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/*
* The Mana Client
* Copyright (C) 2009-2012 The Mana Developers
*
* This file is part of The Mana Client.
*
* 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
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "resources/ambientlayer.h"
#include "graphics.h"
#include "resources/image.h"
#include "resources/resourcemanager.h"
AmbientLayer::AmbientLayer(Image *img, float parallax,
float speedX, float speedY, bool keepRatio):
mImage(img), mParallax(parallax),
mPosX(0), mPosY(0),
mSpeedX(speedX), mSpeedY(speedY),
mKeepRatio(keepRatio)
{
mImage->incRef();
if (keepRatio && !mImage->useOpenGL()
&& defaultScreenWidth != 0
&& defaultScreenHeight != 0
&& graphics->getWidth() != defaultScreenWidth
&& graphics->getHeight() != defaultScreenHeight)
{
// Rescale the overlay to keep the ratio as if we were on
// the default resolution...
Image *rescaledOverlay = mImage->SDLgetScaledImage(
(int) mImage->getWidth() / defaultScreenWidth * graphics->getWidth(),
(int) mImage->getHeight() / defaultScreenHeight * graphics->getHeight());
if (rescaledOverlay)
{
mImage->decRef();
mImage = rescaledOverlay;
}
}
}
AmbientLayer::~AmbientLayer()
{
mImage->decRef();
}
void AmbientLayer::update(int timePassed, float dx, float dy)
{
// Self scrolling of the overlay
mPosX -= mSpeedX * timePassed / 10;
mPosY -= mSpeedY * timePassed / 10;
// Parallax scrolling
mPosX += dx * mParallax;
mPosY += dy * mParallax;
int imgW = mImage->getWidth();
int imgH = mImage->getHeight();
// Wrap values
while (mPosX > imgW)
mPosX -= imgW;
while (mPosX < 0)
mPosX += imgW;
while (mPosY > imgH)
mPosY -= imgH;
while (mPosY < 0)
mPosY += imgH;
}
void AmbientLayer::draw(Graphics *graphics, int x, int y)
{
if (!mImage->useOpenGL() || !mKeepRatio)
graphics->drawImagePattern(mImage,
(int) -mPosX, (int) -mPosY, x + (int) mPosX, y + (int) mPosY);
else
graphics->drawRescaledImagePattern(mImage,
(int) -mPosX, (int) -mPosY, x + (int) mPosX, y + (int) mPosY,
(int) mImage->getWidth() / defaultScreenWidth * graphics->getWidth(),
(int) mImage->getHeight() / defaultScreenHeight * graphics->getHeight());
}
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