[PATCH v4 3/5] winewayland: Set the window viewport source rectangle.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/winewayland.drv/wayland_surface.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/dlls/winewayland.drv/wayland_surface.c b/dlls/winewayland.drv/wayland_surface.c
index cfeb44508e8..5ca8b010746 100644
--- a/dlls/winewayland.drv/wayland_surface.c
+++ b/dlls/winewayland.drv/wayland_surface.c
@@ -352,8 +352,22 @@ void wayland_surface_attach_shm(struct wayland_surface *surface,
         free(surface_damage);
     }

-    surface->content_width = shm_buffer->width;
-    surface->content_height = shm_buffer->height;
+    win_width = surface->window.rect.right - surface->window.rect.left;
+    win_height = surface->window.rect.bottom - surface->window.rect.top;
+
+    /* It is an error to specify a wp_viewporter source rectangle that
+     * is partially or completely outside of the wl_buffe.
+     * 0 is also an invalid width / height value so use 1x1 instead.
+     */
+    win_width = max(1, min(win_width, shm_buffer->width));
+    win_height = max(1, min(win_height, shm_buffer->height));
+
+    wp_viewport_set_source(surface->wp_viewport, 0, 0,
+                           wl_fixed_from_int(win_width),
+                           wl_fixed_from_int(win_height));
+
+    surface->content_width = win_width;
+    surface->content_height = win_height;
 }

/**********************************************************************