Mercurial > octave
view libinterp/corefcn/txt-eng-ft.cc @ 19593:446c46af4b42 stable
strip trailing whitespace from most source files
* Makefile.am, NEWS, build-aux/common.mk, configure.ac,
doc/Makefile.am, doc/doxyhtml/Makefile.am,
doc/interpreter/Makefile.am, doc/interpreter/arith.txi,
doc/interpreter/audio.txi, doc/interpreter/basics.txi,
doc/interpreter/bugs.txi, doc/interpreter/container.txi,
doc/interpreter/cp-idx.txi, doc/interpreter/data.txi,
doc/interpreter/debug.txi, doc/interpreter/diagperm.txi,
doc/interpreter/diffeq.txi, doc/interpreter/doccheck/README,
doc/interpreter/doccheck/spellcheck, doc/interpreter/emacs.txi,
doc/interpreter/errors.txi, doc/interpreter/eval.txi,
doc/interpreter/expr.txi, doc/interpreter/external.txi,
doc/interpreter/fn-idx.txi, doc/interpreter/func.txi,
doc/interpreter/geometry.txi, doc/interpreter/geometryimages.m,
doc/interpreter/gpl.txi, doc/interpreter/grammar.txi,
doc/interpreter/gui.txi, doc/interpreter/image.txi,
doc/interpreter/install.txi, doc/interpreter/interp.txi,
doc/interpreter/interpimages.m, doc/interpreter/intro.txi,
doc/interpreter/io.txi, doc/interpreter/java.txi,
doc/interpreter/linalg.txi, doc/interpreter/macros.texi,
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doc/interpreter/op-idx.txi, doc/interpreter/optim.txi,
doc/interpreter/package.txi, doc/interpreter/plot.txi,
doc/interpreter/poly.txi, doc/interpreter/preface.txi,
doc/interpreter/quad.txi, doc/interpreter/set.txi,
doc/interpreter/signal.txi, doc/interpreter/sparse.txi,
doc/interpreter/sparseimages.m, doc/interpreter/splineimages.m,
doc/interpreter/stats.txi, doc/interpreter/stmt.txi,
doc/interpreter/strings.txi, doc/interpreter/system.txi,
doc/interpreter/testfun.txi, doc/interpreter/tips.txi,
doc/interpreter/var.txi, doc/interpreter/vectorize.txi,
doc/liboctave/Makefile.am, doc/liboctave/array.texi,
doc/liboctave/bugs.texi, doc/liboctave/cp-idx.texi,
doc/liboctave/dae.texi, doc/liboctave/diffeq.texi,
doc/liboctave/error.texi, doc/liboctave/factor.texi,
doc/liboctave/fn-idx.texi, doc/liboctave/gpl.texi,
doc/liboctave/install.texi, doc/liboctave/intro.texi,
doc/liboctave/liboctave.texi, doc/liboctave/matvec.texi,
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doc/liboctave/preface.texi, doc/liboctave/quad.texi,
doc/liboctave/range.texi, doc/refcard/Makefile.am,
doc/refcard/refcard.tex, etc/HACKING, etc/NEWS.1, etc/NEWS.2,
etc/NEWS.3, etc/OLD-ChangeLogs/ChangeLog,
etc/OLD-ChangeLogs/doc-ChangeLog,
etc/OLD-ChangeLogs/scripts-ChangeLog,
etc/OLD-ChangeLogs/src-ChangeLog, etc/OLD-ChangeLogs/test-ChangeLog,
etc/PROJECTS, etc/README.Cygwin, etc/README.MacOS, etc/README.MinGW,
etc/README.gnuplot, etc/gdbinit, etc/icons/Makefile.am,
examples/@polynomial/end.m, examples/@polynomial/subsasgn.m,
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libgui/qterminal/libqterminal/unix/BlockArray.h,
libgui/qterminal/libqterminal/unix/Character.h,
libgui/qterminal/libqterminal/unix/CharacterColor.h,
libgui/qterminal/libqterminal/unix/Emulation.cpp,
libgui/qterminal/libqterminal/unix/Emulation.h,
libgui/qterminal/libqterminal/unix/Filter.cpp,
libgui/qterminal/libqterminal/unix/Filter.h,
libgui/qterminal/libqterminal/unix/History.cpp,
libgui/qterminal/libqterminal/unix/History.h,
libgui/qterminal/libqterminal/unix/KeyboardTranslator.cpp,
libgui/qterminal/libqterminal/unix/KeyboardTranslator.h,
libgui/qterminal/libqterminal/unix/LineFont.h,
libgui/qterminal/libqterminal/unix/QUnixTerminalImpl.cpp,
libgui/qterminal/libqterminal/unix/QUnixTerminalImpl.h,
libgui/qterminal/libqterminal/unix/Screen.cpp,
libgui/qterminal/libqterminal/unix/Screen.h,
libgui/qterminal/libqterminal/unix/ScreenWindow.cpp,
libgui/qterminal/libqterminal/unix/ScreenWindow.h,
libgui/qterminal/libqterminal/unix/TerminalCharacterDecoder.cpp,
libgui/qterminal/libqterminal/unix/TerminalCharacterDecoder.h,
libgui/qterminal/libqterminal/unix/Vt102Emulation.h,
libgui/qterminal/libqterminal/win32/QWinTerminalImpl.cpp,
libgui/qterminal/qterminal/main.cpp,
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libinterp/corefcn/lu.cc, libinterp/corefcn/oct-tex-parser.yy,
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scripts/time/weekday.m, src/Makefile.am, test/Makefile.am,
test/build-bc-overload-tests.sh, test/build-sparse-tests.sh,
test/jit.tst, test/line-continue.tst: Strip trailing whitespace.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 20 Jan 2015 08:26:57 -0500 |
parents | 8c33abdd2f9a |
children | 6a71e5030df5 |
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/* Copyright (C) 2009-2013 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/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #if defined (HAVE_FREETYPE) #if defined (HAVE_FONTCONFIG) #include <fontconfig/fontconfig.h> #endif #include <clocale> #include <cwchar> #include <iostream> #include <map> #include <utility> #include "singleton-cleanup.h" #include "error.h" #include "pr-output.h" #include "txt-eng-ft.h" // FIXME: maybe issue at most one warning per glyph/font/size/weight // combination. static void gripe_missing_glyph (FT_ULong c) { warning_with_id ("Octave:missing-glyph", "ft_render: skipping missing glyph for character '%x'", c); } static void gripe_glyph_render (FT_ULong c) { warning_with_id ("Octave:glyph-render", "ft_render: unable to render glyph for character '%x'", c); } #ifdef _MSC_VER // 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); 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!"); retval = false; } 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 ft_render. 