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107 lines
2.7 KiB
107 lines
2.7 KiB
#define _POSIX_C_SOURCE 200809l
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#define STB_TRUETYPE_IMPLEMENTATION
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#define STBTT_STATIC
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#include <sys/mman.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <errno.h>
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#include <err.h>
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#include "stb_truetype.h"
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#include "ff.h"
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const int font_size = 32;
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void map_file(const unsigned char **str, int *size, const char *path)
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{
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if (!path)
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err(EXIT_FAILURE, "NULL filename");
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FILE *fp = fopen(path, "r");
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if (!fp)
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err(EXIT_FAILURE, "Cannot open file %s", path);
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*size = lseek(fileno(fp), 0, SEEK_END);
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if (*size == (off_t)-1)
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err(EXIT_FAILURE, "lseek failed");
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*str = mmap(0, *size, PROT_READ, MAP_PRIVATE, fileno(fp), 0);
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if (*str == (void*)-1)
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err(EXIT_FAILURE, "mmap failed");
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if (fclose(fp))
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err(EXIT_FAILURE, "Error closing file");
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}
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int main(int argc, char *argv[])
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{
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if (argc < 2)
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return EXIT_FAILURE;
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int len;
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const unsigned char *map;
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map_file(&map, &len, argv[1]);
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stbtt_fontinfo font;
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stbtt_InitFont(&font, map, stbtt_GetFontOffsetForIndex(map, 0));
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// all this is to get the font bounding box in pixels
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float font_scale = 1.0;
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font_scale = stbtt_ScaleForPixelHeight(&font, font_size);
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int ascent, descent, linegap;
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stbtt_GetFontVMetrics(&font, &ascent, &descent, &linegap);
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int x0,y0,x1,y1;
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int bound_w, bound_h;
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stbtt_GetFontBoundingBox(&font, &x0, &y0, &x1, &y1);
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printf("font_scale: %f\n", font_scale);
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printf("x0:%d y0:%d x1:%d y1:%d\n",x0,y0,x1,y1);
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int baseline = font_scale * -y0;
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bound_h = (baseline+font_scale*y1) - (baseline+font_scale*y0);
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bound_w = (font_scale*x1) - (font_scale*x0);
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baseline = bound_h - baseline;
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unsigned char *bitmap = malloc(bound_h*bound_w);
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if (!bitmap)
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err(EXIT_FAILURE, "Cannot allocate bitmap");
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printf("bounding h:%d w:%d\n", bound_h, bound_w);
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printf("baseline: %d\n", baseline);
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struct ff *image = ff_new(0, 0);
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// get all ascii
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int x = 0, y = 0, maxwidth = 64*bound_w;
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for (unsigned int i = 0; i <= 0x7F; i++) {
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int x0,y0,x1,y1,w,h,l,a, ox,oy;
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int g = stbtt_FindGlyphIndex(&font, i);
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stbtt_GetGlyphBitmapBoxSubpixel(&font, g, font_scale, font_scale, 0, 0, &x0, &y0, &x1, &y1);
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w = x1 - x0;
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h = y1 - y0;
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//printf("%d\n", y0);
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stbtt_GetGlyphHMetrics(&font, g, &a, &l);
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stbtt_MakeGlyphBitmapSubpixel(&font, bitmap, w, h, w, font_scale, font_scale, 0, 0, g);
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//printf("'%c' -> l*scale:%.0f, y0:%d\n", i, font_scale*l, bound_h+y0);
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ox = font_scale*l;
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oy = bound_h+y0;
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ff_overlay_8r(&image, bitmap, x+ox, y+oy, w, h);
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x += bound_w;
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if (x >= maxwidth) y += bound_h;
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x %= maxwidth;
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}
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FILE *fp = fopen("out.ff", "w");
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if (fp) {
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fwrite(image, 1, ff_bytes(image), fp);
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fclose(fp);
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}
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free(bitmap);
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ff_free(image);
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munmap((void *)map, len);
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return 0;
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}
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