Mercurial > octave
view libinterp/corefcn/ft-text-renderer.cc @ 22407:34ce5be04942
maint: Style check C++ code in libinterp/.
* build-env.h, build-env.in.cc, builtins.h, Cell.cc, Cell.h, __contourc__.cc,
__dispatch__.cc, __dsearchn__.cc, __ilu__.cc, __lin_interpn__.cc, __luinc__.cc,
__magick_read__.cc, __pchip_deriv__.cc, __qp__.cc, balance.cc,
base-text-renderer.h, besselj.cc, bitfcns.cc, bsxfun.cc, c-file-ptr-stream.cc,
c-file-ptr-stream.h, call-stack.cc, call-stack.h, cdisplay.c, cdisplay.h,
cellfun.cc, coct-hdf5-types.c, comment-list.cc, comment-list.h, conv2.cc,
daspk.cc, dasrt.cc, dassl.cc, data.cc, data.h, debug.cc, debug.h, defaults.cc,
defaults.in.h, defun-dld.h, defun-int.h, defun.h, det.cc, dirfns.cc, dirfns.h,
display.cc, display.h, dlmread.cc, dynamic-ld.cc, dynamic-ld.h, eig.cc,
error.cc, error.h, errwarn.h, event-queue.cc, event-queue.h, fft.cc, fft2.cc,
fftn.cc, file-io.cc, file-io.h, filter.cc, find.cc, ft-text-renderer.cc,
ft-text-renderer.h, gammainc.cc, gcd.cc, getgrent.cc, getpwent.cc, givens.cc,
gl-render.cc, gl-render.h, gl2ps-print.cc, gl2ps-print.h, graphics.cc,
graphics.in.h, gripes.h, gsvd.cc, hash.cc, help.cc, help.h, hess.cc,
hex2num.cc, hook-fcn.cc, hook-fcn.h, input.cc, input.h, interpreter.cc,
interpreter.h, inv.cc, jit-ir.cc, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h,
jit-util.cc, jit-util.h, kron.cc, load-path.cc, load-path.h, load-save.cc,
load-save.h, lookup.cc, ls-ascii-helper.cc, ls-ascii-helper.h, ls-hdf5.cc,
ls-hdf5.h, ls-mat-ascii.cc, ls-mat-ascii.h, ls-mat4.cc, ls-mat4.h, ls-mat5.h,
ls-oct-binary.cc, ls-oct-binary.h, ls-oct-text.cc, ls-oct-text.h, ls-utils.cc,
ls-utils.h, lsode.cc, lu.cc, matrix_type.cc, max.cc, mex.cc, mex.h, mexproto.h,
mgorth.cc, mxarray.in.h, nproc.cc, oct-errno.h, oct-errno.in.cc, oct-fstrm.cc,
oct-fstrm.h, oct-handle.h, oct-hdf5-types.cc, oct-hdf5-types.h, oct-hdf5.h,
oct-hist.cc, oct-hist.h, oct-iostrm.cc, oct-iostrm.h, oct-lvalue.cc,
oct-lvalue.h, oct-map.h, oct-obj.h, oct-opengl.h, oct-prcstrm.cc,
oct-prcstrm.h, oct-procbuf.cc, oct-procbuf.h, oct-stdstrm.h, oct-stream.cc,
oct-stream.h, oct-strstrm.cc, oct-strstrm.h, oct.h, octave-default-image.h,
octave-link.h, octave-preserve-stream-state.h, ordschur.cc, pager.cc, pager.h,
pinv.cc, pr-output.cc, pr-output.h, procstream.cc, procstream.h, profiler.h,
psi.cc, pt-jit.cc, pt-jit.h, quad.cc, quadcc.cc, qz.cc, rand.cc, rcond.cc,
regexp.cc, schur.cc, sighandlers.cc, sighandlers.h, sparse-xdiv.cc,
sparse-xdiv.h, sparse-xpow.cc, sparse-xpow.h, sparse.cc, spparms.cc, sqrtm.cc,
str2double.cc, strfind.cc, strfns.cc, sub2ind.cc, svd.cc, sylvester.cc,
symtab.cc, symtab.h, syscalls.cc, sysdep.cc, sysdep.h, text-renderer.cc,
text-renderer.h, time.cc, toplev.cc, toplev.h, tril.cc, tsearch.cc, txt-eng.cc,
txt-eng.h, typecast.cc, urlwrite.cc, utils.cc, utils.h, variables.cc,
variables.h, workspace-element.h, xdiv.cc, xdiv.h, xnorm.cc, xnorm.h, xpow.cc,
xpow.h, zfstream.cc, zfstream.h, deprecated-config.h, __delaunayn__.cc,
__eigs__.cc, __fltk_uigetfile__.cc, __glpk__.cc, __init_fltk__.cc,
__init_gnuplot__.cc, __osmesa_print__.cc, __voronoi__.cc, amd.cc,
audiodevinfo.cc, audioread.cc, ccolamd.cc, chol.cc, colamd.cc, convhulln.cc,
dmperm.cc, fftw.cc, gzip.cc, oct-qhull.h, qr.cc, symbfact.cc, symrcm.cc,
liboctinterp-build-info.h, liboctinterp-build-info.in.cc, ov-base-diag.h,
ov-base-int.cc, ov-base-int.h, ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.h,
ov-base-sparse.cc, ov-base-sparse.h, ov-base.cc, ov-base.h, ov-bool-mat.cc,
ov-bool-mat.h, ov-bool-sparse.cc, ov-bool-sparse.h, ov-bool.cc, ov-bool.h,
ov-builtin.cc, ov-builtin.h, ov-cell.cc, ov-cell.h, ov-ch-mat.cc, ov-ch-mat.h,
ov-class.cc, ov-class.h, ov-classdef.cc, ov-classdef.h, ov-colon.cc,
ov-colon.h, ov-complex.cc, ov-complex.h, ov-cs-list.h, ov-cx-diag.cc,
ov-cx-diag.h, ov-cx-mat.cc, ov-cx-mat.h, ov-cx-sparse.cc, ov-cx-sparse.h,
ov-dld-fcn.cc, ov-dld-fcn.h, ov-fcn-handle.cc, ov-fcn-handle.h,
ov-fcn-inline.cc, ov-fcn-inline.h, ov-fcn.cc, ov-fcn.h, ov-float.cc,
ov-float.h, ov-flt-complex.cc, ov-flt-complex.h, ov-flt-cx-diag.cc,
ov-flt-cx-diag.h, ov-flt-cx-mat.cc, ov-flt-cx-mat.h, ov-flt-re-diag.cc,
ov-flt-re-diag.h, ov-flt-re-mat.cc, ov-flt-re-mat.h, ov-int-traits.h,
