Make install data relocatable

1 files changed, 166 insertions, 95 deletions

diff --git a/src/tuxpaint.c b/src/tuxpaint.c
index 74d991a..8ddcea3 100644
--- a/src/tuxpaint.c
+++ b/src/tuxpaint.c
@@ -57,7 +57,6 @@
 /*#define PRINTMETHOD_PNG_PNM_PS*/   /* Output PNG, assuming it gets printed */
 
 
-#define MAX_PATH 256
 
 
 /* Compile-time options: */
@@ -103,6 +102,10 @@
 #define TPAINT_AMASK 0x000000ff
 #endif
 
+char *DATA_PREFIX;
+char *MAGIC_PREFIX;
+char *LOCALEDIR;
+
 static unsigned draw_colors(unsigned action);
 
 /* hide all scale-related values here */
@@ -465,6 +468,7 @@ extern WrapperData macosx;
 #include "compiler.h"
 
 #include "sugar.h"
+#include "tuxpaint.h"
 
 
 #if VIDEO_BPP==32
@@ -1580,7 +1584,7 @@ static SDL_Cursor *get_cursor(unsigned char *bits, unsigned char *mask_bits,
 			      unsigned int x, unsigned int y);
 static void seticon(void);
 static SDL_Surface *loadimage(const char *const fname);
-static SDL_Surface *do_loadimage(const char *const fname, int abort_on_error);
+static SDL_Surface *do_loadimage(const char *fname, int abort_on_error);
 static void draw_toolbar(void);
 static void draw_magic(void);
 static void draw_brushes(void);
@@ -5618,9 +5622,7 @@ static void show_version(int details)
 
   printf("  Data directory (DATA_PREFIX) = %s\n", DATA_PREFIX);
   printf("  Plugin directory (MAGIC_PREFIX) = %s\n", MAGIC_PREFIX);
-  printf("  Doc directory (DOC_PREFIX) = %s\n", DOC_PREFIX);
   printf("  Locale directory (LOCALEDIR) = %s\n", LOCALEDIR);
-  printf("  Input Method directory (IMDIR) = %s\n", IMDIR);
   printf("  System config directory (CONFDIR) = %s\n", CONFDIR);
 
 
@@ -5845,9 +5847,20 @@ static void loadbrush_callback(SDL_Surface * screen,
 static void load_brush_dir(SDL_Surface * screen, const char *restrict const dir)
 {
   char buf[TP_FTW_PATHSIZE];
-  unsigned dirlen = strlen(dir);
+  unsigned dirlen;
+
+  if (dir[0] != '/')
+  {
+    snprintf(buf, sizeof(buf), "%s/%s", DATA_PREFIX, dir);
+    dirlen = strlen(buf);
+  }
+  else
+  {
+    dirlen = strlen(dir);
+    memcpy(buf, dir, dirlen);
+    buf[dirlen] = '\0';
+  }
 
-  memcpy(buf, dir, dirlen);
   tp_ftw(screen, buf, dirlen, 0, loadbrush_callback, NULL);
 }
 
@@ -6716,8 +6729,20 @@ static void loadstamp_callback(SDL_Surface * screen,
 static void load_stamp_dir(SDL_Surface * screen, const char *const dir)
 {
   char buf[TP_FTW_PATHSIZE];
-  unsigned dirlen = strlen(dir);
-  memcpy(buf, dir, dirlen);
+  unsigned dirlen;
+
+  if (dir[0] != '/')
+  {
+    snprintf(buf, sizeof(buf), "%s/%s", DATA_PREFIX, dir);
+    dirlen = strlen(buf);
+  }
+  else
+  {
+    dirlen = strlen(dir);
+    memcpy(buf, dir, dirlen);
+    buf[dirlen] = '\0';
+  }
+
   load_stamp_basedir = dir;
   tp_ftw(screen, buf, dirlen, 0, loadstamp_callback, NULL);
 }
@@ -6730,7 +6755,7 @@ static void load_stamps(SDL_Surface * screen)
   default_stamp_size = compute_default_scale_factor(1.0);
 
