i.e., with width and height
swapped in case of 90 or 270 degree rotation).

diff --git a/clients/window.c b/clients/window.c
index fa247ab..d08542d 100644 (file)
--- a/clients/window.c
+++ b/clients/window.c
@@ -209,6 +209,7 @@ struct window {
        int focus_count;
 
        enum window_buffer_type buffer_type;
+       enum wl_output_transform buffer_transform;
        struct toysurface *toysurface;
        cairo_surface_t *cairo_surface;
 
@@ -1181,34 +1182,61 @@ window_get_display(struct window *window)
 static void
 window_create_surface(struct window *window)
 {
+       struct rectangle allocation = window->allocation;
        uint32_t flags = 0;
        int dx, dy;
 
        if (!window->transparent)
                flags = SURFACE_OPAQUE;
 
+       switch (window->buffer_transform) {
+       case WL_OUTPUT_TRANSFORM_90:
+       case WL_OUTPUT_TRANSFORM_270:
+       case WL_OUTPUT_TRANSFORM_FLIPPED_90:
+       case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+               allocation.width = window->allocation.height;
+               allocation.height = window->allocation.width;
+               break;
+       default:
+               break;
+       }
+
        if (!window->toysurface &&
            window->buffer_type == WINDOW_BUFFER_TYPE_EGL_WINDOW &&
            window->display->dpy) {
                window->toysurface =
                        egl_window_surface_create(window->display,
                                                  window->surface, flags,
-                                                 &window->allocation);
+                                                 &allocation);
        }
 
        if (!window->toysurface)
                window->toysurface = shm_surface_create(window->display,
                                                        window->surface, flags,
-                                                       &window->allocation);
+                                                       &allocation);
 
        window_get_resize_dx_dy(window, &dx, &dy);
        window->cairo_surface =
                window->toysurface->prepare(window->toysurface, dx, dy,
-                                           window->allocation.width,
-                                           window->allocation.height,
+                                           allocation.width,
+                                           allocation.height,
                                            window->resizing);
 }
 
+int
+window_get_buffer_transform(struct window *window)
+{
+       return window->buffer_transform;
+}
+
+void
+window_set_buffer_transform(struct window *window,
+                           enum wl_output_transform transform)
+{
+       window->buffer_transform = transform;
+       wl_surface_set_buffer_transform(window->surface, transform);
+}
+
 static void frame_destroy(struct frame *frame);
 
 void

diff --git a/clients/window.h b/clients/window.h
index 804eef5..f13ea35 100644 (file)
--- a/clients/window.h
+++ b/clients/window.h
@@ -240,6 +240,13 @@ void
 window_show_frame_menu(struct window *window,
                       struct input *input, uint32_t time);
 
+int
+window_get_buffer_transform(struct window *window);
+
+void
+window_set_buffer_transform(struct window *window,
+                           enum wl_output_transform transform);
+
 void
 window_destroy(struct window *window);