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tuxpaint-pencil-sharpener/magic/src/fade_darken.c
Pere Pujal i Carabantes 0a2072e334 Removing warnings in half of magic tools by some GCI students.
2011-11-26 22:04:50 +00:00

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/*
fade_darken.c
Fade and Darken Magic Tools Plugin
Tux Paint - A simple drawing program for children.
Copyright (c) 2002-2008 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: July 9, 2008
$Id$
*/
#include <stdio.h>
#include <string.h>
#include "tp_magic_api.h"
#include "SDL_image.h"
#include "SDL_mixer.h"
enum {
TOOL_FADE,
TOOL_DARKEN,
NUM_TOOLS
};
static Mix_Chunk * snd_effects[NUM_TOOLS];
/* Local function prototypes: */
int fade_darken_init(magic_api * api);
Uint32 fade_darken_api_version(void);
int fade_darken_get_tool_count(magic_api * api);
SDL_Surface * fade_darken_get_icon(magic_api * api, int which);
char * fade_darken_get_name(magic_api * api, int which);
char * fade_darken_get_description(magic_api * api, int which, int mode);
static void do_fade_darken(void * ptr, int which,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y);
static void do_fade_darken_paint(void * ptr, int which,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y);
void fade_darken_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * last, int ox, int oy, int x, int y,
SDL_Rect * update_rect);
void fade_darken_click(magic_api * api, int which, int mode,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y, SDL_Rect * update_rect);
void fade_darken_release(magic_api * api, int which,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y, SDL_Rect * update_rect);
void fade_darken_shutdown(magic_api * api);
void fade_darken_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
int fade_darken_requires_colors(magic_api * api, int which);
void fade_darken_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
void fade_darken_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
int fade_darken_modes(magic_api * api, int which);
int fade_darken_init(magic_api * api)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%s/sounds/magic/fade.wav",
api->data_directory);
snd_effects[TOOL_FADE] = Mix_LoadWAV(fname);
snprintf(fname, sizeof(fname), "%s/sounds/magic/darken.wav",
api->data_directory);
snd_effects[TOOL_DARKEN] = Mix_LoadWAV(fname);
return(1);
}
Uint32 fade_darken_api_version(void) { return(TP_MAGIC_API_VERSION); }
// Multiple tools:
int fade_darken_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
return(NUM_TOOLS);
}
// Load our icon:
SDL_Surface * fade_darken_get_icon(magic_api * api, int which)
{
char fname[1024];
if (which == TOOL_FADE)
{
snprintf(fname, sizeof(fname), "%s/images/magic/fade.png",
api->data_directory);
}
else if (which == TOOL_DARKEN)
{
snprintf(fname, sizeof(fname), "%s/images/magic/darken.png",
api->data_directory);
}
return(IMG_Load(fname));
}
// Return our name, localized:
char * fade_darken_get_name(magic_api * api ATTRIBUTE_UNUSED, int which)
{
if (which == TOOL_FADE)
return(strdup(gettext_noop("Lighten")));
else if (which == TOOL_DARKEN)
return(strdup(gettext_noop("Darken")));
return(NULL);
}
// Return our description, localized:
char * fade_darken_get_description(magic_api * api ATTRIBUTE_UNUSED, int which, int mode)
{
if (which == TOOL_FADE)
{
if (mode == MODE_PAINT)
return(strdup(gettext_noop("Click and move the mouse to lighten parts of your picture.")));
else if (mode == MODE_FULLSCREEN)
return(strdup(gettext_noop("Click to lighten your entire picture.")));
}
else if (which == TOOL_DARKEN)
{
if (mode == MODE_PAINT)
return(strdup(gettext_noop("Click and move the mouse to darken parts of your picture.")));
else if (mode == MODE_FULLSCREEN)
return(strdup(gettext_noop("Click to darken your entire picture.")));
}
return(NULL);
}
static void do_fade_darken(void * ptr, int which,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y)
{
Uint8 r, g, b;
magic_api * api = (magic_api *) ptr;
SDL_GetRGB(api->getpixel(last, x, y), last->format, &r, &g, &b);
if (which == TOOL_FADE)
{
r = min(r + 48, 255);
g = min(g + 48, 255);
b = min(b + 48, 255);
}
else if (which == TOOL_DARKEN)
{
r = max(r - 48, 0);
g = max(g - 48, 0);
b = max(b - 48, 0);
}
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, r, g, b));
}
// Callback that does the fade_darken color effect on a circle centered around x,y
static void do_fade_darken_paint(void * ptr, int which,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y)
{
int xx, yy;
magic_api * api = (magic_api *) ptr;
for (yy = y - 16; yy < y + 16; yy++)
{
for (xx = x - 16; xx < x + 16; xx++)
{
if (api->in_circle(xx - x, yy - y, 16) &&
!api->touched(xx, yy))
{
do_fade_darken(api, which, canvas, last, xx, yy);
}
}
}
}
// Ask Tux Paint to call our 'do_fade_darken_paint()' callback over a line
void fade_darken_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * last, int ox, int oy, int x, int y,
SDL_Rect * update_rect)
{
SDL_LockSurface(last);
SDL_LockSurface(canvas);
api->line((void *) api, which, canvas, last, ox, oy, x, y, 1, do_fade_darken_paint);
SDL_UnlockSurface(canvas);
SDL_UnlockSurface(last);
api->playsound(snd_effects[which], (x * 255) / canvas->w, 255);
if (ox > x) { int tmp = ox; ox = x; x = tmp; }
if (oy > y) { int tmp = oy; oy = y; y = tmp; }
update_rect->x = ox - 16;
update_rect->y = oy - 16;
update_rect->w = (x + 16) - update_rect->x;
update_rect->h = (y + 16) - update_rect->y;
}
// Ask Tux Paint to call our 'do_fade_darken_paint()' callback at a single point,
// or 'do_fade_darken()' on the entire image
void fade_darken_click(magic_api * api, int which, int mode,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y, SDL_Rect * update_rect)
{
if (mode == MODE_PAINT)
fade_darken_drag(api, which, canvas, last, x, y, x, y, update_rect);
else
{
int xx, yy;
for (yy = 0; yy < canvas->h; yy++)
for (xx = 0; xx < canvas->w; xx++)
do_fade_darken(api, which, canvas, last, xx, yy);
update_rect->x = 0;
update_rect->y = 0;
update_rect->w = canvas->w;
update_rect->h = canvas->h;
/* FIXME: Play sfx */
}
}
// Release
void fade_darken_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)
{
}
// No setup happened:
void fade_darken_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
if (snd_effects[0] != NULL)
Mix_FreeChunk(snd_effects[0]);
if (snd_effects[1] != NULL)
Mix_FreeChunk(snd_effects[1]);
}
// We don't use colors
void fade_darken_set_color(magic_api * api ATTRIBUTE_UNUSED,
Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED, Uint8 b ATTRIBUTE_UNUSED)
{
}
// We don't use colors
int fade_darken_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return 0;
}
void fade_darken_switchin(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
}
void fade_darken_switchout(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
}
int fade_darken_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return(MODE_PAINT | MODE_FULLSCREEN);
}
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