//---------------------------------------------------------------------------- // Anti-Grain Geometry (AGG) - Version 2.5 // A high quality rendering engine for C++ // Copyright (C) 2002-2006 Maxim Shemanarev // Contact: mcseem@antigrain.com // mcseemagg@yahoo.com // http://antigrain.com // // AGG 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 2 // of the License, or (at your option) any later version. // // AGG 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 AGG; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, // MA 02110-1301, USA. //---------------------------------------------------------------------------- #include <stdio.h> #include "agg_font_freetype.h" #include "agg_bitset_iterator.h" #include "agg_renderer_scanline.h" namespace agg { //------------------------------------------------------------------------------ // // This code implements the AUTODIN II polynomial // The variable corresponding to the macro argument "crc" should // be an unsigned long. // Oroginal code by Spencer Garrett <srg@quick.com> // // generated using the AUTODIN II polynomial // x^32 + x^26 + x^23 + x^22 + x^16 + // x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + 1 // //------------------------------------------------------------------------------ static const unsigned crc32tab[256] = { 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, }; //------------------------------------------------------------------------------ static unsigned calc_crc32(const unsigned char* buf, unsigned size) { unsigned crc = (unsigned)~0; const unsigned char* p; unsigned len = 0; unsigned nr = size; for (len += nr, p = buf; nr--; ++p) { crc = (crc >> 8) ^ crc32tab[(crc ^ *p) & 0xff]; } return ~crc; } //------------------------------------------------------------------------ static inline int dbl_to_plain_fx(double d) { return int(d * 65536.0); } //------------------------------------------------------------------------ static inline double int26p6_to_dbl(int p) { return double(p) / 64.0; } //------------------------------------------------------------------------ static inline int dbl_to_int26p6(double p) { return int(p * 64.0 + 0.5); } //------------------------------------------------------------------------ template<class PathStorage> bool decompose_ft_outline(const FT_Outline& outline, bool flip_y, const trans_affine& mtx, PathStorage& path) { typedef typename PathStorage::value_type value_type; FT_Vector v_last; FT_Vector v_control; FT_Vector v_start; double x1, y1, x2, y2, x3, y3; FT_Vector* point; FT_Vector* limit; char* tags; int n; // index of contour in outline int first; // index of first point in contour char tag; // current point's state first = 0; for(n = 0; n < outline.n_contours; n++) { int last; // index of last point in contour last = outline.contours[n]; limit = outline.points + last; v_start = outline.points[first]; v_last = outline.points[last]; v_control = v_start; point = outline.points + first; tags = outline.tags + first; tag = FT_CURVE_TAG(tags[0]); // A contour cannot start with a cubic control point! if(tag == FT_CURVE_TAG_CUBIC) return false; // check first point to determine origin if( tag == FT_CURVE_TAG_CONIC) { // first point is conic control. Yes, this happens. if(FT_CURVE_TAG(outline.tags[last]) == FT_CURVE_TAG_ON) { // start