helper-cairo.cc revision 6c0ebd02c99e7536975ba7194832a1f33abd7faf
14ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin/* 24ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * Copyright © 2011 Google, Inc. 34ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * 44ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * This is part of HarfBuzz, a text shaping library. 54ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * 64ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * Permission is hereby granted, without written agreement and without 74ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * license or royalty fees, to use, copy, modify, and distribute this 84ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * software and its documentation for any purpose, provided that the 94ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * above copyright notice and the following two paragraphs appear in 104ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * all copies of this software. 114ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * 124ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 134ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 144ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 154ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 164ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * DAMAGE. 174ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * 184ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 194ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 204ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 214ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 224ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 234ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * 244ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin * Google Author(s): Behdad Esfahbod 254ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin */ 264ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 274ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#include "helper-cairo.hh" 284ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 294ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#include <cairo-ft.h> 304ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#include <hb-ft.h> 314ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 324ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#include "helper-cairo-ansi.hh" 334ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#ifdef CAIRO_HAS_SVG_SURFACE 344ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin# include <cairo-svg.h> 354ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#endif 364ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#ifdef CAIRO_HAS_PDF_SURFACE 374ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin# include <cairo-pdf.h> 384ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#endif 394ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#ifdef CAIRO_HAS_PS_SURFACE 404ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin# include <cairo-ps.h> 414ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin# if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1,6,0) 424ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin# define HAS_EPS 1 434ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 444ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levinstatic cairo_surface_t * 454ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin_cairo_eps_surface_create_for_stream (cairo_write_func_t write_func, 464ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin void *closure, 474ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin double width, 484ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin double height) 49a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin{ 504ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_surface_t *surface; 514ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 52a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin surface = cairo_ps_surface_create_for_stream (write_func, closure, width, height); 534ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_ps_surface_set_eps (surface, true); 544cee0af77b0275740f7f97ae5d778f60d5ac7f88Dmitry V. Levin 55a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin return surface; 564ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin} 574ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 58a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin# else 594ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin# undef HAS_EPS 604ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin# endif 61a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin#endif 624ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 634ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 64a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinstatic FT_Library ft_library; 654ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 664ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levinstatic inline 67a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinvoid free_ft_library (void) 684ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin{ 694ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin FT_Done_FreeType (ft_library); 70a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin} 714ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 724ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levincairo_scaled_font_t * 73a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinhelper_cairo_create_scaled_font (const font_options_t *font_opts) 744ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin{ 754ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin hb_font_t *font = hb_font_reference (font_opts->get_font ()); 76a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 774ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_font_face_t *cairo_face; 784ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin FT_Face ft_face = hb_ft_font_get_face (font); 79a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (!ft_face) 