From 5353bf439c150492708ef9337078cfd73b83627b Mon Sep 17 00:00:00 2001 From: Behdad Esfahbod Date: Tue, 22 Feb 2011 18:06:19 -0500 Subject: [PATCH] Add initial hb-view tool Currently doesn't handle script or direction. --- configure.ac | 18 +++ src/Makefile.am | 14 ++ src/hb-view.c | 342 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 374 insertions(+) create mode 100644 src/hb-view.c diff --git a/configure.ac b/configure.ac index 5ea1c7938..3e83a3843 100644 --- a/configure.ac +++ b/configure.ac @@ -37,6 +37,24 @@ if $have_glib; then fi AM_CONDITIONAL(HAVE_GLIB, $have_glib) +PKG_CHECK_MODULES(CAIRO, cairo >= 1.8.0, have_cairo=true, have_cairo=false) +if $have_cairo; then + AC_DEFINE(HAVE_CAIRO, 1, [Have cairo graphics library]) +fi +AM_CONDITIONAL(HAVE_CAIRO, $have_cairo) + +PKG_CHECK_MODULES(CAIRO_PNG, cairo-png, have_cairo_png=true, have_cairo_png=false) +if $have_cairo_png; then + AC_DEFINE(HAVE_CAIRO_PNG, 1, [Have cairo-png support in cairo graphics library]) +fi +AM_CONDITIONAL(HAVE_CAIRO_PNG, $have_cairo_png) + +PKG_CHECK_MODULES(CAIRO_FT, cairo-ft, have_cairo_ft=true, have_cairo_ft=false) +if $have_cairo_ft; then + AC_DEFINE(HAVE_CAIRO_FT, 1, [Have cairo-ft support in cairo graphics library]) +fi +AM_CONDITIONAL(HAVE_CAIRO_FT, $have_cairo_ft) + PKG_CHECK_MODULES(ICU, icu, have_icu=true, [ AC_CHECK_PROG([have_icu], [icu-config], [true], [false]) if $have_icu; then diff --git a/src/Makefile.am b/src/Makefile.am index 751465d7a..8e8319f88 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -110,6 +110,20 @@ GENERATORS = \ EXTRA_DIST += $(GENERATORS) noinst_PROGRAMS = main test +bin_PROGRAMS = + +if HAVE_GLIB +if HAVE_FREETYPE +if HAVE_CAIRO_FT +if HAVE_CAIRO_PNG +hb_view_SOURCES = hb-view.c +hb_view_CPPFLAGS = $(HBCFLAGS) $(CAIRO_FT_CFLAGS) $(CAIRO_PNG_CFLAGS) +hb_view_LDADD = libharfbuzz.la $(HBLIBS) $(CAIRO_FT_LIBS) $(CAIRO_PNG_LIBS) +bin_PROGRAMS += hb-view +endif +endif +endif +endif main_SOURCES = main.cc main_CPPFLAGS = $(HBCFLAGS) diff --git a/src/hb-view.c b/src/hb-view.c new file mode 100644 index 000000000..c55c423cb --- /dev/null +++ b/src/hb-view.c @@ -0,0 +1,342 @@ +/* + * Copyright (C) 2010 Behdad Esfahbod + * Copyright (C) 2011 Google, Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Google Author(s): Behdad Esfahbod + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +/* Controlled by cmd-line options */ +static int margin_t = 10; +static int margin_b = 10; +static int margin_l = 10; +static int margin_r = 10; +static int line_space = 0; +static double font_size = 18; +static const char *fore = "#000000"; +static const char *back = "#000000"; +static const char *text = NULL; +static const char *font_file = NULL; +static const char *out_file = "/dev/stdout"; +static const char *language = NULL; + +/* Ugh, global vars. Ugly, but does the job */ +static int width = 0; +static int height = 0; +static cairo_surface_t *surface = NULL; +static cairo_pattern_t *fore_pattern = NULL; +static cairo_pattern_t *back_pattern = NULL; +static FT_Library ft_library; +static FT_Face ft_face; +static cairo_font_face_t *cairo_face; + + +G_GNUC_NORETURN static void +usage (FILE *f, int status) +{ + fprintf (f, "usage: hb-view [OPTS...] font-file text\n"); + exit (status); +} + +G_GNUC_NORETURN static void +version (void) +{ + printf ("hb-view (harfbuzz) %s\n", PACKAGE_VERSION); + exit (0); +} + +static void +parse_opts (int argc, char **argv) +{ + argv[0] = (char *) "hb-view"; + while (1) + { + int option_index = 0, c; + static struct option long_options[] = { + {"help", 0, 0, 'h'}, + {"version", 0, 0, 'v'}, + {"margin", 1, 0, 'm'}, + {"line-space", 1, 0, 'l'}, + {"font-size", 1, 0, 's'}, + {"foreground", 1, 0, 'F'}, + {"background", 1, 0, 'B'}, + {"language", 1, 0, 'L'}, + {"output", 1, 0, 'o'}, + {0, 0, 0, 0} + }; + + c = getopt_long (argc, argv, "", long_options, &option_index); + if (c == -1) + break; + + switch (c) + { + case 0: + break; + case 'h': + usage (stdout, 0); + break; + case 'v': + version (); + break; + case 'l': + line_space = atoi (optarg); + break; + case 'm': + switch (sscanf (optarg, "%d %d %d %d", &margin_t, &margin_r, &margin_b, &margin_l)) { + case 1: margin_r = margin_t; + case 2: margin_b = margin_t; + case 3: margin_l = margin_r; + } + break; + case 's': + font_size = strtod (optarg, NULL); + break; + case 'f': + font_file = optarg; + break; + case 'F': + fore = optarg; + break; + case 'B': + back = optarg; + break; + case 't': + text = optarg; + break; + case 'L': + language = optarg; + break; + case 'o': + out_file = optarg; + break; + case '?': + usage (stdout, 1); + break; + default: + break; + } + } + if (optind + 2 != argc) + usage (stderr, 1); + font_file = argv[optind++]; + text = argv[optind++]; +} + + + +static cairo_glyph_t * +_hb_cr_text_glyphs (cairo_t *cr, + const char *text, int len, + unsigned int *pnum_glyphs) +{ + cairo_scaled_font_t *scaled_font = cairo_get_scaled_font (cr); + FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font); + hb_face_t *hb_face = hb_ft_face_create (ft_face, NULL); + hb_font_t *hb_font = hb_ft_font_create (ft_face, NULL); + hb_buffer_t *hb_buffer; + cairo_glyph_t *cairo_glyphs; + hb_glyph_info_t *hb_glyph; + hb_glyph_position_t *hb_position; + unsigned int num_glyphs, i; + hb_position_t x; + + if (len < 0) + len = strlen (text); + hb_buffer = hb_buffer_create (len); + + hb_buffer_set_unicode_funcs (hb_buffer, hb_glib_get_unicode_funcs ()); + + hb_buffer_add_utf8 (hb_buffer, text, len, 0, len); + /* hb_buffer_set_script (hb_buffer, HB_SCRIPT_LATIN); */ + /* hb_buffer_set_direction (hb_buffer, HB_DIRECTION_LTR); */ + hb_buffer_set_language (hb_buffer, hb_language_from_string (language)); + + hb_shape (hb_font, hb_face, hb_buffer, NULL, 0); + + num_glyphs = hb_buffer_get_length (hb_buffer); + hb_glyph = hb_buffer_get_glyph_infos (hb_buffer); + hb_position = hb_buffer_get_glyph_positions (hb_buffer); + cairo_glyphs = cairo_glyph_allocate (num_glyphs + 1); + x = 0; + for (i = 0; i < num_glyphs; i++) + { + cairo_glyphs[i].index = hb_glyph->codepoint; + cairo_glyphs[i].x = (hb_position->x_offset + x) * (1./64); + cairo_glyphs[i].y = -(hb_position->y_offset) * (1./64); + x += hb_position->x_advance; + + hb_glyph++; + hb_position++; + } + cairo_glyphs[i].x = x * (1./64); + hb_buffer_destroy (hb_buffer); + hb_font_destroy (hb_font); + hb_face_destroy (hb_face); + cairo_ft_scaled_font_unlock_face (scaled_font); + + if (pnum_glyphs) + *pnum_glyphs = num_glyphs; + return cairo_glyphs; +} + +static cairo_t * +create_context (void) +{ + cairo_t *cr; + unsigned int fr, fg, fb, fa, br, bg, bb, ba; + + if (surface) + cairo_surface_destroy (surface); + if (back_pattern) + cairo_pattern_destroy (back_pattern); + if (fore_pattern) + cairo_pattern_destroy (fore_pattern); + + br = bg = bb = ba = 255; + sscanf (back + (*back=='#'), "%2x%2x%2x%2x", &br, &bg, &bb, &ba); + fr = fg = fb = 0; fa = 255; + sscanf (fore + (*fore=='#'), "%2x%2x%2x%2x", &fr, &fg, &fb, &fa); + + if (ba == 255 && fa == 255 && br == bg && bg == bb && fr == fg && fg == fb) { + /* grayscale. use A8 surface */ + surface = cairo_image_surface_create (CAIRO_FORMAT_A8, width, height); + cr = cairo_create (surface); + cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); + cairo_set_source_rgba (cr, 1., 1., 1., br / 255.); + cairo_paint (cr); + back_pattern = cairo_pattern_reference (cairo_get_source (cr)); + cairo_set_source_rgba (cr, 1., 1., 1., fr / 255.); + fore_pattern = cairo_pattern_reference (cairo_get_source (cr)); + } else { + /* color. use (A)RGB surface */ + if (ba != 255) + surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height); + else + surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height); + cr = cairo_create (surface); + cairo_set_source_rgba (cr, br / 255., bg / 255., bb / 255., ba / 255.); + cairo_paint (cr); + back_pattern = cairo_pattern_reference (cairo_get_source (cr)); + cairo_set_source_rgba (cr, fr / 255., fg / 255., fb / 255., fa / 255.); + fore_pattern = cairo_pattern_reference (cairo_get_source (cr)); + } + + cairo_set_font_face (cr, cairo_face); + + return cr; +} + +static void +draw (void) +{ + cairo_t *cr; + cairo_font_extents_t font_extents; + + cairo_glyph_t *glyphs = NULL; + unsigned int num_glyphs = 0; + + const char *end, *p = text; + double x, y; + + cr= create_context (); + + cairo_set_font_size (cr, font_size); + cairo_font_extents (cr, &font_extents); + + height = 0; + width = 0; + + x = margin_l; + y = margin_t; + + do { + cairo_text_extents_t extents; + + end = strchr (p, '\n'); + if (!end) + end = p + strlen (p); + + if (p != text) + y += line_space; + + if (p != end) { + glyphs = _hb_cr_text_glyphs (cr, p, end - p, &num_glyphs); + cairo_glyph_extents (cr, glyphs, num_glyphs, &extents); + + y += ceil (font_extents.ascent); + width = MAX (width, extents.x_advance); + cairo_save (cr); + cairo_translate (cr, x, y); + cairo_show_glyphs (cr, glyphs, num_glyphs); + cairo_restore (cr); + y += ceil (font_extents.height - ceil (font_extents.ascent)); + cairo_glyph_free (glyphs); + } + + p = end + 1; + } while (*end); + + height = y + margin_b; + width += margin_l + margin_r; + + cairo_destroy (cr); +} + + + +int +main (int argc, char **argv) +{ + parse_opts (argc, argv); + + FT_Init_FreeType (&ft_library); + if (FT_New_Face (ft_library, font_file, 0, &ft_face)) { + fprintf (stderr, "Failed to open font file `%s'\n", font_file); + exit (1); + } + cairo_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0); + + draw (); + draw (); + + cairo_surface_write_to_png (surface, out_file); + + return 0; +}