ov-int16.cc, ov-int16.h, ov-int32.cc, ov-int32.h, ov-int64.cc, ov-int64.h,
ov-int8.cc, ov-int8.h, ov-intx.h, ov-java.cc, ov-java.h, ov-lazy-idx.cc,
ov-lazy-idx.h, ov-mex-fcn.cc, ov-mex-fcn.h, ov-null-mat.cc, ov-null-mat.h,
ov-oncleanup.cc, ov-oncleanup.h, ov-perm.cc, ov-perm.h, ov-range.cc,
ov-range.h, ov-re-diag.cc, ov-re-diag.h, ov-re-mat.cc, ov-re-mat.h,
ov-re-sparse.cc, ov-re-sparse.h, ov-scalar.cc, ov-scalar.h, ov-str-mat.cc,
ov-str-mat.h, ov-struct.cc, ov-struct.h, ov-typeinfo.cc, ov-typeinfo.h,
ov-uint16.cc, ov-uint16.h, ov-uint32.cc, ov-uint32.h, ov-uint64.cc,
ov-uint64.h, ov-uint8.cc, ov-uint8.h, ov-usr-fcn.cc, ov-usr-fcn.h, ov.h,
ovl.cc, ovl.h, octave.cc, octave.h, op-b-b.cc, op-b-bm.cc, op-b-sbm.cc,
op-bm-b.cc, op-bm-bm.cc, op-bm-sbm.cc, op-cdm-cdm.cc, op-cell.cc, op-chm.cc,
op-class.cc, op-cm-cm.cc, op-cm-cs.cc, op-cm-m.cc, op-cm-pm.cc, op-cm-s.cc,
op-cm-scm.cc, op-cm-sm.cc, op-cs-cm.cc, op-cs-cs.cc, op-cs-m.cc, op-cs-s.cc,
op-cs-scm.cc, op-cs-sm.cc, op-dm-dm.cc, op-dm-scm.cc, op-dm-sm.cc,
op-dm-template.cc, op-dms-template.cc, op-fcdm-fcdm.cc, op-fcm-fcm.cc,
op-fcm-fcs.cc, op-fcm-fm.cc, op-fcm-fs.cc, op-fcm-pm.cc, op-fcn.cc,
op-fcs-fcm.cc, op-fcs-fcs.cc, op-fcs-fm.cc, op-fcs-fs.cc, op-fdm-fdm.cc,
op-fm-fcm.cc, op-fm-fcs.cc, op-fm-fm.cc, op-fm-fs.cc, op-fm-pm.cc,
op-fs-fcm.cc, op-fs-fcs.cc, op-fs-fm.cc, op-fs-fs.cc, op-i16-i16.cc,
op-i32-i32.cc, op-i64-i64.cc, op-i8-i8.cc, op-int-concat.cc, op-int.h,
op-m-cm.cc, op-m-cs.cc, op-m-m.cc, op-m-pm.cc, op-m-s.cc, op-m-scm.cc,
op-m-sm.cc, op-pm-cm.cc, op-pm-fcm.cc, op-pm-fm.cc, op-pm-m.cc, op-pm-pm.cc,
op-pm-scm.cc, op-pm-sm.cc, op-pm-template.cc, op-range.cc, op-s-cm.cc,
op-s-cs.cc, op-s-m.cc, op-s-s.cc, op-s-scm.cc, op-s-sm.cc, op-sbm-b.cc,
op-sbm-bm.cc, op-sbm-sbm.cc, op-scm-cm.cc, op-scm-cs.cc, op-scm-m.cc,
op-scm-s.cc, op-scm-scm.cc, op-scm-sm.cc, op-sm-cm.cc, op-sm-cs.cc, op-sm-m.cc,
op-sm-s.cc, op-sm-scm.cc, op-sm-sm.cc, op-str-m.cc, op-str-s.cc, op-str-str.cc,
op-struct.cc, op-ui16-ui16.cc, op-ui32-ui32.cc, op-ui64-ui64.cc, op-ui8-ui8.cc,
ops.h, options-usage.h, lex.h, parse.h, pt-all.h, pt-arg-list.cc,
pt-arg-list.h, pt-array-list.h, pt-assign.cc, pt-assign.h, pt-binop.cc,
pt-binop.h, pt-bp.cc, pt-bp.h, pt-cbinop.cc, pt-cbinop.h, pt-cell.cc,
pt-cell.h, pt-check.cc, pt-check.h, pt-classdef.cc, pt-classdef.h, pt-cmd.cc,
pt-cmd.h, pt-colon.cc, pt-colon.h, pt-const.cc, pt-const.h, pt-decl.cc,
pt-decl.h, pt-eval.cc, pt-eval.h, pt-except.cc, pt-except.h, pt-exp.cc,
pt-exp.h, pt-fcn-handle.cc, pt-fcn-handle.h, pt-funcall.cc, pt-funcall.h,
pt-id.cc, pt-id.h, pt-idx.cc, pt-idx.h, pt-jump.cc, pt-jump.h, pt-loop.cc,
pt-loop.h, pt-mat.cc, pt-mat.h, pt-misc.cc, pt-misc.h, pt-pr-code.cc,
pt-pr-code.h, pt-select.cc, pt-select.h, pt-stmt.cc, pt-stmt.h, pt-unop.cc,
pt-unop.h, pt-walk.h, pt.cc, pt.h, token.cc, token.h, Array-jit.cc,
Array-tc.cc, version.cc, version.in.h:
Style check C++ code in libinterp/
author | Rik <rik@octave.org> |
---|---|
date | Tue, 30 Aug 2016 21:46:47 -0700 |
parents | b81b08cc4c83 |
children | 77b50a83ec11 |
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/* Copyright (C) 2016 John W. Eaton Copyright (C) 2009-2016 Michael Goffioul This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include "base-text-renderer.h" #if defined (HAVE_FREETYPE) #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC) #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wold-style-cast" #endif #include <ft2build.h> #include FT_FREETYPE_H #if defined (HAVE_FONTCONFIG) # include <fontconfig/fontconfig.h> #endif #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC) #pragma GCC diagnostic pop #endif #include <clocale> #include <cwchar> #include <iostream> #include <map> #include <utility> #include "singleton-cleanup.h" #include "error.h" #include "pr-output.h" #include "text-renderer.h" // FIXME: maybe issue at most one warning per glyph/font/size/weight // combination. static void warn_missing_glyph (FT_ULong c) { warning_with_id ("Octave:missing-glyph", "text_renderer: skipping missing glyph for character '%x'", c); } static void warn_glyph_render (FT_ULong c) { warning_with_id ("Octave:glyph-render", "text_renderer: unable to render glyph for character '%x'", c); } #if defined (_MSC_VER) // FIXME: is this really