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author | YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp> | 2019-04-24 12:31:37 +0900 |
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committer | YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp> | 2019-04-24 12:31:37 +0900 |
commit | 5f4e8e2e088de9fb76cb631077c6eddd3219f594 (patch) | |
tree | abb80bc8ec36c28d4eef08b92db90a142f641be6 /lwlib/lwlib-utils.c | |
parent | 1828e9a9b7481572448284a8e5925bf97f2145f7 (diff) | |
download | emacs-5f4e8e2e088de9fb76cb631077c6eddd3219f594.tar.gz |
Don't link libXft when using cairo
* configure.ac: Check cairo early. Don't try Xft if cairo is used.
* lwlib/lwlib-utils.h [USE_CAIRO]: Include cairo.h and fontconfig.h.
(XftFont, XftDraw, XftColor, XGlyphInfo) [USE_CAIRO]: New typedefs.
(XftFontOpenName, XftFontClose, XftDrawCreate, XftDrawDestroy)
(XftDrawRect, XftDrawStringUtf8, XftTextExtentsUtf8) [USE_CAIRO]: New macros.
(crxft_font_open_name, crxft_font_close, crxft_draw_create)
(crxft_draw_rect, crxft_draw_string, crxft_text_extents) [USE_CAIRO]: New
externs.
* lwlib/lwlib-utils.c [USE_CAIRO]: Include math.h, cairo-ft.h, and
cairo-xlib.h.
(crxft_font_open_name, crxft_font_close, crxft_draw_create)
(crxft_set_source_color, crxft_draw_rect, crxft_draw_string)
(crxft_text_extents) [USE_CAIRO]: New Xft compatibility functions.
* lwlib/xlwmenuP.h [USE_CAIRO]: Include lwlib-utils.h.
* lwlib/xlwmenu.c (display_menu_item) [USE_CAIRO]: Call
cairo_surface_mark_dirty and cairo_surface_flush.
* lwlib/lwlib-Xaw.c [USE_CAIRO]: Include stdlib.h and lwlib-utils.h.
(draw_text) [USE_CAIRO]: Call cairo_surface_flush.
* src/xsettings.c [USE_CAIRO]: Include fontconfig.h
(apply_xft_settings) [!HAVE_XFT]: Don't call XftDefaultSubstitute or
XftDefaultSet.
* lwlib/lwlib-Xaw.c:
* lwlib/lwlib-int.h:
* lwlib/xlwmenu.c:
* lwlib/xlwmenuP.h:
* src/xrdb.c:
* src/xsettings.c:
* src/xterm.c: Replace all #ifdef HAVE_XFT with #if defined USE_CAIRO ||
defined HAVE_XFT.
* src/xfns.c (x_default_font_parameter): Replace #ifdef HAVE_XFT with #if
defined USE_CAIRO || defined HAVE_XFT.
