graphics!

1 files changed, 66 insertions, 0 deletions

diff --git a/src/user/libfont/fonts.c b/src/user/libfont/fonts.c
new file mode 100644
index 0000000..1692992
--- /dev/null
+++ b/src/user/libfont/fonts.c
@@ -0,0 +1,66 @@
+#include <libfont/fonts.h>
+#include <knob/format.h>
+#include <knob/block.h>
+#include <knob/heap.h>
+#include <knob/file.h>
+
+#include "filist.h"
+#include "bdf.h"
+
+#define FONT_PATH "fonts/"
+#define FONT_PATH_L 6
+
+struct font_loader_t {
+  const char *ext;
+  bool (*func)(const char *, struct font_info *);
+} font_loaders[] = {
+  { .ext = ".bdf",
+    .func = try_load_bdf
+  },
+  { .ext = ""
+  }
+};
+
+struct font_info *get_font(const char *name) {
+  struct font_info *font = find_entry(name);
+  if (font)
+    return font;
+  font = new_entry(name);
+  if (!font)
+    return 0;//out of memory?
+
+  const uint32_t name_len = strlen(name);
+  for (struct font_loader_t *i = font_loaders; i->ext[0]; ++i) {
+    char *buf = get_block(FONT_PATH_L + name_len + strlen(i->ext) + 1);
+    blockcpy(buf, FONT_PATH, FONT_PATH_L);
+    blockcpy(buf + FONT_PATH_L, name, name_len);
+    strcpy(buf + FONT_PATH_L + name_len, i->ext);
+    struct file *f = open_file(buf);
+    if (!f) {
+      free_block(buf);
+      continue;
+    }
+    syslogf("[libfont] Loading %s%s...", name, i->ext);
+    if (i->func(buf, font)) {
+      close_file(f);
+      free_block(buf);
+      syslogf("[libfont] Loaded %s%s.", name, i->ext);
+      return font;
+    }
+    close_file(f);
+    free_block(buf);
+    syslogf("[libfont] Failed to load %s%s.", name, i->ext);
+  }
+  del_last();
+  return 0;
+}
+
+void put_char(const struct font_info *font, char ch, uint8_t *pb_ptr, uint32_t pb_pitch, uint8_t bg, uint8_t fg) {
+//char *const msg = format("put_char(font = 0x%x, ch = '%c', pb_ptr = 0x%x, pb_pitch = %u, bg = 0x%2x, fg = 0x%2x);", font, ch, pb_ptr, pb_pitch, bg, fg);
+//_system_log(msg);
+//free_block(msg);
+  const bool *const bitmap = font->bitmaps[(uint8_t)ch] ? font->bitmaps[(uint8_t)ch] : font->bitmaps[0];
+  for (uint32_t y = 0; y < font->char_height; ++y)
+    for (uint32_t x = 0; x < font->char_width; ++x)
+      pb_ptr[y * pb_pitch + x] = bitmap[y * font->char_width + x] ? fg : bg;
+}
\ No newline at end of file