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tuxpaint-pencil-sharpener/magic/src/fisheye.c
Pere Pujal i Carabantes f836cc775a Magic tools: Inline->static for android, corrected paths to avoid double slash which makes SDL2 not loading the stuff from assets. 
Thoose changes were already in the SDL2 and android versions, they were reverted somehow...
2018-02-28 00:23:15 +01:00

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/*
fisheye.c
fisheye, Fisheye tool
Tux Paint - A simple drawing program for children.
Credits: Adam 'foo-script' Rakowski ; foo-script@o2.pl
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)
*/
#include <math.h>
#include "tp_magic_api.h"
#include "SDL_image.h"
#include "SDL_mixer.h"
Mix_Chunk *fisheye_snd;
int last_x, last_y;
/* Local function prototypes */
Uint32 fisheye_api_version(void);
void fisheye_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
int fisheye_init(magic_api * api);
int fisheye_get_tool_count(magic_api * api);
SDL_Surface *fisheye_get_icon(magic_api * api, int which);
char *fisheye_get_name(magic_api * api, int which);
char *fisheye_get_description(magic_api * api, int which, int mode);
int fisheye_requires_colors(magic_api * api, int which);
void fisheye_release(magic_api * api, int which,
SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y, SDL_Rect * update_rect);
void fisheye_shutdown(magic_api * api);
void fisheye_draw(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
void fisheye_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int ox, int oy, int x, int y, SDL_Rect * update_rect);
void fisheye_click(magic_api * api, int which, int mode,
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
void fisheye_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
void fisheye_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
int fisheye_modes(magic_api * api, int which);
// Housekeeping functions
void fisheye_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int ox, int oy, int x, int y, SDL_Rect * update_rect);
Uint32 fisheye_api_version(void)
{
return (TP_MAGIC_API_VERSION);
}
void fisheye_set_color(magic_api * api ATTRIBUTE_UNUSED, Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED,
Uint8 b ATTRIBUTE_UNUSED)
{
}
int fisheye_init(magic_api * api)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%ssounds/magic/fisheye.ogg", api->data_directory);
fisheye_snd = Mix_LoadWAV(fname);
return (1);
}
int fisheye_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
return 1;
}
SDL_Surface *fisheye_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%simages/magic/fisheye.png", api->data_directory);
return (IMG_Load(fname));
}
char *fisheye_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return strdup(gettext_noop("Fisheye"));
} //Needs better name
char *fisheye_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
{
return strdup(gettext_noop("Click on part of your picture to create a fisheye effect."));
}
int fisheye_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return 0;
}
void fisheye_release(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * snapshot ATTRIBUTE_UNUSED,
int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
{
}
void fisheye_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
Mix_FreeChunk(fisheye_snd);
}
// do-fisheye
void fisheye_draw(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas, SDL_Surface * last ATTRIBUTE_UNUSED,
int x, int y)
{
magic_api *api = (magic_api *) ptr;
SDL_Surface *oryg, *temp_src, *temp_dest, *output;
SDL_Rect rect, temp_rect;
int xx, yy;
unsigned short int i;
if (api->in_circle(last_x - x, last_y - y, 80))
return;
last_x = x;
last_y = y;
oryg = SDL_CreateRGBSurface(SDL_SWSURFACE, 80, 80, canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask,
canvas->format->Amask);
output = SDL_CreateRGBSurface(SDL_SWSURFACE, 80, 80, canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask,
canvas->format->Amask);
rect.x = x - 40;
rect.y = y - 40;
rect.w = rect.h = 80;
SDL_BlitSurface(canvas, &rect, oryg, NULL); //here we have a piece of source image. Now we've to scale it (keeping aspect ratio)
//do vertical fisheye
for (i = 0; i < 40; i++)
{
temp_src = SDL_CreateRGBSurface(SDL_SWSURFACE, 1, 80, canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask,
canvas->format->Amask);
//let's take a smooth bar of scaled bitmap and copy it to temp
//left side first
rect.x = i;
rect.y = 0;
rect.w = 1;
SDL_BlitSurface(oryg, &rect, temp_src, NULL); //this bar is copied to temp_src
temp_dest = SDL_CreateRGBSurface(SDL_SWSURFACE, 1, 80 + 2 * i, canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask,
canvas->format->Amask);
temp_dest = api->scale(temp_src, 1, 80 + 2 * i, 0); //temp_dest stores scaled temp_src
temp_rect.x = 0;
temp_rect.y = i;
temp_rect.w = 1;
temp_rect.h = 80;
SDL_BlitSurface(temp_dest, &temp_rect, output, &rect); //let's copy it to output
//right side then
rect.x = 79 - i;
SDL_BlitSurface(oryg, &rect, temp_src, NULL); //this bar is copied to temp_src //OK
temp_dest = api->scale(temp_src, 1, 80 + 2 * i, 0); //temp_dest stores scaled temp_src
SDL_BlitSurface(temp_dest, &temp_rect, output, &rect); //let's copy it to output
}
//do horizontal fisheye
for (i = 0; i < 40; i++)
{
temp_src = SDL_CreateRGBSurface(SDL_SWSURFACE, 80, 1, canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask,
canvas->format->Amask);
temp_dest = SDL_CreateRGBSurface(SDL_SWSURFACE, 80 + 2 * i, 1, canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask,
canvas->format->Amask);
//upper side first
rect.x = 0;
rect.y = i;
rect.w = 80;
rect.h = 1;
temp_rect.x = i;
temp_rect.y = 0;
temp_rect.w = 80;
temp_rect.h = 1;
SDL_BlitSurface(output, &rect, temp_src, NULL);
temp_dest = api->scale(temp_src, 80 + 2 * i, 1, 0);
SDL_BlitSurface(temp_dest, &temp_rect, output, &rect);
//lower side then
rect.y = 79 - i;
SDL_BlitSurface(output, &rect, temp_src, NULL);
temp_dest = api->scale(temp_src, 80 + 2 * i, 1, 0);
SDL_BlitSurface(temp_dest, &temp_rect, output, &rect);
}
rect.x = x - 40;
rect.y = y - 40;
rect.w = rect.h = 80;
//let's blit an area surrounded by a circle
for (yy = y - 40; yy < y + 40; yy++)
for (xx = x - 40; xx < x + 40; xx++)
if (api->in_circle(xx - x, yy - y, 40))
api->putpixel(canvas, xx, yy, api->getpixel(output, xx + 40 - x, yy + 40 - y));
SDL_FreeSurface(oryg);
SDL_FreeSurface(output);
SDL_FreeSurface(temp_dest);
SDL_FreeSurface(temp_src);
api->playsound(fisheye_snd, (x * 255) / canvas->w, 255);
}
void fisheye_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int ox, int oy, int x, int y, SDL_Rect * update_rect)
{
api->line(api, which, canvas, snapshot, ox, oy, x, y, 1, fisheye_draw);
update_rect->x = min(ox, x) - 40;
update_rect->y = min(oy, y) - 40;
update_rect->w = max(ox, x) - update_rect->x + 40;
update_rect->h = max(oy, y) - update_rect->y + 40;
}
void fisheye_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
{
last_x = -80; /* A value that will be beyond any clicked position */
last_y = -80;
fisheye_drag(api, which, canvas, last, x, y, x, y, update_rect);
}
void fisheye_switchin(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
}
void fisheye_switchout(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
}
int fisheye_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return (MODE_PAINT);
}
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