Add client support for HiDPI

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

9 files changed, 96 insertions, 61 deletions

diff --git a/include/client/window.h b/include/client/window.h
index 296dd9ed..fbfbbc5f 100644
--- a/include/client/window.h
+++ b/include/client/window.h
@@ -51,12 +51,14 @@ struct window {
 	struct wl_callback *frame_cb;
 	struct cursor cursor;
 	uint32_t width, height;
+	int32_t scale;
 	char *font;
 	cairo_t *cairo;
 	struct pointer_input pointer_input;
 };
 
-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);
 void window_teardown(struct window *state);
 int window_prerender(struct window *state);
 int window_render(struct window *state);
diff --git a/swaybar/bar.c b/swaybar/bar.c
index f3767409..7ec3e0ea 100644
--- a/swaybar/bar.c
+++ b/swaybar/bar.c
@@ -152,12 +152,15 @@ void bar_setup(struct bar *bar, const char *socket_path, const char *bar_id) {
 
 		struct output_state *output = bar_output->registry->outputs->items[bar_output->idx];
 
-		bar_output->window = window_setup(bar_output->registry, output->width * output->scale, 30 * output->scale, false);
+		bar_output->window = window_setup(bar_output->registry,
+				output->width / output->scale, 30, output->scale, false);
 		if (!bar_output->window) {
 			sway_abort("Failed to create window.");
 		}
-		desktop_shell_set_panel(bar_output->registry->desktop_shell, output->output, bar_output->window->surface);
-		desktop_shell_set_panel_position(bar_output->registry->desktop_shell, bar->config->position);
+		desktop_shell_set_panel(bar_output->registry->desktop_shell,
+				output->output, bar_output->window->surface);
+		desktop_shell_set_panel_position(bar_output->registry->desktop_shell,
+				bar->config->position);
 
 		window_make_shell(bar_output->window);
 
diff --git a/swaybar/render.c b/swaybar/render.c
index 83b4cec7..58325050 100644
--- a/swaybar/render.c
+++ b/swaybar/render.c
@@ -8,6 +8,7 @@
 #include "swaybar/config.h"
 #include "swaybar/status_line.h"
 #include "swaybar/render.h"
+#include "log.h"
 
 
 /* internal spacing */
@@ -283,7 +284,8 @@ void render(struct output *output, struct config *config, struct status_line *li
 
 	if (line->protocol == TEXT) {
 		get_text_size(window->cairo, window->font, &width, &height, config->pango_markup, "%s", line->text_line);
-		cairo_move_to(cairo, window->width - margin - width, margin);
+		cairo_move_to(cairo, (window->width * window->scale)
+				- margin - width, margin);
 		pango_printf(window->cairo, window->font, config->pango_markup, "%s", line->text_line);
 	} else if (line->protocol == I3BAR && line->block_line) {
 		double pos = window->width - 0.5;
@@ -315,12 +317,13 @@ void render(struct output *output, struct config *config, struct status_line *li
 }
 
 void set_window_height(struct window *window, int height) {
-		int text_width, text_height;
-		get_text_size(window->cairo, window->font, &text_width, &text_height, false,
-				"Test string for measuring purposes");
-		if (height > 0) {
-			margin = (height - text_height) / 2;
-			ws_vertical_padding = margin - 1.5;
-		}
-		window->height = text_height + margin * 2;
+	int text_width, text_height;
+	get_text_size(window->cairo, window->font,
+			&text_width, &text_height, false,
+			"Test string for measuring purposes");
+	if (height > 0) {
+		margin = (height - text_height) / 2;
+		ws_vertical_padding = margin - 1.5;
+	}
+	window->height = (text_height + margin * 2) / window->scale;
 }
diff --git a/swaybg/main.c b/swaybg/main.c
index b23b8027..9dba0c8f 100644
--- a/swaybg/main.c
+++ b/swaybg/main.c
@@ -69,7 +69,8 @@ int main(int argc, const char **argv) {
 	sway_log(L_INFO, "Using output %d of %d", desired_output, registry->outputs->length);
 	int i;
 	struct output_state *output = registry->outputs->items[desired_output];
-	struct window *window = window_setup(registry, output->width, output->height, false);
+	struct window *window = window_setup(registry,
+			output->width, output->height, output->scale, false);
 	if (!window) {
 		sway_abort("Failed to create surfaces.");
 	}
@@ -115,60 +116,63 @@ int main(int argc, const char **argv) {
 			sway_abort("Unsupported scaling mode: %s", scaling_mode_str);
 		}
 
