Added shadow config options

README.md

@@ -14,6 +14,10 @@ Sway is an incredible window manager, and certainly one of the most well establi
 
 + Corner radius: `corner_radius <val>`
 + Application saturation: `for_window [CRITERIA HERE] saturation <set|plus|minus> <val 0.0 <-> 2.0>`
++ Window shadows:
+    - `shadows on|off`
+    - `shadow_blur_radius <integer value 0 - 100>`
+    - `shadow_color <hex color with alpha> ex, #0000007F`
 + Dim unfocused windows:
     - `dim_inactive <float value 0.0 - 1.0>`
     - `dim_inactive_colors.unfocused <hex color> ex, #000000FF`
@@ -23,7 +27,6 @@ Sway is an incredible window manager, and certainly one of the most well establi
 
 + fade in / out animations
 + window movement animations
-+ drop shadows
 + blur
 
 ## Installation

config.in

@@ -24,6 +24,10 @@ set $menu dmenu_path | dmenu | xargs swaymsg exec --
 # window corner radius in px
 corner_radius 10
 
+shadows off
+shadow_blur_radius 20
+shadow_color #0000007F
+
 # inactive window fade amount. 0.0 = no dimming, 1.0 = fully dimmed
 dim_inactive 0.0
 dim_inactive_colors.unfocused #000000FF

include/sway/commands.h

@@ -177,6 +177,9 @@ sway_cmd cmd_scratchpad;
 sway_cmd cmd_seamless_mouse;
 sway_cmd cmd_set;
 sway_cmd cmd_shortcuts_inhibitor;
+sway_cmd cmd_shadow_blur_radius;
+sway_cmd cmd_shadow_color;
+sway_cmd cmd_shadows;
 sway_cmd cmd_show_marks;
 sway_cmd cmd_smart_borders;
 sway_cmd cmd_smart_gaps;

include/sway/config.h

@@ -474,6 +474,9 @@ struct sway_config {
 		float unfocused[4];
 		float urgent[4];
 	} dim_inactive_colors;
+	bool shadow_enabled;
+	int shadow_blur_sigma;
+	float shadow_color[4];
 
 	char *swaynag_command;
 	struct swaynag_instance swaynag_config_errors;

include/sway/tree/container.h

@@ -113,6 +113,8 @@ struct sway_container {
 	// Hidden scratchpad containers have a NULL parent.
 	bool scratchpad;
 
+	bool shadow_enabled;
+
 	float saturation;
 
 	float alpha;

sway/commands.c

@@ -87,6 +87,9 @@ static const struct cmd_handler handlers[] = {
 	{ "popup_during_fullscreen", cmd_popup_during_fullscreen },
 	{ "seat", cmd_seat },
 	{ "set", cmd_set },
+	{ "shadow_blur_radius", cmd_shadow_blur_radius },
+	{ "shadow_color", cmd_shadow_color },
+	{ "shadows", cmd_shadows },
 	{ "show_marks", cmd_show_marks },
 	{ "smart_borders", cmd_smart_borders },
 	{ "smart_gaps", cmd_smart_gaps },

sway/commands/shadow_blur_radius.c

@@ -0,0 +1,25 @@
+#include <string.h>
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "sway/tree/arrange.h"
+#include "sway/tree/container.h"
+#include "log.h"
+
+struct cmd_results *cmd_shadow_blur_radius(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "shadow_blur_radius", EXPECTED_EQUAL_TO, 1))) {
+		return error;
+	}
+
+	char *inv;
+	int value = strtol(argv[0], &inv, 10);
+	if (*inv != '\0' || value < 0 || value > 99) {
+		return cmd_results_new(CMD_FAILURE, "Invalid size specified");
+	}
+
+	config->shadow_blur_sigma = value;
+
+	arrange_root();
+
+	return cmd_results_new(CMD_SUCCESS, NULL);
+}

sway/commands/shadow_color.c

@@ -0,0 +1,25 @@
+#include "log.h"
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "sway/output.h"
+#include "sway/tree/arrange.h"
+#include "sway/tree/container.h"
+#include "util.h"
+
+struct cmd_results *cmd_shadow_color(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "shadow_color", EXPECTED_AT_LEAST, 1))) {
+		return error;
+	}
+
+	uint32_t color;
+	if (!parse_color(argv[0], &color)) {
+		return cmd_results_new(CMD_INVALID, "Invalid %s color %s",
+				"shadow_color", argv[0]);
+	}
+	color_to_rgba(config->shadow_color, color);
+
+	arrange_root();
+
+	return cmd_results_new(CMD_SUCCESS, NULL);
+}