Diffstat (limited to 'lwlib/lwlib-utils.c')
-rw-r--r-- | lwlib/lwlib-utils.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/lwlib/lwlib-utils.c b/lwlib/lwlib-utils.c index 7c60bdb056d..2c0a931f9cb 100644 --- a/lwlib/lwlib-utils.c +++ b/lwlib/lwlib-utils.c @@ -137,3 +137,143 @@ XtWidgetBeingDestroyedP (Widget widget) { return widget->core.being_destroyed; } + +#ifdef USE_CAIRO +/* Xft emulation on cairo. */ +#include <math.h> +#include <cairo-ft.h> +#include <cairo-xlib.h> + +XftFont * +crxft_font_open_name (Display *dpy, int screen, const char *name) +{ + XftFont *pub = NULL; + FcPattern *pattern = FcNameParse ((FcChar8 *) name); + if (pattern) + { + FcConfigSubstitute (NULL, pattern, FcMatchPattern); + double dpi; + if (FcPatternGetDouble (pattern, FC_DPI, 0, &dpi) == FcResultNoMatch) + { + char *v = XGetDefault (dpy, "Xft", FC_DPI); + if (v == NULL || sscanf (v, "%lf", &dpi) != 1) + dpi = ((DisplayHeight (dpy, screen) * 25.4) + / DisplayHeightMM (dpy, screen)); + FcPatternAddDouble (pattern, FC_DPI, dpi); + } + FcDefaultSubstitute (pattern); + cairo_font_face_t *font_face + = cairo_ft_font_face_create_for_pattern (pattern); + if (font_face) + { + double pixel_size; + if ((FcPatternGetDouble (pattern, FC_PIXEL_SIZE, 0, &pixel_size) + != FcResultMatch) + || pixel_size < 1) + pixel_size = 10; + + pub = xmalloc (sizeof (*pub)); + cairo_matrix_t font_matrix, ctm; + cairo_matrix_init_scale (&font_matrix, pixel_size, pixel_size); + cairo_matrix_init_identity (&ctm); + cairo_font_options_t *options = cairo_font_options_create (); + cairo_ft_font_options_substitute (options, pattern); + pub->scaled_font = cairo_scaled_font_create (font_face, &font_matrix, + &ctm, options); + cairo_font_face_destroy (font_face); + cairo_font_options_destroy (options); + + cairo_font_extents_t extents; + cairo_scaled_font_extents (pub->scaled_font, &extents); + pub->ascent = lround (extents.ascent); + pub->descent = lround (extents.descent); + pub->height = lround (extents.height); + pub->max_advance_width = lround (extents.max_x_advance); + } + FcPatternDestroy (pattern); + } + return pub; +} + +void +crxft_font_close (XftFont *pub) +{ + cairo_scaled_font_destroy (pub->scaled_font); + xfree (pub); +} + +cairo_t * +crxft_draw_create (Display *dpy, Drawable drawable, Visual *visual) +{ + cairo_t *cr = NULL; + Window root; + int x, y; + unsigned int width, height, border_width, depth; + + if (!XGetGeometry (dpy, drawable, &root, &x, &y, &width, &height, + &border_width, &depth)) + return NULL; + + cairo_surface_t *surface = cairo_xlib_surface_create (dpy, drawable, visual, + width, height); + if (surface) + { + cr = cairo_create (surface); + cairo_surface_destroy (surface); + } + + return cr; +} + +static void +crxft_set_source_color (cairo_t *cr, const XftColor *color) +{ + cairo_set_source_rgba (cr, color->color.red / 65535.0, + color->color.green / 65535.0, + color->color.blue / 65535.0, + color->color.alpha / 65535.0); +} + +void +crxft_draw_rect (cairo_t *cr, const XftColor *color, int x, int y, + unsigned int width, unsigned int height) +{ + crxft_set_source_color (cr, color); + cairo_rectangle (cr, x, y, width, height); + cairo_fill (cr); +} + +void +crxft_draw_string (cairo_t *cr, const XftColor *color, XftFont *pub, + int x, int y, const FcChar8 *string, int len) +{ + char *buf = xmalloc (len + 1); + memcpy (buf, string, len); + buf[len] = '\0'; + crxft_set_source_color (cr, color); + cairo_set_scaled_font (cr, pub->scaled_font); + cairo_move_to (cr, x, y); + cairo_show_text (cr, buf); + xfree (buf); +} + +void +crxft_text_extents (XftFont *pub, const FcChar8 *string, int len, + XGlyphInfo *extents) +{ + char *buf = xmalloc (len + 1); + memcpy (buf, string, len); + buf[len] = '\0'; + cairo_text_extents_t text_extents; + cairo_scaled_font_text_extents (pub->scaled_font, buf, &text_extents); + xfree (buf); + extents->x = ceil (- text_extents.x_bearing); + extents->y = ceil (- text_extents.y_bearing); + extents->width = (ceil (text_extents.x_bearing + text_extents.width) + + extents->x); + extents->height = (ceil (text_extents.y_bearing + text_extents.height) + + extents->y); + extents->xOff = lround (text_extents.x_advance); + extents->yOff = lround (text_extents.y_advance); +} +#endif /* USE_CAIRO */ |