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path: root/engines/gob/pregob/pregob.cpp
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/* 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.
 *
 */

#include "graphics/cursorman.h"

#include "gob/gob.h"
#include "gob/global.h"
#include "gob/util.h"
#include "gob/surface.h"
#include "gob/palanim.h"
#include "gob/draw.h"
#include "gob/video.h"
#include "gob/aniobject.h"

#include "gob/pregob/pregob.h"

namespace Gob {

PreGob::PreGob(GobEngine *vm) : _vm(vm), _fadedOut(false) {
}

PreGob::~PreGob() {
}

void PreGob::fadeOut() {
	if (_fadedOut || _vm->shouldQuit())
		return;

	// Fade to black
	_vm->_palAnim->fade(0, 0, 0);

	_fadedOut = true;
}

void PreGob::fadeIn() {
	if (!_fadedOut || _vm->shouldQuit())
		return;

	// Fade to palette
	_vm->_draw->blitInvalidated();
	_vm->_palAnim->fade(_vm->_global->_pPaletteDesc, 0, 0);
	_vm->_draw->dirtiedRect(_vm->_draw->_backSurface, 0, 0, 319, 199);

	_fadedOut = false;
}

void PreGob::clearScreen() {
	_vm->_draw->_backSurface->clear();
	_vm->_draw->dirtiedRect(_vm->_draw->_backSurface, 0, 0, 319, 199);
	_vm->_draw->blitInvalidated();
	_vm->_video->retrace();
}

void PreGob::initScreen() {
	_vm->_util->setFrameRate(15);

	_fadedOut = true;

	_vm->_draw->initScreen();

	_vm->_draw->_backSurface->clear();
	_vm->_util->clearPalette();

	_vm->_draw->forceBlit();
	_vm->_video->retrace();

	_vm->_util->processInput();
}

void PreGob::setPalette(const byte *palette, uint16 size) {
	memcpy(_vm->_draw->_vgaPalette, palette, 3 * size);

	// If we didn't fade out prior, immediately set the palette
	if (!_fadedOut)
		_vm->_video->setFullPalette(_vm->_global->_pPaletteDesc);
}

void PreGob::addCursor() {
	CursorMan.pushCursor(0, 0, 0, 0, 0, 0);
}

void PreGob::removeCursor() {
	CursorMan.popCursor();
}

void PreGob::setCursor(Surface &sprite, int16 hotspotX, int16 hotspotY) {
	CursorMan.replaceCursor(sprite.getData(), sprite.getWidth(), sprite.getHeight(), hotspotX, hotspotY, 0);
}

void PreGob::setCursor(Surface &sprite, int16 left, int16 top, int16 right, int16 bottom,
                       int16 hotspotX, int16 hotspotY) {

	const int width  = right  - left + 1;
	const int height = bottom - top  + 1;

	if ((width <= 0) || (height <= 0))
		return;

	Surface cursor(width, height, 1);

	cursor.blit(sprite, left, top, right, bottom, 0, 0);

	setCursor(cursor, hotspotX, hotspotX);
}

void PreGob::showCursor() {
	CursorMan.showMouse(true);

	_vm->_draw->_showCursor = 4;
}

void PreGob::hideCursor() {
	CursorMan.showMouse(false);

	_vm->_draw->_showCursor = 0;
}

bool PreGob::isCursorVisible() const {
	return CursorMan.isVisible();
}

void PreGob::endFrame(bool doInput) {
	_vm->_draw->blitInvalidated();
	_vm->_util->waitEndFrame();

	if (doInput)
		_vm->_util->processInput();
}

int16 PreGob::checkInput(int16 &mouseX, int16 &mouseY, MouseButtons &mouseButtons) {
	_vm->_util->getMouseState(&mouseX, &mouseY, &mouseButtons);
	_vm->_util->forceMouseUp();

	return _vm->_util->checkKey();
}

int16 PreGob::waitInput(int16 &mouseX, int16 &mouseY, MouseButtons &mouseButtons) {
	bool finished = false;

	int16 key = 0;
	while (!_vm->shouldQuit() && !finished) {
		endFrame(true);

		key = checkInput(mouseX, mouseY, mouseButtons);

		finished = (mouseButtons != kMouseButtonsNone) || (key != 0);
	}

	return key;
}

int16 PreGob::waitInput() {
	int16 mouseX, mouseY;
	MouseButtons mouseButtons;

	return waitInput(mouseX, mouseY, mouseButtons);
}

bool PreGob::hasInput() {
	int16 mouseX, mouseY;
	MouseButtons mouseButtons;

	return checkInput(mouseX, mouseY, mouseButtons) || (mouseButtons != kMouseButtonsNone);
}

void PreGob::clearAnim(ANIObject &ani) {
	int16 left, top, right, bottom;

	if (ani.clear(*_vm->_draw->_backSurface, left, top, right, bottom))
		_vm->_draw->dirtiedRect(_vm->_draw->_backSurface, left, top, right, bottom);
}

void PreGob::drawAnim(ANIObject &ani) {
	int16 left, top, right, bottom;

	if (ani.draw(*_vm->_draw->_backSurface, left, top, right, bottom))
		_vm->_draw->dirtiedRect(_vm->_draw->_backSurface, left, top, right, bottom);
	ani.advance();
}

void PreGob::redrawAnim(ANIObject &ani) {
	clearAnim(ani);
	drawAnim(ani);
}

} // End of namespace Gob