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libi3: Rework font to support multiple backends

This commit is contained in:
Fernando Tarlá Cardoso Lemos 2011-11-14 21:39:03 -02:00 committed by Quentin Glidic
parent edd9007ebf
commit ec17a26b0e
4 changed files with 125 additions and 51 deletions
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17
include/libi3.h
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@ -33,6 +33,18 @@ typedef struct Font i3Font;
* *
*/ */
struct Font { struct Font {
/** The type of font */
enum {
FONT_TYPE_NONE = 0,
FONT_TYPE_XCB,
FONT_TYPE_PANGO
} type;
/** The height of the font, built from font_ascent + font_descent */
int height;
union {
struct {
/** The xcb-id for the font */ /** The xcb-id for the font */
xcb_font_t id; xcb_font_t id;
@ -41,9 +53,8 @@ struct Font {
/** Font table for this font (may be NULL) */ /** Font table for this font (may be NULL) */
xcb_charinfo_t *table; xcb_charinfo_t *table;
} xcb;
/** The height of the font, built from font_ascent + font_descent */ } specific;
int height;
}; };
/* Since this file also gets included by utilities which don’t use the i3 log /* Since this file also gets included by utilities which don’t use the i3 log

107
libi3/font.c
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@ -24,12 +24,14 @@ static const i3Font *savedFont = NULL;
*/ */
i3Font load_font(const char *pattern, const bool fallback) { i3Font load_font(const char *pattern, const bool fallback) {
i3Font font; i3Font font;
font.type = FONT_TYPE_NONE;
/* Send all our requests first */ /* Send all our requests first */
font.id = xcb_generate_id(conn); font.specific.xcb.id = xcb_generate_id(conn);
xcb_void_cookie_t font_cookie = xcb_open_font_checked(conn, font.id, xcb_void_cookie_t font_cookie = xcb_open_font_checked(conn, font.specific.xcb.id,
strlen(pattern), pattern); strlen(pattern), pattern);
xcb_query_font_cookie_t info_cookie = xcb_query_font(conn, font.id); xcb_query_font_cookie_t info_cookie = xcb_query_font(conn, font.specific.xcb.id);
/* Check for errors. If errors, fall back to default font. */ /* Check for errors. If errors, fall back to default font. */
xcb_generic_error_t *error; xcb_generic_error_t *error;
@ -40,8 +42,9 @@ i3Font load_font(const char *pattern, const bool fallback) {
ELOG("Could not open font %s (X error %d). Trying fallback to 'fixed'.\n", ELOG("Could not open font %s (X error %d). Trying fallback to 'fixed'.\n",
pattern, error->error_code); pattern, error->error_code);
pattern = "fixed"; pattern = "fixed";
font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern); font_cookie = xcb_open_font_checked(conn, font.specific.xcb.id,
info_cookie = xcb_query_font(conn, font.id); strlen(pattern), pattern);
info_cookie = xcb_query_font(conn, font.specific.xcb.id);
/* Check if we managed to open 'fixed' */ /* Check if we managed to open 'fixed' */
error = xcb_request_check(conn, font_cookie); error = xcb_request_check(conn, font_cookie);
@ -50,8 +53,9 @@ i3Font load_font(const char *pattern, const bool fallback) {
if (error != NULL) { if (error != NULL) {
ELOG("Could not open fallback font 'fixed', trying with '-misc-*'.\n"); ELOG("Could not open fallback font 'fixed', trying with '-misc-*'.\n");
pattern = "-misc-*"; pattern = "-misc-*";
font_cookie = xcb_open_font_checked(conn, font.id, strlen(pattern), pattern); font_cookie = xcb_open_font_checked(conn, font.specific.xcb.id,
info_cookie = xcb_query_font(conn, font.id); strlen(pattern), pattern);
