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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004 The ScummVM project
*
* The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
*
* 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.
*
* $Header$
*
*/
// Event management module
#include "saga/saga.h"
#include "saga/gfx.h"
#include "saga/yslib.h"
#include "saga/animation.h"
#include "saga/console.h"
#include "saga/scene.h"
#include "saga/interface.h"
#include "saga/text.h"
#include "saga/palanim.h"
#include "saga/render.h"
#include "saga/game_mod.h"
#include "saga/sndres.h"
#include "saga/music.h"
#include "saga/events.h"
namespace Saga {
Events::Events(SagaEngine *vm) : _vm(vm), _initialized(false) {
debug(0, "Initializing event subsystem...");
_eventList = ys_dll_create();
if (_eventList)
_initialized = true;
}
Events::~Events(void) {
debug(0, "Shutting down event subsystem...");
freeList();
}
// Function to process event list once per frame.
// First advances event times, then processes each event with the appropriate
// handler depending on the type of event.
int Events::handleEvents(long msec) {
YS_DL_NODE *walk_node;
YS_DL_NODE *next_node;
R_EVENT *event_p;
long delta_time;
int result;
// Advance event times
processEventTime(msec);
// Process each event in list
for (walk_node = ys_dll_head(_eventList); walk_node != NULL; walk_node = next_node) {
event_p = (R_EVENT *)ys_dll_get_data(walk_node);
// Save next event in case current event is handled and removed
next_node = ys_dll_next(walk_node);
// Call the appropriate event handler for the specific event type
switch (event_p->type) {
case R_ONESHOT_EVENT:
result = handleOneShot(event_p);
break;
case R_CONTINUOUS_EVENT:
result = handleContinuous(event_p);
break;
case R_INTERVAL_EVENT:
result = handleInterval(event_p);
break;
default:
result = R_EVENT_INVALIDCODE;
warning("Invalid event code encountered");
break;
}
// Process the event appropriately based on result code from
// handler
if ((result == R_EVENT_DELETE) || (result == R_EVENT_INVALIDCODE)) {
// If there is no event chain, delete the base event.
if (event_p->chain == NULL) {
ys_dll_delete(walk_node);
} else {
// If there is an event chain present, move the next event
// in the chain up, adjust it by the previous delta time,
// and reprocess the event by adjusting next_node. */
delta_time = event_p->time;
ys_dll_replace(walk_node, event_p->chain, sizeof *event_p);
event_p = (R_EVENT *)ys_dll_get_data(walk_node);
event_p->time += delta_time;
next_node = walk_node;
}
} else if (result == R_EVENT_BREAK) {
break;
}
}
return R_SUCCESS;
}
int Events::handleContinuous(R_EVENT *event) {
double event_pc = 0.0; // Event completion percentage
int event_done = 0;
R_BUFFER_INFO buf_info;
SCENE_BGINFO bg_info;
R_SURFACE *back_buf;
event_pc = ((double)event->duration - event->time) / event->duration;
if (event_pc >= 1.0) {
// Cap percentage to 100
event_pc = 1.0;
event_done = 1;
}
if (event_pc < 0.0) {
// Event not signaled, skip it
return R_EVENT_CONTINUE;
} else if (!(event->code & R_SIGNALED)) {
// Signal event
event->code |= R_SIGNALED;
event_pc = 0.0;
}
switch (event->code & R_EVENT_MASK) {
case R_PAL_EVENT:
switch (event->op) {
case EVENT_BLACKTOPAL:
back_buf = _vm->_gfx->getBackBuffer();
_vm->_gfx->blackToPal(back_buf, (PALENTRY *)event->data, event_pc);
break;
case EVENT_PALTOBLACK:
back_buf = _vm->_gfx->getBackBuffer();
_vm->_gfx->palToBlack(back_buf, (PALENTRY *)event->data, event_pc);
break;
default:
break;
}
break;
case R_TRANSITION_EVENT:
switch (event->op) {
case EVENT_DISSOLVE:
_vm->_render->getBufferInfo(&buf_info);
_vm->_scene->getBGInfo(&bg_info);
TRANSITION_Dissolve(buf_info.r_bg_buf, buf_info.r_bg_buf_w, buf_info.r_bg_buf_h,
buf_info.r_bg_buf_w, bg_info.bg_buf, bg_info.bg_w,
bg_info.bg_h, bg_info.bg_p, 0, 0, 0, event_pc);
break;
case EVENT_DISSOLVE_BGMASK:
// we dissolve it centered.
