Stewie` Fader R4

#include <a_samp>

forward Fader_PlayerProcess(playerid);
forward OnPlayerFadeIn(playerid);
forward OnPlayerFadeOut(playerid);
stock fadeIn(playerid, ms, color = 0x000000FF);
stock fadeOut(playerid, ms, color = 0x000000FF);

static const
    MAX_TRANSPARENCY = 0xFF,
    TIMER_FRAME = 25;

enum {
    FADE_IN = 1,
    FADE_OUT
}

enum E_PLAYER_FADE_INFO {
    PlayerText:fadeText,
    fadeCurrentAlpha,

    fadeTotalFrames,
    fadeTransparencyPerFrame,
    fadeColor,

    fadeTimer,
    fadeType
}
static gPlayerFadeInfo[MAX_PLAYERS][E_PLAYER_FADE_INFO];

#define CAP_MAX(%0) ((%0 > MAX_TRANSPARENCY) ? (MAX_TRANSPARENCY) : %0)
#define CAP_MIN(%0) ((%0 < 0) ? (0) : %0)

/* Natives:
*   native fadeIn(playerid, ms, color = 0x000000FF);
*   native fadeOut(playerid, ms, color = 0x000000FF);
*
*   por Stewie`
*/

stock fadeIn(playerid, ms, color = 0x000000FF) {
    if(!IsPlayerConnected(playerid))
        return 0;

    // pegar a transparência atual da textdraw
    new alpha = gPlayerFadeInfo[playerid][fadeCurrentAlpha];
    // no caso da textdraw tiver a transparência cheia, ou mais do que o permitido, o nosso trabalho está feito
    if((MAX_TRANSPARENCY - alpha) <= 0) {
        gPlayerFadeInfo[playerid][fadeCurrentAlpha] = MAX_TRANSPARENCY;
        gPlayerFadeInfo[playerid][fadeType] = 0;

        PlayerTextDrawBoxColor(playerid, gPlayerFadeInfo[playerid][fadeText], (gPlayerFadeInfo[playerid][fadeColor] << 8) | alpha);
        PlayerTextDrawShow(playerid, gPlayerFadeInfo[playerid][fadeText]);
        return 1;
    }
    // configurar o tipo de fade que estamos aplicando
    gPlayerFadeInfo[playerid][fadeType] = FADE_IN;

    // mover um byte para a direita para 'apagar' a transparência
    // e '>>' para não voltar para o começo os primeiros bits
    gPlayerFadeInfo[playerid][fadeColor] = color >> 8;

    // a quantidade de frames que o PlayerProcess irá processar
    // você pode perceber que a duração é dividida pelos frames por processamento e, se existe restante, é adicinado mais um processamento
    gPlayerFadeInfo[playerid][fadeTotalFrames] = ((ms / TIMER_FRAME) + _:((ms % TIMER_FRAME) > 0));
    // o tanto de transparência que será adicionado por cada processamento
    // no fim, deve ser checado a quantidade de transarência que a textdraw possui
    // a transparência que será adicionada até o final é dividida pela quantidade de frames que serão rodados
    gPlayerFadeInfo[playerid][fadeTransparencyPerFrame] =  (MAX_TRANSPARENCY - alpha) / gPlayerFadeInfo[playerid][fadeTotalFrames];

    if(gPlayerFadeInfo[playerid][fadeTransparencyPerFrame] <= 0) {
        gPlayerFadeInfo[playerid][fadeTransparencyPerFrame] = 10;
    }

    PlayerTextDrawBoxColor(playerid, gPlayerFadeInfo[playerid][fadeText], (gPlayerFadeInfo[playerid][fadeColor] << 8) | alpha);
    PlayerTextDrawShow(playerid, gPlayerFadeInfo[playerid][fadeText]);
    // se não existir o timer, criá-lo!
    if(!gPlayerFadeInfo[playerid][fadeTimer]) {
        gPlayerFadeInfo[playerid][fadeTimer] = SetTimerEx("Fader_PlayerProcess", TIMER_FRAME, 1, "i", playerid);
    }
    return 1;
}

stock fadeOut(playerid, ms, color = 0x000000FF) {
    if(!IsPlayerConnected(playerid))
        return 0;