   load_stamp_dir(screen, homedirdir);
-  load_stamp_dir(screen, DATA_PREFIX "stamps");
+  load_stamp_dir(screen, "stamps");
 #ifdef __APPLE__
   load_stamp_dir(screen, "/Library/Application Support/TuxPaint/stamps");
 #endif
@@ -6743,8 +6768,8 @@ static void load_stamps(SDL_Surface * screen)
   if (num_stamps[0] == 0)
   {
     fprintf(stderr,
-	    "\nWarning: No stamps found in " DATA_PREFIX "stamps/\n"
-	    "or %s\n\n", homedirdir);
+	    "\nWarning: No stamps found in %s/stamps/\n"
+	    "or %s\n\n", DATA_PREFIX, homedirdir);
   }
 
   num_stamp_groups = stamp_group + 1;
@@ -6894,21 +6919,23 @@ static void seticon(void)
   Uint8 *mask;
 #endif
   SDL_Surface *icon;
+  char fname_buf[MAX_PATH];
 
   /* Load icon into a surface: */
 
 #ifndef WIN32
-  icon = IMG_Load(DATA_PREFIX "images/icon.png");
+  snprintf(fname_buf, sizeof(fname_buf), "%s/images/icon.png", DATA_PREFIX);
 #else
-  icon = IMG_Load(DATA_PREFIX "images/icon32x32.png");
+  snprintf(fname_buf, sizeof(fname_buf), "%s/images/icon32x32.png", DATA_PREFIX);
 #endif
+  icon = IMG_Load(fname_buf);
 
   if (icon == NULL)
   {
     fprintf(stderr,
 	    "\nWarning: I could not load the icon image: %s\n"
 	    "The Simple DirectMedia error that occurred was:\n"
-	    "%s\n\n", DATA_PREFIX "images/icon.png", SDL_GetError());
+	    "%s/images/icon.png", SDL_GetError(), DATA_PREFIX);
     return;
   }
 
@@ -6996,10 +7023,16 @@ static SDL_Surface *loadimage(const char *const fname)
 
 /* Load an image: */
 
-static SDL_Surface *do_loadimage(const char *const fname, int abort_on_error)
+static SDL_Surface *do_loadimage(const char *fname, int abort_on_error)
 {
   SDL_Surface *s, *disp_fmt_s;
+  char fname_buf[MAX_PATH];
 
+  if (fname[0] != '/')
+  {
+    snprintf(fname_buf, sizeof(fname_buf), "%s/%s", DATA_PREFIX, fname);
+    fname = fname_buf;
+  }
 
   /* Load the image file: */
 
@@ -9787,12 +9820,18 @@ static void playstampdesc(int chan)
 
 #ifndef NOSOUND
 
-static Mix_Chunk *loadsound_extra(const char *const fname, const char *extra)
+static Mix_Chunk *loadsound_extra(const char *fname, const char *extra)
 {
   char *snd_fname;
   char tmp_str[MAX_PATH], ext[5];
   Mix_Chunk *tmp_snd;
+  char fname_buf[MAX_PATH];
 
+  if (fname[0] != '/')
+  {
+    snprintf(fname_buf, "%s/%s", DATA_PREFIX, fname);
+    fname = fname_buf;
+  }
 
   if (strcasestr(fname, ".png") != NULL)
   {
@@ -10352,13 +10391,16 @@ static void load_starter_id(char *saved_id, FILE *fil)
 static void load_starter(char *img_id)
 {
   char *dirname;
-  char fname[256];
+  char fname[MAX_PATH];
   SDL_Surface *tmp_surf;
 
   /* Determine path to starter files: */
 
   if (starter_personal == 0)
-    dirname = strdup(DATA_PREFIX "starters");
+  {
+    snprintf(fname, sizeof(fname), "%s/templates", DATA_PREFIX);
+    dirname = strdup(fname);
+  }
   else
     dirname = get_fname("starters", DIR_DATA);
 
@@ -10527,13 +10569,16 @@ static void load_starter(char *img_id)
 static void load_template(char *img_id)
 {
   char *dirname;
-  char fname[256];
+  char fname[MAX_PATH];
   SDL_Surface *tmp_surf;
 
   /* Determine path to starter files: */
 
   if (template_personal == 0)
-    dirname = strdup(DATA_PREFIX "templates");
+  {
+    snprintf(fname, sizeof(fname), "%s/templates", DATA_PREFIX);
+    dirname = strdup(fname);
+  }
   else
     dirname = get_fname("templates", DIR_DATA);
 
