148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
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#include <toml.h>
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#include "util.h"
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#include "font.h"
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int font_compare(const node_t *a, const node_t *b) {
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const font_t *x = (const font_t *)a->data;
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const font_t *y = (const font_t *)b->data;
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return strcmp(x->name, y->name);
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}
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node_t *load_fonts(toml_table_t *table, const char *base_path) {
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node_t *root = NULL;
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// vast majority of projects should have only 1-2 fonts, but let's offer
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// some room in case there's more.
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for (int i = 0; i < 32; i++) {
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const char *key = toml_key_in(table, i);
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if (!key) break;
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char fullname[200];
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font_t font;
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toml_datum_t filename = toml_string_in(table, key);
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if (!filename.ok) {
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error("couldn't load font ", key);
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}
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snprintf(fullname, 200, "%s/%s", base_path, filename.u.s);
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font = font_create(key, fullname);
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root = node_insert(root, &font, font_compare);
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}
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return root;
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}
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font_t *font_find(node_t *root, const char *key) {
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font_t search = {.name = key};
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node_t *node = node_search(root, &search, font_compare);
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font_t *font = (font_t *)node->data;
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if (font == NULL) {
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error("couldn't find requested font ", key);
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}
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return font;
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}
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font_t font_create(const char *font_name, const char *filename) {
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FILE *fp;
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font_t font;
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char errbuf[200];
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map_t *map;
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printf(" Processing %s...\n", font_name);
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fp = fopen(filename, "r");
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if (!fp) {
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char str[200];
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snprintf(str, 200, "can't open %s: ", filename);
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error(str, strerror(errno));
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}
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toml_table_t *table = toml_parse_file(fp, errbuf, 200);
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fclose(fp);
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#define TOML_GET_KEY(var, key, func) toml_datum_t (var) = func(table, (key));\
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if (!(var).ok) {\
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char str[200];\
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snprintf(str, 200, "key '%s' missing from", (key)); \
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error(str, filename); \
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}
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TOML_GET_KEY(name, "name", toml_string_in)
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TOML_GET_KEY(image_filename, "filename", toml_string_in)
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TOML_GET_KEY(bpp, "bits_per_pixel", toml_int_in)
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TOML_GET_KEY(width, "width", toml_int_in)
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TOML_GET_KEY(height, "height", toml_int_in)
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#undef TOML_GET_KEY
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toml_table_t *mapping = toml_table_in(table, "map");
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font.name = name.u.s;
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font.image_filename = image_filename.u.s;
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font.bits_per_pixel = bpp.u.i;
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font.width = width.u.i;
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font.height = height.u.i;
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font.map_entries = map_create(mapping, &map);
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font.map = map;
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return font;
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}
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void font_destroy(font_t font) {
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map_destroy(font.map);
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free(font.name);
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free(font.image_filename);
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}
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unsigned int map_create(toml_table_t *table, map_t **map) {
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map_t *node;
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map_t *next;
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unsigned int nodes;
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map_t *root = malloc(sizeof(map_t*));
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toml_array_t *space = toml_array_in(table, " ");
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toml_datum_t spcidx = toml_int_at(space, 0);
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toml_datum_t spcwid = toml_int_at(space, 1);
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if (!spcidx.ok) {
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error("missing or inappropriate index for glyph: ' '", "");
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}
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if (!spcwid.ok) {
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error("missing or inappropriate index for glyph: ' '", "");
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}
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node = root;
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for (nodes = 1; ; nodes++) {
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const char *key = toml_key_in(table, nodes);
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if (!key) break;
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toml_array_t *val = toml_array_in(table, key);
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toml_datum_t index = toml_int_at(val, 0);
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toml_datum_t width = toml_int_at(val, 1);
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if (!index.ok) {
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error("missing or inappropriate index for glyph: ", key);
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}
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if (!width.ok) {
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error("missing or inappropriate width for glyph: ", key);
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}
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next = malloc(sizeof(map_t *));
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next->glyph = key;
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next->index = index.u.i;
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next->width = width.u.i;
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node->next = next;
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node = next;
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}
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node->next = NULL;
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*map = root;
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return nodes;
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}
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void map_destroy(map_t *map) {
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map_t *node = map;
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map_t *next;
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while ((next = node->next) != NULL) {
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free(node);
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node = next;
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}
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}
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