80a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin { 81a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (!ft_library) 82a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin { 83a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin FT_Init_FreeType (&ft_library); 84a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin#ifdef HAVE_ATEXIT 85a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin atexit (free_ft_library); 864ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#endif 874ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin } 880ed617bd66624cec6138102545d73b2e2346f1f6Dmitry V. Levin FT_New_Face (ft_library, 894ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin font_opts->font_file, 904ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin font_opts->face_index, 91a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin &ft_face); 924ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin } 934ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin if (!ft_face) 944ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin { 9560fe8c139c6f2febefe595781812ddf0864a6ab8Denys Vlasenko /* This allows us to get some boxes at least... */ 96be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin cairo_face = cairo_toy_font_face_create ("@cairo:sans", 974ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin CAIRO_FONT_SLANT_NORMAL, 98a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin CAIRO_FONT_WEIGHT_NORMAL); 99be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin } 1004ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin else 101a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0); 1020a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin cairo_matrix_t ctm, font_matrix; 1030a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin cairo_font_options_t *font_options; 1040a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin 1050a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin cairo_matrix_init_identity (&ctm); 1060a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin cairo_matrix_init_scale (&font_matrix, 1070a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin font_opts->font_size_x, 1080a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin font_opts->font_size_y); 109a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin font_options = cairo_font_options_create (); 1100a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE); 111a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF); 1124ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 1134ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_scaled_font_t *scaled_font = cairo_scaled_font_create (cairo_face, 1144ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin &font_matrix, 115a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin &ctm, 1164ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin font_options); 1174ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 118be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin cairo_font_options_destroy (font_options); 1194ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_font_face_destroy (cairo_face); 1204ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 121a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin static cairo_user_data_key_t key; 1224ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin if (cairo_scaled_font_set_user_data (scaled_font, 1234ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin &key, 124be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin (void *) font, 1254ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin (cairo_destroy_func_t) hb_font_destroy)) 1264ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin hb_font_destroy (font); 127a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 128a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin return scaled_font; 1294ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin} 1304ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 131a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinbool 1324ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levinhelper_cairo_scaled_font_has_color (cairo_scaled_font_t *scaled_font) 133a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin{ 134a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin bool ret = false; 135a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin#ifdef FT_HAS_COLOR 136a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font); 137a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (ft_face) 1384ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin { 1394ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin if (FT_HAS_COLOR (ft_face)) 140be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin ret = true; 1414ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_ft_scaled_font_unlock_face (scaled_font); 1424ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin } 1434ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#endif 1444ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin return ret; 145a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin} 146a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 147a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 148a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinstruct finalize_closure_t { 1494ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin void (*callback)(finalize_closure_t *); 1504ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_surface_t *surface; 151be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin cairo_write_func_t write_func; 1524ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin void *closure; 1534ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin}; 1544ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levinstatic cairo_user_data_key_t finalize_closure_key; 1554ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 156a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 157a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinstatic void 