@@ -11393,8 +11438,11 @@ static void cleanup(void)
 #ifdef LOW_QUALITY_COLOR_SELECTOR
   free_surface(&img_paintcan);
 #else
-  free_surface_array(img_color_btns, NUM_COLORS * 2);
-  free(img_color_btns);
+  if (img_color_btns)
+  {
+    free_surface_array(img_color_btns, NUM_COLORS * 2);
+    free(img_color_btns);
+  }
 #endif
 
   free_surface(&screen);
@@ -17124,8 +17172,8 @@ static int do_new_dialog(void)
     {
       /* Finally, check for system-wide coloring-book style
          'starter' images: */
-
-      dirname[places_to_look] = strdup(DATA_PREFIX "starters");
+      snprintf(fname, sizeof(fname), "%s/starters", DATA_PREFIX);
+      dirname[places_to_look] = strdup(fname);
     }
     else if (places_to_look == PLACE_PERSONAL_TEMPLATES_DIR)
     {
@@ -17136,8 +17184,8 @@ static int do_new_dialog(void)
     else if (places_to_look == PLACE_TEMPLATES_DIR)
     {
       /* Finally, check for system-wide 'template' images: */
-
-      dirname[places_to_look] = strdup(DATA_PREFIX "templates");
+      snprintf(fname, sizeof(fname), "%s/templates", DATA_PREFIX);
+      dirname[places_to_look] = strdup(fname);
     }
 
 
@@ -20273,6 +20321,8 @@ static void setup_config(char *argv[])
 
   if(tmpcfg_cmd.savedir)
     savedir = strdup(tmpcfg_cmd.savedir);
+  else if (sugar_detected())
+    savedir = sugar_get_savedir();
   else
   {
 #ifdef _WIN32
@@ -20836,7 +20886,17 @@ static void setup(void)
   i = NUM_SOUNDS;
   while (use_sound && i--)
   {
-    sounds[i] = Mix_LoadWAV(sound_fnames[i]);
+    if (sound_fnames[i][0] != '/')
+    {
+      char fname_buf[MAX_PATH];
+      snprintf(fname_buf, sizeof(fname_buf), "%s/%s", DATA_PREFIX,
+              sound_fnames[i]);
+      sounds[i] = Mix_LoadWAV(fname_buf);
+    }
+    else
+    {
+      sounds[i] = Mix_LoadWAV(sound_fnames[i]);
+    }
 
     if (sounds[i] == NULL)
     {
@@ -20980,9 +21040,9 @@ static void setup(void)
 
   /* quickly: title image, version, progress bar, and watch cursor */
 
-  img_title = loadimage(DATA_PREFIX "images/title.png");
-  img_title_credits = loadimage(DATA_PREFIX "images/title-credits.png");
-  img_progress = loadimage(DATA_PREFIX "images/ui/progress.png");
+  img_title = loadimage("images/title.png");
+  img_title_credits = loadimage("images/title-credits.png");
+  img_progress = loadimage("images/ui/progress.png");
 
   if (screen->w - img_title->w >= 410 && screen->h - img_progress->h - img_title_credits->h - 40) /* FIXME: Font */
     big_title = 1;
@@ -20991,9 +21051,9 @@ static void setup(void)
 
 
   if (big_title)
-    img_title_tuxpaint = loadimage(DATA_PREFIX "images/title-tuxpaint-2x.png");
+    img_title_tuxpaint = loadimage("images/title-tuxpaint-2x.png");
   else
-    img_title_tuxpaint = loadimage(DATA_PREFIX "images/title-tuxpaint.png");
+    img_title_tuxpaint = loadimage("images/title-tuxpaint.png");
 
   SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 255, 255, 255));
 
@@ -21091,16 +21151,16 @@ static void setup(void)
 #endif
 
   medium_font = TuxPaint_Font_OpenFont(PANGO_DEFAULT_FONT,
-					DATA_PREFIX "fonts/default_font.ttf",
+					"fonts/default_font.ttf",
 			    		18 - (only_uppercase * 3));
 
   if (medium_font == NULL)
   {
     fprintf(stderr,
 	    "\nError: Can't load font file: "
-	    DATA_PREFIX "fonts/default_font.ttf\n"
+	    "%s/fonts/default_font.ttf\n"
 	    "The Simple DirectMedia Layer error that occurred was:\n"
-	    "%s\n\n", SDL_GetError());
+	    "%s\n\n", DATA_PREFIX, SDL_GetError());
 
     cleanup();
     exit(1);
@@ -21271,20 +21331,20 @@ static void setup(void)
   for (i = 0; i < NUM_TOOLS; i++)
     img_tools[i] = loadimage(tool_img_fnames[i]);
 
