Remove support for 32-bit visuals and RGBA colors.

fixes #1984

i3bar/include/cairo_util.h

@@ -15,7 +15,6 @@ typedef struct color_t {
     double red;
     double green;
     double blue;
-    double alpha;
 
     /* For compatibility, we also store the colorpixel for now. */
     uint32_t colorpixel;

i3bar/src/cairo_util.c

@@ -51,25 +51,15 @@ void cairo_surface_free(surface_t *surface) {
  *
  */
 color_t cairo_hex_to_color(const char *color) {
-    char alpha[2];
-    if (strlen(color) == strlen("#rrggbbaa")) {
-        alpha[0] = color[7];
-        alpha[1] = color[8];
-    } else {
-        alpha[0] = alpha[1] = 'F';
-    }
-
-    char groups[4][3] = {
+    char groups[3][3] = {
         {color[1], color[2], '\0'},
         {color[3], color[4], '\0'},
-        {color[5], color[6], '\0'},
-        {alpha[0], alpha[1], '\0'}};
+        {color[5], color[6], '\0'}};
 
     return (color_t){
         .red = strtol(groups[0], NULL, 16) / 255.0,
         .green = strtol(groups[1], NULL, 16) / 255.0,
         .blue = strtol(groups[2], NULL, 16) / 255.0,
-        .alpha = strtol(groups[3], NULL, 16) / 255.0,
         .colorpixel = get_colorpixel(color)};
 }
 
@@ -78,7 +68,7 @@ color_t cairo_hex_to_color(const char *color) {
  *
  */
 void cairo_set_source_color(surface_t *surface, color_t color) {
-    cairo_set_source_rgba(surface->cr, color.red, color.green, color.blue, color.alpha);
+    cairo_set_source_rgb(surface->cr, color.red, color.green, color.blue);
 }
 
 /**

i3bar/src/xcb.c

@@ -1122,21 +1122,7 @@ char *init_xcb_early() {
 
     depth = root_screen->root_depth;
     colormap = root_screen->default_colormap;
-    visual_type = xcb_aux_find_visual_by_attrs(root_screen, -1, 32);
-    if (visual_type) {
-        depth = xcb_aux_get_depth_of_visual(root_screen, visual_type->visual_id);
-        colormap = xcb_generate_id(xcb_connection);
-        xcb_void_cookie_t cm_cookie = xcb_create_colormap_checked(xcb_connection,
-                                                                  XCB_COLORMAP_ALLOC_NONE,
-                                                                  colormap,
-                                                                  xcb_root,
-                                                                  visual_type->visual_id);
-        if (xcb_request_failed(cm_cookie, "Could not allocate colormap")) {
-            exit(EXIT_FAILURE);
-        }
-    } else {
-        visual_type = get_visualtype(root_screen);
-    }
+    visual_type = get_visualtype(root_screen);
 
     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
      * this way, we can choose to crop it */