More splits from "tuxpaint.c":

+ "debug.h": Defines whether debugging printf() calls should be enabled.
  + "dirwalk.c/h": Callback functions for recursive directory traversal.
  + "fonts.c/h": Font loading/grouping/discarding variables and functions.
  + "get_fname.c/h": Functions for constructing preferred file paths.

src/fonts.h

@@ -0,0 +1,120 @@
+/*
+  fonts.h
+*/
+
+#ifndef FONTS_H
+#define FONTS_H
+
+// plan to rip this out as soon as it is considered stable
+//#define THREADED_FONTS
+#define FORKED_FONTS
+#ifdef WIN32
+#undef FORKED_FONTS
+#endif
+
+
+
+#include "SDL.h"
+#include "SDL_ttf.h"
+
+#include "compiler.h"
+
+#ifndef FORKED_FONTS
+#include "SDL_thread.h"
+#include "SDL_mutex.h"
+
+extern SDL_Thread *font_thread;
+#endif
+
+extern volatile long font_thread_done, font_thread_aborted;
+extern volatile long waiting_for_fonts;
+extern int font_scanner_pid;
+extern int font_socket_fd;
+
+extern int no_system_fonts;
+extern int was_bad_font;
+
+
+TTF_Font *BUGFIX_TTF_OpenFont206(const char * const file, int ptsize);
+#define TTF_OpenFont    BUGFIX_TTF_OpenFont206
+
+TTF_Font *try_alternate_font(int size);
+TTF_Font *load_locale_font(TTF_Font *fallback, int size);
+int load_user_fonts(SDL_Surface * screen, void *vp);
+
+#ifdef FORKED_FONTS
+void reliable_write(int fd, const void *buf, size_t count);
+void reliable_read(int fd, void *buf, size_t count);
+void run_font_scanner(SDL_Surface * screen);
+void receive_some_font_info(SDL_Surface * screen);
+#endif
+
+//////////////////////////////////////////////////////////////////////
+// font stuff
+
+// example from a Debian box with MS fonts:
+// start with 232 files
+// remove "Cursor", "Webdings", "Dingbats", "Standard Symbols L"
+// split "Condensed" faces out into own family
+// group by family
+// end up with 34 user choices
+
+extern int text_state;
+// nice progression (alternating 33% and 25%) 9 12 18 24 36 48 72 96 144 192
+// commonly hinted sizes seem to be: 9, 10, 12, 14, 18, 20 (less so), 24
+// reasonable: 9,12,18... and 10,14,18...
+static int text_sizes[] = {9, 12, 18, 24, 36, 48,
+                           56, 64, 96, 112, 128, 160};  // point sizes
+#define MIN_TEXT_SIZE 0u
+#define MAX_TEXT_SIZE (sizeof text_sizes / sizeof text_sizes[0] - 1)
+static unsigned text_size = 4;   // initial text size
+
+// for sorting through the font files at startup
+typedef struct style_info {
+  char *filename;
+  char *directory;
+  char *family;    // name like "FooCorp Thunderstruck"
+  char *style;     // junk like "Oblique Demi-Bold"
+  int italic;
+  int boldness;
+  int score;
+  int truetype; // Is it? (TrueType gets priority)
+} style_info;
+
+// user's notion of a font
+typedef struct family_info {
+  char *directory;
+  char *family;
+  char *filename[4];
+  TTF_Font *handle;
+  int score;
+} family_info;
+
+extern TTF_Font * medium_font, * small_font, * large_font, * locale_font;
+
+extern family_info **user_font_families;
+extern int num_font_families;
+extern int num_font_families_max;
+
+extern style_info **user_font_styles;
+extern int num_font_styles;
+extern int num_font_styles_max;
+
+
+int compar_fontgroup(const void *v1, const void *v2);
+int compar_fontkiller(const void *v1, const void *v2);
+int compar_fontscore(const void *v1, const void *v2);
+void parse_font_style(style_info *si);
+void groupfonts_range(style_info **base, int count);
+void dupe_markdown_range(family_info **base, int count);
+void groupfonts(void);
+TTF_Font *getfonthandle(int desire);
+void loadfonts(SDL_Surface * screen, const char * const dir);
+
+int do_surfcmp(const SDL_Surface *const *const v1, const SDL_Surface *const *const v2);
+int surfcmp(const void *s1, const void *s2);
+int charset_works(TTF_Font *font, const char *s);
+
+#endif
+
+