// set flag of Dissolve to 1. It is a hack to simulate zero masking.
int w, h;
byte *mask_buf;
size_t len;
_vm->_render->getBufferInfo(&buf_info);
_vm->_scene->getBGMaskInfo(&w, &h, &mask_buf, &len);
TRANSITION_Dissolve(buf_info.r_bg_buf, buf_info.r_bg_buf_w, buf_info.r_bg_buf_h,
buf_info.r_bg_buf_w, mask_buf, w, h, 0, 1, (320 - w) / 2,
(200 - h) / 2, event_pc);
break;
default:
break;
}
break;
case R_CONSOLE_EVENT:
switch (event->op) {
case EVENT_ACTIVATE:
_vm->_console->dropConsole(event_pc);
break;
case EVENT_DEACTIVATE:
_vm->_console->raiseConsole(event_pc);
break;
default:
break;
}
break;
default:
break;
}
if (event_done) {
return R_EVENT_DELETE;
}
return R_EVENT_CONTINUE;
}
int Events::handleOneShot(R_EVENT *event) {
R_SURFACE *back_buf;
static SCENE_BGINFO bginfo;
if (event->time > 0) {
return R_EVENT_CONTINUE;
}
// Event has been signaled
switch (event->code & R_EVENT_MASK) {
case R_TEXT_EVENT:
switch (event->op) {
case EVENT_DISPLAY:
_vm->textSetDisplay((R_TEXTLIST_ENTRY *)event->data, 1);
break;
case EVENT_REMOVE:
{
R_SCENE_INFO scene_info;
_vm->_scene->getInfo(&scene_info);
_vm->textDeleteEntry(scene_info.text_list, (R_TEXTLIST_ENTRY *)event->data);
}
break;
default:
break;
}
break;
case R_VOICE_EVENT:
_vm->_sndRes->playVoice(event->param);
break;
case R_MUSIC_EVENT:
_vm->_music->play(event->param, event->param2);
break;
case R_BG_EVENT:
{
R_BUFFER_INFO rbuf_info;
R_POINT bg_pt;
if (_vm->_scene->getMode() == R_SCENE_MODE_NORMAL) {
back_buf = _vm->_gfx->getBackBuffer();
_vm->_render->getBufferInfo(&rbuf_info);
_vm->_scene->getBGInfo(&bginfo);
bg_pt.x = bginfo.bg_x;
bg_pt.y = bginfo.bg_y;
_vm->_gfx->bufToBuffer(rbuf_info.r_bg_buf, rbuf_info.r_bg_buf_w, rbuf_info.r_bg_buf_h,
bginfo.bg_buf, bginfo.bg_w, bginfo.bg_h, NULL, &bg_pt);
if (event->param == SET_PALETTE) {
PALENTRY *pal_p;
_vm->_scene->getBGPal(&pal_p);
_vm->_gfx->setPalette(back_buf, pal_p);
}
}
}
break;
case R_ANIM_EVENT:
switch (event->op) {
case EVENT_FRAME:
_vm->_anim->play(event->param, event->time);
break;
case EVENT_SETFLAG:
_vm->_anim->setFlag(event->param, event->param2);
break;
case EVENT_CLEARFLAG:
_vm->_anim->clearFlag(event->param, event->param2);
break;
default:
break;
}
break;
case R_SCENE_EVENT:
switch (event->op) {
case EVENT_END:
_vm->_scene->nextScene();
return R_EVENT_BREAK;
break;
default:
break;
}
break;
case R_PALANIM_EVENT:
switch (event->op) {
case EVENT_CYCLESTART:
_vm->_palanim->cycleStart();
break;
case EVENT_CYCLESTEP:
_vm->_palanim->cycleStep(event->time);
break;
default:
break;
}
break;
case R_INTERFACE_EVENT:
switch (event->op) {
case EVENT_ACTIVATE:
_vm->_interface->activate();
break;
default:
break;
}
break;
default:
break;
}
return R_EVENT_DELETE;
}
int Events::handleInterval(R_EVENT *event) {
return R_EVENT_DELETE;
}
// Schedules an event in the event list; returns a pointer to the scheduled
// event suitable for chaining if desired.