needed? // // This is just a trick to avoid multiple symbol definitions. // PermMatrix.h contains a dllexport'ed Array<octave_idx_type> // that will cause MSVC not to generate a new instantiation and // use the imported one instead. # include "PermMatrix.h" #endif // Forward declaration static void ft_face_destroyed (void *object); namespace octave { class ft_manager { public: static bool instance_ok (void) { bool retval = true; if (! instance) { instance = new ft_manager (); if (instance) singleton_cleanup_list::add (cleanup_instance); } if (! instance) error ("unable to create ft_manager!"); return retval; } static void cleanup_instance (void) { delete instance; instance = 0; } static FT_Face get_font (const std::string& name, const std::string& weight, const std::string& angle, double size) { return (instance_ok () ? instance->do_get_font (name, weight, angle, size) : 0); } static void font_destroyed (FT_Face face) { if (instance_ok ()) instance->do_font_destroyed (face); } private: static ft_manager *instance; typedef std::pair<std::string, double> ft_key; typedef std::map<ft_key, FT_Face> ft_cache; // Cache the fonts loaded by FreeType. This cache only contains // weak references to the fonts, strong references are only present // in class text_renderer. ft_cache cache; private: // No copying! ft_manager (const ft_manager&); ft_manager& operator = (const ft_manager&); ft_manager (void) : library (), freetype_initialized (false), fontconfig_initialized (false) { if (FT_Init_FreeType (&library)) error ("unable to initialize FreeType library"); else freetype_initialized = true; #if defined (HAVE_FONTCONFIG) if (! FcInit ()) error ("unable to initialize fontconfig library"); else fontconfig_initialized = true; #endif } ~ft_manager (void) { if (freetype_initialized) FT_Done_FreeType (library); #if defined (HAVE_FONTCONFIG) // FIXME: Skip the call to FcFini because it can trigger the assertion // // octave: fccache.c:507: FcCacheFini: Assertion 'fcCacheChains[i] == ((void *)0)' failed. // // if (fontconfig_initialized) // FcFini (); #endif } FT_Face do_get_font (const std::string& name, const std::string& weight, const std::string& angle, double size) { FT_Face retval = 0; #if defined (HAVE_FT_REFERENCE_FACE) // Look first into the font cache, then use fontconfig. If the font // is present in the cache, simply add a reference and return it. ft_key key (name + ":" + weight + ":" + angle, size); ft_cache::const_iterator it = cache.find (key); if (it != cache.end ()) { FT_Reference_Face (it->second); return it->second; } #endif std::string file; #if defined (HAVE_FONTCONFIG) if (fontconfig_initialized) { int fc_weight, fc_angle; if (weight == "bold") fc_weight = FC_WEIGHT_BOLD; else if (weight == "light") fc_weight = FC_WEIGHT_LIGHT; else if (weight == "demi") fc_weight = FC_WEIGHT_DEMIBOLD; else fc_weight = FC_WEIGHT_NORMAL; if (angle == "italic") fc_angle = FC_SLANT_ITALIC; else if (angle == "oblique") fc_angle = FC_SLANT_OBLIQUE; else fc_angle = FC_SLANT_ROMAN; FcPattern *pat = FcPatternCreate (); FcPatternAddString (pat, FC_FAMILY, (reinterpret_cast<const FcChar8*> (name == "*" ? "sans" : name.c_str ()))); FcPatternAddInteger (pat, FC_WEIGHT, fc_weight); FcPatternAddInteger (pat, FC_SLANT, fc_angle); FcPatternAddDouble (pat, FC_PIXEL_SIZE, size); if (FcConfigSubstitute (0, pat, FcMatchPattern)) { FcResult res; FcPattern *match; FcDefaultSubstitute (pat); match = FcFontMatch (0, pat, &res); // FIXME: originally, this test also required that // res != FcResultNoMatch. Is that really needed? if (match) { unsigned char *tmp; FcPatternGetString (match, FC_FILE, 0, &tmp); file = reinterpret_cast<char*> (tmp); } else ::warning ("could not match any font: %s-%s-%s-%g", name.c_str (), weight.c_str (), angle.c_str (), size); if (match) FcPatternDestroy (match); } FcPatternDestroy (pat); } #endif if (file.empty ()) { #if defined (OCTAVE_USE_WINDOWS_API) file = "C:/WINDOWS/Fonts/verdana.ttf"; #else // FIXME: find a "standard" font for UNIX platforms #endif } if (! file.empty ()) { if (FT_New_Face (library, file.c_str (), 0, &retval)) ::warning ("ft_manager: unable to load font: %s", file.c_str ()); #if defined (HAVE_FT_REFERENCE_FACE) else { // Install a finalizer to