Added toothpaste.c magic tool

docs/AUTHORS.txt

@@ -46,7 +46,7 @@ $Id$
     implied warranty.
 
   Blur ('entire image' mode), Sharpen, Trace Contour, Silhouette,
-  Snow Flake, Snow Ball, Black & White, Threshold, Alien,
+  Snow Flake, Snow Ball, Black & White, Threshold, Alien, Toothpaste,
   Tint ('Brush' mode), Noise, Rain and Mosaic Magic Tools.
   Jigsaw 3x3 and Jigsaw 5x5 starter images.
   by Andrew 'akanewbie' Corcoran <akanewbie@gmail.com>

docs/CHANGES.txt

@@ -30,6 +30,7 @@ $Id$
       + Noise - Adds random noise to the image.
       + Mosaic - Gives the image a mosaic effect.
       + Rain - Adds rain drops to the image.
+      + Toothpaste - Squirts "toothpaste" on to the image.
       By Andrew 'akanewbie' Corcoran <akanewbie@gmail.com>
       (Part of Tux4Kids' participation in Google Summer of Code 2008)
 

magic/src/toothpaste.c

@@ -0,0 +1,224 @@
+/*
+  toothpaste.c
+
+  toothpaste, Add a toothpaste effect to the image
+  Tux Paint - A simple drawing program for children.
+
+  Credits: Andrew Corcoran <akanewbie@gmail.com>
+
+  Copyright (c) 2002-2007 by Bill Kendrick and others; see AUTHORS.txt
+  bill@newbreedsoftware.com
+  http://www.tuxpaint.org/
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+  (See COPYING.txt)
+
+  Last updated: June 6, 2008
+  $Id$
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <libintl.h>
+#include "tp_magic_api.h"
+#include "SDL_image.h"
+#include "SDL_mixer.h"
+#include <math.h>
+#include <limits.h>
+#include <time.h>
+
+#ifndef gettext_noop
+#define gettext_noop(String) String
+#endif
+
+double pi;
+static Uint8 toothpaste_r, toothpaste_g, toothpaste_b;
+static const int toothpaste_RADIUS = 10;
+double* toothpaste_weights = NULL;
+
+enum {
+	TOOL_toothpaste,
+	toothpaste_NUM_TOOLS
+};
+
+static Mix_Chunk * toothpaste_snd_effect[toothpaste_NUM_TOOLS];
+
+const char * toothpaste_snd_filenames[toothpaste_NUM_TOOLS] = {
+  "flip.wav",
+};
+const char * toothpaste_icon_filenames[toothpaste_NUM_TOOLS] = {
+  "flip.png",
+};
+const char * toothpaste_names[toothpaste_NUM_TOOLS] = {
+  gettext_noop("Toothpaste"),
+};
+const char * toothpaste_descs[toothpaste_NUM_TOOLS] = {
+  gettext_noop("Click and drag to squirt toothpaste onto the image."),
+};
+
+Uint32 toothpaste_api_version(void) { return(TP_MAGIC_API_VERSION); }
+
+
+int toothpaste_init(magic_api * api){
+
+  int i;
+  char fname[1024];
+  //Load sounds
+  for (i = 0; i < toothpaste_NUM_TOOLS; i++){
+    snprintf(fname, sizeof(fname), "%s/sounds/magic/%s", api->data_directory, toothpaste_snd_filenames[i]);
+    toothpaste_snd_effect[i] = Mix_LoadWAV(fname);
+  }
+  
+  //Set up weights
+  pi = acos(0.0) * 2;
+  toothpaste_weights = (double*)malloc(toothpaste_RADIUS*2 * toothpaste_RADIUS*2 * sizeof(double));
+  if (toothpaste_weights == NULL){
+    return(0);
+  }
+
+  int k,j;
+  for (k =  - toothpaste_RADIUS; k <  + toothpaste_RADIUS; k++){
+    for (j =  - toothpaste_RADIUS; j <  + toothpaste_RADIUS; j++){
+      if (api->in_circle(j , k, toothpaste_RADIUS)){
+        toothpaste_weights[(k+toothpaste_RADIUS)*((toothpaste_RADIUS*2) -1)+(j+toothpaste_RADIUS)] = ((fabs(atan2((double)(j),(double)(k))))/pi);
+      }
+    }
+  }
+
+  return(1);
+}
+
+int toothpaste_get_tool_count(magic_api * api){
