Move ascii.h and widthspec.h generation to a separate build-time-only
tool.
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
66345b5071
commit
c6b066f2e9
5 changed files with 422 additions and 125 deletions
253
util/grub-gen-asciih.c
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253
util/grub-gen-asciih.c
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_TRUETYPE_TAGS_H
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#include FT_TRUETYPE_TABLES_H
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#include <freetype/ftsynth.h>
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#undef __FTERRORS_H__
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#define FT_ERROR_START_LIST const char *ft_errmsgs[] = {
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#define FT_ERRORDEF(e, v, s) [e] = s,
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#define FT_ERROR_END_LIST };
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#include FT_ERRORS_H
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#define GRUB_FONT_DEFAULT_SIZE 16
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#define ARRAY_SIZE(array) (sizeof (array) / sizeof (array[0]))
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struct grub_glyph_info
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{
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int width;
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int height;
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int x_ofs;
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int y_ofs;
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int device_width;
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int bitmap_size;
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unsigned char *bitmap;
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};
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static void
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add_pixel (unsigned char **data, int *mask, int not_blank)
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{
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if (*mask == 0)
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{
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(*data)++;
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**data = 0;
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*mask = 128;
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}
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if (not_blank)
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**data |= *mask;
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*mask >>= 1;
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}
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static void
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add_glyph (FT_UInt glyph_idx, FT_Face face,
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unsigned int char_code,
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struct grub_glyph_info *glyph_info)
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{
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int width, height;
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int cuttop, cutbottom, cutleft, cutright;
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unsigned char *data;
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int mask, i, j, bitmap_size;
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FT_GlyphSlot glyph;
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int flag = FT_LOAD_RENDER | FT_LOAD_MONOCHROME;
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FT_Error err;
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err = FT_Load_Glyph (face, glyph_idx, flag);
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if (err)
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{
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printf ("Freetype Error %d loading glyph 0x%x for U+0x%x",
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err, glyph_idx, char_code);
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if (err > 0 && err < (signed) ARRAY_SIZE (ft_errmsgs))
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printf (": %s\n", ft_errmsgs[err]);
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else
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printf ("\n");
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return;
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}
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glyph = face->glyph;
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if (glyph->next)
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printf ("%x\n", char_code);
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cuttop = cutbottom = cutleft = cutright = 0;
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width = glyph->bitmap.width;
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height = glyph->bitmap.rows;
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bitmap_size = ((width * height + 7) / 8);
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glyph_info->bitmap = malloc (bitmap_size);
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if (!glyph_info->bitmap)
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{
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fprintf (stderr, "grub-gen-asciih: error: out of memory");
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exit (1);
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}
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glyph_info->bitmap_size = bitmap_size;
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glyph_info->width = width;
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glyph_info->height = height;
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glyph_info->x_ofs = glyph->bitmap_left;
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glyph_info->y_ofs = glyph->bitmap_top - height;
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glyph_info->device_width = glyph->metrics.horiAdvance / 64;
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mask = 0;
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data = &glyph_info->bitmap[0] - 1;
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for (j = cuttop; j < height + cuttop; j++)
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for (i = cutleft; i < width + cutleft; i++)
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add_pixel (&data, &mask,
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glyph->bitmap.buffer[i / 8 + j * glyph->bitmap.pitch] &
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(1 << (7 - (i & 7))));
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}
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static void
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write_font_ascii_bitmap (FILE *file, FT_Face face)
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{
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struct grub_glyph_info glyph;
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int char_code;
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fprintf (file, "/* THIS CHUNK OF BYTES IS AUTOMATICALLY GENERATED */\n");
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fprintf (file, "unsigned char ascii_bitmaps[] =\n");
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fprintf (file, "{\n");
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for (char_code = 0; char_code <= 0x7f; char_code++)
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{
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FT_UInt glyph_idx;
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glyph_idx = FT_Get_Char_Index (face, char_code);
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if (!glyph_idx)
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return;
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add_glyph (glyph_idx, face, char_code, &glyph);
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if (glyph.width == 8 && glyph.height == 16
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&& glyph.x_ofs == 0 && glyph.y_ofs == 0)
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{
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int row;
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for (row = 0; row < 16; row++)
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fprintf (file, "0x%02x, ", glyph.bitmap[row]);
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}
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else
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{
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unsigned char glph[16];
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int p = 0, mask = 0x80;
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int row, col;
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int dy = 12 - glyph.height - glyph.y_ofs;
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for (row = 0; row < 16; row++)
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glph[row] = 0;
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for (row = 0; row < glyph.height; row++)
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for (col = 0; col < glyph.width; col++)
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{
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int val = glyph.bitmap[p] & mask;
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mask >>= 1;
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if (mask == 0)
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{
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mask = 0x80;
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p++;
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}
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if (val && dy + row >= 0
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&& dy + row < 16
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&& glyph.x_ofs + col >= 0
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&& glyph.x_ofs + col < 8)
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glph[dy + row] |= 1 << (7 - (glyph.x_ofs + col));
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}
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for (row = 0; row < 16; row++)
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fprintf (file, "0x%02x, ", glph[row]);
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}
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fprintf (file, "\n");
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free (glyph.bitmap);
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}
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fprintf (file, "};\n");
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}
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int
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main (int argc, char *argv[])
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{
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FT_Library ft_lib;
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FT_Face ft_face;
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FILE *file;
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if (argc != 3)
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{
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fprintf (stderr, "grub-gen-asciih: usage: INPUT OUTPUT");
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return 1;
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}
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if (FT_Init_FreeType (&ft_lib))
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{
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fprintf (stderr, "grub-gen-asciih: error: FT_Init_FreeType fails");
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return 1;
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}
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{
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int size;
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FT_Error err;
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err = FT_New_Face (ft_lib, argv[1], 0, &ft_face);
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if (err)
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{
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fprintf (stderr, "can't open file %s, index %d: error %d",
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argv[1], 0, err);
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if (err > 0 && err < (signed) ARRAY_SIZE (ft_errmsgs))
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fprintf (stderr, ": %s\n", ft_errmsgs[err]);
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else
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fprintf (stderr, "\n");
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return 1;
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}
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if ((ft_face->face_flags & FT_FACE_FLAG_SCALABLE) ||
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(! ft_face->num_fixed_sizes))
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size = GRUB_FONT_DEFAULT_SIZE;
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else
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size = ft_face->available_sizes[0].height;
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if (FT_Set_Pixel_Sizes (ft_face, size, size))
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{
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fprintf (stderr, "grub-gen-asciih: error: can't set %dx%d font size", size, size);
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return 1;
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}
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}
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file = fopen (argv[2], "w");
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if (! file)
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{
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fprintf (stderr, "grub-gen-asciih: error: cannot write to `%s': %s", argv[2],
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strerror (errno));
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return 1;
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}
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write_font_ascii_bitmap (file, ft_face);
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fclose (file);
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FT_Done_Face (ft_face);
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FT_Done_FreeType (ft_lib);
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return 0;
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}
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