/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
// Palette animation module
#include "saga/saga.h"
#include "saga/gfx.h"
#include "saga/events.h"
#include "saga/palanim.h"
#include "saga/interface.h"
namespace Saga {
PalAnim::PalAnim(SagaEngine *vm) : _vm(vm) {
_loaded = false;
_entryCount = 0;
_entries = NULL;
}
PalAnim::~PalAnim(void) {
}
int PalAnim::loadPalAnim(const byte *resdata, size_t resdata_len) {
void *test_p;
uint16 i;
if (_loaded) {
freePalAnim();
}
if (resdata == NULL) {
return FAILURE;
}
MemoryReadStreamEndian readS(resdata, resdata_len, _vm->isBigEndian());
if (_vm->getGameId() == GID_IHNM) {
return SUCCESS;
}
_entryCount = readS.readUint16();
debug(3, "PalAnim::loadPalAnim(): Loading %d PALANIM entries.", _entryCount);
test_p = malloc(_entryCount * sizeof(PalanimEntry));
_entries = (PalanimEntry *)test_p;
for (i = 0; i < _entryCount; i++) {
int color_count;
int pal_count;
int p, c;
_entries[i].cycle = 0;
color_count = readS.readUint16();
pal_count = readS.readUint16();
_entries[i].pal_count = pal_count;
_entries[i].color_count = color_count;
debug(2, "PalAnim::loadPalAnim(): Entry %d: Loading %d palette indices.\n", i, pal_count);
test_p = malloc(sizeof(char) * pal_count);
_entries[i].pal_index = (byte *)test_p;
debug(2, "PalAnim::loadPalAnim(): Entry %d: Loading %d SAGA_COLOR structures.", i, color_count);
test_p = malloc(sizeof(Color) * color_count);
_entries[i].colors = (Color *)test_p;
for (p = 0; p < pal_count; p++) {
_entries[i].pal_index[p] = readS.readByte();
}
for (c = 0; c < color_count; c++) {
_entries[i].colors[c].red = readS.readByte();
_entries[i].colors[c].green = readS.readByte();
_entries[i].colors[c].blue = readS.readByte();
}
}
_loaded = true;
return SUCCESS;
}
int PalAnim::cycleStart() {
Event event;
if (!_loaded) {
return FAILURE;
}
event.type = kEvTOneshot;
event.code = kPalAnimEvent;
event.op = kEventCycleStep;
event.time = PALANIM_CYCLETIME;
_vm->_events->queue(&event);
return SUCCESS;
}
int PalAnim::cycleStep(int vectortime) {
static PalEntry pal[256];
uint16 pal_index;
uint16 col_index;
uint16 i, j;
uint16 cycle;
uint16 cycle_limit;
Event event;
if (!_loaded) {
return FAILURE;
}
_vm->_gfx->getCurrentPal(pal);
for (i = 0; i < _entryCount; i++) {
cycle = _entries[i].cycle;
cycle_limit = _entries[i].color_count;
for (j = 0; j < _entries[i].pal_count; j++) {
pal_index = (unsigned char)_entries[i].pal_index[j];
col_index = (cycle + j) % cycle_limit;
pal[pal_index].red = (byte) _entries[i].colors[col_index].red;
pal[pal_index].green = (byte) _entries[i].colors[col_index].green;
pal[pal_index].blue = (byte) _entries[i].colors[col_index].blue;
}
_entries[i].cycle++;
if (_entries[i].cycle == cycle_limit) {
_entries[i].cycle = 0;
}
}
// Don't cycle the palette when the map is open
// Fixes bug #1900258 - "ITE: Glitch when looking at the map while at the docks"
if (_vm->_interface->getMode() != kPanelMap)
_vm->_gfx->setPalette(pal);
event.type = kEvTOneshot;
event.code = kPalAnimEvent;
event.op = kEventCycleStep;
event.time = vectortime + PALANIM_CYCLETIME;
_vm->_events->queue(&event);
return SUCCESS;
}
int PalAnim::freePalAnim() {
uint16 i;
if (!_loaded) {
return FAILURE;
}
for (i = 0; i < _entryCount; i++) {
debug(2, "PalAnim::freePalAnim(): Entry %d: Freeing colors.", i);
free(_entries[i].colors);
debug(2, "PalAnim::freePalAnim(): Entry %d: Freeing indices.", i);
free(_entries[i].pal_index);
}
debug(3, "PalAnim::freePalAnim(): Freeing entries.");
free(_entries);
_loaded = false;
return SUCCESS;
}
} // End of namespace Saga