+  return(toothpaste_NUM_TOOLS);
+}
+
+// Load our icons:
+SDL_Surface * toothpaste_get_icon(magic_api * api, int which){
+  char fname[1024];
+  snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, toothpaste_icon_filenames[which]);
+  return(IMG_Load(fname));
+}
+
+// Return our names, localized:
+char * toothpaste_get_name(magic_api * api, int which){
+    return(strdup(gettext(toothpaste_names[which])));
+}
+
+// Return our descriptions, localized:
+char * toothpaste_get_description(magic_api * api, int which, int mode){
+  return(strdup(gettext(toothpaste_descs[which])));
+}
+
+// Do the effect:
+static void do_toothpaste(void * ptr, int which, SDL_Surface * canvas, SDL_Surface * last,
+                int x, int y){
+  magic_api * api = (magic_api *) ptr;
+
+  int xx, yy;
+  double colr;
+  float h,s,v;
+  Uint8 r,g,b;
+
+  for (yy = y - toothpaste_RADIUS; yy < y + toothpaste_RADIUS; yy++){
+    for (xx = x - toothpaste_RADIUS; xx < x + toothpaste_RADIUS; xx++){
+      if (api->in_circle(xx - x, yy - y, toothpaste_RADIUS) &&
+	  !api->touched(xx, yy)){
+
+        api->rgbtohsv(toothpaste_r, toothpaste_g, toothpaste_b, &h, &s, &v);
+        api->hsvtorgb(h, s, toothpaste_weights[(yy-y+toothpaste_RADIUS)*((toothpaste_RADIUS*2) -1)+(xx-x+toothpaste_RADIUS)], &r, &g, &b);
+        api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r, g, b));
+
+      }
+    }
+  }
+
+}
+
+// Affect the canvas on drag:
+void toothpaste_drag(magic_api * api, int which, SDL_Surface * canvas,
+	          SDL_Surface * last, int ox, int oy, int x, int y,
+		  SDL_Rect * update_rect){
+
+  api->line((void *) api, which, canvas, last, ox, oy, x, y, 1, do_toothpaste);
+
+  api->playsound(toothpaste_snd_effect[which], (x * 255) / canvas->w, 255);
+
+  update_rect->x = 0;
+  update_rect->y = 0;
+  update_rect->w = canvas->w;
+  update_rect->h = canvas->h;
+
+}
+
+// Affect the canvas on click:
+void toothpaste_click(magic_api * api, int which, int mode,
+	           SDL_Surface * canvas, SDL_Surface * last,
+	           int x, int y, SDL_Rect * update_rect){
+
+  toothpaste_drag(api, which, canvas, last, x, y, x, y, update_rect);
+}
+
+// Affect the canvas on release:
+void toothpaste_release(magic_api * api, int which,
+	           SDL_Surface * canvas, SDL_Surface * last,
+	           int x, int y, SDL_Rect * update_rect)
+{
+}
+
+// No setup happened:
+void toothpaste_shutdown(magic_api * api)
+{
+	//Clean up sounds
+	int i;
+	for(i=0; i<toothpaste_NUM_TOOLS; i++){
+		if(toothpaste_snd_effect[i] != NULL){
+			Mix_FreeChunk(toothpaste_snd_effect[i]);
+		}
+	}
+  if (toothpaste_weights != NULL){
+    free(toothpaste_weights);
+    toothpaste_weights = NULL;
+  }
+}
+
+// Record the color from Tux Paint:
+void toothpaste_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
+{
+  toothpaste_r = r;
+  toothpaste_g = g;
+  toothpaste_b = b;
+}
+
+// Use colors:
+int toothpaste_requires_colors(magic_api * api, int which)
+{
+  return 1;
+}
+
+
+void toothpaste_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas)
+{
+}
+
+void toothpaste_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas)
+{
+}
+
+int toothpaste_modes(magic_api * api, int which)
+{
+  return(MODE_PAINT);
+}
+
+