-  img_title_on = loadimage(DATA_PREFIX "images/ui/title.png");
-  img_title_large_on = loadimage(DATA_PREFIX "images/ui/title_large.png");
-  img_title_off = loadimage(DATA_PREFIX "images/ui/no_title.png");
-  img_title_large_off = loadimage(DATA_PREFIX "images/ui/no_title_large.png");
+  img_title_on = loadimage("images/ui/title.png");
+  img_title_large_on = loadimage("images/ui/title_large.png");
+  img_title_off = loadimage("images/ui/no_title.png");
+  img_title_large_off = loadimage("images/ui/no_title_large.png");
 
-  img_btn_up = loadimage(DATA_PREFIX "images/ui/btn_up.png");
-  img_btn_down = loadimage(DATA_PREFIX "images/ui/btn_down.png");
-  img_btn_off = loadimage(DATA_PREFIX "images/ui/btn_off.png");
+  img_btn_up = loadimage("images/ui/btn_up.png");
+  img_btn_down = loadimage("images/ui/btn_down.png");
+  img_btn_off = loadimage("images/ui/btn_off.png");
 
-  img_btnsm_up = loadimage(DATA_PREFIX "images/ui/btnsm_up.png");
-  img_btnsm_off = loadimage(DATA_PREFIX "images/ui/btnsm_off.png");
+  img_btnsm_up = loadimage("images/ui/btnsm_up.png");
+  img_btnsm_off = loadimage("images/ui/btnsm_off.png");
 
-  img_sfx = loadimage(DATA_PREFIX "images/tools/sfx.png");
-  img_speak = loadimage(DATA_PREFIX "images/tools/speak.png");
+  img_sfx = loadimage("images/tools/sfx.png");
+  img_speak = loadimage("images/tools/speak.png");
 
   img_black = SDL_CreateRGBSurface(SDL_SRCALPHA | SDL_SWSURFACE,
 				   img_btn_off->w, img_btn_off->h,
@@ -21307,54 +21367,54 @@ static void setup(void)
 
   show_progress_bar(screen);
 
-  img_yes = loadimage(DATA_PREFIX "images/ui/yes.png");
-  img_no = loadimage(DATA_PREFIX "images/ui/no.png");
+  img_yes = loadimage("images/ui/yes.png");
+  img_no = loadimage("images/ui/no.png");
 
-  img_prev = loadimage(DATA_PREFIX "images/ui/prev.png");
-  img_next = loadimage(DATA_PREFIX "images/ui/next.png");
+  img_prev = loadimage("images/ui/prev.png");
+  img_next = loadimage("images/ui/next.png");
 
-  img_mirror = loadimage(DATA_PREFIX "images/ui/mirror.png");
-  img_flip = loadimage(DATA_PREFIX "images/ui/flip.png");
+  img_mirror = loadimage("images/ui/mirror.png");
+  img_flip = loadimage("images/ui/flip.png");
 
-  img_open = loadimage(DATA_PREFIX "images/ui/open.png");
-  img_erase = loadimage(DATA_PREFIX "images/ui/erase.png");
-  img_back = loadimage(DATA_PREFIX "images/ui/back.png");
-  img_trash = loadimage(DATA_PREFIX "images/ui/trash.png");
+  img_open = loadimage("images/ui/open.png");
+  img_erase = loadimage("images/ui/erase.png");
+  img_back = loadimage("images/ui/back.png");
+  img_trash = loadimage("images/ui/trash.png");
 
-  img_slideshow = loadimage(DATA_PREFIX "images/ui/slideshow.png");
-  img_play = loadimage(DATA_PREFIX "images/ui/play.png");
-  img_select_digits = loadimage(DATA_PREFIX "images/ui/select_digits.png");
+  img_slideshow = loadimage("images/ui/slideshow.png");
+  img_play = loadimage("images/ui/play.png");
+  img_select_digits = loadimage("images/ui/select_digits.png");
 
-  img_popup_arrow = loadimage(DATA_PREFIX "images/ui/popup_arrow.png");
+  img_popup_arrow = loadimage("images/ui/popup_arrow.png");
 
-  img_dead40x40 = loadimage(DATA_PREFIX "images/ui/dead40x40.png");
+  img_dead40x40 = loadimage("images/ui/dead40x40.png");
 
