1 /*
2 emboss.c
3
4 Emboss Magic Tool Plugin
5 Tux Paint - A simple drawing program for children.
6
7 Copyright (c) 2002-2019 by Bill Kendrick and others; see AUTHORS.txt
8 bill@newbreedsoftware.com
9 http://www.tuxpaint.org/
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 (See COPYING.txt)
25
26 Last updated: August 29, 2019
27 $Id$
28 */
29
30 #include <stdio.h>
31 #include <string.h>
32 #include "tp_magic_api.h"
33 #include "SDL_image.h"
34 #include "SDL_mixer.h"
35
36 /* Our globals: */
37
38 static Mix_Chunk *emboss_snd;
39
40 // Prototypes
41 Uint32 emboss_api_version(void);
42 int emboss_init(magic_api * api);
43 int emboss_get_tool_count(magic_api * api);
44 SDL_Surface *emboss_get_icon(magic_api * api, int which);
45 char *emboss_get_name(magic_api * api, int which);
46 char *emboss_get_description(magic_api * api, int which, int mode);
47
48 void emboss_drag(magic_api * api, int which, SDL_Surface * canvas,
49 SDL_Surface * last, int ox, int oy, int x, int y, SDL_Rect * update_rect);
50
51 void emboss_click(magic_api * api, int which, int mode,
52 SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
53
54 void emboss_release(magic_api * api, int which,
55 SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
56
57 void emboss_shutdown(magic_api * api);
58 void emboss_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
59 int emboss_requires_colors(magic_api * api, int which);
60 void emboss_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
61 void emboss_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
62 int emboss_modes(magic_api * api, int which);
63
64
emboss_api_version(void)65 Uint32 emboss_api_version(void)
66 {
67 return (TP_MAGIC_API_VERSION);
68 }
69
70
71 // No setup required:
emboss_init(magic_api * api)72 int emboss_init(magic_api * api)
73 {
74 char fname[1024];
75
76 snprintf(fname, sizeof(fname), "%s/sounds/magic/emboss.ogg", api->data_directory);
77 emboss_snd = Mix_LoadWAV(fname);
78
79 return (1);
80 }
81
82 // We have multiple tools:
emboss_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)83 int emboss_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
84 {
85 return (1);
86 }
87
88 // Load our icons:
emboss_get_icon(magic_api * api,int which ATTRIBUTE_UNUSED)89 SDL_Surface *emboss_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
90 {
91 char fname[1024];
92
93 snprintf(fname, sizeof(fname), "%s/images/magic/emboss.png", api->data_directory);
94
95 return (IMG_Load(fname));
96 }
97
98 // Return our names, localized:
emboss_get_name(magic_api * api ATTRIBUTE_UNUSED,int which ATTRIBUTE_UNUSED)99 char *emboss_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
100 {
101 return (strdup(gettext_noop("Emboss")));
102 }
103
104 // Return our descriptions, localized:
emboss_get_description(magic_api * api ATTRIBUTE_UNUSED,int which ATTRIBUTE_UNUSED,int mode ATTRIBUTE_UNUSED)105 char *emboss_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
106 {
107 return (strdup(gettext_noop("Click and drag the mouse to emboss the picture.")));
108 }
109
110 // Do the effect:
111
do_emboss(void * ptr,int which ATTRIBUTE_UNUSED,SDL_Surface * canvas,SDL_Surface * last,int x,int y)112 static void do_emboss(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
113 {
114 magic_api *api = (magic_api *) ptr;
115 int xx, yy;
116 Uint8 r1, g1, b1, r2, g2, b2;
117 int r;
118 float h, s, v;
119 int avg1, avg2;
120
121 for (yy = -16; yy < 16; yy++)
122 {
123 for (xx = -16; xx < 16; xx++)
124 {
125 if (api->in_circle(xx, yy, 16))
126 {
127 if (!api->touched(x + xx, y + yy))
128 {
129 SDL_GetRGB(api->getpixel(last, x + xx, y + yy), last->format, &r1, &g1, &b1);
