调整壁纸绘制方案

src/include/xcb.h

@@ -82,6 +82,8 @@ typedef struct rect_size_t {
   uint32_t height;
 } rect_size_t;
 rect_size_t *get_screen_size(void);
+bar_cairo_params_t *prepare_wallpaper_surface_params(void);
+void refresh_root_window(void);
 void set_wallpaper(uint32_t *wallpaper_data);
 
 typedef struct window_list_t {
@@ -105,6 +107,8 @@ typedef enum atom_t {
   atom_wm_delete,
   atom_wm_take_focus,
   atom_net_wm_name,
+  atom__xrootpmap_id,
+  atom_esetroot_pmap_id,
 } atom_t;
 xcb_atom_t get_xcb_atom(atom_t atom);
 bool send_event(xcb_window_t window, atom_t atom);

src/main.c

@@ -25,7 +25,8 @@ static void init_monitors(void);
 static char **get_monitor_tags(uint32_t monitor_count, uint32_t monitor_index);
 static void init_wallpaper(void);
 static gboolean update_wallpaper(gpointer user_data);
-static void set_wallpaper_by_index(uint32_t index, wallpaper_config_t *config);
+static void set_wallpaper_by_index(uint32_t index, wallpaper_config_t *config,
+                                   cairo_t *cr);
 static wallpaper_config_t *parse_wallpaper_config(void);
 static void free_wallpaper_config(wallpaper_config_t *wallpaper_config);
 static void init_color_set(void);
@@ -70,6 +71,7 @@ static void cleanup(void);
 
 static monitor_t *monitors = NULL;
 static monitor_t *current_monitor = NULL;
+static cairo_t *wallpaper_cr = NULL;
 static wallpaper_config_t *wallpaper_config = NULL;
 static color_set_t *color_set = NULL;
 static GMainLoop *loop = NULL;
@@ -253,6 +255,28 @@ void init_wallpaper(void) {
   wallpaper_config = parse_wallpaper_config();
   if (!wallpaper_config) return;
 
+  bar_cairo_params_t *p = prepare_wallpaper_surface_params();
+  rect_size_t *screen_size = get_screen_size();
+  if (wallpaper_cr) cairo_destroy(wallpaper_cr);
+
+  cairo_surface_t *surface = cairo_xcb_surface_create(
+    p->conn, p->window, p->visual, screen_size->width, screen_size->height);
+  free(p);
+  free(screen_size);
+
+  if (cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
+    cairo_surface_destroy(surface);
+    return;
+  }
+
+  cairo_t *cr = cairo_create(surface);
+  if (cairo_status(cr) != CAIRO_STATUS_SUCCESS) {
+    cairo_destroy(cr);
+    return;
+  }
+  wallpaper_cr = cr;
+  cairo_surface_destroy(surface);
+
   update_wallpaper(wallpaper_config);
   if (!wallpaper_interval) return;
   g_timeout_add_seconds(wallpaper_interval, update_wallpaper, wallpaper_config);
@@ -260,10 +284,10 @@ void init_wallpaper(void) {
 
 gboolean update_wallpaper(gpointer user_data) {
   wallpaper_config_t *wc = user_data;
-  if (!wc) return false;
+  if (!wc || !wallpaper_cr) return false;
 
   static uint32_t index = 0;
-  set_wallpaper_by_index(index, wc);
+  set_wallpaper_by_index(index, wc, wallpaper_cr);
   uint32_t monitor_count = 0;
   for (monitor_t *m = monitors; m; m = m->next) monitor_count++;
 
@@ -278,22 +302,29 @@ gboolean update_wallpaper(gpointer user_data) {
   return true;
 }
 
-void set_wallpaper_by_index(uint32_t index, wallpaper_config_t *config) {
+void set_wallpaper_by_index(uint32_t index, wallpaper_config_t *config,
-  if (!config) return;
+                            cairo_t *cr) {
-
   rect_size_t *screen_size = get_screen_size();
-  uint32_t *wallpaper = generate_wallpaper(
+  uint32_t width = screen_size->width;
-    config, monitors, index, screen_size->width, screen_size->height);
+  uint32_t height = screen_size->height;
-
-  if (wallpaper) {
-    double start = get_time();
-    set_wallpaper(wallpaper);
-    double end = get_time();
-    free(wallpaper);
-    logger("set wallpaper cost: %fs\n", end - start);
-  }
-
   free(screen_size);
+
+  uint32_t *wallpaper =
+    generate_wallpaper(config, monitors, index, width, height);
+
+  if (!wallpaper) return;
+
+  double start = get_time();
+  uint8_t *data = (uint8_t *)wallpaper;
+  int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
+  cairo_surface_t *s = cairo_image_surface_create_for_data(
+    data, CAIRO_FORMAT_ARGB32, width, height, stride);
+  cairo_set_source_surface(cr, s, 0, 0);
+  cairo_paint(cr);
+  refresh_root_window();
+  free(wallpaper);
+  double end = get_time();
+  logger("set wallpaper cost: %fs\n", end - start);
 }
 
