mirror of
https://github.com/kichikuou/xsystem35-sdl2.git
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148 lines
4.0 KiB
C
148 lines
4.0 KiB
C
/*
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* sactamask.c: SACTEFAM.KLD 展開
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*
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* Copyright (C) 1997-1998 Masaki Chikama (Wren) <chikama@kasumi.ipl.mech.nagoya-u.ac.jp>
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* 1998- <masaki-c@is.aist-nara.ac.jp>
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*
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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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*
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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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*
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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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*
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*/
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/* $Id: sactamask.c,v 1.1 2003/04/22 16:29:52 chikama Exp $ */
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "portab.h"
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#include "system.h"
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#include "LittleEndian.h"
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#include "input.h"
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#include "sact.h"
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#include "pms.h"
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#include "sprite.h"
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#include "sdl_core.h"
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#include "mmap.h"
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// SACTEFAM を使ったマスク
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typedef struct {
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mmap_t *mmap;
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int datanum; // SACTEFAM.KLD 中のマスクファイルの数
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int *no; // シナリオ側での番号
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int *offset; // データへのオフセット
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} SACTEFAM_t;
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static SACTEFAM_t am;
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struct ecopyparam {
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int sttime;
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int curtime;
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int edtime;
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int curstep;
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int oldstep;
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};
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typedef struct ecopyparam ecopyparam_t;
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static ecopyparam_t ecp;
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// SACTEFAM.KLD の読み込み
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bool smask_init(char *path) {
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if (am.mmap)
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return true; // already loaded
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mmap_t *m = map_file(path);
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if (!m)
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return false;
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am.mmap = m;
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am.datanum = LittleEndian_getDW(m->addr, 0);
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am.no = malloc(sizeof(int) * am.datanum);
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am.offset = malloc(sizeof(int) * am.datanum);
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for (int i = 0; i < am.datanum; i++) {
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am.no[i] = LittleEndian_getDW(m->addr, 16 + i * 16);
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am.offset[i] = LittleEndian_getDW(m->addr, 16 + i * 16 + 8);
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}
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return true;
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}
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// 指定番号の alphamask ファイルをよみだす
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static cgdata *smask_get(int no) {
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int i;
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for (i = 0; i < am.datanum; i++) {
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if (am.no[i] == no) break;
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}
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if (i == am.datanum) return NULL;
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return pms256_extract(am.mmap->addr + am.offset[i]);
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}
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// Scale the alpha value in `mask` and write it to the alpha channel of `out`
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static void smask_update_alpha(SDL_Surface *out, cgdata *mask, int val) {
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uint8_t *src = mask->pic;
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for (int y = 0; y < mask->height; y++) {
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uint8_t *dst = (uint8_t*)out->pixels + y * out->pitch + (SDL_BYTEORDER == SDL_LIL_ENDIAN ? 3 : 0);
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for (int x = 0; x < mask->width; x++) {
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int i = 255 - (*src - val) * 16;
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*dst = min(255, max(0, i));
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src++; dst += 4;
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}
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}
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}
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/**
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* マスクつき画面更新
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*/
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void sp_eupdate_amap(int index, int time, int cancel) {
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cgdata *mask = smask_get(index);
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if (mask == NULL) {
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sp_update_all(true);
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return;
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}
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SDL_Surface *sf_old = SDL_ConvertSurface(main_surface, main_surface->format, 0);
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sp_update_all(false);
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SDL_Surface *sf_new = SDL_ConvertSurfaceFormat(main_surface, SDL_PIXELFORMAT_ARGB8888, 0);
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SDL_SetSurfaceBlendMode(sf_new, SDL_BLENDMODE_BLEND);
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SDL_BlitSurface(sf_old, NULL, main_surface, NULL);
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ecp.sttime = ecp.curtime = sdl_getTicks();
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ecp.edtime = ecp.curtime + time*10;
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ecp.oldstep = 0;
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while ((ecp.curtime = sdl_getTicks()) < ecp.edtime) {
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int curstep = 255 * (ecp.curtime - ecp.sttime)/ (ecp.edtime - ecp.sttime);
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smask_update_alpha(sf_new, mask, curstep);
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SDL_BlitSurface(sf_old, NULL, main_surface, NULL);
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SDL_BlitSurface(sf_new, NULL, main_surface, NULL);
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ags_updateFull();
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int key = sys_keywait(10, cancel ? KEYWAIT_CANCELABLE : KEYWAIT_NONCANCELABLE);
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if (cancel && key) break;
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}
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SDL_SetSurfaceBlendMode(sf_new, SDL_BLENDMODE_NONE);
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SDL_BlitSurface(sf_new, NULL, main_surface, NULL);
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ags_updateFull();
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SDL_FreeSurface(sf_new);
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SDL_FreeSurface(sf_old);
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cgdata_free(mask);
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}
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