244 lines
6.5 KiB
C
244 lines
6.5 KiB
C
/*
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rain.c
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rain, Add a rain effect to the image
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Tux Paint - A simple drawing program for children.
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Credits: Andrew Corcoran <akanewbie@gmail.com>
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Copyright (c) 2002-2007 by Bill Kendrick and others; see AUTHORS.txt
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bill@newbreedsoftware.com
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http://www.tuxpaint.org/
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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(See COPYING.txt)
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Last updated: October 4, 2008
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$Id$
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*/
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#include <stdio.h>
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#include <string.h>
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#include <libintl.h>
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#include "tp_magic_api.h"
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#include "SDL_image.h"
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#include "SDL_mixer.h"
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#include <math.h>
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#include <limits.h>
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#include <time.h>
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#ifndef gettext_noop
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#define gettext_noop(String) String
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#endif
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void rain_click(magic_api *, int, int, SDL_Surface *, SDL_Surface *, int, int, SDL_Rect *);
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static const int rain_SIZE = 30;
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static const int rain_AMOUNT = 200;
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enum {
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TOOL_rain,
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rain_NUM_TOOLS
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};
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static Mix_Chunk * rain_snd_effect[rain_NUM_TOOLS];
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const char * rain_snd_filenames[rain_NUM_TOOLS] = {
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"flip.wav",
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};
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const char * rain_icon_filenames[rain_NUM_TOOLS] = {
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"rain.png",
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};
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const char * rain_names[rain_NUM_TOOLS] = {
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gettext_noop("Rain"),
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};
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const char * rain_descs[rain_NUM_TOOLS][2] = {
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{gettext_noop("Click to place a rain drop onto your picture."),
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gettext_noop("Click to cover your picture with rain drops."),},
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};
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Uint32 rain_api_version(void) { return(TP_MAGIC_API_VERSION); }
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//Checks if a a pixel is inside a raindrop shape centered on the origin
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static int rain_inRainShape(double x, double y, double r){
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if ( sqrt( x*x + y*y ) < ( r * pow( cos( atan2(x,y) ), 10.0) ) ){
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return 1;
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}
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return 0;
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}
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int rain_init(magic_api * api){
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int i;
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char fname[1024];
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//Load sounds
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for (i = 0; i < rain_NUM_TOOLS; i++){
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snprintf(fname, sizeof(fname), "%s/sounds/magic/%s", api->data_directory, rain_snd_filenames[i]);
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rain_snd_effect[i] = Mix_LoadWAV(fname);
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}
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return(1);
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}
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int rain_get_tool_count(magic_api * api){
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return(rain_NUM_TOOLS);
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}
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// Load our icons:
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SDL_Surface * rain_get_icon(magic_api * api, int which){
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char fname[1024];
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snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, rain_icon_filenames[which]);
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return(IMG_Load(fname));
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}
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// Return our names, localized:
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char * rain_get_name(magic_api * api, int which){
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return(strdup(gettext(rain_names[which])));
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}
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// Return our descriptions, localized:
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char * rain_get_description(magic_api * api, int which, int mode){
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return(strdup(gettext(rain_descs[which][mode-1])));
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}
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// Do the effect:
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static void do_rain_drop(void * ptr, int which, SDL_Surface * canvas, SDL_Surface * last,
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int x, int y){
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magic_api * api = (magic_api *) ptr;
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int xx, yy;
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Uint8 r,g,b;
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for (yy = y - rain_SIZE/2; yy < y + rain_SIZE/2; yy++){
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for (xx = x - rain_SIZE; xx < x + rain_SIZE; xx++){
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if (rain_inRainShape(xx - x, yy - y + rain_SIZE/2, rain_SIZE)){
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//api->rgbtohsv(rain_r, rain_g, rain_b, &h, &s, &v);
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//api->hsvtorgb(h, s, rain_weights[(yy-y)*((rain_SIZE*2) -1)+(xx-x)], &r, &g, &b);
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SDL_GetRGB(api->getpixel(canvas, xx , yy), canvas->format, &r, &g, &b);
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api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, clamp(0, r - 50, 255),
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clamp(0, g - 50, 255),
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clamp(0, b + 200, 255)));
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}
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}
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}
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}
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static void rain_linecb(void * ptr, int which,
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SDL_Surface * canvas, SDL_Surface * last,
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int x, int y)
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{
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magic_api * api = (magic_api *) ptr;
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SDL_Rect rect;
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if (rand() % 10 == 0) {
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rain_click(api, which, MODE_PAINT, canvas, last,
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x + (rand() % rain_SIZE * 2) - rain_SIZE,
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y + (rand() % rain_SIZE * 2) - rain_SIZE,
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&rect);
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}
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}
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// Affect the canvas on drag:
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void rain_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int ox, int oy, int x, int y,
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SDL_Rect * update_rect){
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api->line((void *) api, which, canvas, last, ox, oy, x, y, 1, rain_linecb);
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if (ox > x) { int tmp = ox; ox = x; x = tmp; }
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if (oy > y) { int tmp = oy; oy = y; y = tmp; }
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update_rect->x = ox - rain_SIZE * 2;
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update_rect->y = oy - rain_SIZE * 2;
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update_rect->w = rain_SIZE * 4;
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update_rect->h = rain_SIZE * 4;
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}
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// Affect the canvas on click:
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void rain_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * last,
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int x, int y, SDL_Rect * update_rect){
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if (mode == MODE_PAINT){
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do_rain_drop(api, which, canvas, last, x, y);
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update_rect->x = x - rain_SIZE;
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update_rect->y = y - rain_SIZE;
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update_rect->w = rain_SIZE * 2;
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update_rect->h = rain_SIZE * 2;
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api->playsound(rain_snd_effect[which], (x * 255) / canvas->w, 255);
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}else{
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int i;
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for(i=0; i<rain_AMOUNT; i++){
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do_rain_drop(api, which, canvas, last, rand() % canvas->w, rand() % canvas->h);
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}
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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api->playsound(rain_snd_effect[which], 128, 255);
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}
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}
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// Affect the canvas on release:
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void rain_release(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * last,
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int x, int y, SDL_Rect * update_rect)
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{
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}
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// No setup happened:
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void rain_shutdown(magic_api * api)
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{
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//Clean up sounds
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int i;
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for(i=0; i<rain_NUM_TOOLS; i++){
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if(rain_snd_effect[i] != NULL){
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Mix_FreeChunk(rain_snd_effect[i]);
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}
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}
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}
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// Record the color from Tux Paint:
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void rain_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
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{
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}
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// Use colors:
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int rain_requires_colors(magic_api * api, int which)
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{
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return 0;
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}
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void rain_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas)
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{
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}
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void rain_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas)
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{
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}
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int rain_modes(magic_api * api, int which)
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{
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return(MODE_FULLSCREEN|MODE_PAINT);
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}
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