R_EVENT *Events::queue(R_EVENT *event) {
YS_DL_NODE *new_node;
R_EVENT *queued_event;
event->chain = NULL;
new_node = ys_dll_add_tail(_eventList, event, sizeof *event);
if (new_node == NULL) {
return NULL;
}
queued_event = (R_EVENT *)ys_dll_get_data(new_node);
initializeEvent(queued_event);
return queued_event;
}
// Places a 'add_event' on the end of an event chain given by 'head_event'
// (head_event may be in any position in the event chain)
R_EVENT *Events::chain(R_EVENT *head_event, R_EVENT *add_event) {
R_EVENT *walk_event;
R_EVENT *new_event;
// Allocate space for new event
new_event = (R_EVENT *)malloc(sizeof *new_event);
if (new_event == NULL) {
return NULL;
}
// Copy event data to new event
*new_event = *add_event;
// Walk to end of chain
for (walk_event = head_event; walk_event->chain != NULL; walk_event = walk_event->chain) {
continue;
}
// Place new event
walk_event->chain = new_event;
new_event->chain = NULL;
initializeEvent(new_event);
return new_event;
}
int Events::initializeEvent(R_EVENT *event) {
switch (event->type) {
case R_ONESHOT_EVENT:
break;
case R_CONTINUOUS_EVENT:
event->time += event->duration;
break;
case R_INTERVAL_EVENT:
break;
default:
return R_FAILURE;
break;
}
return R_SUCCESS;
}
int Events::clearList() {
YS_DL_NODE *walk_node;
YS_DL_NODE *next_node;
R_EVENT *chain_walk;
R_EVENT *next_chain;
R_EVENT *event_p;
// Walk down event list
for (walk_node = ys_dll_head(_eventList); walk_node != NULL; walk_node = next_node) {
next_node = ys_dll_next(walk_node);
event_p = (R_EVENT *)ys_dll_get_data(walk_node);
// Only remove events not marked R_NODESTROY (engine events)
if (!(event_p->code & R_NODESTROY)) {
// Remove any events chained off this one */
for (chain_walk = event_p->chain; chain_walk != NULL; chain_walk = next_chain) {
next_chain = chain_walk->chain;
free(chain_walk);
}
ys_dll_delete(walk_node);
}
}
return R_SUCCESS;
}
// Removes all events from the list (even R_NODESTROY)
int Events::freeList() {
YS_DL_NODE *walk_node;
YS_DL_NODE *next_node;
R_EVENT *chain_walk;
R_EVENT *next_chain;
R_EVENT *event_p;
// Walk down event list
for (walk_node = ys_dll_head(_eventList); walk_node != NULL; walk_node = next_node) {
event_p = (R_EVENT *)ys_dll_get_data(walk_node);
// Remove any events chained off current node
for (chain_walk = event_p->chain; chain_walk != NULL; chain_walk = next_chain) {
next_chain = chain_walk->chain;
free(chain_walk);
}
// Delete current node
next_node = ys_dll_next(walk_node);
ys_dll_delete(walk_node);
}
return R_SUCCESS;
}
// Walks down the event list, updating event times by 'msec'.
int Events::processEventTime(long msec) {
YS_DL_NODE *walk_node;
R_EVENT *event_p;
uint16 event_count = 0;
for (walk_node = ys_dll_head(_eventList); walk_node != NULL; walk_node = ys_dll_next(walk_node)) {
event_p = (R_EVENT *)ys_dll_get_data(walk_node);
event_p->time -= msec;
event_count++;
if (event_count > R_EVENT_WARNINGCOUNT) {
warning("Event list exceeds %u", R_EVENT_WARNINGCOUNT);
}
}
return R_SUCCESS;
}
} // End of namespace Saga
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