270 lines
7.1 KiB
C
270 lines
7.1 KiB
C
/*
|
|
tint.c
|
|
|
|
tint, Tin the image into one colour or threshold it into pure colour and white
|
|
Tux Paint - A simple drawing program for children.
|
|
|
|
Credits: Andrew Corcoran <akanewbie@gmail.com>
|
|
|
|
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 8, 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>
|
|
|
|
#ifndef gettext_noop
|
|
#define gettext_noop(String) String
|
|
#endif
|
|
|
|
enum {
|
|
TOOL_TINT,
|
|
TOOL_THRESHOLD,
|
|
tint_NUM_TOOLS
|
|
};
|
|
static Uint8 tint_r, tint_g, tint_b;
|
|
static int tint_min = INT_MAX;
|
|
static int tint_max = 0;
|
|
|
|
static const int tint_RADIUS =16;
|
|
|
|
static Mix_Chunk * tint_snd_effect[tint_NUM_TOOLS];
|
|
|
|
const char * tint_snd_filenames[tint_NUM_TOOLS] = {
|
|
"tint.wav",
|
|
"flip.wav"
|
|
};
|
|
const char * tint_icon_filenames[tint_NUM_TOOLS] = {
|
|
"tint.png",
|
|
"flip.png"
|
|
};
|
|
const char * tint_names[tint_NUM_TOOLS] = {
|
|
gettext_noop("Tint"),
|
|
gettext_noop("Threshold")
|
|
};
|
|
const char * tint_descs[tint_NUM_TOOLS][2] = {
|
|
{gettext_noop("Click and move the mouse around to change the color of parts of the picture."),
|
|
gettext_noop("Click to change the colour of the entire image."),},
|
|
{gettext_noop("Click and move the mouse around to threshold the image into pure colour and white regions."),
|
|
gettext_noop("Click to threshold the entire image into pure colour and white regions.")}
|
|
};
|
|
|
|
Uint32 tint_api_version(void) { return(TP_MAGIC_API_VERSION); }
|
|
|
|
//Load sounds
|
|
int tint_init(magic_api * api){
|
|
int i;
|
|
char fname[1024];
|
|
|
|
for (i = 0; i < tint_NUM_TOOLS; i++){
|
|
snprintf(fname, sizeof(fname), "%s/sounds/magic/%s", api->data_directory, tint_snd_filenames[i]);
|
|
tint_snd_effect[i] = Mix_LoadWAV(fname);
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
int tint_get_tool_count(magic_api * api){
|
|
return(tint_NUM_TOOLS);
|
|
}
|
|
|
|
// Load our icons:
|
|
SDL_Surface * tint_get_icon(magic_api * api, int which){
|
|
char fname[1024];
|
|
snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, tint_icon_filenames[which]);
|
|
return(IMG_Load(fname));
|
|
}
|
|
|
|
// Return our names, localized:
|
|
char * tint_get_name(magic_api * api, int which){
|
|
return(strdup(gettext(tint_names[which])));
|
|
}
|
|
|
|
// Return our descriptions, localized:
|
|
char * tint_get_description(magic_api * api, int which, int mode){
|
|
return(strdup(gettext(tint_descs[which][mode-1])));
|
|
}
|
|
|
|
//Calculates the grey scale value for a rgb pixel
|
|
static int tint_grey(Uint8 r1,Uint8 g1,Uint8 b1){
|
|
return 0.3*r1+.59*g1+0.11*b1;
|
|
}
|
|
|
|
static void do_tint_pixel(void * ptr, int which,
|
|
SDL_Surface * canvas, SDL_Surface * last,
|
|
int x, int y){
|
|
|
|
magic_api * api = (magic_api *) ptr;
|
|
Uint8 r,g,b;
|
|
float h,s,v;
|
|
|
|
SDL_GetRGB(api->getpixel(last, x, y), last->format, &r, &g, &b);
|
|
{
|
|
|
|
int greyValue = tint_grey(r,g,b);
|
|
|
|
if (which == TOOL_TINT){
|
|
api->rgbtohsv(tint_r, tint_g, tint_b, &h, &s, &v);
|
|
api->hsvtorgb(h, s, greyValue/255.0, &r, &g, &b);
|
|
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, r, g, b));
|
|
}else if (which == TOOL_THRESHOLD){