 wallpaper_config_t *parse_wallpaper_config(void) {
@@ -926,7 +957,9 @@ void cleanup(void) {
   clean_pango_context();
 
   free_wallpaper_config(wallpaper_config);
+  cairo_destroy(wallpaper_cr);
   wallpaper_config = NULL;
+  wallpaper_cr = NULL;
 
   free(color_set);
   color_set = NULL;

src/xcb/window.c

@@ -57,11 +57,6 @@ void get_window_class_instance(xcb_window_t window,
   xcb_icccm_get_wm_class_reply_wipe(&prop);
 }
 
-typedef struct visual_t {
-  uint8_t depth;
-  xcb_visualtype_t *visual;
-} visual_t;
-
 static visual_t *find_alpha_visual() {
   xcb_depth_iterator_t depth_iter;
   depth_iter = xcb_screen_allowed_depths_iterator(screen);

src/xcb/window.h

@@ -1,6 +1,13 @@
 #pragma once
 
+#include <stdbool.h>
 #include <xcb/xproto.h>
 
 void set_window_class_instance(xcb_window_t window, const char *class,
                                const char *instance);
+
+typedef struct visual_t {
+  uint8_t depth;
+  xcb_visualtype_t *visual;
+} visual_t;
+visual_t *get_xcb_visual(bool prefer_alpha);

src/xcb/wm-extension.c

@@ -26,6 +26,8 @@ static atom_map_t atom_map[] = {
   {.atom = atom_wm_delete, .name = "WM_DELETE_WINDOW"},
   {.atom = atom_wm_take_focus, .name = "WM_TAKE_FOCUS"},
   {.atom = atom_net_wm_name, .name = "_NET_WM_NAME"},
+  {.atom = atom__xrootpmap_id, .name = "_XROOTPMAP_ID"},
+  {.atom = atom_esetroot_pmap_id, .name = "ESETROOT_PMAP_ID"},
 };
 
 void init_icccm_extension(void) {

src/xcb/xcb.c

@@ -15,6 +15,7 @@
 
 #include "app.h"
 #include "utils.h"
+#include "window.h"
 #include "xcb-private.h"
 
 xcb_connection_t *conn = NULL;
@@ -150,6 +151,52 @@ rect_size_t *get_screen_size(void) {
   return size;
 }
 
+bar_cairo_params_t *prepare_wallpaper_surface_params(void) {
+  uint32_t width = screen->width_in_pixels;
+  uint32_t height = screen->height_in_pixels;
+  xcb_window_t root = screen->root;
+
+  visual_t *v = get_xcb_visual(false);
+
+  static xcb_pixmap_t pixmap = XCB_PIXMAP_NONE;
+  if (pixmap != XCB_PIXMAP_NONE) {
+    xcb_kill_client(conn, pixmap);
+    xcb_free_pixmap(conn, pixmap);
+  }
+
+  pixmap = xcb_generate_id(conn);
+  xcb_create_pixmap(conn, v->depth, pixmap, root, width, height);
+  xcb_gcontext_t gc = xcb_generate_id(conn);
+  xcb_create_gc(conn, gc, pixmap, 0, NULL);
+  xcb_change_window_attributes_value_list_t value_list = {
+    .background_pixmap = pixmap,
+  };
+  xcb_change_window_attributes_aux(conn, root, XCB_CW_BACK_PIXMAP, &value_list);
+
+  /* 兼容合成器，不设置若开启合成器壁纸会不显示 */
+  uint8_t mode = XCB_PROP_MODE_REPLACE;
+  xcb_atom_t atom = get_xcb_atom(atom__xrootpmap_id);
+  xcb_change_property(conn, mode, root, atom, XCB_ATOM_PIXMAP, 32, 1, &pixmap);
+  atom = get_xcb_atom(atom_esetroot_pmap_id);
+  xcb_change_property(conn, mode, root, atom, XCB_ATOM_PIXMAP, 32, 1, &pixmap);
+
+  xcb_clear_area(conn, 0, root, 0, 0, width, height);
+  xcb_free_gc(conn, gc);
+  xcb_flush(conn);
+
+  bar_cairo_params_t *p = ecalloc(1, sizeof(bar_cairo_params_t));
+  p->conn = conn;
+  p->visual = v->visual;
+  p->window = pixmap;
+  free(v);
+  return p;
+}
+
+void refresh_root_window(void) {
+  xcb_clear_area(conn, 0, screen->root, 0, 0, 0, 0);
+  xcb_flush(conn);
+}
+
 void set_wallpaper(uint32_t *wallpaper_data) {
   uint32_t width = screen->width_in_pixels;
   uint32_t height = screen->height_in_pixels;