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/*
* The ManaPlus Client
* Copyright (C) 2009-2010 The Mana Developers
* Copyright (C) 2011-2013 The ManaPlus Developers
*
* This file is part of The ManaPlus 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/imagehelper.h"
#include "resources/resourcemanager.h"
#include "debug.h"
AmbientLayer::AmbientLayer(Image *const img, const float parallax,
const float speedX, const float speedY,
const bool keepRatio) :
mImage(img), mParallax(parallax),
mPosX(0), mPosY(0),
mSpeedX(speedX), mSpeedY(speedY),
mKeepRatio(keepRatio)
{
if (!mImage)
return;
if (keepRatio && !imageHelper->useOpenGL())
{
const int width = mainGraphics->mWidth;
const int height = mainGraphics->mHeight;
if (width != defaultScreenWidth && height != defaultScreenHeight)
{
// Rescale the overlay to keep the ratio as if we were on
// the default resolution...
Image *const rescaledOverlay = ResourceManager::getInstance()->
getRescaled(mImage, static_cast<int>(mImage->mBounds.w)
/ defaultScreenWidth * width,
static_cast<int>(mImage->mBounds.h)
/ defaultScreenHeight * height);
if (rescaledOverlay)
mImage = rescaledOverlay;
else
mImage->incRef();
return;
}
}
mImage->incRef();
}
AmbientLayer::~AmbientLayer()
{
if (mImage)
{
mImage->decRef();
mImage = nullptr;
}
}
void AmbientLayer::update(const int timePassed, const float dx, const float dy)
{
if (!mImage)
return;
const float time = static_cast<float>(timePassed) / 10;
// Self scrolling of the overlay
mPosX -= mSpeedX * time;
mPosY -= mSpeedY * time;
// Parallax scrolling
mPosX += dx * mParallax;
mPosY += dy * mParallax;
const float imgW = mImage->mBounds.w;
const float imgH = mImage->mBounds.h;
// 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 *const graphics, const int x,
const int y) const
{
if (!mImage)
return;
if (!imageHelper->useOpenGL() || !mKeepRatio)
{
graphics->drawImagePattern(mImage, static_cast<int>(-mPosX),
static_cast<int>(-mPosY), x + static_cast<int>(mPosX),
y + static_cast<int>(mPosY));
}
else
{
graphics->drawRescaledImagePattern(mImage, static_cast<int>(-mPosX),
static_cast<int>(-mPosY), x + static_cast<int>(mPosX),
y + static_cast<int>(mPosY),
static_cast<int>(mImage->mBounds.w)
/ defaultScreenWidth * graphics->mWidth,
static_cast<int>(mImage->mBounds.h) / defaultScreenHeight
* graphics->mHeight);
}
}
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