Add client support for HiDPI

This adds HiDPI support to swaybar, swaybg, and swaylock.

4 files changed, 27 insertions, 9 deletions

diff --git a/wayland/buffers.c b/wayland/buffers.c
index ff1e5ecf..227d6d2c 100644
--- a/wayland/buffers.c
+++ b/wayland/buffers.c
@@ -50,8 +50,10 @@ static const struct wl_buffer_listener buffer_listener = {
 };
 
 static struct buffer *create_buffer(struct window *window, struct buffer *buf,
-                int32_t width, int32_t height, uint32_t format) {
+                int32_t width, int32_t height, int32_t scale, uint32_t format) {
 
+        width *= scale;
+        height *= scale;
         uint32_t stride = width * 4;
         uint32_t size = stride * height;
 
@@ -63,7 +65,8 @@ static struct buffer *create_buffer(struct window *window, struct buffer *buf,
         }
         void *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
         struct wl_shm_pool *pool = wl_shm_create_pool(window->registry->shm, fd, size);
-        buf->buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride, format);
+        buf->buffer = wl_shm_pool_create_buffer(pool, 0,
+                        width, height, stride, format);
         wl_shm_pool_destroy(pool);
         close(fd);
         unlink(name);
@@ -72,10 +75,10 @@ static struct buffer *create_buffer(struct window *window, struct buffer *buf,
 
         buf->width = width;
         buf->height = height;
-        buf->surface = cairo_image_surface_create_for_data(data, CAIRO_FORMAT_ARGB32, width, height, stride);
+        buf->surface = cairo_image_surface_create_for_data(data,
+                        CAIRO_FORMAT_ARGB32, width, height, stride);
         buf->cairo = cairo_create(buf->surface);
         buf->pango = pango_cairo_create_context(buf->cairo);
-        pango_cairo_context_set_resolution(buf->pango, 96 * 2);
 
         wl_buffer_add_listener(buf->buffer, &buffer_listener, buf);
         return buf;
@@ -114,7 +117,9 @@ struct buffer *get_next_buffer(struct window *window) {
         }
 
         if (!buffer->buffer) {
-                if (!create_buffer(window, buffer, window->width, window->height, WL_SHM_FORMAT_ARGB8888)) {
+                if (!create_buffer(window, buffer,
+                                        window->width, window->height, window->scale,
+                                        WL_SHM_FORMAT_ARGB8888)) {
                         return NULL;
                 }
         }
diff --git a/wayland/pango.c b/wayland/pango.c
index f143aa6c..d601021f 100644
--- a/wayland/pango.c
+++ b/wayland/pango.c
@@ -9,6 +9,8 @@
 
 PangoLayout *get_pango_layout(cairo_t *cairo, const char *font, const char *text, bool markup) {
         PangoLayout *layout = pango_cairo_create_layout(cairo);
+        PangoAttrList *attrs = pango_attr_list_new();
+        pango_attr_list_insert(attrs, pango_attr_scale_new(2));
         if (markup) {
                 pango_layout_set_markup(layout, text, -1);
         } else {
@@ -17,6 +19,8 @@ PangoLayout *get_pango_layout(cairo_t *cairo, const char *font, const char *text
         PangoFontDescription *desc = pango_font_description_from_string(font);
         pango_layout_set_font_description(layout, desc);
         pango_layout_set_single_paragraph_mode(layout, 1);
+        pango_layout_set_attributes(layout, attrs);
+        pango_attr_list_unref(attrs);
         pango_font_description_free(desc);
         return layout;
 }
diff --git a/wayland/registry.c b/wayland/registry.c
index 2d66b7eb..44afb146 100644
--- a/wayland/registry.c
+++ b/wayland/registry.c
@@ -18,6 +18,8 @@ static void display_handle_mode(void *data, struct wl_output *wl_output,
                 state->flags = flags;
                 state->width = width;
                 state->height = height;
+                sway_log(L_DEBUG, "Got mode %dx%x:0x%X for output %p",
+                                width, height, flags, data);
         }
 }
 
@@ -34,6 +36,7 @@ static void display_handle_done(void *data, struct wl_output *wl_output) {
 static void display_handle_scale(void *data, struct wl_output *wl_output, int32_t factor) {
         struct output_state *state = data;
         state->scale = factor;
+        sway_log(L_DEBUG, "Got scale factor %d for output %p", factor, data);
 }
 
 static const struct wl_output_listener output_listener = {
diff --git a/wayland/window.c b/wayland/window.c
index 3f48d39f..8a506656 100644
--- a/wayland/window.c
+++ b/wayland/window.c
@@ -93,11 +93,13 @@ void window_make_shell(struct window *window) {
         wl_shell_surface_set_toplevel(window->shell_surface);
 }
 
-struct window *window_setup(struct registry *registry, uint32_t width, uint32_t height, bool shell_surface) {
+struct window *window_setup(struct registry *registry, uint32_t width, uint32_t height,
+                int32_t scale, bool shell_surface) {
         struct window *window = malloc(sizeof(struct window));
         memset(window, 0, sizeof(struct window));
         window->width = width;
         window->height = height;
+        window->scale = scale;
         window->registry = registry;
         window->font = "monospace 10";
 
@@ -121,15 +123,18 @@ struct window *window_setup(struct registry *registry, uint32_t width, uint32_t
                         cursor_size = "16";
                 }
 
+                sway_log(L_DEBUG, "Cursor scale: %d", scale);
                 window->cursor.cursor_theme = wl_cursor_theme_load(cursor_theme,
-                                atoi(cursor_size), registry->shm);
+                                atoi(cursor_size) * scale, registry->shm);
                 window->cursor.cursor = wl_cursor_theme_get_cursor(window->cursor.cursor_theme, "left_ptr");
                 window->cursor.surface = wl_compositor_create_surface(registry->compositor);
 
                 struct wl_cursor_image *image = window->cursor.cursor->images[0];
                 struct wl_buffer *cursor_buf = wl_cursor_image_get_buffer(image);
                 wl_surface_attach(window->cursor.surface, cursor_buf, 0, 0);
-                wl_surface_damage(window->cursor.surface, 0, 0, image->width, image->height);
+                wl_surface_set_buffer_scale(window->cursor.surface, scale);
+                wl_surface_damage(window->cursor.surface, 0, 0,
+                                image->width, image->height);
                 wl_surface_commit(window->cursor.surface);
         }
 
@@ -159,8 +164,9 @@ int window_render(struct window *window) {
         window->frame_cb = wl_surface_frame(window->surface);
         wl_callback_add_listener(window->frame_cb, &listener, window);
 
-        wl_surface_damage(window->surface, 0, 0, window->buffer->width, window->buffer->height);
         wl_surface_attach(window->surface, window->buffer->buffer, 0, 0);
+        wl_surface_set_buffer_scale(window->surface, window->scale);
+        wl_surface_damage(window->surface, 0, 0, window->width, window->height);
         wl_surface_commit(window->surface);
 
         return 1;