#include <stdbool.h>
#include <err.h>
+#if PANGO_SUPPORT
+#include <cairo/cairo-xcb.h>
+#include <pango/pangocairo.h>
+#endif
+
#include "libi3.h"
extern xcb_connection_t *conn;
+extern xcb_screen_t *root_screen;
+
static const i3Font *savedFont = NULL;
+#if PANGO_SUPPORT
+static xcb_visualtype_t *root_visual_type;
+static double pango_font_red;
+static double pango_font_green;
+static double pango_font_blue;
+
+/*
+ * Loads a Pango font description into an i3Font structure. Returns true
+ * on success, false otherwise.
+ *
+ */
+static bool load_pango_font(i3Font *font, const char *desc) {
+ /* Load the font description */
+ font->specific.pango_desc = pango_font_description_from_string(desc);
+ if (!font->specific.pango_desc)
+ return false;
+
+ /* We cache root_visual_type here, since you must call
+ * load_pango_font before any other pango function
+ * that would need root_visual_type */
+ root_visual_type = get_visualtype(root_screen);
+
+ /* Create a dummy Pango layout to compute the font height */
+ cairo_surface_t *surface = cairo_xcb_surface_create(conn, root_screen->root, root_visual_type, 1, 1);
+ cairo_t *cr = cairo_create(surface);
+ PangoLayout *layout = pango_cairo_create_layout(cr);
+ pango_layout_set_font_description(layout, font->specific.pango_desc);
+
+ /* Get the font height */
+ gint height;
+ pango_layout_get_pixel_size(layout, NULL, &height);
+ font->height = height;
+
+ /* Free resources */
+ g_object_unref(layout);
+ cairo_destroy(cr);
+ cairo_surface_destroy(surface);
+
+ /* Set the font type and return successfully */
+ font->type = FONT_TYPE_PANGO;
+ return true;
+}
+
+/*
+ * Draws text using Pango rendering.
+ *
+ */
+static void draw_text_pango(const char *text, size_t text_len,
+ xcb_drawable_t drawable, int x, int y, int max_width) {
+ /* Create the Pango layout */
+ /* root_visual_type is cached in load_pango_font */
+ cairo_surface_t *surface = cairo_xcb_surface_create(conn, drawable,
+ root_visual_type, x + max_width, y + savedFont->height);
+ cairo_t *cr = cairo_create(surface);
+ PangoLayout *layout = pango_cairo_create_layout(cr);
+ pango_layout_set_font_description(layout, savedFont->specific.pango_desc);
+ pango_layout_set_width(layout, max_width * PANGO_SCALE);
+ pango_layout_set_wrap(layout, PANGO_WRAP_CHAR);
+ pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
+
+ /* Do the drawing */
+ cairo_set_source_rgb(cr, pango_font_red, pango_font_green, pango_font_blue);
+ cairo_move_to(cr, x, y);
+ pango_layout_set_text(layout, text, text_len);
+ pango_cairo_update_layout(cr, layout);
+ pango_cairo_show_layout(cr, layout);
+
+ /* Free resources */
+ g_object_unref(layout);
+ cairo_destroy(cr);
+ cairo_surface_destroy(surface);
+}
+
+/*
+ * Calculate the text width using Pango rendering.
+ *
+ */
+static int predict_text_width_pango(const char *text, size_t text_len) {
+ /* Create a dummy Pango layout */
+ /* root_visual_type is cached in load_pango_font */
+ cairo_surface_t *surface = cairo_xcb_surface_create(conn, root_screen->root, root_visual_type, 1, 1);
+ cairo_t *cr = cairo_create(surface);
+ PangoLayout *layout = pango_cairo_create_layout(cr);
+
+ /* Get the font width */
+ gint width;
+ pango_layout_set_font_description(layout, savedFont->specific.pango_desc);
+ pango_layout_set_text(layout, text, text_len);
+ pango_cairo_update_layout(cr, layout);
+ pango_layout_get_pixel_size(layout, &width, NULL);
+
+ /* Free resources */
+ g_object_unref(layout);
+ cairo_destroy(cr);
+ cairo_surface_destroy(surface);
+
+ return width;
+}
+#endif
+
/*
* Loads a font for usage, also getting its metrics. If fallback is true,
* the fonts 'fixed' or '-misc-*' will be loaded instead of exiting.
i3Font font;
font.type = FONT_TYPE_NONE;
+#if PANGO_SUPPORT
+ /* Try to load a pango font if specified */
+ if (strlen(pattern) > strlen("xft:") && !strncmp(pattern, "xft:", strlen("xft:"))) {
+ pattern += strlen("xft:");
+ if (load_pango_font(&font, pattern))
+ return font;
+ }
+#endif
/* Send all our requests first */
font.specific.xcb.id = xcb_generate_id(conn);
free(savedFont->specific.xcb.info);
break;
}
+#if PANGO_SUPPORT
+ case FONT_TYPE_PANGO:
+ /* Free the font description */
+ pango_font_description_free(savedFont->specific.pango_desc);
+ break;
+#endif
default:
assert(false);
break;
xcb_change_gc(conn, gc, mask, values);
break;
}
+#if PANGO_SUPPORT
+ case FONT_TYPE_PANGO:
+ /* Save the foreground font */
+ pango_font_red = ((foreground >> 16) & 0xff) / 255.0;
+ pango_font_green = ((foreground >> 8) & 0xff) / 255.0;
+ pango_font_blue = (foreground & 0xff) / 255.0;
+ break;
+#endif
default:
assert(false);
break;
draw_text_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text),
drawable, gc, x, y, max_width);
break;
+#if PANGO_SUPPORT
+ case FONT_TYPE_PANGO:
+ /* Render the text using Pango */
+ draw_text_pango(i3string_as_utf8(text), i3string_get_num_bytes(text),
+ drawable, x, y, max_width);
+ return;
+#endif
default:
assert(false);
}
}
break;
}
+#if PANGO_SUPPORT
+ case FONT_TYPE_PANGO:
+ /* Render the text using Pango */
+ draw_text_pango(text, strlen(text),
+ drawable, x, y, max_width);
+ return;
+#endif
default:
assert(false);
}
return 0;
case FONT_TYPE_XCB:
return predict_text_width_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text));
+#if PANGO_SUPPORT
+ case FONT_TYPE_PANGO:
+ /* Calculate extents using Pango */
+ return predict_text_width_pango(i3string_as_utf8(text), i3string_get_num_bytes(text));
+#endif
default:
assert(false);
return 0;
projects / i3 / i3 / commitdiff