+		int wwidth = window->width * window->scale;
+		int wheight = window->height * window->scale;
+
 		for (i = 0; i < surfaces->length; ++i) {
 			struct window *window = surfaces->items[i];
 			if (window_prerender(window) && window->cairo) {
 				switch (scaling_mode) {
 				case SCALING_MODE_STRETCH:
 					cairo_scale(window->cairo,
-							(double) window->width / width,
-							(double) window->height / height);
+							(double) wwidth / width,
+							(double) wheight / height);
 					cairo_set_source_surface(window->cairo, image, 0, 0);
 					break;
 				case SCALING_MODE_FILL:
 				{
-					double window_ratio = (double) window->width / window->height;
+					double window_ratio = (double) wwidth / wheight;
 					double bg_ratio = width / height;
 
 					if (window_ratio > bg_ratio) {
-						double scale = (double) window->width / width;
+						double scale = (double) wwidth / width;
 						cairo_scale(window->cairo, scale, scale);
 						cairo_set_source_surface(window->cairo, image,
 								0,
-								(double) window->height/2 / scale - height/2);
+								(double) wheight/2 / scale - height/2);
 					} else {
-						double scale = (double) window->height / height;
+						double scale = (double) wheight / height;
 						cairo_scale(window->cairo, scale, scale);
 						cairo_set_source_surface(window->cairo, image,
-								(double) window->width/2 / scale - width/2,
+								(double) wwidth/2 / scale - width/2,
 								0);
 					}
 					break;
 				}
 				case SCALING_MODE_FIT:
 				{
-					double window_ratio = (double) window->width / window->height;
+					double window_ratio = (double) wwidth / wheight;
 					double bg_ratio = width / height;
 
 					if (window_ratio > bg_ratio) {
-						double scale = (double) window->height / height;
+						double scale = (double) wheight / height;
 						cairo_scale(window->cairo, scale, scale);
 						cairo_set_source_surface(window->cairo, image,
-								(double) window->width/2 / scale - width/2,
+								(double) wwidth/2 / scale - width/2,
 								0);
 					} else {
-						double scale = (double) window->width / width;
+						double scale = (double) wwidth / width;
 						cairo_scale(window->cairo, scale, scale);
 						cairo_set_source_surface(window->cairo, image,
 								0,
-								(double) window->height/2 / scale - height/2);
+								(double) wheight/2 / scale - height/2);
 					}
 					break;
 				}
 				case SCALING_MODE_CENTER:
 					cairo_set_source_surface(window->cairo, image,
-							(double) window->width/2 - width/2,
-							(double) window->height/2 - height/2);
+							(double) wwidth/2 - width/2,
+							(double) wheight/2 - height/2);
 					break;
 				case SCALING_MODE_TILE:
 				{
diff --git a/swaylock/main.c b/swaylock/main.c
index 0637453c..075e44e7 100644
--- a/swaylock/main.c
+++ b/swaylock/main.c
@@ -223,58 +223,60 @@ void render_color(struct window *window, uint32_t color) {
 void render_image(struct window *window, cairo_surface_t *image, enum scaling_mode scaling_mode) {
 	double width = cairo_image_surface_get_width(image);
 	double height = cairo_image_surface_get_height(image);
+	int wwidth = window->width * window->scale;
+	int wheight = window->height * window->scale;
 
 	switch (scaling_mode) {
 	case SCALING_MODE_STRETCH:
 		cairo_scale(window->cairo,
-				(double) window->width / width,
-				(double) window->height / height);
+				(double) wwidth / width,
+				(double) wheight / height);
 		cairo_set_source_surface(window->cairo, image, 0, 0);
 		break;
 	case SCALING_MODE_FILL:
 	{
-		double window_ratio = (double) window->width / window->height;
-		double bg_ratio = width / height;
+		double window_ratio = (double) wwidth / wheight;
+		double bg_ratio = wheight;
 
 		if (window_ratio > bg_ratio) {
-			double scale = (double) window->width / width;
+			double scale = (double) wwidth / width;
 			cairo_scale(window->cairo, scale, scale);
 			cairo_set_source_surface(window->cairo, image,
 					0,
-					(double) window->height/2 / scale - height/2);
+					(double) wheight/2 / scale - height/2);
 		} else {
-			double scale = (double) window->height / height;
+			double scale = (double) wheight / height;
 			cairo_scale(window->cairo, scale, scale);
 			cairo_set_source_surface(window->cairo, image,
-					(double) window->width/2 / scale - width/2,
+					(double) wwidth/2 / scale - width/2,
 					0);
 		}
 		break;
 	}
 	case SCALING_MODE_FIT:
 	{
-		double window_ratio = (double) window->width / window->height;
+		double window_ratio = (double) wwidth / wheight;
 		double bg_ratio = width / height;
 
 		if (window_ratio > bg_ratio) {
-			double scale = (double) window->height / height;
+			double scale = (double) wheight / height;
 			cairo_scale(window->cairo, scale, scale);
 			cairo_set_source_surface(window->cairo, image,
-					(double) window->width/2 / scale - width/2,
+					(double) wwidth/2 / scale - width/2,
 					0);
 		} else {
-			double scale = (double) window->width / width;
+			double scale = (double) wwidth / width;
 			cairo_scale(window->cairo, scale, scale);
 			cairo_set_source_surface(window->cairo, image,
 					0,
-					(double) window->height/2 / scale - height/2);
+					(double) wheight/2 / scale - height/2);
 		}
 		break;
 	}
 	case SCALING_MODE_CENTER:
 		cairo_set_source_surface(window->cairo, image,
-				(double) window->width/2 - width/2,
-				(double) window->height/2 - height/2);
+				(double) wwidth/2 - width/2,
+				(double) wheight/2 - height/2);
 		break;
 	case SCALING_MODE_TILE:
 	{
@@ -477,7 +479,8 @@ int main(int argc, char **argv) {
 