158a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinfinalize_ansi (finalize_closure_t *closure) 159a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin{ 1604ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_status_t status; 1614ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin status = helper_cairo_surface_write_to_ansi_stream (closure->surface, 162be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin closure->write_func, 1634ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin closure->closure); 1644ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin if (status != CAIRO_STATUS_SUCCESS) 165a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin fail (false, "Failed to write output: %s", 166a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_status_to_string (status)); 167a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin} 1682479ef0bceaa35ea353fd0ea372cf31d5eb8a216Dmitry V. Levin 1694ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levinstatic cairo_surface_t * 1704ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin_cairo_ansi_surface_create_for_stream (cairo_write_func_t write_func, 171be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin void *closure, 1724ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin double width, 173a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin double height, 174a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_content_t content) 175a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin{ 1762479ef0bceaa35ea353fd0ea372cf31d5eb8a216Dmitry V. Levin cairo_surface_t *surface; 1774ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin int w = ceil (width); 1784ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin int h = ceil (height); 17925caa318eedf38200cd7660320d95bf4662c6c5bDmitry V. Levin 180a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin switch (content) { 1814ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin case CAIRO_CONTENT_ALPHA: 182a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin surface = cairo_image_surface_create (CAIRO_FORMAT_A8, w, h); 183a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin break; 184a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin default: 185a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin case CAIRO_CONTENT_COLOR: 1864ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, w, h); 1875bd67c86a93c658d258348e8f14af94fd45cbeb6Denys Vlasenko break; 1884ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin case CAIRO_CONTENT_COLOR_ALPHA: 189a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h); 1904ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin break; 1914ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin } 192a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_status_t status = cairo_surface_status (surface); 193a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (status != CAIRO_STATUS_SUCCESS) 194a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin fail (false, "Failed to create cairo surface: %s", 1954ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_status_to_string (status)); 1964ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 197a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin finalize_closure_t *ansi_closure = g_new0 (finalize_closure_t, 1); 1984ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin ansi_closure->callback = finalize_ansi; 199a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin ansi_closure->surface = surface; 200a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin ansi_closure->write_func = write_func; 201a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin ansi_closure->closure = closure; 2024ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 203a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (cairo_surface_set_user_data (surface, 204a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin &finalize_closure_key, 205a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin (void *) ansi_closure, 206a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin (cairo_destroy_func_t) g_free)) 20761d62cf9481f100f76f1e8a2dfe131f638566633Denys Vlasenko g_free ((void *) closure); 20861d62cf9481f100f76f1e8a2dfe131f638566633Denys Vlasenko 20961d62cf9481f100f76f1e8a2dfe131f638566633Denys Vlasenko return surface; 21061d62cf9481f100f76f1e8a2dfe131f638566633Denys Vlasenko} 21161d62cf9481f100f76f1e8a2dfe131f638566633Denys Vlasenko 2124ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 2134ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin#ifdef CAIRO_HAS_PNG_FUNCTIONS 214be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin 215a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinstatic void 216a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinfinalize_png (finalize_closure_t *closure) 217a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin{ 218a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_status_t status; 219a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin status = cairo_surface_write_to_png_stream (closure->surface, 220a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin closure->write_func, 2214ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin closure->closure); 222a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (status != CAIRO_STATUS_SUCCESS) 223be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin fail (false, "Failed to write output: %s", 2244ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin cairo_status_to_string (status)); 2254ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin} 2264ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 227a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levinstatic cairo_surface_t * 228a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin_cairo_png_surface_create_for_stream (cairo_write_func_t write_func, 229a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin void *closure, 230a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin double width, 231a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin double height, 