[hb-view] Use Chafa for terminal graphics if available
This produces high-quality terminal graphics using symbols or sixels according to the detected terminal capabilities. Fixes #2430.
This commit is contained in:
Hans Petter Jansson
Behdad Esfahbod
parent
425ba1f4ab
commit
8298c2f93b
19
configure.ac
19
configure.ac
@ -214,6 +214,24 @@ AM_CONDITIONAL(HAVE_CAIRO_FT, $have_cairo_ft)
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dnl ==========================================================================
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AC_ARG_WITH(chafa,
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[AS_HELP_STRING([--with-chafa=@<:@yes/no/auto@:>@],
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[Use chafa @<:@default=auto@:>@])],,
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[with_chafa=auto])
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have_chafa=false
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if test "x$with_chafa" = "xyes" -o "x$with_chafa" = "xauto"; then
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PKG_CHECK_MODULES(CHAFA, chafa >= 1.6.0, have_chafa=true, :)
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fi
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if test "x$with_chafa" = "xyes" -a "x$have_chafa" != "xtrue"; then
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AC_MSG_ERROR([chafa support requested but not found])
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fi
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if $have_chafa; then
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AC_DEFINE(HAVE_CHAFA, 1, [Have chafa terminal graphics library])
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fi
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AM_CONDITIONAL(HAVE_CHAFA, $have_chafa)
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dnl ==========================================================================
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AC_ARG_WITH(icu,
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[AS_HELP_STRING([--with-icu=@<:@yes/no/builtin/auto@:>@],
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[Use ICU @<:@default=auto@:>@])],,
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@ -448,6 +466,7 @@ Font callbacks (the more the merrier):
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Tools used for command-line utilities:
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Cairo: ${have_cairo}
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Chafa: ${have_chafa}
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Additional shapers:
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Graphite2: ${have_graphite2}
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@ -154,6 +154,8 @@ if not get_option('cairo').disabled()
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endif
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endif
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chafa_dep = dependency('chafa', version: '>= 1.6.0', required: get_option('chafa'))
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conf = configuration_data()
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incconfig = include_directories('.')
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@ -181,6 +183,10 @@ if cairo_ft_dep.found()
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conf.set('HAVE_CAIRO_FT', 1)
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endif
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if chafa_dep.found()
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conf.set('HAVE_CHAFA', 1)
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endif
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if graphite2_dep.found()
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conf.set('HAVE_GRAPHITE2', 1)
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endif
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@ -363,6 +369,7 @@ build_summary = {
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},
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'Dependencies used for command-line utilities':
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{'Cairo': conf.get('HAVE_CAIRO', 0) == 1,
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'Chafa': conf.get('HAVE_CHAFA', 0) == 1,
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},
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'Additional shapers':
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{'Graphite2': conf.get('HAVE_GRAPHITE2', 0) == 1,
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@ -5,6 +5,8 @@ option('gobject', type: 'feature', value: 'auto',
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description: 'Enable GObject bindings')
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option('cairo', type: 'feature', value: 'auto',
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description: 'Use Cairo graphics library')
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option('chafa', type: 'feature', value: 'auto',
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description: 'Use Chafa terminal graphics library')
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option('icu', type: 'feature', value: 'auto',
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description: 'Enable ICU library unicode functions')
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option('graphite', type: 'feature', value: 'disabled',
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@ -25,6 +25,7 @@ AM_CPPFLAGS = \
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$(GLIB_CFLAGS) \
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$(FREETYPE_CFLAGS) \
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$(CAIRO_FT_CFLAGS) \
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$(CHAFA_CFLAGS) \
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$(NULL)
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LDADD = \
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$(top_builddir)/src/libharfbuzz.la \
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@ -42,6 +43,7 @@ hb_view_LDADD = \
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$(LDADD) \
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$(CAIRO_LIBS) \
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$(CAIRO_FT_LIBS) \
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$(CHAFA_LIBS) \
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$(NULL)
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bin_PROGRAMS += hb-view
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endif # HAVE_CAIRO_FT
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@ -26,9 +26,102 @@
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#include "helper-cairo-ansi.hh"
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#include "options.hh"
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#include "ansi-print.hh"
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#ifdef HAVE_CHAFA
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# include <chafa.h>
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/* Similar to ansi-print.cc */
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# define CELL_W 8
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# define CELL_H (2 * CELL_W)
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static void
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chafa_print_image_rgb24 (const void *data, int width, int height, int stride)
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{
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ChafaTermInfo *term_info;
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ChafaSymbolMap *symbol_map;
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ChafaCanvasConfig *config;
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ChafaCanvas *canvas;
