taisei/src/transition.c

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/*
* This software is licensed under the terms of the MIT-License
* See COPYING for further information.
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* ---
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* Copyright (c) 2011-2018, Lukas Weber <laochailan@web.de>.
* Copyright (c) 2012-2018, Andrei Alexeyev <akari@alienslab.net>.
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*/
#include "taisei.h"
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#include "transition.h"
#include "menu/ingamemenu.h"
#include "global.h"
Transition transition;
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void TransFadeBlack(double fade) {
fade_out(fade);
}
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void TransFadeWhite(double fade) {
colorfill(1, 1, 1, fade);
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}
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void TransLoader(double fade) {
glColor4f(1, 1, 1, fade);
draw_texture(SCREEN_W/2, SCREEN_H/2, "loading");
glColor4f(1, 1, 1, 1);
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}
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void TransMenu(double fade) {
glColor4f(1, 1, 1, fade);
draw_texture(SCREEN_W/2, SCREEN_H/2, "mainmenu/mainmenubg");
glColor4f(1, 1, 1, 1);
}
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void TransMenuDark(double fade) {
glColor4f(0.3, 0.3, 0.3, fade);
draw_texture(SCREEN_W/2, SCREEN_H/2, "mainmenu/mainmenubg");
glColor4f(1, 1, 1, 1);
}
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void TransEmpty(double fade) { }
static bool popq(void) {
if(transition.queued.rule) {
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transition.rule2 = transition.rule;
transition.rule = transition.queued.rule;
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if(transition.state == TRANS_IDLE || transition.rule2 == transition.rule) {
transition.rule2 = NULL;
}
transition.dur1 = transition.queued.dur1;
transition.dur2 = transition.queued.dur2;
transition.callback = transition.queued.callback;
transition.arg = transition.queued.arg;
transition.queued.rule = NULL;
if(transition.dur1 <= 0) {
transition.fade = 1.0;
transition.state = TRANS_FADE_OUT;
} else {
transition.state = TRANS_FADE_IN;
}
return true;
}
return false;
}
static void setq(TransitionRule rule, int dur1, int dur2, TransitionCallback cb, void *arg) {
transition.queued.rule = rule;
transition.queued.dur1 = dur1;
transition.queued.dur2 = dur2;
transition.queued.callback = cb;
transition.queued.arg = arg;
}
static void call_callback(void) {
if(transition.callback) {
transition.callback(transition.arg);
transition.callback = NULL;
}
}
void set_transition_callback(TransitionRule rule, int dur1, int dur2, TransitionCallback cb, void *arg) {
static bool initialized = false;
if(!rule) {
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return;
}
setq(rule, dur1, dur2, cb, arg);
if(!initialized) {
popq();
initialized = true;
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transition.rule2 = NULL;
}
if(transition.state == TRANS_IDLE || rule == transition.rule) {
popq();
}
}
void set_transition(TransitionRule rule, int dur1, int dur2) {
set_transition_callback(rule, dur1, dur2, NULL, NULL);
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}
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static bool check_transition(void) {
if(transition.state == TRANS_IDLE) {
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return false;
}
if(!transition.rule) {
transition.state = TRANS_IDLE;
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return false;
}
return true;
}
void draw_transition(void) {
if(!check_transition()) {
return;
}
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transition.rule(transition.fade);
if(transition.rule2 && transition.rule2 != transition.rule) {
transition.rule2(transition.fade);
}
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}
void update_transition(void) {
if(!check_transition()) {
return;
}
if(transition.state == TRANS_FADE_IN) {
transition.fade = approach(transition.fade, 1.0, 1.0/transition.dur1);
if(transition.fade == 1.0) {
transition.state = TRANS_FADE_OUT;
call_callback();
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if(popq()) {
call_callback();
}
}
} else if(transition.state == TRANS_FADE_OUT) {
transition.fade = transition.dur2 ? approach(transition.fade, 0.0, 1.0/transition.dur2) : 0.0;
if(transition.fade == 0.0) {
transition.state = TRANS_IDLE;
popq();
}
}
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}