/* * 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 "render/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() == RENDER_SOFTWARE) { 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() == RENDER_SOFTWARE || !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); } }