notify ft_manager that the font is // being destroyed. The class ft_manager only keeps weak // references to font objects. retval->generic.data = new ft_key (key); retval->generic.finalizer = ft_face_destroyed; // Insert loaded font into the cache. cache[key] = retval; } #endif } return retval; } void do_font_destroyed (FT_Face face) { if (face->generic.data) { ft_key *pkey = reinterpret_cast<ft_key*> (face->generic.data); cache.erase (*pkey); delete pkey; face->generic.data = 0; } } private: FT_Library library; bool freetype_initialized; bool fontconfig_initialized; }; ft_manager *ft_manager::instance = 0; } static void ft_face_destroyed (void *object) { octave::ft_manager::font_destroyed (reinterpret_cast<FT_Face> (object)); } namespace octave { class OCTINTERP_API ft_text_renderer : public base_text_renderer { public: enum { MODE_BBOX = 0, MODE_RENDER = 1 }; enum { ROTATION_0 = 0, ROTATION_90 = 1, ROTATION_180 = 2, ROTATION_270 = 3 }; public: ft_text_renderer (void) : base_text_renderer (), font (), bbox (1, 4, 0.0), halign (0), xoffset (0), line_yoffset (0), yoffset (0), mode (MODE_BBOX), color (dim_vector (1, 3), 0) { } ~ft_text_renderer (void) { } void visit (text_element_string& e); void visit (text_element_list& e); void visit (text_element_subscript& e); void visit (text_element_superscript& e); void visit (text_element_color& e); void visit (text_element_fontsize& e); void visit (text_element_fontname& e); void visit (text_element_fontstyle& e); void visit (text_element_symbol& e); void visit (text_element_combined& e); void reset (void); uint8NDArray get_pixels (void) const { return pixels; } Matrix get_boundingbox (void) const { return bbox; } uint8NDArray render (text_element *elt, Matrix& box, int rotation = ROTATION_0); Matrix get_extent (text_element *elt, double rotation = 0.0); Matrix get_extent (const std::string& txt, double rotation, const caseless_str& interpreter); void set_font (const std::string& name, const std::string& weight, const std::string& angle, double size); void set_color (const Matrix& c); void set_mode (int m); void text_to_pixels (const std::string& txt, uint8NDArray& pxls, Matrix& bbox, int halign, int valign, double rotation, const caseless_str& interpreter, bool handle_rotation); private: int rotation_to_mode (double rotation) const; // No copying! ft_text_renderer (const ft_text_renderer&); ft_text_renderer& operator = (const ft_text_renderer&); // Class to hold information about fonts and a strong // reference to the font objects loaded by FreeType. class ft_font : public text_renderer::font { public: ft_font (void) : text_renderer::font (), face (0) { } ft_font (const std::string& nm, const std::string& wt, const std::string& ang, double sz, FT_Face f = 0) : text_renderer::font (nm, wt, ang, sz), face (f) { } ft_font (const ft_font& ft); ~ft_font (void) { if (face) FT_Done_Face (face); } ft_font& operator = (const ft_font& ft); bool is_valid (void) const { return get_face (); } FT_Face get_face (void) const; private: mutable FT_Face face; }; void push_new_line (void); void update_line_bbox (void); void compute_bbox (void); int compute_line_xoffset (const Matrix& lb) const; FT_UInt process_character (FT_ULong code, FT_UInt previous = 0); public: void text_to_strlist (const std::string& txt, std::list<text_renderer::string>& lst, Matrix& bbox, int halign, int valign, double rotation, const caseless_str& interp); private: // The current font used by the renderer. ft_font font; // Used to stored the bounding box corresponding to the rendered text. // The bounding box has the form [x, y, w, h] where x and y represent the // coordinates of the bottom left corner relative to the anchor point of // the text (== start of text on the baseline). Due to font descent or // multiple lines, the value y is usually negative. Matrix bbox; // Used to stored the rendered text. It's a 3D matrix with size MxNx4 // where M and N are the width and height of the bounding box. uint8NDArray pixels; // Used to store the bounding box of each line. This is used to layout // multiline text properly. std::list<Matrix> line_bbox; // The current horizontal alignment. This is used to align multi-line text. int halign; // The X offset for the next