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Start TTF conversion for DHGR

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This commit is contained in:
David Schmenk 2024-11-30 16:31:57 -08:00
parent 3c38943141
commit 8d289856fd
1 changed files with 104 additions and 0 deletions
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104
src/dhgr.tk/utils/ttfconv.c Normal file
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/*
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <freetype2/ft2build.h>
#include <freetype/freetype.h>
//#include FT_FREETYPE2_H
#define FONT_WIDTH 12
#define FONT_HEIGHT 20
/*
* Glyph render routines.
*/
unsigned char *glyph_buf;
int glyph_width, glyph_height, glyph_base, glyph_pitch;
void pixblt(unsigned char *srcbuf, int srcpitch, unsigned char *dstbuf, int dstpitch, int width, int height)
{
int i, j;
for (j = 0; j < height; j++)
{
for (i = 0; i < width; i++)
dstbuf[i] = srcbuf[i];
srcbuf += srcpitch;
dstbuf += dstpitch;
}
}
void strblt(char *string, unsigned char *dstbuf, int dstpitch, int x, int y)
{
int c, l = strlen(string);
dstbuf += x + y * dstpitch;
for (c = 0; c < l; c++)
{
pixblt(glyph_buf + (string[c] - 32) * glyph_width,
glyph_pitch,
dstbuf,
dstpitch,
glyph_width,
glyph_height);
dstbuf += glyph_width;
}
}
void create_font_glyphs(FT_Face face)
{
int c, glyph_top;
FT_Set_Pixel_Sizes(face, glyph_width * 1.5, glyph_height);
glyph_pitch = glyph_width * (128-32);
glyph_buf = malloc(glyph_pitch * glyph_height);
memset(glyph_buf, 0, glyph_pitch * glyph_height);
for (c = 32; c < 128; c++)
{
FT_Load_Char(face, c, FT_LOAD_RENDER);
glyph_top = glyph_base - face->glyph->bitmap_top;
if (glyph_top > 0 && glyph_top < glyph_height)
pixblt(face->glyph->bitmap.buffer,
face->glyph->bitmap.pitch,
glyph_buf + (c - 32) * glyph_width + face->glyph->bitmap_left + glyph_top * glyph_pitch,
glyph_pitch,
face->glyph->bitmap.width,
face->glyph->bitmap.rows);
}
}
void die(char *str)
{
fprintf(stderr,"error: %s\n", str);
exit(-1);
}
int main(int argc, char **argv)
{
char *fontfile;
FT_Library ft;
FT_Face face;
if (argc > 1)
fontfile = argv[1];
else
die( "Missing font file");
/*
* Init FreeType library.
*/
if (FT_Init_FreeType(&ft))
die("FreeType error");
if (FT_New_Face(ft, fontfile, 0, &face))
die("Missing font");
if (face->num_fixed_sizes)
{
glyph_width = face->available_sizes[0].width;
glyph_height = face->available_sizes[0].height;
}
else
{
glyph_width = FONT_WIDTH;
glyph_height = FONT_HEIGHT;
}
glyph_base = glyph_height * 3 / 4;
create_font_glyphs(face);
return 0;
}