sway/commands/shadows.c

@@ -0,0 +1,31 @@
+#include <string.h>
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "sway/tree/arrange.h"
+#include "sway/tree/view.h"
+#include "sway/tree/container.h"
+#include "log.h"
+#include "stringop.h"
+#include "util.h"
+
+struct cmd_results *cmd_shadows(int argc, char **argv) {
+	struct cmd_results *error = checkarg(argc, "shadows", EXPECTED_AT_LEAST, 1);
+
+	if (error) {
+		return error;
+	}
+
+	struct sway_container *con = config->handler_context.container;
+
+	bool result = parse_boolean(argv[0], config->shadow_enabled);
+	if (con == NULL) {
+		config->shadow_enabled = result;
+	} else {
+		con->shadow_enabled = result;
+		container_damage_whole(con);
+	}
+
+	arrange_root();
+
+	return cmd_results_new(CMD_SUCCESS, NULL);
+}

sway/config.c

@@ -330,6 +330,9 @@ static void config_defaults(struct sway_config *config) {
 	config->dim_inactive = 0.0f;
 	color_to_rgba(config->dim_inactive_colors.unfocused, 0x000000FF);
 	color_to_rgba(config->dim_inactive_colors.urgent, 0x900000FF);
+	config->shadow_enabled = false;
+	config->shadow_blur_sigma = 20.0f;
+	color_to_rgba(config->shadow_color, 0x0000007F);
 
 	// The keysym to keycode translation
 	struct xkb_rule_names rules = {0};

sway/desktop/render.c

@@ -1008,12 +1008,15 @@ static void render_containers_linear(struct sway_output *output,
 			}
 
 			// render shadow
-			const float color[4] = {0.0, 0.0, 0.0, 0.5};
-			float blur_sigma = 20;
+			if (child->shadow_enabled
+				&& config->shadow_blur_sigma > 0
+				&& config->shadow_color[3] > 0.0) {
 				struct wlr_box box = { state->x, state->y, state->width, state->height };
 				scale_box(&box, output->wlr_output->scale);
-			render_box_shadow(output, damage, &box, color, blur_sigma,
-					deco_data.corner_radius, child->current.border_thickness);
+				render_box_shadow(output, damage, &box, config->shadow_color,
+						config->shadow_blur_sigma, deco_data.corner_radius,
+						child->current.border_thickness);
+			}
 		} else {
 			render_container(output, damage, child,
 					parent->focused || child->current.focused);

sway/meson.build

@@ -103,6 +103,9 @@ sway_sources = files(
     'commands/seat/shortcuts_inhibitor.c',
     'commands/seat/xcursor_theme.c',
     'commands/set.c',
+    'commands/shadow_blur_radius.c',
+    'commands/shadow_color.c',
+    'commands/shadows.c',
     'commands/show_marks.c',
     'commands/shortcuts_inhibitor.c',
     'commands/smart_borders.c',

sway/sway.5.scd

@@ -598,6 +598,17 @@ The default colors are:
 *dim_inactive_colors.urgent* <hex color>
 	The color to dim inactive urgent windows with. Example color: #900000FF
 
+*shadows* <value>
+	Adjusts if shadows should be enabled or not (on|off). Can also be set per
+	window with *for_window*.
+
+*shadow_blur_radius* <value>
+	Adjusts the shadow blur radius of windows between 0 (disabled) and 100
+	while 20 is the default value.
+
+*shadow_color* <hex color with alpha>
+	The shadow color. Default color: #0000007F
+
 *default_border* normal|none|pixel [<n>]
 	Set default border style for new tiled windows.
 

sway/tree/container.c

@@ -41,6 +41,7 @@ struct sway_container *container_create(struct sway_view *view) {
 	c->view = view;
 	c->alpha = 1.0f;
 	c->saturation = 1.0f;
+	c->shadow_enabled = config->shadow_enabled;
 	c->corner_radius = config->corner_radius;
 
 	if (!view) {