[PATCH v3 1/3] winewayland: Set the window viewport source rectangle.

[Rémi Bernon]

From: Rémi Bernon

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

diff --git a/dlls/winewayland.drv/wayland_surface.c b/dlls/winewayland.drv/wayland_surface.c
index a2699d66e51..bf65edd77fb 100644
--- a/dlls/winewayland.drv/wayland_surface.c
+++ b/dlls/winewayland.drv/wayland_surface.c
@@ -351,6 +351,24 @@ void wayland_surface_attach_shm(struct wayland_surface *surface,

surface->buffer_width = shm_buffer->width;
     surface->buffer_height = shm_buffer->height;
+
+    if (surface->wp_viewport)
+    {
+        int win_width, win_height, width, 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_buffer. */
+        width = min(win_width, surface->buffer_width);
+        height = min(win_height, surface->buffer_height);
+
+        if (width != 0 && height != 0)
+            wp_viewport_set_source(surface->wp_viewport, 0, 0, width << 8, height << 8);
+        else
+            wp_viewport_set_source(surface->wp_viewport, -1, -1, -1, -1);
+    }
 }

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