-  img_printer = loadimage(DATA_PREFIX "images/ui/printer.png");
-  img_printer_wait = loadimage(DATA_PREFIX "images/ui/printer_wait.png");
+  img_printer = loadimage("images/ui/printer.png");
+  img_printer_wait = loadimage("images/ui/printer_wait.png");
 
-  img_save_over = loadimage(DATA_PREFIX "images/ui/save_over.png");
+  img_save_over = loadimage("images/ui/save_over.png");
 
-  img_grow = loadimage(DATA_PREFIX "images/ui/grow.png");
-  img_shrink = loadimage(DATA_PREFIX "images/ui/shrink.png");
+  img_grow = loadimage("images/ui/grow.png");
+  img_shrink = loadimage("images/ui/shrink.png");
 
-  img_magic_paint = loadimage(DATA_PREFIX "images/ui/magic_paint.png");
-  img_magic_fullscreen = loadimage(DATA_PREFIX "images/ui/magic_fullscreen.png");
+  img_magic_paint = loadimage("images/ui/magic_paint.png");
+  img_magic_fullscreen = loadimage("images/ui/magic_fullscreen.png");
 
-  img_bold = loadimage(DATA_PREFIX "images/ui/bold.png");
-  img_italic = loadimage(DATA_PREFIX "images/ui/italic.png");
+  img_bold = loadimage("images/ui/bold.png");
+  img_italic = loadimage("images/ui/italic.png");
 
-  img_label = loadimage(DATA_PREFIX "images/tools/label.png");
-  img_label_select = loadimage(DATA_PREFIX "images/tools/label_select.png");
+  img_label = loadimage("images/tools/label.png");
+  img_label_select = loadimage("images/tools/label_select.png");
 
   show_progress_bar(screen);
 
-  tmp_imgcurup = loadimage(DATA_PREFIX "images/ui/cursor_up_large.png");
-  tmp_imgcurdown = loadimage(DATA_PREFIX "images/ui/cursor_down_large.png");
+  tmp_imgcurup = loadimage("images/ui/cursor_up_large.png");
+  tmp_imgcurdown = loadimage("images/ui/cursor_down_large.png");
   img_cursor_up = thumbnail(tmp_imgcurup, THUMB_W, THUMB_H, 0);
   img_cursor_down = thumbnail(tmp_imgcurdown, THUMB_W, THUMB_H, 0);
 
-  tmp_imgcurup = loadimage(DATA_PREFIX "images/ui/cursor_starter_up.png");
-  tmp_imgcurdown = loadimage(DATA_PREFIX "images/ui/cursor_starter_down.png");
+  tmp_imgcurup = loadimage("images/ui/cursor_starter_up.png");
+  tmp_imgcurdown = loadimage("images/ui/cursor_starter_down.png");
   img_cursor_starter_up = thumbnail(tmp_imgcurup, THUMB_W, THUMB_H, 0);
   img_cursor_starter_down = thumbnail(tmp_imgcurdown, THUMB_W, THUMB_H, 0);
   SDL_FreeSurface(tmp_imgcurup);
@@ -21362,22 +21422,21 @@ static void setup(void)
 
   show_progress_bar(screen);
 
-  img_scroll_up = loadimage(DATA_PREFIX "images/ui/scroll_up.png");
-  img_scroll_down = loadimage(DATA_PREFIX "images/ui/scroll_down.png");
+  img_scroll_up = loadimage("images/ui/scroll_up.png");
+  img_scroll_down = loadimage("images/ui/scroll_down.png");
 
-  img_scroll_up_off = loadimage(DATA_PREFIX "images/ui/scroll_up_off.png");
-  img_scroll_down_off =
-    loadimage(DATA_PREFIX "images/ui/scroll_down_off.png");
+  img_scroll_up_off = loadimage("images/ui/scroll_up_off.png");
+  img_scroll_down_off = loadimage("images/ui/scroll_down_off.png");
 
 #ifdef LOW_QUALITY_COLOR_SELECTOR
-  img_paintcan = loadimage(DATA_PREFIX "images/ui/paintcan.png");
+  img_paintcan = loadimage("images/ui/paintcan.png");
 #endif
 
   show_progress_bar(screen);
 
