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[uwac] add scaling support using viewporter protocol

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Wayland compositors can support the wp_viewporter protocol,
which allows for the mapping of arbitrarily sized buffer
regions to output surfaces.
This result in correct scaling on HiDPI outputs with scaling
enabled.
This commit is contained in:
Mariusz Bialonczyk 2023-12-30 13:00:37 +01:00 committed by akallabeth
parent 5f0db48443
commit c29ba79851
2 changed files with 20 additions and 0 deletions
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1
uwac/libuwac/uwac-priv.h
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@ -250,6 +250,7 @@ struct uwac_window
ssize_t drawingBufferIdx;
ssize_t pendingBufferIdx;
struct wl_surface* surface;
struct wp_viewport* viewport;
struct wl_shell_surface* shell_surface;
struct xdg_surface* xdg_surface;
struct xdg_toplevel* xdg_toplevel;

19
uwac/libuwac/uwac-window.c
View File

@ -87,6 +87,9 @@ static void xdg_handle_toplevel_configure(void* data, struct xdg_toplevel* xdg_t
int32_t width, int32_t height, struct wl_array* states)
{
UwacWindow* window = (UwacWindow*)data;
int scale = window->display->actual_scale;
width *= scale;
height *= scale;
UwacConfigureEvent* event;
int ret, surfaceState;
enum xdg_toplevel_state* state;
@ -150,6 +153,15 @@ static void xdg_handle_toplevel_configure(void* data, struct xdg_toplevel* xdg_t
window->drawingBufferIdx = 0;
if (window->pendingBufferIdx != -1)
window->pendingBufferIdx = window->drawingBufferIdx;
if (window->viewport)
{
wp_viewport_set_source(window->viewport, wl_fixed_from_int(0), wl_fixed_from_int(0),
wl_fixed_from_int(window->width * scale),
wl_fixed_from_int(window->height * scale));
wp_viewport_set_destination(window->viewport, window->width * scale,
window->height * scale);
}
}
else
{
@ -551,6 +563,10 @@ UwacWindow* UwacCreateWindowShm(UwacDisplay* display, uint32_t width, uint32_t h
wl_shell_surface_set_toplevel(w->shell_surface);
}
w->viewport = wp_viewporter_get_viewport(display->viewporter, w->surface);
if (display->actual_scale != 1)
wl_surface_set_buffer_scale(w->surface, display->actual_scale);
wl_list_insert(display->windows.prev, &w->link);
display->last_error = UWAC_SUCCESS;
UwacWindowSetDecorations(w);
@ -593,6 +609,9 @@ UwacReturnCode UwacDestroyWindow(UwacWindow** pwindow)
if (w->input_region)
wl_region_destroy(w->input_region);
if (w->viewport)
wp_viewport_destroy(w->viewport);
wl_surface_destroy(w->surface);
wl_list_remove(&w->link);
free(w);