glyph. int xoffset; // The Y offset of the baseline for the current line. int line_yoffset; // The Y offset of the baseline for the next glyph. The offset is relative // to line_yoffset. The total Y offset is computed with: // line_yoffset + yoffset. int yoffset; // The current mode of the rendering process (box computing or rendering). int mode; // The base color of the rendered text. uint8NDArray color; // A list of parsed strings to be used for printing. std::list<text_renderer::string> strlist; // The X offset of the baseline for the current line. int line_xoffset; }; void ft_text_renderer::set_font (const std::string& name, const std::string& weight, const std::string& angle, double size) { // FIXME: take "fontunits" into account font = ft_font (name, weight, angle, size, 0); } void ft_text_renderer::push_new_line (void) { switch (mode) { case MODE_BBOX: { // Create a new bbox entry based on the current font. FT_Face face = font.get_face (); if (face) { int asc = face->size->metrics.ascender >> 6; int desc = face->size->metrics.descender >> 6; int h = face->size->metrics.height >> 6; Matrix bb (1, 5, 0.0); bb(1) = desc; bb(3) = asc - desc; bb(4) = h; line_bbox.push_back (bb); xoffset = yoffset = 0; } } break; case MODE_RENDER: { // Move to the next line bbox, adjust xoffset based on alignment // and yoffset based on the old and new line bbox. Matrix old_bbox = line_bbox.front (); line_bbox.pop_front (); Matrix new_bbox = line_bbox.front (); xoffset = line_xoffset = compute_line_xoffset (new_bbox); line_yoffset += (old_bbox(1) - (new_bbox(1) + new_bbox(3))); yoffset = 0; } break; } } int ft_text_renderer::compute_line_xoffset (const Matrix& lb) const { if (! bbox.is_empty ()) { switch (halign) { case 0: return 0; case 1: return (bbox(2) - lb(2)) / 2; case 2: return (bbox(2) - lb(2)); } } return 0; } void ft_text_renderer::compute_bbox (void) { // Stack the various line bbox together and compute the final // bounding box for the entire text string. bbox = Matrix (); switch (line_bbox.size ()) { case 0: break; case 1: bbox = line_bbox.front ().extract (0, 0, 0, 3); break; default: for (std::list<Matrix>::const_iterator it = line_bbox.begin (); it != line_bbox.end (); ++it) { if (bbox.is_empty ()) bbox = it->extract (0, 0, 0, 3); else { bbox(1) -= (*it)(3); bbox(3) += (*it)(3); bbox(2) = octave::math::max (bbox(2), (*it)(2)); } } break; } } void ft_text_renderer::update_line_bbox (void) { // Called after a font change, when in MODE_BBOX mode, to update the // current line bbox with the new font metrics. This also includes the // current yoffset, that is the offset of the current glyph's baseline // the line's baseline. if (mode == MODE_BBOX) { int asc = font.get_face ()->size->metrics.ascender >> 6; int desc = font.get_face ()->size->metrics.descender >> 6; Matrix& bb = line_bbox.back (); if ((yoffset + desc) < bb(1)) { // The new font goes below the bottom of the current bbox. int delta = bb(1) - (yoffset + desc); bb(1) -= delta; bb(3) += delta; } if ((yoffset + asc) > (bb(1) + bb(3))) { // The new font goes above the top of the current bbox. int delta = (yoffset + asc) - (bb(1) + bb(3)); bb(3) += delta; } } } void ft_text_renderer::set_mode (int m) { mode = m; switch (mode) { case MODE_BBOX: xoffset = line_yoffset = yoffset = 0; bbox = Matrix (1, 4, 0.0); line_bbox.clear (); push_new_line (); break; case MODE_RENDER: if (bbox.numel () != 4) { ::warning ("ft_text_renderer: invalid bounding box, cannot render"); xoffset = line_yoffset = yoffset = 0; pixels = uint8NDArray (); } else { dim_vector d (4, octave_idx_type (bbox(2)), octave_idx_type (bbox(3))); pixels = uint8NDArray (d, static_cast<uint8_t> (0)); xoffset = compute_line_xoffset (line_bbox.front ()); line_yoffset = -bbox(1)-1; yoffset = 0; } break; default: error ("ft_text_renderer: invalid mode '%d'", mode); break; } } FT_UInt ft_text_renderer::process_character (FT_ULong code, FT_UInt previous) { FT_Face face = font.get_face (); FT_UInt glyph_index = 0; if (face) { glyph_index = FT_Get_Char_Index (face, code); if (code != '\n' && (! glyph_index || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT))) { glyph_index = 0; warn_missing_glyph (code); } else { switch (mode) { case MODE_RENDER: if (code == '\n') { glyph_index = FT_Get_Char_Index (face, ' '); if (! glyph_index || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT)) { glyph_index = 0; warn_missing_glyph (' '); } else push_new_line (); } else if (FT_Render_Glyph (face->glyph, FT_RENDER_MODE_NORMAL)) { glyph_index = 0; warn_glyph_render (code); } else { FT_Bitmap& bitmap = face->glyph->bitmap; int x0, y0; if (previous) { FT_Vector delta; FT_Get_Kerning (face, previous, glyph_index, FT_KERNING_DEFAULT, &delta); xoffset += (delta.x >> 6); } x0 = xoffset + face->glyph->bitmap_left; y0 = line_yoffset + yoffset + face->glyph->bitmap_top; // 'w' seems to have a negative -1 // face->glyph->bitmap_left, this is so we don't // index out of bound, and assumes we've allocated // the right amount of horizontal space in the bbox. if (x0 < 0) x0 = 0; for (int r = 0; static_cast<unsigned int> (r) < bitmap.rows; r++) for (int c = 0; static_cast<unsigned int> (c) < bitmap.width; c++) { unsigned char pix = bitmap.buffer[r*bitmap.width+c]; if (x0+c < 0 || x0+c >= pixels.dim2 () || y0-r < 0 || y0-r >= pixels.dim3 ()) { //::warning ("ft_text_renderer: pixel out of bound (char=%d, (x,y)=(%d,%d), (w,h)=(%d,%d)", // str[i], x0+c, y0-r, pixels.dim2 (), pixels.dim3 ()); } else if (pixels(3, x0+c, y0-r).value () == 0) { pixels(0, x0+c, y0-r) = color(0); pixels(1, x0+c, y0-r) = color(1); pixels(2, x0+c, y0-r) = color(2); pixels(3, x0+c, y0-r) = pix; } } xoffset += (face->glyph->advance.x >> 6); } break; case MODE_BBOX: if (code == '\n') { glyph_index = FT_Get_Char_Index (face, ' '); if (! glyph_index || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT)) { glyph_index = 0; warn_missing_glyph (' '); } else push_new_line (); } else { Matrix& bb = line_bbox.back (); // If we have a previous glyph, use kerning information. // This usually means moving a bit backward before adding // the next glyph. That is, "delta.x" is usually < 0. if (previous) { FT_Vector delta; FT_Get_Kerning (face, previous, glyph_index, FT_KERNING_DEFAULT, &delta); xoffset += (delta.x >> 6); } // Extend current X offset box by the width of the current // glyph. Then extend the line bounding box if necessary. xoffset += (face->glyph->advance.x >> 6); bb(2) = octave::math::max (bb(2), xoffset); } break; } } } return glyph_index; } void ft_text_renderer::text_to_strlist (const std::string& txt, std::list<text_renderer::string>& lst, Matrix& box, int ha, int va, double rot, const caseless_str& interp) { uint8NDArray pxls; // First run text_to_pixels which will also build the string list text_to_pixels (txt, pxls, box, ha, va, rot, interp, false); lst = strlist; } void ft_text_renderer::visit (text_element_string& e) { if (font.is_valid ()) { FT_UInt glyph_index, previous = 0; std::string str = e.string_value (); size_t n = str.length (); size_t curr = 0; size_t idx = 0; mbstate_t ps; memset (&ps, 0, sizeof (ps)); // Initialize state to 0. wchar_t wc; text_renderer::string fs (str, font, xoffset, yoffset); while (n > 0) { size_t r = std::mbrtowc (&wc, str.data () + curr, n, &ps); if (r > 0 && r != static_cast<size_t> (-1) && r != static_cast<size_t> (-2)) { n -= r; curr += r; if (wc == L'\n') { // Finish previous string in srtlist before processing // the newline character fs.set_y (line_yoffset + yoffset); fs.set_color (color); std::string s = str.substr (idx, curr - idx - 1); if (! s.empty ()) { fs.set_string (s); strlist.push_back (fs); } } glyph_index = process_character (wc, previous); if (wc == L'\n') { previous = 0; // Start a new string in strlist idx = curr; fs = text_renderer::string (str.substr (idx), font, line_xoffset, yoffset); } else previous = glyph_index; } else { if (r != 0) ::warning ("ft_text_renderer: failed to decode string `%s' with " "locale `%s'", str.c_str (), std::setlocale (LC_CTYPE, 0)); break; } } if (! fs.get_string ().empty ()) { fs.set_y (line_yoffset + yoffset); fs.set_color (color); strlist.push_back (fs); } } } void ft_text_renderer::visit (text_element_list& e) { // Save and restore (after processing the list) the current font and color. ft_font saved_font (font); uint8NDArray saved_color (color); text_processor::visit (e); font = saved_font; color = saved_color; } void ft_text_renderer::visit (text_element_subscript& e) { ft_font saved_font (font); int saved_line_yoffset = line_yoffset; int saved_yoffset = yoffset; set_font (font.get_name (), font.get_weight (), font.get_angle (), font.get_size () - 2); if (font.is_valid ()) { int h = font.get_face ()->size->metrics.height >> 6; // Shifting the baseline by 2/3 the font height seems to produce // decent result. yoffset -= (h * 2) / 3; if (mode == MODE_BBOX) update_line_bbox (); } text_processor::visit (e); font = saved_font; // If line_yoffset changed, this means we moved to a new line; hence yoffset // cannot be restored, because the saved value is not relevant anymore. if (line_yoffset == saved_line_yoffset) yoffset = saved_yoffset; } void ft_text_renderer::visit (text_element_superscript& e) { ft_font saved_font (font); int saved_line_yoffset = line_yoffset; int saved_yoffset = yoffset; set_font (font.get_name (), font.get_weight (), font.get_angle (), font.get_size () - 2); if (saved_font.is_valid ()) { int s_asc = saved_font.get_face ()->size->metrics.ascender >> 6; // Shifting the baseline by 2/3 base font ascender seems to produce // decent result. yoffset += (s_asc * 2) / 3; if (mode == MODE_BBOX) update_line_bbox (); } text_processor::visit (e); font = saved_font; // If line_yoffset changed, this means we moved to a new line; hence yoffset // cannot be restored, because the saved value is not relevant anymore. if (line_yoffset == saved_line_yoffset) yoffset = saved_yoffset; } void ft_text_renderer::visit (text_element_color& e) { if (mode == MODE_RENDER) set_color (e.get_color ()); } void ft_text_renderer::visit (text_element_fontsize& e) { double sz = e.get_fontsize (); // FIXME: Matlab documentation says that the font size is expressed // in the text object FontUnit. set_font (font.get_name (), font.get_weight (), font.get_angle (), sz); if (mode == MODE_BBOX) update_line_bbox (); } void ft_text_renderer::visit (text_element_fontname& e) { set_font (e.get_fontname (), font.get_weight (), font.get_angle (), font.get_size ()); if (mode == MODE_BBOX) update_line_bbox (); } void ft_text_renderer::visit (text_element_fontstyle& e) { switch (e.get_fontstyle ()) { case text_element_fontstyle::normal: set_font (font.get_name (), "normal", "normal", font.get_size ()); break; case text_element_fontstyle::bold: set_font (font.get_name (), "bold", "normal", font.get_size ()); break; case text_element_fontstyle::italic: set_font (font.get_name (), "normal", "italic", font.get_size ()); break; case text_element_fontstyle::oblique: set_font (font.get_name (), "normal", "oblique", font.get_size ()); break; } if (mode == MODE_BBOX) update_line_bbox (); } void ft_text_renderer::visit (text_element_symbol& e) { uint32_t code = e.get_symbol_code (); text_renderer::string fs (std::string ("-"), font, xoffset, yoffset); if (code != text_element_symbol::invalid_code && font.is_valid ()) { process_character (code); fs.set_code (code); } else if (font.is_valid ()) ::warning ("ignoring unknown symbol: %d", e.get_symbol ()); if (fs.get_code ()) { fs.set_y (line_yoffset + yoffset); fs.set_color (color); strlist.push_back (fs); } } void ft_text_renderer::visit (text_element_combined& e) { int saved_xoffset = xoffset; int max_xoffset = xoffset; for (text_element_combined::iterator it = e.begin (); it != e.end (); ++it) { xoffset = saved_xoffset; (*it)->accept (*this); max_xoffset = octave::math::max (xoffset, max_xoffset); } xoffset = max_xoffset; } void ft_text_renderer::reset (void) { set_mode (MODE_BBOX); set_color (Matrix (1, 3, 0.0)); } void ft_text_renderer::set_color (const Matrix& c) { if (c.numel () == 3) { color(0) = static_cast<uint8_t> (c(0)*255); color(1) = static_cast<uint8_t> (c(1)*255); color(2) = static_cast<uint8_t> (c(2)*255); } else ::warning ("ft_text_renderer::set_color: invalid color"); } uint8NDArray ft_text_renderer::render (text_element *elt, Matrix& box, int rotation) { set_mode (MODE_BBOX); elt->accept (*this); compute_bbox (); box = bbox; set_mode (MODE_RENDER); // Clear the list of parsed strings strlist.clear (); if (pixels.numel () > 0) { elt->accept (*this); switch (rotation) { case ROTATION_0: break; case ROTATION_90: { Array<octave_idx_type> perm (dim_vector (3, 1)); perm(0) = 0; perm(1) = 2; perm(2) = 