/* * Copyright © 2010 Behdad Esfahbod * Copyright © 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 */ #include "common.hh" #include #include #include "options.hh" /* 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 cairo_font_face_t *cairo_face; static cairo_glyph_t * _hb_cr_text_glyphs (cairo_t *cr, const char *utf8, 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_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, y; hb_buffer = hb_buffer_create (); if (shape_opts->direction) hb_buffer_set_direction (hb_buffer, hb_direction_from_string (shape_opts->direction)); if (shape_opts->script) hb_buffer_set_script (hb_buffer, hb_script_from_string (shape_opts->script)); if (shape_opts->language) hb_buffer_set_language (hb_buffer, hb_language_from_string (shape_opts->language)); if (len < 0) len = strlen (utf8); hb_buffer_add_utf8 (hb_buffer, utf8, len, 0, len); if (!hb_shape_full (hb_font, hb_buffer, shape_opts->features, shape_opts->num_features, NULL, shape_opts->shapers)) fail ("All shapers failed"); num_glyphs = hb_buffer_get_length (hb_buffer); hb_glyph = hb_buffer_get_glyph_infos (hb_buffer, NULL); hb_position = hb_buffer_get_glyph_positions (hb_buffer, NULL); cairo_glyphs = cairo_glyph_allocate (num_glyphs); x = 0; y = 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 + y) * (1./64); x += hb_position->x_advance; y += -hb_position->y_advance; hb_glyph++; hb_position++; } hb_buffer_destroy (hb_buffer); hb_font_destroy (hb_font); 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 (view_opts->back + (*view_opts->back=='#'), "%2x%2x%2x%2x", &br, &bg, &bb, &ba); fr = fg = fb = 0; fa = 255; sscanf (view_opts->fore + (*view_opts->fore=='#'), "%2x%2x%2x%2x", &fr, &fg, &fb, &fa); if (!view_opts->annotate && 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 = shape_opts->text; double x, y; cr= create_context (); cairo_set_font_size (cr, font_opts->font_size); cairo_font_extents (cr, &font_extents); height = 0; width = 0; x = view_opts->margin.l; y = view_opts->margin.t; do { cairo_text_extents_t extents; end = strchr (p, '\n'); if (!end) end = p + strlen (p); if (p != shape_opts->text) y += view_opts->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); if (view_opts->annotate) { unsigned int i; cairo_save (cr); /* Draw actual glyph origins */ cairo_set_source_rgba (cr, 1., 0., 0., .5); cairo_set_line_width (cr, 5); cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); for (i = 0; i < num_glyphs; i++) { cairo_move_to (cr, glyphs[i].x, glyphs[i].y); cairo_rel_line_to (cr, 0, 0); } cairo_stroke (cr); cairo_restore (cr); } 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 + view_opts->margin.b; width += view_opts->margin.l + view_opts->margin.r; cairo_destroy (cr); } int main (int argc, char **argv) { static FT_Library ft_library; static FT_Face ft_face; cairo_status_t status; setlocale (LC_ALL, ""); parse_options (argc, argv); FT_Init_FreeType (&ft_library); if (FT_New_Face (ft_library, font_opts->font_file, font_opts->face_index, &ft_face)) { fprintf (stderr, "Failed to open font file `%s'\n", font_opts->font_file); exit (1); } cairo_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0); draw (); draw (); status = cairo_surface_write_to_png (surface, out_file); if (status != CAIRO_STATUS_SUCCESS) { fprintf (stderr, "Failed to write output file `%s': %s\n", out_file, cairo_status_to_string (status)); exit (1); } if (debug) { free (shape_opts->features); g_free (shape_opts->shapers); cairo_pattern_destroy (fore_pattern); cairo_pattern_destroy (back_pattern); cairo_surface_destroy (surface); cairo_font_face_destroy (cairo_face); cairo_debug_reset_static_data (); FT_Done_Face (ft_face); FT_Done_FreeType (ft_library); } return 0; }