feat: Add box shadows (#64)

Co-authored-by: Erik Reider <[email protected]>

4 files changed, 24 insertions, 0 deletions

diff --git a/include/sway/commands.h b/include/sway/commands.h
index 98b232e1..256b3506 100644
--- a/include/sway/commands.h
+++ b/include/sway/commands.h
@@ -178,6 +178,9 @@ 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;
diff --git a/include/sway/config.h b/include/sway/config.h
index 55aa8fbe..bcb06f0f 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -482,6 +482,9 @@ 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;
diff --git a/include/sway/desktop/fx_renderer.h b/include/sway/desktop/fx_renderer.h
index c5bae260..1c3121cd 100644
--- a/include/sway/desktop/fx_renderer.h
+++ b/include/sway/desktop/fx_renderer.h
@@ -47,6 +47,8 @@ struct fx_renderer {
 
 	float projection[9];
 
+	GLuint stencil_buffer_id;
+
 	struct {
 		bool OES_egl_image_external;
 	} exts;
@@ -84,6 +86,17 @@ struct fx_renderer {
 			GLint half_thickness;
 		} corner;
 
+		struct {
+			GLuint program;
+			GLint proj;
+			GLint color;
+			GLint pos_attrib;
+			GLint position;
+			GLint size;
+			GLint blur_sigma;
+			GLint corner_radius;
+		} box_shadow;
+
 		struct gles2_tex_shader tex_rgba;
 		struct gles2_tex_shader tex_rgbx;
 		struct gles2_tex_shader tex_ext;
@@ -118,4 +131,7 @@ void fx_render_border_corner(struct fx_renderer *renderer, const struct wlr_box
 		const float color[static 4], const float projection[static 9],
 		enum corner_location corner_location, int radius, int border_thickness);
 
+void fx_render_box_shadow(struct fx_renderer *renderer, const struct wlr_box *box,
+		const float color[static 4], const float projection[static 9], int radius, float blur_sigma);
+
 #endif
diff --git a/include/sway/tree/container.h b/include/sway/tree/container.h
index 75a8113a..91448ac7 100644
--- a/include/sway/tree/container.h
+++ b/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;