diff options
Diffstat (limited to 'Build/source/texk/dvipng/dvipng-1.12/ft.c')
-rw-r--r-- | Build/source/texk/dvipng/dvipng-1.12/ft.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/Build/source/texk/dvipng/dvipng-1.12/ft.c b/Build/source/texk/dvipng/dvipng-1.12/ft.c new file mode 100644 index 00000000000..10274a6db6a --- /dev/null +++ b/Build/source/texk/dvipng/dvipng-1.12/ft.c @@ -0,0 +1,174 @@ +/* ft.c */ + +/************************************************************************ + + Part of the dvipng distribution + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation, either version 3 of the + License, or (at your option) any later version. + + This program 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this program. If not, see + <http://www.gnu.org/licenses/>. + + Copyright (C) 2002-2008 Jan-Åke Larsson + +************************************************************************/ + +#include "dvipng.h" +#ifdef HAVE_ALLOCA_H +# include <alloca.h> +#endif + +void LoadFT(int32_t c, struct char_entry * ptr) +{ + FT_Bitmap bitmap; + FT_UInt glyph_i; + int i,j,k; + unsigned char* bit; + + DEBUG_PRINT(DEBUG_FT,("\n LOAD FT CHAR\t%d (%d)",c,ptr->tfmw)); + if (currentfont->psfontmap!=NULL + && currentfont->psfontmap->encoding != NULL) { + DEBUG_PRINT(DEBUG_FT,(" %s",currentfont->psfontmap->encoding->charname[c])); + glyph_i = FT_Get_Name_Index(currentfont->face, + currentfont->psfontmap->encoding->charname[c]); + } else if (currentfont->psfontmap!=NULL + && currentfont->psfontmap->subfont != NULL) { + glyph_i = FT_Get_Char_Index( currentfont->face, + currentfont->psfontmap->subfont->charindex[c] ); + DEBUG_PRINT(DEBUG_FT,(" 0x%X",currentfont->psfontmap->subfont->charindex[c])); + } else + glyph_i = FT_Get_Char_Index( currentfont->face, c ); + if (FT_Load_Glyph( currentfont->face, glyph_i, + FT_LOAD_RENDER | FT_LOAD_TARGET_LIGHT ) + /* On some configurations (with FreeType <= 2.1.7) the above + fails, while the below works */ + && FT_Load_Glyph( currentfont->face, glyph_i, + FT_LOAD_RENDER | FT_LOAD_NO_HINTING )) + Fatal("cannot load FT char %d",c); + ptr->xOffset = -currentfont->face->glyph->bitmap_left*shrinkfactor; + ptr->yOffset = (currentfont->face->glyph->bitmap_top-1)*shrinkfactor; + bitmap=currentfont->face->glyph->bitmap; + DEBUG_PRINT(DEBUG_FT,(" (%dx%d)",bitmap.width,bitmap.rows)); + + if ((ptr->data = calloc(bitmap.width*bitmap.rows,sizeof(char))) == NULL) + Fatal("unable to allocate image space for char %c", (char)c); + ptr->w = bitmap.width; + ptr->h = bitmap.rows; + +#define GREYLEVELS 16 + DEBUG_PRINT(DEBUG_GLYPH,("\nDRAW GLYPH %d\n", (int)c)); + bit=ptr->data; + for(i=0;i<bitmap.rows;i++) { + for(j=0;j<bitmap.width;j++) { + k=bitmap.buffer[i*bitmap.pitch+j]/(256/GREYLEVELS)*17; + /* k=(bitmap.buffer[i*bitmap.pitch+j]+1)/16; */ + /* k= k>0 ? k*16-1 : 0; */ + DEBUG_PRINT(DEBUG_GLYPH,("%3u ",k)); + bit[i*bitmap.width+j]=k; + } + DEBUG_PRINT(DEBUG_GLYPH,("|\n")); + } +} + +bool InitFT(struct font_entry * tfontp) +{ + int error; + + if (libfreetype==NULL) { + if (FT_Init_FreeType( &libfreetype )) { + Warning("an error occured during freetype initialisation, disabling it"); + option_flags &= ~USE_FREETYPE; + return(false); + } +# ifdef DEBUG + else { + FT_Int amajor, aminor, apatch; + + DEBUG_PRINT(DEBUG_FT,("\n COMPILED WITH FREETYPE %d.%d.%d", + FREETYPE_MAJOR, FREETYPE_MINOR, FREETYPE_PATCH)); +# ifdef HAVE_FT_LIBRARY_VERSION + FT_Library_Version( libfreetype, &amajor, &aminor, &apatch ); + DEBUG_PRINT(DEBUG_FT,("\n USING LIBFT %d.%d.%d", + amajor, aminor, apatch)); +# endif + } +# endif + } + DEBUG_PRINT((DEBUG_DVI|DEBUG_FT),("\n OPEN FT FONT:\t'%s'", tfontp->name)); + error = FT_New_Face( libfreetype, tfontp->name, 0, &tfontp->face ); + if (error == FT_Err_Unknown_File_Format) { + Warning("font file %s has unknown format", tfontp->name); + return(false); + } else if (error) { + Warning("font file %s could not be opened", tfontp->name); + return(false); + } + Message(BE_VERBOSE,"<%s>", tfontp->name); + if (tfontp->psfontmap != NULL && tfontp->psfontmap->subfont != NULL) + error=FT_Select_Charmap(tfontp->face, tfontp->psfontmap->subfont->encoding); + else if (tfontp->psfontmap == NULL || tfontp->psfontmap->encoding == NULL) +#ifndef FT_ENCODING_ADOBE_CUSTOM +# define FT_ENCODING_ADOBE_CUSTOM ft_encoding_adobe_custom +# define FT_ENCODING_ADOBE_STANDARD ft_encoding_adobe_standard +#endif + error=FT_Select_Charmap(tfontp->face, FT_ENCODING_ADOBE_CUSTOM); + if (error) { + Warning("unable to set font encoding for %s", tfontp->name); + if(FT_Select_Charmap( tfontp->face, FT_ENCODING_ADOBE_STANDARD )) { + Warning("unable to set fallback font encoding for %s", tfontp->name); + return(false); + } + } + if (FT_Set_Char_Size( tfontp->face, /* handle to face object */ + 0, /* char_width in 1/64th of points */ + ((int64_t)tfontp->d*64*7200)/7227/65536, + /* char_height in 1/64th of _big_points, + not TeX points */ + tfontp->dpi/shrinkfactor, /* horizontal resolution */ + tfontp->dpi/shrinkfactor )) /* vertical resolution */ { + Warning("unable to set font size for %s", tfontp->name); + return(false); + } + if (tfontp->psfontmap!=NULL) + FT_Set_Transform(tfontp->face, tfontp->psfontmap->ft_transformp, NULL); + tfontp->type = FONT_TYPE_FT; + return(true); +} + + +static void UnLoadFT(struct char_entry *ptr) +{ + if (ptr->data!=NULL) + free(ptr->data); + ptr->data=NULL; +} + + +void DoneFT(struct font_entry *tfontp) +{ + int c=0; + + int error = FT_Done_Face( tfontp->face ); + if (error) + Warning("font file %s could not be closed", tfontp->name); + while(c<NFNTCHARS) { + if (tfontp->chr[c]!=NULL) { + UnLoadFT((struct char_entry*)tfontp->chr[c]); + free(tfontp->chr[c]); + tfontp->chr[c]=NULL; + } + c++; + } + tfontp->name[0]='\0'; +} + + |