at last point if it is on the curve v_start = v_last; limit--; } else { // if both first and last points are conic, // start at their middle and record its position // for closure v_start.x = (v_start.x + v_last.x) / 2; v_start.y = (v_start.y + v_last.y) / 2; v_last = v_start; } point--; tags--; } x1 = int26p6_to_dbl(v_start.x); y1 = int26p6_to_dbl(v_start.y); if(flip_y) y1 = -y1; mtx.transform(&x1, &y1); path.move_to(value_type(dbl_to_int26p6(x1)), value_type(dbl_to_int26p6(y1))); while(point < limit) { point++; tags++; tag = FT_CURVE_TAG(tags[0]); switch(tag) { case FT_CURVE_TAG_ON: // emit a single line_to { x1 = int26p6_to_dbl(point->x); y1 = int26p6_to_dbl(point->y); if(flip_y) y1 = -y1; mtx.transform(&x1, &y1); path.line_to(value_type(dbl_to_int26p6(x1)), value_type(dbl_to_int26p6(y1))); //path.line_to(conv(point->x), flip_y ? -conv(point->y) : conv(point->y)); continue; } case FT_CURVE_TAG_CONIC: // consume conic arcs { v_control.x = point->x; v_control.y = point->y; Do_Conic: if(point < limit) { FT_Vector vec; FT_Vector v_middle; point++; tags++; tag = FT_CURVE_TAG(tags[0]); vec.x = point->x; vec.y = point->y; if(tag == FT_CURVE_TAG_ON) { x1 = int26p6_to_dbl(v_control.x); y1 = int26p6_to_dbl(v_control.y); x2 = int26p6_to_dbl(vec.x); y2 = int26p6_to_dbl(vec.y); if(flip_y) { y1 = -y1; y2 = -y2; } mtx.transform(&x1, &y1); mtx.transform(&x2, &y2); path.curve3(value_type(dbl_to_int26p6(x1)), value_type(dbl_to_int26p6(y1)), value_type(dbl_to_int26p6(x2)), value_type(dbl_to_int26p6(y2))); continue; } if(tag != FT_CURVE_TAG_CONIC) return false; v_middle.x = (v_control.x + vec.x) / 2; v_middle.y = (v_control.y + vec.y) / 2; x1 = int26p6_to_dbl(v_control.x); y1 = int26p6_to_dbl(v_control.y); x2 = int26p6_to_dbl(v_middle.x); y2 = int26p6_to_dbl(v_middle.y); if(flip_y) { y1 = -y1; y2 = -y2; } mtx.transform(&x1, &y1); mtx.transform(&x2, &y2); path.curve3(value_type(dbl_to_int26p6(x1)), value_type(dbl_to_int26p6(y1)), value_type(dbl_to_int26p6(x2)), value_type(dbl_to_int26p6(y2))); //path.curve3(conv(v_control.x), // flip_y ? -conv(v_control.y) : conv(v_control.y), // conv(v_middle.x), // flip_y ? -conv(v_middle.y) : conv(v_middle.y)); v_control = vec; goto Do_Conic; } x1 = int26p6_to_dbl(v_control.x); y1 = int26p6_to_dbl(v_control.y); x2 = int26p6_to_dbl(v_start.x); y2 = int26p6_to_dbl(v_start.y); if(flip_y) { y1 = -y1; y2 = -y2; } mtx.transform(&x1, &y1); mtx.transform(&x2, &y2); path.curve3(value_type(dbl_to_int26p6(x1)), value_type(dbl_to_int26p6(y1)), value_type(dbl_to_int26p6(x2)), value_type(dbl_to_int26p6(y2))); //path.curve3(conv(v_control.x), // flip_y ? -conv(v_control.y) : conv(v_control.y), // conv(v_start.x), // flip_y ? -conv(v_start.y) : conv(v_start.y)); goto Close; } default: // FT_CURVE_TAG_CUBIC { FT_Vector vec1, vec2; if(point + 1 > limit || FT_CURVE_TAG(tags[1]) != FT_CURVE_TAG_CUBIC) { return false; } vec1.x = point[0].x; vec1.y = point[0].y; vec2.x = point[1].x; vec2.y = point[1].y; point += 2; tags += 2; if(point <= limit) { FT_Vector vec; vec.x = point->x; vec.y = point->y; x1 = int26p6_to_dbl(vec1.x); y1 = int26p6_to_dbl(vec1.y); x2 = int26p6_to_dbl(vec2.x); y2 = int26p6_to_dbl(vec2.y); x3 = int26p6_to_dbl(vec.x); y3 = int26p6_to_dbl(vec.y); if(flip_y) { y1 = -y1; y2 = -y2; y3 = -y3; } mtx.transform(&x1, &y1); mtx.transform(&x2, &y2); mtx.transform(&x3, &y3); path.curve4(value_type(dbl_to_int26p6(x1)), value_type(dbl_to_int26p6(y1)), value_type(dbl_to_int26p6(x2)), value_type(dbl_to_int26p6(y2)), value_type(dbl_to_int26p6(x3)), value_type(dbl_to_int26p6(y3))); //path.curve4(conv(vec1.x), // flip_y ? -conv(vec1.y) : conv(vec1.y), // conv(vec2.x), // flip_y ? -conv(vec2.y) : conv(vec2.y), // conv(vec.x), // flip_y ? -conv(vec.y) : conv(vec.y)); continue; } x1 = int26p6_to_dbl(vec1.x); y1 = int26p6_to_dbl(vec1.y); x2 = int26p6_to_dbl(vec2.x); y2 = int26p6_to_dbl(vec2.y); x3 = int26p6_to_dbl(v_start.x); y3 = int26p6_to_dbl(v_start.y); if(flip_y) { y1 = -y1; y2 = -y2; y3 = -y3; } mtx.transform(&x1, &y1); mtx.transform(&x2, &y2); mtx.transform(&x3, &y3); path.curve4(value_type(dbl_to_int26p6(x1)), value_type(dbl_to_int26p6(y1)), value_type(dbl_to_int26p6(x2)), value_type(dbl_to_int26p6(y2)), value_type(dbl_to_int26p6(x3)), value_type(dbl_to_int26p6(y3))); //path.curve4(conv(vec1.x), // flip_y ? -conv(vec1.y) : conv(vec1.y), // conv(vec2.x), // flip_y ? -conv(vec2.y) : conv(vec2.y), // conv(v_start.x), // flip_y ? -conv(v_start.y) : conv(v_start.y)); goto Close; } } } path.close_polygon(); Close: first = last + 1; } return true; } //------------------------------------------------------------------------ template<class Scanline, class ScanlineStorage> void decompose_ft_bitmap_mono(const FT_Bitmap& bitmap, int x, int y, bool flip_y, Scanline& sl, ScanlineStorage& storage) { int i; const int8u* buf = (const int8u*)bitmap.buffer; int pitch = bitmap.pitch; sl.reset(x, x + bitmap.width); storage.prepare(); if(flip_y) { buf += bitmap.pitch * (bitmap.rows - 1); y += bitmap.rows; pitch = -pitch; } for(i = 0; i < bitmap.rows; i++) { sl.reset_spans(); bitset_iterator bits(buf, 0); int j; for(j = 0; j < bitmap.width; j++) { if(bits.bit()) sl.add_cell(x + j, cover_full); ++bits; } buf += pitch; if(sl.num_spans()) { sl.finalize(y - i - 1); storage.render(sl); } } } //------------------------------------------------------------------------ template<class Rasterizer, class Scanline, class ScanlineStorage> void decompose_ft_bitmap_gray8(const FT_Bitmap& bitmap, int x, int y, bool flip_y, Rasterizer& ras, Scanline& sl, ScanlineStorage& storage) { int i, j; const int8u* buf = (const int8u*)bitmap.buffer; int pitch = bitmap.pitch; sl.reset(x, x + bitmap.width); storage.prepare(); if(flip_y) { buf += bitmap.pitch * (bitmap.rows - 1); y += bitmap.rows; pitch = -pitch; } for(i = 0; i < bitmap.rows; i++) { sl.reset_spans(); const int8u* p = buf; for(j = 0; j < bitmap.width; j++) { if(*p) sl.add_cell(x + j, ras.apply_gamma(*p)); ++p; } buf += pitch; if(sl.num_spans()) { sl.finalize(y - i - 1); storage.render(sl); } } } //------------------------------------------------------------------------ font_engine_freetype_base::~font_engine_freetype_base() { unsigned i; for(i = 0; i < m_num_faces; ++i) { delete [] m_face_names[i]; FT_Done_Face(m_faces[i]); } delete [] m_face_names; delete [] m_faces; delete [] m_signature; if(m_library_initialized) FT_Done_FreeType(m_library); } //------------------------------------------------------------------------ font_engine_freetype_base::font_engine_freetype_base(bool flag32, unsigned