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GString *gs;
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unsigned int cols = (width + CELL_W - 1) / CELL_W;
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unsigned int rows = (height + CELL_H - 1) / CELL_H;
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gchar **environ;
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ChafaCanvasMode mode;
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ChafaPixelMode pixel_mode;
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/* Adapt to terminal; use sixels if available, and fall back to symbols
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* with as many colors as are supported */
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environ = g_get_environ ();
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term_info = chafa_term_db_detect (chafa_term_db_get_default (),
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environ);
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pixel_mode = CHAFA_PIXEL_MODE_SYMBOLS;
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if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_BEGIN_SIXELS))
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{
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pixel_mode = CHAFA_PIXEL_MODE_SIXELS;
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mode = CHAFA_CANVAS_MODE_TRUECOLOR;
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}
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else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_DIRECT))
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mode = CHAFA_CANVAS_MODE_TRUECOLOR;
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else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_256))
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mode = CHAFA_CANVAS_MODE_INDEXED_240;
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else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_16))
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mode = CHAFA_CANVAS_MODE_INDEXED_16;
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else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_INVERT_COLORS))
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mode = CHAFA_CANVAS_MODE_FGBG_BGFG;
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else
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mode = CHAFA_CANVAS_MODE_FGBG;
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/* Create the configuration */
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symbol_map = chafa_symbol_map_new ();
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chafa_symbol_map_add_by_tags (symbol_map,
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(ChafaSymbolTags) (CHAFA_SYMBOL_TAG_BLOCK
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| CHAFA_SYMBOL_TAG_SPACE));
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config = chafa_canvas_config_new ();
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chafa_canvas_config_set_canvas_mode (config, mode);
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chafa_canvas_config_set_pixel_mode (config, pixel_mode);
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chafa_canvas_config_set_cell_geometry (config, 10, 20);
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chafa_canvas_config_set_geometry (config, cols, rows);
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chafa_canvas_config_set_symbol_map (config, symbol_map);
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chafa_canvas_config_set_color_extractor (config, CHAFA_COLOR_EXTRACTOR_MEDIAN);
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chafa_canvas_config_set_work_factor (config, 1.0f);
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/* Create canvas, draw to it and render output string */
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canvas = chafa_canvas_new (config);
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chafa_canvas_draw_all_pixels (canvas,
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/* Cairo byte order is host native */
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G_BYTE_ORDER == G_LITTLE_ENDIAN
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? CHAFA_PIXEL_BGRA8_PREMULTIPLIED
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: CHAFA_PIXEL_ARGB8_PREMULTIPLIED,
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(const guint8 *) data,
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width,
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height,
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stride);
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gs = chafa_canvas_print (canvas, term_info);
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/* Print the string */
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fwrite (gs->str, sizeof (char), gs->len, stdout);
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if (pixel_mode != CHAFA_PIXEL_MODE_SIXELS)
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fputc ('\n', stdout);
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/* Free resources */
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g_string_free (gs, TRUE);
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chafa_canvas_unref (canvas);
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chafa_canvas_config_unref (config);
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chafa_symbol_map_unref (symbol_map);
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chafa_term_info_unref (term_info);
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g_strfreev (environ);
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}
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#endif /* HAVE_CHAFA */
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cairo_status_t
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helper_cairo_surface_write_to_ansi_stream (cairo_surface_t *surface,
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@ -95,7 +188,14 @@ helper_cairo_surface_write_to_ansi_stream (cairo_surface_t *surface,
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height++; /* Add one last blank row for padding. */
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if (width && height)
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{
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#ifdef HAVE_CHAFA
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if (true)
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chafa_print_image_rgb24 (data, width, height, stride);
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else
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#endif
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ansi_print_image_rgb24 (data, width, height, stride / 4);
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}
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cairo_surface_destroy (surface);
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return CAIRO_STATUS_SUCCESS;
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@ -31,7 +31,7 @@ if conf.get('HAVE_GLIB', 0) == 1
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hb_view = executable('hb-view', hb_view_sources,
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cpp_args: cpp_args,
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include_directories: [incconfig, incsrc],
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dependencies: util_deps,
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dependencies: [util_deps, chafa_dep],
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link_with: [libharfbuzz],
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install: true,
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)
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