 
   /* Load brushes: */
-  load_brush_dir(screen, DATA_PREFIX "brushes");
+  load_brush_dir(screen, "brushes");
   homedirdir = get_fname("brushes", DIR_DATA);
   load_brush_dir(screen, homedirdir);
 #ifdef WIN32
@@ -21389,8 +21448,8 @@ static void setup(void)
   if (num_brushes == 0)
   {
     fprintf(stderr,
-	    "\nError: No brushes found in " DATA_PREFIX "brushes/\n"
-	    "or %s\n\n", homedirdir);
+	    "\nError: No brushes found in %s/brushes/\n"
+	    "or %s\n\n", DATA_PREFIX, homedirdir);
     cleanup();
     exit(1);
   }
@@ -21401,16 +21460,16 @@ static void setup(void)
   /* Load system fonts: */
 
   large_font = TuxPaint_Font_OpenFont(PANGO_DEFAULT_FONT,
-				      DATA_PREFIX "fonts/default_font.ttf",
+				      "fonts/default_font.ttf",
 			               30 - (only_uppercase * 3));
 
   if (large_font == NULL)
   {
     fprintf(stderr,
 	    "\nError: Can't load font file: "
-	    DATA_PREFIX "fonts/default_font.ttf\n"
+	    "%s/fonts/default_font.ttf\n"
 	    "The Simple DirectMedia Layer error that occurred was:\n"
-	    "%s\n\n", SDL_GetError());
+	    "%s\n\n", DATA_PREFIX, SDL_GetError());
 
     cleanup();
     exit(1);
@@ -21418,7 +21477,7 @@ static void setup(void)
 
 
   small_font = TuxPaint_Font_OpenFont(PANGO_DEFAULT_FONT,
-			    DATA_PREFIX "fonts/default_font.ttf",
+			    "fonts/default_font.ttf",
 #ifdef __APPLE__
 			    12 - (only_uppercase * 2));
 #else
@@ -21429,9 +21488,9 @@ static void setup(void)
   {
     fprintf(stderr,
 	    "\nError: Can't load font file: "
-	    DATA_PREFIX "fonts/default_font.ttf\n"
+	    "%s/fonts/default_font.ttf\n"
 	    "The Simple DirectMedia Layer error that occurred was:\n"
-	    "%s\n\n", SDL_GetError());
+	    "%s\n\n", DATA_PREFIX, SDL_GetError());
 
     cleanup();
     exit(1);
@@ -21473,12 +21532,12 @@ static void setup(void)
 
   show_progress_bar(screen);
 
-  img_mouse = loadimage(DATA_PREFIX "images/ui/mouse.png");
-  img_mouse_click = loadimage(DATA_PREFIX "images/ui/mouse_click.png");
+  img_mouse = loadimage("images/ui/mouse.png");
+  img_mouse_click = loadimage("images/ui/mouse_click.png");
 
   show_progress_bar(screen);
 
-  img_color_picker = loadimage(DATA_PREFIX "images/ui/color_picker.png");
+  img_color_picker = loadimage("images/ui/color_picker.png");
 
   /* Create toolbox and selector labels: */
 
@@ -21512,7 +21571,7 @@ static void setup(void)
 #ifndef LOW_QUALITY_COLOR_SELECTOR
 
   /* Create appropriately-shaped buttons: */
-  img1 = loadimage(DATA_PREFIX "images/ui/paintwell.png");
+  img1 = loadimage("images/ui/paintwell.png");
   img_paintwell = thumbnail(img1, color_button_w, color_button_h, 0);
   tmp_btn_up = thumbnail(img_btn_up, color_button_w, color_button_h, 0);
   tmp_btn_down = thumbnail(img_btn_down, color_button_w, color_button_h, 0);
@@ -21774,6 +21833,18 @@ int main(int argc, char *argv[])
   CLOCK_TYPE time2;
   CLOCK_TYPE time3;
 
+  DATA_PREFIX = getenv("TUXPAINT_DATA_PREFIX");
+  if (DATA_PREFIX == NULL)
+    DATA_PREFIX = DEFAULT_DATA_PREFIX;
+
+  MAGIC_PREFIX = getenv("TUXPAINT_MAGIC_PREFIX");
+  if (MAGIC_PREFIX == NULL)
+    MAGIC_PREFIX = DEFAULT_MAGIC_PREFIX;
+
+  LOCALEDIR = getenv("TUXPAINT_LOCALEDIR");
+  if (LOCALEDIR == NULL)
+    LOCALEDIR = DEFAULT_LOCALEDIR;
+
   sugar_init(&argc, &argv);
 
   CLOCK_ASM(time1);