max_faces) : m_flag32(flag32), m_change_stamp(0), m_last_error(0), m_name(0), m_name_len(256-16-1), m_face_index(0), m_char_map(FT_ENCODING_NONE), m_signature(new char [256+256-16]), m_height(0), m_width(0), m_hinting(true), m_flip_y(false), m_library_initialized(false), m_library(0), m_faces(new FT_Face [max_faces]), m_face_names(new char* [max_faces]), m_num_faces(0), m_max_faces(max_faces), m_cur_face(0), m_resolution(0), m_glyph_rendering(glyph_ren_native_gray8), m_glyph_index(0), m_data_size(0), m_data_type(glyph_data_invalid), m_bounds(1,1,0,0), m_advance_x(0.0), m_advance_y(0.0), m_path16(), m_path32(), m_curves16(m_path16), m_curves32(m_path32), m_scanline_aa(), m_scanline_bin(), m_scanlines_aa(), m_scanlines_bin(), m_rasterizer() { m_curves16.approximation_scale(4.0); m_curves32.approximation_scale(4.0); m_last_error = FT_Init_FreeType(&m_library); if(m_last_error == 0) m_library_initialized = true; } //------------------------------------------------------------------------ void font_engine_freetype_base::resolution(unsigned dpi) { m_resolution = dpi; update_char_size(); } //------------------------------------------------------------------------ int font_engine_freetype_base::find_face(const char* face_name) const { unsigned i; for(i = 0; i < m_num_faces; ++i) { if(strcmp(face_name, m_face_names[i]) == 0) return i; } return -1; } //------------------------------------------------------------------------ double font_engine_freetype_base::ascender() const { if(m_cur_face) { return m_cur_face->ascender * height() / m_cur_face->height; } return 0.0; } //------------------------------------------------------------------------ double font_engine_freetype_base::descender() const { if(m_cur_face) { return m_cur_face->descender * height() / m_cur_face->height; } return 0.0; } //------------------------------------------------------------------------ bool font_engine_freetype_base::load_font(const char* font_name, unsigned face_index, glyph_rendering ren_type, const char* font_mem, const long font_mem_size) { bool ret = false; if(m_library_initialized) { m_last_error = 0; int idx = find_face(font_name); if(idx >= 0) { m_cur_face = m_faces[idx]; m_name = m_face_names[idx]; } else { if(m_num_faces >= m_max_faces) { delete [] m_face_names[0]; FT_Done_Face(m_faces[0]); memcpy(m_faces, m_faces + 1, (m_max_faces - 1) * sizeof(FT_Face)); memcpy(m_face_names, m_face_names + 1, (m_max_faces - 1) * sizeof(char*)); m_num_faces = m_max_faces - 1; } if (font_mem && font_mem_size) { m_last_error = FT_New_Memory_Face(m_library, (const FT_Byte*)font_mem, font_mem_size, face_index, &m_faces[m_num_faces]); } else { m_last_error = FT_New_Face(m_library, font_name, face_index, &m_faces[m_num_faces]); } if(m_last_error == 0) { m_face_names[m_num_faces] = new char [strlen(font_name) + 1]; strcpy(m_face_names[m_num_faces], font_name); m_cur_face = m_faces[m_num_faces]; m_name = m_face_names[m_num_faces]; ++m_num_faces; } else { m_face_names[m_num_faces] = 0; m_cur_face = 0; m_name = 0; } } if(m_last_error == 0) { ret = true; switch(ren_type) { case glyph_ren_native_mono: m_glyph_rendering = glyph_ren_native_mono; break; case glyph_ren_native_gray8: m_glyph_rendering = glyph_ren_native_gray8; break; case glyph_ren_outline: if(FT_IS_SCALABLE(m_cur_face)) { m_glyph_rendering = glyph_ren_outline; } else { m_glyph_rendering = glyph_ren_native_gray8; } break; case