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 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 ()) { #ifdef __WIN32__ 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 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) { ft_manager::font_destroyed (reinterpret_cast<FT_Face> (object)); } // --------------------------------------------------------------------------- ft_render::ft_render (void) : text_processor (), 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_render::~ft_render (void) { } void ft_render::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_render::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 = compute_line_xoffset (new_bbox); line_yoffset += (old_bbox(1) - (new_bbox(1) + new_bbox(3))); yoffset = 0; } break; } } int ft_render::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_render::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) = xmax (bbox(2), (*it)(2)); } } break; } } void ft_render::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.front (); 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_render::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_render: invalid bounding box, cannot render"); xoffset = line_yoffset = yoffset = 0; pixels = uint8NDArray (); } else { pixels = uint8NDArray (dim_vector (4, bbox(2), bbox(3)), static_cast<uint8_t> (0)); xoffset = compute_line_xoffset (line_bbox.front ()); line_yoffset = -bbox(1)-1; yoffset = 0; } break; default: ::error ("ft_render: invalid mode '%d'", mode); break; } } FT_UInt ft_render::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; gripe_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; gripe_missing_glyph (' '); } else push_new_line (); } else if (FT_Render_Glyph (face->glyph, FT_RENDER_MODE_NORMAL)) { glyph_index = 0; gripe_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 we allocated // the right amount of horizontal space in the bbox. if (x0 < 0) x0 = 0; for (int r = 0; r < bitmap.rows; r++) for (int c = 0; 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_render: 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; gripe_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) = xmax (bb(2), xoffset); } break; } } } return glyph_index; } void ft_render::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 (), curr = 0; mbstate_t ps; memset (&ps, 0, sizeof (ps)); // Initialize state to 0. wchar_t wc; while (n > 0) { size_t r = gnulib::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; glyph_index = process_character (wc, previous); if (wc == L'\n') previous = 0; else previous = glyph_index; } else { if (r != 0) ::warning ("ft_render: failed to decode string `%s' with " "locale `%s'", str.c_str (), std::setlocale (LC_CTYPE, 0)); break; } } } } void ft_render::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_render::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_render::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_render::visit (text_element_color& e) { if (mode == MODE_RENDER) set_color (e.get_color ()); } void ft_render::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_render::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_render::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_render::visit (text_element_symbol& e) { uint32_t code = e.get_symbol_code (); if (code != text_element_symbol::invalid_code && font.is_valid ()) process_character (code); else if (font.is_valid ()) ::warning ("ignoring unknown symbol: %d", e.get_symbol ()); } void ft_render::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 = xmax (xoffset, max_xoffset); } xoffset = max_xoffset; } void ft_render::reset (void) { set_mode (MODE_BBOX); set_color (Matrix (1, 3, 0.0)); } void ft_render::set_color (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_render::set_color: invalid color"); } uint8NDArray ft_render::render (text_element* elt, Matrix& box, int rotation) { set_mode (MODE_BBOX); elt->accept (*this); compute_bbox (); box = bbox; set_mode (MODE_RENDER); 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_render::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_render::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_render::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_render::text_to_pixels (const std::string& txt, uint8NDArray& pixels_, Matrix& box, int _halign, int valign, double rotation, const caseless_str& interpreter) { int rot_mode = rotation_to_mode (rotation); halign = _halign; text_element *elt = text_parser::parse (txt, interpreter); pixels_ = render (elt, box, rot_mode); delete elt; if (pixels_.numel () == 0) { // nothing to render return; } switch (halign) { default: box(0) = 0; break; case 1: box(0) = -box(2)/2; break; case 2: box(0) = -box(2); break; } switch (valign) { default: box(1) = 0; break; 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; } 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_render::ft_font::ft_font (const ft_font& ft) : name (ft.name), weight (ft.weight), angle (ft.angle), size (ft.size), face (0) { #if 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_render::ft_font& ft_render::ft_font::operator = (const ft_font& ft) { if (&ft != this) { name = ft.name; weight = ft.weight; angle = ft.angle; size = ft.size; if (face) { FT_Done_Face (face); face = 0; } #if 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_render::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_render: unable to set font size to %g", size); } else ::warning ("ft_render: unable to load appropriate font"); } return face; } #endif // HAVE_FREETYPE