info_cookie = xcb_query_font(conn, font.specific.xcb.id);
if ((error = xcb_request_check(conn, font_cookie)) != NULL) if ((error = xcb_request_check(conn, font_cookie)) != NULL)
errx(EXIT_FAILURE, "Could open neither requested font nor fallbacks " errx(EXIT_FAILURE, "Could open neither requested font nor fallbacks "
@ -60,18 +64,20 @@ i3Font load_font(const char *pattern, const bool fallback) {
} }
/* Get information (height/name) for this font */ /* Get information (height/name) for this font */
if (!(font.info = xcb_query_font_reply(conn, info_cookie, NULL))) if (!(font.specific.xcb.info = xcb_query_font_reply(conn, info_cookie, NULL)))
errx(EXIT_FAILURE, "Could not load font \"%s\"", pattern); errx(EXIT_FAILURE, "Could not load font \"%s\"", pattern);
/* Get the font table, if possible */ /* Get the font table, if possible */
if (xcb_query_font_char_infos_length(font.info) == 0) if (xcb_query_font_char_infos_length(font.specific.xcb.info) == 0)
font.table = NULL; font.specific.xcb.table = NULL;
else else
font.table = xcb_query_font_char_infos(font.info); font.specific.xcb.table = xcb_query_font_char_infos(font.specific.xcb.info);
/* Calculate the font height */ /* Calculate the font height */
font.height = font.info->font_ascent + font.info->font_descent; font.height = font.specific.xcb.info->font_ascent + font.specific.xcb.info->font_descent;
/* Set the font type and return successfully */
font.type = FONT_TYPE_XCB;
return font; return font;
} }
@ -88,10 +94,21 @@ void set_font(i3Font *font) {
* *
*/ */
void free_font(void) { void free_font(void) {
switch (savedFont->type) {
case FONT_TYPE_NONE:
/* Nothing to do */
break;
case FONT_TYPE_XCB: {
/* Close the font and free the info */ /* Close the font and free the info */
xcb_close_font(conn, savedFont->id); xcb_close_font(conn, savedFont->specific.xcb.id);
if (savedFont->info) if (savedFont->specific.xcb.info)
free(savedFont->info); free(savedFont->specific.xcb.info);
break;
}
default:
assert(false);
break;
}
} }
/* /*
@ -100,9 +117,22 @@ void free_font(void) {
*/ */
void set_font_colors(xcb_gcontext_t gc, uint32_t foreground, uint32_t background) { void set_font_colors(xcb_gcontext_t gc, uint32_t foreground, uint32_t background) {
assert(savedFont != NULL); assert(savedFont != NULL);
switch (savedFont->type) {
case FONT_TYPE_NONE:
/* Nothing to do */
break;
case FONT_TYPE_XCB: {
/* Change the font and colors in the GC */
uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT; uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
uint32_t values[] = { foreground, background, savedFont->id }; uint32_t values[] = { foreground, background, savedFont->specific.xcb.id };
xcb_change_gc(conn, gc, mask, values); xcb_change_gc(conn, gc, mask, values);
break;
}
default:
assert(false);
break;
}
} }
static int predict_text_width_xcb(const xcb_char2b_t *text, size_t text_len); static int predict_text_width_xcb(const xcb_char2b_t *text, size_t text_len);
@ -110,7 +140,7 @@ static int predict_text_width_xcb(const xcb_char2b_t *text, size_t text_len);
static void draw_text_xcb(const xcb_char2b_t *text, size_t text_len, xcb_drawable_t drawable, static void draw_text_xcb(const xcb_char2b_t *text, size_t text_len, xcb_drawable_t drawable,
xcb_gcontext_t gc, int x, int y, int max_width) { xcb_gcontext_t gc, int x, int y, int max_width) {
/* X11 coordinates for fonts start at the baseline */ /* X11 coordinates for fonts start at the baseline */
int pos_y = y + savedFont->info->font_ascent; int pos_y = y + savedFont->specific.xcb.info->font_ascent;