glyph_ren_agg_mono: if(FT_IS_SCALABLE(m_cur_face)) { m_glyph_rendering = glyph_ren_agg_mono; } else { m_glyph_rendering = glyph_ren_native_mono; } break; case glyph_ren_agg_gray8: if(FT_IS_SCALABLE(m_cur_face)) { m_glyph_rendering = glyph_ren_agg_gray8; } else { m_glyph_rendering = glyph_ren_native_gray8; } break; } update_signature(); } } return ret; } //------------------------------------------------------------------------ bool font_engine_freetype_base::attach(const char* file_name) { if(m_cur_face) { m_last_error = FT_Attach_File(m_cur_face, file_name); return m_last_error == 0; } return false; } //------------------------------------------------------------------------ unsigned font_engine_freetype_base::num_faces() const { if(m_cur_face) { return m_cur_face->num_faces; } return 0; } //------------------------------------------------------------------------ bool font_engine_freetype_base::char_map(FT_Encoding char_map) { if(m_cur_face) { m_last_error = FT_Select_Charmap(m_cur_face, m_char_map); if(m_last_error == 0) { update_signature(); return true; } } return false; } //------------------------------------------------------------------------ bool font_engine_freetype_base::height(double h) { m_height = int(h * 64.0); if(m_cur_face) { update_char_size(); return true; } return false; } //------------------------------------------------------------------------ bool font_engine_freetype_base::width(double w) { m_width = int(w * 64.0); if(m_cur_face) { update_char_size(); return true; } return false; } //------------------------------------------------------------------------ void font_engine_freetype_base::hinting(bool h) { m_hinting = h; if(m_cur_face) { update_signature(); } } //------------------------------------------------------------------------ void font_engine_freetype_base::flip_y(bool f) { m_flip_y = f; if(m_cur_face) { update_signature(); } } //------------------------------------------------------------------------ void font_engine_freetype_base::transform(const trans_affine& affine) { m_affine = affine; if(m_cur_face) { update_signature(); } } //------------------------------------------------------------------------ void font_engine_freetype_base::update_signature() { if(m_cur_face && m_name) { unsigned name_len = strlen(m_name); if(name_len > m_name_len) { delete [] m_signature; m_signature = new char [name_len + 32 + 256]; m_name_len = name_len + 32 - 1; } unsigned gamma_hash = 0; if(m_glyph_rendering == glyph_ren_native_gray8 || m_glyph_rendering == glyph_ren_agg_mono || m_glyph_rendering == glyph_ren_agg_gray8) { unsigned char gamma_table[rasterizer_scanline_aa<>::aa_scale]; unsigned i; for(i = 0; i < rasterizer_scanline_aa<>::aa_scale; ++i) { gamma_table[i] = m_rasterizer.apply_gamma(i); } gamma_hash = calc_crc32(gamma_table, sizeof(gamma_table)); } sprintf(m_signature, "%s,%u,%d,%d,%d:%dx%d,%d,%d,%08X", m_name, m_char_map, m_face_index, int(m_glyph_rendering), m_resolution, m_height, m_width, int(m_hinting), int(m_flip_y), gamma_hash); if(m_glyph_rendering == glyph_ren_outline || m_glyph_rendering == glyph_ren_agg_mono || m_glyph_rendering == glyph_ren_agg_gray8) { double mtx[6]; char