232a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_content_t content) 233a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin{ 234a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_surface_t *surface; 235a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin int w = ceil (width); 236a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin int h = ceil (height); 237a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 238a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin switch (content) { 2394ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin case CAIRO_CONTENT_ALPHA: 240a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin surface = cairo_image_surface_create (CAIRO_FORMAT_A8, w, h); 241a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin break; 2420a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin default: 243a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin case CAIRO_CONTENT_COLOR: 244a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, w, h); 245a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin break; 246a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin case CAIRO_CONTENT_COLOR_ALPHA: 247a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h); 248a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin break; 2490a870586405ef425760d7681d5ac092bb022365eDmitry V. Levin } 250a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_status_t status = cairo_surface_status (surface); 251a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (status != CAIRO_STATUS_SUCCESS) 252a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin fail (false, "Failed to create cairo surface: %s", 253a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin cairo_status_to_string (status)); 254a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 2554ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin finalize_closure_t *png_closure = g_new0 (finalize_closure_t, 1); 256be284cae112d71a0073e24b34e16a63f31b32fd8Dmitry V. Levin png_closure->callback = finalize_png; 2575b88608b296c44c67ffa25900b8c2e496c2b41a4Mike Frysinger png_closure->surface = surface; 2585b88608b296c44c67ffa25900b8c2e496c2b41a4Mike Frysinger png_closure->write_func = write_func; 259a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin png_closure->closure = closure; 260a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 261a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (cairo_surface_set_user_data (surface, 262a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin &finalize_closure_key, 263a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin (void *) png_closure, 264a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin (cairo_destroy_func_t) g_free)) 265a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin g_free ((void *) closure); 266a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 267a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin return surface; 268a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin} 269a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 2705b88608b296c44c67ffa25900b8c2e496c2b41a4Mike Frysinger#endif 271a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 2725b88608b296c44c67ffa25900b8c2e496c2b41a4Mike Frysingerstatic cairo_status_t 2735b88608b296c44c67ffa25900b8c2e496c2b41a4Mike Frysingerstdio_write_func (void *closure, 274a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin const unsigned char *data, 275a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin unsigned int size) 276a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin{ 2774ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin FILE *fp = (FILE *) closure; 2784ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin 2794ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin while (size) { 280a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin size_t ret = fwrite (data, 1, size, fp); 281a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin size -= ret; 282a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin data += ret; 283a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin if (size && ferror (fp)) 2844ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin fail (false, "Failed to write output: %s", strerror (errno)); 285a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin } 286a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 287a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin return CAIRO_STATUS_SUCCESS; 2884ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levin} 289a0beac15389aa69135ce8f968c7f4e20e455940dDmitry V. Levin 2904ef6db489a8a51ae03ffb78b58c679162a39f3c3Dmitry V. Levinconst char *helper_cairo_supported_formats[] = 291{ 292 "ansi", 293 #ifdef CAIRO_HAS_PNG_FUNCTIONS 294 "png", 295 #endif 296 #ifdef CAIRO_HAS_SVG_SURFACE 297 "svg", 298 #endif 299 #ifdef CAIRO_HAS_PDF_SURFACE 300 "pdf", 301 #endif 302 #ifdef CAIRO_HAS_PS_SURFACE 303 "ps", 304 #ifdef HAS_EPS 305 "eps", 306 #endif 307 #endif 308 NULL 309}; 310 311cairo_t * 312helper_cairo_create_context (double w, double h, 313 view_options_t *view_opts, 314 output_options_t *out_opts, 315 cairo_content_t content) 316{ 317 cairo_surface_t *(*constructor) (cairo_write_func_t write_func, 318 void *closure, 319 double width, 320 double height) = NULL; 321 cairo_surface_t *(*constructor2) (cairo_write_func_t write_func, 322 void *closure, 323 double width, 324 double height, 325 cairo_content_t content) = NULL; 326 327 const char *extension = out_opts->output_format; 328 if (!extension) { 329#if HAVE_ISATTY 330 if (isatty (fileno (out_opts->get_file_handle ()))) 331 extension = "ansi"; 332 else 333#endif 334 { 335#ifdef CAIRO_HAS_PNG_FUNCTIONS 336 extension = "png"; 337#else 338 extension = "ansi"; 339#endif 340 } 341 } 342 if (0) 343 ; 344 else if (0 == strcasecmp (extension, "ansi")) 345 constructor2 = _cairo_ansi_surface_create_for_stream; 346 #ifdef CAIRO_HAS_PNG_FUNCTIONS 347 else if (0 == strcasecmp (extension, "png")) 348 constructor2 = _cairo_png_surface_create_for_stream; 349 #endif 350 #ifdef