/* The X11 protocol limits text drawing to 255 chars, so we may need /* The X11 protocol limits text drawing to 255 chars, so we may need
* multiple calls */ * multiple calls */
@ -148,8 +178,17 @@ void draw_text(i3String *text, xcb_drawable_t drawable,
xcb_gcontext_t gc, int x, int y, int max_width) { xcb_gcontext_t gc, int x, int y, int max_width) {
assert(savedFont != NULL); assert(savedFont != NULL);
switch (savedFont->type) {
case FONT_TYPE_NONE:
/* Nothing to do */
return;
case FONT_TYPE_XCB:
draw_text_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text), draw_text_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text),
drawable, gc, x, y, max_width); drawable, gc, x, y, max_width);
break;
default:
assert(false);
}
} }
/* /*
@ -160,6 +199,12 @@ void draw_text_ascii(const char *text, xcb_drawable_t drawable,
xcb_gcontext_t gc, int x, int y, int max_width) { xcb_gcontext_t gc, int x, int y, int max_width) {
assert(savedFont != NULL); assert(savedFont != NULL);
switch (savedFont->type) {
case FONT_TYPE_NONE:
/* Nothing to do */
return;
case FONT_TYPE_XCB:
{
size_t text_len = strlen(text); size_t text_len = strlen(text);
if (text_len > 255) { if (text_len > 255) {
/* The text is too long to draw it directly to X */ /* The text is too long to draw it directly to X */
@ -168,10 +213,15 @@ void draw_text_ascii(const char *text, xcb_drawable_t drawable,
i3string_free(str); i3string_free(str);
} else { } else {
/* X11 coordinates for fonts start at the baseline */ /* X11 coordinates for fonts start at the baseline */
int pos_y = y + savedFont->info->font_ascent; int pos_y = y + savedFont->specific.xcb.info->font_ascent;
xcb_image_text_8(conn, text_len, drawable, gc, x, pos_y, text); xcb_image_text_8(conn, text_len, drawable, gc, x, pos_y, text);
} }
break;
}
default:
assert(false);
}
} }
static int xcb_query_text_width(const xcb_char2b_t *text, size_t text_len) { static int xcb_query_text_width(const xcb_char2b_t *text, size_t text_len) {
@ -185,7 +235,7 @@ static int xcb_query_text_width(const xcb_char2b_t *text, size_t text_len) {
/* Query the text width */ /* Query the text width */
xcb_generic_error_t *error; xcb_generic_error_t *error;
xcb_query_text_extents_cookie_t cookie = xcb_query_text_extents(conn, xcb_query_text_extents_cookie_t cookie = xcb_query_text_extents(conn,
savedFont->id, text_len, (xcb_char2b_t*)text); savedFont->specific.xcb.id, text_len, (xcb_char2b_t*)text);
xcb_query_text_extents_reply_t *reply = xcb_query_text_extents_reply(conn, xcb_query_text_extents_reply_t *reply = xcb_query_text_extents_reply(conn,
cookie, &error); cookie, &error);
if (reply == NULL) { if (reply == NULL) {
@ -193,7 +243,7 @@ static int xcb_query_text_width(const xcb_char2b_t *text, size_t text_len) {
* a crash. Plus, the user will see the error in his log. */ * a crash. Plus, the user will see the error in his log. */
fprintf(stderr, "Could not get text extents (X error code %d)\n", fprintf(stderr, "Could not get text extents (X error code %d)\n",
error->error_code); error->error_code);
return savedFont->info->max_bounds.character_width * text_len; return savedFont->specific.xcb.info->max_bounds.character_width * text_len;
} }
int width = reply->overall_width; int width = reply->overall_width;
@ -206,13 +256,13 @@ static int predict_text_width_xcb(const xcb_char2b_t *input, size_t text_len) {
return 0; return 0;
int width; int width;
if (savedFont->table == NULL) { if (savedFont->specific.xcb.table == NULL) {