|
|
int thresholdValue = (tint_max-tint_min)/2;
|
|
if (greyValue < thresholdValue){
|
|
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, tint_r, tint_g, tint_b));
|
|
}else{
|
|
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, 255, 255, 255));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Do the effect:
|
|
static void do_tint_full(void * ptr,SDL_Surface * canvas, SDL_Surface * last, int which){
|
|
|
|
magic_api * api = (magic_api *) ptr;
|
|
|
|
int x,y;
|
|
for (y = 0; y < last->h; y++){
|
|
for (x=0; x < last->w; x++){
|
|
do_tint_pixel(ptr, which, canvas, last, x, y);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void do_tint_brush(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 - tint_RADIUS; yy < y + tint_RADIUS; yy++)
|
|
{
|
|
for (xx = x - tint_RADIUS; xx < x + tint_RADIUS; xx++)
|
|
{
|
|
if (api->in_circle(xx - x, yy - y, tint_RADIUS) &&
|
|
!api->touched(xx, yy))
|
|
{
|
|
do_tint_pixel(api, which, canvas, last, xx, yy);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Affect the canvas on drag:
|
|
void tint_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_tint_brush);
|
|
|
|
api->playsound(tint_snd_effect[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 - tint_RADIUS;
|
|
update_rect->y = oy - tint_RADIUS;
|
|
update_rect->w = (x + tint_RADIUS) - update_rect->x;
|
|
update_rect->h = (y + tint_RADIUS) - update_rect->y;
|
|
}
|
|
|
|
// Affect the canvas on click:
|
|
void tint_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)
|
|
tint_drag(api, which, canvas, last, x, y, x, y, update_rect);
|
|
else{
|
|
update_rect->x = 0;
|
|
update_rect->y = 0;
|
|
update_rect->w = canvas->w;
|
|
update_rect->h = canvas->h;
|
|
do_tint_full(api, canvas, last, which);
|
|
api->playsound(tint_snd_effect[which], 128, 255);
|
|
}
|
|
}
|
|
|
|
// Affect the canvas on release:
|
|
void tint_release(magic_api * api, int which,
|
|
SDL_Surface * canvas, SDL_Surface * last,
|
|
int x, int y, SDL_Rect * update_rect)
|
|
{
|
|
}
|
|
|
|
// No setup happened:
|
|
void tint_shutdown(magic_api * api)
|
|
{
|
|
//Clean up sounds
|
|
int i;
|
|
for(i=0; i<tint_NUM_TOOLS; i++){
|
|
if(tint_snd_effect[i] != NULL){
|
|
Mix_FreeChunk(tint_snd_effect[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Record the color from Tux Paint:
|
|
void tint_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
|
|
{
|
|
tint_r = r;
|
|
tint_g = g;
|
|
tint_b = b;
|
|
}
|
|
|
|
// Use colors:
|
|
int tint_requires_colors(magic_api * api, int which)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
void tint_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas){
|
|
|
|
int x,y;
|
|
Uint8 r1,g1,b1;
|
|
|
|
for (y = 0; y < canvas->h; y++){
|
|
for (x=0; x < canvas->w; x++){
|
|
SDL_GetRGB(api->getpixel(canvas, x, y), canvas->format, &r1, &g1, &b1);
|
|
{
|
|
int greyValue = tint_grey(r1,g1,b1);
|
|
if (greyValue<tint_min){
|
|
tint_min=greyValue;
|
|
}
|
|
if (greyValue>tint_max){
|
|
tint_max=greyValue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void tint_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas)
|
|
{
|
|
}
|
|
|
|
int tint_modes(magic_api * api, int which)
|
|
{
|
|
return(MODE_FULLSCREEN|MODE_PAINT);
|
|
}
|