Sound effects for Filled Polygon magic tool

Based on some CC0 sounds by Kenneth Cooney (see AUTHORS.txt and
CHANGES.txt).

docs/AUTHORS.txt

@@ -6,7 +6,7 @@ Copyright (c) 2002-2024
 Various contributors (see below, and CHANGES.txt)
 https://tuxpaint.org/
 
-June 17, 2002 - March 28, 2024
+June 17, 2002 - May 28, 2024
 
 * Design and Coding:
 
@@ -153,6 +153,13 @@ June 17, 2002 - March 28, 2024
   Scanline polygon fill routine based on public-domain code
   by Darel Rex Finley, 2007 <https://alienryderflex.com/polygon_fill/>
 
+  Filled Polygon sound effects (place, move, finish) based on
+  "success_02.wav" (https://freesound.org/people/Kenneth_Cooney/sounds/463067/),
+  "success.wav" (https://freesound.org/people/Kenneth_Cooney/sounds/457547/), &
+  "Completed.wav" (https://freesound.org/people/Kenneth_Cooney/sounds/609336/)
+  respectively.
+  Creative Commons 0 by Kenneth Cooney <https://www.kennethcooney.com/>
+
   Bloom magic tool
   by Bill Kendrick <bill@newbreedsoftware.com>
   Googly Eyes sound effect: "Torch Crackle.wav"

docs/CHANGES.txt

@@ -13,17 +13,19 @@ https://tuxpaint.org/
       with dithered X-and-white pixels.  With "Dither", X is always black,
       or the currently-selected color; with "Dither (Keep Color)", X is
       a muted version of the original color.
-      Bill Kendrick <bill@newbreedsoftware.com>
-      - Sound effects based on "Orion FIll.wav", Creative Commons 0
+      + Code & icon Bill Kendrick <bill@newbreedsoftware.com>
+      + Sound effects based on "Orion FIll.wav", Creative Commons 0
         by KatHakaku <https://freesound.org/people/KatHakaku/>
 
-    * WIP Filled Polygon - Draw points to form a polygon which is filled
-      Bill Kendrick <bill@newbreedsoftware.com>
-      Scanline polygon fill routine based on public-domain code
-      by Darel Rex Finley, 2007 <https://alienryderflex.com/polygon_fill/
+    * Filled Polygon + Draw points to form a polygon which is filled
+      + Code & icon by Bill Kendrick <bill@newbreedsoftware.com>
+      + Scanline polygon fill routine based on public-domain code
+        by Darel Rex Finley, 2007 <https://alienryderflex.com/polygon_fill/
+      + Sound effects based on "success.wav", "success_02.wav", and
+        "Completed.wav", Creative Commons 0 by Kenneth Cooney
+        <https://freesound.org/people/Kenneth_Cooney>
+        <https://www.kennethcooney.com/>
       Closes https://sourceforge.net/p/tuxpaint/feature-requests/251/
-      + WIP Needs sound effect
-      + WIP Needs testing & tweaking
 
   * Magic Tool Improvements:
     ------------------------
@@ -31,8 +33,8 @@ https://tuxpaint.org/
       (via the size option): Red/Cyan, Red/Blue, Red/Green, and Magenta/Cyan.
       (If Tux Paint is running in "Novice" complexity mode, no choices will
       be available; it will use Red/Cyan, as before.)
-      + Idea O'Hare The Rabbit
-      + Coding Bill Kendrick <bill@newbreedsoftware.com>
+      + Idea from O'Hare The Rabbit
+      + Coding by Bill Kendrick <bill@newbreedsoftware.com>
 
   * Improvements to Eraser tool:
     ----------------------------

magic/src/polyfill.c

@@ -7,7 +7,7 @@
    Scanline polygon fill routine based on public-domain code
    by Darel Rex Finley, 2007 <https://alienryderflex.com/polygon_fill/>
 
-   Last updated: May 19, 2024
+   Last updated: May 28, 2024
 */
 
 
@@ -38,8 +38,17 @@ char *polyfill_icon_filenames[NUM_TOOLS] = {
   "polyfill.png",
 };
 
-char *polyfill_snd_filenames[NUM_TOOLS] = {
-  "dither.ogg",                 // FIXME
+enum {
+  SND_PLACE,
+  SND_MOVE,
+  SND_FINISH,
+  NUM_SOUNDS
+};
+
+char *polyfill_snd_filenames[NUM_SOUNDS] = {
+  "polyfill_place.ogg",
+  "polyfill_move.ogg",
+  "polyfill_finish.ogg",
 };
 
 #define SNAP_SIZE 16
@@ -54,7 +63,7 @@ int polyfill_editing = MAX_PTS;
 int polyfill_dragged = 0;
 int polyfill_active = 0;
 
-Mix_Chunk *snd_effects[NUM_TOOLS];
+Mix_Chunk *snd_effects[NUM_SOUNDS];
 
 Uint32 polyfill_color, polyfill_color_red, polyfill_color_green;
 
@@ -108,7 +117,7 @@ int polyfill_init(magic_api * api, Uint8 disabled_features ATTRIBUTE_UNUSED, Uin
   int i;
   char filename[1024];
 
-  for (i = 0; i < NUM_TOOLS; i++)
+  for (i = 0; i < NUM_SOUNDS; i++)
   {
     snprintf(filename, sizeof(filename), "%ssounds/magic/%s", api->data_directory, polyfill_snd_filenames[i]);
     snd_effects[i] = Mix_LoadWAV(filename);
@@ -185,7 +194,7 @@ void polyfill_shutdown(magic_api * api ATTRIBUTE_UNUSED)
 {
   int i;
 
-  for (i = 0; i < NUM_TOOLS; i++)
+  for (i = 0; i < NUM_SOUNDS; i++)
   {
     if (snd_effects[i] != NULL)
     {
@@ -246,6 +255,7 @@ polyfill_click(magic_api * api, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_U
 
     /* Add the new point */
     polyfill_drag(api, which, canvas, snapshot, x, y, x, y, update_rect);
+    api->playsound(snd_effects[SND_PLACE], (x * 255) / canvas->w, 255);
   }
   else
   {
@@ -271,6 +281,7 @@ polyfill_drag(magic_api * api, int which ATTRIBUTE_UNUSED,
   polyfill_pt_y[polyfill_editing] = y;
 
   polyfill_draw_preview(api, canvas, 1);
+  api->playsound(snd_effects[SND_MOVE], (x * 255) / canvas->w, 255);
 
   update_rect->x = 0;
   update_rect->y = 0;
@@ -389,11 +400,15 @@ polyfill_release(magic_api * api, int which ATTRIBUTE_UNUSED,
 
     polyfill_draw_final(canvas);
 
+    /* Reset points */
     polyfill_num_pts = 0;
     polyfill_editing = MAX_PTS;
 
     /* Update snapshot ahead of next polygon */
     SDL_BlitSurface(canvas, NULL, polyfill_snapshot, NULL);
+ 
+    /* Play "finish" sound effect */ 
+    api->playsound(snd_effects[SND_FINISH], 128 /* TODO could be clever and determine midpoint of polygon */, 255);
   }
   else
   {