/* If we don't have a font table, fall back to querying the server */ /* If we don't have a font table, fall back to querying the server */
width = xcb_query_text_width(input, text_len); width = xcb_query_text_width(input, text_len);
} else { } else {
/* Save some pointers for convenience */ /* Save some pointers for convenience */
xcb_query_font_reply_t *font_info = savedFont->info; xcb_query_font_reply_t *font_info = savedFont->specific.xcb.info;
xcb_charinfo_t *font_table = savedFont->table; xcb_charinfo_t *font_table = savedFont->specific.xcb.table;
/* Calculate the width using the font table */ /* Calculate the width using the font table */
width = 0; width = 0;
@ -251,5 +301,16 @@ static int predict_text_width_xcb(const xcb_char2b_t *input, size_t text_len) {
* *
*/ */
int predict_text_width(i3String *text) { int predict_text_width(i3String *text) {
assert(savedFont != NULL);
switch (savedFont->type) {
case FONT_TYPE_NONE:
/* Nothing to do */
return 0;
case FONT_TYPE_XCB:
return predict_text_width_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text)); return predict_text_width_xcb(i3string_as_ucs2(text), i3string_get_num_glyphs(text));
default:
assert(false);
return 0;
}
} }

2
src/config.c
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@ -394,7 +394,7 @@ void load_configuration(xcb_connection_t *conn, const char *override_configpath,
grab_all_keys(conn, false); grab_all_keys(conn, false);
} }
if (config.font.id == 0) { if (config.font.type == FONT_TYPE_NONE) {
ELOG("You did not specify required configuration option \"font\"\n"); ELOG("You did not specify required configuration option \"font\"\n");
config.font = load_font("fixed", true); config.font = load_font("fixed", true);
set_font(&config.font); set_font(&config.font);

10
src/xcb.c
View File

@ -50,8 +50,9 @@ xcb_window_t create_window(xcb_connection_t *conn, Rect dims,
xcb_cursor_t cursor_id = xcb_generate_id(conn); xcb_cursor_t cursor_id = xcb_generate_id(conn);
i3Font cursor_font = load_font("cursor", false); i3Font cursor_font = load_font("cursor", false);
int xcb_cursor = xcursor_get_xcb_cursor(cursor); int xcb_cursor = xcursor_get_xcb_cursor(cursor);
xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id, xcb_create_glyph_cursor(conn, cursor_id, cursor_font.specific.xcb.id,
xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535); cursor_font.specific.xcb.id, xcb_cursor, xcb_cursor + 1, 0, 0, 0,
65535, 65535, 65535);
xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, &cursor_id); xcb_change_window_attributes(conn, result, XCB_CW_CURSOR, &cursor_id);
xcb_free_cursor(conn, cursor_id); xcb_free_cursor(conn, cursor_id);
} }
@ -195,8 +196,9 @@ void xcb_set_root_cursor(int cursor) {
xcb_cursor_t cursor_id = xcb_generate_id(conn); xcb_cursor_t cursor_id = xcb_generate_id(conn);
i3Font cursor_font = load_font("cursor", false); i3Font cursor_font = load_font("cursor", false);
int xcb_cursor = xcursor_get_xcb_cursor(cursor); int xcb_cursor = xcursor_get_xcb_cursor(cursor);
xcb_create_glyph_cursor(conn, cursor_id, cursor_font.id, cursor_font.id, xcb_create_glyph_cursor(conn, cursor_id, cursor_font.specific.xcb.id,
xcb_cursor, xcb_cursor + 1, 0, 0, 0, 65535, 65535, 65535); cursor_font.specific.xcb.id, xcb_cursor, xcb_cursor + 1, 0, 0, 0,
65535, 65535, 65535);
xcb_change_window_attributes(conn, root, XCB_CW_CURSOR, &cursor_id); xcb_change_window_attributes(conn, root, XCB_CW_CURSOR, &cursor_id);
xcb_free_cursor(conn, cursor_id); xcb_free_cursor(conn, cursor_id);
xcb_flush(conn); xcb_flush(conn);