CAIRO_HAS_SVG_SURFACE 351 else if (0 == strcasecmp (extension, "svg")) 352 constructor = cairo_svg_surface_create_for_stream; 353 #endif 354 #ifdef CAIRO_HAS_PDF_SURFACE 355 else if (0 == strcasecmp (extension, "pdf")) 356 constructor = cairo_pdf_surface_create_for_stream; 357 #endif 358 #ifdef CAIRO_HAS_PS_SURFACE 359 else if (0 == strcasecmp (extension, "ps")) 360 constructor = cairo_ps_surface_create_for_stream; 361 #ifdef HAS_EPS 362 else if (0 == strcasecmp (extension, "eps")) 363 constructor = _cairo_eps_surface_create_for_stream; 364 #endif 365 #endif 366 367 368 unsigned int fr, fg, fb, fa, br, bg, bb, ba; 369 const char *color; 370 br = bg = bb = 0; ba = 255; 371 color = view_opts->back ? view_opts->back : DEFAULT_BACK; 372 sscanf (color + (*color=='#'), "%2x%2x%2x%2x", &br, &bg, &bb, &ba); 373 fr = fg = fb = 0; fa = 255; 374 color = view_opts->fore ? view_opts->fore : DEFAULT_FORE; 375 sscanf (color + (*color=='#'), "%2x%2x%2x%2x", &fr, &fg, &fb, &fa); 376 377 if (content == CAIRO_CONTENT_ALPHA) 378 { 379 if (view_opts->annotate || 380 br != bg || bg != bb || 381 fr != fg || fg != fb) 382 content = CAIRO_CONTENT_COLOR; 383 } 384 if (ba != 255) 385 content = CAIRO_CONTENT_COLOR_ALPHA; 386 387 cairo_surface_t *surface; 388 FILE *f = out_opts->get_file_handle (); 389 if (constructor) 390 surface = constructor (stdio_write_func, f, w, h); 391 else if (constructor2) 392 surface = constructor2 (stdio_write_func, f, w, h, content); 393 else 394 fail (false, "Unknown output format `%s'; supported formats are: %s%s", 395 extension, 396 g_strjoinv ("/", const_cast<char**> (helper_cairo_supported_formats)), 397 out_opts->explicit_output_format ? "" : 398 "\nTry setting format using --output-format"); 399 400 cairo_t *cr = cairo_create (surface); 401 content = cairo_surface_get_content (surface); 402 403 switch (content) { 404 case CAIRO_CONTENT_ALPHA: 405 cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); 406 cairo_set_source_rgba (cr, 1., 1., 1., br / 255.); 407 cairo_paint (cr); 408 cairo_set_source_rgba (cr, 1., 1., 1., 409 (fr / 255.) * (fa / 255.) + (br / 255) * (1 - (fa / 255.))); 410 break; 411 default: 412 case CAIRO_CONTENT_COLOR: 413 case CAIRO_CONTENT_COLOR_ALPHA: 414 cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); 415 cairo_set_source_rgba (cr, br / 255., bg / 255., bb / 255., ba / 255.); 416 cairo_paint (cr); 417 cairo_set_operator (cr, CAIRO_OPERATOR_OVER); 418 cairo_set_source_rgba (cr, fr / 255., fg / 255., fb / 255., fa / 255.); 419 break; 420 } 421 422 cairo_surface_destroy (surface); 423 return cr; 424} 425 426void 427helper_cairo_destroy_context (cairo_t *cr) 428{ 429 finalize_closure_t *closure = (finalize_closure_t *) 430 cairo_surface_get_user_data (cairo_get_target (cr), 431 &finalize_closure_key); 432 if (closure) 433 closure->callback (closure); 434 435 cairo_status_t status = cairo_status (cr); 436 if (status != CAIRO_STATUS_SUCCESS) 437 fail (false, "Failed: %s", 438 cairo_status_to_string (status)); 439 cairo_destroy (cr); 440} 441 442 443void 444helper_cairo_line_from_buffer (helper_cairo_line_t *l, 445 hb_buffer_t *buffer, 446 const char *text, 447 unsigned int text_len, 448 int scale_bits, 449 hb_bool_t utf8_clusters) 450{ 451 memset (l, 0, sizeof (*l)); 452 453 l->num_glyphs = hb_buffer_get_length (buffer); 454 hb_glyph_info_t *hb_glyph = hb_buffer_get_glyph_infos (buffer, NULL); 455 hb_glyph_position_t *hb_position = hb_buffer_get_glyph_positions (buffer, NULL); 456 l->glyphs = cairo_glyph_allocate (l->num_glyphs + 1); 457 458 if (text) { 459 l->utf8 = g_strndup (text, text_len); 460 l->utf8_len = text_len; 461 l->num_clusters = l->num_glyphs ? 1 : 0; 462 for (unsigned int i = 1; i < l->num_glyphs; i++) 463 if (hb_glyph[i].cluster != hb_glyph[i-1].cluster) 464 l->num_clusters++; 465 l->clusters = cairo_text_cluster_allocate (l->num_clusters); 466 } 467 468 if ((l->num_glyphs && !l->glyphs) || 469 (l->utf8_len && !l->utf8) || 470 (l->num_clusters && !l->clusters)) 471 { 472 l->finish (); 473 return; 474 } 475 476 hb_position_t x = 0, y = 0; 477 int i; 478 for (i = 0; i < (int) l->num_glyphs; i++) 479 { 480 l->glyphs[i].index = hb_glyph[i].codepoint; 481 l->glyphs[i].x = scalbn ( hb_position->x_offset + x, scale_bits); 482 l->glyphs[i].y = scalbn (-hb_position->y_offset + y, scale_bits); 483 x += hb_position->x_advance; 484 y += -hb_position->y_advance; 485 486 hb_position++; 487 } 488 l->glyphs[i].index = -1; 489 l->glyphs[i].x = scalbn (x, scale_bits); 490 l->glyphs[i].y = scalbn (y, scale_bits); 491 492 if (l->num_clusters) { 493 memset ((void *) l->clusters, 0, l->num_clusters * sizeof (l->clusters[0])); 494 hb_bool_t backward = HB_DIRECTION_IS_BACKWARD (hb_buffer_get_direction (buffer)); 495 l->cluster_flags = backward ? CAIRO_TEXT_CLUSTER_FLAG_BACKWARD : (cairo_text_cluster_flags_t) 0; 496 unsigned int cluster = 0; 497 const char *start = l->utf8, *end; 498 l->clusters[cluster].num_glyphs++; 499 if (backward) { 500 for (i = l->num_glyphs - 2; i >= 0; i--) { 501 if (hb_glyph[i].cluster != hb_glyph[i+1].cluster) { 502 g_assert (hb_glyph[i].cluster > hb_glyph[i+1].cluster); 503 if (utf8_clusters) 504 end = start + hb_glyph[i].cluster - hb_glyph[i+1].cluster; 505 else 506 end = g_utf8_offset_to_pointer (start, hb_glyph[i].cluster - hb_glyph[i+1].cluster); 507 l->clusters[cluster].num_bytes = end - start; 508 start = end; 509 cluster++; 510 } 511 l->clusters[cluster].num_glyphs++; 512 } 513 l->clusters[cluster].num_bytes = l->utf8 + text_len - start; 514 } else { 515 for (i = 1; i < (int) l->num_glyphs; i++) { 516 if (hb_glyph[i].cluster != hb_glyph[i-1].cluster) { 517 g_assert (hb_glyph[i].cluster > hb_glyph[i-1].cluster); 518 if (utf8_clusters) 519 end = start + hb_glyph[i].cluster - hb_glyph[i-1].cluster; 520 else 521 end = g_utf8_offset_to_pointer (start, hb_glyph[i].cluster - hb_glyph[i-1].cluster); 522 l->clusters[cluster].num_bytes = end - start; 523 start = end; 524 cluster++; 525 } 526 l->clusters[cluster].num_glyphs++; 527 } 528 l->clusters[cluster].num_bytes = l->utf8 + text_len - start; 529 } 530 } 531} 532