1; pixels = pixels.permute (perm); Array<idx_vector> idx (dim_vector (3, 1)); idx(0) = idx_vector (':'); idx(1) = idx_vector (pixels.dim2 ()-1, -1, -1); idx(2) = idx_vector (':'); pixels = uint8NDArray (pixels.index (idx)); } break; case ROTATION_180: { Array<idx_vector> idx (dim_vector (3, 1)); idx(0) = idx_vector (':'); idx(1) = idx_vector (pixels.dim2 ()-1, -1, -1); idx(2) = idx_vector (pixels.dim3 ()-1, -1, -1); pixels = uint8NDArray (pixels.index (idx)); } break; case ROTATION_270: { Array<octave_idx_type> perm (dim_vector (3, 1)); perm(0) = 0; perm(1) = 2; perm(2) = 1; pixels = pixels.permute (perm); Array<idx_vector> idx (dim_vector (3, 1)); idx(0) = idx_vector (':'); idx(1) = idx_vector (':'); idx(2) = idx_vector (pixels.dim3 ()-1, -1, -1); pixels = uint8NDArray (pixels.index (idx)); } break; } } return pixels; } // Note: // x-extent accurately measures width of glyphs. // y-extent is overly large because it is measured from baseline-to-baseline. // Calling routines, such as ylabel, may need to account for this mismatch. Matrix ft_text_renderer::get_extent (text_element *elt, double rotation) { set_mode (MODE_BBOX); elt->accept (*this); compute_bbox (); Matrix extent (1, 2, 0.0); switch (rotation_to_mode (rotation)) { case ROTATION_0: case ROTATION_180: extent(0) = bbox(2); extent(1) = bbox(3); break; case ROTATION_90: case ROTATION_270: extent(0) = bbox(3); extent(1) = bbox(2); } return extent; } Matrix ft_text_renderer::get_extent (const std::string& txt, double rotation, const caseless_str& interpreter) { text_element *elt = text_parser::parse (txt, interpreter); Matrix extent = get_extent (elt, rotation); delete elt; return extent; } int ft_text_renderer::rotation_to_mode (double rotation) const { // Clip rotation to range [0, 360] while (rotation < 0) rotation += 360.0; while (rotation > 360.0) rotation -= 360.0; if (rotation == 0.0) return ROTATION_0; else if (rotation == 90.0) return ROTATION_90; else if (rotation == 180.0) return ROTATION_180; else if (rotation == 270.0) return ROTATION_270; else return ROTATION_0; } void ft_text_renderer::text_to_pixels (const std::string& txt, uint8NDArray& pxls, Matrix& box, int _halign, int valign, double rotation, const caseless_str& interpreter, bool handle_rotation) { int rot_mode = rotation_to_mode (rotation); halign = _halign; text_element *elt = text_parser::parse (txt, interpreter); pxls = render (elt, box, rot_mode); delete elt; if (pxls.is_empty ()) return; // nothing to render switch (halign) { case 1: box(0) = -box(2)/2; break; case 2: box(0) = -box(2); break; default: box(0) = 0; break; } switch (valign) { case 1: box(1) = -box(3)/2; break; case 2: box(1) = -box(3); break; case 3: break; case 4: box(1) = -box(3)-box(1); break; default: box(1) = 0; break; } if (handle_rotation) { switch (rot_mode) { case ROTATION_90: std::swap (box(0), box(1)); std::swap (box(2), box(3)); box(0) = -box(0)-box(2); break; case ROTATION_180: box(0) = -box(0)-box(2); box(1) = -box(1)-box(3); break; case ROTATION_270: std::swap (box(0), box(1)); std::swap (box(2), box(3)); box(1) = -box(1)-box(3); break; } } } ft_text_renderer::ft_font::ft_font (const ft_font& ft) : text_renderer::font (ft), face (0) { #if defined (HAVE_FT_REFERENCE_FACE) FT_Face ft_face = ft.get_face (); if (ft_face && FT_Reference_Face (ft_face) == 0) face = ft_face; #endif } ft_text_renderer::ft_font& ft_text_renderer::ft_font::operator = (const ft_font& ft) { if (&ft != this) { text_renderer::font::operator = (ft); if (face) { FT_Done_Face (face); face = 0; } #if defined (HAVE_FT_REFERENCE_FACE) FT_Face ft_face = ft.get_face (); if (ft_face && FT_Reference_Face (ft_face) == 0) face = ft_face; #endif } return *this; } FT_Face ft_text_renderer::ft_font::get_face (void) const { if (! face && ! name.empty ()) { face = ft_manager::get_font (name, weight, angle, size); if (face) { if (FT_Set_Char_Size (face, 0, size*64, 0, 0)) ::warning ("ft_text_renderer: unable to set font size to %g", size); } else ::warning ("ft_text_renderer: unable to load appropriate font"); } return face; } } #endif namespace octave { base_text_renderer * make_ft_text_renderer (void) { #if defined (HAVE_FREETYPE) return new ft_text_renderer (); #else return 0; #endif } }