buf[100]; m_affine.store_to(mtx); sprintf(buf, ",%08X%08X%08X%08X%08X%08X", dbl_to_plain_fx(mtx[0]), dbl_to_plain_fx(mtx[1]), dbl_to_plain_fx(mtx[2]), dbl_to_plain_fx(mtx[3]), dbl_to_plain_fx(mtx[4]), dbl_to_plain_fx(mtx[5])); strcat(m_signature, buf); } ++m_change_stamp; } } //------------------------------------------------------------------------ void font_engine_freetype_base::update_char_size() { if(m_cur_face) { if(m_resolution) { FT_Set_Char_Size(m_cur_face, m_width, // char_width in 1/64th of points m_height, // char_height in 1/64th of points m_resolution, // horizontal device resolution m_resolution); // vertical device resolution } else { FT_Set_Pixel_Sizes(m_cur_face, m_width >> 6, // pixel_width m_height >> 6); // pixel_height } update_signature(); } } //------------------------------------------------------------------------ bool font_engine_freetype_base::prepare_glyph(unsigned glyph_code) { m_glyph_index = FT_Get_Char_Index(m_cur_face, glyph_code); m_last_error = FT_Load_Glyph(m_cur_face, m_glyph_index, m_hinting ? FT_LOAD_DEFAULT : FT_LOAD_NO_HINTING); // m_hinting ? FT_LOAD_FORCE_AUTOHINT : FT_LOAD_NO_HINTING); if(m_last_error == 0) { switch(m_glyph_rendering) { case glyph_ren_native_mono: m_last_error = FT_Render_Glyph(m_cur_face->glyph, FT_RENDER_MODE_MONO); if(m_last_error == 0) { decompose_ft_bitmap_mono(m_cur_face->glyph->bitmap, m_cur_face->glyph->bitmap_left, m_flip_y ? -m_cur_face->glyph->bitmap_top : m_cur_face->glyph->bitmap_top, m_flip_y, m_scanline_bin, m_scanlines_bin); m_bounds.x1 = m_scanlines_bin.min_x(); m_bounds.y1 = m_scanlines_bin.min_y(); m_bounds.x2 = m_scanlines_bin.max_x() + 1; m_bounds.y2 = m_scanlines_bin.max_y() + 1; m_data_size = m_scanlines_bin.byte_size(); m_data_type = glyph_data_mono; m_advance_x = int26p6_to_dbl(m_cur_face->glyph->advance.x); m_advance_y = int26p6_to_dbl(m_cur_face->glyph->advance.y); return true; } break; case glyph_ren_native_gray8: m_last_error = FT_Render_Glyph(m_cur_face->glyph, FT_RENDER_MODE_NORMAL); if(m_last_error == 0) { decompose_ft_bitmap_gray8(m_cur_face->glyph->bitmap, m_cur_face->glyph->bitmap_left, m_flip_y ? -m_cur_face->glyph->bitmap_top : m_cur_face->glyph->bitmap_top, m_flip_y, m_rasterizer, m_scanline_aa, m_scanlines_aa); m_bounds.x1 = m_scanlines_aa.min_x(); m_bounds.y1 = m_scanlines_aa.min_y(); m_bounds.x2 = m_scanlines_aa.max_x() + 1; m_bounds.y2 = m_scanlines_aa.max_y() + 1; m_data_size = m_scanlines_aa.byte_size(); m_data_type = glyph_data_gray8; m_advance_x = int26p6_to_dbl(m_cur_face->glyph->advance.x); m_advance_y = int26p6_to_dbl(m_cur_face->glyph->advance.y); return true; } break; case glyph_ren_outline: if(m_last_error == 0) { if(m_flag32) { m_path32.remove_all(); if(decompose_ft_outline(m_cur_face->glyph->outline, m_flip_y, m_affine, m_path32)) { rect_d bnd = m_path32.bounding_rect(); m_data_size = m_path32.byte_size(); m_data_type = glyph_data_outline; m_bounds.x1 = int(floor(bnd.x1)); m_bounds.y1 = int(floor(bnd.y1)); m_bounds.x2 = int(ceil(bnd.x2)); m_bounds.y2 = int(ceil(bnd.y2)); m_advance_x = int26p6_to_dbl(m_cur_face->glyph->advance.x); m_advance_y = int26p6_to_dbl(m_cur_face->glyph->advance.y); m_affine.transform(&m_advance_x, &m_advance_y); return true; } } else { m_path16.remove_all(); if(decompose_ft_outline(m_cur_face->glyph->outline, m_flip_y, m_affine, m_path16)) { rect_d bnd = m_path16.bounding_rect(); m_data_size = m_path16.byte_size(); m_data_type = glyph_data_outline; m_bounds.x1 = int(floor(bnd.x1)); m_bounds.y1 = int(floor(bnd.y1)); m_bounds.x2 = int(ceil(bnd.x2)); m_bounds.y2 = int(ceil(bnd.y2)); m_advance_x = int26p6_to_dbl(m_cur_face->glyph->advance.x); m_advance_y = int26p6_to_dbl(m_cur_face->glyph->advance.y); m_affine.transform(&m_advance_x, &m_advance_y); return true; } } } return false; case glyph_ren_agg_mono: if(m_last_error == 0) { m_rasterizer.reset(); if(m_flag32) { m_path32.remove_all(); decompose_ft_outline(m_cur_face->glyph->outline, m_flip_y, m_affine, m_path32); m_rasterizer.add_path(m_curves32); } else { m_path16.remove_all(); decompose_ft_outline(m_cur_face->glyph->outline, m_flip_y, m_affine, m_path16); m_rasterizer.add_path(m_curves16); } m_scanlines_bin.prepare(); // Remove all render_scanlines(m_rasterizer, m_scanline_bin, m_scanlines_bin); m_bounds.x1 = m_scanlines_bin.min_x(); m_bounds.y1 = m_scanlines_bin.min_y(); m_bounds.x2 = m_scanlines_bin.max_x() + 1; m_bounds.y2 = m_scanlines_bin.max_y() + 1; m_data_size = m_scanlines_bin.byte_size(); m_data_type = glyph_data_mono; m_advance_x = int26p6_to_dbl(m_cur_face->glyph->advance.x); m_advance_y = int26p6_to_dbl(m_cur_face->glyph->advance.y); m_affine.transform(&m_advance_x, &m_advance_y); return true; } return false; case glyph_ren_agg_gray8: if(m_last_error == 0) { m_rasterizer.reset(); if(m_flag32) { m_path32.remove_all(); decompose_ft_outline(m_cur_face->glyph->outline, m_flip_y, m_affine, m_path32); m_rasterizer.add_path(m_curves32); } else { m_path16.remove_all(); decompose_ft_outline(m_cur_face->glyph->outline, m_flip_y, m_affine, m_path16); m_rasterizer.add_path(m_curves16); } m_scanlines_aa.prepare(); // Remove all render_scanlines(m_rasterizer, m_scanline_aa, m_scanlines_aa); m_bounds.x1 = m_scanlines_aa.min_x(); m_bounds.y1 = m_scanlines_aa.min_y(); m_bounds.x2 = m_scanlines_aa.max_x() + 1; m_bounds.y2 = m_scanlines_aa.max_y() + 1; m_data_size = m_scanlines_aa.byte_size(); m_data_type = glyph_data_gray8; m_advance_x = int26p6_to_dbl(m_cur_face->glyph->advance.x); m_advance_y = int26p6_to_dbl(m_cur_face->glyph->advance.y); m_affine.transform(&m_advance_x, &m_advance_y); return true; } return false; } } return false; } //------------------------------------------------------------------------ void font_engine_freetype_base::write_glyph_to(int8u* data) const { if(data && m_data_size) { switch(m_data_type) { default: return; case glyph_data_mono: m_scanlines_bin.serialize(data); break; case glyph_data_gray8: m_scanlines_aa.serialize(data); break; case glyph_data_outline: if(m_flag32) { m_path32.serialize(data); } else { m_path16.serialize(data); } break; case glyph_data_invalid: break; } } } //------------------------------------------------------------------------ bool font_engine_freetype_base::add_kerning(unsigned first, unsigned second, double* x, double* y) { if(m_cur_face && first && second && FT_HAS_KERNING(m_cur_face)) { FT_Vector delta; FT_Get_Kerning(m_cur_face, first, second, FT_KERNING_DEFAULT, &delta); double dx = int26p6_to_dbl(delta.x); double dy = int26p6_to_dbl(delta.y); if(m_glyph_rendering == glyph_ren_outline || m_glyph_rendering == glyph_ren_agg_mono || m_glyph_rendering == glyph_ren_agg_gray8) { m_affine.transform_2x2(&dx, &dy); } *x += dx; *y += dy; return true; } return false; } } |