 	for (i = 0; i < registry->outputs->length; ++i) {
 		struct output_state *output = registry->outputs->items[i];
-		struct window *window = window_setup(registry, output->width, output->height, true);
+		struct window *window = window_setup(registry,
+				output->width, output->height, output->scale, true);
 		if (!window) {
 			sway_abort("Failed to create surfaces.");
 		}
@@ -564,6 +567,8 @@ void render(struct render_data *render_data) {
 		if (!window_prerender(window) || !window->cairo) {
 			continue;
 		}
+		int wwidth = window->width * window->scale;
+		int wheight = window->height * window->scale;
 
 		// Reset the transformation matrix
 		cairo_identity_matrix(window->cairo);
@@ -595,7 +600,7 @@ void render(struct render_data *render_data) {
 		if (show_indicator && render_data->auth_state != AUTH_STATE_IDLE) {
 			// Draw circle
 			cairo_set_line_width(window->cairo, ARC_THICKNESS);
-			cairo_arc(window->cairo, window->width/2, window->height/2, ARC_RADIUS, 0, 2 * M_PI);
+			cairo_arc(window->cairo, wwidth/2, wheight/2, ARC_RADIUS, 0, 2 * M_PI);
 			switch (render_data->auth_state) {
 			case AUTH_STATE_INPUT:
 			case AUTH_STATE_BACKSPACE: {
@@ -638,8 +643,8 @@ void render(struct render_data *render_data) {
 				double x, y;
 
 				cairo_text_extents(window->cairo, text, &extents);
-				x = window->width/2 - ((extents.width/2) + extents.x_bearing);
-				y = window->height/2 - ((extents.height/2) + extents.y_bearing);
+				x = wwidth/2 - ((extents.width/2) + extents.x_bearing);
+				y = wheight/2 - ((extents.height/2) + extents.y_bearing);
 
 				cairo_move_to(window->cairo, x, y);
 				cairo_show_text(window->cairo, text);
@@ -651,7 +656,7 @@ void render(struct render_data *render_data) {
 			if (render_data->auth_state == AUTH_STATE_INPUT || render_data->auth_state == AUTH_STATE_BACKSPACE) {
 				static double highlight_start = 0;
 				highlight_start += (rand() % (int)(M_PI * 100)) / 100.0 + M_PI * 0.5;
-				cairo_arc(window->cairo, window->width/2, window->height/2, ARC_RADIUS, highlight_start, highlight_start + TYPE_INDICATOR_RANGE);
+				cairo_arc(window->cairo, wwidth/2, wheight/2, ARC_RADIUS, highlight_start, highlight_start + TYPE_INDICATOR_RANGE);
 				if (render_data->auth_state == AUTH_STATE_INPUT) {
 					cairo_set_source_rgb(window->cairo, 51.0 / 255, 219.0 / 255, 0);
 				} else {
@@ -661,19 +666,19 @@ void render(struct render_data *render_data) {
 
 				// Draw borders
 				cairo_set_source_rgb(window->cairo, 0, 0, 0);
-				cairo_arc(window->cairo, window->width/2, window->height/2, ARC_RADIUS, highlight_start, highlight_start + TYPE_INDICATOR_BORDER_THICKNESS);
+				cairo_arc(window->cairo, wwidth/2, wheight/2, ARC_RADIUS, highlight_start, highlight_start + TYPE_INDICATOR_BORDER_THICKNESS);
 				cairo_stroke(window->cairo);
 
-				cairo_arc(window->cairo, window->width/2, window->height/2, ARC_RADIUS, highlight_start + TYPE_INDICATOR_RANGE, (highlight_start + TYPE_INDICATOR_RANGE) + TYPE_INDICATOR_BORDER_THICKNESS);
+				cairo_arc(window->cairo, wwidth/2, wheight/2, ARC_RADIUS, highlight_start + TYPE_INDICATOR_RANGE, (highlight_start + TYPE_INDICATOR_RANGE) + TYPE_INDICATOR_BORDER_THICKNESS);
 				cairo_stroke(window->cairo);
 			}
 
 			// Draw inner + outer border of the circle
 			cairo_set_source_rgb(window->cairo, 0, 0, 0);
 			cairo_set_line_width(window->cairo, 2.0);
-			cairo_arc(window->cairo, window->width/2, window->height/2, ARC_RADIUS - ARC_THICKNESS/2, 0, 2*M_PI);
+			cairo_arc(window->cairo, wwidth/2, wheight/2, ARC_RADIUS - ARC_THICKNESS/2, 0, 2*M_PI);
 			cairo_stroke(window->cairo);
-			cairo_arc(window->cairo, window->width/2, window->height/2, ARC_RADIUS + ARC_THICKNESS/2, 0, 2*M_PI);
+			cairo_arc(window->cairo, wwidth/2, wheight/2, ARC_RADIUS + ARC_THICKNESS/2, 0, 2*M_PI);
 			cairo_stroke(window->cairo);
 		}
 		window_render(window);
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;