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- #include "freetype/freetype.h"
- #include "freetype.h"
- static char* fterrstr(int);
- char*
- ftnewface(char *path, int index, FTface *f, FTfaceinfo *finfo)
- {
- FT_Library ft_lib;
- FT_Face ft_face;
- char *err;
- err = fterrstr(FT_Init_FreeType(&ft_lib));
- if (err != nil)
- return err;
- err = fterrstr(FT_New_Face(ft_lib, path, index, &ft_face));
- if (err != nil) {
- FT_Done_FreeType(ft_lib);
- return err;
- }
- f->ft_lib = ft_lib;
- f->ft_face = ft_face;
- finfo->nfaces = ft_face->num_faces;
- finfo->index = ft_face->face_index;
- finfo->style = ft_face->style_flags;
- finfo->height = (FT_MulFix(ft_face->height, ft_face->size->metrics.y_scale)+32)/64;
- finfo->ascent = (FT_MulFix(ft_face->ascender, ft_face->size->metrics.y_scale)+32)/64;
- finfo->familyname = ft_face->family_name;
- finfo->stylename = ft_face->style_name;
- return nil;
- }
- char*
- ftloadmemface(void *buf, int nbytes, int index, FTface *f, FTfaceinfo *finfo)
- {
- USED(buf);
- USED(f);
- USED(finfo);
- return "not implemented";
- }
- char*
- ftsetcharsize(FTface f, int pt, int hdpi, int vdpi, FTfaceinfo *finfo)
- {
- FT_Face ft_face = f.ft_face;
- char *err;
- err = fterrstr(FT_Set_Char_Size(ft_face, 0, pt, hdpi, vdpi));
- if (err != nil)
- return err;
- finfo->height = (FT_MulFix(ft_face->height, ft_face->size->metrics.y_scale)+32)/64;
- finfo->ascent = (FT_MulFix(ft_face->ascender, ft_face->size->metrics.y_scale)+32)/64;
- return nil;
- }
- void
- ftsettransform(FTface f, FTmatrix *m, FTvector *v)
- {
- /* FTMatrix and FTVector are compatible with FT_Matrix and FT_Vector */
- FT_Set_Transform(f.ft_face, (FT_Matrix*)m, (FT_Vector*)v);
- }
- int
- fthaschar(FTface f, int c)
- {
- return FT_Get_Char_Index(f.ft_face, c) != 0;
- }
- char*
- ftloadglyph(FTface f, int ix, FTglyph *g)
- {
- FT_Face ft_face = f.ft_face;
- FT_GlyphSlot ft_glyph;
- char *err;
- ix = FT_Get_Char_Index(ft_face, ix);
- err = fterrstr(FT_Load_Glyph(ft_face, ix, FT_LOAD_NO_BITMAP|FT_LOAD_RENDER|FT_LOAD_CROP_BITMAP));
- if (err != nil)
- return err;
- ft_glyph = ft_face->glyph;
- g->top = ft_glyph->bitmap_top;
- g->left = ft_glyph->bitmap_left;
- g->height = ft_glyph->bitmap.rows;
- g->width = ft_glyph->bitmap.width;
- g->advx = ft_glyph->advance.x;
- g->advy = ft_glyph->advance.y;
- g->bpr = ft_glyph->bitmap.pitch;
- g->bitmap = ft_glyph->bitmap.buffer;
- return nil;
- }
- void
- ftdoneface(FTface f)
- {
- if (f.ft_face != nil)
- FT_Done_Face(f.ft_face);
- if (f.ft_lib != nil)
- FT_Done_FreeType(f.ft_lib);
- }
- /*
- * get the freetype error strings
- */
- typedef struct FTerr FTerr;
- struct FTerr {
- int code;
- char* text;
- };
- #define FT_NOERRORDEF_(l,c,t)
- #define FT_ERRORDEF_(l,c,t) c,t,
- static FTerr fterrs[] = {
- #include "freetype/fterrdef.h"
- -1, "",
- };
- static char*
- fterrstr(int code)
- {
- int i;
- if (code == 0)
- return nil;
- for (i = 0; fterrs[i].code > 0; i++) {
- if (fterrs[i].code == code)
- return fterrs[i].text;
- }
- return "unknown FreeType error";
- }
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