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/* -*- C++ -*-
*
* PonscripterLabel_effect_cascade.cpp
* - Emulation of Takashi Toyama's "cascade.dll" NScripter plugin effect
*
* Copyright (c) 2008-2011 "Uncle" Mion Sonozaki
*
* UncleMion@gmail.com
*
* Copyright (c) 2019-2019 Ogapee
*
* ogapee@aqua.dti2.ne.jp
*
* 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, see <http://www.gnu.org/licenses/>
* or write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "ONScripter.h"
void ONScripter::effectCascade( char *params, int duration )
{
enum {
//some constants for cascade
CASCADE_DIR = 1,
CASCADE_LR = 2,
CASCADE_UP = 0,
CASCADE_DOWN = 1,
CASCADE_LEFT = 2,
CASCADE_RIGHT = 3,
CASCADE_CROSS = 4,
CASCADE_IN = 8
};
SDL_Surface *src_surface;
SDL_Rect src_rect = screen_rect;
SDL_Rect dst_rect = screen_rect;
int mode, width, start, end;
while (*params != 0 && *params != '/') params++;
if (*params == '/') params++;
if (params[0] == 'u')
mode = CASCADE_UP;
else if (params[0] == 'd')
mode = CASCADE_DOWN;
else if (params[0] == 'r')
mode = CASCADE_RIGHT;
else
mode = CASCADE_LEFT;
if (params[1] == 'i')
mode |= CASCADE_IN;
else if (params[1] == 'x')
mode |= CASCADE_IN | CASCADE_CROSS;
if (mode & CASCADE_IN)
src_surface = effect_dst_surface;
else
src_surface = effect_src_surface;
bool dir_flag = false;
if ((!(mode & CASCADE_DIR) && !(mode & CASCADE_IN)) ||
((mode & CASCADE_DIR) && (mode & CASCADE_IN)))
dir_flag = true;
if (mode & CASCADE_LR) {
// moves left-right
width = screen_width * effect_counter / duration;
if (!(mode & CASCADE_IN))
width = screen_width - width;
src_rect.y = dst_rect.y = 0;
src_rect.h = dst_rect.h = screen_height;
src_rect.w = dst_rect.w = 1;
if ((mode & CASCADE_CROSS) && (width > 0)) {
// need to cascade-out the src
if (mode & CASCADE_DIR) {
// moves right
start = 0;
end = width;
dst_rect.x = end;
} else {
// moves left
start = screen_width - width;
end = screen_width;
dst_rect.x = start;
}
src_rect.x = 0;
SDL_BlitSurface(effect_src_surface, &dst_rect, accumulation_surface, &src_rect);
for (int i=start; i<end; i++) {
dst_rect.x = i;
SDL_BlitSurface(accumulation_surface, &src_rect, effect_src_surface, &dst_rect);
}
}
if (dir_flag){
start = width;
end = screen_width;
src_rect.x = start;
} else {
start = 0;
end = screen_width - width;
src_rect.x = end;
}
for (int i=start; i<end; i++) {
dst_rect.x = i;
SDL_BlitSurface(src_surface, &src_rect, accumulation_surface, &dst_rect);
}
if (dir_flag)
src_rect.x = 0;
else
src_rect.x = screen_width - width;
dst_rect.x = src_rect.x;
src_rect.w = dst_rect.w = width;
SDL_BlitSurface(src_surface, &src_rect, accumulation_surface, &dst_rect);
} else {
// moves up-down
width = screen_height * effect_counter / duration;
if (!(mode & CASCADE_IN))
width = screen_height - width;
src_rect.x = dst_rect.x = 0;
src_rect.h = dst_rect.h = 1;
src_rect.w = dst_rect.w = screen_width;
if ((mode & CASCADE_CROSS) && (width > 0)) {
// need to cascade-out the src
if (mode & CASCADE_DIR) {
// moves down
start = 0;
end = width;
dst_rect.y = end;
} else {
// moves up
start = screen_height - width;
end = screen_height;
dst_rect.y = start;
}
src_rect.y = 0;
SDL_BlitSurface(effect_src_surface, &dst_rect, accumulation_surface, &src_rect);
for (int i=start; i<end; i++) {
dst_rect.y = i;
SDL_BlitSurface(accumulation_surface, &src_rect, effect_src_surface, &dst_rect);
}
}
if (dir_flag){
start = width;
end = screen_height;
src_rect.y = start;
} else {
start = 0;
end = screen_height - width;
src_rect.y = end;
}
for (int i=start; i<end; i++) {
dst_rect.y = i;
SDL_BlitSurface(src_surface, &src_rect, accumulation_surface, &dst_rect);
}
if (dir_flag)
src_rect.y = 0;
else
src_rect.y = screen_height - width;
dst_rect.y = src_rect.y;
src_rect.h = dst_rect.h = width;
SDL_BlitSurface(src_surface, &src_rect, accumulation_surface, &dst_rect);
}
if (mode & CASCADE_CROSS) {
// do crossfade
width = 256 * effect_counter / duration;
SDL_Surface *tmp = effect_dst_surface;
effect_dst_surface = accumulation_surface;
alphaBlend(NULL, ALPHA_BLEND_CONST, width, &dirty_rect.bounding_box);
effect_dst_surface = tmp;
}
}
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