[hb-view] Add --show-extents
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@ -168,7 +168,8 @@ view_cairo_t::render (const font_options_t *font_opts)
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cairo_translate (cr, -vert * leading, +horiz * leading);
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cairo_translate (cr, -vert * leading, +horiz * leading);
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if (annotate) {
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if (annotate)
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{
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cairo_save (cr);
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cairo_save (cr);
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/* Draw actual glyph origins */
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/* Draw actual glyph origins */
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@ -183,6 +184,28 @@ view_cairo_t::render (const font_options_t *font_opts)
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cairo_restore (cr);
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cairo_restore (cr);
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}
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}
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if (show_extents)
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{
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cairo_save (cr);
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/* Draw actual glyph origins */
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cairo_set_source_rgba (cr, .5, .5, .5, 1.);
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cairo_set_line_width (cr, 2);
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for (unsigned i = 0; i < l.num_glyphs; i++)
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{
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hb_glyph_extents_t hb_extents;
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hb_font_get_glyph_extents (font, l.glyphs[i].index, &hb_extents);
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double x1 = scalbn ((double) hb_extents.x_bearing, - (int) subpixel_bits);
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double y1 = -scalbn ((double) hb_extents.y_bearing, - (int) subpixel_bits);
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double width = scalbn ((double) hb_extents.width, - (int) subpixel_bits);
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double height = -scalbn ((double) hb_extents.height, - (int) subpixel_bits);
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cairo_rectangle (cr, l.glyphs[i].x + x1, l.glyphs[i].y + y1, width, height);
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}
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cairo_stroke (cr);
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cairo_restore (cr);
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}
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if (l.num_clusters)
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if (l.num_clusters)
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cairo_show_text_glyphs (cr,
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cairo_show_text_glyphs (cr,
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@ -57,6 +57,7 @@ struct view_options_t
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struct margin_t {
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struct margin_t {
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double t, r, b, l;
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double t, r, b, l;
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} margin = {DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN};
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} margin = {DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN};
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hb_bool_t show_extents = false;
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};
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};
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@ -116,6 +117,7 @@ view_options_t::add_options (option_parser_t *parser)
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{"line-space", 0, 0, G_OPTION_ARG_DOUBLE, &this->line_space, "Set space between lines (default: 0)", "units"},
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{"line-space", 0, 0, G_OPTION_ARG_DOUBLE, &this->line_space, "Set space between lines (default: 0)", "units"},
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{"font-extents", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_extents, "Set font ascent/descent/line-gap (default: auto)","one to three numbers"},
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{"font-extents", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_extents, "Set font ascent/descent/line-gap (default: auto)","one to three numbers"},
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{"margin", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_margin, "Margin around output (default: " G_STRINGIFY(DEFAULT_MARGIN) ")","one to four numbers"},
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{"margin", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_margin, "Margin around output (default: " G_STRINGIFY(DEFAULT_MARGIN) ")","one to four numbers"},
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{"show-extents", 0, 0, G_OPTION_ARG_NONE, &this->show_extents, "Draw glyph extents", nullptr},
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{nullptr}
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{nullptr}
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};
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};
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parser->add_group (entries,
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parser->add_group (entries,
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