    // pegar a transparência atual da textdraw
    new alpha = gPlayerFadeInfo[playerid][fadeCurrentAlpha];
    // no caso da textdraw não tiver nenhuma transparênca, sair
    if(alpha <= 0) {
        gPlayerFadeInfo[playerid][fadeCurrentAlpha] = MAX_TRANSPARENCY;
        gPlayerFadeInfo[playerid][fadeType] = 0;

        PlayerTextDrawBoxColor(playerid, gPlayerFadeInfo[playerid][fadeText], (gPlayerFadeInfo[playerid][fadeColor] << 8) | alpha);
        PlayerTextDrawShow(playerid, gPlayerFadeInfo[playerid][fadeText]);
        return 1;
    }
    // configurar o tipo de fade que estamos aplicando
    gPlayerFadeInfo[playerid][fadeType] = FADE_OUT;

    // mover um byte para a direita para 'apagar' a transparência
    // e '>>' para não voltar para o começo os primeiros bits
    gPlayerFadeInfo[playerid][fadeColor] = color >> 8;

    // a quantidade de frames que o PlayerProcess irá processar
    // você pode perceber que a duração é dividida pelos frames por processamento e, se existe restante, é adicinado mais um processamento
    gPlayerFadeInfo[playerid][fadeTotalFrames] = ((ms / TIMER_FRAME) + _:((ms % TIMER_FRAME) > 0));
    // o tanto de transparência que será subtraída por cada processamento
    // no fim, deve ser checado a quantidade de transarência que a textdraw possui
    // a transparência que será subtraída até o final é dividida pela quantidade de frames que serão rodados
    gPlayerFadeInfo[playerid][fadeTransparencyPerFrame] =  (alpha) / gPlayerFadeInfo[playerid][fadeTotalFrames];

    if(gPlayerFadeInfo[playerid][fadeTransparencyPerFrame] <= 0) {
        gPlayerFadeInfo[playerid][fadeTransparencyPerFrame] = 10;
    }

    PlayerTextDrawBoxColor(playerid, gPlayerFadeInfo[playerid][fadeText], (gPlayerFadeInfo[playerid][fadeColor] << 8) | alpha);
    PlayerTextDrawShow(playerid, gPlayerFadeInfo[playerid][fadeText]);
    // se não existir o timer, criá-lo!
    if(!gPlayerFadeInfo[playerid][fadeTimer]) {
        gPlayerFadeInfo[playerid][fadeTimer] = SetTimerEx("Fader_PlayerProcess", TIMER_FRAME, 1, "i", playerid);
    }
    return 1;
}

public Fader_PlayerProcess(playerid) {
    // se o fade foi desligado para o player, mas o timer ainda está ativo
    if(gPlayerFadeInfo[playerid][fadeType] == 0) {
        // se o timer existe
        if(gPlayerFadeInfo[playerid][fadeTimer] > 0) {
            KillTimer(gPlayerFadeInfo[playerid][fadeTimer]);
            gPlayerFadeInfo[playerid][fadeTimer] = 0;

            PlayerTextDrawBoxColor(playerid, gPlayerFadeInfo[playerid][fadeText], (gPlayerFadeInfo[playerid][fadeColor] << 8) | gPlayerFadeInfo[playerid][fadeCurrentAlpha]);
            PlayerTextDrawShow(playerid, gPlayerFadeInfo[playerid][fadeText]);
        }
    }

    switch(gPlayerFadeInfo[playerid][fadeType]) {
        case FADE_IN: {
            gPlayerFadeInfo[playerid][fadeCurrentAlpha] += gPlayerFadeInfo[playerid][fadeTransparencyPerFrame];
            gPlayerFadeInfo[playerid][fadeCurrentAlpha] = CAP_MAX(gPlayerFadeInfo[playerid][fadeCurrentAlpha]);