130 SDL_GetRGB(api->getpixel(last, x + xx + 2, y + yy + 2), last->format, &r2, &g2, &b2);
131
132 avg1 = (r1 + g1 + b1) / 3;
133 avg2 = (r2 + g2 + b2) / 3;
134
135 api->rgbtohsv(r1, g1, b1, &h, &s, &v);
136
137 r = 128 + (((avg1 - avg2) * 3) / 2);
138 if (r < 0)
139 r = 0;
140 if (r > 255)
141 r = 255;
142
143 v = (r / 255.0);
144
145 api->hsvtorgb(h, s, v, &r1, &g1, &b1);
146
147 api->putpixel(canvas, x + xx, y + yy, SDL_MapRGB(canvas->format, r1, g1, b1));
148 }
149 }
150 }
151 }
152 }
153
154 // Affect the canvas on drag:
emboss_drag(magic_api * api,int which,SDL_Surface * canvas,SDL_Surface * last,int ox,int oy,int x,int y,SDL_Rect * update_rect)155 void emboss_drag(magic_api * api, int which, SDL_Surface * canvas,
156 SDL_Surface * last, int ox, int oy, int x, int y, SDL_Rect * update_rect)
157 {
158 api->line((void *)api, which, canvas, last, ox, oy, x, y, 1, do_emboss);
159
160 if (ox > x)
161 {
162 int tmp = ox;
163
164 ox = x;
165 x = tmp;
166 }
167 if (oy > y)
168 {
169 int tmp = oy;
170
171 oy = y;
172 y = tmp;
173 }
174
175 update_rect->x = ox - 16;
176 update_rect->y = oy - 16;
177 update_rect->w = (x + 16) - update_rect->x;
178 update_rect->h = (y + 16) - update_rect->h;
179
180 api->playsound(emboss_snd, (x * 255) / canvas->w, 255);
181 }
182
183 // Affect the canvas on click:
emboss_click(magic_api * api,int which,int mode ATTRIBUTE_UNUSED,SDL_Surface * canvas,SDL_Surface * last,int x,int y,SDL_Rect * update_rect)184 void emboss_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
185 SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
186 {
187 emboss_drag(api, which, canvas, last, x, y, x, y, update_rect);
188 }
189
190 // Affect the canvas on release:
emboss_release(magic_api * api ATTRIBUTE_UNUSED,int which ATTRIBUTE_UNUSED,SDL_Surface * canvas ATTRIBUTE_UNUSED,SDL_Surface * last ATTRIBUTE_UNUSED,int x ATTRIBUTE_UNUSED,int y ATTRIBUTE_UNUSED,SDL_Rect * update_rect ATTRIBUTE_UNUSED)191 void emboss_release(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
192 SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED,
193 int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
194 {
195 }
196
197 // No setup happened:
emboss_shutdown(magic_api * api ATTRIBUTE_UNUSED)198 void emboss_shutdown(magic_api * api ATTRIBUTE_UNUSED)
199 {
200 if (emboss_snd != NULL)
201 Mix_FreeChunk(emboss_snd);
202 }
203
204 // Record the color from Tux Paint:
emboss_set_color(magic_api * api ATTRIBUTE_UNUSED,Uint8 r ATTRIBUTE_UNUSED,Uint8 g ATTRIBUTE_UNUSED,Uint8 b ATTRIBUTE_UNUSED)205 void emboss_set_color(magic_api * api ATTRIBUTE_UNUSED, Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED,
206 Uint8 b ATTRIBUTE_UNUSED)
207 {
208 }
209
210 // Use colors:
emboss_requires_colors(magic_api * api ATTRIBUTE_UNUSED,int which ATTRIBUTE_UNUSED)211 int emboss_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
212 {
213 return 0;
214 }
215
emboss_switchin(magic_api * api ATTRIBUTE_UNUSED,int which ATTRIBUTE_UNUSED,int mode ATTRIBUTE_UNUSED,SDL_Surface * canvas ATTRIBUTE_UNUSED)216 void emboss_switchin(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
217 SDL_Surface * canvas ATTRIBUTE_UNUSED)
218 {
219 }
220
emboss_switchout(magic_api * api ATTRIBUTE_UNUSED,int which ATTRIBUTE_UNUSED,int mode ATTRIBUTE_UNUSED,SDL_Surface * canvas ATTRIBUTE_UNUSED)221 void emboss_switchout(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
222 SDL_Surface * canvas ATTRIBUTE_UNUSED)
223 {
224 }
225
emboss_modes(magic_api * api ATTRIBUTE_UNUSED,int which ATTRIBUTE_UNUSED)226 int emboss_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
227 {
228 return (MODE_PAINT); /* FIXME - Can also be turned into a full-image effect */
229 }
230