            PlayerTextDrawBoxColor(playerid, gPlayerFadeInfo[playerid][fadeText], (gPlayerFadeInfo[playerid][fadeColor] << 8) | gPlayerFadeInfo[playerid][fadeCurrentAlpha]);
            PlayerTextDrawShow(playerid, gPlayerFadeInfo[playerid][fadeText]);

            if(gPlayerFadeInfo[playerid][fadeCurrentAlpha] == MAX_TRANSPARENCY) {
                gPlayerFadeInfo[playerid][fadeType] = 0;
                KillTimer(gPlayerFadeInfo[playerid][fadeTimer]);
                gPlayerFadeInfo[playerid][fadeTimer] = 0;

                CallLocalFunction("OnPlayerFadeIn", "i", playerid);
            }
        }
        case FADE_OUT: {
            gPlayerFadeInfo[playerid][fadeCurrentAlpha] -= gPlayerFadeInfo[playerid][fadeTransparencyPerFrame];
            gPlayerFadeInfo[playerid][fadeCurrentAlpha] = CAP_MIN(gPlayerFadeInfo[playerid][fadeCurrentAlpha]);

            PlayerTextDrawBoxColor(playerid, gPlayerFadeInfo[playerid][fadeText], (gPlayerFadeInfo[playerid][fadeColor] << 8) | gPlayerFadeInfo[playerid][fadeCurrentAlpha]);
            PlayerTextDrawShow(playerid, gPlayerFadeInfo[playerid][fadeText]);

            if(gPlayerFadeInfo[playerid][fadeCurrentAlpha] == 0) {
                gPlayerFadeInfo[playerid][fadeType] = 0;
                KillTimer(gPlayerFadeInfo[playerid][fadeTimer]);
                gPlayerFadeInfo[playerid][fadeTimer] = 0;

                CallLocalFunction("OnPlayerFadeOut", "i", playerid);
            }
        }
    }
    return 1;
}

public OnPlayerConnect(playerid) {
    new tmp[E_PLAYER_FADE_INFO];
    gPlayerFadeInfo[playerid] = tmp;

    new PlayerText:text = CreatePlayerTextDraw(playerid, -20.0, -20.0, "_");
    gPlayerFadeInfo[playerid][fadeText] = text;
    // detalhes
    PlayerTextDrawUseBox(playerid, text, 1);
    PlayerTextDrawBoxColor(playerid, text, 0xFFFFFF00);
    PlayerTextDrawLetterSize(playerid, text, 680.0, 500.0);
    PlayerTextDrawTextSize(playerid, text, 680.0, 500.0);

    if (funcidx("Fader_OnPlayerConnect") != -1)
    {
        return CallLocalFunction("Fader_OnPlayerConnect", "i", playerid);
    }
    return 1;
}

public OnPlayerDisconnect(playerid,reason) {
    gPlayerFadeInfo[playerid][fadeTimer] = 0;

    if (funcidx("Fader_OnPlayerDisconnect") != -1)
    {
        return CallLocalFunction("Fader_OnPlayerDisconnect", "ii", playerid, reason);
    }
    return 1;
}

#if defined _ALS_OnPlayerConnect
    #undef OnPlayerConnect
#else
    #define _ALS_OnPlayerConnect
#endif
#define OnPlayerConnect Fader_OnPlayerConnect
forward Fader_OnPlayerConnect(playerid);

#if defined _ALS_OnPlayerDisconnect
    #undef OnPlayerDisconnect
#else
    #define _ALS_OnPlayerDisconnect
#endif
#define OnPlayerDisconnect Fader_OnPlayerDisconnect
forward OnPlayerDisconnect(playerid, reason);